Towards increasing the efficiency of Rubisco, through the use of carbonic anhydrase mimetics

Increasing photosynthetic efficiency remains one of the few routes left for substantial increases in crop yields. Rubisco, the enzyme responsible for fixating carbon dioxide from the atmosphere, is one of the major bottlenecks of photosynthesis. Some organisms have evolved carbon concentrating mechanisms, utilising carbonic anhydrase, to increase photosynthetic efficiency, by increasing local CO2 concentrations around Rubisco. This project aims to chemically mimic the role of carbonic anhydrase, through the use of small metal-ligand complexes, and to test their ability to perturb Rubisco’s activity. In order to achieve this goal, Rubisco had to be first isolated, and a robust Rubisco assay developed, to screen the efficacy of the CA mimetics. A hydrophobic interaction chromatography protocol for the isolation of Rubisco was developed, which eliminated the requirement of salt removal before column chromatography, reducing the number of purification steps in comparison to existing methods. The rapid protocol was employed to obtain highly pure and highly active Rubisco from Spinacia oleracea and Brassica oleracea. Furthermore, the protocol revealed, for the first time, the presence of hydrophobically distinct populations of Rubisco. A fast and sensitive 384-well plate Rubisco enzymatic assay was also developed, providing a robust platform to screen and test the efficacy of the carbonic anhydrase mimetics on Rubisco’s activity. A suite of existing and novel carbonic anhydrase mimetics were synthesised. A comparison of the pH-dependant CO2/HCO3- catalytic rates revealed a number of insights into the parameters that promote high interconversion rates of HCO3- to CO2: i) high electron-donating ligands, and hydrophobic ligands for ‘substrate channelling’ increased HCO3- dehydration rates, ii) higher pKa values for Zn-OH2, favoured the interconversion of HCO3- to CO2, iii) Zn(II) was shown to have the highest catalytic rate for HCO3- dehydration, which was attributed to the weaker binding of HCO3- to Zn(II) than to Cu(II), Co(II) and Ni(II). Additionally, this thesis provides the first proof of concept data for the use of chemical tools that could help towards mitigating the loss of Rubisco’s inefficiencies. Zn(II) mimetics were shown to alter Rubisco’s activity, which was attributed to a change in local CO2 concentrations, following the addition of the mimetics.Open Acces

A novel method for the analysis of 5-aminoimidazole-4-carboxamide-1-ß-D-ribofuranoside (AICAR) in urine by isotope ratio mass spectrometry for anti-doping purposes

In the last 20 years, isotopic ratio mass spectrometry coupled with gas chromatography (GC/C/IRMS) applied to carbon stable isotope (13C/12C) ratios (CSIR) has been a fundamental tool in the field of anti-doping analysis. Some compounds, such as testosterone, can be found in human urine as the result of natural metabolism or exogenous intake, sometimes leaving its carbon isotopic signature as the only proof of an antidoping violation. More recently, the appearance of a new non-steroidal compound named 5-aminoimidazole-4-carboxamide-1-ß-D-ribofuranoside (AICAR) has been of major concern. Experiments made on mice, combined with rumors in the world of sport, has made the compound a suspect for anti-doping authorities. As an intermediate in the purine synthesis, AICAR is also present in urine. The development of a GC/C/IRMS method to distinguish between natural and synthetic AICAR therefore appears necessary, but is not done without issues as AICAR is a non-volatile and unstable molecule at high temperatures. Existing methods use trimethylsilyl (TMS) derivatization, which damages combustion furnaces and adds 9 carbon atoms to the AICAR molecule. This work therefore proposes a new GC/C/IRMS method that uses acetylation as an alternative route to analyze the CSIR of AICAR for anti-doping purposes. The different issues encountered when developing such method are described as well as the data obtained from its validation and from the analysis of 46 urines samples. A comparison of the results from this work with the existing literature is also made. The results suggest that the use of CSIR to determine the origin of AICAR in urine is more complex than previously reported

Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)

This work was supported by the National Institute of General Medical Sciences [GM131919].In 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Thus, it is important to formulate on a regular basis updated guidelines for monitoring autophagy in different organisms. Despite numerous reviews, there continues to be confusion regarding acceptable methods to evaluate autophagy, especially in multicellular eukaryotes. Here, we present a set of guidelines for investigators to select and interpret methods to examine autophagy and related processes, and for reviewers to provide realistic and reasonable critiques of reports that are focused on these processes. These guidelines are not meant to be a dogmatic set of rules, because the appropriateness of any assay largely depends on the question being asked and the system being used. Moreover, no individual assay is perfect for every situation, calling for the use of multiple techniques to properly monitor autophagy in each experimental setting. Finally, several core components of the autophagy machinery have been implicated in distinct autophagic processes (canonical and noncanonical autophagy), implying that genetic approaches to block autophagy should rely on targeting two or more autophagy-related genes that ideally participate in distinct steps of the pathway. Along similar lines, because multiple proteins involved in autophagy also regulate other cellular pathways including apoptosis, not all of them can be used as a specific marker for bona fide autophagic responses. Here, we critically discuss current methods of assessing autophagy and the information they can, or cannot, provide. Our ultimate goal is to encourage intellectual and technical innovation in the field.PostprintPeer reviewe

Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)1.

In 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Thus, it is important to formulate on a regular basis updated guidelines for monitoring autophagy in different organisms. Despite numerous reviews, there continues to be confusion regarding acceptable methods to evaluate autophagy, especially in multicellular eukaryotes. Here, we present a set of guidelines for investigators to select and interpret methods to examine autophagy and related processes, and for reviewers to provide realistic and reasonable critiques of reports that are focused on these processes. These guidelines are not meant to be a dogmatic set of rules, because the appropriateness of any assay largely depends on the question being asked and the system being used. Moreover, no individual assay is perfect for every situation, calling for the use of multiple techniques to properly monitor autophagy in each experimental setting. Finally, several core components of the autophagy machinery have been implicated in distinct autophagic processes (canonical and noncanonical autophagy), implying that genetic approaches to block autophagy should rely on targeting two or more autophagy-related genes that ideally participate in distinct steps of the pathway. Along similar lines, because multiple proteins involved in autophagy also regulate other cellular pathways including apoptosis, not all of them can be used as a specific marker for bona fide autophagic responses. Here, we critically discuss current methods of assessing autophagy and the information they can, or cannot, provide. Our ultimate goal is to encourage intellectual and technical innovation in the field

Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)

none2929sìIn 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Thus, it is important to formulate on a regular basis updated guidelines for monitoring autophagy in different organisms. Despite numerous reviews, there continues to be confusion regarding acceptable methods to evaluate autophagy, especially in multicellular eukaryotes. Here, we present a set of guidelines for investigators to select and interpret methods to examine autophagy and related processes, and for reviewers to provide realistic and reasonable critiques of reports that are focused on these processes. These guidelines are not meant to be a dogmatic set of rules, because the appropriateness of any assay largely depends on the question being asked and the system being used. Moreover, no individual assay is perfect for every situation, calling for the use of multiple techniques to properly monitor autophagy in each experimental setting. Finally, several core components of the autophagy machinery have been implicated in distinct autophagic processes (canonical and noncanonical autophagy), implying that genetic approaches to block autophagy should rely on targeting two or more autophagy-related genes that ideally participate in distinct steps of the pathway. Along similar lines, because multiple proteins involved in autophagy also regulate other cellular pathways including apoptosis, not all of them can be used as a specific marker for bona fide autophagic responses. Here, we critically discuss current methods of assessing autophagy and the information they can, or cannot, provide. Our ultimate goal is to encourage intellectual and technical innovation in the field.openKlionsky, Daniel J; Abdel-Aziz, Amal Kamal; Abdelfatah, Sara; Abdellatif, Mahmoud; Abdoli, Asghar; Abel, Steffen; Abeliovich, Hagai; Abildgaard, Marie H; Abudu, Yakubu Princely; Acevedo-Arozena, Abraham; Adamopoulos, Iannis E; Adeli, Khosrow; Adolph, Timon E; Adornetto, Annagrazia; Aflaki, Elma; Agam, Galila; Agarwal, Anupam; Aggarwal, Bharat B; Agnello, Maria; Agostinis, Patrizia; Agrewala, Javed N; Agrotis, Alexander; Aguilar, Patricia V; Ahmad, S Tariq; Ahmed, Zubair M; Ahumada-Castro, Ulises; Aits, Sonja; Aizawa, Shu; Akkoc, Yunus; Akoumianaki, Tonia; Akpinar, Hafize Aysin; Al-Abd, Ahmed M; Al-Akra, Lina; Al-Gharaibeh, Abeer; Alaoui-Jamali, Moulay A; Alberti, Simon; Alcocer-Gómez, Elísabet; Alessandri, Cristiano; Ali, Muhammad; Alim Al-Bari, M Abdul; Aliwaini, Saeb; Alizadeh, Javad; Almacellas, Eugènia; Almasan, Alexandru; Alonso, Alicia; Alonso, Guillermo D; Altan-Bonnet, Nihal; Altieri, Dario C; Álvarez, Élida M C; Alves, Sara; Alves da Costa, Cristine; Alzaharna, Mazen M; Amadio, Marialaura; Amantini, Consuelo; Amaral, Cristina; Ambrosio, Susanna; Amer, Amal O; Ammanathan, Veena; An, Zhenyi; Andersen, Stig U; Andrabi, Shaida A; Andrade-Silva, Magaiver; Andres, Allen M; Angelini, Sabrina; Ann, David; Anozie, Uche C; Ansari, Mohammad Y; Antas, Pedro; Antebi, Adam; Antón, Zuriñe; Anwar, Tahira; Apetoh, Lionel; Apostolova, Nadezda; Araki, Toshiyuki; Araki, Yasuhiro; Arasaki, Kohei; Araújo, Wagner L; Araya, Jun; Arden, Catherine; Arévalo, Maria-Angeles; Arguelles, Sandro; Arias, Esperanza; Arikkath, Jyothi; Arimoto, Hirokazu; Ariosa, Aileen R; Armstrong-James, Darius; Arnauné-Pelloquin, Laetitia; Aroca, Angeles; Arroyo, Daniela S; Arsov, Ivica; Artero, Rubén; Asaro, Dalia Maria Lucia; Aschner, Michael; Ashrafizadeh, Milad; Ashur-Fabian, Osnat; Atanasov, Atanas G; Au, Alicia K; Auberger, Patrick; Auner, Holger W; Aurelian, Laure; Autelli, Riccardo; Avagliano, Laura; Ávalos, Yenniffer; Aveic, Sanja; Aveleira, Célia Alexandra; Avin-Wittenberg, Tamar; Aydin, Yucel; Ayton, Scott; Ayyadevara, Srinivas; Azzopardi, Maria; Baba, Misuzu; Backer, Jonathan M; Backues, Steven K; Bae, Dong-Hun; Bae, Ok-Nam; Bae, Soo Han; Baehrecke, Eric H; Baek, Ahruem; Baek, Seung-Hoon; Baek, Sung Hee; Bagetta, Giacinto; Bagniewska-Zadworna, Agnieszka; Bai, Hua; Bai, Jie; Bai, Xiyuan; Bai, Yidong; Bairagi, Nandadulal; Baksi, Shounak; Balbi, Teresa; Baldari, Cosima T; Balduini, Walter; Ballabio, Andrea; Ballester, Maria; Balazadeh, Salma; Balzan, Rena; Bandopadhyay, Rina; Banerjee, Sreeparna; Banerjee, Sulagna; Bánréti, Ágnes; Bao, Yan; Baptista, Mauricio S; Baracca, Alessandra; Barbati, Cristiana; Bargiela, Ariadna; Barilà, Daniela; Barlow, Peter G; Barmada, Sami J; Barreiro, Esther; Barreto, George E; Bartek, Jiri; Bartel, Bonnie; Bartolome, Alberto; Barve, Gaurav R; Basagoudanavar, Suresh H; Bassham, Diane C; Bast, Robert C; Basu, Alakananda; Batoko, Henri; Batten, Isabella; Baulieu, Etienne E; Baumgarner, Bradley L; Bayry, Jagadeesh; Beale, Rupert; Beau, Isabelle; Beaumatin, Florian; Bechara, Luiz R G; Beck, George R; Beers, Michael F; Begun, Jakob; Behrends, Christian; Behrens, Georg M N; Bei, Roberto; Bejarano, Eloy; Bel, Shai; Behl, Christian; Belaid, Amine; Belgareh-Touzé, Naïma; Bellarosa, Cristina; Belleudi, Francesca; Belló Pérez, Melissa; Bello-Morales, Raquel; Beltran, Jackeline Soares de Oliveira; Beltran, Sebastián; Benbrook, Doris Mangiaracina; Bendorius, Mykolas; Benitez, Bruno A; Benito-Cuesta, Irene; Bensalem, Julien; Berchtold, Martin W; Berezowska, Sabina; Bergamaschi, Daniele; Bergami, Matteo; Bergmann, Andreas; Berliocchi, Laura; Berlioz-Torrent, Clarisse; Bernard, Amélie; Berthoux, Lionel; Besirli, Cagri G; Besteiro, Sebastien; Betin, Virginie M; Beyaert, Rudi; Bezbradica, Jelena S; Bhaskar, Kiran; Bhatia-Kissova, Ingrid; Bhattacharya, Resham; Bhattacharya, Sujoy; Bhattacharyya, Shalmoli; Bhuiyan, Md Shenuarin; Bhutia, Sujit Kumar; Bi, Lanrong; Bi, Xiaolin; Biden, Trevor J; Bijian, Krikor; Billes, Viktor A; Binart, Nadine; Bincoletto, Claudia; Birgisdottir, Asa B; Bjorkoy, Geir; Blanco, Gonzalo; Blas-Garcia, Ana; Blasiak, Janusz; Blomgran, Robert; Blomgren, Klas; Blum, Janice S; Boada-Romero, Emilio; Boban, Mirta; Boesze-Battaglia, Kathleen; Boeuf, Philippe; Boland, Barry; Bomont, Pascale; Bonaldo, Paolo; Bonam, Srinivasa Reddy; Bonfili, Laura; Bonifacino, Juan S; Boone, Brian A; Bootman, Martin D; Bordi, Matteo; Borner, Christoph; Bornhauser, Beat C; Borthakur, Gautam; Bosch, Jürgen; Bose, Santanu; Botana, Luis M; Botas, Juan; Boulanger, Chantal M; Boulton, Michael E; Bourdenx, Mathieu; Bourgeois, Benjamin; Bourke, Nollaig M; Bousquet, Guilhem; Boya, Patricia; Bozhkov, Peter V; Bozi, Luiz H M; Bozkurt, Tolga O; Brackney, Doug E; Brandts, Christian H; Braun, Ralf J; Braus, Gerhard H; Bravo-Sagua, Roberto; Bravo-San Pedro, José M; Brest, Patrick; Bringer, Marie-Agnès; Briones-Herrera, Alfredo; Broaddus, V Courtney; Brodersen, Peter; Brodsky, Jeffrey L; Brody, Steven L; Bronson, Paola G; Bronstein, Jeff M; Brown, Carolyn N; Brown, Rhoderick E; Brum, Patricia C; Brumell, John H; Brunetti-Pierri, Nicola; Bruno, Daniele; Bryson-Richardson, Robert J; Bucci, Cecilia; Buchrieser, Carmen; Bueno, Marta; Buitrago-Molina, Laura Elisa; Buraschi, Simone; Buch, Shilpa; Buchan, J Ross; Buckingham, Erin M; Budak, Hikmet; Budini, Mauricio; Bultynck, Geert; Burada, Florin; Burgoyne, Joseph R; Burón, M Isabel; Bustos, Victor; Büttner, Sabrina; Butturini, Elena; Byrd, Aaron; Cabas, Isabel; Cabrera-Benitez, Sandra; Cadwell, Ken; Cai, Jingjing; Cai, Lu; Cai, Qian; Cairó, Montserrat; Calbet, Jose A; Caldwell, Guy A; Caldwell, Kim A; Call, Jarrod A; Calvani, Riccardo; Calvo, Ana C; Calvo-Rubio Barrera, Miguel; Camara, Niels Os; Camonis, Jacques H; Camougrand, Nadine; Campanella, Michelangelo; Campbell, Edward M; Campbell-Valois, François-Xavier; Campello, Silvia; Campesi, Ilaria; Campos, Juliane C; Camuzard, Olivier; Cancino, Jorge; Candido de Almeida, Danilo; Canesi, Laura; Caniggia, Isabella; Canonico, Barbara; Cantí, Carles; Cao, Bin; Caraglia, Michele; Caramés, Beatriz; Carchman, Evie H; Cardenal-Muñoz, Elena; Cardenas, Cesar; Cardenas, Luis; Cardoso, Sandra M; Carew, Jennifer S; Carle, Georges F; Carleton, Gillian; Carloni, Silvia; Carmona-Gutierrez, Didac; Carneiro, Leticia A; Carnevali, Oliana; Carosi, Julian M; Carra, Serena; Carrier, Alice; Carrier, Lucie; Carroll, Bernadette; Carter, A Brent; Carvalho, Andreia Neves; Casanova, Magali; Casas, Caty; Casas, Josefina; Cassioli, Chiara; Castillo, Eliseo F; Castillo, Karen; Castillo-Lluva, Sonia; Castoldi, Francesca; Castori, Marco; Castro, Ariel F; Castro-Caldas, Margarida; Castro-Hernandez, Javier; Castro-Obregon, Susana; Catz, Sergio D; Cavadas, Claudia; Cavaliere, Federica; Cavallini, Gabriella; Cavinato, Maria; Cayuela, Maria L; Cebollada Rica, Paula; Cecarini, Valentina; Cecconi, Francesco; Cechowska-Pasko, Marzanna; Cenci, Simone; Ceperuelo-Mallafré, Victòria; Cerqueira, João J; Cerutti, Janete M; Cervia, Davide; Cetintas, Vildan Bozok; Cetrullo, Silvia; Chae, Han-Jung; Chagin, Andrei S; Chai, Chee-Yin; Chakrabarti, Gopal; Chakrabarti, Oishee; Chakraborty, Tapas; Chakraborty, Trinad; Chami, Mounia; Chamilos, Georgios; Chan, David W; Chan, Edmond Y W; Chan, Edward D; Chan, H Y Edwin; Chan, Helen H; Chan, Hung; Chan, Matthew T V; Chan, Yau Sang; Chandra, Partha K; Chang, Chih-Peng; Chang, Chunmei; Chang, Hao-Chun; Chang, Kai; Chao, Jie; Chapman, Tracey; Charlet-Berguerand, Nicolas; Chatterjee, Samrat; Chaube, Shail K; Chaudhary, Anu; Chauhan, Santosh; Chaum, Edward; Checler, Frédéric; Cheetham, Michael E; Chen, Chang-Shi; Chen, Guang-Chao; Chen, Jian-Fu; Chen, Liam L; Chen, Leilei; Chen, Lin; Chen, Mingliang; Chen, Mu-Kuan; Chen, Ning; Chen, Quan; Chen, Ruey-Hwa; Chen, Shi; Chen, Wei; Chen, Weiqiang; Chen, Xin-Ming; Chen, Xiong-Wen; Chen, Xu; Chen, Yan; Chen, Ye-Guang; Chen, Yingyu; Chen, Yongqiang; Chen, Yu-Jen; Chen, Yue-Qin; Chen, Zhefan Stephen; Chen, Zhi; Chen, Zhi-Hua; Chen, Zhijian J; Chen, Zhixiang; Cheng, Hanhua; Cheng, Jun; Cheng, Shi-Yuan; Cheng, Wei; Cheng, Xiaodong; Cheng, Xiu-Tang; Cheng, Yiyun; Cheng, Zhiyong; Chen, Zhong; Cheong, Heesun; Cheong, Jit Kong; Chernyak, Boris V; Cherry, Sara; Cheung, Chi Fai Randy; Cheung, Chun Hei Antonio; Cheung, King-Ho; Chevet, Eric; Chi, Richard J; Chiang, Alan Kwok Shing; Chiaradonna, Ferdinando; Chiarelli, Roberto; Chiariello, Mario; Chica, Nathalia; Chiocca, Susanna; Chiong, Mario; Chiou, Shih-Hwa; Chiramel, Abhilash I; Chiurchiù, Valerio; Cho, Dong-Hyung; Choe, Seong-Kyu; Choi, Augustine M K; Choi, Mary E; Choudhury, Kamalika Roy; Chow, Norman S; Chu, Charleen T; Chua, Jason P; Chua, John Jia En; Chung, Hyewon; Chung, Kin Pan; Chung, Seockhoon; Chung, So-Hyang; Chung, Yuen-Li; Cianfanelli, Valentina; Ciechomska, Iwona A; Cifuentes, Mariana; Cinque, Laura; Cirak, Sebahattin; Cirone, Mara; Clague, Michael J; Clarke, Robert; Clementi, Emilio; Coccia, Eliana M; Codogno, Patrice; Cohen, Ehud; Cohen, Mickael M; Colasanti, Tania; Colasuonno, Fiorella; Colbert, Robert A; Colell, Anna; Čolić, Miodrag; Coll, Nuria S; Collins, Mark O; Colombo, María I; Colón-Ramos, Daniel A; Combaret, Lydie; Comincini, Sergio; Cominetti, Márcia R; Consiglio, Antonella; Conte, Andrea; Conti, Fabrizio; Contu, Viorica Raluca; Cookson, Mark R; Coombs, Kevin M; Coppens, Isabelle; Corasaniti, Maria Tiziana; Corkery, Dale P; Cordes, Nils; Cortese, Katia; Costa, Maria do Carmo; Costantino, Sarah; Costelli, Paola; Coto-Montes, Ana; Crack, Peter J; Crespo, Jose L; Criollo, Alfredo; Crippa, Valeria; Cristofani, Riccardo; Csizmadia, Tamas; Cuadrado, Antonio; Cui, Bing; Cui, Jun; Cui, Yixian; Cui, Yong; Culetto, Emmanuel; Cumino, Andrea C; Cybulsky, Andrey V; Czaja, Mark J; Czuczwar, Stanislaw J; D'Adamo, Stefania; D'Amelio, Marcello; D'Arcangelo, Daniela; D'Lugos, Andrew C; D'Orazi, Gabriella; da Silva, James A; Dafsari, Hormos Salimi; Dagda, Ruben K; Dagdas, Yasin; Daglia, Maria; Dai, Xiaoxia; Dai, Yun; Dai, Yuyuan; Dal Col, Jessica; Dalhaimer, Paul; Dalla Valle, Luisa; Dallenga, Tobias; Dalmasso, Guillaume; Damme, Markus; Dando, Ilaria; Dantuma, Nico P; Darling, April L; Das, Hiranmoy; Dasarathy, Srinivasan; Dasari, Santosh K; Dash, Srikanta; Daumke, Oliver; Dauphinee, Adrian N; Davies, Jeffrey S; Dávila, Valeria A; Davis, Roger J; Davis, Tanja; Dayalan Naidu, Sharadha; De Amicis, Francesca; De Bosscher, Karolien; De Felice, Francesca; De Franceschi, Lucia; De Leonibus, Chiara; de Mattos Barbosa, Mayara G; De Meyer, Guido R Y; De Milito, Angelo; De Nunzio, Cosimo; De Palma, Clara; De Santi, Mauro; De Virgilio, Claudio; De Zio, Daniela; Debnath, Jayanta; DeBosch, Brian J; Decuypere, Jean-Paul; Deehan, Mark A; Deflorian, Gianluca; DeGregori, James; Dehay, Benjamin; Del Rio, Gabriel; Delaney, Joe R; Delbridge, Lea M D; Delorme-Axford, Elizabeth; Delpino, M Victoria; Demarchi, Francesca; Dembitz, Vilma; Demers, Nicholas D; Deng, Hongbin; Deng, Zhiqiang; Dengjel, Joern; Dent, Paul; Denton, Donna; DePamphilis, Melvin L; Der, Channing J; Deretic, Vojo; Descoteaux, Albert; Devis, Laura; Devkota, Sushil; Devuyst, Olivier; Dewson, Grant; Dharmasivam, Mahendiran; Dhiman, Rohan; di Bernardo, Diego; Di Cristina, Manlio; Di Domenico, Fabio; Di Fazio, Pietro; Di Fonzo, Alessio; Di Guardo, Giovanni; Di Guglielmo, Gianni M; Di Leo, Luca; Di Malta, Chiara; Di Nardo, Alessia; Di Rienzo, Martina; Di Sano, Federica; Diallinas, George; Diao, Jiajie; Diaz-Araya, Guillermo; Díaz-Laviada, Inés; Dickinson, Jared M; Diederich, Marc; Dieudé, Mélanie; Dikic, Ivan; Ding, Shiping; Ding, Wen-Xing; Dini, Luciana; Dinić, Jelena; Dinic, Miroslav; Dinkova-Kostova, Albena T; Dionne, Marc S; Distler, Jörg H W; Diwan, Abhinav; Dixon, Ian M C; Djavaheri-Mergny, Mojgan; Dobrinski, Ina; Dobrovinskaya, Oxana; Dobrowolski, Radek; Dobson, Renwick C J; Đokić, Jelena; Dokmeci Emre, Serap; Donadelli, Massimo; Dong, Bo; Dong, Xiaonan; Dong, Zhiwu; Dorn Ii, Gerald W; Dotsch, Volker; Dou, Huan; Dou, Juan; Dowaidar, Moataz; Dridi, Sami; Drucker, Liat; Du, Ailian; Du, Caigan; Du, Guangwei; Du, Hai-Ning; Du, Li-Lin; du Toit, André; Duan, Shao-Bin; Duan, Xiaoqiong; Duarte, Sónia P; Dubrovska, Anna; Dunlop, Elaine A; Dupont, Nicolas; Durán, Raúl V; Dwarakanath, Bilikere S; Dyshlovoy, Sergey A; Ebrahimi-Fakhari, Darius; Eckhart, Leopold; Edelstein, Charles L; Efferth, Thomas; Eftekharpour, Eftekhar; Eichinger, Ludwig; Eid, Nabil; Eisenberg, Tobias; Eissa, N Tony; Eissa, Sanaa; Ejarque, Miriam; El Andaloussi, Abdeljabar; El-Hage, Nazira; El-Naggar, Shahenda; Eleuteri, Anna Maria; El-Shafey, Eman S; Elgendy, Mohamed; Eliopoulos, Aristides G; Elizalde, María M; Elks, Philip M; Elsasser, Hans-Peter; Elsherbiny, Eslam S; Emerling, Brooke M; Emre, N C Tolga; Eng, Christina H; Engedal, Nikolai; Engelbrecht, Anna-Mart; Engelsen, Agnete S T; Enserink, Jorrit M; Escalante, Ricardo; Esclatine, Audrey; Escobar-Henriques, Mafalda; Eskelinen, Eeva-Liisa; Espert, Lucile; Eusebio, Makandjou-Ola; Fabrias, Gemma; Fabrizi, Cinzia; Facchiano, Antonio; Facchiano, Francesco; Fadeel, Bengt; Fader, Claudio; Faesen, Alex C; Fairlie, W Douglas; Falcó, Alberto; Falkenburger, Bjorn H; Fan, Daping; Fan, Jie; Fan, Yanbo; Fang, Evandro F; Fang, Yanshan; Fang, Yognqi; Fanto, Manolis; Farfel-Becker, Tamar; Faure, Mathias; Fazeli, Gholamreza; Fedele, Anthony O; Feldman, Arthur M; Feng, Du; Feng, Jiachun; Feng, Lifeng; Feng, Yibin; Feng, Yuchen; Feng, Wei; Fenz Araujo, Thais; Ferguson, Thomas A; Fernández, Álvaro F; Fernandez-Checa, Jose C; Fernández-Veledo, Sonia; Fernie, Alisdair R; Ferrante, Anthony W; Ferraresi, Alessandra; Ferrari, Merari F; Ferreira, Julio C B; Ferro-Novick, Susan; Figueras, Antonio; Filadi, Riccardo; Filigheddu, Nicoletta; Filippi-Chiela, Eduardo; Filomeni, Giuseppe; Fimia, Gian Maria; Fineschi, Vittorio; Finetti, Francesca; Finkbeiner, Steven; Fisher, Edward A; Fisher, Paul B; Flamigni, Flavio; Fliesler, Steven J; Flo, Trude H; Florance, Ida; Florey, Oliver; Florio, Tullio; Fodor, Erika; Follo, Carlo; Fon, Edward A; Forlino, Antonella; Fornai, Francesco; Fortini, Paola; Fracassi, Anna; Fraldi, Alessandro; Franco, Brunella; Franco, Rodrigo; Franconi, Flavia; Frankel, Lisa B; Friedman, Scott L; Fröhlich, Leopold F; Frühbeck, Gema; Fuentes, Jose M; Fujiki, Yukio; Fujita, Naonobu; Fujiwara, Yuuki; Fukuda, Mitsunori; Fulda, Simone; Furic, Luc; Furuya, Norihiko; Fusco, Carmela; Gack, Michaela U; Gaffke, Lidia; Galadari, Sehamuddin; Galasso, Alessia; Galindo, Maria F; Gallolu Kankanamalage, Sachith; Galluzzi, Lorenzo; Galy, Vincent; Gammoh, Noor; Gan, Boyi; Ganley, Ian G; Gao, Feng; Gao, Hui; Gao, Minghui; Gao, Ping; Gao, Shou-Jiang; Gao, Wentao; Gao, Xiaobo; Garcera, Ana; Garcia, Maria Noé; Garcia, Verónica E; García-Del Portillo, Francisco; Garcia-Escudero, Vega; Garcia-Garcia, Aracely; Garcia-Macia, Marina; García-Moreno, Diana; Garcia-Ruiz, Carmen; García-Sanz, Patricia; Garg, Abhishek D; Gargini, Ricardo; Garofalo, Tina; Garry, Robert F; Gassen, Nils C; Gatica, Damian; Ge, Liang; Ge, Wanzhong; Geiss-Friedlander, Ruth; Gelfi, Cecilia; Genschik, Pascal; Gentle, Ian E; Gerbino, Valeria; Gerhardt, Christoph; Germain, Kyla; Germain, Marc; Gewirtz, David A; Ghasemipour Afshar, Elham; Ghavami, Saeid; Ghigo, Alessandra; Ghosh, Manosij; Giamas, Georgios; Giampietri, Claudia; Giatromanolaki, Alexandra; Gibson, Gary E; Gibson, Spencer B; Ginet, Vanessa; Giniger, Edward; Giorgi, Carlotta; Girao, Henrique; Girardin, Stephen E; Giridharan, Mridhula; Giuliano, Sandy; Giulivi, Cecilia; Giuriato, Sylvie; Giustiniani, Julien; Gluschko, Alexander; Goder, Veit; Goginashvili, Alexander; Golab, Jakub; Goldstone, David C; Golebiewska, Anna; Gomes, Luciana R; Gomez, Rodrigo; Gómez-Sánchez, Rubén; Gomez-Puerto, Maria Catalina; Gomez-Sintes, Raquel; Gong, Qingqiu; Goni, Felix M; González-Gallego, Javier; Gonzalez-Hernandez, Tomas; Gonzalez-Polo, Rosa A; Gonzalez-Reyes, Jose A; González-Rodríguez, Patricia; Goping, Ing Swie; Gorbatyuk, Marina S; Gorbunov, Nikolai V; Görgülü, Kıvanç; Gorojod, Roxana M; Gorski, Sharon M; Goruppi, Sandro; Gotor, Cecilia; Gottlieb, Roberta A; Gozes, Illana; Gozuacik, Devrim; Graef, Martin; Gräler, Markus H; Granatiero, Veronica; Grasso, Daniel; Gray, Joshua P; Green, Douglas R; Greenhough, Alexander; Gregory, Stephen L; Griffin, Edward F; Grinstaff, Mark W; Gros, Frederic; Grose, Charles; Gross, Angelina S; Gruber, Florian; Grumati, Paolo; Grune, Tilman; Gu, Xueyan; Guan, Jun-Lin; Guardia, Carlos M; Guda, Kishore; Guerra, Flora; Guerri, Consuelo; Guha, Prasun; Guillén, Carlos; Gujar, Shashi; Gukovskaya, Anna; Gukovsky, Ilya; Gunst, Jan; Günther, Andreas; Guntur, Anyonya R; Guo, Chuanyong; Guo, Chun; Guo, Hongqing; Guo, Lian-Wang; Guo, Ming; Gupta, Pawan; Gupta, Shashi Kumar; Gupta, Swapnil; Gupta, Veer Bala; Gupta, Vivek; Gustafsson, Asa B; Gutterman, David D; H B, Ranjitha; Haapasalo, Annakaisa; Haber, James E; Hać, Aleksandra; Hadano, Shinji; Hafrén, Anders J; Haidar, Mansour; Hall, Belinda S; Halldén, Gunnel; Hamacher-Brady, Anne; Hamann, Andrea; Hamasaki, Maho; Han, Weidong; Hansen, Malene; Hanson, Phyllis I; Hao, Zijian; 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Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)

none2929siIn 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Thus, it is important to formulate on a regular basis updated guidelines for monitoring autophagy in different organisms. Despite numerous reviews, there continues to be confusion regarding acceptable methods to evaluate autophagy, especially in multicellular eukaryotes. Here, we present a set of guidelines for investigators to select and interpret methods to examine autophagy and related processes, and for reviewers to provide realistic and reasonable critiques of reports that are focused on these processes. These guidelines are not meant to be a dogmatic set of rules, because the appropriateness of any assay largely depends on the question being asked and the system being used. Moreover, no individual assay is perfect for every situation, calling for the use of multiple techniques to properly monitor autophagy in each experimental setting. Finally, several core components of the autophagy machinery have been implicated in distinct autophagic processes (canonical and noncanonical autophagy), implying that genetic approaches to block autophagy should rely on targeting two or more autophagy-related genes that ideally participate in distinct steps of the pathway. Along similar lines, because multiple proteins involved in autophagy also regulate other cellular pathways including apoptosis, not all of them can be used as a specific marker for bona fide autophagic responses. Here, we critically discuss current methods of assessing autophagy and the information they can, or cannot, provide. Our ultimate goal is to encourage intellectual and technical innovation in the field.openKlionsky, Daniel J; Abdel-Aziz, Amal Kamal; Abdelfatah, Sara; Abdellatif, Mahmoud; Abdoli, Asghar; Abel, Steffen; Abeliovich, Hagai; Abildgaard, Marie H; Abudu, Yakubu Princely; Acevedo-Arozena, Abraham; Adamopoulos, Iannis E; Adeli, Khosrow; Adolph, Timon E; Adornetto, Annagrazia; Aflaki, Elma; Agam, Galila; Agarwal, Anupam; Aggarwal, Bharat B; Agnello, Maria; Agostinis, Patrizia; Agrewala, Javed N; Agrotis, Alexander; Aguilar, Patricia V; Ahmad, S Tariq; Ahmed, Zubair M; Ahumada-Castro, Ulises; Aits, Sonja; Aizawa, Shu; Akkoc, Yunus; Akoumianaki, Tonia; Akpinar, Hafize Aysin; Al-Abd, Ahmed M; Al-Akra, Lina; Al-Gharaibeh, Abeer; Alaoui-Jamali, Moulay A; Alberti, Simon; Alcocer-Gómez, Elísabet; Alessandri, Cristiano; Ali, Muhammad; Alim Al-Bari, M Abdul; Aliwaini, Saeb; Alizadeh, Javad; Almacellas, Eugènia; Almasan, Alexandru; Alonso, Alicia; Alonso, Guillermo D; Altan-Bonnet, Nihal; Altieri, Dario C; Álvarez, Élida M C; Alves, Sara; Alves da Costa, Cristine; Alzaharna, Mazen M; Amadio, Marialaura; Amantini, Consuelo; Amaral, Cristina; Ambrosio, Susanna; Amer, Amal O; Ammanathan, Veena; An, Zhenyi; Andersen, Stig U; Andrabi, Shaida A; Andrade-Silva, Magaiver; Andres, Allen M; Angelini, Sabrina; Ann, David; Anozie, Uche C; Ansari, Mohammad Y; Antas, Pedro; Antebi, Adam; Antón, Zuriñe; Anwar, Tahira; Apetoh, Lionel; Apostolova, Nadezda; Araki, Toshiyuki; Araki, Yasuhiro; Arasaki, Kohei; Araújo, Wagner L; Araya, Jun; Arden, Catherine; Arévalo, Maria-Angeles; Arguelles, Sandro; Arias, Esperanza; Arikkath, Jyothi; Arimoto, Hirokazu; Ariosa, Aileen R; Armstrong-James, Darius; Arnauné-Pelloquin, Laetitia; Aroca, Angeles; Arroyo, Daniela S; Arsov, Ivica; Artero, Rubén; Asaro, Dalia Maria Lucia; Aschner, Michael; Ashrafizadeh, Milad; Ashur-Fabian, Osnat; Atanasov, Atanas G; Au, Alicia K; Auberger, Patrick; Auner, Holger W; Aurelian, Laure; Autelli, Riccardo; Avagliano, Laura; Ávalos, Yenniffer; Aveic, Sanja; Aveleira, Célia Alexandra; Avin-Wittenberg, Tamar; Aydin, Yucel; Ayton, Scott; Ayyadevara, Srinivas; Azzopardi, Maria; Baba, Misuzu; Backer, Jonathan M; Backues, Steven K; Bae, Dong-Hun; Bae, Ok-Nam; Bae, Soo Han; Baehrecke, Eric H; Baek, Ahruem; Baek, Seung-Hoon; Baek, Sung Hee; Bagetta, Giacinto; Bagniewska-Zadworna, Agnieszka; Bai, Hua; Bai, Jie; Bai, Xiyuan; Bai, Yidong; Bairagi, Nandadulal; Baksi, Shounak; Balbi, Teresa; Baldari, Cosima T; Balduini, Walter; Ballabio, Andrea; Ballester, Maria; Balazadeh, Salma; Balzan, Rena; Bandopadhyay, Rina; Banerjee, Sreeparna; Banerjee, Sulagna; Bánréti, Ágnes; Bao, Yan; Baptista, Mauricio S; Baracca, Alessandra; Barbati, Cristiana; Bargiela, Ariadna; Barilà, Daniela; Barlow, Peter G; Barmada, Sami J; Barreiro, Esther; Barreto, George E; Bartek, Jiri; Bartel, Bonnie; Bartolome, Alberto; Barve, Gaurav R; Basagoudanavar, Suresh H; Bassham, Diane C; Bast, Robert C; Basu, Alakananda; Batoko, Henri; Batten, Isabella; Baulieu, Etienne E; Baumgarner, Bradley L; Bayry, Jagadeesh; Beale, Rupert; Beau, Isabelle; Beaumatin, Florian; Bechara, Luiz R G; Beck, George R; Beers, Michael F; Begun, Jakob; Behrends, Christian; Behrens, Georg M N; Bei, Roberto; Bejarano, Eloy; Bel, Shai; Behl, Christian; Belaid, Amine; Belgareh-Touzé, Naïma; Bellarosa, Cristina; Belleudi, Francesca; Belló Pérez, Melissa; Bello-Morales, Raquel; Beltran, Jackeline Soares de Oliveira; Beltran, Sebastián; Benbrook, Doris Mangiaracina; Bendorius, Mykolas; Benitez, Bruno A; Benito-Cuesta, Irene; Bensalem, Julien; Berchtold, Martin W; Berezowska, Sabina; Bergamaschi, Daniele; Bergami, Matteo; Bergmann, Andreas; Berliocchi, Laura; Berlioz-Torrent, Clarisse; Bernard, Amélie; Berthoux, Lionel; Besirli, Cagri G; Besteiro, Sebastien; Betin, Virginie M; Beyaert, Rudi; Bezbradica, Jelena S; Bhaskar, Kiran; Bhatia-Kissova, Ingrid; Bhattacharya, Resham; Bhattacharya, Sujoy; Bhattacharyya, Shalmoli; Bhuiyan, Md Shenuarin; Bhutia, Sujit Kumar; Bi, Lanrong; Bi, Xiaolin; Biden, Trevor J; Bijian, Krikor; Billes, Viktor A; Binart, Nadine; Bincoletto, Claudia; Birgisdottir, Asa B; Bjorkoy, Geir; Blanco, Gonzalo; Blas-Garcia, Ana; Blasiak, Janusz; Blomgran, Robert; Blomgren, Klas; Blum, Janice S; Boada-Romero, Emilio; Boban, Mirta; Boesze-Battaglia, Kathleen; Boeuf, Philippe; Boland, Barry; Bomont, Pascale; Bonaldo, Paolo; Bonam, Srinivasa Reddy; Bonfili, Laura; Bonifacino, Juan S; Boone, Brian A; Bootman, Martin D; Bordi, Matteo; Borner, Christoph; Bornhauser, Beat C; Borthakur, Gautam; Bosch, Jürgen; Bose, Santanu; Botana, Luis M; Botas, Juan; Boulanger, Chantal M; Boulton, Michael E; Bourdenx, Mathieu; Bourgeois, Benjamin; Bourke, Nollaig M; Bousquet, Guilhem; Boya, Patricia; Bozhkov, Peter V; Bozi, Luiz H M; Bozkurt, Tolga O; Brackney, Doug E; Brandts, Christian H; Braun, Ralf J; Braus, Gerhard H; Bravo-Sagua, Roberto; Bravo-San Pedro, José M; Brest, Patrick; Bringer, Marie-Agnès; Briones-Herrera, Alfredo; Broaddus, V Courtney; Brodersen, Peter; Brodsky, Jeffrey L; Brody, Steven L; Bronson, Paola G; Bronstein, Jeff M; Brown, Carolyn N; Brown, Rhoderick E; Brum, Patricia C; Brumell, John H; Brunetti-Pierri, Nicola; Bruno, Daniele; Bryson-Richardson, Robert J; Bucci, Cecilia; Buchrieser, Carmen; Bueno, Marta; Buitrago-Molina, Laura Elisa; Buraschi, Simone; Buch, Shilpa; Buchan, J Ross; Buckingham, Erin M; Budak, Hikmet; Budini, Mauricio; Bultynck, Geert; Burada, Florin; Burgoyne, Joseph R; Burón, M Isabel; Bustos, Victor; Büttner, Sabrina; Butturini, Elena; Byrd, Aaron; Cabas, Isabel; Cabrera-Benitez, Sandra; Cadwell, Ken; Cai, Jingjing; Cai, Lu; Cai, Qian; Cairó, Montserrat; Calbet, Jose A; Caldwell, Guy A; Caldwell, Kim A; Call, Jarrod A; Calvani, Riccardo; Calvo, Ana C; Calvo-Rubio Barrera, Miguel; Camara, Niels Os; Camonis, Jacques H; Camougrand, Nadine; Campanella, Michelangelo; Campbell, Edward M; Campbell-Valois, François-Xavier; Campello, Silvia; Campesi, Ilaria; Campos, Juliane C; Camuzard, Olivier; Cancino, Jorge; Candido de Almeida, Danilo; Canesi, Laura; Caniggia, Isabella; Canonico, Barbara; Cantí, Carles; Cao, Bin; Caraglia, Michele; Caramés, Beatriz; Carchman, Evie H; Cardenal-Muñoz, Elena; Cardenas, Cesar; Cardenas, Luis; Cardoso, Sandra M; Carew, Jennifer S; Carle, Georges F; Carleton, Gillian; Carloni, Silvia; Carmona-Gutierrez, Didac; Carneiro, Leticia A; Carnevali, Oliana; Carosi, Julian M; Carra, Serena; Carrier, Alice; Carrier, Lucie; Carroll, Bernadette; Carter, A Brent; Carvalho, Andreia Neves; Casanova, Magali; Casas, Caty; Casas, Josefina; Cassioli, Chiara; Castillo, Eliseo F; Castillo, Karen; Castillo-Lluva, Sonia; Castoldi, Francesca; Castori, Marco; Castro, Ariel F; Castro-Caldas, Margarida; Castro-Hernandez, Javier; Castro-Obregon, Susana; Catz, Sergio D; Cavadas, Claudia; Cavaliere, Federica; Cavallini, Gabriella; Cavinato, Maria; Cayuela, Maria L; Cebollada Rica, Paula; Cecarini, Valentina; Cecconi, Francesco; Cechowska-Pasko, Marzanna; Cenci, Simone; Ceperuelo-Mallafré, Victòria; Cerqueira, João J; Cerutti, Janete M; Cervia, Davide; Cetintas, Vildan Bozok; Cetrullo, Silvia; Chae, Han-Jung; Chagin, Andrei S; Chai, Chee-Yin; Chakrabarti, Gopal; Chakrabarti, Oishee; Chakraborty, Tapas; Chakraborty, Trinad; Chami, Mounia; Chamilos, Georgios; Chan, David W; Chan, Edmond Y W; Chan, Edward D; Chan, H Y Edwin; Chan, Helen H; Chan, Hung; Chan, Matthew T V; Chan, Yau Sang; Chandra, Partha K; Chang, Chih-Peng; Chang, Chunmei; Chang, Hao-Chun; Chang, Kai; Chao, Jie; Chapman, Tracey; Charlet-Berguerand, Nicolas; Chatterjee, Samrat; Chaube, Shail K; Chaudhary, Anu; Chauhan, Santosh; Chaum, Edward; Checler, Frédéric; Cheetham, Michael E; Chen, Chang-Shi; Chen, Guang-Chao; Chen, Jian-Fu; Chen, Liam L; Chen, Leilei; Chen, Lin; Chen, Mingliang; Chen, Mu-Kuan; Chen, Ning; Chen, Quan; Chen, Ruey-Hwa; Chen, Shi; Chen, Wei; Chen, Weiqiang; Chen, Xin-Ming; Chen, Xiong-Wen; Chen, Xu; Chen, Yan; Chen, Ye-Guang; Chen, Yingyu; Chen, Yongqiang; Chen, Yu-Jen; Chen, Yue-Qin; Chen, Zhefan Stephen; Chen, Zhi; Chen, Zhi-Hua; Chen, Zhijian J; Chen, Zhixiang; Cheng, Hanhua; Cheng, Jun; Cheng, Shi-Yuan; Cheng, Wei; Cheng, Xiaodong; Cheng, Xiu-Tang; Cheng, Yiyun; Cheng, Zhiyong; Chen, Zhong; Cheong, Heesun; Cheong, Jit Kong; Chernyak, Boris V; Cherry, Sara; Cheung, Chi Fai Randy; Cheung, Chun Hei Antonio; Cheung, King-Ho; Chevet, Eric; Chi, Richard J; Chiang, Alan Kwok Shing; Chiaradonna, Ferdinando; Chiarelli, Roberto; Chiariello, Mario; Chica, Nathalia; Chiocca, Susanna; Chiong, Mario; Chiou, Shih-Hwa; Chiramel, Abhilash I; Chiurchiù, Valerio; Cho, Dong-Hyung; Choe, Seong-Kyu; Choi, Augustine M K; Choi, Mary E; Choudhury, Kamalika Roy; Chow, Norman S; Chu, Charleen T; Chua, Jason P; Chua, John Jia En; Chung, Hyewon; Chung, Kin Pan; Chung, Seockhoon; Chung, So-Hyang; Chung, Yuen-Li; Cianfanelli, Valentina; Ciechomska, Iwona A; Cifuentes, Mariana; Cinque, Laura; Cirak, Sebahattin; Cirone, Mara; Clague, Michael J; Clarke, Robert; Clementi, Emilio; Coccia, Eliana M; Codogno, Patrice; Cohen, Ehud; Cohen, Mickael M; Colasanti, Tania; 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Dalla Valle, Luisa; Dallenga, Tobias; Dalmasso, Guillaume; Damme, Markus; Dando, Ilaria; Dantuma, Nico P; Darling, April L; Das, Hiranmoy; Dasarathy, Srinivasan; Dasari, Santosh K; Dash, Srikanta; Daumke, Oliver; Dauphinee, Adrian N; Davies, Jeffrey S; Dávila, Valeria A; Davis, Roger J; Davis, Tanja; Dayalan Naidu, Sharadha; De Amicis, Francesca; De Bosscher, Karolien; De Felice, Francesca; De Franceschi, Lucia; De Leonibus, Chiara; de Mattos Barbosa, Mayara G; De Meyer, Guido R Y; De Milito, Angelo; De Nunzio, Cosimo; De Palma, Clara; De Santi, Mauro; De Virgilio, Claudio; De Zio, Daniela; Debnath, Jayanta; DeBosch, Brian J; Decuypere, Jean-Paul; Deehan, Mark A; Deflorian, Gianluca; DeGregori, James; Dehay, Benjamin; Del Rio, Gabriel; Delaney, Joe R; Delbridge, Lea M D; Delorme-Axford, Elizabeth; Delpino, M Victoria; Demarchi, Francesca; Dembitz, Vilma; Demers, Nicholas D; Deng, Hongbin; Deng, Zhiqiang; Dengjel, Joern; Dent, Paul; Denton, Donna; DePamphilis, Melvin L; Der, Channing J; 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Du, Caigan; Du, Guangwei; Du, Hai-Ning; Du, Li-Lin; du Toit, André; Duan, Shao-Bin; Duan, Xiaoqiong; Duarte, Sónia P; Dubrovska, Anna; Dunlop, Elaine A; Dupont, Nicolas; Durán, Raúl V; Dwarakanath, Bilikere S; Dyshlovoy, Sergey A; Ebrahimi-Fakhari, Darius; Eckhart, Leopold; Edelstein, Charles L; Efferth, Thomas; Eftekharpour, Eftekhar; Eichinger, Ludwig; Eid, Nabil; Eisenberg, Tobias; Eissa, N Tony; Eissa, Sanaa; Ejarque, Miriam; El Andaloussi, Abdeljabar; El-Hage, Nazira; El-Naggar, Shahenda; Eleuteri, Anna Maria; El-Shafey, Eman S; Elgendy, Mohamed; Eliopoulos, Aristides G; Elizalde, María M; Elks, Philip M; Elsasser, Hans-Peter; Elsherbiny, Eslam S; Emerling, Brooke M; Emre, N C Tolga; Eng, Christina H; Engedal, Nikolai; Engelbrecht, Anna-Mart; Engelsen, Agnete S T; Enserink, Jorrit M; Escalante, Ricardo; Esclatine, Audrey; Escobar-Henriques, Mafalda; Eskelinen, Eeva-Liisa; Espert, Lucile; Eusebio, Makandjou-Ola; Fabrias, Gemma; Fabrizi, Cinzia; Facchiano, Antonio; Facchiano, Francesco; Fadeel, Bengt; Fader, Claudio; Faesen, Alex C; Fairlie, W Douglas; Falcó, Alberto; Falkenburger, Bjorn H; Fan, Daping; Fan, Jie; Fan, Yanbo; Fang, Evandro F; Fang, Yanshan; Fang, Yognqi; Fanto, Manolis; Farfel-Becker, Tamar; Faure, Mathias; Fazeli, Gholamreza; Fedele, Anthony O; Feldman, Arthur M; Feng, Du; Feng, Jiachun; Feng, Lifeng; Feng, Yibin; Feng, Yuchen; Feng, Wei; Fenz Araujo, Thais; Ferguson, Thomas A; Fernández, Álvaro F; Fernandez-Checa, Jose C; Fernández-Veledo, Sonia; Fernie, Alisdair R; Ferrante, Anthony W; Ferraresi, Alessandra; Ferrari, Merari F; Ferreira, Julio C B; Ferro-Novick, Susan; Figueras, Antonio; Filadi, Riccardo; Filigheddu, Nicoletta; Filippi-Chiela, Eduardo; Filomeni, Giuseppe; Fimia, Gian Maria; Fineschi, Vittorio; Finetti, Francesca; Finkbeiner, Steven; Fisher, Edward A; Fisher, Paul B; Flamigni, Flavio; Fliesler, Steven J; Flo, Trude H; Florance, Ida; Florey, Oliver; Florio, Tullio; Fodor, Erika; Follo, Carlo; Fon, Edward A; Forlino, Antonella; Fornai, Francesco; 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Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition)

In 2008 we published the first set of guidelines for standardizing research in autophagy. Since then, research on this topic has continued to accelerate, and many new scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Accordingly, it is important to update these guidelines for monitoring autophagy in different organisms. Various reviews have described the range of assays that have been used for this purpose. Nevertheless, there continues to be confusion regarding acceptable methods to measure autophagy, especially in multicellular eukaryotes. For example, a key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers or volume of autophagic elements (e.g., autophagosomes or autolysosomes) at any stage of the autophagic process versus those that measure flux through the autophagy pathway (i.e., the complete process including the amount and rate of cargo sequestered and degraded). In particular, a block in macroautophagy that results in autophagosome accumulation must be differentiated from stimuli that increase autophagic activity, defined as increased autophagy induction coupled with increased delivery to, and degradation within, lysosomes (inmost higher eukaryotes and some protists such as Dictyostelium) or the vacuole (in plants and fungi). In other words, it is especially important that investigators new to the field understand that the appearance of more autophagosomes does not necessarily equate with more autophagy. In fact, in many cases, autophagosomes accumulate because of a block in trafficking to lysosomes without a concomitant change in autophagosome biogenesis, whereas an increase in autolysosomes may reflect a reduction in degradative activity. It is worth emphasizing here that lysosomal digestion is a stage of autophagy and evaluating its competence is a crucial part of the evaluation of autophagic flux, or complete autophagy. Here, we present a set of guidelines for the selection and interpretation of methods for use by investigators who aim to examine macroautophagy and related processes, as well as for reviewers who need to provide realistic and reasonable critiques of papers that are focused on these processes. These guidelines are not meant to be a formulaic set of rules, because the appropriate assays depend in part on the question being asked and the system being used. In addition, we emphasize that no individual assay is guaranteed to be the most appropriate one in every situation, and we strongly recommend the use of multiple assays to monitor autophagy. Along these lines, because of the potential for pleiotropic effects due to blocking autophagy through genetic manipulation, it is imperative to target by gene knockout or RNA interference more than one autophagyrelated protein. In addition, some individual Atg proteins, or groups of proteins, are involved in other cellular pathways implying that not all Atg proteins can be used as a specific marker for an autophagic process. In these guidelines, we consider these various methods of assessing autophagy and what information can, or cannot, be obtained from them. Finally, by discussing the merits and limits of particular assays, we hope to encourage technical innovation in the field

Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition)

In 2008 we published the first set of guidelines for standardizing research in autophagy. Since then, research on this topic has continued to accelerate, and many new scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Accordingly, it is important to update these guidelines for monitoring autophagy in different organisms. Various reviews have described the range of assays that have been used for this purpose. Nevertheless, there continues to be confusion regarding acceptable methods to measure autophagy, especially in multicellular eukaryotes. For example, a key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers or volume of autophagic elements (e.g., autophagosomes or autolysosomes) at any stage of the autophagic process versus those that measure fl ux through the autophagy pathway (i.e., the complete process including the amount and rate of cargo sequestered and degraded). In particular, a block in macroautophagy that results in autophagosome accumulation must be differentiated from stimuli that increase autophagic activity, defi ned as increased autophagy induction coupled with increased delivery to, and degradation within, lysosomes (inmost higher eukaryotes and some protists such as Dictyostelium ) or the vacuole (in plants and fungi). In other words, it is especially important that investigators new to the fi eld understand that the appearance of more autophagosomes does not necessarily equate with more autophagy. In fact, in many cases, autophagosomes accumulate because of a block in trafficking to lysosomes without a concomitant change in autophagosome biogenesis, whereas an increase in autolysosomes may reflect a reduction in degradative activity. It is worth emphasizing here that lysosomal digestion is a stage of autophagy and evaluating its competence is a crucial part of the evaluation of autophagic flux, or complete autophagy. Here, we present a set of guidelines for the selection and interpretation of methods for use by investigators who aim to examine macroautophagy and related processes, as well as for reviewers who need to provide realistic and reasonable critiques of papers that are focused on these processes. These guidelines are not meant to be a formulaic set of rules, because the appropriate assays depend in part on the question being asked and the system being used. In addition, we emphasize that no individual assay is guaranteed to be the most appropriate one in every situation, and we strongly recommend the use of multiple assays to monitor autophagy. Along these lines, because of the potential for pleiotropic effects due to blocking autophagy through genetic manipulation it is imperative to delete or knock down more than one autophagy-related gene. In addition, some individual Atg proteins, or groups of proteins, are involved in other cellular pathways so not all Atg proteins can be used as a specific marker for an autophagic process. In these guidelines, we consider these various methods of assessing autophagy and what information can, or cannot, be obtained from them. Finally, by discussing the merits and limits of particular autophagy assays, we hope to encourage technical innovation in the field