Lymphangioleiomyomatosis biomarkers linked to lung metastatic potential and cell stemness

Lymphangioleiomyomatosis (LAM) is a rare lung-metastasizing neoplasm caused by the proliferation of smooth muscle-like cells that commonly carry loss-of-function mutations in either the tuberous sclerosis complex 1 or 2 (TSC1 or TSC2) genes. While allosteric inhibition of the mechanistic target of rapamycin (mTOR) has shown substantial clinical benefit, complementary therapies are required to improve response and/or to treat specific patients. However, there is a lack of LAM biomarkers that could potentially be used to monitor the disease and to develop other targeted therapies. We hypothesized that the mediators of cancer metastasis to lung, particularly in breast cancer, also play a relevant role in LAM. Analyses across independent breast cancer datasets revealed associations between low TSC1/2 expression, altered mTOR complex 1 (mTORC1) pathway signaling, and metastasis to lung. Subsequently, immunohistochemical analyses of 23 LAM lesions revealed positivity in all cases for the lung metastasis mediators fascin 1 (FSCN1) and inhibitor of DNA binding 1 (ID1). Moreover, assessment of breast cancer stem or luminal progenitor cell biomarkers showed positivity in most LAM tissue for the aldehyde dehydrogenase 1 (ALDH1), integrin-ß3 (ITGB3/CD61), and/or the sex-determining region Y-box 9 (SOX9) proteins. The immunohistochemical analyses also provided evidence of heterogeneity between and within LAM cases. The analysis of Tsc2-deficient cells revealed relative over-expression of FSCN1 and ID1; however, Tsc2-deficient cells did not show higher sensitivity to ID1-based cancer inhibitors. Collectively, the results of this study reveal novel LAM biomarkers linked to breast cancer metastasis to lung and to cell stemness, which in turn might guide the assessment of additional or complementary therapeutic opportunities for LAM

Gestión y análisis de los fenómenos en las organizaciones

272 páginas.En el primer capítulo se presenta La función directiva y la gestión de la innovación basada en la recreación del ser social … en él se plantea que la función directiva en las organizaciones económicas contemporáneas exige un proceso continuo de análisis y reflexión ya que hay profundos cambios debidos a la globalización. El segundo capítulo trata sobre la administración y gestión, fenómenos organizacionales en el eje del discurso social, que tiene como objetivo distinguir la diferencia entre administración y gestión. Los autores sostienen que estos conceptos son diferentes ya que una y otra representan elaboraciones discursivas con diferentes propósitos. El capítulo tres, Reflexión del aspecto social en la formación de los estudiantes de administración a través de la revisión de los Planes y Programas impartidos en la UAM, UNAM, IPN y La Salle, … tiene por objetivo realizar un análisis comparativo a partir de la revisión de diferentes Planes de Estudio de Instituciones de Educación Superior, públicas y privadas. … El capítulo cuatro se titula Problemas y agenda de investigación organizacionales de la Agencia Mexicana de Cooperación Internacional para el Desarrollo. Los autores sostienen que la política pública, las organizaciones y las relaciones entre éstas pueden entenderse como fenómenos organizacionales y por tanto ser estudiadas desde la perspectiva organizacional. El capítulo cinco, que lleva por título Vicisitudes de la incorporación tecnológica en la organización a propósito de los sistemas de información. Los autores sostienen que cuando se incorpora tecnología en una organización se hace visible la resistencia al cambio de algunas generaciones, lo que permite visibilizar la brecha generacional y la necesidad de alfabetización digital. Podemos decir que este capítulo conceptualiza, revisa, estudia y advierte sobre las vicisitudes de la incorporación tecnológica en la organización a propósito de los sistemas de información. El sexto y último capítulo del libro se titula LIA: emprendimiento de mujeres en una startup. En este trabajo se presentan las interrogantes surgidas después de que una de las autoras ganara un premio internacional en una startup. Las consideraciones versan sobre el sistema capitalista y las startup como organizaciones que fomentan el emprendimiento; lo que obliga a las autoras a explicar qué significa emprendimiento y específicamente emprendimiento femenino, para poder exponer el caso LIA, que es el emprendimiento femenino ganador del premio internacional

Después del 68

Los movimientos estudiantiles de 1968 han sido a lo largo del tiempo un referente socorrido al hablar de las luchas sociales en el mundo. Las movilizaciones en Francia y otros países europeos, las marchas y piquetes de huelga en varios países latinoamericanos y hasta las expresiones de descontento juvenil en Berkeley y algunas otras universidades en Estados Unidos, resultaron entonces en llamados a la emancipación, gritos libertarios frecuentemente recordados en distintos momentos y para variados propósitos.

Social In

Seminario: El quehacer del empresario mexicano, sus retos y perspectivas en el ámbito lega

Potential Distribution and Medicinal Uses of the Mexican Plant Cuphea aequipetala Cav. (Lythraceae)

Carrying out studies that lead us to obtain information on both the cultural and biological heritage of a locality, region, or country allows us to create appropriate strategies for the conservation of biocultural diversity. In this context, the objective of this study was to model the potential distribution of Cuphea aequipetala Cav. within the Mexican territory, to identify the main environmental variables that delimit its habitat, and to obtain information from traditional knowledge through the medicinal uses that the inhabitants of nearby communities give to the plant. Potential distribution modeling was performed with MaxEnt together with 19 bioclimatic variables of Worldclim plus three variables closely related to the habitat of the species. Data on its presence were obtained in situ within the Lagunas de Zempoala National Park and from iNaturalist. Information on the medicinal uses of the plant was obtained through semi-structured surveys with people who were in continuous contact with it. The potential range of C. equipetala Cav. was 3205.63 km2, which represents 0.16% of the Mexican territory. The altitude, precipitation in the driest period, average temperature of the warmest quarter, and average temperature of the driest quarter were the variables that had the greatest effects on the potential distribution (49%), and these factors mainly delimited the suitability of the habitat. C. aequipetala Cav. is still used in traditional medicine, mainly for conditions related to cancer, shocks, and inflammation. Finally, it was found that the potential distribution coincided with the states of the country where its medicinal use was reported. This information is important, since it constitutes the basis for performing actions targeting the conservation of this species of medicinal relevance. For example, potential distribution areas can be integrated into habitat restoration and conservation plans to prevent anthropogenic activities, such as felling, that directly affect the habitat. This information can also be used as a reference to promote the preservation of medicinal uses among the young population of the distribution areas

Potential Distribution and Medicinal Uses of the Mexican Plant <i>Cuphea aequipetala</i> Cav. (Lythraceae)

Carrying out studies that lead us to obtain information on both the cultural and biological heritage of a locality, region, or country allows us to create appropriate strategies for the conservation of biocultural diversity. In this context, the objective of this study was to model the potential distribution of Cuphea aequipetala Cav. within the Mexican territory, to identify the main environmental variables that delimit its habitat, and to obtain information from traditional knowledge through the medicinal uses that the inhabitants of nearby communities give to the plant. Potential distribution modeling was performed with MaxEnt together with 19 bioclimatic variables of Worldclim plus three variables closely related to the habitat of the species. Data on its presence were obtained in situ within the Lagunas de Zempoala National Park and from iNaturalist. Information on the medicinal uses of the plant was obtained through semi-structured surveys with people who were in continuous contact with it. The potential range of C. equipetala Cav. was 3205.63 km2, which represents 0.16% of the Mexican territory. The altitude, precipitation in the driest period, average temperature of the warmest quarter, and average temperature of the driest quarter were the variables that had the greatest effects on the potential distribution (49%), and these factors mainly delimited the suitability of the habitat. C. aequipetala Cav. is still used in traditional medicine, mainly for conditions related to cancer, shocks, and inflammation. Finally, it was found that the potential distribution coincided with the states of the country where its medicinal use was reported. This information is important, since it constitutes the basis for performing actions targeting the conservation of this species of medicinal relevance. For example, potential distribution areas can be integrated into habitat restoration and conservation plans to prevent anthropogenic activities, such as felling, that directly affect the habitat. This information can also be used as a reference to promote the preservation of medicinal uses among the young population of the distribution areas

Atomic-Scale Investigation on the Evolution of Tio2-Anatase Prepared by a Sonochemical Route and Treated with NaOH

To date, the formation mechanisms of TiO2, as well as its heterostructures, have not been clarified. Moreover, detailed research on the transition from a tetragonal anatase phase to the monoclinic phase of the TiO2(B) phase and their interface structure has been quite limited until now. In the present study, we report on the sonochemical synthesis of TiO2-anatase with a crystallite size of 5.2 &plusmn; 1.5 nm under different NaOH concentrations via the hydrothermal method. The use of alkaline solution and the effect of the temperature and reaction time on the formation and structural properties of TiO2-anatase nanopowders were studied. The effects of NaOH concentration on the formation and transformation of titanate structures are subject to thermal effects that stem from the redistribution of energy in the system. These mechanisms could be attributed to three phenomena: (1) the self-assembly of nanofibers and nanosheets, (2) the Ostwald ripening process, and (3) the self-development of hollow TiO2 mesostructures

An annotated checklist of the macrofungi (Ascomycota, Basidiomycota, and Glomeromycota) from Quintana Roo, Mexico

According to records available in the literature, 380 species of fungi and fungus-like organisms are known for the state of Quintana Roo on the Yucatán Peninsula of Mexico. We carried out mycological surveys in this state, following the classical methods for collecting, describing, and curating macrofungi. As a result of our research, 21 species are recorded for the first time for Quintana Roo, and Amanita arenicola O. K. Milller & Lodge, Inocybe xerophytica Pegler, and Russula cremeolilacina Pegler are recorded for the first time for Mexico. The distinctive characteristics and photographs are provided for the new records. As a result of this study, 401 species of macrofungi are known for Quintana Roo