Supporting Academic Writing and Publication Practice: PhD Students in Engineering and their Supervisors

Supporting Academic Writing and Publication Practice: PhD Students in Engineering and their Supervisors This poster documents the bottom-up efforts leading to the establishment of an academic writing support program for doctoral students at an engineering university in the Czech Republic (CR). To defend their dissertation, by law Czech doctoral students have to have published their research. Moreover, many faculties require their doctoral students to publish in prestigious English-medium journals, which is a challenge even for the students’ supervisors. Although publication requirements prior to dissertation defence are becoming common in many countries (Kamler and Thompson, 2014; Kelly, 2017), Czech students often face a challenge of writing in the absence of any prior writing support, where insufficient knowledge of English only adds an extra hurdle to the already difficult task of argumentation absent in Czech schooling. CR has a comparatively high number of doctoral students, but also alarmingly high drop-out rates with more than 50% students not finishing their studies (Beneš et al., 2017). In part, this is due to the students’ difficulties to publish (National Training Fund, 2019). This challenge could be addressed with systematic writing development, but Czech educators and dissertation supervisors are not commonly aware of composition being teachable as we learned from our preliminary study on writing support in doctoral programs in several Czech universities (Rosolová & Kasparkova, in press). While supervisors and university leaders tended to see writing development as a responsibility of the students, the doctoral students were calling for systematic support.  We strive to bring attention to the complexity of writing development and introduce a discourse on academic writing that conceives of academic writing as a bundle of analytical and critical thinking skills coupled with knowledge of rhetorical structures and different academic genres. We show how these skills can be taught through a course drawing on the results from a needs analysis survey among engineering doctoral students, the target population for this course (for more information on the survey, see Kasparkova & Rosolová, 2020). In the survey, students expressed a strong interest in a blended-learning format of the course, which we base on a model of a unique academic writing course developed for researchers at the Czech Academy of Sciences, but not common in Czech universities. Our course is work in progress and combines writing development with library modules that frame the whole writing process as a publication journey ranging from library searches, to a selection of a target journal and communication with reviewers. Because we are well aware that a course alone will not trigger a discourse on writing development in Czech higher education, we also plan on involving a broader academic community through workshops for supervisors and a handbook on teaching academic writing and publishing skills for future course instructors. Colleagues at EATAW 2019 conference commented on the poster sharing their difficulties from the engineering context and for instance suggested a computer game to engage engineers. This resonated with our plan to invite our engineers into the course through a geo-caching game – for more, see Kasparkova & Rosolová (2020). References Beneš, J., Kohoutek, J., & Šmídová, M. (2017). Doktorské studium v ČR [Doctoral studies in the CR].  Centre for Higher Education Studies. https://www.csvs.cz/wp-content/uploads/2018/10/Doktorandi_final_2018.pdf Rosolová, K. E., & Kasparkova, A. (in press). How do I cook an Impact Factor article if you do not show me what the ingredients are? Educare. https://ojs.mau.se/index.php/educare Kamler, B., & Thomson, P. (2014). Helping Doctoral Students Write (2nd edition). Routledge. Kasparkova, A., & Rosolová, K. (2020). A geo-caching game ‘Meet your Editor’ as a teaser for writing courses. 2020 IEEE International Professional Communication Conference (ProComm), Kennesaw, GA, USA, 2020, pp. 87-91. https://doi.org/10.1109/ProComm48883.2020.00019 Kelly, F. J. (2017). The idea of the PhD: The doctorate in the twenty-first-century imagination. Routledge. National Training Fund. (2019). Complex study of doctoral studies at Charles University and recommendations to improve the conditions and results. Report for the Charles University Management. Prague

EATAW2021: Selected papers from the 11th Conference of the European Association for the Teaching of Academic Writing, VSB-Technical University of Ostrava (online), Czech Republic, July, 2021

Letter from the Guest-editor

Epigenetic and antitumor effects of platinum(IV)-octanoato conjugates

We present the anticancer properties of cis, cis, trans-[Pt(IV)(NH3)2Cl2(OA)2] [Pt(IV)diOA] (OA = octanoato), Pt(IV) derivative of cisplatin containing two OA units appended to the axial positions of a six-coordinate Pt(IV) center. Our results demonstrate that Pt(IV)diOA is a potent cytotoxic agent against many cancer cell lines (the IC50 values are approximately two orders of magnitude lower than those of clinically used cisplatin or Pt(IV) derivatives with biologically inactive axial ligands). Importantly, Pt(IV)diOA overcomes resistance to cisplatin, is significantly more potent than its branched Pt(IV) valproato isomer and exhibits promising in vivo antitumor activity. The potency of Pt(IV)diOA is a consequence of several factors including enhanced cellular accumulation correlating with enhanced DNA platination and cytotoxicity. Pt(IV)diOA induces DNA hypermethylation and reduces mitochondrial membrane potential in cancer cells at levels markedly lower than the IC50 value of free OA suggesting the synergistic action of platinum and OA moieties. Collectively, the remarkable antitumor effects of Pt(IV)diOA are a consequence of the enhanced cellular uptake which makes it possible to simultaneously accumulate high levels of both cisplatin and OA in cells. The simultaneous dual action of cisplatin and OA by different mechanisms in tumor cells may result in a markedly enhanced and unique antitumor effects of Pt(IV) prodrugs

Walking of antitumor bifunctional trinuclear PtII complex on double-helical DNA

The trinuclear BBR3464 ([{trans-PtCl(NH3)2}2µ-(trans-Pt(NH3)2(H2N(CH2)6NH2)2)]4+) belongs to the polynuclear class of platinum-based anticancer agents. DNA adducts of this complex differ significantly in structure and type from those of clinically used mononuclear platinum complexes, especially, long-range (Pt, Pt) intrastrand and interstrand cross-links are formed in both 5′–5′ and 3′–3′ orientations. We show employing short oligonucleotide duplexes containing single, site-specific cross-links of BBR3464 and gel electrophoresis that in contrast to major DNA adducts of clinically used platinum complexes, under physiological conditions the coordination bonds between platinum and N7 of G residues involved in the cross-links of BBR3464 can be cleaved. This cleavage may lead to the linkage isomerization reactions between this metallodrug and double-helical DNA. Differential scanning calorimetry of duplexes containing single, site-specific cross-links of BBR3464 reveals that one of the driving forces that leads to the lability of DNA cross-links of this metallodrug is a difference between the thermodynamic destabilization induced by the cross-link and by the adduct into which it could isomerize. The rearrangements may proceed in the way that cross-links originally formed in one strand of DNA can spontaneously translocate from one DNA strand to its complementary counterpart, which may evoke walking of the platinum complex on DNA molecule

Chiral discrimination in platinum anticancer drugs.

In this article we review the biological activity of analogs of the antitumor drug cisplatin that contain chiral amine ligands. Interaction with DNA and formation of cross-links with adjacent purine bases are considered to be the crucial steps in the antitumor activity of this class of complexes. Because double-helical DNA has a chiral structure, interaction with enantiomeric complexes of platinum should lead to diastereomeric adducts. It has been demonstrated that DNA cross-links of platinum complexes with enantiomeric amine ligands not only can exhibit different conformational features but also can be processed differently by the cellular machinery as a consequence of these conformational differences. These results expand the general knowledge of how the stereochemistry of the platinum-DNA adduct can influence the cell response and contribute to understanding the processes that are crucial for antitumor activity. The steric requirements of the chiral ligands, in terms of configuration and flexibility, are also elucidated

Conformation, protein recognition and repair of DNA interstrand and intrastrand cross-links of Antitumor trans-[PtCl(2)(NH(3))(thiazole)]

Replacement of one ammine in clinically ineffective trans-[PtCl(2)(NH(3))(2)] (transplatin) by a planar N-heterocycle, thiazole, results in significantly enhanced cytotoxicity. Unlike ‘classical’ cisplatin {cis-[PtCl(2)(NH(3))(2)]} or transplatin, modification of DNA by this prototypical cytotoxic transplatinum complex trans-[PtCl(2)(NH(3))(thiazole)] (trans-PtTz) leads to monofunctional and bifunctional intra or interstrand adducts in roughly equal proportions. DNA fragments containing site-specific bifunctional DNA adducts of trans-PtTz were prepared. The structural distortions induced in DNA by these adducts and their consequences for high-mobility group protein recognition, DNA polymerization and nucleotide excision repair were assessed in cell-free media by biochemical methods. Whereas monofunctional adducts of trans-PtTz behave similar to the major intrastrand adduct of cisplatin [J. Kasparkova, O. Novakova, N. Farrell and V. Brabec (2003) Biochemistry, 42, 792–800], bifunctional cross-links behave distinctly differently. The results suggest that the multiple DNA lesions available to trans-planaramine complexes may all contribute substantially to their cytotoxicity so that the overall drug cytotoxicity could be the sum of the contributions of each of these adducts. However, acquisition of drug resistance could be a relatively rare event, since it would have to entail resistance to or tolerance of multiple, structurally dissimilar DNA lesions

Diazido mixed-amine platinum(IV) anticancer complexes activatable by visible-light form novel DNA adducts

Platinum diam(m)ine complexes, such as cisplatin, are successful anticancer drugs, but suffer from problems of resistance and side-effects. Photoactivatable PtIV prodrugs offer the potential of targeted drug release and new mechanisms of action. We report the synthesis, X-ray crystallographic and spectroscopic properties of photoactivatable diazido complexes trans,trans,trans-[Pt(N3)2(OH)2(MA)(Py)] (1; MA=methylamine, Py=pyridine) and trans,trans,trans-[Pt(N3)2(OH)2(MA)(Tz)] (2; Tz=thiazole), and interpret their photophysical properties by TD-DFT modelling. The orientation of the azido groups is highly dependent on H bonding and crystal packing, as shown by polymorphs 1 p and 1 q. Complexes 1 and 2 are stable in the dark towards hydrolysis and glutathione reduction, but undergo rapid photoreduction with UVA or blue light with minimal amine photodissociation. They are over an order of magnitude more potent towards HaCaT keratinocytes, A2780 ovarian, and OE19 oesophageal carcinoma cells than cisplatin and show particular potency towards cisplatin-resistant human ovarian cancer cells (A2780cis). Analysis of binding to calf-thymus (CT), plasmids, oligonucleotide DNA and individual nucleotides reveals that photoactivated 1 and 2 form both mono- and bifunctional DNA lesions, with preference for G and C, similar to transplatin, but with significantly larger unwinding angles and a higher percentage of interstrand cross-links, with evidence for DNA strand cross-linking further supported by a comet assay. DNA lesions of 1 and 2 on a 50 bp duplex were not recognised by HMGB1 protein, in contrast to cisplatin-type lesions. The photo-induced platination reactions of DNA by 1 and 2 show similarities with the products of the dark reactions of the PtII compounds trans-[PtCl2(MA)(Py)] (5) and trans-[PtCl2(MA)(Tz)] (6). Following photoactivation, complex 2 reacted most rapidly with CT DNA, followed by 1, whereas the dark reactions of 5 and 6 with DNA were comparatively slow. Complexes 1 and 2 can therefore give rapid potent photocytotoxicity and novel DNA lesions in cancer cells, with no activity in the absence of irradiation

A cyclometallated IrIII complex conjugated to a coumarin derivative is a potent photodynamic agent against prostate differentiated and tumorigenic cancer stem cells

A cyclometalated IrIII complex conjugated to a far-red-emitting coumarin, IrIII-COUPY (3), was recently shown as a very promising photosensitizer suitable for photodynamic therapy of cancer. Therefore, the primary goal of this work was to deepen knowledge on the mechanism of its photoactivated antitumor action so that this information could be used to propose a new class of compounds as drug candidates for curing very hardly treatable human tumors, such as androgen resistant prostatic tumors of metastatic origin. Conventional anticancer chemotherapies exhibit several disadvantages, such as limited efficiency to target cancer stem cells (CSCs), which are considered the main reason for chemotherapy resistance, relapse, and metastasis. Herein, we show, using DU145 tumor cells, taken as the model of hormone-refractory and aggressive prostate cancer cells resistant to conventional antineoplastic drugs, that the photoactivated conjugate 3 very efficiently eliminates both prostate bulk, differentiated and prostate, hardly treatable CSCs simultaneously and with a similar efficiency. Notably, the very low toxicity of IrIII-COUPY conjugate in the prostate DU145 cells in the dark and its pronounced selectivity for tumor cells compared with noncancerous cells could result in low side effects and reduced damage of healthy cells during the photoactivated therapy by this agent. Moreover, the experiments performed with the 3D spheroids formed from DU145 CSCs showed that conjugate 3 can penetrate the inner layers of tumorspheres, which might markedly increase its therapeutic effect. Also interestingly, this conjugate induces apoptotic cell death in prostate cancer DU145 cells associated with calcium signaling flux in these cells and autophagy. To the best of our knowledge, this is the first study demonstrating that a photoactivatable metal-based compound is an efficient agent capable of killing even hardly treatable CSC

[(?6 -p-cymene)Ru(H2O)3] 2+ Binding Capability of Aminohydroxamates - A Solution and Solid State Study

L