Similarities in Blood Mononuclear Cell Membrane Phospholipid Profiles During Malignancy

Phospholipids (PLs), key elements of cellular membranes, are regulated reciprocally with membrane proteins and can act as sensors for alterations in physiological or pathological states of cells including initiation and development of cancer. On the other hand, peripheral blood mononuclear cells (MNCs) play an important role in antitumor immune response by reacting to cancerous modifications in distant organs. In the current study, we tested the hypothesis that tumor initiation and development are reflected in the alteration pattern of the MNC PL component. We analyzed MNC membrane PL fractions in samples from healthy individuals and from patients with diverse types of cancers to reveal possible alterations induced by malignancy. Compared to healthy controls, the cancer samples demonstrated shifts in several membrane PL profiles. In particular, when analyzing cancer data pooled together, there were significantly higher levels in lysophosphatidylcholine, phosphatidylcholine, and phosphatidylethanolamine fractions, and significantly lower quantities in phosphatidylinositol, phosphatidylserine, and phosphatidic acid fractions in cancer samples compared to controls. The levels of sphingomyelins and diphosphatidylglycerols were relatively unaffected. Most of the differences in PLs were sustained during the analysis of individual cancers such as breast cancer and chronic lymphocytic leukemia. Our findings suggest the presence of a common pattern of changes in MNC PLs during malignancy

Novel amphiphilic cationic porphyrin and its Ag(II) complex as potential anticancer agents

In the present study we have synthesized a novel amphiphilic porphyrin and its Ag(II) complex through modification of water-soluble porphyrinic structure in order to increase its lipophilicity and in turn pharmacological potency. New cationic non-symmetrical meso-substituted porphyrins were characterized by UV-visible, electrospray ionization mass spectrometry (ESI-MS), 1H NMR techniques, lipophilicity (thin-layer chromatographic retention factor, Rf), and elemental analysis. The key toxicological profile (i.e. cytotoxicity and cell line- (cancer type-) specificity; genotoxicity; cell cycle effects) of amphiphilic Ag porphyrin was studied in human normal and cancer cell lines of various tissue origins and compared with its water-soluble analog. Structural modification of the molecule from water-soluble to amphiphilic resulted in a certain increase in the cytotoxicity and a decrease in cell line-specificity. Importantly, Ag(II) porphyrin showed less toxicity to normal cells and greater toxicity to their cancerous counterparts as compared to cisplatin. The amphiphilic complex was also not genotoxic and demonstrated a slight cytostatic effect via the cell cycle delay due to the prolongation of S-phase. As expected, the performed structural modification affected also the photocytotoxic activity of metal-free amphiphilic porphyrin. The ligand tested on cancer cell line revealed a dramatic (more than 70-fold) amplification of its phototoxic activity as compared to its water-soluble tetracationic metal-free analog. The compound combines low dark cytotoxicity with 5 fold stronger phototoxicity relative to Chlorin e6 and could be considered as a potential photosensitizer for further development in photodynamic therapy. © 2014 Elsevier Inc

Young GI Societies in Europe: 2019 update

Abstract Background: One of the aims of the Young Talent Group (YTG) is to make United European Gastroenterology (UEG) more attractive to young fellows interested in gastroenterology (GI), and to actively involve them in UEG activities and the activities of their respective national societies. In 2017, we conducted a survey among the Friends of the UEG YTG with the aim of identifying the state of organization and needs of Young GI Sections (YGISs) throughout Europe, highlighting areas for further development and improvement. Aims: The aim of the current web-based survey was to assess the progress of YGISs over 1 year, and persisting hurdles in forming and running a YGIS. Results: Overall, 38 of 42 Friends answered the survey (91%). The number of YGISs has increased significantly from 12 in 2017 to 25 in 2019. Young gastroenterologists remained supported, but not influenced, by national societies. Results of the survey suggest that a lack of dedicated and motivated fellows has replaced a lack of funding as the most prevalent hurdle in forming these types of sections. Conclusion: Our survey shows that the development of YGISs has improved markedly within the last 2 years. However, several limitations, like underrepresentation in subcommittees of national societies, remain and need to be addressed in order to involve young gastroenterologists in their respective national societies and within UEG, to pave the way for future research, education and excellent quality of care, and reduce health inequalities across Europe