Katharina Kotschnew , Denise Winkler , Jonas Reckmann , Charlotte Mann , Alina Schweigert , Greta Tellkamp , Kristian M. Müller , Gabriele Fischer von Mollard
{"title":"The double deficiency of the SNARE proteins vti1a and vti1b affects neurite outgrowth and signaling in N1E-115 neuroblastoma cells.","authors":"Katharina Kotschnew , Denise Winkler , Jonas Reckmann , Charlotte Mann , Alina Schweigert , Greta Tellkamp , Kristian M. Müller , Gabriele Fischer von Mollard","doi":"10.1016/j.ejcb.2024.151461","DOIUrl":"10.1016/j.ejcb.2024.151461","url":null,"abstract":"<div><div>During intracellular trafficking N-ethylmaleimide-sensitive-factor attachment receptor (SNARE) proteins catalyze the membrane fusion by assembling into a four-helix complex. In the mouse model, loss of the endosomal SNAREs vti1a and vti1b results in a perinatal lethal phenotype and neuronal defects including decreased neurite outgrowth in cultured primary neurons.</div><div>We used a CRISPR/Cas9 system to generate a <em>Vti1a Vti1b</em> double knockout (DKO) in the neuroblastoma cell line N1E-115. Three different DKO cell lines were obtained and examined at genome and protein level. The double deficiency impaired proper differentiation based on lower levels of synaptic proteins as well as reduced neurite formation and elongation compared to wild type cells in differentiation medium. Neurite elongation can be induced by a variety of extracellular signals via different signaling cascades. Treatment with the Rho kinase inhibitor Y27632, which stimulates enlargeosome exocytosis, or with neurotrophic factors (BDNF, NGF and NT3) resulted in reduced stimulation of all DKO clones and in significantly shorter neurites compared to wild type cells. The loss of vti1a and vti1b disrupted Akt signaling during enlargeosome-mediated and Erk signaling during BDNF-induced neurite outgrowth.</div></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 4","pages":"Article 151461"},"PeriodicalIF":4.5,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Kinase activity of histone chaperone APLF maintains steady state of centrosomes in mouse embryonic stem cells","authors":"Sruthy Manuraj Rajam , Pallavi Chinnu Varghese , Mayur Balkrishna Shirude , Khaja Mohieddin Syed , Anjali Devarajan , Kathiresan Natarajan , Debasree Dutta","doi":"10.1016/j.ejcb.2024.151439","DOIUrl":"10.1016/j.ejcb.2024.151439","url":null,"abstract":"<div><p>Our recent studies revealed the role of mouse Aprataxin PNK-like Factor (APLF) in development. Nevertheless, the comprehensive characterization of mouse APLF remains entirely unexplored. Based on domain deletion studies, here we report that mouse APLF's Acidic Domain and Fork Head Associated (FHA) domain can chaperone histones and repair DNA like the respective human orthologs. Immunofluorescence studies in mouse embryonic stem cells showed APLF co-localized with γ-tubulin within and around the centrosomes and govern the number and integrity of centrosomes via PLK4 phosphorylation. Enzymatic analysis established mouse APLF as a kinase. Docking studies identified three putative ATP binding sites within the FHA domain. Site-directed mutagenesis showed that R37 residue within the FHA domain is indispensable for the kinase activity of APLF thereby regulating the centrosome number. These findings might assist us comprehend APLF in different pathological and developmental conditions and reveal non-canonical kinase activity of proteins harbouring FHA domains that might impact multiple cellular processes.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151439"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000566/pdfft?md5=f9b67a2e63edf7473ac1ba067f0da878&pid=1-s2.0-S0171933524000566-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141537789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valeria Pizzuti , Emma Balducelli , Miriam Di Nunzio , Diletta Conte , Elisa Gessaroli , Marcello Demetri , Pasquale Marrazzo , Francesco Alviano , Valeria Corradetti , Federica Maritati , Gaetano La Manna , Giorgia Comai
{"title":"Urine-derived renal epithelial cells isolated after kidney transplant are sensitive to neutrophil gelatinase-associated lipocalin exposure during in vitro culture","authors":"Valeria Pizzuti , Emma Balducelli , Miriam Di Nunzio , Diletta Conte , Elisa Gessaroli , Marcello Demetri , Pasquale Marrazzo , Francesco Alviano , Valeria Corradetti , Federica Maritati , Gaetano La Manna , Giorgia Comai","doi":"10.1016/j.ejcb.2024.151442","DOIUrl":"10.1016/j.ejcb.2024.151442","url":null,"abstract":"<div><p>Urine-derived renal epithelial cells (URECs) are highly voided after kidney transplant and express typical kidney markers, including markers of kidney epithelial progenitor cells. Recently URECs have shown promising immunomodulatory properties when cultured with Peripheral Blood Mononuclear Cells (PBMCs), promoting an increase in the T regulatory cells. In vivo, kidney cells are highly exposed to damage associated molecules during both acute and chronic kidney injury. Neutrophil gelatinase-associated lipocalin (NGAL) is one of the most -known early marker of acute and chronic kidney damage. However, its role on the evolution of renal damage has not yet been fully described, nor has its impact on the characteristics of renal-derived cells during in vitro culture. The aim of this study is to investigate the effect of NGAL on the characteristics of URECs isolated after kidney transplant, by exposing these cells to the treatment with NGAL during in vitro culture and evaluating its effect on UREC viability, proliferation, and immunomodulatory potential. The exposure of URECs to NGAL reduced their viability and proliferative capacity, promoting the onset of apoptosis. The immunomodulatory properties of URECs were partially inhibited by NGAL, without affecting the increase of Treg cells observed during UREC-PBMCs coculture. These results suggest that the exposure to NGAL may compromise some features of kidney stem and specialized cell types, reducing their viability, increasing apoptosis, and partially altering their immunomodulatory properties. Thus, NGAL could represent a target for approaches acting on its inhibition or reduction to improve functional recovery.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151442"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000591/pdfft?md5=3bf86adbdd800b05eb371569a08ce6ca&pid=1-s2.0-S0171933524000591-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141579348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Andrea Rampin , Andrea Rossoni , Lefki Chaniotaki , Ioannis S. Gkiatas , Athina Tzora , Ioannis Skoufos , Nikolaos Diakakis , Nikitas Prassinos , Dimitrios I. Zeugolis
{"title":"Xenogeneic versus allogeneic serum and macromolecular crowding in human tenocyte cultures","authors":"Andrea Rampin , Andrea Rossoni , Lefki Chaniotaki , Ioannis S. Gkiatas , Athina Tzora , Ioannis Skoufos , Nikolaos Diakakis , Nikitas Prassinos , Dimitrios I. Zeugolis","doi":"10.1016/j.ejcb.2024.151445","DOIUrl":"10.1016/j.ejcb.2024.151445","url":null,"abstract":"<div><p>Allogeneic serum and tissue-specific extracellular matrix have been shown to maintain permanently differentiated cell phenotype in culture. This is of particular importance for human tenocytes, a cell population that readily loses its function during ex vivo culture. With these in mind, herein we extracted human tenocytes using either foetal bovine serum or human serum, cultured them in the absence and presence of carrageenan and Ficoll®, the most widely used macromolecular crowding agents (to induce tissue-specific extracellular matrix deposition), and assessed cellular function, via metabolic activity, viability, proliferation and immunofluorescence for collagen related molecules, non-collagenous molecules and transmembrane molecules. At day 7, longest time point assessed, neither carrageenan nor Ficoll® significantly affected metabolic activity, viability and proliferation in either serum and human serum significantly increased metabolic activity and proliferation. At day 7, in the absence of macromolecular crowding, cells in human serum deposited significantly lower collagen type VI, biglycan, versican and tenomodulin than cells in foetal bovine serum. Interestingly, at day 7, in comparison to the no macromolecular crowding group, carrageenan in foetal bovine serum induced the highest effect, as judged by the highest number of significantly increased molecules (collagen type I, collagen type IV, collagen type V, collagen type VI, transforming growth factor β1, matrix metalloproteinase 14, lumican, versican, scleraxis and integrin α2β1). These data, although contradict previous observations where human serum outperformed foetal bovine serum, at the same time, support the use of foetal bovine serum in the development of cell-based medicines.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151445"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000621/pdfft?md5=a1fdf9af0e9457eb6c97bd2d3faff8f2&pid=1-s2.0-S0171933524000621-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Caya M. Prins , Merve Ceylan , Jolanda M.A. Hogervorst , Ineke D.C. Jansen , Irene M. Schimmel , Ton Schoenmaker , Teun J. de Vries
{"title":"Osteogenic differentiation of periodontal ligament fibroblasts inhibits osteoclast formation","authors":"Caya M. Prins , Merve Ceylan , Jolanda M.A. Hogervorst , Ineke D.C. Jansen , Irene M. Schimmel , Ton Schoenmaker , Teun J. de Vries","doi":"10.1016/j.ejcb.2024.151440","DOIUrl":"https://doi.org/10.1016/j.ejcb.2024.151440","url":null,"abstract":"<div><p>One of the deficits of knowledge on bone remodelling, is to what extent cells that are driven towards osteogenic differentiation can contribute to osteoclast formation. The periodontal ligament fibroblast (PdLFs) is an ideal model to study this, since they play a role in osteogenesis, and can also orchestrate osteoclastogenesis.when co-cultured with a source of osteoclast-precursor such as peripheral blood mononuclear cells (PBMCs). Here, the osteogenic differentiation of PdLFs and the effects of this process on the formation of osteoclasts were investigated. PdLFs were obtained from extracted teeth and exposed to osteogenic medium for 0, 7, 14, or 21 out of 21 days. After this 21-day culturing period, the cells were co-cultured with peripheral blood mononuclear cells (PBMCs) for an additional 21 days to study osteoclast formation. Alkaline phosphatase (ALP) activity, calcium concentration, and gene expression of osteogenic markers were assessed at day 21 to evaluate the different stages of osteogenic differentiation. Alizarin red staining and scanning electron microscopy were used to visualise mineralisation. Tartrate-resistant acid phosphatase (TRAcP) activity, TRAcP staining, multinuclearity, the expression of osteoclastogenesis-related genes, and TNF-α and IL-1β protein levels were assessed to evaluate osteoclastogenesis. The osteogenesis assays revealed that PdLFs became more differentiated as they were exposed to osteogenic medium for a longer period of time. Mineralisation by these osteogenic cells increased with the progression of differentiation. Culturing PdLFs in osteogenic medium before co-culturing them with PMBCs led to a significant decrease in osteoclast formation. qPCR revealed significantly lower <em>DCSTAMP</em> expression in cultures that had been supplemented with osteogenic medium. Protein levels of osteoclastogenesis stimulator TNF-α were also lower in these cultures. The present study shows that the osteogenic differentiation of PdLFs reduces the osteoclastogenic potential of these cells. Immature cells of the osteoblastic lineage may facilitate osteoclastogenesis, whereas mature mineralising cells may suppress the formation of osteoclasts. Therefore, mature and immature osteogenic cells may have different roles in maintaining bone homeostasis.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151440"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000578/pdfft?md5=1eb1d93c5abf808f2cc5b4e0e2a279c6&pid=1-s2.0-S0171933524000578-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141485430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julia Matuszewska , Adrianna Krawiec , Artur Radziemski , Paweł Uruski , Andrzej Tykarski , Justyna Mikuła-Pietrasik , Krzysztof Książek
{"title":"Alterations of receptors and insulin-like growth factor binding proteins in senescent cells","authors":"Julia Matuszewska , Adrianna Krawiec , Artur Radziemski , Paweł Uruski , Andrzej Tykarski , Justyna Mikuła-Pietrasik , Krzysztof Książek","doi":"10.1016/j.ejcb.2024.151438","DOIUrl":"10.1016/j.ejcb.2024.151438","url":null,"abstract":"<div><p>The knowledge about cellular senescence expands dynamically, providing more and more conclusive evidence of its triggers, mechanisms, and consequences. Senescence-associated secretory phenotype (SASP), one of the most important functional traits of senescent cells, is responsible for a large extent of their context-dependent activity. Both SASP’s components and signaling pathways are well-defined. A literature review shows, however, that a relatively underinvestigated aspect of senescent cell autocrine and paracrine activity is the change in the production of proteins responsible for the reception and transmission of SASP signals, i.e., receptors and binding proteins. For this reason, we present in this article the current state of knowledge regarding senescence-associated changes in cellular receptors and insulin-like growth factor binding proteins. We also discuss the role of these alterations in senescence induction and maintenance, pro-cancerogenic effects of senescent cells, and aging-related structural and functional malfunctions.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151438"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000554/pdfft?md5=686a49fea7150fa4545825733a880e8a&pid=1-s2.0-S0171933524000554-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141467025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The role of integrins in brain health and neurodegenerative diseases","authors":"Yunhao Cui , Taisia Rolova , Susanna C. Fagerholm","doi":"10.1016/j.ejcb.2024.151441","DOIUrl":"10.1016/j.ejcb.2024.151441","url":null,"abstract":"<div><p>Integrins are heterodimeric membrane proteins expressed on the surface of most cells. They mediate adhesion and signaling processes relevant for a wealth of physiological processes, including nervous system development and function. Interestingly, integrins are also recognized therapeutic targets for inflammatory diseases, such as multiple sclerosis. Here, we discuss the role of integrins in brain development and function, as well as in neurodegenerative diseases affecting the brain (Alzheimer’s disease, multiple sclerosis, stroke). Furthermore, we discuss therapeutic targeting of these adhesion receptors in inflammatory diseases of the brain.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151441"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S017193352400058X/pdfft?md5=f293ae17864918e41908a51a93cbe440&pid=1-s2.0-S017193352400058X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141603532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pauline Balder , Celine Jones , Kevin Coward , Marc Yeste
{"title":"Sperm chromatin: Evaluation, epigenetic signatures and relevance for embryo development and assisted reproductive technology outcomes","authors":"Pauline Balder , Celine Jones , Kevin Coward , Marc Yeste","doi":"10.1016/j.ejcb.2024.151429","DOIUrl":"10.1016/j.ejcb.2024.151429","url":null,"abstract":"<div><p>Sperm chromatin is distinct from somatic cell chromatin, as a result of extensive remodeling during the final stages of spermatogenesis. In this process, the majority of histones is replaced with protamines. The chromatin is consequently highly condensed and inert, which facilitates protection of the DNA. The sperm epigenomic landscape is shaped by histone retention, histone and protamine modification, DNA methylation, and RNAs. In recent years, sperm chromatin integrity and its epigenetic marks have been increasingly studied, and the constitution of sperm chromatin is steadily being uncovered. This growing body of research prompts assessment of the frequently overlooked involvement of sperm in fertility and embryonic development. Moreover, numerous endogenous and exogenous factors are known to affect sperm chromatin, which may in turn impact the reproductive success. Concerns have been raised about the effects of assisted reproductive technology (ART) on the sperm epigenome, embryonic development and offspring health. This review examines the structure and epigenetic signatures of sperm chromatin in the context of fertility and early embryonic development. Additionally, sperm chromatin evaluation and causes of aberrant integrity are outlined. Building on the knowledge discussed in the current review, future research should aim to elucidate the intricate relationship between all aspects of sperm chromatin and embryo development. This could lead to the uncovering of new targets for treating infertility, as well as the acquisition of much needed insights into the possible reciprocal association between ART and sperm chromatin integrity.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151429"},"PeriodicalIF":4.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000463/pdfft?md5=b59b83b2b7f9a4a42708cb232813d86c&pid=1-s2.0-S0171933524000463-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141400730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The CCTδ subunit of the molecular chaperone CCT is required for correct localisation of p150Glued to spindle poles during mitosis","authors":"Carmen M. Córdoba-Beldad, Julie Grantham","doi":"10.1016/j.ejcb.2024.151430","DOIUrl":"10.1016/j.ejcb.2024.151430","url":null,"abstract":"<div><p>Chaperonin Containing Tailless complex polypeptide 1 (CCT) is a molecular chaperone composed of eight distinct subunits that can exist as individual monomers or as components of a double oligomeric ring, which is essential for the folding of actin and tubulin and other substrates. Here we assess the role of CCT subunits in the context of cell cycle progression by individual subunit depletions upon siRNA treatment in mammalian cells. The depletion of individual CCT subunits leads to variation in the distribution of cell cycle phases and changes in mitotic index. Mitotic defects, such as unaligned chromosomes occur when CCTδ is depleted, concurrent with a reduction in spindle pole-localised p150<sup>Glued</sup>, a component of the dynactin complex and a binding partner of monomeric CCTδ. In CCTδ-depleted cells, changes in the elution profile of p150<sup>Glued</sup> are observed consistent with altered conformations and or assembly states with the dynactin complex. Addition of monomeric CCTδ, in the form of GFP-CCTδ, restores correct p150<sup>Glued</sup> localisation to the spindle poles and rescues the mitotic segregation defects that occur when CCTδ is depleted. This study demonstrates a requirement for CCTδ in its monomeric form for correct chromosome segregation via a mechanism that promotes the correct localisation of p150<sup>Glued</sup>, thus revealing further complexities to the interplay between CCT, tubulin folding and microtubule dynamics.</p></div>","PeriodicalId":12010,"journal":{"name":"European journal of cell biology","volume":"103 3","pages":"Article 151430"},"PeriodicalIF":6.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0171933524000475/pdfft?md5=b46adc17cb28a7c1e9e5f3c7d7ba6f8f&pid=1-s2.0-S0171933524000475-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141394691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}