Cell Biology

Spatial confinement induces reciprocating migration of epidermal keratinocytes and forms triphasic epithelia

1. Takuma Nohara
2. Junichi Kumamoto
3. Yosuke Mai
4. Mayuna Shimano
5. Sora Kato
6. Hiroyuki Kitahata
7. Hideki Nakamura
8. Shota Takashima
9. Mika Watanabe
10. Masaharu Nagayama
11. Tsukasa Oikawa
12. Hideyuki Ujiie
13. Ken Natsuga

• Curated by eLife

  eLife Assessment

  In this manuscript the authors established a novel three-dimensional culture system for stratified epithelia that allows epithelial cells to undergo epithelial-to-mesenchymal transition (EMT) and subsequent mesenchymal-to-epithelial transition (MET) while migrating through a membrane with 3.0-µm micropores, and, thus, provides a valuable tool to study EMT and possibly wound regeneration or metastasis. Furthermore, a set of experiments provides solid data suggesting that TGF beta signaling and actin polymerization promote movement of epithelial cells into the pores, while Piezo1 and Keratin 6 prevent keratinocyte migration and EMT.

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A delta-tubulin/epsilon-tubulin/Ted protein complex is required for centriole architecture

1. Rachel Pudlowski
2. Lingyi Xu
3. Ljiljana Milenkovic
4. Chandan Kumar
5. Katherine Hemsworth
6. Zayd Aqrabawi
7. Tim Stearns
8. Jennifer T Wang

• Curated by eLife

  eLife Assessment

  The study by Pudlowski et al. shows that a previously-identified protein complex, composed of delta- and epsilon-tubulin together with TEDC1 and TEDC2, functions in generating centriolar triplet microtubules, and that this is crucial for the proper formation of centriolar subdomains and the stability of centrioles throughout the cell cycle. This is an important study that advances our understanding of centriole biogenesis and structure and is supported by convincing evidence based on knockout cell lines, immunoprecipitation, and ultrastructure expansion microscopy. The work is of interest to cell biologists, in particular researchers with interest in centrosome biology.

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Srs2/PARI DNA helicase mediates abscission inhibition in response to chromatin bridges in yeast and human cells

1. Monica Dam
2. Nicola Brownlow
3. Audrey Furst
4. Coralie Spiegelhalter
5. Manuel Mendoza

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An unconventional interaction interface between the peroxisomal targeting factor Pex5 and Eci1 enables PTS1 independent import

1. Lior Peer
2. Nadav Elad
3. Orly Dym
4. Asa Tirosh
5. Jossef Jacobovitch
6. Shira Albeck
7. Maya Schuldiner
8. Yoav Peleg
9. Einat Zalckvar

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scRNA-seq and scATAC-seq reveal that Sertoli cell mediates spermatogenesis disorders through stage-specific communications in non-obstructive azoospermia

1. Shimin Wang
2. Hongxian Wang
3. Bicheng Jin
4. Hongli Yan
5. Qingliang Zheng
6. Dong Zhao

• Curated by eLife

  eLife Assessment

  This study provides valuable scRNA-seq and scATAC-seq data for testicular tissues from patients with spermatogenesis disorders. By examining the transcriptomic and epigenetic changes in Sertoli cells, the authors uncovered key regulatory mechanisms underlying male infertility and identified potential therapeutic targets. While some of the cellular profiling results are convincing, the analyses for differential profiling of NOA cases and epigenomics data remain incomplete.

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Novel mechanism for tubular injury in nephropathic cystinosis

1. Swastika Sur
2. Maggie Kerwin
3. Silvia Pineda
4. Poonam Sansanwal
5. Tara K Sigdel
6. Marina Sirota
7. Minnie M Sarwal

• Curated by eLife

  eLife Assessment

  This important study addresses the idea that defective lysosomal clearance might be causal to renal dysfunction in cystinosis. With mostly solid data, the authors observe that restoring expression of vATPase subunits and treatment with Astaxanthin ameliorate mitochondrial function in a model of renal epithelial cells, opening opportunities for translational application to humans.

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Maturation and detoxification of synphilin-1 inclusion bodies regulated by sphingolipids

1. Xiuling Cao
2. Xiang Wu
3. Lei Zhao
4. Ju Zheng
5. Xuejiao Jin
6. Xinxin Hao
7. Joris Winderickx
8. Shenkui Liu
9. Lihua Chen
10. Beidong Liu

• Curated by eLife

  eLife Assessment

  By combining Synthetic Genetic Array (SGA) analysis with state-of-the-art imaging techniques, this study provides strong evidence that sphingolipid metabolism controls the maturation of Parkinson's disease-associated Synphilin-1 inclusion bodies (SY1 IBs) on the mitochondrial surface in a yeast model. The authors present compelling proof that perturbing the sphingolipid metabolic pathway leads to delayed SY1 IB maturation and enhanced SY1-triggered toxicity. Altogether, the authors show the important role of sphingolipid metabolism in the detoxification process of misfolded proteins by facilitating large IB formation on the mitochondrial outer membrane.

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Ezrin defines TSC complex activation at endosomal compartments through EGFR–AKT signaling

1. Giuliana Giamundo
2. Daniela Intartaglia
3. Eugenio Del Prete
4. Elena Polishchuk
5. Fabrizio Andreone
6. Marzia Ognibene
7. Sara Buonocore
8. Bruno Hay Mele
9. Francesco Giuseppe Salierno
10. Jlenia Monfregola
11. Dario Antonini
12. Paolo Grumati
13. Alessandra Eva
14. Rossella De Cegli
15. Ivan Conte

• Curated by eLife

  eLife Assessment

  Giamundo et al. present fundamental data with new insights into the role of Ezrin, a major membrane-actin linker that assembles signaling complexes, in the spatial regulation of EGF signaling mediators. The use of multiple state-of-the-art microscopy techniques, multiple cell lines and inhibitors, together with in vivo models convincingly supports the majority of their conclusions. The findings are helpful for understanding EGF/mTOR signal transduction and support a critical role for the scaffolding protein Ezrin in the upstream regulation of EGFR/AKT activity, TSC subcellular localization and mTORC1 signaling. These findings contribute substantially to understanding how endo-lysosomal signaling are regulated, alterations which are implicated in many human diseases.

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Non-muscle myosin II regulates presynaptic actin assemblies and neuronal mechanobiology in Drosophila

1. Biljana Ermanoska
2. Jonathan Baets
3. Avital A. Rodal

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A ‘torn bag mechanism’ of small extracellular vesicle release via limiting membrane rupture of en bloc released amphisomes (amphiectosomes)

1. Tamás Visnovitz
2. Dorina Lenzinger
3. Anna Koncz
4. Péter M Vizi
5. Tünde Bárkai
6. Krisztina V Vukman
7. Alicia Galinsoga
8. Krisztina Németh
9. Kelsey Fletcher
10. Zsolt I Komlósi
11. Csaba Cserép
12. Ádám Dénes
13. Péter Lőrincz
14. Gábor Valcz
15. Edit I Buzas

• Curated by eLife

  eLife Assessment

  In this study, the authors present compelling data illustrating a potential mechanism for a hitherto not described form of extracellular vesicle biogenesis. Their model suggests that small extracellular vesicles are secreted from cells within larger vesicles, termed amphiectosomes, which subsequently rupture to release their smaller vesicle contents. This discovery represents an important advancement in the field.

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