Article
Multidisciplinary Sciences
Julea Vlassakis, Louise L. Hansen, Ryo Higuchi-Sanabria, Yun Zhou, C. Kimberly Tsui, Andrew Dillin, Haiyan Huang, Amy E. Herr
Summary: This research introduces a novel method to simultaneously detect protein complexes in stressed cell populations, revealing potential cellular responses to specific treatments. The study also highlights the impact of non-chemical stress on cellular heterogeneity of F-actin. The assay developed in this work overcomes selectivity limitations to biochemically quantify single-cell protein complexes perturbed with diverse stimuli.
NATURE COMMUNICATIONS
(2021)
Review
Cell Biology
Vincent Mirouse
Summary: The Dystrophin-Associated Protein Complex (DAPC) is a well-defined and evolutionarily conserved complex in animals, which interacts with the F-actin cytoskeleton and the extracellular matrix. Its function is not limited to muscle integrity maintenance, but also involves adhesive properties and mechanotransduction. The review also highlights its developmental roles in tissue morphogenesis and basement membrane assembly.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
Article
Cell Biology
Vanessa Dimchev, Ines Lahmann, Stefan A. Koestler, Frieda Kage, Georgi Dimchev, Anika Steffen, Theresia E. B. Stradal, Franz Vauti, Hans-Henning Arnold, Klemens Rottner
Summary: This study investigated the effects of acute Arp2/3 complex removal on the actin cytoskeleton regulation, showing both direct and indirect impacts on cell morphology, migration directionality, and chemotaxis. Depletion of Arp2/3 complex resulted in altered cell behavior and cytoskeletal dynamics, highlighting the complexities of actin network maintenance and cellular motility.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2021)
Article
Cell Biology
Verena Hurst, Kiran Challa, Kenji Shimada, Susan M. Gasser
Summary: DNA damage induced by 405-nm laser light recruits proteins involved in base excision repair (BER), but perturbing actin or tubulin polymerization in human cells alters the dynamics of BER factors. Depolymerization of cytoplasmic actin may compromise BER efficiency in mammals due to increased levels of nuclear actin and tubulin, linking cytoskeletal integrity to BER.
MOLECULAR BIOLOGY OF THE CELL
(2021)
Article
Cell Biology
Shashi Prakash Singh, Peter A. Thomason, Robert H. Insall
Summary: Abi is phosphorylated in response to extracellular signals in Dictyostelium cells, modulating pseudopodia formation. Abi phosphorylation is not required for activation or inactivation of the Scar/WAVE complex, but affects pseudopod dynamics and cell migration speed.
Article
Biochemistry & Molecular Biology
Liyuan Xu, Lingyan Cao, Jiejie Li, Christopher J. Staiger
Summary: By combining genetic and small molecule inhibitor approaches, this study reveals the roles of two classes of actin filament nucleator in maintaining the homeostatic cortical cytoskeleton array in Arabidopsis epidermal cells. The findings suggest that multiple actin nucleation mechanisms cooperate to generate and maintain the unique cytoskeletal arrays within a common cytoplasm.
Article
Biochemistry & Molecular Biology
Shir Itah, David Elad, Ariel J. Jaffa, Dan Grisaru, Mordechai Rosner
Summary: This study aimed to explore the mechanobiological characteristics of transmembrane mucin secretion and cellular alterations of primary HCEC exposed to airflow-induced wall shear stress perturbations. The results showed that exposure to wall shear stress increased the polymerization of F-actin, altered cytoskeletal shape, and reduced the secretion of membrane-tethered MUC1.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Multidisciplinary Sciences
Fred E. Fregoso, Malgorzata Boczkowska, Grzegorz Rebowski, Peter J. Carman, Trevor van Eeuwen, Roberto Dominguez
Summary: Cortactin coactivates with NPFs to stabilize branched networks by linking Arp2/3 complex to F-actin. Cortactin's Acidic domain binds Arp2/3 complex through a reversal binding site and its N- and C-terminal sequences contribute to coactivation with NPFs.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Lisa Marie Walter, Sebastian Rademacher, Andreas Pich, Peter Claus
Summary: Under stress conditions, nuclear and cytoplasmic actin-cofilin rods are transiently formed to reduce actin filament turnover and ATP hydrolysis. The presence of actin rods in Spinal Muscular Atrophy (SMA) highlights the importance of dysregulated actin dynamics in motoneuron loss. Analysis of the composition of actin rods in a SMA cell culture model revealed binding of proteins involved in ubiquitination, translation, and protein folding, suggesting sequestration of these proteins and impairment of essential cellular functions. Involvement of profilin2 and its upstream effectors RhoA/ROCK in actin rod assembly in SMA indicates detrimental effects on motoneuron homeostasis by affecting actin dynamics and disturbing essential cellular pathways.
SCIENTIFIC REPORTS
(2021)
Article
Physiology
Shuya Ishii, Kotaro Oyama, Fuyu Kobirumaki-Shimozawa, Tomohiro Nakanishi, Naoya Nakahara, Madoka Suzuki, Shin'ichi Ishiwata, Norio Fukuda
Summary: Ishii et al. study the microheating-induced sliding movements of reconstituted thin filaments and find that the temperature dependence of thin filament sliding is regulated by myosin and tropomyosin-troponin. They also discover that mammalian striated muscle can contract efficiently through complementary regulation of myosin and tropomyosin-troponin within the body temperature range.
JOURNAL OF GENERAL PHYSIOLOGY
(2023)
Article
Multidisciplinary Sciences
Yunxian Huang, Jinghua Gui, Satu-Marja Myllymaki, Marja L. Mikkola, Osamu Shimmi
Summary: This study investigates the molecular mechanisms underlying apicobasal polarity-mediated growth control in the Drosophila wing imaginal disc. The findings reveal the key role of Scribble, Septate junction complex, and alpha-Catenin in maintaining apicobasal polarity and regulating tissue growth.
Article
Biochemistry & Molecular Biology
Cristina Risi, Luisa U. Schaefer, Betty Belknap, Ian Pepper, Howard D. White, Gunnar F. Schroeder, Vitold E. Galkin
Summary: Heart contraction relies on complex interactions between sarcomeric proteins, and missense mutations can lead to cardiovascular diseases. Structural studies have revealed the molecular basis of cardiac diseases caused by missense mutations in myosin and actin proteins, providing insights into the detailed structural description of the cardiac actomyosin interface.
Article
Neurosciences
Ken D. O'Halloran, Michael N. Maxwell, Anthony L. Marullo, Chantelle P. Hamilton, Sean C. Murchu, David P. Burns, Conor M. Mahony, Aoife D. Slyne, Sarah E. Drummond
Summary: Despite diaphragm weakness, peak inspiratory performance is preserved in young dystrophin-deficient mdx mice due to compensation by extra-diaphragmatic muscles. However, loss of compensation in advanced dystrophic disease leads to compromised respiratory system function.
JOURNAL OF PHYSIOLOGY-LONDON
(2023)
Article
Biophysics
Sara Ben-Saadon, Mark Gavriel, Uri Zaretsky, Ariel J. Jaffa, Dan Grisaru, David Elad
Summary: This study investigated the response of endothelial cells in the arterial intima to wall shear stresses using a co-culture model and a monolayer model. The results demonstrate the active role of smooth muscle cells in resisting flow-induced WSS in the intima.
JOURNAL OF BIOMECHANICS
(2021)
Article
Biochemistry & Molecular Biology
Jina Park, Kyoungho Jun, Yujin Choi, Eunju Yoon, Wonho Kim, Yoon-Gu Jang, Jongkyeong Chung
Summary: CORO7 is a key scaffold for controlling the Hippo pathway by modulating protein-protein interactions.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2021)
Review
Biodiversity Conservation
Miguel A. Meca, Anna Zhadan, Torsten H. Struck
Summary: This review discusses the systematics and recent advancements in the biology, ecology, and species diversity of the annelid taxa Parergodrilidae and Orbiniidae, emphasizing the importance of understanding their distribution, diversity, and evolution for studying progenesis in Annelida.
Article
Marine & Freshwater Biology
Elena Vortsepneva, Andrey Lavrov
Summary: The shedding of cuticle is observed in leech species such as Hirudo sp. and Haemopis cf. sanguisuga, while Erpobdella cf. octoculata did not shed their cuticle during the observation period. This difference may be related to their lifestyle and feeding habits.
INVERTEBRATE BIOLOGY
(2021)
Article
Zoology
Laetitia M. Gunton, Elena K. Kupriyanova, Tom Alvestad, Lynda Avery, James A. Blake, Olga Biriukova, Markus Boeggemann, Polina Borisova, Nataliya Budaeva, Ingo Burghardt, Maria Capa, Magdalena N. Georgieva, Christopher J. Glasby, Pan-Wen Hsueh, Pat Hutchings, Naoto Jimi, Jon A. Kongsrud, Joachim Langeneck, Karin Meissner, Anna Murray, Mark Nikolic, Hannelore Paxton, Dino Ramos, Anja Schulze, Robert Sobczyk, Charlotte Watson, Helena Wiklund, Robin S. Wilson, Anna Zhadan, Jinghuai Zhang
Summary: The study systematically sampled the benthic fauna from the deep eastern Australian margin, identifying over 6000 annelid specimens with 55 new species discovered. The geographical ranges of some species extended from the eastern Australian margin to the Great Australian Bight in South Australia.
Article
Zoology
Ekaterina Nikitenko, Alexander Ereskovsky, Elena Vortsepneva
Summary: This study investigated the formation of spicules in different stages of postlarval development of the nudibranch Onchidoris muricata, revealing that spicules form in the subepidermal space in early developmental stages immediately after larval settlement and only increase in size as development progresses. Mineralization zones were detected at the tips of the spicules, with the presence of collagen I in their overall composition. The findings suggest that spicules form from ectodermal cells under the ectodermal epithelium during the earliest stages of postlarval development.
Review
Biodiversity Conservation
Mael Grosse, Anna Zhadan, Joachim Langeneck, Dieter Fiege, Alejandro Martinez
Summary: Sedentarian annelids, a diverse group of marine worms with over 8600 species in approximately 43 families, have varying levels of attention and knowledge distribution among families. This review focuses on biodiversity, taxonomy, and systematics of six families, discussing challenges in studying these organisms and comparing methodologies for future research.
Article
Anatomy & Morphology
Elena Vortsepneva, David G. Herbert, Yuri Kantor
Summary: The gastropod radula, exhibiting exceptional variability in morphology, shares common patterns of teeth and radula formation among different groups. The formation of the radula in vetigastropods appears to follow a common pattern, with teeth synthesized in specific regions of the radular sac. Juvenile radula formation in M. helicinus differs significantly from the adult, suggesting a potentially widely occurring larval pattern in gastropods.
JOURNAL OF MORPHOLOGY
(2021)
Article
Anatomy & Morphology
Elena Vortsepneva, David G. Herbert, Yuri Kantor
Summary: This study provides the first examination of the rhipidoglossan radula in the Vetigastropoda species Puncturella noachina, identifying key features such as the posterior bifurcation of the radula formation zone and the multi-layered epithelium of the odontoblasts. Light and electron microscopy techniques were used to study the radula and its formation zone, revealing new insights into the ultrastructure of this specialized feeding structure.
JOURNAL OF MORPHOLOGY
(2021)
Article
Marine & Freshwater Biology
Elizaveta Naduvaeva, Alexander Tzetlin, Christiane Todt, Elena Vortsepneva
Summary: Caudofoveata is a clade of worm-like mollusks that burrow in soft marine sediments. Research has found that the peristaltic movement of these animals is similar to that of Annelida and coincides with the classical description of peristalsis.
INVERTEBRATE BIOLOGY
(2021)
Article
Anatomy & Morphology
Elena Vortsepneva, David G. Herbert, Yuri Kantor
Summary: This study investigates the formation of the rhipidoglossan radula in Nerita litterata, finding that it shares similarities with vetigastropods in terms of formation patterns and the presence of additional supporting rods. This complex, three-dimensional structure of the formation zone may be characteristic of gastropods with similar radula types.
JOURNAL OF MORPHOLOGY
(2022)
Article
Multidisciplinary Sciences
Elena Vortsepneva, Pierre Chevaldonne, Alexandra Klyukina, Elizaveta Naduvaeva, Christiane Todt, Anna Zhadan, Alexander Tzetlin, Ilya Kublanov
Summary: The study presents a new species of Solenogastres, Tegulaherpia sp., discovered in Mediterranean marine caves. The transparent mollusks were found to harbor a variety of microbial cells on their surface, including bacteria and archaea. These microbes, similar to those associated with other marine animals, are believed to play a role in nitrogen metabolism and biopolymer decomposition.
Article
Anatomy & Morphology
A. Mikhlina, E. Lisova, E. Vortsepneva
Summary: The morphology and formation process of the buccal armature have phylogenetic significance and are adaptive to the feeding strategy. Through the study of Cadlina laevis, we described the fine morphology and formation mechanism of the buccal armature, including the characteristics of the labial cuticle, the synthesis mechanism, the folding of the broad radula, and the division of the radular tooth formation zone.
Article
Zoology
Irina A. Ekimova, Olga A. Vorobyeva, Anna L. Mikhlina, Dimitry M. Schepetov, Elena V. Vortsepneva, Tatiana Antokhina, Vladimir V. Malakhov
Summary: Aeolid nudibranchs can incorporate cnidarian nematocysts for defense, and their feeding preferences are closely linked to this ability. This study investigates the correlation between ecological traits, feeding mechanisms, prey preferences, and cnidosac fine morphology in thirteen species of Fionidae. The results show high variation in nematocysts types, arrangement, and cell types within cnidosacs among different species. The study also reports the presence of special cells and chitinous spindles in the haemocoel of these species.
FRONTIERS IN ZOOLOGY
(2022)
Review
Anatomy & Morphology
Elena Vortsepneva, Anna Mikhlina, Yuri Kantor
Summary: Gastropoda is a highly variable and widely distributed group of mollusks that exhibit a diverse range of feeding strategies due to the morphological and functional diversity of their feeding apparatus. This apparatus, including the jaws and radula, plays a crucial role in feeding. The radula, consisting of teeth arranged in rows, undergoes continuous renewal throughout a mollusk's life. Various phylogenetically determined features influence the morphology of the radula, such as the shape, size, and number of odontoblasts forming each tooth. The development of the radula begins in the larval stage and is characterized by specific types in different phylogenetic lineages, such as the dentition patterns of docoglossan, rhipidoglossan, and taenioglossan radulae.
JOURNAL OF MORPHOLOGY
(2023)
Article
Anatomy & Morphology
Alexander Tzetlin, Elena Vortsepneva, Anna Zhadan
Summary: Research has shown that representatives of the extant family Oenonidae have jaw structures similar to those of fossils from the Paleozoic era. The study examined the fine structure and functional morphology of the jaw apparatus and ventral pharyngeal organ in one species of Oenonidae. Three-dimensional reconstruction revealed that the jaw apparatus of this species is more similar to that of the Dorvilleidae family.
JOURNAL OF MORPHOLOGY
(2023)
Article
Anatomy & Morphology
Anna Mikhlina, Elena Vortsepneva
Summary: Nudibranchia is an order of Gastropoda with diverse dietary specializations and buccal armature morphologies. The morphology of the buccal complex in Dendronotus frondosus, a cladobranch species, was studied using various microscopy techniques. The presence of chitinous spindles in the oral tube and esophagus suggests the mollusc species consumes Cnidaria. The synthesis of the jaw plate in D. frondosus is similar to other cladobranchs, with gnathoblasts and granular endoplasmic reticulum structures. However, unlike other molluscs, D. frondosus does not have a split synthesis zone for its broad radula.
JOURNAL OF MORPHOLOGY
(2023)