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Ducza L, Gaál B. The Neglected Sibling: NLRP2 Inflammasome in the Nervous System. Aging Dis 2024; 15:1006-1028. [PMID: 38722788 PMCID: PMC11081174 DOI: 10.14336/ad.2023.0926-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 09/26/2023] [Indexed: 05/13/2024] Open
Abstract
While classical NOD-like receptor pyrin domain containing protein 1 (NLRP1) and NLRP3 inflammasomal proteins have been extensively investigated, the contribution of NLRP2 is still ill-defined in the nervous system. Given the putative significance of NLRP2 in orchestrating neuroinflammation, further inquiry is needed to gain a better understanding of its connectome, hence its specific targeting may hold a promising therapeutic implication. Therefore, bioinformatical approach for extracting information, specifically in the context of neuropathologies, is also undoubtedly preferred. To the best of our knowledge, there is no review study selectively targeting only NLRP2. Increasing, but still fragmentary evidence should encourage researchers to thoroughly investigate this inflammasome in various animal- and human models. Taken together, herein we aimed to review the current literature focusing on the role of NLRP2 inflammasome in the nervous system and more importantly, we provide an algorithm-based protein network of human NLRP2 for elucidating potentially valuable molecular partnerships that can be the beginning of a new discourse and future therapeutic considerations.
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Affiliation(s)
- László Ducza
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Hungary, Hungary
| | - Botond Gaál
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Hungary, Hungary
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2
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Higashi S, Makiyama T, Sakane H, Nogami S, Shirataki H. Regulation of Hook1-mediated endosomal sorting of clathrin-independent cargo by γ-taxilin. J Cell Sci 2021; 135:273710. [PMID: 34897470 DOI: 10.1242/jcs.258849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 11/30/2021] [Indexed: 11/20/2022] Open
Abstract
In clathrin-independent endocytosis, Hook1, a microtubule- and cargo-tethering protein, participates in sorting of cargo proteins such as CD98 and CD147 into recycling endosomes. However, the molecular mechanism that regulates Hook1-mediated endosomal sorting is not fully understood. Here, we found that γ-taxilin is a novel regulator of Hook1-mediated endosomal sorting. γ-Taxilin depletion promoted both CD98-positive tubular formation and CD98 recycling. Conversely, overexpression of γ-taxilin inhibited the CD98-positive tubular formation. Depletion of Hook1, or Rab10 or Rab22a (which are both involved in Hook1-mediated endosomal sorting), attenuated the effect of γ-taxilin depletion on the CD98-positive tubular formation. γ-Taxilin depletion promoted CD147-mediated spreading of HeLa cells, suggesting that γ-taxilin may be a pivotal player in various cellular functions in which Hook1-mediated cargo proteins are involved. γ-Taxilin bound to the C-terminal region of Hook1 and inhibited its interaction with CD98; the latter interaction is necessary for sorting CD98. We suggest that γ-taxilin negatively regulates the sorting of Hook1-mediated cargo proteins into recycling endosomes by interfering with the interactions between Hook1 and the cargo proteins.
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Affiliation(s)
- Satoru Higashi
- Department of Molecular and Cell Biology, Graduate School of Medicine, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan
| | - Tomohiko Makiyama
- Department of Molecular and Cell Biology, Graduate School of Medicine, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan
| | - Hiroshi Sakane
- Department of Molecular and Cell Biology, Graduate School of Medicine, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan
| | - Satoru Nogami
- Department of Molecular and Cell Biology, Graduate School of Medicine, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan
| | - Hiromichi Shirataki
- Department of Molecular and Cell Biology, Graduate School of Medicine, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Tochigi 321-0293, Japan
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Zhao J, He Z, Chen X, Huang Y, Xie J, Qin X, Ni Z, Sun C. Growth trait gene analysis of kuruma shrimp (Marsupenaeus japonicus) by transcriptome study. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2021; 40:100874. [PMID: 34243027 DOI: 10.1016/j.cbd.2021.100874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/16/2021] [Accepted: 06/28/2021] [Indexed: 10/21/2022]
Abstract
Growth traits are a vital standard for the animal culture industry. The molecular mechanism of growth traits remains poorly understood, especially in aquaculture, which hinders the development of the selective breeding industry. Genomic resources discovered by next-generation sequencing (NGS) have been widely applied in certain species. However, accurate assembly and downstream analysis by NGS are still major challenges for species without reference genomes. In this study, a comparative transcriptome analysis of an economic crustacean species (Marsupenaeus japonicus) between a fast growth group and slow growth group at different stages was performed by SMRT (single molecule real time) and NGS. A high-quality full-length transcriptome (e.g., mean length of unigenes was longer than those unigenes assembled by Illumina clean reads from previous reports, and annotation rate was higher than Illumina sequencing in the same studies) was generated and analyzed. Several differentially expressed genes (DEGs) related to growth were identified and validated by quantitative real-time PCR (qPCR). The results showed that compared with the late stage, more DEGs were identified at the early stage, indicating that the growth-related physiological activity differences between different individuals at the early stage were higher than at the late stage. Moreover, 215 DEGs were shared between the early stage and late stage, and 109 had divergent functions during development. These 109 genes may play an important role in regulating the specific growth rate (SGR) of kuruma shrimp. In addition, twelve growth-related pathways were shared between the two comparative groups. Among these pathways, the fly Hippo signaling pathway and its key gene Mj14-3-3-like were identified for the first time to be involved in growth traits in crustaceans. Further analysis showed that Mj14-3-3-like was significantly downregulated in the fast growth group at the early stage and late stage; its expression level was reduced to its lowest level at the intermolt stage (C), the most important growth stage in shrimp, suggesting that Mj14-3-3-like may inhibit the growth of kuruma shrimp. Our study helps to elucidate the genes involved in the molecular mechanisms governing growth traits in kuruma shrimp, which is valuable for future shrimp developmental research.
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Affiliation(s)
- Jichen Zhao
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China
| | - Zihao He
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China
| | - Xieyan Chen
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China
| | - Yiyi Huang
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China
| | - Jingjing Xie
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China
| | - Xuan Qin
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China
| | - Zuotao Ni
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao, PR China.
| | - Chengbo Sun
- College of Fisheries, Guangdong Ocean University, Zhanjiang, PR China; Guangdong Provincial Laboratory of Southern Marine Science and Engineering, Zhanjiang, PR China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, PR China.
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4
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Lv S, Zhang G, Xie L, Yan Z, Wang Q, Li Y, Zhang L, Han Y, Li H, Du Y, Yang Y, Guo X. High TXLNA Expression Predicts Favourable Outcome for Pancreatic Adenocarcinoma Patients. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2585862. [PMID: 32185195 PMCID: PMC7060861 DOI: 10.1155/2020/2585862] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 01/30/2020] [Indexed: 02/06/2023]
Abstract
TXLNA (taxilin alpha), a binding partner of the syntaxin family, was identified as a key factor in the coordination of intracellular vesicle trafficking and highly expressed in various tumor cells. However, the accurate relation between TXLNA and tumorigenesis and progression of pancreatic adenocarcinoma (PAAD) is still unclear. The present study was designed to examine the expression profile of TXLNA and explore its prognostic significance in PAAD patients and the possible molecular regulatory mechanism by analyzing a series of data from databases, including GEPIA, LOGpc, STRING, and GeneMANIA. The results indicate that TXLNA mRNA and protein were remarkably increased in PAAD tissues compared with normal pancreatic tissues. The high TXLNA expression was significantly correlated with superior overall survival (OS), disease-free interval (DFI), disease specific survival (DSS), and progression-free interval (PFI) for PAAD patients. In summary, high TXLNA expression could predict favourable OS, DFI, DSS, and PFI for PAAD patients, and it might be as potential prognostic biomarkers and targets for PAAD.
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Affiliation(s)
- Shuangyu Lv
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Guosen Zhang
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Longxiang Xie
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Zhongyi Yan
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Qiang Wang
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Yongqiang Li
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Lu Zhang
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Yali Han
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Huimin Li
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Yaowu Du
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Yanjie Yang
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
| | - Xiangqian Guo
- Department of Preventive Medicine, Institute of Biomedical Informatics, Cell Signal Transduction Laboratory, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng 475004, China
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Makiyama T, Higashi S, Sakane H, Nogami S, Shirataki H. γ-Taxilin temporally regulates centrosome disjunction in a Nek2A-dependent manner. Exp Cell Res 2018; 362:412-423. [DOI: 10.1016/j.yexcr.2017.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 12/02/2017] [Accepted: 12/06/2017] [Indexed: 12/23/2022]
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Kanamori A, Imai Y, Ihara K, Nagata H, Nakano M, Tominaga K, Shimizu H, Makiyama T, Kuroda H, Shirataki H, Hiraishi H. α-taxilin overexpression correlates with proliferation activity but not with prognosis of colorectal cancer. Oncol Lett 2017; 14:1471-1476. [PMID: 28789367 PMCID: PMC5529874 DOI: 10.3892/ol.2017.6309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 05/23/2017] [Indexed: 01/07/2023] Open
Abstract
α-taxilin is a binding partner of syntaxins, which are the central coordinators of membrane traffic. Expression of α-taxilin has been implicated in the development of human glioblastoma, hepatocellular carcinoma and renal cell carcinoma. In the present study, the clinical significance of α-taxilin expression in colorectal cancer (CRC) was investigated. A total of 20 cases of colorectal intramucosal adenocarcinoma (IMA) with adenoma were analyzed using immunohistochemical analysis. The results demonstrated that α-taxilin expression was significantly associated with Ki-67 indices in adenoma and IMA. The patients expressed equally high levels of α-taxilin in the upper third of the intramucosal glands. These results suggest that α-taxilin expression is significantly associated with the proliferative activity of CRC, but that its overexpression alone is not a biomarker of malignancy. Next, α-taxilin expression was investigated in 57 advanced CRCs and its association with prognosis was determined. Well-differentiated and/or moderately differentiated adenocarcinomas in the left-sided colon with anatomic stage II and/or III were analyzed. α-taxilin expression levels were high on the surface of nearly all tumors, but variable at the deep advancing edge. α-taxilin levels at the advancing edge were not significantly associated with local invasiveness or prognosis. In conclusion, α-taxilin is a cell proliferation marker in colorectal epithelial neoplasms but cannot be a marker of malignancy or prognosis of CRCs.
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Affiliation(s)
- Akira Kanamori
- Department of Gastroenterology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Yasuo Imai
- Department of Diagnostic Pathology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Keisuke Ihara
- Department of Surgical Oncology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Hitoshi Nagata
- Department of Gastroenterological Surgery, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Masakazu Nakano
- Department of Gastroenterology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Keiichi Tominaga
- Department of Gastroenterology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Hiroaki Shimizu
- Department of Molecular and Cell Biology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Tomihiko Makiyama
- Department of Molecular and Cell Biology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Hajime Kuroda
- Department of Diagnostic Pathology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Hiromichi Shirataki
- Department of Molecular and Cell Biology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
| | - Hideyuki Hiraishi
- Department of Gastroenterology, School of Medicine, Dokkyo Medical University, Mibu, Tochigi 321-0293, Japan
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7
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Sakane H, Makiyama T, Nogami S, Horii Y, Akasaki K, Shirataki H. β‐Taxilin participates in differentiation of C2C12 myoblasts into myotubes. Exp Cell Res 2016; 345:230-8. [DOI: 10.1016/j.yexcr.2016.05.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/19/2016] [Accepted: 05/22/2016] [Indexed: 10/21/2022]
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8
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mTOR inhibition activates overall protein degradation by the ubiquitin proteasome system as well as by autophagy. Proc Natl Acad Sci U S A 2015; 112:15790-7. [PMID: 26669439 DOI: 10.1073/pnas.1521919112] [Citation(s) in RCA: 313] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Growth factors and nutrients enhance protein synthesis and suppress overall protein degradation by activating the protein kinase mammalian target of rapamycin (mTOR). Conversely, nutrient or serum deprivation inhibits mTOR and stimulates protein breakdown by inducing autophagy, which provides the starved cells with amino acids for protein synthesis and energy production. However, it is unclear whether proteolysis by the ubiquitin proteasome system (UPS), which catalyzes most protein degradation in mammalian cells, also increases when mTOR activity decreases. Here we show that inhibiting mTOR with rapamycin or Torin1 rapidly increases the degradation of long-lived cell proteins, but not short-lived ones, by stimulating proteolysis by proteasomes, in addition to autophagy. This enhanced proteasomal degradation required protein ubiquitination, and within 30 min after mTOR inhibition, the cellular content of K48-linked ubiquitinated proteins increased without any change in proteasome content or activity. This rapid increase in UPS-mediated proteolysis continued for many hours and resulted primarily from inhibition of mTORC1 (not mTORC2), but did not require new protein synthesis or key mTOR targets: S6Ks, 4E-BPs, or Ulks. These findings do not support the recent report that mTORC1 inhibition reduces proteolysis by suppressing proteasome expression [Zhang Y, et al. (2014) Nature 513(7518):440-443]. Several growth-related proteins were identified that were ubiquitinated and degraded more rapidly after mTOR inhibition, including HMG-CoA synthase, whose enhanced degradation probably limits cholesterol biosynthesis upon insulin deficiency. Thus, mTOR inhibition coordinately activates the UPS and autophagy, which provide essential amino acids and, together with the enhanced ubiquitination of anabolic proteins, help slow growth.
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Dong YS, Hou WG, Li Y, Liu DB, Hao GZ, Zhang HF, Li JC, Zhao J, Zhang S, Liang GB, Li W. Unexpected requirement for a binding partner of the syntaxin family in phagocytosis by murine testicular Sertoli cells. Cell Death Differ 2015; 23:787-800. [PMID: 26494466 DOI: 10.1038/cdd.2015.139] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 09/14/2015] [Accepted: 09/25/2015] [Indexed: 01/07/2023] Open
Abstract
Testicular phagocytosis by Sertoli cells (SCs) plays an essential role in the efficient clearance of apoptotic spermatogenic cells under both physiological and pathological conditions. However, the molecular mechanism underlying this unique process is poorly understood. Herein, we report for the first time that α-taxilin protein (TXLNA), a binding partner of the syntaxin family that functions as a central player in the intracellular vesicle traffic, was dominantly expressed in SCs. Induction of apoptosis in murine meiotic spermatocytes and haploid spermatids by busulfan treatment stimulated a significant increase of TXLNA in SCs at day (d) 14 and d 24 after busulfan treatment, respectively. Consistently, TXLNA expression was steadily upregulated when SCs were co-cultured with apoptotic germ cells (GCs). Moreover, using siRNA treatment, we found that ablation of endogenous TXLNA significantly impaired the phagocytotic capacity of SCs and thereby resulted in defective spermiogenesis and reduced fertility during the late recovery after testicular heat stress. Mechanistically, upregulation of TXLNA expression by apoptotic GCs was associated with the stabilization of ATP-binding cassette transporter 1 (ABCA1), a transporter-mediated lipid efflux from SCs and influencing male fertility. TXLNA acted as an upstream suppressor of ABCA1 ubiquitination and thus promoted ABCA1 stability and accumulation following GC apoptosis. We further provide in vitro evidence that epidermal growth factor receptor (EGFR)-mediated phosphorylation regulated ABCA1 ubiquitination and was enhanced by TXLNA deficiency during testicular phagocytosis. Taken together, the TXLNA/ABCA1 cascade may serve as an important feedback mechanism to modulate the magnitude of subsequent phagocytotic process of SCs in response to testicular injury.
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Affiliation(s)
- Y-s Dong
- Department of Neurosurgery, General Hospital of Shenyang Military Area Command, Shenyang 110016, China.,Department of Histology and Embryology, Fourth Military Medical University, Xi'an 710032, China
| | - W-g Hou
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Y Li
- Department of Air Logistics, 463rd Hospital of PLA, Shenyang 110042, China
| | - D-b Liu
- Department of Air Logistics, 463rd Hospital of PLA, Shenyang 110042, China
| | - G-z Hao
- Department of Neurosurgery, General Hospital of Shenyang Military Area Command, Shenyang 110016, China
| | - H-f Zhang
- Department of Neurosurgery, General Hospital of Shenyang Military Area Command, Shenyang 110016, China
| | - J-c Li
- Department of Neurosurgery, General Hospital of Shenyang Military Area Command, Shenyang 110016, China
| | - J Zhao
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an 710032, China
| | - S Zhang
- Department of Gynecology and Obstetrics, Reproductive Medicine Center, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - G-b Liang
- Department of Neurosurgery, General Hospital of Shenyang Military Area Command, Shenyang 110016, China
| | - W Li
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an 710032, China
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The Histochemistry and Cell Biology pandect: the year 2014 in review. Histochem Cell Biol 2015; 143:339-68. [PMID: 25744491 DOI: 10.1007/s00418-015-1313-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2015] [Indexed: 02/07/2023]
Abstract
This review encompasses a brief synopsis of the articles published in 2014 in Histochemistry and Cell Biology. Out of the total of 12 issues published in 2014, two special issues were devoted to "Single-Molecule Super-Resolution Microscopy." The present review is divided into 11 categories, providing an easy format for readers to quickly peruse topics of particular interest to them.
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11
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Sakane H, Horii Y, Nogami S, Kawano Y, Kaneko-Kawano T, Shirataki H. α-Taxilin interacts with sorting nexin 4 and participates in the recycling pathway of transferrin receptor. PLoS One 2014; 9:e93509. [PMID: 24690921 PMCID: PMC3972091 DOI: 10.1371/journal.pone.0093509] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 03/06/2014] [Indexed: 01/09/2023] Open
Abstract
Membrane traffic plays a crucial role in delivering proteins and lipids to their intracellular destinations. We previously identified α-taxilin as a binding partner of the syntaxin family, which is involved in intracellular vesicle traffic. α-Taxilin is overexpressed in tumor tissues and interacts with polymerized tubulin, but the precise function of α-taxilin remains unclear. Receptor proteins on the plasma membrane are internalized, delivered to early endosomes and then either sorted to the lysosome for degradation or recycled back to the plasma membrane. In this study, we found that knockdown of α-taxilin induced the lysosomal degradation of transferrin receptor (TfnR), a well-known receptor which is generally recycled back to the plasma membrane after internalization, and impeded the recycling of transferrin. α-Taxilin was immunoprecipitated with sorting nexin 4 (SNX4), which is involved in the recycling of TfnR. Furthermore, knockdown of α-taxilin decreased the number and length of SNX4-positive tubular structures. We report for the first time that α-taxilin interacts with SNX4 and plays a role in the recycling pathway of TfnR.
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Affiliation(s)
- Hiroshi Sakane
- Department of Molecular and Cell Biology, Graduate school of Medicine, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Yukimi Horii
- Department of Molecular and Cell Biology, Graduate school of Medicine, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Satoru Nogami
- Department of Molecular and Cell Biology, Graduate school of Medicine, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Yoji Kawano
- Department of Molecular and Cell Biology, Graduate school of Medicine, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Takako Kaneko-Kawano
- Department of Molecular and Cell Biology, Graduate school of Medicine, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Hiromichi Shirataki
- Department of Molecular and Cell Biology, Graduate school of Medicine, Dokkyo Medical University, Mibu, Tochigi, Japan
- * E-mail:
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