1
|
Tseng YW, Yang TJ, Hsu YL, Liu JH, Tseng YC, Hsu TW, Lu Y, Pan SH, Cheng TJR, Fang JM. Dual-targeting compounds possessing enhanced anticancer activity via microtubule disruption and histone deacetylase inhibition. Eur J Med Chem 2024; 265:116042. [PMID: 38141287 DOI: 10.1016/j.ejmech.2023.116042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/29/2023] [Accepted: 12/09/2023] [Indexed: 12/25/2023]
Abstract
Dual-targeting anticancer agents 4-29 are designed by combining the structural features of purine-type microtubule-disrupting compounds and HDAC inhibitors. A library of the conjugate compounds connected by appropriate linkers was synthesized and found to possess HDACs inhibitory activity and render microtubule fragmentation by activating katanin, a microtubule-severing protein. Among various zinc-binding groups, hydroxamic acid shows the highest inhibitory activity of Class I HDACs, which was also reconfirmed by three-dimensional quantitative structure-activity relationship (3D-QSAR) pharmacophore prediction. The purine-hydroxamate conjugates exhibit enhanced cytotoxicity against MDA-MB231 breast cancer cells, H1975 lung cancer cells, and various clinical isolated non-small-cell lung cancer cells with different epidermal growth factor receptor (EGFR) status. Pyridyl substituents could be used to replace the C2 and N9 phenyl moieties in the purine-type scaffold, which can help to improve the solubility under physiological conditions, thus increasing cytotoxicity. In mice treated with the purine-hydroxamate conjugates, the tumor growth rate was significantly reduced without causing toxic effects. Our study demonstrates the potential of the dual-targeting purine-hydroxamate compounds for cancer monotherapy.
Collapse
Affiliation(s)
- Yu-Wei Tseng
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Tsung-Jung Yang
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Yuan-Ling Hsu
- Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, 100, Taiwan
| | - Jyung-Hurng Liu
- Graduate Institute of Genomics and Bioinformatics, College of Life Sciences, National Chung Hsing University, Taichung, 40227, Taiwan
| | - Yin-Chen Tseng
- The Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Tse-Wei Hsu
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Yueh Lu
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Szu-Hua Pan
- Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, 100, Taiwan; Doctoral Degree Program of Translational Medicine, National Taiwan University, Taipei, 100, Taiwan; Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, 100, Taiwan.
| | | | - Jim-Min Fang
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan; The Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.
| |
Collapse
|
2
|
Wang Y, Yemelyanov A, Go CD, Kim S, Quinn JM, Flozak AS, Le PM, Liang S, Claude-Gingras A, Ikura M, Ishiyama N, Gottardi CJ. α-catenin mechanosensitivity as a route to cytokinesis failure through sequestration of LZTS2. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.25.554884. [PMID: 37662204 PMCID: PMC10473746 DOI: 10.1101/2023.08.25.554884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Epithelial cells can become polyploid upon tissue injury, but mechanosensitive cues that trigger this state are poorly understood. Using α-catenin (α-cat) knock-out Madin Darby Canine Kidney (MDCK) cells reconstituted with wild-type and mutant forms of α-cat as a model system, we find that an established α-cat actin-binding domain unfolding mutant designed to reduce force-sensitive binding to F-actin (α-cat-H0-FABD+) can promote cytokinesis failure, particularly along epithelial wound-fronts. Enhanced α-cat coupling to cortical actin is neither sufficient nor mitotic cell-autonomous for cytokinesis failure, but critically requires the mechanosensitive Middle-domain (M1-M2-M3) and neighboring cells. Disease relevant α-cat M-domain missense mutations known to cause a form of retinal pattern dystrophy (α-cat E307K or L436P) are associated with elevated binucleation rates via cytokinesis failure. Similar binucleation rates are seen in cells expressing an α-cat salt-bridge destabilizing mutant (R551A) designed to promote M2-M3 domain unfurling at lower force thresholds. Since binucleation is strongly enhanced by removal of the M1 as opposed to M2-M3 domains, cytokinetic fidelity is most sensitive to α-cat M2-M3 domain opening. To identify α-cat conformation-dependent proximity partners that contribute to cytokinesis, we used a biotin-ligase approach to distinguished proximity partners that show enhanced recruitment upon α-cat M-domain unfurling (R551A). We identified Leucine Zipper Tumor Suppressor 2 (LZTS2), an abscission factor previously implicated in cytokinesis. We confirm that LZTS2 enriches at the midbody, but discover it also localizes to tight and tricellular junctions. LZTS2 knock-down promotes binucleation in both MDCK and Retinal Pigmented Epithelial (RPE) cells. α-cat mutants with persistent M2-M3 domain opening showed elevated junctional enrichment of LZTS2 from the cytosol compared α-cat wild-type cells. These data implicate LZTS2 as a mechanosensitive effector of α-cat that is critical for cytokinetic fidelity. This model rationalizes how persistent mechano-activation of α-cat may drive tension-induced polyploidization of epithelia post-injury and suggests an underlying mechanism for how pathogenic α-cat mutations drive macular dystrophy.
Collapse
Affiliation(s)
- Yuou Wang
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Alex Yemelyanov
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Christopher D. Go
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, M5G 1X5, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5S 1A8, Canada
| | - Sun Kim
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, M5G 1X5, Canada
| | - Jeanne M. Quinn
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Annette S. Flozak
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Phuong M. Le
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Shannon Liang
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Anne Claude-Gingras
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, M5G 1X5, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5S 1A8, Canada
| | - Mitsu Ikura
- Department of Medical Biophysics, University Health Network, Princess Margaret Cancer Center, University of Toronto, Toronto, Ontario, Canada
| | - Noboru Ishiyama
- Department of Medical Biophysics, University Health Network, Princess Margaret Cancer Center, University of Toronto, Toronto, Ontario, Canada
| | - Cara J. Gottardi
- Department of Pulmonary Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
- Cell & Developmental Biology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| |
Collapse
|
3
|
Liu T, Ma J, Hou D, Wang W, Cao H. Haplotype-GGGT in long non-coding RNA MALAT1 inhibits brain metastatic lung cancer and lymph nodes of lung cancer via the MALAT1/miR-328/KATNB1. Aging (Albany NY) 2023; 15:1918-1930. [PMID: 36934373 PMCID: PMC10085600 DOI: 10.18632/aging.204563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 02/15/2023] [Indexed: 03/20/2023]
Abstract
The up-regulation of Katanin P8 has been reported to be correlated with a larger tumor size and lymph node metastasis in non-small-cell lung cancer (NSCLC) patients. And lncRNA MALAT1 was demonstrated to promote the proliferation of chronic myeloid leukemia cells via modulating miR-328. 135 lung cancer patients were divided into 6 groups according to their genotypes of MALAT1. The expression of KATNB1 was negatively correlated with the GGGT genotype of MALAT1. Decreased lymph node size and tumor size of brain metastatic lung were observed in patients with GGGT genotype of MALAT1. The luciferase activities of MALAT1 and KATNB1 were remarkably suppressed by miR-328 in A549 and H460. And the down-regulation of MALAT1 or up-regulation of miR-328 significantly repressed the KATNB1 expression in A549 and H460 cells. MALAT1 expression was reduced in patients carrying haplotype GGGT. A signaling pathway of MALAT1/miR-328/KATNB1 was established to explain the down-regulation of KATNB1 mRNA in patients carrying haplotype GGGT and reduced lymph node size in lung cancer and tumor size in brain metastatic lung cancer.
Collapse
Affiliation(s)
- Tingting Liu
- Department of Medical Imaging, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, China
| | - Jianpeng Ma
- Department of Magnetic Resonance Imaging, Dingbian County People’s Hospital, Dingbian, Yulin, Shaanxi 718600, China
| | - Dongmei Hou
- Department of Medical Imaging, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, China
| | - Weiqi Wang
- School of Pharmacy, Nantong University, Nantong, Jiangsu 226001, China
| | - Hetao Cao
- Department of Medical Imaging, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, China
| |
Collapse
|
4
|
Wu Z, Guo M, Yang J, Xiao Y, Liu W. Katanin subunits p60 and p80, potential biomarkers for papillary thyroid carcinoma to distinguish nodular goiter: STROBE. Medicine (Baltimore) 2022; 101:e29402. [PMID: 35713446 PMCID: PMC9276123 DOI: 10.1097/md.0000000000029402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 04/18/2022] [Indexed: 12/24/2022] Open
Abstract
Katanin subunits p60 and p80 are involved in microtubule-mediated cytoskeletal organization during cell division. Their aberrant expression has been found in prostate, breast, and non-small cell lung (NSCLC) cancers. It has recently been reported that compared with adjacent papillary thyroid carcinoma (PTC) tissues, both are highly expressed in tumor tissues. Here, we investigated whether katanin subunits p60 and p80 can be used as potential biomarkers for PTC to distinguish nodular goiter (NG).Immunohistochemistry was performed to investigate the expression of katanin subunits p60 and p80 in the tissues of 97 cases of PTC and NG. This cohort included 87 cases with PTC (74 classical or conventional (CPTC) and 13 follicular (FVPTC) variants) and 10 cases with NG.We found that katanin subunits p60 and p80 were expressed in PTC, but not in NG. The cutoff values of katanin p60 and p80 for PTC were 22.43% and 0.83%, respectively. The katanin subunit p60 was significantly associated with lymph node metastasis. Katanin subunit p80 was more highly expressed in CPTC than in FVPTC. The expression of the katanin subunit p60 was positively correlated with the expression of katanin p80 in PTC. Importantly, we found that overexpression of katanin p60 increased the expression of katanin p80 in a human papillary thyroid carcinoma KTC-1 cell line, which further supports the existence of katanin p60 and p80 feedback loops.Our results indicate that katanin subunits p60 and p80 may be used as potential PTC biomarkers to distinguish NG and may be novel therapeutic targets for PTC.
Collapse
Affiliation(s)
- Zhangming Wu
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Miao Guo
- Department of Clinical Laboratory, the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Jing Yang
- Department of Pathology, College of Basic Medical Sciences of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Yanjie Xiao
- Department of Epidemiology, Public Health College of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Wei Liu
- Institute of Biological Anthropology, Jinzhou Medical University, Jinzhou, Liaoning, China
| |
Collapse
|
5
|
LZTS2, a Novel and Independent Prognostic Biomarker for Clear Cell Renal Cell Carcinoma. Pathol Res Pract 2022; 232:153831. [DOI: 10.1016/j.prp.2022.153831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 02/20/2022] [Accepted: 02/24/2022] [Indexed: 11/18/2022]
|
6
|
Lynn NA, Martinez E, Nguyen H, Torres JZ. The Mammalian Family of Katanin Microtubule-Severing Enzymes. Front Cell Dev Biol 2021; 9:692040. [PMID: 34414183 PMCID: PMC8369831 DOI: 10.3389/fcell.2021.692040] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/04/2021] [Indexed: 12/12/2022] Open
Abstract
The katanin family of microtubule-severing enzymes is critical for cytoskeletal rearrangements that affect key cellular processes like division, migration, signaling, and homeostasis. In humans, aberrant expression, or dysfunction of the katanins, is linked to developmental, proliferative, and neurodegenerative disorders. Here, we review current knowledge on the mammalian family of katanins, including an overview of evolutionary conservation, functional domain organization, and the mechanisms that regulate katanin activity. We assess the function of katanins in dividing and non-dividing cells and how their dysregulation promotes impaired ciliary signaling and defects in developmental programs (corticogenesis, gametogenesis, and neurodevelopment) and contributes to neurodegeneration and cancer. We conclude with perspectives on future katanin research that will advance our understanding of this exciting and dynamic class of disease-associated enzymes.
Collapse
Affiliation(s)
- Nicole A. Lynn
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Emily Martinez
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Hieu Nguyen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jorge Z. Torres
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, United States
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA, United States
| |
Collapse
|
7
|
Shuai W, Wang G, Zhang Y, Bu F, Zhang S, Miller DD, Li W, Ouyang L, Wang Y. Recent Progress on Tubulin Inhibitors with Dual Targeting Capabilities for Cancer Therapy. J Med Chem 2021; 64:7963-7990. [PMID: 34101463 DOI: 10.1021/acs.jmedchem.1c00100] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Microtubules play a crucial role in multiple cellular functions including mitosis, cell signaling, and organelle trafficking, which makes the microtubule an important target for cancer therapy. Despite the great successes of microtubule-targeting agents in the clinic, the development of drug resistance and dose-limiting toxicity restrict their clinical efficacy. In recent years, multitarget therapy has been considered an effective strategy to achieve higher therapeutic efficacy, in particular dual-target drugs. In terms of the synergetic effect of tubulin and other antitumor agents such as receptor tyrosine kinases inhibitors, histone deacetylases inhibitors, DNA-damaging agents, and topoisomerase inhibitors in combination therapy, designing dual-target tubulin inhibitors is regarded as a promising approach to overcome these limitations and improve therapeutic efficacy. In this Perspective, we discussed rational target combinations, design strategies, structure-activity relationships, and future directions of dual-target tubulin inhibitors.
Collapse
Affiliation(s)
- Wen Shuai
- State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, Innovation Center of Nursing Research, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, Sichuan, China
| | - Guan Wang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, Innovation Center of Nursing Research, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, Sichuan, China
| | - Yiwen Zhang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, Innovation Center of Nursing Research, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, Sichuan, China
| | - Faqian Bu
- State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, Innovation Center of Nursing Research, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, Sichuan, China
| | - Sicheng Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Duane D Miller
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Wei Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Liang Ouyang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, Innovation Center of Nursing Research, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, Sichuan, China
| | - Yuxi Wang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, Innovation Center of Nursing Research, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, Sichuan, China.,Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China.,Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| |
Collapse
|
8
|
Chen Q, Lin F, Lin E, Huang Q, Wu G. Katanin P60 and P80 in papillary thyroid carcinoma patients: Indicators for exacerbated tumor features and worse disease-free survival. J Clin Lab Anal 2020; 34:e23502. [PMID: 33274499 PMCID: PMC7755818 DOI: 10.1002/jcla.23502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/15/2020] [Accepted: 05/22/2020] [Indexed: 12/13/2022] Open
Abstract
Background This study aimed to explore the clinical implications of katanin P60 and P80 (katanin P60/P80) regarding their correlations with clinicopathological features and survival profiles in papillary thyroid carcinoma (PTC) patients. Methods Tumor tissue and paired adjacent tissue specimens were obtained from 172 PTC patients who underwent lobectomy or thyroidectomy. Besides, immunohistochemistry assay and immunoreactive (IR) score (multiplying staining intensity score by density score) were used to determine katanin P60/P80 expressions. According to IR score (from 0 ~ 12), katanin P60/P80 expressions were classified as low (IR score 0 ~ 3) and high (IR score 4 ~ 12) expressions. Results Both katanin P60/P80 expressions were highly expressed in tumor tissue compared with adjacent tissue. Besides, tumor katanin P60 expression positively correlated with tumor katanin P80 expression. Tumor katanin P60 high expression correlated with larger tumor size, extrathyroidal invasion, advanced pT stage, pN stage, and pTNM stage, while no correlation of tumor katanin P60 expression with age or gender was observed; tumor katanin P80 high expression correlated with advanced pN stage and pTNM stage, whereas there was no correlation of tumor katanin P80 expression with age, gender, tumor size, extrathyroidal invasion, or pT stage. Furthermore, both tumor katanin P60/P80 high expressions correlated with shorter accumulating disease‐free survival. As for overall survival (OS), neither tumor katanin P60 nor P80 expression correlated with OS. Conclusion Katanin P60/P80 measurement might assist with tumor management and prognosis surveillance in PTC patients.
Collapse
Affiliation(s)
- Qinggui Chen
- Department of General Surgery, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, China
| | - Fusheng Lin
- Department of General Surgery, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, China
| | - Ende Lin
- Department of General Surgery, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, China
| | - Qinghe Huang
- Department of Intensive Care Unit, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, China
| | - Guoyang Wu
- Department of General Surgery, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, China
| |
Collapse
|
9
|
Ye Q, Zhang M, Yin Y. Katanin P80 correlates with larger tumor size, lymph node metastasis, and advanced TNM stage and predicts poor prognosis in non-small-cell lung cancer patients. J Clin Lab Anal 2020; 34:e23141. [PMID: 31944409 PMCID: PMC7171325 DOI: 10.1002/jcla.23141] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/22/2019] [Accepted: 11/15/2019] [Indexed: 12/21/2022] Open
Abstract
Objective The present study aimed to investigate the correlation of katanin P80 expression with clinicopathological features and survival profile in non–small‐cell lung cancer (NSCLC) patients. Methods Totally, 398 NSCLC patients treated by pulmonary resection were enrolled and their tumor specimens were collected to determine katanin P80 expression by immunohistochemistry (IHC) assay. Clinical data were collected at diagnosis, and survival data including disease‐free survival (DFS) and overall survival (OS) were assessed after treatment. Results There were 195 (49.0%) patients with katanin P80 high expression and 203 (51.0%) patients with katanin P80 low expression, respectively. Meanwhile, katanin P80 high expression was associated with larger tumor size (P = .001), lymph node (LYN) metastasis (P = .005), and advanced TNM stage (P = .001). As for survival data, katanin P80 high expression was correlated with reduced DFS (P < .001) and OS (P < .001). And forward stepwise multivariate Cox's regression revealed that katanin P80 high expression was an independent predictor for decreased DFS (P < .001) and OS (P < .001). Besides, further analysis indicated that DFS (P < .001) and OS (P < .001) were the shortest in patients with katanin P80 high+++ expression, followed by patients with katanin P80 high++ expression and then those with katanin P80 high + expression and katanin P80 low expression. Conclusion Katanin P80 correlates with larger tumor size, LYN metastasis, and advanced TNM stage, and serves as a potential biomarker for predicting poor survival in NSCLC patients.
Collapse
Affiliation(s)
- Qing Ye
- Department of Respiratory, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Min Zhang
- Teaching and Research Division of Internal Medicine, Hubei College of Chinese Medicine, Jingzhou, China
| | - Yiping Yin
- Department of Respiratory, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| |
Collapse
|
10
|
Design, synthesis, antitumor activities and biological studies of novel diaryl substituted fused heterocycles as dual ligands targeting tubulin and katanin. Eur J Med Chem 2019; 178:177-194. [DOI: 10.1016/j.ejmech.2019.05.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/26/2019] [Accepted: 05/27/2019] [Indexed: 12/22/2022]
|
11
|
Li X, Liu J, Shi PF, Fu P. Katanin P80 expression correlates with lymph node metastasis and worse overall survival in patients with breast cancer. Cancer Biomark 2019; 23:363-371. [PMID: 30223388 DOI: 10.3233/cbm-181369] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the correlation of katanin P80 expression with clinicopathological features and overall survival (OS) in surgical breast cancer (BC) patients. METHODS Four hundred and fourteen BC patients underwent surgery were analyzed in this retrospective cohort study. Katanin P80 expression was examined by immunofluorescence assay. The median follow-up duration was 118.0 months (quantiles: 99.0-140.5 months), the last follow-up date was Jul 1st 2017. RESULTS Eighty-five patients (20.5%) with katanin P80 positive expression and 329 patients (79.5%) with katanin P80 negative expression were observed in this research. Katanin P80 positive expression was correlated with higher N stage (p< 0.001) and TNM stage (p< 0.001). K-M curve and log-rank test revealed that katanin P80 positive patients presented with shorter OS compared with katanin P80 negative patients (p< 0.001). Multivariate Cox's regression analysis disclosed that katanin P80 positive expression (p< 0.001) and histologic grade (p< 0.001) could independently predict unfavorable OS. Furthermore, subgroups analysis was performed, which illuminated that katanin P80 positive expression was correlated with shorter OS in all subgroups divided by molecular subtyping and TNM stage (all p< 0.05) except in TNM stage I subgroup (p= 0.573). CONCLUSION Katanin P80 expression positively correlated with lymph node metastasis and could abe a novel biomarker for prognosis in BC patients.
Collapse
Affiliation(s)
- Xun Li
- Department of Thyroid and Breast Surgery, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of Thyroid and Breast Surgery, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jie Liu
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of Thyroid and Breast Surgery, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Peng-Fei Shi
- Department of Thyroid and Breast Surgery, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Peng Fu
- Department of Thyroid and Breast Surgery, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| |
Collapse
|
12
|
Fu W, Wu H, Cheng Z, Huang S, Rao H. The role of katanin p60 in breast cancer bone metastasis. Oncol Lett 2018; 15:4963-4969. [PMID: 29552132 PMCID: PMC5840750 DOI: 10.3892/ol.2018.7942] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 12/06/2017] [Indexed: 12/20/2022] Open
Abstract
p60 is a subunit of katanin involved in microtubule-severing. Previous studies of p60 were primarily focused on microtubule regulation and cell cycle regulation. More recent research has demonstrated that katanin p60 possesses a function in prostate cancer bone metastasis; however, its role in breast cancer bone metastasis remains unclear. In the present study, immunohistochemistry was used to analyze the expression of katanin p60 in primary and bone metastatic breast cancer. The role of up- and downregulated katanin p60 was investigated using cell proliferation, and migration experiments. Overall, katanin p60 was highly expressed in breast cancer bone metastatic tissue compared with primary tumor tissue. In breast cancer cells, overexpression of katanin p60 inhibited cell proliferation, but promoted cell migration, whereas silencing katanin p60 expression promoted cell proliferation but inhibited cell migration. Overall, the present study indicated that katanin p60 serves a role in cell proliferation and migration, and thus may be a novel therapeutic target for prevention of breast cancer metastasis.
Collapse
Affiliation(s)
- Wenrong Fu
- Department of Pathology, Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Hui Wu
- Department of Clinical Laboratory, Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Zhengjiang Cheng
- Department of Clinical Laboratory, Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Shaojun Huang
- Department of Clinical Laboratory, Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| | - Hui Rao
- Department of Clinical Laboratory, Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441021, P.R. China
| |
Collapse
|
13
|
Chai H, Zhang Q, Jiang Y, Wang G, Zhang S, Ahmed SE, Ma S. Identifying gene-environment interactions for prognosis using a robust approach. ECONOMETRICS AND STATISTICS 2017; 4:105-120. [PMID: 31157309 PMCID: PMC6541416 DOI: 10.1016/j.ecosta.2016.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
For many complex diseases, prognosis is of essential importance. It has been shown that, beyond the main effects of genetic (G) and environmental (E) risk factors, gene-environment (G × E) interactions also play a critical role. In practical data analysis, part of the prognosis outcome data can have a distribution different from that of the rest of the data because of contamination or a mixture of subtypes. Literature has shown that data contamination as well as a mixture of distributions, if not properly accounted for, can lead to severely biased model estimation. In this study, we describe prognosis using an accelerated failure time (AFT) model. An exponential squared loss is proposed to accommodate data contamination or a mixture of distributions. A penalization approach is adopted for regularized estimation and marker selection. The proposed method is realized using an effective coordinate descent (CD) and minorization maximization (MM) algorithm. The estimation and identification consistency properties are rigorously established. Simulation shows that without contamination or mixture, the proposed method has performance comparable to or better than the nonrobust alternative. However, with contamination or mixture, it outperforms the nonrobust alternative and, under certain scenarios, is superior to the robust method based on quantile regression. The proposed method is applied to the analysis of TCGA (The Cancer Genome Atlas) lung cancer data. It identifies interactions different from those using the alternatives. The identified markers have important implications and satisfactory stability.
Collapse
Affiliation(s)
- Hao Chai
- Department of Biostatistics, Yale University, United States
| | - Qingzhao Zhang
- School of Economics and Wang Yanan Institute for Studies in Economics, Xiamen University, China
| | - Yu Jiang
- School of Public Health, University of Memphis, United States
| | - Guohua Wang
- School of Mathematical Sciences, University of Chinese Academy of Sciences, China
| | - Sanguo Zhang
- School of Mathematical Sciences, University of Chinese Academy of Sciences, China
| | - Syed Ejaz Ahmed
- Department of Mathematics and Statistics, Brock University, Canada
| | - Shuangge Ma
- Department of Biostatistics, Yale University, United States
| |
Collapse
|
14
|
Johnson CA, Wright CE, Ghashghaei HT. Regulation of cytokinesis during corticogenesis: focus on the midbody. FEBS Lett 2017; 591:4009-4026. [PMID: 28493553 DOI: 10.1002/1873-3468.12676] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 04/23/2017] [Accepted: 05/07/2017] [Indexed: 12/21/2022]
Abstract
Development of the cerebral cortices depends on tight regulation of cell divisions. In this system, stem and progenitor cells undergo symmetric and asymmetric divisions to ultimately produce neurons that establish the layers of the cortex. Cell division culminates with the formation of the midbody, a transient organelle that establishes the site of abscission between nascent daughter cells. During cytokinetic abscission, the final stage of cell division, one daughter cell will inherit the midbody remnant, which can then maintain or expel the remnant, but mechanisms and circumstances influencing this decision are unclear. This review describes the midbody and its constituent proteins, as well as the known consequences of their manipulation during cortical development. The potential functional relevance of midbody mechanisms is discussed.
Collapse
Affiliation(s)
- Caroline A Johnson
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Comparative Biomedical Sciences Graduate Program, Neurosciences Concentration Area, North Carolina State University, Raleigh, NC, USA
| | - Catherine E Wright
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - H Troy Ghashghaei
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.,Comparative Biomedical Sciences Graduate Program, Neurosciences Concentration Area, North Carolina State University, Raleigh, NC, USA.,Program in Genetics, North Carolina State University, Raleigh, NC, USA.,Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA
| |
Collapse
|
15
|
Kuo TC, Li LW, Pan SH, Fang JM, Liu JH, Cheng TJ, Wang CJ, Hung PF, Chen HY, Hong TM, Hsu YL, Wong CH, Yang PC. Purine-Type Compounds Induce Microtubule Fragmentation and Lung Cancer Cell Death through Interaction with Katanin. J Med Chem 2016; 59:8521-34. [DOI: 10.1021/acs.jmedchem.6b00797] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ting-Chun Kuo
- Ph.D.
Program in Translational Medicine, National Taiwan University and Academia Sinica, Taipei, Taiwan
| | - Ling-Wei Li
- Department
of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Szu-Hua Pan
- Ph.D.
Program in Translational Medicine, National Taiwan University and Academia Sinica, Taipei, Taiwan
- Graduate
Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Genome
and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei 106, Taiwan
| | - Jim-Min Fang
- Department
of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Jyung-Hurng Liu
- Department
of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan
- Institute
of Genomics and Bioinformatics, National Chung Hsing University, Taichung 402, Taiwan
- Agricultural
Biotechnology Center, National Chung Hsing University, Taichung 402, Taiwan
- Rong
Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung 402, Taiwan
| | - Ting-Jen Cheng
- Genomics
Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Chia-Jen Wang
- Department
of Internal Medicine, National Taiwan University College of Medicine, Taipei 100, Taiwan
- Institute
of Stem Cell and Translational Cancer Research, Chang Gung Memorial HospitalTaipei 105, Taiwan
| | - Pei-Fang Hung
- Department
of Internal Medicine, National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Hsuan-Yu Chen
- Institute
of Statistical Science, Academia Sinica, Taipei 115, Taiwan
| | - Tse-Ming Hong
- Institute
of Clinical Medicine, National Cheng Kung University College of Medicine, Tainan 701, Taiwan
| | - Yuan-Ling Hsu
- Graduate
Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Chi-Huey Wong
- Genomics
Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Pan-Chyr Yang
- Institute
of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
- NTU
Center for Genomic Medicine, National Taiwan University, Taipei 100, Taiwan
| |
Collapse
|
16
|
Sudo H, Nakajima K. The mitotic tensegrity guardian tau protects mammary epithelia from katanin-like1-induced aneuploidy. Oncotarget 2016; 7:53712-53734. [PMID: 27447563 PMCID: PMC5288216 DOI: 10.18632/oncotarget.10728] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 06/16/2016] [Indexed: 11/25/2022] Open
Abstract
The microtubule associated-protein tau has been identified as an effective positive prognostic indicator in breast cancer. To explore the physiological function of tau in early carcinogenesis, endogenous tau was knocked down in primary cultured human mammary epithelial cells. This resulted in chromosome-bridging during anaphase followed by micronucleation, both of which were suppressed by a further katanin-like1 knockdown. We also detected that the exogenously expressed katanin-like1 induction of cellular transformation is prevented by exogenous tau in rat fibroblasts. The mutant katanin-like1 (L123V) identified in breast cancer showed an increase in this transformation capacity as well as microtubule severing activity resistant to tau. The tau knockdown resulted in a loss of the kinetochore fibers on which tau is normally localized. This physical fragility was also observed in isolated tau-knockdown mitotic spindles, supporting the relevance of microtubule damage to the onset of transformation. The karyotyping of tau-knockdown cells showed increased frequency of loss of one X chromosome, further suggesting the involvement of tau in breast tumorigenesis. We propose that tau may contribute to tumor progression by protecting spindle microtubules from excess severing by katanin-like1. We also present data indicating that the microtubule-binding octapeptide NAP is a candidate modifier against the tau deficiency in tumor cells.
Collapse
Affiliation(s)
- Haruka Sudo
- Department of Biochemistry, The Nippon Dental University School of Life Dentistry at Tokyo, Chiyoda-ku, Tokyo 102-8159, Japan.,Department of Anatomy, Keio University School of Medicine, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Kazunori Nakajima
- Department of Anatomy, Keio University School of Medicine, Shinjuku-ku, Tokyo 160-8582, Japan
| |
Collapse
|
17
|
O'Donnell L, O'Bryan MK. Microtubules and spermatogenesis. Semin Cell Dev Biol 2014; 30:45-54. [PMID: 24440897 DOI: 10.1016/j.semcdb.2014.01.003] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/04/2014] [Accepted: 01/08/2014] [Indexed: 12/28/2022]
Abstract
Microtubules are dynamic polymers of tubulin subunits that underpin many essential cellular processes, such as cell division and migration. Spermatogenesis is the process by which spermatogenic stem cells undergo mitotic and meiotic division and differentiation to produce streamlined spermatozoa capable of motility and fertilization. This review summarizes the current knowledge of microtubule-based processes in spermatogenesis. We describe the involvement of microtubule dynamics in Sertoli cell shape and function, as well as in the mitotic and meiotic division of germ cells. The roles of microtubules in sperm head shaping, via the development and function of the manchette, and in sperm flagella development are also discussed. The review brings together data from microscopy studies and genetically modified mouse models, and reveals that the regulation of microtubule dynamics is essential for male fertility.
Collapse
Affiliation(s)
- Liza O'Donnell
- MIMR-PHI Institute of Medical Research, Clayton, Victoria 3168, Australia; Department of Anatomy and Developmental Biology, Monash University, Victoria 3800, Australia.
| | - Moira K O'Bryan
- Department of Anatomy and Developmental Biology, Monash University, Victoria 3800, Australia
| |
Collapse
|
18
|
Matsuo M, Shimodaira T, Kasama T, Hata Y, Echigo A, Okabe M, Arai K, Makino Y, Niwa SI, Saya H, Kishimoto T. Katanin p60 contributes to microtubule instability around the midbody and facilitates cytokinesis in rat cells. PLoS One 2013; 8:e80392. [PMID: 24303010 PMCID: PMC3841192 DOI: 10.1371/journal.pone.0080392] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 10/02/2013] [Indexed: 12/20/2022] Open
Abstract
The completion of cytokinesis is crucial for mitotic cell division. Cleavage furrow ingression is followed by the breaking and resealing of the intercellular bridge, but the detailed mechanism underlying this phenomenon remains unknown. Katanin is a microtubule-severing protein comprised of an AAA ATPase subunit and an accessory subunit designated as p60 and p80, respectively. Localization of katanin p60 was observed at the midzone to midbody from anaphase to cytokinesis in rat cells, and showed a ring-shaped distribution in the gap between the inside of the contractile ring and the central spindle bundle in telophase. Katanin p60 did not bind with p80 at the midzone or midbody, and localization was shown to be dependent on microtubules. At the central spindle and the midbody, no microtubule growth plus termini were seen with katanin p60, and microtubule density was inversely correlated with katanin p60 density in the region of katanin p60 localization that seemed to lead to microtubule destabilization at the midbody. Inhibition of katanin p60 resulted in incomplete cytokinesis by regression and thus caused the appearance of binucleate cells. These results suggest that katanin p60 contributes to microtubule instability at the midzone and midbody and facilitates cytokinesis in rat cells.
Collapse
Affiliation(s)
- Moe Matsuo
- Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Tetsuhiro Shimodaira
- Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | | | - Yukie Hata
- Link Genomics Co., Ltd., Tokyo, Japan
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Ayumi Echigo
- Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Masaki Okabe
- Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | | | | | | | - Hideyuki Saya
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Toshihiko Kishimoto
- Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Chiba, Japan
- Proteome Analysis Center, Faculty of Science, Toho University, Funabashi, Chiba, Japan
- * E-mail:
| |
Collapse
|
19
|
Zempel H, Luedtke J, Kumar Y, Biernat J, Dawson H, Mandelkow E, Mandelkow EM. Amyloid-β oligomers induce synaptic damage via Tau-dependent microtubule severing by TTLL6 and spastin. EMBO J 2013; 32:2920-37. [PMID: 24065130 PMCID: PMC3831312 DOI: 10.1038/emboj.2013.207] [Citation(s) in RCA: 206] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 08/22/2013] [Indexed: 01/23/2023] Open
Abstract
Mislocalization and aggregation of Aβ and Tau combined with loss of synapses and microtubules (MTs) are hallmarks of Alzheimer disease. We exposed mature primary neurons to Aβ oligomers and analysed changes in the Tau/MT system. MT breakdown occurs in dendrites invaded by Tau (Tau missorting) and is mediated by spastin, an MT-severing enzyme. Spastin is recruited by MT polyglutamylation, induced by Tau missorting triggered translocalization of TTLL6 (Tubulin-Tyrosine-Ligase-Like-6) into dendrites. Consequences are spine loss and mitochondria and neurofilament mislocalization. Missorted Tau is not axonally derived, as shown by axonal retention of photoconvertible Dendra2-Tau, but newly synthesized. Recovery from Aβ insult occurs after Aβ oligomers lose their toxicity and requires the kinase MARK (Microtubule-Affinity-Regulating-Kinase). In neurons derived from Tau-knockout mice, MTs and synapses are resistant to Aβ toxicity because TTLL6 mislocalization and MT polyglutamylation are prevented; hence no spastin recruitment and no MT breakdown occur, enabling faster recovery. Reintroduction of Tau re-establishes Aβ-induced toxicity in TauKO neurons, which requires phosphorylation of Tau's KXGS motifs. Transgenic mice overexpressing Tau show TTLL6 translocalization into dendrites and decreased MT stability. The results provide a rationale for MT stabilization as a therapeutic approach.
Collapse
Affiliation(s)
- Hans Zempel
- DZNE, German Center for Neurodegenerative Diseases, Bonn, Germany
| | | | | | | | | | | | | |
Collapse
|
20
|
Simic D, Euler C, Thurby C, Peden M, Tannehill-Gregg S, Bunch T, Sanderson T, Van Vleet T. Assessing cell fusion and cytokinesis failure as mechanisms of clone 9 hepatocyte multinucleation in vitro. ACTA ACUST UNITED AC 2013; Chapter 14:Unit 14.9.1-17. [PMID: 22896007 DOI: 10.1002/0471140856.tx1409s53] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In this in vitro model of hepatocyte multinucleation, separate cultures of rat Clone 9 cells are labeled with either red or green cell tracker dyes (Red Cell Tracker CMPTX or Vybrant CFDA SE Cell Tracer), plated together in mixed-color colonies, and treated with positive or negative control agents for 4 days. The fluorescent dyes become cell-impermeant after entering cells and are not transferred to adjacent cells in a population, but are inherited by daughter cells after fusion. The mixed-color cultures are then evaluated microscopically for multinucleation and analysis of the underlying mechanism (cell fusion/cytokinesis). Multinucleated cells containing only one dye have undergone cytokinesis failure, whereas dual-labeled multinucleated cells have resulted from fusion.
Collapse
Affiliation(s)
- Damir Simic
- Drug Safety Evaluation, Bristol-Myers Squibb Co, Mount Vernon, Indiana, USA
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Johnson DT, Luong R, Lee SH, Peng Y, Shaltouki A, Lee JT, Lin D, Wang Y, Sun Z. Deletion of leucine zipper tumor suppressor 2 (Lzts2) increases susceptibility to tumor development. J Biol Chem 2012; 288:3727-38. [PMID: 23275340 DOI: 10.1074/jbc.m112.417568] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Using an Lzts2 knock-out mouse model, we characterized the biological role of Lzts2 in tumorigenesis. Both heterozygous and homozygous deletion of the Lzts2-targeted allele in mice shows an increased incidence in spontaneous tumor development, although Lzts2 homozygous knock-out mice show significantly higher incidences than heterozygous mice. Treatment of Lzts2-deficient mice with a carcinogen, N-butyl-N-(4-hydroxybutyl) nitrosamine, increases the susceptibility to N-butyl-N-(4-hydroxybutyl) nitrosamine-induced bladder carcinoma development. Examination of human prostate cancer tissue specimens shows a reduction of LZTS2 protein expression in prostate cancer cells. Further analyses of mouse embryonic fibroblasts isolated from Lzts2 knock-out embryos show that loss of Lzts2 enhances cell growth. These data provide the first line of evidence demonstrating that deletion of Lzts2 increases susceptibility to spontaneous and carcinogen-induced tumor development.
Collapse
Affiliation(s)
- Daniel T Johnson
- Department of Urology, Stanford University School of Medicine, Stanford, California 94305-5328, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Ghosh DK, Dasgupta D, Guha A. Models, Regulations, and Functions of Microtubule Severing by Katanin. ISRN MOLECULAR BIOLOGY 2012; 2012:596289. [PMID: 27335666 PMCID: PMC4890891 DOI: 10.5402/2012/596289] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 08/20/2012] [Indexed: 12/22/2022]
Abstract
Regulation of microtubule dynamics depends on stochastic balance between polymerization and severing process which lead to differential spatiotemporal abundance and distribution of microtubules during cell development, differentiation, and morphogenesis. Microtubule severing by a conserved AAA family protein Katanin has emerged as an important microtubule architecture modulating process in cellular functions like division, migration, shaping and so on. Regulated by several factors, Katanin manifests connective crosstalks in network motifs in regulation of anisotropic severing pattern of microtubule protofilaments in cell type and stage dependent way. Mechanisms of structural disintegration of microtubules by Katanin involve heterogeneous mechanochemical processes and sensitivity of microtubules to Katanin plays significant roles in mitosis/meiosis, neurogenesis, cilia/flagella formation, cell wall development and so on. Deregulated and uncoordinated expression of Katanin has been shown to have implications in pathophysiological conditions. In this paper, we highlight mechanistic models and regulations of microtubule severing by Katanin in context of structure and various functions of Katanin in different organisms.
Collapse
Affiliation(s)
- Debasish Kumar Ghosh
- Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur, Nadia 741252, India
| | - Debdeep Dasgupta
- Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur, Nadia 741252, India
| | - Abhishek Guha
- Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur, Nadia 741252, India
| |
Collapse
|
23
|
An essential role for katanin p80 and microtubule severing in male gamete production. PLoS Genet 2012; 8:e1002698. [PMID: 22654669 PMCID: PMC3359970 DOI: 10.1371/journal.pgen.1002698] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Accepted: 03/20/2012] [Indexed: 12/02/2022] Open
Abstract
Katanin is an evolutionarily conserved microtubule-severing complex implicated in multiple aspects of microtubule dynamics. Katanin consists of a p60 severing enzyme and a p80 regulatory subunit. The p80 subunit is thought to regulate complex targeting and severing activity, but its precise role remains elusive. In lower-order species, the katanin complex has been shown to modulate mitotic and female meiotic spindle dynamics and flagella development. The in vivo function of katanin p80 in mammals is unknown. Here we show that katanin p80 is essential for male fertility. Specifically, through an analysis of a mouse loss-of-function allele (the Taily line), we demonstrate that katanin p80, most likely in association with p60, has an essential role in male meiotic spindle assembly and dissolution and the removal of midbody microtubules and, thus, cytokinesis. Katanin p80 also controls the formation, function, and dissolution of a microtubule structure intimately involved in defining sperm head shaping and sperm tail formation, the manchette, and plays a role in the formation of axoneme microtubules. Perturbed katanin p80 function, as evidenced in the Taily mouse, results in male sterility characterized by decreased sperm production, sperm with abnormal head shape, and a virtual absence of progressive motility. Collectively these data demonstrate that katanin p80 serves an essential and evolutionarily conserved role in several aspects of male germ cell development. Microtubules are critical components of cells, acting as a “scaffold” for the movement of organelles and proteins within the cytoplasm. The control of microtubule length, number, and movement is essential for many cellular processes, including division, architecture, and migration. We have defined the role of the microtubule severing protein katanin p80 in male germ cell development. Male mice carrying a point mutation in the p80 gene are sterile as a consequence of low numbers of sperm, abnormal sperm morphology, and poor motility (ability to “swim”). We show that this mutation is associated with defects in microtubule structures involved in the division of immature sperm cells, in structures that shape the sperm head, and in the sperm tail, which is essential for sperm movement in the female reproductive tract. This study is the first to show that katanin p80, via its effects on microtubule dynamics within the testis, is required for male fertility.
Collapse
|
24
|
Abstract
ATP-dependent severing of microtubules was first reported in Xenopus laevis egg extracts in 1991. Two years later this observation led to the purification of the first known microtubule-severing enzyme, katanin. Katanin homologs have now been identified throughout the animal kingdom and in plants. Moreover, members of two closely related enzyme subfamilies, spastin and fidgetin, have been found to sever microtubules and might act alongside katanins in some contexts (Roll-Mecak and McNally, 2010; Yu et al., 2008; Zhang et al., 2007). Over the past few years, it has become clear that microtubule-severing enzymes contribute to a wide range of cellular activities including mitosis and meiosis, morphogenesis, cilia biogenesis and disassembly, and migration. Thus, this group of enzymes is revealing itself to be among the most important of the microtubule regulators. This Commentary focuses on our growing understanding of how microtubule-severing enzymes contribute to the organization and dynamics of diverse microtubule arrays, as well as the structural and biophysical characteristics that afford them the unique capacity to catalyze the removal of tubulin from the interior microtubule lattice. Our goal is to provide a broader perspective, focusing on a limited number of particularly informative, representative and/or timely findings.
Collapse
Affiliation(s)
- David J Sharp
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| | | |
Collapse
|
25
|
Bannon JH, O'Donovan DS, Kennelly SME, Mc Gee MM. The peptidyl prolyl isomerase cyclophilin A localizes at the centrosome and the midbody and is required for cytokinesis. Cell Cycle 2012; 11:1340-53. [PMID: 22421161 DOI: 10.4161/cc.19711] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Failed cytokinesis leads to tetraploidy, which is an important intermediate preceding aneuploidy and the onset of tumorigenesis. The centrosome is required for the completion of cytokinesis through the transport of important components to the midbody; however, the identity of molecular components and the mechanism involved remains poorly understood. In this study, we report that the peptidyl prolyl isomerase cyclophilin A (cypA) is a centrosome protein that undergoes cell cycle-dependent relocation to the midzone and midbody during cytokinesis in Jurkat cells implicating a role during division. Depletion of cypA does not disrupt mitotic spindle formation or progression through anaphase; however, it leads to cytokinesis defects through an inability to resolve intercellular bridges, culminating in delayed or failed cytokinesis. Defective cytokinesis is also evident by an increased prevalence of midbody-arrested cells. Expression of wild-type cypA reverses the cytokinesis defect in knockout cells, whereas an isomerase mutant does not, indicating that the isomerisation activity of cypA is required for cytokinesis. In contrast, wild-type cypA and the isomerase mutant localize to the centrosome and midbody, suggesting that localization to these structures is independent of isomerase activity. Depletion of cypA also generates tetraploid cells and supernumerary centrosomes. Finally, colony formation in soft agar is impaired in cypA-knockout cells, suggesting that cypA confers clonogenic advantage on tumor cells. Collectively, this data reveals a novel role for cypA isomerase activity in the completion of cytokinesis and the maintenance of genome stability.
Collapse
Affiliation(s)
- John H Bannon
- School of Biomolecular and Biomedical Science, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, Ireland
| | | | | | | |
Collapse
|
26
|
Ye X, Lee YC, Choueiri M, Chu K, Huang CF, Tsai WW, Kobayashi R, Logothetis CJ, Yu-Lee LY, Lin SH. Aberrant expression of katanin p60 in prostate cancer bone metastasis. Prostate 2012; 72:291-300. [PMID: 21681775 PMCID: PMC3179562 DOI: 10.1002/pros.21431] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Accepted: 05/09/2011] [Indexed: 12/27/2022]
Abstract
BACKGROUND Katanin p60 is a microtubule-severing protein and is involved in microtubule cytoskeleton organization in both mitotic and non-mitotic processes. Its role in cancer metastasis is unknown. METHODS Differential protein profiles of bone marrow aspirates were analyzed by chromatography, electrophoresis, and mass spectrometry. Expression of katanin p60 in primary and metastatic prostate cancer was examined by immunohistochemistry. Cellular function of katanin p60 was further examined in prostate cell lines. RESULTS In a proteomic profiling of bone marrow aspirates from men with prostate cancer, we found that katanin p60 was one of the proteins differentially expressed in bone metastasis samples. Immunohistochemical staining showed that katanin p60 was expressed in the basal cells in normal human prostate glands. In prostatic adenocarcinomas, in which the basal cells were absent, katanin p60 was expressed in the prostate cancer cells. In the specimens from bone metastasis, katanin p60 was detectable in the metastatic cancer cells. Strikingly, some of the metastatic cancer cells also co-expressed basal cell biomarkers including the tumor suppressor p53-homologous protein p63 and the high molecular weight cytokeratins, suggesting that the metastatic prostate cancer cells may have a basal cell-like phenotype. Moreover, overexpression of katanin p60 inhibited prostate cancer cell proliferation but enhanced cell migration activity. CONCLUSIONS Katanin p60 was aberrantly expressed during prostate cancer progression. Its expression in the metastatic cells in bone was associated with the re-emergence of a basal cell-like phenotype. The elevated katanin p60 expression may contribute to cancer cell metastasis via a stimulatory effect on cell motility.
Collapse
Affiliation(s)
- Xiangcang Ye
- Department of Cancer Biology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Yu-Chen Lee
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Michel Choueiri
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Khoi Chu
- Department of Genitourinary Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Chih-Fen Huang
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Wen-Wei Tsai
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Ryuji Kobayashi
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Christopher J. Logothetis
- Department of Genitourinary Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Li-Yuan Yu-Lee
- Department of Medicine, Baylor College of Medicine, Houston, Texas 77030
| | - Sue-Hwa Lin
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
- Department of Genitourinary Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| |
Collapse
|
27
|
Cytokinesis in bloodstream stage Trypanosoma brucei requires a family of katanins and spastin. PLoS One 2012; 7:e30367. [PMID: 22279588 PMCID: PMC3261199 DOI: 10.1371/journal.pone.0030367] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Accepted: 12/19/2011] [Indexed: 11/19/2022] Open
Abstract
Microtubule severing enzymes regulate microtubule dynamics in a wide range of organisms and are implicated in important cell cycle processes such as mitotic spindle assembly and disassembly, chromosome movement and cytokinesis. Here we explore the function of several microtubule severing enzyme homologues, the katanins (KAT80, KAT60a, KAT60b and KAT60c), spastin (SPA) and fidgetin (FID) in the bloodstream stage of the African trypanosome parasite, Trypanosoma brucei. The trypanosome cytoskeleton is microtubule based and remains assembled throughout the cell cycle, necessitating its remodelling during cytokinesis. Using RNA interference to deplete individual proteins, we show that the trypanosome katanin and spastin homologues are non-redundant and essential for bloodstream form proliferation. Further, cell cycle analysis revealed that these proteins play essential but discrete roles in cytokinesis. The KAT60 proteins each appear to be important during the early stages of cytokinesis, while downregulation of KAT80 specifically inhibited furrow ingression and SPA depletion prevented completion of abscission. In contrast, RNA interference of FID did not result in any discernible effects. We propose that the stable microtubule cytoskeleton of T. brucei necessitates the coordinated action of a family of katanins and spastin to bring about the cytoskeletal remodelling necessary to complete cell division.
Collapse
|
28
|
Peng Y, Clark C, Luong R, Tu WH, Lee J, Johnson DT, Das A, Carroll TJ, Sun Z. The leucine zipper putative tumor suppressor 2 protein LZTS2 regulates kidney development. J Biol Chem 2011; 286:40331-42. [PMID: 21949185 DOI: 10.1074/jbc.m111.302059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Members of the leucine zipper putative tumor suppressor (LZTS) family play crucial roles in transcription modulation and cell cycle control. We previously demonstrated that LZTS2 functions as a novel β-catenin-interacting protein and represses β-catenin-mediated transcription on T-cell factor/lymphoid enhancing factor. Here, we investigate the biological role of LZTS2 using newly established Lzts2 KO mice. Homozygosity for loss-of-function of the Lzts2-targeted allele resulted in severe kidney and urinary tract developmental defects, including renal/ureteral duplication, hydroureter, and hydronephrosis, which were visible prenatally. Altered ureteric bud outgrowth was identified in Lzts2 null embryos. Further analysis indicated that β-catenin subcellular localization was altered in fibroblasts isolated from Lzts2 null embryos. In addition, Wnt growth factor-induced β-catenin-mediated transcriptional activity was increased in Lzts2 null fibroblasts, suggesting a direct role for Lzts2 in the Wnt signaling pathway. These data demonstrate a critical role of LZTS2 in renal development and implicate LZTS2 as a critical regulator of β-catenin-mediated nephrogenesis.
Collapse
Affiliation(s)
- Yue Peng
- Department of Urology, Stanford University School of Medicine, Stanford, California 94305-5328, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Wickström SA, Masoumi KC, Khochbin S, Fässler R, Massoumi R. CYLD negatively regulates cell-cycle progression by inactivating HDAC6 and increasing the levels of acetylated tubulin. EMBO J 2010; 29:131-44. [PMID: 19893491 PMCID: PMC2775896 DOI: 10.1038/emboj.2009.317] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Accepted: 10/07/2009] [Indexed: 02/02/2023] Open
Abstract
CYLD is a tumour-suppressor gene that is mutated in a benign skin tumour syndrome called cylindromatosis. The CYLD gene product is a deubiquitinating enzyme that was shown to regulate cell proliferation, cell survival and inflammatory responses, mainly through inhibiting NF-kappaB signalling. Here we show that CYLD controls cell growth and division at the G(1)/S-phase as well as cytokinesis by associating with alpha-tubulin and microtubules through its CAP-Gly domains. Translocation of activated CYLD to the perinuclear region of the cell is achieved by an inhibitory interaction of CYLD with histone deacetylase-6 (HDAC6) leading to an increase in the levels of acetylated alpha-tubulin around the nucleus. This facilitates the interaction of CYLD with Bcl-3, leading to a significant delay in the G(1)-to-S-phase transition. Finally, CYLD also interacts with HDAC6 in the midbody where it regulates the rate of cytokinesis in a deubiquitinase-independent manner. Altogether these results identify a mechanism by which CYLD regulates cell proliferation at distinct cell-cycle phases.
Collapse
Affiliation(s)
- Sara A Wickström
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Katarzyna C Masoumi
- Department of Laboratory Medicine, Lund University, Malmö University Hospital, Malmö, Sweden
| | - Saadi Khochbin
- INSERM, U823, Université Joseph Fourier, Institut Albert Bonniot, Grenoble, France
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Ramin Massoumi
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
- Department of Laboratory Medicine, Clinical Research Center, Lund University, Malmö University Hospital, Malmö, Sweden
| |
Collapse
|
30
|
Abstract
Cytokinesis is the final step in cell division. The process begins during chromosome segregation, when the ingressing cleavage furrow begins to partition the cytoplasm between the nascent daughter cells. The process is not completed until much later, however, when the final cytoplasmic bridge connecting the two daughter cells is severed. Cytokinesis is a highly ordered process, requiring an intricate interplay between cytoskeletal, chromosomal and cell cycle regulatory pathways. A surprisingly broad range of additional cellular processes are also important for cytokinesis, including protein and membrane trafficking, lipid metabolism, protein synthesis and signaling pathways. As a highly regulated, complex process, it is not surprising that cytokinesis can sometimes fail. Cytokinesis failure leads to both centrosome amplification and production of tetraploid cells, which may set the stage for the development of tumor cells. However, tetraploid cells are abundant components of some normal tissues including liver and heart, indicating that cytokinesis is physiologically regulated. In this chapter, we summarize our current understanding of the mechanisms of cytokinesis, emphasizing steps in the pathway that may be regulated or prone to failure. Our discussion emphasizes findings in vertebrate cells although we have attempted to highlight important contributions from other model systems.
Collapse
|
31
|
Abstract
The role of aneuploidy in tumorigenesis remains poorly understood, although the two have been known to be linked for more than 100 years. Recent studies indicate that aneuploidy can promote tumour cell growth and cell death and that the cellular outcome is dependent on the extent of aneuploidy induced. The mitotic checkpoint plays a pivotal role in the maintenance of genome stability and has been the focus of work investigating the distinct outcomes of aneuploidy. In the present article, we review the molecular mechanisms involved and discuss the potential of the mitotic checkpoint as a therapeutic target in cancer therapy.
Collapse
|
32
|
Schmeisser MJ, Grabrucker AM, Bockmann J, Boeckers TM. Synaptic cross-talk between N-methyl-D-aspartate receptors and LAPSER1-beta-catenin at excitatory synapses. J Biol Chem 2009; 284:29146-57. [PMID: 19703901 DOI: 10.1074/jbc.m109.020628] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Memory formation in the brain is thought to be depending upon long lasting plastic changes of synaptic contacts that require alterations on the transcriptional level. Here, we characterize LAPSER1, a putative cytokinetic tumor suppressor that binds directly to ProSAP2/Shank3 and the synaptic Rap-Gap protein SPAR1 as a novel postsynaptic density component. Postsynaptic LAPSER1 is in complex with all important members of the canonical Wnt pathway including beta-catenin. Upon N-methyl-D-aspartate receptor-dependent activation, LAPSER1 and beta-catenin comigrate from the postsynaptic density to the nucleus and induce the transcription and translation of known beta-catenin target genes, including Tcfe2a and c-Myc. The nuclear export and cytoplasmic redistribution of beta-catenin is tightly regulated by LAPSER1. We postulate a postsynaptic cross-talk between N-methyl-D-aspartate receptors and a LAPSER1-beta-catenin complex that results in a self-regulated, synaptic activity-dependent expression of beta-catenin target genes. This calls for a novel role of Tcfe2a and c-Myc in plastic changes of neural tissue.
Collapse
|
33
|
Abstract
AbstractThe leucine zipper putative tumor suppressor (LZTS) 2 is frequently and specifically found in LOH (loss of heterozygosity) analysis in cancer. Different from other LZTS family members, it regulates the microtubule-severing protein Katanin by binding the p80 regulatory subunit of Katanin and inhibiting its interaction with microtubules. At specific phases of the cell cycle, LZTS2 suppresses cell migration and establishes proper central spindle assembly for cytokinesis. Importantly, those biological effects are mediated by the inhibitory activity of LZTS2 on Katanin. LZTS2 binding to Katanin also plays a role in Katanin transport to the midbody to control proper abscission. Therapeutic applications of the interaction between LZTS2 and Katanin in tumor cells are a potential area for future research.
Collapse
|
34
|
Sudo H, Maru Y. LAPSER1/LZTS2: a pluripotent tumor suppressor linked to the inhibition of katanin-mediated microtubule severing. Hum Mol Genet 2008; 17:2524-40. [DOI: 10.1093/hmg/ddn153] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|