1
|
Kou X, Yang X, Zhao Z, Li L. HSPA8-mediated stability of the CLPP protein regulates mitochondrial autophagy in cisplatin-resistant ovarian cancer cells. Acta Biochim Biophys Sin (Shanghai) 2024; 56:356-365. [PMID: 38419499 PMCID: PMC10984867 DOI: 10.3724/abbs.2023246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 08/07/2023] [Indexed: 03/02/2024] Open
Abstract
Currently, platinum agents remain the mainstay of chemotherapy for ovarian cancer (OC). However, cisplatin (DDP) resistance is a major reason for chemotherapy failure. Thus, it is extremely important to elucidate the mechanism of resistance to DDP. Here, we establish two DDP-resistant ovarian cancer cell lines and find that caseinolytic protease P (CLPP) level is significantly downregulated in DDP-resistant cell lines compared to wild-type ovarian cancer cell lines (SK-OV-3 and OVcar3). Next, we investigate the functions of CLPP in DDP-resistant and wild-type ovarian cancer cells using various assays, including cell counting kit-8 assay, western blot analysis, immunofluorescence staining, and detection of reactive oxygen species (ROS) and apoptosis. Our results show that CLPP knockdown significantly increases the half maximal inhibitory concentration (IC 50) and mitophagy of wild-type SK-OV-3 and OVcar3 cells, while CLPP overexpression reduces the IC 50 values and mitophagy of DDP-resistant SK-OV-3 and OVcar3 cells. Next, we perform database predictions and confirmation experiments, which show that heat shock protein family A member 8 (HSPA8) regulates CLPP protein stability. The dynamic effects of the HSPA8/CLPP axis in ovarian cancer cells are also examined. HSPA8 increases mitophagy and the IC 50 values of SK-OV-3 and OVcar3 cells but inhibits their ROS production and apoptosis. In addition, CLPP partly reverses the effects induced by HSPA8 in SK-OV-3 and OVcar3 cells. In conclusion, CLPP increases DDP resistance in ovarian cancer by inhibiting mitophagy and promoting cellular stress. Meanwhile, HSPA8 promotes the degradation of CLPP protein by regulating its stability.
Collapse
Affiliation(s)
- Xinxin Kou
- />Department of GynecologyCancer Hospital Affiliated to Zhengzhou UniversityZhengzhou450008China
| | - Xiaoxia Yang
- />Department of GynecologyCancer Hospital Affiliated to Zhengzhou UniversityZhengzhou450008China
| | - Zheng Zhao
- />Department of GynecologyCancer Hospital Affiliated to Zhengzhou UniversityZhengzhou450008China
| | - Lei Li
- />Department of GynecologyCancer Hospital Affiliated to Zhengzhou UniversityZhengzhou450008China
| |
Collapse
|
2
|
Zhang C, Wang Y, Wu G, Sun N, Bai H, Li X, Han S, Zhou H, Qi R, Zhang J. RPL35A promotes the progression of cholangiocarcinoma by mediating HSPA8 ubiquitination. Biol Direct 2024; 19:16. [PMID: 38395908 PMCID: PMC10885515 DOI: 10.1186/s13062-024-00453-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 01/09/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND Cholangiocarcinoma (CCA) is a biliary epithelial malignant tumor with an increasing incidence worldwide. Therefore, further understanding of the molecular mechanisms of CCA progression is required to identify new therapeutic targets. METHODS The expression of RPL35A in CCA and para-carcinoma tissues was detected by immunohistochemical staining. IP-MS combined with Co-IP identified downstream proteins regulated by RPL35A. Western blot and Co-IP of CHX or MG-132 treated CCA cells were used to verify the regulation of HSPA8 protein by RPL35A. Cell experiments and subcutaneous tumorigenesis experiments in nude mice were performed to evaluate the effects of RPL35A and HSPA8 on the proliferation, apoptosis, cell cycle, migration of CCA cells and tumor growth in vivo. RESULTS RPL35A was significantly upregulated in CCA tissues and cells. RPL35A knockdown inhibited the proliferation and migration of HCCC-9810 and HUCCT1 cells, induced apoptosis, and arrested the cell cycle in G1 phase. HSPA8 was a downstream protein of RPL35A and overexpressed in CCA. RPL35A knockdown impaired HSPA8 protein stability and increased HSPA8 protein ubiquitination levels. RPL35A overexpression promoted CCA cell proliferation and migration. HSPA8 knockdown inhibited CCA cell proliferation and migration, and reversed the promoting effect of RPL35A. Furthermore, RPL35A promoted tumor growth in vivo. In contrast, HSPA8 knockdown suppressed tumor growth, while was able to restore the effects of RPL35A overexpression. CONCLUSION RPL35A was upregulated in CCA tissues and promoted the progression of CCA by mediating HSPA8 ubiquitination.
Collapse
Affiliation(s)
- Chengshuo Zhang
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Yu Wang
- Department of General Surgery, Anshan Central Hospital, No.51, South Zhonghua Road, Tiedong District, 114008, Anshan, Liaoning Province, China
| | - Gang Wu
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Ning Sun
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Han Bai
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Xuejian Li
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Shuai Han
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Haonan Zhou
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China
| | - Ruizhao Qi
- Senior Department of General Surgery, the First Medical Center of Chinese PLA General Hospital, No.28, Fuxing Road, Haidian District, 100039, Beijing, China.
| | - Jialin Zhang
- Hepatobiliary Surgery Department, First Hospital of China Medical University, No.155, Nanjingbei street, 110001, Shenyang, Liaoning Province, P. R. China.
| |
Collapse
|
3
|
Bednarczyk M, Muc-Wierzgoń M, Dzięgielewska-Gęsiak S, Waniczek D. Relationship between the Ubiquitin-Proteasome System and Autophagy in Colorectal Cancer Tissue. Biomedicines 2023; 11:3011. [PMID: 38002011 PMCID: PMC10669458 DOI: 10.3390/biomedicines11113011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/04/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
BACKGROUND Dysregulation of the autophagy process via ubiquitin is associated with the occurrence of a number of diseases, including cancer. The present study analyzed the changes in the transcriptional activity of autophagy-related genes and the ubiquitination process (UPS) in colorectal cancer tissue. (2) Methods: The process of measuring the transcriptional activity of autophagy-related genes was analyzed by comparing colorectal cancer samples from four clinical stages I-IV (CS I-IV) of adenocarcinoma to the control (C). The transcriptional activity of genes associated with the UPS pathway was determined via the microarray technique (HG-U133A, Affymetrix). (3) Results: Of the selected genes, only PTEN-induced kinase 1 (PINK1) indicated statistical significance for all groups of colon cancer tissue transcriptome compared to the control. The transcriptional activity of the protein tyrosine phosphatase non-receptor type 22 (PTPN22) gene increased in all stages of the cancer, but the p-value was only less than 0.05 in CSIV vs. C. Forkhead box O1 (FOXO 1) and ubiquitin B (UBB) are statistically overexpressed in CSI. (4) Conclusions: The pathological expression changes in the studied proteins observed especially in the early stages of colorectal cancer suggest that the dysregulation of ubiquitination and autophagy processes occur during early neoplastic transformation. Stopping or slowing down the processes of removal of damaged proteins and their accumulation may contribute to tumor progression and poor prognosis.
Collapse
Affiliation(s)
- Martyna Bednarczyk
- Department of Hematology and Cancer Prevention, Medical University of Silesia in Katowice, 40-055 Katowice, Poland;
| | - Małgorzata Muc-Wierzgoń
- Department of Preventive Medicine, Medical University of Silesia in Katowice, 40-055 Katowice, Poland;
| | | | - Dariusz Waniczek
- Department of Surgical Nursing and Propaedeutics of Surgery, Medical University of Silesia in Katowice, 40-055 Katowice, Poland;
| |
Collapse
|
4
|
Ying B, Xu W, Nie Y, Li Y. HSPA8 Is a New Biomarker of Triple Negative Breast Cancer Related to Prognosis and Immune Infiltration. Disease Markers 2022; 2022:1-27. [DOI: 10.1155/2022/8446857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 10/13/2022] [Indexed: 11/22/2022]
Abstract
Objective. Triple negative breast cancer (TNBC) is a kind of cancer that endangers the lives of women all over the world in the 21st century. Heat shock protein member 8 (HSPA8) is the chaperone gene of the heat shock protein family. It is involved in many cellular functions. For example, it promotes the circulation between ATP and ADP, participates in protein folding, and can change the vitality of the cell and inhibit its growth. However, the abnormal expression of HSPA8 gene in TNBC and its diagnostic and prognostic significance still need to be further studied. Methods. First, we used related databases (such as TCGA, GEO, GTEx, ONCOMINE, TIMER2.0, UALCAN, HPA, STRING, CCLE, and Kaplan-Meier plotter databases) to analyze the relationship between HSPA8 and TNBC by bioinformatics. Then, the analysis using only a small part of the experimental work is used to explain our findings. For example, HSPA8 protein expression was evaluated by immunohistochemical method in TNBC tissues. Western blotting experiments were carried out to verify the results. Then, the clinicopathological characteristics of patients with TNBC were analyzed by R software and Cox regression analysis. On the basis, a nomogram is constructed to estimate the 1-, 3-, and 5-year overall survival (OS). The prognostic nomogram performance was calibrated and evaluated by the calibration curve and receiver operating characteristic (ROC) curve. Results. In the study, we analyzed the three GEO databases (including GSE86945, GSE106977, and GSE102088) and found that HSPA8 is one of the central genes of TNBC. Then, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) researches indicated that HSPA8 was mainly involved in partner-mediated autophagy, mRNA catabolism, neutrophil activation, immune response, protein targeting, RNA splicing, RNA catabolism, and other biological processes. Next, we used bioinformatics technology to find that the expression level of HSPA8 in breast cancer (BC) and TNBC samples was significantly higher than that in normal breast tissues, which was determined by analyzing hospital patient samples and related experiments. In addition, the expression level of HSPA8 in BC and TNBC samples was significantly correlated with clinical indexes such as TNM stage. The Cox analysis revealed that the expression of HSPA8 in TNBC had significant clinical prognostic value. The results of nomogram and ROC test show that HSPA8 has significant predictive ability in TNBC. The results of immune infiltration of HSPA8 through the TIMER2.0 database showed that there was a significant correlation between HSPA8 and immune cell subsets. Conclusions. Our results show that the expression of HSPA8 in TNBC has important clinical diagnostic significance and clarify the potential molecular mechanism that promotes the evolution of TNBC. The high expression of HSPA8 may be related with the poor clinical outcome of TNBC. This helps to provide us with a new direction of TNBC targeted therapy.
Collapse
|
5
|
Ragab N, Bauer J, Uhmann A, Marx A, Hahn H, Simon-Keller K. Tumor suppressive functions of WNT5A in rhabdomyosarcoma. Int J Oncol 2022; 61:102. [PMID: 35796028 PMCID: PMC9291248 DOI: 10.3892/ijo.2022.5392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 06/07/2022] [Indexed: 12/02/2022] Open
Abstract
Rhabdomyosarcoma (RMS) is a highly aggressive soft tissue malignancy that predominantly affects children. The main subtypes are alveolar RMS (ARMS) and embryonal RMS (ERMS) and the two show an impaired muscle differentiation phenotype. One pathway involved in muscle differentiation is WNT signaling. However, the role of this pathway in RMS is far from clear. Our recent data showed that the canonical WNT/β-Catenin pathway serves a subordinate role in RMS, whereas non-canonical WNT signaling probably is more important for this tumor entity. The present study investigated the role of WNT5A, which is the major ligand of non-canonical WNT signaling, in ERMS and ARMS. Gene expression analysis showed that WNT5A was expressed in human RMS samples and that its expression is more pronounced in ERMS. When stably overexpressed in RMS cell lines, WNT5A decreased proliferation and migration of the cells as demonstrated by BrdU incorporation and Transwell migration or scratch assay, respectively. WNT5A also decreased the self-renewal capacity and the expression of stem cell markers and modulates the levels of muscle differentiation markers as shown by sphere assay and western blot analysis, respectively. Finally, overexpression of WNT5A can destabilize active β-Catenin of RMS cells. A WNT5A knockdown has opposite effects. Together, the results suggest that WNT5A has tumor suppressive functions in RMS, which accompanies downregulation of β-Catenin.
Collapse
Affiliation(s)
- Nada Ragab
- Institute of Human Genetics, University Medical Center Göttingen, D‑37073 Göttingen, Germany
| | - Julia Bauer
- Institute of Human Genetics, University Medical Center Göttingen, D‑37073 Göttingen, Germany
| | - Anja Uhmann
- Institute of Human Genetics, University Medical Center Göttingen, D‑37073 Göttingen, Germany
| | - Alexander Marx
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, D‑68167 Mannheim, Germany
| | - Heidi Hahn
- Institute of Human Genetics, University Medical Center Göttingen, D‑37073 Göttingen, Germany
| | - Katja Simon-Keller
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, D‑68167 Mannheim, Germany
| |
Collapse
|
6
|
You X, Guo B, Wang Z, Ma H, Zhang X. Label-free quantitative proteomic analysis of serum exosomes from patients of renal anemia: The Good and the Bad of Roxadustat. Clin Proteomics 2022; 19:21. [PMID: 35690731 PMCID: PMC9187900 DOI: 10.1186/s12014-022-09358-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 05/19/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Roxadustat is a new oral anti-renal anemia medication that works by stabilizing hypoxia-inducible factor (HIF) which can activate the expression of more than 100 genes in addition to genes related to anemia. However, the more potential molecular targets of roxadustat are not completely clear. Therefore, it is essential to further reveal its molecular targets to guide its clinical applications. METHODS We performed label-free quantification and LC-MS/MS to study the proteomic alterations in serum exosome of renal anemia patients before and after roxadustat therapy. Results were validated by PRM. RESULTS A total of 30 proteins were significantly changed after treatment with roxadustat. Among these proteins, 18 proteins were up-regulated (and 12 were down-regulated). The results are statistically significant (P < 0.05). Then, we validated the result by PRM, the results confirmed that TFRC, HSPA8, ITGB3, COL1A2, and YWHAZ were markedly upregulated, while ITIH2 and CFH were significantly downregulated upon treatment with roxadustat. CONCLUSIONS TFRC and HSPA8 could be an important target of the action of roxadustat, and roxadustat may increase cardiovascular risk through its influence on platelet activation. Our results provide a theoretical basis for its wider clinical application and preventing expected side effects.
Collapse
Affiliation(s)
- Xiaoe You
- The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China
| | - Baochun Guo
- The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China.,Department of Nephrology, Shenzhen Peoples Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China.,Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China
| | - Zhen Wang
- The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China.,Department of Nephrology, Shenzhen Peoples Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China.,Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China
| | - Hualin Ma
- The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China.,Department of Nephrology, Shenzhen Peoples Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China.,Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China
| | - Xinzhou Zhang
- The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China. .,Department of Nephrology, Shenzhen Peoples Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China. .,Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital The Second Clinical Medical College, The First Affiliated Hospital, Jinan University, Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China.
| |
Collapse
|
7
|
Rai R, Kennedy AL, Isingizwe ZR, Javadian P, Benbrook DM. Similarities and Differences of Hsp70, hsc70, Grp78 and Mortalin as Cancer Biomarkers and Drug Targets. Cells 2021; 10:cells10112996. [PMID: 34831218 PMCID: PMC8616428 DOI: 10.3390/cells10112996] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 12/17/2022] Open
Abstract
Background: Upregulation of Heath Shock Protein 70 (HSP70) chaperones supports cancer cell survival. Their high homology causes a challenge to differentiate them in experimental or prevention and treatment strategies. The objective of this investigation was to determine similarities and differences of Hsp70, hsc70, Grp78 and Mortalin members of the HSP70 family encoded by HSPA1, HSPA8, HSPA5 and HSPA9 genes, respectively. Methods: Literature reviews were conducted using HSPA1, HSPA5, HSPA8 and HSPA9 gene or protein names or synonyms combined with biological or cancer-relevant terms. Ingenuity Pathway Analysis was used to identify and compare profiles of proteins that directly bind individual chaperones and their associated pathways. TCGA data was probed to identify associations of hsc70 with cancer patient survival. ClinicalTrials.gov was used to identify HSP70 family studies. Results: The chaperones have similar protein folding functions. Their different cellular effects are determined by co-chaperones and client proteins combined with their intra- and extra-cellular localizations. Their upregulation is associated with worse patient prognosis in multiple cancers and can stimulate tumor immune responses or drug resistance. Their inhibition selectively kills cancer over healthy cells. Conclusions: Differences in Hsp70, hsc70, Grp78 and mortalin provide opportunities to calibrate HSP70 inhibitors for individual cancers and combination therapies.
Collapse
Affiliation(s)
- Rajani Rai
- Gynecologic Oncology Section, Obstetrics and Gynecology Department, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (R.R.); (P.J.)
| | - Amy L. Kennedy
- Pathology Department, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
| | - Zitha Redempta Isingizwe
- Pharmaceutical Sciences Department, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
| | - Pouya Javadian
- Gynecologic Oncology Section, Obstetrics and Gynecology Department, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (R.R.); (P.J.)
| | - Doris Mangiaracina Benbrook
- Gynecologic Oncology Section, Obstetrics and Gynecology Department, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (R.R.); (P.J.)
- Pathology Department, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
- Pharmaceutical Sciences Department, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
- Correspondence: ; Tel.: +1-405-271-5523
| |
Collapse
|
8
|
Franco A, Gracia P, Colom A, Camino JD, Fernández-Higuero JÁ, Orozco N, Dulebo A, Saiz L, Cremades N, Vilar JMG, Prado A, Muga A. All-or-none amyloid disassembly via chaperone-triggered fibril unzipping favors clearance of α-synuclein toxic species. Proc Natl Acad Sci U S A 2021; 118:e2105548118. [PMID: 34462355 DOI: 10.1073/pnas.2105548118] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
α-synuclein aggregation is present in Parkinson's disease and other neuropathologies. Among the assemblies that populate the amyloid formation process, oligomers and short fibrils are the most cytotoxic. The human Hsc70-based disaggregase system can resolve α-synuclein fibrils, but its ability to target other toxic assemblies has not been studied. Here, we show that this chaperone system preferentially disaggregates toxic oligomers and short fibrils, while its activity against large, less toxic amyloids is severely impaired. Biochemical and kinetic characterization of the disassembly process reveals that this behavior is the result of an all-or-none abrupt solubilization of individual aggregates. High-speed atomic force microscopy explicitly shows that disassembly starts with the destabilization of the tips and rapidly progresses to completion through protofilament unzipping and depolymerization without accumulation of harmful oligomeric intermediates. Our data provide molecular insights into the selective processing of toxic amyloids, which is critical to identify potential therapeutic targets against increasingly prevalent neurodegenerative disorders.
Collapse
|
9
|
Abstract
Background Acute myeloid leukemia (AML) remains one of the most common hematological malignancies, posing a serious challenge to human health. HSPA8 is a chaperone protein that facilitates proper protein folding. It contributes to various activities of cell function and also is associated with various types of cancers. To date, the role of HSPA8 in AML is still undetermined. Methods In this study, public datasets available from the TCGA (Cancer Genome Atlas) and GEO (Gene Expression Omnibus) were mined to discover the association between the expression of HSPA8 and clinical phenotypes of CN-AML. A series of bioinformatics analysis methods, including functional annotation and miRNA-mRNA regulation network analysis, were employed to investigate the role of HSPA8 in CN-AML. Results HSPA8 was highly expressed in the AML patients compared to the healthy controls. The high HSPA8 expression had lower overall survival (OS) rate than those with low HSPA8 expression. High expression of HSPA8 was also an independent prognostic factor for overall survival (OS) of CN-AML patients by multivariate analysis. The differential expressed genes (DEGs) associated with HSPA8 high expression were identified, and they were enriched PI3k-Akt signaling, cAMP signaling, calcium signaling pathway. HSPA8 high expression was also positively associated with micro-RNAs (hsa-mir-1269a, hsa-mir-508-3p, hsa-mir-203a), the micro-RNAs targeted genes (VSTM4, RHOB, HOBX7) and key known oncogenes (KLF5, RAN, and IDH1), and negatively associated with tumor suppressors (KLF12, PRKG1, TRPS1, NOTCH1, RORA). Conclusions Our research revealed HSPA8 as a novel potential prognostic factor to predict the survival of CN-AML patients. Our data also revealed the possible carcinogenic mechanism and the complicated microRNA-mRNA network associated with the HSPA8 high expression in AML. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-021-08193-w.
Collapse
Affiliation(s)
- Jun Li
- Department of Hematology, Zhongda Hospita, Medical School of Southeast University, Institute of Hematology Southeast University, Nanjing, 210009, China
| | - Zheng Ge
- Department of Hematology, Zhongda Hospita, Medical School of Southeast University, Institute of Hematology Southeast University, Nanjing, 210009, China. .,Hershey Medical Center, Pennsylvania State University Medical College, Hershey, PA17033, USA.
| |
Collapse
|
10
|
Abstract
Chaperone-mediated autophagy (CMA) represents a specific way of lysosomal protein degradation and contrary to macro and microautophagy is independent of vesicles formation. The role of CMA in different physiopathological processes has been studied for several years. In cancer, alterations of the CMA principal components, Hsc70 and Lamp2A protein and mRNA levels, have been described in malignant cells. However, changes in the expression levels of these CMA components are not always associated with changes in CMA activity and their biological significance must be carefully interpreted case by case. The objective of this review is to discuss whether altering the CMA activity, CMA substrates or CMA components is accurate to avoid cancer progression. In particular, this review will discuss about the evidences in which alterations CMA components Lamp2A and Hsc70 are associated or not with changes in CMA activity in different cancer types. This analysis will help to better understand the role of CMA activity in cancer and to elucidate whether CMA can be considered as target for therapeutics. Further, it will help to define whether the attention of the investigation should be focused on Lamp2A and Hsc70 because they can have an independent role in cancer progression beyond of their participation in altered CMA activity.
Collapse
Affiliation(s)
- Javiera Rios
- Molecular and Cellular Pathology Laboratory, Dentistry Faculty, Institute in Dentistry Sciences, University of Chile, Santiago, Chile
| | - Alvaro Sequeida
- Molecular and Cellular Pathology Laboratory, Dentistry Faculty, Institute in Dentistry Sciences, University of Chile, Santiago, Chile
| | - Amelina Albornoz
- Fundación Ciencia & Vida, Santiago, Chile.,San Sebastian University, Santiago, Chile
| | - Mauricio Budini
- Molecular and Cellular Pathology Laboratory, Dentistry Faculty, Institute in Dentistry Sciences, University of Chile, Santiago, Chile.,Autophagy Research Center (ARC), Santiago, Chile
| |
Collapse
|
11
|
Sun G, Cao Y, Xu Y, Huai D, Chen P, Guo J, Li M, Dai Y. Overexpression of Hsc70 promotes proliferation, migration, and invasion of human glioma cells. J Cell Biochem 2019; 120:10707-10714. [PMID: 30816582 DOI: 10.1002/jcb.28362] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 11/29/2018] [Indexed: 12/29/2022]
Abstract
Migration and invasion are often recognized as the main reasons for the high recurrence and death rates of glioma and limit the efficacy of surgery and other antitumor therapies. In this study, we found over activation of heat shock cognate protein 70 (Hsc70) in human glioma specimens, which was closely related to glioma grade. We investigated whether Hsc70 induced the migration and invasion of glioma cells. Wound healing and transwell migration assay were used to determine the migration and invasion ability of human glioma U251 and U87 cells, in which the expression of Hsc70 was knocked down by small interfering RNA. Western blot analysis was performed to determine the expression of FAK-Src signaling in malignant glioma cells. The results showed that Hsc70 deficiency significantly retarded migration and invasion and reduced the phosphorylation of FAK, Src, and Pyk2 in U251 and U87 cells. Overall, our results indicate that the migration and invasion capacity of human brain glioma cells is at least partly induced by Hsc70-dependent activation of FAK-Src signaling.
Collapse
Affiliation(s)
- Guan Sun
- Department of Neurosurgery, Yancheng City No. 1 People's Hospital, The Fourth Affiliated Hospital of Nantong University, Yancheng, P. R. China
| | - Ying Cao
- Department of Ear-Nose-Throat, The Second People's Hospital of Huai'an, Huai'an Affiliated Hospital of Xuzhou Medical University, Huai'an, P. R. China
| | - Yitian Xu
- The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
| | - De Huai
- Department of Ear-Nose-Throat, The Second People's Hospital of Huai'an, Huai'an Affiliated Hospital of Xuzhou Medical University, Huai'an, P. R. China
| | - Ping Chen
- Department of Oncology, Yancheng City No. 1 People's Hospital, The Fourth Affiliated Hospital of Nantong University, Yancheng, P. R. China
| | - Jun Guo
- Department of Neurosurgery, Yancheng City No. 1 People's Hospital, The Fourth Affiliated Hospital of Nantong University, Yancheng, P. R. China
| | - Min Li
- Department of Neurosurgery, Jiangning Hospital Affiliated with Nanjing Medical University, Nanjing, P. R. China
| | - Yuyu Dai
- Department of Neurosurgery, Yancheng Third People's Hospital, Yancheng, P. R. China
| |
Collapse
|
12
|
Abstract
Cathepsins (CTS) are mainly lysosomal acid hydrolases extensively involved in the prognosis of different diseases, and having a distinct role in tumor progression by regulating cell proliferation, autophagy, angiogenesis, invasion, and metastasis. As all these processes conjunctively lead to cancer progression, their site-specific regulation might be beneficial for cancer treatment. CTS regulate activation of the proteolytic cascade and protein turnover, while extracellular CTS is involved in promoting extracellular matrix degradation and angiogenesis, thereby stimulating invasion and metastasis. Despite cancer regulation, the involvement of CTS in cellular adaptation toward chemotherapy and radiotherapy augments their therapeutic potential. However, lysosomal permeabilization mediated cytosolic translocation of CTS induces programmed cell death. This complex behavior of CTS generates the need to discuss the different aspects of CTS associated with cancer regulation. In this review, we mainly focused on the significance of each cathepsin in cancer signaling and their targeting which would provide noteworthy information in the context of cancer biology and therapeutics.
Collapse
Affiliation(s)
- Tejinder Pal Khaket
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Taeg Kyu Kwon
- Department of Immunology, School of Medicine, Keimyung University, Dalseo-Gu, Daegu 704-701, Republic of Korea.
| | - Sun Chul Kang
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
| |
Collapse
|
13
|
Magnadóttir B, Hayes P, Hristova M, Bragason BT, Nicholas AP, Dodds AW, Guðmundsdóttir S, Lange S. Post-translational protein deimination in cod (Gadus morhua L.) ontogeny novel roles in tissue remodelling and mucosal immune defences? Dev Comp Immunol 2018; 87:157-170. [PMID: 29908202 DOI: 10.1016/j.dci.2018.06.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 06/12/2018] [Accepted: 06/12/2018] [Indexed: 06/08/2023]
Abstract
Peptidylarginine deiminases (PADs) are calcium dependent enzymes with physiological and pathophysiological roles conserved throughout phylogeny. PADs promote post-translational deimination of protein arginine to citrulline, altering the structure and function of target proteins. Deiminated proteins were detected in the early developmental stages of cod from 11 days post fertilisation to 70 days post hatching. Deiminated proteins were present in mucosal surfaces and in liver, pancreas, spleen, gut, muscle, brain and eye during early cod larval development. Deiminated protein targets identified in skin mucosa included nuclear histones; cytoskeletal proteins such as tubulin and beta-actin; metabolic and immune related proteins such as galectin, mannan-binding lectin, toll-like receptor, kininogen, Beta2-microglobulin, aldehyde dehydrogenase, bloodthirsty and preproapolipoprotein A-I. Deiminated histone H3, a marker for anti-pathogenic neutrophil extracellular traps, was particularly elevated in mucosal tissues in immunostimulated cod larvae. PAD-mediated protein deimination may facilitate protein moonlighting, allowing the same protein to exhibit a range of biological functions, in tissue remodelling and mucosal immune defences in teleost ontogeny.
Collapse
Affiliation(s)
- Bergljót Magnadóttir
- Institute for Experimental Pathology, University of Iceland, Keldur v. Vesturlandsveg, 112 Reykjavik, Iceland.
| | - Polly Hayes
- Department of Biomedical Sciences, University of Westminster, London, W1W 6UW, UK.
| | - Mariya Hristova
- Perinatal Brain Protection and Repair Group, EGA Institute for Women's Health, University College London, WC1E 6HX, London, UK.
| | - Birkir Thor Bragason
- Institute for Experimental Pathology, University of Iceland, Keldur v. Vesturlandsveg, 112 Reykjavik, Iceland.
| | - Anthony P Nicholas
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Alister W Dodds
- MRC Immunochemistry Unit, Department of Biochemistry, University of Oxford, Oxford, UK.
| | - Sigríður Guðmundsdóttir
- Institute for Experimental Pathology, University of Iceland, Keldur v. Vesturlandsveg, 112 Reykjavik, Iceland.
| | - Sigrun Lange
- Tissue Architecture and Regeneration Research Group, Department of Biomedical Sciences, University of Westminster, London, W1W 6UW, UK.
| |
Collapse
|
14
|
Xie G, Hong WX, Zhou L, Yang X, Huang H, Wu D, Huang X, Zhu W, Liu J. An investigation of methyl tert‑butyl ether‑induced cytotoxicity and protein profile in Chinese hamster ovary cells. Mol Med Rep 2017; 16:8595-8604. [PMID: 29039499 PMCID: PMC5779912 DOI: 10.3892/mmr.2017.7761] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 11/15/2016] [Indexed: 11/23/2022] Open
Abstract
Methyl tert-butyl ether (MTBE) is widely used as an oxygenating agent in gasoline to reduce harmful emissions. However, previous studies have demonstrated that MTBE is a cytotoxic substance that has harmful effects in vivo and in vitro. Although remarkable progress has been made in elucidating the mechanisms underlying the MTBE-induced reproductive toxicological effect in different cell lines, the precise mechanisms remain far from understood. The present study aimed to evaluate whether mammalian ovary cells were sensitive to MTBE exposure in vitro by assessing cell viability, lactate dehydrogenase (LDH) leakage, malondialdehyde (MDA) content and antioxidant enzyme activities. In addition, the effect of MTBE exposure on differential protein expression profiles was examined by two-dimensional electrophoresis and matrix-assisted laser desorption/ionization-time of flight mass spectrometry. MTBE exposure induced significant effects on cell viability, LDH leakage, plasma membrane damage and the activity of antioxidant enzymes. In the proteomic analysis, 24 proteins were demonstrated to be significantly affected by MTBE exposure. Functional analysis indicated that these proteins were involved in catalytic activity, binding, structural molecule activity, metabolic processes, cellular processes and localization, highlighting the fact that the cytotoxic mechanisms resulting from MTBE exposure are complex and diverse. The altered expression levels of two representative proteins, heat shock protein family A (Hsp70) members 8 and 9, were further confirmed by western blot analysis. The results revealed that MTBE exposure affects protein expression in Chinese hamster ovary cells and that oxidative stress and altered protein levels constitute the mechanisms underlying MTBE-induced cytotoxicity. These findings provided novel insights into the biochemical mechanisms involved in MTBE-induced cytotoxicity in the reproductive system.
Collapse
Affiliation(s)
- Guangshan Xie
- Shenzhen Research Institute of Population and Family Planning, Shenzhen, Guangdong 518040, P.R. China
| | - Wen-Xu Hong
- Shenzhen Research Institute of Population and Family Planning, Shenzhen, Guangdong 518040, P.R. China
| | - Li Zhou
- Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong 518055, P.R. China
| | - Xifei Yang
- Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong 518055, P.R. China
| | - Haiyan Huang
- Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong 518055, P.R. China
| | - Desheng Wu
- Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong 518055, P.R. China
| | - Xinfeng Huang
- Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong 518055, P.R. China
| | - Weiguo Zhu
- Department of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P.R. China
| | - Jianjun Liu
- Shenzhen Research Institute of Population and Family Planning, Shenzhen, Guangdong 518040, P.R. China
| |
Collapse
|
15
|
Santos TG, Martins VR, Hajj GNM. Unconventional Secretion of Heat Shock Proteins in Cancer. Int J Mol Sci 2017; 18:E946. [PMID: 28468249 DOI: 10.3390/ijms18050946] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 04/25/2017] [Accepted: 04/27/2017] [Indexed: 12/17/2022] Open
Abstract
Heat shock proteins (HSPs) are abundant cellular proteins involved with protein homeostasis. They have both constitutive and inducible isoforms, whose expression levels are further increased by stress conditions, such as temperature elevation, reduced oxygen levels, infection, inflammation and exposure to toxic substances. In these situations, HSPs exert a pivotal role in offering protection, preventing cell death and promoting cell recovery. Although the majority of HSPs functions are exerted in the cytoplasm and organelles, several lines of evidence reveal that HSPs are able to induce cell responses in the extracellular milieu. HSPs do not possess secretion signal peptides, and their secretion was subject to widespread skepticism until the demonstration of the role of unconventional secretion forms such as exosomes. Secretion of HSPs may confer immune system modulation and be a cell-to-cell mediated form of increasing stress resistance. Thus, there is a wide potential for secreted HSPs in resistance of cancer therapy and in the development new therapeutic strategies.
Collapse
|
16
|
Mendoza A, Torrisi DM, Sell S, Cady NC, Lawrence DA. Grating coupled SPR microarray analysis of proteins and cells in blood from mice with breast cancer. Analyst 2017; 141:704-12. [PMID: 26539568 DOI: 10.1039/c5an01749a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Biomarker discovery for early disease diagnosis is highly important. Of late, much effort has been made to analyze complex biological fluids in an effort to develop new markers specific for different cancer types. Recent advancements in label-free technologies such as surface plasmon resonance (SPR)-based biosensors have shown promise as a diagnostic tool since there is no need for labeling or separation of cells. Furthermore, SPR can provide rapid, real-time detection of antigens from biological samples since SPR is highly sensitive to changes in surface-associated molecular and cellular interactions. Herein, we report a lab-on-a-chip microarray biosensor that utilizes grating-coupled surface plasmon resonance (GCSPR) and grating-coupled surface plasmon coupled fluorescence (GCSPCF) imaging to detect circulating tumor cells (CTCs) from a mouse model (FVB-MMTV-PyVT). GCSPR and GCSPCF analysis was accomplished by spotting antibodies to surface cell markers, cytokines and stress proteins on a nanofabricated GCSPR microchip and screening blood samples from FVB control mice or FVB-MMTV-PyVT mice with developing mammary carcinomas. A transgenic MMTV-PyVT mouse derived cancer cell line was also analyzed. The analyses indicated that CD24, CD44, CD326, CD133 and CD49b were expressed in both cell lines and in blood from MMTV-PyVT mice. Furthermore, cytokines such as IL-6, IL-10 and TNF-α, along with heat shock proteins HSP60, HSP27, HSc70(HSP73), HSP90 total, HSP70/HSc70, HSP90, HSP70, HSP90 alpha, phosphotyrosine and HSF-1 were overexpressed in MMTV-PyVT mice.
Collapse
Affiliation(s)
- A Mendoza
- Wadsworth Center, New York State Department of Health, 150 New Scotland Avenue, Albany, NY 12208, USA
| | - D M Torrisi
- Wadsworth Center, New York State Department of Health, 150 New Scotland Avenue, Albany, NY 12208, USA
| | - S Sell
- Wadsworth Center, New York State Department of Health, 150 New Scotland Avenue, Albany, NY 12208, USA
| | - N C Cady
- SUNY Polytechnic Institute, 257 Fuller Road, Albany, NY 12203, USA.
| | - D A Lawrence
- Wadsworth Center, New York State Department of Health, 150 New Scotland Avenue, Albany, NY 12208, USA
| |
Collapse
|
17
|
Vezenkov LL, Sanchez CA, Bellet V, Martin V, Maynadier M, Bettache N, Lisowski V, Martinez J, Garcia M, Amblard M, Hernandez JF. Structure-Activity Relationships of JMV4463, a Vectorized Cathepsin D Inhibitor with Antiproliferative Properties: The Unique Role of the AMPA-Based Vector. ChemMedChem 2015; 11:302-8. [DOI: 10.1002/cmdc.201500457] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/19/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Lubomir L. Vezenkov
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Clément A. Sanchez
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Virginie Bellet
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Vincent Martin
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Marie Maynadier
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Nadir Bettache
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Vincent Lisowski
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Jean Martinez
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Marcel Garcia
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Muriel Amblard
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Jean-François Hernandez
- Institut des Biomolécules Max Mousseron (IBMM); UMR5247 CNRS; Université de Montpellier; ENSCM, Faculté de Pharmacie; 15 avenue Charles Flahault 34093 Montpellier Cedex 5 France
| |
Collapse
|
18
|
Abstract
Cathepsin D has garnered increased attention in recent years, mainly since it has been associated with several human pathologies. In particular, cathepsin D is often overexpressed and hypersecreted in cancer cells, implying it may constitute a therapeutic target. However, cathepsin D can have both anti- and pro-survival functions depending on its proteolytic activity, cellular context and stress stimulus. Therefore, a more detailed understanding of cathepsin D regulation and how to modulate its apoptotic functions is clearly needed. In this review, we provide an overview of the role of cathepsin D in physiological and pathological scenarios. We then focus on the opposing functions of cathepsin D in apoptosis, particularly relevant in cancer research. Emphasis is given to the role of the yeast protease Pep4p, the vacuolar counterpart of cathepsin D, in life and death. Finally, we discuss how insights from yeast cathepsin D and its role in regulated cell death can unveil novel functions of mammalian cathepsin D in apoptosis and cancer.
Collapse
Affiliation(s)
- H Pereira
- CBMA- Centre of Molecular and Environmental Biology. Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - C S F Oliveira
- CBMA- Centre of Molecular and Environmental Biology. Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal. ; ICBAS - Institute of Biomedical Sciences Abel Salazar, University of Porto, 4050-313, Porto, Portugal
| | - L Castro
- CBMA- Centre of Molecular and Environmental Biology. Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - A Preto
- CBMA- Centre of Molecular and Environmental Biology. Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - S R Chaves
- CBMA- Centre of Molecular and Environmental Biology. Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - M Côrte-Real
- CBMA- Centre of Molecular and Environmental Biology. Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| |
Collapse
|
19
|
Tan AA, Phang WM, Gopinath SC, Hashim OH, Kiew LV, Chen Y. Revealing Glycoproteins in the Secretome of MCF-7 Human Breast Cancer Cells. Biomed Res Int 2015; 2015:453289. [PMID: 26167486 DOI: 10.1155/2015/453289] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 06/07/2015] [Indexed: 01/30/2023]
Abstract
Breast cancer is one of the major issues in the field of oncology, reported with a higher prevalence rate in women worldwide. In attempt to reveal the potential biomarkers for breast cancer, the findings of differentially glycosylated haptoglobin and osteonectin in previous study have drawn our attention towards glycoproteins of secretome from the MCF-7 cancer cell line. In the present study, further analyses were performed on the medium of MCF-7 cells by subjecting it to two-dimensional analyses followed by image analysis in contrast to the medium of human mammary epithelial cells (HMEpC) as a negative control. Carboxypeptidase A4 (CPA4), alpha-1-antitrypsin (AAT), haptoglobin (HP), and HSC70 were detected in the medium of MCF-7, while only CPA4 and osteonectin (ON) were detected in HMEpC medium. In addition, CPA4 was detected as upregulated in the MCF-7 medium. Further analysis by lectin showed that CPA4, AAT, HP, and HSC70 were secreted as N-glycan in the medium of MCF-7, with HP also showing differentially N-glycosylated isoforms. For the HMEpC, only CPA4 was detected as N-glycan. No O-glycan was detected in the medium of HMEpC but MCF-7 expressed O-glycosylated CPA4 and HSC70. All these revealed that glycoproteins could be used as glycan-based biomarkers for the prognosis of breast cancer.
Collapse
|
20
|
Chuang CK, Yang TH, Chen TH, Yang CF, Chen WJ. Heat shock cognate protein 70 isoform D is required for clathrin-dependent endocytosis of Japanese encephalitis virus in C6/36 cells. J Gen Virol 2014; 96:793-803. [PMID: 25502019 DOI: 10.1099/jgv.0.000015] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Japanese encephalitis virus (JEV), one of encephalitic flaviviruses, is naturally transmitted by mosquitoes. During infection, JEV generally enters host cells via receptor-mediated clathrin-dependent endocytosis that requires the 70 kDa heat-shock protein (Hsp70). Heat-shock cognate protein 70 (Hsc70) is one member of the Hsp70 family and is constitutively expressed; thus, it may be expressed under physiological conditions. In C6/36 cells, Hsc70 is upregulated in response to JEV infection. Since Hsc70 shows no relationship with viruses attaching to the cell surface, it probably does not serve as the receptor according to our results in the present study. In contrast, Hsc70 is evidently associated with virus penetration into the cell and resultant acidification of intracellular vesicles. It suggests that Hsc70 is highly involved in clathrin-mediated endocytosis, particularly at the late stage of viral entry into host cells. Furthermore, we found that Hsc70 is composed of at least three isoforms, including B, C and D; of these, isoform D helps JEV to penetrate C6/36 cells via clathrin-mediated endocytosis. This study provides relevant evidence that sheds light on the regulatory mechanisms of JEV infection in host cells, especially on the process of clathrin-mediated endocytosis.
Collapse
Affiliation(s)
- Ching-Kai Chuang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33332, Taiwan
| | - Tsong-Han Yang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33332, Taiwan
| | - Tien-Huang Chen
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33332, Taiwan
| | - Chao-Fu Yang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33332, Taiwan
| | - Wei-June Chen
- Department of Public Health and Parasitology, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33332, Taiwan.,Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan 33332, Taiwan
| |
Collapse
|
21
|
Abstract
Cancer is the final result of uninhibited cell growth that involves an enormous group of associated diseases. One major aspect of cancer is when cells attack adjacent components of the body and spread to other organs, named metastasis, which is the major cause of cancer-related mortality. In developing this process, metastatic cells must successfully negotiate a series of complex steps, including dissociation, invasion, intravasation, extravasation, and dormancy regulated by various signaling pathways. In this review, we will focus on the recent studies and collect a comprehensive encyclopedia in molecular basis of metastasis, and then we will discuss some new potential therapeutics which target the metastasis pathways. Understanding the new aspects on molecular mechanisms and signaling pathways controlling tumor cell metastasis is critical for the development of therapeutic strategies for cancer patients that would be valuable for researchers in both fields of molecular and clinical oncology.
Collapse
Affiliation(s)
- Ali Mohammad Alizadeh
- Cancer Research Center, Tehran University of Medical Sciences, Tehran, 1419733141, Iran,
| | | | | |
Collapse
|
22
|
Romanello M, Piatkowska E, Antoniali G, Cesaratto L, Vascotto C, Iozzo RV, Delneri D, Brancia FL. Osteoblastic cell secretome: a novel role for progranulin during risedronate treatment. Bone 2014; 58:81-91. [PMID: 24120669 PMCID: PMC5072534 DOI: 10.1016/j.bone.2013.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 09/19/2013] [Accepted: 10/01/2013] [Indexed: 11/25/2022]
Abstract
It is well established that osteoblasts, the key cells involved in bone formation during development and in adult life, secrete a number of glycoproteins harboring autocrine and paracrine functions. Thus, investigating the osteoblastic secretome could yield important information for the pathophysiology of bone. In the present study, we characterized for the first time the secretome of human Hobit osteoblastic cells. We discovered that the secretome comprised 89 protein species including the powerful growth factor progranulin. Recombinant human progranulin (6nM) induced phosphorylation of mitogen-activated protein kinase in both Hobit and osteocytic cells and induced cell proliferation and survival. Notably, risedronate, a nitrogen-containing bisphosphonate widely used in the treatment of osteoporosis, induced the expression and secretion of progranulin in the Hobit secretome. In addition, our proteomic study of the Hobit secretome revealed that risedronate induced the expression of ERp57, HSP60 and HSC70, three proteins already shown to be associated with the prevention of bone loss in osteoporosis. Collectively, our findings unveil novel targets of risedronate-evoked biological effects on osteoblast-like cells and further our understanding of the mechanisms of action of this currently used compound.
Collapse
Affiliation(s)
- Milena Romanello
- Laboratory of Regional Centre for Rare Diseases, University Hospital, Santa Maria della Misericordia, 33100 Udine, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Abstract
HSPA8/HSC70 protein is a fascinating chaperone protein. It represents a constitutively expressed, cognate protein of the HSP70 family, which is central in many cellular processes. In particular, its regulatory role in autophagy is decisive. We focused this review on HSC70 structure-function considerations and based on this, we put a particular emphasis on HSC70 targeting by small molecules and peptides in order to develop intervention strategies that deviate some of HSC70 properties for therapeutic purposes. Generating active biomolecules regulating autophagy via its effect on HSC70 can effectively be designed only if we understand the fine relationships between HSC70 structure and functions.
Collapse
Affiliation(s)
- François Stricher
- CNRS; Institut de Biologie Moléculaire et Cellulaire; Immunopathologie et Chimie Thérapeutique/Laboratory of Excellence Medalis; Strasbourg, France
| | | | | | | |
Collapse
|
24
|
Moghanibashi M, Rastgar Jazii F, Soheili ZS, Zare M, Karkhane A, Parivar K, Mohamadynejad P. Esophageal cancer alters the expression of nuclear pore complex binding protein Hsc70 and eIF5A-1. Funct Integr Genomics 2013; 13:253-60. [PMID: 23539416 DOI: 10.1007/s10142-013-0320-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 02/26/2013] [Accepted: 03/14/2013] [Indexed: 12/13/2022]
Abstract
Nuclear pore complex (NPC) is the only corridor for macromolecules exchange between nucleus and cytoplasm. NPC and its components, nucleoporins, play important role in the diverse physiological processes including macromolecule exchange, chromosome segregation, apoptosis and gene expression. Recent reports also suggest involvement of nucleoporins in carcinogenesis. Applying proteomics, we analyzed expression pattern of the NPC components in a newly established esophageal cancer cell line from Persia (Iran), the high-risk region for esophageal cancer. Our results indicate overexpression of Hsc70 and downregulation of subunit alpha type-3 of proteasome, calpain small subunit 1, and eIF5A-1. Among these proteins, Hsc70 and eIF5A-1 are in direct interaction with NPC and involved in the nucleocytoplasmic exchange. Hsc70 plays a critical role as a chaperone in the formation of a cargo-receptor complex in nucleocytoplasmic transport. On the other hand, it is an NPC-associated protein that binds to nucleoporins and contributes in recycling of the nucleocytoplasmic transport receptors in mammals and affects transport of proteins between nucleus and cytoplasm. The other nuclear pore interacting protein: eIF5A-1 binds to the several nucleoporins and participates in nucleocytoplasmic transport. Altered expression of Hsc70 and eIF5A-1 may cause defects in nucleocytoplasmic transport and play a role in esophageal carcinogenesis.
Collapse
Affiliation(s)
- Mehdi Moghanibashi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | | | | | | | | | | | | |
Collapse
|
25
|
Golubnitschaja O, Yeghiazaryan K, Costigliola V, Trog D, Braun M, Debald M, Kuhn W, Schild HH. Risk assessment, disease prevention and personalised treatments in breast cancer: is clinically qualified integrative approach in the horizon? EPMA J 2013; 4:6. [PMID: 23418957 PMCID: PMC3615949 DOI: 10.1186/1878-5085-4-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 12/29/2012] [Indexed: 12/21/2022]
Abstract
Breast cancer is a multifactorial disease. A spectrum of internal and external factors contributes to the disease promotion such as a genetic predisposition, chronic inflammatory processes, exposure to toxic compounds, abundant stress factors, a shift-worker job, etc. The cumulative effects lead to high incidence of breast cancer in populations worldwide. Breast cancer in the USA is currently registered with the highest incidence rates amongst all cancer related patient cohorts. Currently applied diagnostic approaches are frequently unable to recognise early stages in tumour development that impairs individual outcomes. Early diagnosis has been demonstrated to be highly beneficial for significantly enhanced therapy efficacy and possibly full recovery. Actual paper shows that the elaboration of an integrative diagnostic approach combining several levels of examinations creates a robust platform for the reliable risk assessment, targeted preventive measures and more effective treatments tailored to the person in the overall task of breast cancer management. The levels of examinations are proposed, and innovative technological approaches are described in the paper. The absolute necessity to create individual patient profiles and extended medical records is justified for the utilising by routine medical services. Expert recommendations are provided to promote further developments in the field.
Collapse
Affiliation(s)
- Olga Golubnitschaja
- Department of Radiology, Rheinische Friedrich-Wilhelms-University of Bonn, Sigmund-Freud-Str, 25, Bonn, 53105, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Qi L, Wang L, Huang J, Jiang M, Diao H, Zhou H, Li X, Jiang Z. Activated amelogenin Y-linked (AMELY) regulation and angiogenesis in human hepatocellular carcinoma by biocomputation. Oncol Lett 2013; 5:1075-1079. [PMID: 23426651 PMCID: PMC3576279 DOI: 10.3892/ol.2013.1122] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Accepted: 01/07/2013] [Indexed: 12/18/2022] Open
Abstract
In the present study, a comparison of the biological processes and gene ontology (GO) in human hepatocellular carcinoma (HCC) with high expression (fold change ≥2) of amelogenin Y-linked (AMELY)-activated upstream regulation networks with non-tumor hepatitis/cirrhotic tissues (HBV or HCV infection) with low expression of activated networks was performed. The principle biological processes involved in non-tumor hepatitis/cirrhotic tissues include positive regulation of mismatch repair, regulation of transcription from RNA polymerase II promoters, negative regulation of cell-cell adhesion, protein ubiquitinatin and protein catabolism. The main biological processes involved in the development of HCC include positive regulation of calcium ion transport into the cytosol, cell proliferation, DNA replication, fibroblast proliferation, immune response, microtubule polymerization and protein secretion. Specific transcription from RNA polymerase II promoters, regulation of angiogenesis, cell growth, protein metabolism, Wnt receptor signaling pathways, negative regulation of endothelial cell differentiation, microtubule depolymerization, peptidase activity and progression through the cell cycle are also involved. Positive regulation of transcription is involved in both processes. An activated AMELY-coupled upstream positive regulation of immune response-mediated protein secretion to Wnt signaling and calcium into cytosol-induced regulation of cell growth and angiogenesis in HCC is proposed. The AMELY upstream regulation molecular network model was constructed with BUB1B, CST6, ESM1, HOXA5, LEF1, MAPT, MYBL2, NOTCH3, PLA2G1B, PROK1, ROBO1, SCML2 and UBE2C in HCC from a Gene Expression Omnibus (GEO) dataset by gene regulation network inference methods and our programming methods.
Collapse
Affiliation(s)
- Lianxiu Qi
- Biomedical Center, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Liu T, Daniels CK, Cao S. Comprehensive review on the HSC70 functions, interactions with related molecules and involvement in clinical diseases and therapeutic potential. Pharmacol Ther. 2012;136:354-374. [PMID: 22960394 DOI: 10.1016/j.pharmthera.2012.08.014] [Citation(s) in RCA: 188] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 08/14/2012] [Indexed: 12/28/2022]
Abstract
Heat shock cognate protein 70 (HSC70) is a constitutively expressed molecular chaperone which belongs to the heat shock protein 70 (HSP70) family. HSC70 shares some of the structural and functional similarity with HSP70. HSC70 also has different properties compared with HSP70 and other heat shock family members. HSC70 performs its full functions by the cooperation of co-chaperones. It interacts with many other molecules as well and regulates various cellular functions. It is also involved in various diseases and may become a biomarker for diagnosis and potential therapeutic targets for design, discovery, and development of novel drugs to treat various diseases. In this article, we provide a comprehensive review on HSC70 from the literatures including the basic general information such as classification, structure and cellular location, genetics and function, as well as its protein association and interaction with other proteins. In addition, we also discussed the relationship of HSC70 and related clinical diseases such as cancer, cardiovascular, neurological, hepatic and many other diseases and possible therapeutic potential and highlight the progress and prospects of research in this field. Understanding the functions of HSC70 and its interaction with other molecules will help us to reveal other novel properties of this protein. Scientists may be able to utilize this protein as a biomarker and therapeutic target to make significant advancement in scientific research and clinical setting in the future.
Collapse
|
28
|
Duffy DJ, Millane RC, Frank U. A heat shock protein and Wnt signaling crosstalk during axial patterning and stem cell proliferation. Dev Biol 2012; 362:271-81. [PMID: 22155526 DOI: 10.1016/j.ydbio.2011.11.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Revised: 11/16/2011] [Accepted: 11/22/2011] [Indexed: 01/22/2023]
Abstract
Both Wnt signaling and heat shock proteins play important roles in development and disease. As such, they have been widely, though separately, studied. Here we show a link between a heat shock protein and Wnt signaling in a member of the basal phylum, Cnidaria. A heat shock at late gastrulation in the clonal marine hydrozoan, Hydractinia, interferes with axis development, specifically inhibiting head development, while aboral structures remain unaffected. The heat treatment upregulated Hsc71, a constitutive Hsp70 related gene, followed by a transient upregulation, and long-term downregulation, of Wnt signaling components. Downregulating Hsc71 by RNAi in heat-shocked animals rescued these defects, resulting in normal head development. Transgenic animals, ectopically expressing Hsc71, had similar developmental abnormalities as heat-shocked animals in terms of both morphology and Wnt3 expression. We also found that Hsc71 is upregulated in response to ectopic Wnt activation, but only in the context of stem cell proliferation and not in head development. Hsc71's normal expression is consistent with a conserved role in mitosis and apoptosis inhibition. Our results demonstrate a hitherto unknown crosstalk between heat shock proteins and Wnt/β-catenin signaling. This link likely has important implications in understanding normal development, congenital defects and cancer biology.
Collapse
|
29
|
Luo DX, Huang MC, Ma J, Gao Z, Liao DF, Cao D. Aldo-keto reductase family 1, member B10 is secreted through a lysosome-mediated non-classical pathway. Biochem J 2011; 438:71-80. [PMID: 21585341 DOI: 10.1042/BJ20110111] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
AKR1B10 (aldo-keto reductase family 1, member B10) protein is primarily expressed in normal human small intestine and colon, but overexpressed in several types of human cancers and considered as a tumour marker. In the present study, we found that AKR1B10 protein is secreted from normal intestinal epithelium and cultured cancer cells, as detected by a newly developed sandwich ELISA and Western blotting. The secretion of AKR1B10 was not affected by the protein-synthesis inhibitor cycloheximide and the classical protein-secretion pathway inhibitor brefeldin A, but was stimulated by temperature, ATP, Ca(2+) and the Ca(2+) carrier ionomycin, lysosomotropic NH(4)Cl, the G-protein activator GTPγS and the G-protein coupling receptor N-formylmethionyl-leucyl-phenylalanine. The ADP-ribosylation factor inhibitor 2-(4-fluorobenzoylamino)-benzoic acid methyl ester and the phospholipase C inhibitor U73122 inhibited the secretion of AKR1B10. In cultured cells, AKR1B10 was present in lysosomes and was secreted with cathepsin D, a lysosomal marker. In the intestine, AKR1B10 was specifically expressed in mature epithelial cells and secreted into the lumen at 188.6-535.7 ng/ml of ileal fluids (mean=298.1 ng/ml, n=11). Taken together, our results demonstrate that AKR1B10 is a new secretory protein belonging to a lysosome-mediated non-classical protein-secretion pathway and is a potential serum marker.
Collapse
|
30
|
Masson O, Bach AS, Derocq D, Prébois C, Laurent-Matha V, Pattingre S, Liaudet-Coopman E. Pathophysiological functions of cathepsin D: Targeting its catalytic activity versus its protein binding activity? Biochimie 2010; 92:1635-43. [DOI: 10.1016/j.biochi.2010.05.009] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Accepted: 05/14/2010] [Indexed: 11/27/2022]
|
31
|
Guo CW, Xiong S, Liu G, Wang YF, He QY, Zhang XE, Zhang ZP, Ge F, Kitazato K. Proteomic analysis reveals novel binding partners of MIP-T3 in human cells. Proteomics 2010; 10:2337-47. [PMID: 20391533 DOI: 10.1002/pmic.201000130] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
MIP-T3 (microtubule-interacting protein associated with TRAF3) is a microtubule-interacting protein that evolutionarily conserved from worms to humans, but whose cellular functions remains unknown. To get insight into the functions of MIP-T3, we set out to identify MIP-T3 interacting proteins by immunoprecipitation in human embryonic kidney 293 cells and MS analysis. As the results, a total of 34 proteins were identified and most of them were novel MIP-T3 putative partners. The MIP-T3-associated proteins could be grouped into nine clusters based on their molecule functions, including cytoskeleton, chaperone, nucleic acid binding, kinase and so on. Three MIP-T3-interacted proteins - actin, HSPA8 and tubulin - were further confirmed by reciprocal coimmunoprecipitations and colocalization analysis. The interaction of MIP-T3 with both actin filaments and microtubule suggested that MIP-T3 may play an important role in regulation of cytoskeleton dynamics in cells. Our results therefore not only uncover a large number of MIP-T3-associated proteins that possess a variety of cellular functions, but also provide new research directions for the study of the functions of MIP-T3.
Collapse
Affiliation(s)
- Chao-Wan Guo
- Division of Molecular Pharmacology of Infectious agents, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki City, Nagasaki, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Henderson B, Pockley AG. Molecular chaperones and protein-folding catalysts as intercellular signaling regulators in immunity and inflammation. J Leukoc Biol 2010; 88:445-62. [PMID: 20445014 DOI: 10.1189/jlb.1209779] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
This review critically examines the hypothesis that molecular chaperones and protein-folding catalysts from prokaryotes and eukaryotes can be secreted by cells and function as intercellular signals, principally but not exclusively, for leukocytes. A growing number of molecular chaperones have been reported to function as ligands for selected receptors and/or receptors for specific ligands. Molecular chaperones initially appeared to act primarily as stimulatory signals for leukocytes and thus, were seen as proinflammatory mediators. However, evidence is now emerging that molecular chaperones can have anti-inflammatory actions or, depending on the protein and concentration, anti- and proinflammatory functions. Recasting the original hypothesis, we propose that molecular chaperones and protein-folding catalysts are "moonlighting" proteins that function as homeostatic immune regulators but may also under certain circumstances, contribute to tissue pathology. One of the key issues in the field of molecular chaperone biology relates to the role of microbial contaminants in their signaling activity; this too will be evaluated critically. The most fascinating aspect of molecular chaperones probably relates to evidence for their therapeutic potential in human disease, and ongoing studies are evaluating this potential in a range of clinical settings.
Collapse
Affiliation(s)
- Brian Henderson
- Department of Microbial Diseases, UCL-Eastman Dental Institute, University College London, 256 Gray's Inn Rd., London, WC1X 8LD, UK.
| | | |
Collapse
|