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Ren Z, Yang X, Ku T, Liu QS, Liang J, Zhou Q, Faiola F, Jiang G. Perfluorinated iodine alkanes promote the differentiation of mouse embryonic stem cells by regulating estrogen receptor signaling. J Environ Sci (China) 2024; 137:443-454. [PMID: 37980029 DOI: 10.1016/j.jes.2023.02.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 02/09/2023] [Accepted: 02/13/2023] [Indexed: 11/20/2023]
Abstract
Investigating the development toxicity of perfluorinated iodine alkanes (PFIs) is critical, given their estrogenic effects through binding with estrogen receptors (ERs). In the present study, two PFIs, including dodecafluoro-1,6-diiodohexane (PFHxDI) and tridecafluorohexyl iodide (PFHxI), with binding preference to ERα and ERβ, respectively, were selected to evaluate their effects on proliferation and differentiation of the mouse embryonic stem cells (mESCs). The results revealed that, similar to E2, 50 µmol/L PFHxDI accelerated the cell proliferation of the mESCs. The PFI stimulation at the exposure concentrations of 2-50 µmol/L promoted the differentiation of the mESCs as characterized by the upregulation of differentiation-related biomarkers (i.e., Otx2 and Dnmt3β) and downregulation of pluripotency genes (i.e., Oct4, Nanog, Sox2, Prdm14 and Rex1). Comparatively, PFHxDI exhibited higher induction effect on the differentiation of the mESCs than did PFHxI. The tests on ER signaling indicated that both PFI compounds induced exposure concentration-dependent expressions of ER signaling-related biomarkers (i.e., ERα, ERβ and Caveolin-1) in the mESCs, and the downstream ER responsive genes (i.e., c-fos, c-myc and c-jun) well responded to PFHxI stimulation. The role of ER in PFI-induced effects on the mESCs was further validated by the antagonistic experiments using an ER inhibitor (ICI). The findings demonstrated that PFIs triggered ER signaling, and perturbed the differentiation program of the mESCs, causing the potential health risk during early stage of development.
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Affiliation(s)
- Zhihua Ren
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan 030006, China
| | - Xiaoxi Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Tingting Ku
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan 030006, China
| | - Qian S Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jiefeng Liang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Sino-Danish, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qunfang Zhou
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Francesco Faiola
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
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Zhang R, Wang H, Xiao J, Lu J, Li M, Zhou Y, Sun H, Liu L, Huang T, Zhao Q. CAV1 Impacts the Tumor Immune Microenvironment and Has Potential Value of Predicting Response to Immunotherapy in Esophageal Cancer. DNA Cell Biol 2023; 42:27-42. [PMID: 36638349 DOI: 10.1089/dna.2022.0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Caveolin-1 (CAV1) is one of the members of the caveolae, and the role of CAV1 in esophageal cancer (ESCA) is not completely clear. In this study, we found that expression of CAV1 was downregulated in ESCA in The Cancer Genome Atlas and the Genotype-Tissue Expression (GTEx) database and we also use immunohistochemistry of tissue microarray for verification. Then, we used bioinformatics methods to investigate the prognostic value of CAV1, influence on immune cell infiltration in tumor microenvironment (TME) and responding to immunotherapy in ESCA. Our result indicated that CAV1 designs an inflamed TME in ESCA based on the evidence that CAV1 positively correlated with immunomodulators, immune score, stomal score, cancer immunity cycles, tumor-infiltrating immune cells, T cell inflamed score, and immune checkpoints. Immunophenoscore, Tumor Immune Dysfunction and Exclusion algorithms, and the mutation analysis show that the downregulated CAV1 expression indicated higher tumor mutation burden and higher rate of response to immune checkpoint inhibitors (ICIs) in the low-expression group. In a word, our study demonstrated the impact of CAV1 to the TME in ESCA and it may be a new target for ESCA immunotherapy. In addition, the expression of CAV1 can predict the clinical response to ICIs, which may provide clinical treatment guidance.
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Affiliation(s)
- Runan Zhang
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China
| | - Haizhou Wang
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China
| | - Jun Xiao
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China
| | - Jie Lu
- Hubei Aerospace Hospital, Xiaogan, Hubei, China
| | - Menglin Li
- Hubei Aerospace Hospital, Xiaogan, Hubei, China
| | - You Zhou
- Hubei Aerospace Hospital, Xiaogan, Hubei, China
| | - He Sun
- Hubei Aerospace Hospital, Xiaogan, Hubei, China
| | - Lan Liu
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China
| | | | - Qiu Zhao
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China.,Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China
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Lai X, Guo Y, Chen M, Wei Y, Yi W, Shi Y, Xiong L. Caveolin1: its roles in normal and cancer stem cells. J Cancer Res Clin Oncol 2021; 147:3459-3475. [PMID: 34498146 DOI: 10.1007/s00432-021-03793-2] [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: 03/11/2021] [Accepted: 09/03/2021] [Indexed: 12/09/2022]
Abstract
PURPOSE Stem cells are characterized by the capability of self-renewal and multi-differentiation. Normal stem cells, which are important for tissue repair and tissue regeneration, can be divided into embryonic stem cells (ESCs) and somatic stem cells (SSCs) depending on their origin. As a subpopulation of cells within cancer, cancer stem cells (CSCs) are at the root of therapeutic resistance. Tumor-initiating cells (TICs) are necessary for tumor initiation. Caveolin1 (Cav1), a membrane protein located at the caveolae, participates in cell lipid transport, cell migration, cell proliferation, and cell signal transduction. The purpose of this review was to explore the relationship between Cav1 and stem cells. RESULTS In ESCs, Cav1 is beneficial for self-renewal, proliferation, and migration. In SSCs, Cav1 exhibits positive or/and negative effects on stem cell self-renewal, differentiation, proliferation, migration, and angiogenic capacity. Cav1 deficiency impairs normal stem cell-based tissue repair. In CSCs, Cav1 inhibits or/and promotes CSC self-renewal, differentiation, invasion, migration, tumorigenicity ability, and CSC formation. And suppressing Cav1 promotes chemo-sensitivity in CSCs and TICs. CONCLUSION Cav1 shows dual roles in stem cell biology. Targeting the Cav1-stem cell axis would be a new way for tissue repair and cancer drug resistance.
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Affiliation(s)
- Xingning Lai
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China.,Second Clinical Medical College, Nanchang University, Nanchang, 330006, China
| | - Yiling Guo
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China.,Second Clinical Medical College, Nanchang University, Nanchang, 330006, China
| | - Miaomiao Chen
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China.,First Clinical Medical College, Nanchang University, Nanchang, 330006, China
| | - Yuxuan Wei
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China.,Queen Mary School, Jiangxi Medical College of Nanchang University, Nanchang, 330006, China
| | - Wanting Yi
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China.,First Clinical Medical College, Nanchang University, Nanchang, 330006, China
| | - Yubo Shi
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China.,Queen Mary School, Jiangxi Medical College of Nanchang University, Nanchang, 330006, China
| | - Lixia Xiong
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang, China. .,Jiangxi Province Key Laboratory of Tumor Pathogenesis and Molecular Pathology, Nanchang, 330006, China.
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Sosa LDV, Petiti JP, Picech F, Chumpen S, Nicola JP, Perez P, De Paul A, Valdez-Taubas J, Gutierrez S, Torres AI. The ERα membrane pool modulates the proliferation of pituitary tumours. J Endocrinol 2019; 240:229-241. [PMID: 30400032 DOI: 10.1530/joe-18-0418] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 10/31/2018] [Indexed: 01/22/2023]
Abstract
The molecular mechanisms underlying the ERα nuclear/cytoplasmic pool that modulates pituitary cell proliferation have been widely described, but it is still not clear how ERα is targeted to the plasma membrane. The aim of this study was to analyse ERα palmitoylation and the plasma membrane ERα (mERα) pool, and their participation in E2-triggered membrane-initiated signalling in normal and pituitary tumour cell growth. Cell cultures were prepared from anterior pituitaries of female Wistar rats and tumour GH3 cells, and treated with 10 nM of oestradiol (E2). The basal expression of ERα was higher in tumour GH3 than in normal pituitary cells. Full-length palmitoylated ERα was observed in normal and pituitary tumour cells, demonstrating that E2 stimulation increased both, ERα in plasma membrane and ERα and caveolin-1 interaction after short-term treatment. In addition, the Dhhc7 and Dhhc21 palmitoylases were negatively regulated after sustained stimulation of E2 for 3 h. Although the uptake of BrdU into the nucleus in normal pituitary cells was not modified by E2, a significant increase in the GH3 tumoural cell, as well as ERK1/2 activation, with this effect being mimicked by PPT, a selective antagonist of ERα. These proliferative effects were blocked by ICI 182780 and the global inhibitor of palmitoylation. These findings indicate that ERα palmitoylation modulated the mERα pool and consequently the ERK1/2 pathway, thereby contributing to pituitary tumour cell proliferation. These results suggest that the plasma membrane ERα pool might be related to the proliferative behaviour of prolactinoma and may be a marker of pituitary tumour growth.
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Affiliation(s)
- Liliana Del V Sosa
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
| | - Juan P Petiti
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
| | - Florencia Picech
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
| | - Sabrina Chumpen
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, CIQUIBIC-CONICET, Cordoba, Argentina
| | - Juan P Nicola
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, CIBICI-CONICET, Cordoba, Argentina
| | - Pablo Perez
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
| | - Ana De Paul
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
| | - Javier Valdez-Taubas
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, CIQUIBIC-CONICET, Cordoba, Argentina
| | - Silvina Gutierrez
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
| | - Alicia I Torres
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica - Consejo Nacional de Investigaciones Científicas Técnicas (CONICET) Instituto de Investigaciones en Ciencias de la Salud, Córdoba, Argentina
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Sohn J, Lin H, Fritch MR, Tuan RS. Influence of cholesterol/caveolin-1/caveolae homeostasis on membrane properties and substrate adhesion characteristics of adult human mesenchymal stem cells. Stem Cell Res Ther 2018; 9:86. [PMID: 29615119 PMCID: PMC5883280 DOI: 10.1186/s13287-018-0830-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/03/2018] [Accepted: 03/08/2018] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Adult mesenchymal stem cells (MSCs) are an important resource for tissue growth, repair, and regeneration. To utilize MSCs more effectively, a clear understanding of how they react to environmental cues is essential. Currently, relatively little is known about how the composition of the plasma membranes affects stem cell phenotype and properties. The presence of lipid molecules, including cholesterol in particular, in the plasma membrane plays a crucial role in regulating a variety of physiological processes in cells. In this study, we examined the effects of perturbations in cholesterol/caveolin-1 (CAV-1)/caveolae homeostasis on the membrane properties and adhesive characteristics of MSCs. Findings from this study will contribute to the understanding of how cholesterol/CAV-1/caveolae regulates aspects of the cell membrane important to cell adhesion, substrate sensing, and microenvironment interaction. METHODS We generated five experimental MSC groups: 1) untreated MSCs; 2) cholesterol-depleted MSCs; 3) cholesterol-supplemented MSCs; 4) MSCs transfected with control, nonspecific small interfering (si)RNA; and 5) MSCs transfected with CAV-1 siRNA. Each cell group was analyzed for perturbation of cholesterol status and CAV-1 expression by performing Amplex Red cholesterol assay, filipin fluorescence staining, and real-time polymerase chain reaction (PCR). The membrane fluidity in the five experimental cell groups were measured using pyrene fluorescence probe staining followed by FACS analysis. Cell adhesion to collagen and fibronectin as well as cell surface integrin expression were examined. RESULTS Cholesterol supplementation to MSCs increased membrane cholesterol, and resulted in decreased membrane fluidity and localization of elevated numbers of caveolae and CAV-1 to the cell membrane. These cells showed increased expression of α1, α4, and β1 integrins, and exhibited higher adhesion rates to fibronectin and collagen. Conversely, knockdown of CAV-1 expression or cholesterol depletion on MSCs caused a parallel decrease in caveolae content and an increase in membrane fluidity due to decreased delivery of cholesterol to the cell membrane. Cells with depleted CAV-1 expression showed decreased cell surface integrin expression and slower adhesion to different substrates. CONCLUSIONS Our results demonstrate that perturbations in cholesterol/CAV-1 levels significantly affect the membrane properties of MSCs. These findings suggest that modification of membrane cholesterol and/or CAV-1 and caveolae may be used to manipulate the biological activities of MSCs.
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Affiliation(s)
- Jihee Sohn
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, 450 Technology Drive, Room 221, Pittsburgh, PA, 15219, USA
| | - Hang Lin
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, 450 Technology Drive, Room 221, Pittsburgh, PA, 15219, USA
| | - Madalyn Rose Fritch
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, 15219, USA
| | - Rocky S Tuan
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, 450 Technology Drive, Room 221, Pittsburgh, PA, 15219, USA. .,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, 15219, USA.
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Russo-Abrahão T, Lacerda-Abreu MA, Gomes T, Cosentino-Gomes D, Carvalho-de-Araújo AD, Rodrigues MF, de Oliveira ACL, Rumjanek FD, Monteiro RDQ, Meyer-Fernandes JR. Characterization of inorganic phosphate transport in the triple-negative breast cancer cell line, MDA-MB-231. PLoS One 2018; 13:e0191270. [PMID: 29415049 PMCID: PMC5802448 DOI: 10.1371/journal.pone.0191270] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 01/02/2018] [Indexed: 12/05/2022] Open
Abstract
Background Recent studies demonstrate that interstitial inorganic phosphate is significantly elevated in the breast cancer microenvironment as compared to normal tissue. In addition it has been shown that breast cancer cells express high levels of the NaPi-IIb carrier (SLC34A2), suggesting that this carrier may play a role in breast cancer progression. However, the biochemical behavior of inorganic phosphate (Pi) transporter in this cancer type remains elusive. Methods In this work, we characterize the kinetic parameters of Pi transport in the aggressive human breast cancer cell line, MDA-MB-231, and correlated Pi transport with cell migration and adhesion. Results We determined the influence of sodium concentration, pH, metabolic inhibitors, as well as the affinity for inorganic phosphate in Pi transport. We observed that the inorganic phosphate is dependent on sodium transport (K0,5 value = 21.98 mM for NaCl). Furthermore, the transport is modulated by different pH values and increasing concentrations of Pi, following the Michaelis-Menten kinetics (K0,5 = 0.08 mM Pi). PFA, monensin, furosemide and ouabain inhibited Pi transport, cell migration and adhesion. Conclusions Taken together, these results showed that the uptake of Pi in MDA-MB-231 cells is modulated by sodium and by regulatory mechanisms of intracellular sodium gradient. General Significance: Pi transport might be regarded as a potential target for therapy against tumor progression.
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Affiliation(s)
- Thais Russo-Abrahão
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ, Brazil
| | - Marco Antônio Lacerda-Abreu
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ, Brazil
| | - Tainá Gomes
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Daniela Cosentino-Gomes
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ, Brazil
| | - Ayra Diandra Carvalho-de-Araújo
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ, Brazil
| | - Mariana Figueiredo Rodrigues
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ana Carolina Leal de Oliveira
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Franklin David Rumjanek
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Robson de Queiroz Monteiro
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - José Roberto Meyer-Fernandes
- Instituto de Bioquímica Médica Leopoldo De Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, Rio de Janeiro, RJ, Brazil
- * E-mail:
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Wang Z, Wang N, Liu P, Peng F, Tang H, Chen Q, Xu R, Dai Y, Lin Y, Xie X, Peng C, Situ H. Caveolin-1, a stress-related oncotarget, in drug resistance. Oncotarget 2016; 6:37135-50. [PMID: 26431273 PMCID: PMC4741920 DOI: 10.18632/oncotarget.5789] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 09/08/2015] [Indexed: 12/28/2022] Open
Abstract
Caveolin-1 (Cav-1) is both a tumor suppressor and an oncoprotein. Cav-1 overexpression was frequently confirmed in advanced cancer stages and positively associated with ABC transporters, cancer stem cell populations, aerobic glycolysis activity and autophagy. Cav-1 was tied to various stresses including radiotherapy, fluid shear and oxidative stresses and ultraviolet exposure, and interacted with stress signals such as AMP-activated protein kinase. Finally, a Cav-1 fluctuation model during cancer development is provided and Cav-1 is suggested to be a stress signal and cytoprotective. Loss of Cav-1 may increase susceptibility to oncogenic events. However, research to explore the underlying molecular network between Cav-1 and stress signals is warranted.
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Affiliation(s)
- Zhiyu Wang
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Neng Wang
- Department of Breast Oncology, Sun Yat-sen Univeristy Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Pengxi Liu
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fu Peng
- Pharmacy College, State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Guangzhou, China
| | - Hailin Tang
- Department of Breast Oncology, Sun Yat-sen Univeristy Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Qianjun Chen
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Rui Xu
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yan Dai
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yi Lin
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoming Xie
- Department of Breast Oncology, Sun Yat-sen Univeristy Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Cheng Peng
- Pharmacy College, State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Guangzhou, China
| | - Honglin Situ
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
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Chen Y, Wang C, Huang Q, Wu D, Cao J, Xu X, Yang C, Li X. Caveolin-1 Plays an Important Role in the Differentiation of Bone Marrow-Derived Mesenchymal Stem Cells into Cardiomyocytes. Cardiology 2016; 136:40-48. [PMID: 27554796 DOI: 10.1159/000446869] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 05/15/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Accumulating evidence has demonstrated that bone marrow-derived mesenchymal stem cells (BMSCs) may transdifferentiate into cardiomyocytes, making BMSCs a promising source of cardiomyocytes for transplantation. However, little is known about the molecular mechanisms underlying myogenic conversion of BMSCs. METHODS This study was designed to investigate the functional role of caveolin-1 in the cardiomyocyte differentiation of BMSCs and to explore the potential underlying molecular mechanisms. RESULTS BMSC differentiation was induced by treatment with 10 μM 5-azacytidine, and immunofluorescence assay showed that the expression of cardiomyocyte marker cardiac troponin T (cTnT) was significantly increased compared with a control group. Meanwhile, an increased caveolin-1 expression was found during the 5-azacytidine-induced BMSC differentiation. Additionally, the role of caveolin-1 in the differentiation process was then studied by using caveolin-1 siRNAs. We found that silencing caveolin-1 during induction remarkably enhanced the expression of cardiomyocyte marker genes, including cTnT, Nkx2.5 (cardiac-specific transcription factor), α-cardiac actin and α-myosin heavy chain (α-MHC). Moreover, we observed that downregulation of caveolin-1 was accompanied by inhibition of signal transducer and activator of transcription 3 (STAT3) phosphorylation. CONCLUSIONS Taken together, these findings demonstrate that caveolin-1 plays an important role in the differentiation of BMSCs into cardiomyocytes in conjunction with the STAT3 pathway.
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Affiliation(s)
- Ying Chen
- Department of Cardiology, Wuxi Second People's Hospital of Nanjing Medical University, Wuxi, China
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9
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Anwar SL, Wahyono A, Aryandono T, Haryono SJ. Caveolin-1 in Breast Cancer: Single Molecule Regulation of Multiple Key Signaling Pathways. Asian Pac J Cancer Prev 2016; 16:6803-12. [PMID: 26514450 DOI: 10.7314/apjcp.2015.16.16.6803] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Caveolin-1 is a 22-kD trans-membrane protein enriched in particular plasma membrane invaginations known as caveolae. Cav-1 expression is often dysregulated in human breast cancers, being commonly upregulated in cancer cells and downregulated in stromal cells. As an intracellular scaffolding protein, Cav-1, is involved in several vital biological regulations including endocytosis, transcytosis, vesicular transport, and signaling pathways. Several pathways are modulated by Cav-1 including estrogen receptor, EGFR, Her2/neu, TGFβ, and mTOR and represent as major drivers in mammary carcinogenesis. Expression and role of Cav-1 in breast carcinogenesis is highly variable depending on the stage of tumor development as well as context of the cell. However, recent data have shown that downregulation of Cav-1 expression in stromal breast tumors is associated with frequent relapse, resistance to therapy, and poor outcome. Modification of Cav-1 expression for translational cancer therapy is particularly challenging since numerous signaling pathways might be affected. This review focuses on present understanding of Cav-1 in breast carcinogenesis and its potential role as a new biomarker for predicting therapeutic response and prognosis as well as new target for therapeutic manipulation.
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Affiliation(s)
- Sumadi Lukman Anwar
- Department of Surgery, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia E-mail :
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Totta P, Gionfra F, Busonero C, Acconcia F. Modulation of 17β-Estradiol Signaling on Cellular Proliferation by Caveolin-2. J Cell Physiol 2015; 231:1219-25. [DOI: 10.1002/jcp.25218] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/16/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Pierangela Totta
- Department of Sciences; Section Biomedical Sciences and Technology; University Roma Tre; Viale Guglielmo Marconi; Rome Italy
| | - Fabio Gionfra
- Department of Sciences; Section Biomedical Sciences and Technology; University Roma Tre; Viale Guglielmo Marconi; Rome Italy
| | - Claudia Busonero
- Department of Sciences; Section Biomedical Sciences and Technology; University Roma Tre; Viale Guglielmo Marconi; Rome Italy
| | - Filippo Acconcia
- Department of Sciences; Section Biomedical Sciences and Technology; University Roma Tre; Viale Guglielmo Marconi; Rome Italy
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Li Z, Yang SS, Yin PH, Chang T, Shi LX, Fang L, Fang GE. Activated estrogen receptor-mitogen-activated protein kinases cross talk confer acquired resistance to lapatinib. Thorac Cancer 2015; 6:695-703. [PMID: 26557906 PMCID: PMC4632920 DOI: 10.1111/1759-7714.12239] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 01/01/2015] [Indexed: 01/10/2023] Open
Abstract
Background The efficacy of lapatinib is limited by the development of acquired resistance. The aim of this study was to investigate the role of estrogen receptor (ER) signaling compensatory activation in acquired resistance to lapatinib in breast cancer cells BT474 and the related mechanism. Methods Acquired resistant cell model resistant (r)BT474 was generated with an increasing concentration of lapatinib. Real-time polymerase chain reaction and Western blotting were used to determine the changes of human epidermal growth factor receptor (HER)2 and ER pathways in breast cancer cell BT474 after treatment with lapatinib and the distinction between BT474 and rBT474. Methyl thiazolyl tetrazolium and colony formation assays were employed to detect the proliferation of rBT474 and BT474 cells treated with lapatinib and/or an ER inhibitor, fulvestrant, respectively. Results Lapatinib could inhibit phosphorylation of HER2 and induce expression of forkhead-box protein O3a and progesterone receptor. Acquired resistant cell model rBT474 could grow in the presence of 5 μM lapatinib, with an apoptosis rate of only 5%. Significant inhibition of phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/protein kinase B (AKT) pathway and the activation of the mitogen-activated protein kinases (MAPK) and ER pathways were detected in rBT474, compared with BT474. Furthermore, the expressions of Src phosphorylation and caveolin-1 were also upregulated. The viability of rBT474 was markedly suppressed by the lapatinib/fulvestrant combination in vitro, confirmed by the BT474 xenograft model. Conclusion ER signaling compensatory activation may partly contribute to lapatinib acquired resistance in HER2-overexpressing/ERα-positive breast cancer cells, which might be related to PI3K/AKT inhibition and MAPK pathway activation.
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Affiliation(s)
- Zhe Li
- Department of Thyroid and Breast Surgery, The Tenth People's Hospital of Shanghai, Tongji University Shanghai, China
| | - Sheng-Sheng Yang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Second Military Medical University Shanghai, China
| | - Pei-Hao Yin
- Department of General Surgery, Shanghai Putuo Hospital, Shanghai University of Traditional Chinese Medicine Shanghai, China
| | - Tao Chang
- Department of Thyroid and Breast Surgery, The Tenth People's Hospital of Shanghai, Tongji University Shanghai, China
| | - Lin-Xiang Shi
- Department of Thyroid and Breast Surgery, The Tenth People's Hospital of Shanghai, Tongji University Shanghai, China
| | - Lin Fang
- Department of Thyroid and Breast Surgery, The Tenth People's Hospital of Shanghai, Tongji University Shanghai, China
| | - Guo-En Fang
- Department of General Surgery, Changhai Hospital, Second Military Medical University Shanghai, China
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Milani A, Geuna E, Mittica G, Valabrega G. Overcoming endocrine resistance in metastatic breast cancer: Current evidence and future directions. World J Clin Oncol 2014; 5:990-1001. [PMID: 25493235 PMCID: PMC4259959 DOI: 10.5306/wjco.v5.i5.990] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 05/12/2014] [Accepted: 07/18/2014] [Indexed: 02/06/2023] Open
Abstract
About 75% of all breast cancers are estrogen receptor (ER)-positive. They generally have a more favorable clinical behavior, prognosis, and pattern of recurrence, and endocrine therapy forms the backbone of treatment. Anti-estrogens (such as tamoxifen and fulvestrant) and aromatase inhibitors (such as anastrozole, letrozole, and exemestane) can effectively control the disease and induce tumor responses in a large proportion of patients. However, the majority of patients progress during endocrine therapy (acquired resistance) and a proportion of patients may fail to respond to initial therapy (de novo resistance). Endocrine resistance is therefore of clinical concern and there is great interest in strategies that delay or circumvent it. A deeper knowledge of the molecular mechanisms that drive endocrine resistance has recently led to development of new strategies that have the promise to effectively overcome it. Many resistance mechanisms have been described, and the crosstalk between ER and growth factor receptor signaling pathways seems to represent one of the most relevant. Compounds that are able to inhibit key elements of these pathways and restore endocrine sensitivity have been studied and more are currently under development. The aim of this review is to summarize the molecular pathophysiology of endocrine resistance in breast cancer and its impact on current clinical management.
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Ma W, Wang DD, Li L, Feng YK, Gu HM, Zhu GM, Piao JH, Yang Y, Gao X, Zhang PX. Caveolin-1 plays a key role in the oleanolic acid-induced apoptosis of HL-60 cells. Oncol Rep 2014; 32:293-301. [PMID: 24842472 DOI: 10.3892/or.2014.3177] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 04/14/2014] [Indexed: 11/06/2022] Open
Abstract
Our previous study found that caveolin-1 (CAV-1) protein expression is upregulated during oleanolic acid (OA)-induced inhibition of proliferation and promotion of apoptosis in HL-60 cells. CAV-1 is the main structural protein component of caveolae, playing important roles in tumorigenesis and tumor development. It has been shown that cav-1 expression is lower in leukemia cancer cell lines SUP-B15, HL-60, THP-1 and K562 and in chronic lymphocytic leukemia primary (CLP) cells when compared with normal white blood cells, with the lowest cav-1 expression level found in HL-60 cells. To study the effects of cav-1 in HL-60 cells and the effects of cav-1 overexpression on OA drug efficacy, cav-1 was overexpressed in HL-60 cells using lentiviral-mediated transfection combined with OA treatment. The results showed that cav-1 overexpression inhibited HL-60 cell proliferation, promoted apoptosis, arrested the cell cycle in the G1 phase and inhibited activation of the PI3K/AKT/mTOR signaling pathway. Overexpression of CAV-1 also increased HL-60 cell sensitivity to OA. To further verify whether OA affects HL-60 cells via the activation of downstream signaling pathways by CAV-1, cav-1 gene expression was silenced using RNAi, and the cells were treated with OA to examine its efficacy. The results showed that after cav-1 silencing, OA had little effect on cell activity, apoptosis, the cell cycle and phosphorylation of HL-60 cells. This study is the first to show that CAV-1 plays a crucial role in the effects of OA on HL-60 cells.
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Affiliation(s)
- Wei Ma
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
| | - Di-Di Wang
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
| | - Li Li
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
| | - Yu-Kuan Feng
- Department of Biology, Mudanjiang Medical University, Mudanjiang 157011, P.R. China
| | - Hong-Mei Gu
- Department of Biology, Mudanjiang Medical University, Mudanjiang 157011, P.R. China
| | - Gui-Ming Zhu
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
| | - Jin-Hua Piao
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
| | - Yu Yang
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
| | - Xu Gao
- Department of Biochemistry, Harbin Medical University, Harbin 150086, P.R. China
| | - Peng-Xia Zhang
- School of Basic Medicine, Jiamusi University, Jiamusi 154000, P.R. China
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The less-often-traveled surface of stem cells: caveolin-1 and caveolae in stem cells, tissue repair and regeneration. Stem Cell Res Ther 2013; 4:90. [PMID: 23899671 PMCID: PMC3854699 DOI: 10.1186/scrt276] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Stem cells are an important resource for tissue repair and regeneration. While a great deal of attention has focused on derivation and molecular regulation of stem cells, relatively little research has focused on how the subcellular structure and composition of the cell membrane influences stem cell activities such as proliferation, differentiation and homing. Caveolae are specialized membrane lipid rafts coated with caveolin scaffolding proteins, which can regulate cholesterol transport and the activity of cell signaling receptors and their downstream effectors. Caveolin-1 is involved in the regulation of many cellular processes, including growth, control of mitochondrial antioxidant levels, migration and senescence. These activities are of relevance to stem cell biology, and in this review evidence for caveolin-1 involvement in stem cell biology is summarized. Altered stem and progenitor cell populations in caveolin-1 null mice suggest that caveolin-1 can regulate stem cell proliferation, and in vitro studies with isolated stem cells suggest that caveolin-1 regulates stem cell differentiation. The available evidence leads us to hypothesize that caveolin-1 expression may stabilize the differentiated and undifferentiated stem cell phenotype, and transient downregulation of caveolin-1 expression may be required for transition between the two. Such regulation would probably be critical in regenerative applications of adult stem cells and during tissue regeneration. We also review here the temporal changes in caveolin-1 expression reported during tissue repair. Delayed muscle regeneration in transgenic mice overexpressing caveolin-1 as well as compromised cardiac, brain and liver tissue repair and delayed wound healing in caveolin-1 null mice suggest that caveolin-1 plays an important role in tissue repair, but that this role may be negative or positive depending on the tissue type and the nature of the repair process. Finally, we also discuss how caveolin-1 quiescence-inducing activities and effects on mitochondrial antioxidant levels may influence stem cell aging.
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Baker N, Zhang G, You Y, Tuan RS. Caveolin-1 regulates proliferation and osteogenic differentiation of human mesenchymal stem cells. J Cell Biochem 2013; 113:3773-87. [PMID: 22807396 DOI: 10.1002/jcb.24252] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Caveolin-1 is a scaffolding protein of cholesterol-rich caveolae lipid rafts in the plasma membrane. In addition to regulating cholesterol transport, caveolin-1 has the ability to bind a diverse array of cell signaling molecules and regulate cell signal transduction in caveolae. Currently, there is little known about the role of caveolin-1 in stem cells. It has been reported that the caveolin-1 null mouse has an expanded population of cells expressing stem cell markers in the gut, mammary gland, and brain, suggestive of a role for caveolin-1 in stem cell regulation. The caveolin-1 null mouse also has increased bone mass and an increased bone formation rate, and its bone marrow-derived mesenchymal stem cells (MSCs) have enhanced osteogenic potential. However, the role of caveolin-1 in human MSC osteogenic differentiation remains unexplored. In this study, we have characterized the expression of caveolin-1 in human bone marrow derived MSCs. We show that caveolin-1 protein is enriched in density gradient-fractionated MSC plasma membrane, consisting of ~100 nm diameter membrane-bound vesicles, and is distributed in a punctate pattern by immunofluoresence localization. Expression of caveolin-1 increases in MSCs induced to undergo osteogenic differentiation, and siRNA-mediated knockdown of caveolin-1 expression enhances MSC proliferation and osteogenic differentiation. Taken together, these findings suggest that caveolin-1 normally acts to regulate the differentiation and renewal of MSCs, and increased caveolin-1 expression during MSC osteogenesis likely acts as a negative feedback to stabilize the cell phenotype.
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Affiliation(s)
- Natasha Baker
- Cartilage Biology and Orthopaedics Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, MD 20892, USA
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Effects of estradiol on the endocytic transport of vitamin D carrier protein in hepatocytes. Biochim Biophys Acta Gen Subj 2013; 1830:3421-6. [PMID: 23416408 DOI: 10.1016/j.bbagen.2013.01.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 01/16/2013] [Accepted: 01/21/2013] [Indexed: 01/24/2023]
Abstract
BACKGROUND The possible modulation of receptor-mediated endocytosis (RME) by sex steroids is not well understood, especially in terms of the different receptor-ligand systems and cell types that may exhibit such regulation. The main objective of the current study was to examine the short-term effects of 17β-estradiol (E2) on RME of an extracellular carrier protein for calciferols, vitamin D-binding protein (DBP). METHODS Murine male and female primary hepatocytes were treated for 30min in the absence (controls) or presence of Ε2 (1μM). Labeled DBP was then added, and its endocytosis was measured after an incubation of 10min at 37°C using standard ELISA techniques. To obtain further insight into potential molecular mechanisms, fulvestrant and 17α-ethinyl estradiol (EE) were also analyzed. And as part of comparative analyses, a second nutrient carrier protein, vitamin A-binding protein (RBP), was also analyzed. RESULTS The results provide the first evidence for an estradiol-dependent stimulation of DBP endocytosis (p<0.05 relative to controls without Ε2). This stimulation, however, was only observed in female hepatocytes. Uptake of RBP was enhanced to a similar extent as DBP by estradiol. In normal (non-estradiol treated) male and female hepatocytes such changes in DBP or RBP endocytosis were not observed. Both fulvestrant and EE exhibited a significant (p<0.05), but incomplete, inhibition of Ε2-dependent stimulation of endocytosis. CONCLUSIONS The results provide novel evidence for Ε2 effects on endocytic transport; and for gender-related differences in E2-enhanced transport. These Ε2 effects may be partly dependent on estrogen receptors; but possible, additional or alternative mechanisms are also proposed. GENERAL SIGNIFICANCE Endocytic transport is a fundamental function whose regulation has implications for cell signaling, growth, survival, differentiation, and death. This study helps delineate a possible endocrine regulatory pathway involving modulation of endocytosis by a steroid hormone. It also provides a potential, new relation between different hormonal regulators, e.g., estradiol effects on cellular assimilation of calciferols.
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Yun SP, Ryu JM, Kim MO, Park JH, Han HJ. Rapid actions of plasma membrane estrogen receptors regulate motility of mouse embryonic stem cells through a profilin-1/cofilin-1-directed kinase signaling pathway. Mol Endocrinol 2012; 26:1291-303. [PMID: 22734041 DOI: 10.1210/me.2012-1002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Long-term estrogen actions are vital for driving cell growth, but more recent evidence suggests that estrogen mediates more rapid cellular effects. However, the function of estradiol-17β (E(2))-BSA in mouse embryonic stem cells has not been reported. Therefore, we examined the role of E(2)-BSA in mouse embryonic stem cell motility and its related signal pathways. E(2)-BSA (10(-8) m) significantly increased motility after 24 h incubation and increased filamentous (F)-actin expression; these effects were inhibited by the estrogen receptor antagonist ICI 182,780, indicating that E(2)-BSA bound membrane estrogen receptors and initiated a signal. E(2)-BSA increased c-Src and focal adhesion kinase (FAK) phosphorylation, which was attenuated by ICI 182,780. The E(2)-BSA-induced increase in epidermal growth factor receptor (EGFR) phosphorylation was inhibited by Src inhibitor PP2. As a downstream signal molecule, E(2)-BSA activated cdc42 and increased formation of a complex with the neural Wiskott-Aldrich syndrome protein (N-WASP)/cdc42/transducer of cdc42-dependent actin assembly-1 (TOCA-1), which was inhibited by FAK small interfering RNA (siRNA) and EGFR inhibitor AG 1478. In addition, E(2)-BSA increased profilin-1 expression and cofilin-1 phosphorylation, which was blocked by cdc42 siRNA. Subsequently, E(2)-BSA induced an increase in F-actin expression, and cell motility was inhibited by each signal pathway-related siRNA molecule or inhibitors but not by cofilin-1 siRNA. A combined treatment of cofilin-1 siRNA and E(2)-BSA increased F-actin expression and cell motility more than that of E(2)-BSA alone. These data demonstrate that E(2)-BSA stimulated motility by interacting with profilin-1/cofilin-1 and F-actin through FAK- and c-Src/EGFR transactivation-dependent N-WASP/cdc42/TOCA-1 complex.
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Affiliation(s)
- Seung Pil Yun
- Department of Veterinary Physiology, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
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Abstract
Caveolins (Cavs) are integrated plasma membrane proteins that are complex signaling regulators with numerous partners and whose activity is highly dependent on cellular context. Cavs are both positive and negative regulators of cell signaling in and/or out of caveolae, invaginated lipid raft domains whose formation is caveolin expression dependent. Caveolins and rafts have been implicated in membrane compartmentalization; proteins and lipids accumulate in these membrane microdomains where they transmit fast, amplified and specific signaling cascades. The concept of plasma membrane organization within functional rafts is still in exploration and sometimes questioned. In this chapter, we discuss the opposing functions of caveolin in cell signaling regulation focusing on the role of caveolin both as a promoter and inhibitor of different signaling pathways and on the impact of membrane domain localization on caveolin functionality in cell proliferation, survival, apoptosis and migration.
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Wong CK, So WY, Law SK, Leung FP, Yau KL, Yao X, Huang Y, Li X, Tsang SY. Estrogen controls embryonic stem cell proliferation via store-operated calcium entry and the nuclear factor of activated T-cells (NFAT). J Cell Physiol 2012; 227:2519-30. [PMID: 21898397 DOI: 10.1002/jcp.22990] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Embryonic stem cells (ESCs) can self-renew indefinitely and differentiate into all cell lineages. Calcium is a universal second messenger which regulates a number of cellular pathways. Previous studies showed that store-operated calcium channels (SOCCs) but not voltage-operated calcium channels are present in mouse ESCs (mESCs). In this study, store-operated calcium entry (SOCE) was found to exist in mESCs using confocal microscopy. SOCC blockers lanthanum, 2-aminoethoxydiphenyl borate (2-APB) and SKF-96365 reduced mESC proliferation in a concentration-dependent manner, suggesting that SOCE is important for ESC proliferation. Pluripotent markers, Sox-2, Klf-4, and Nanog, were down-regulated by 2-APB, suggesting that self-renewal property of mESCs relies on SOCE. 17β-estradiol (E2) enhanced mESC proliferation. This enhanced proliferation was associated with an increment of SOCE. Both stimulated proliferation and increased SOCE could be reversed by SOCC blockers suggesting that E2 mediates its stimulatory effect on proliferation via enhancing SOCE. Also, cyclosporin A and INCA-6, inhibitors of calcineurin [phosphatase that de-phosphorylates and activates nuclear factor of activated T-cells (NFAT)], reversed the proliferative effect of E2, indicating that NFAT is involved in E2-stimulated proliferation. Interestingly, E2 caused the nuclear translocation of NFATc4, and this could be reversed by 2-APB. These results suggested that NFATc4 is the downstream target of E2-induced SOCE. The present investigation provides the first line of evidence that SOCE and NFAT are crucial for ESCs to maintain their unique characteristics. In addition, the present investigation also provides novel information on the mechanisms of how E2, an important female sex hormone, affects ESC proliferation.
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Affiliation(s)
- Chun-Kit Wong
- School of Life Sciences, Chinese University of Hong Kong, Hong Kong, China
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Lee SH, Lee YJ, Park SW, Kim HS, Han HJ. Caveolin-1 and integrin β1 regulate embryonic stem cell proliferation via p38 MAPK and FAK in high glucose. J Cell Physiol 2011; 226:1850-9. [PMID: 21506116 DOI: 10.1002/jcp.22510] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The involvement of caveolin-1 (Cav-1) and integrin β1 (IN β1) in regulation of embryonic stem (ES) cell growth by high glucose is by no means clear cut. Therefore, the aim of this study was to examine the influence of high glucose on Cav-1 and IN β1 expression in mouse ES cells and their signaling pathways to modulate proliferation. High glucose significantly increased Cav-1 and IN β1 expression. In addition, increased IN β1 expression was inhibited by Cav-1 small interfering RNA (siRNA). High glucose caused reactive oxygen species generation and p38 mitogen-activated protein kinase (MAPK) phosphorylation. Inhibition of p38 MAPK blocked high glucose-induced Cav-1 and fibronectin (FN) expression. Moreover, phosphorylation of both Src and focal adhesion kinase (FAK) were increased by high glucose, which were inhibited by IN β1 antibody. In addition, high glucose increased the expression levels of PINCH1/2, integrin-linked kinase (ILK), and α-parvin [PIP] complex proteins, which were all inhibited by the FAK siRNA and Src specific inhibitor (PP2, 10(-7) M). High glucose also increased F-actin expression, which was inhibited by ILK, PINCH1/2, and α-parvin siRNAs. Finally, high glucose-induced increase of ES cell proliferation was inhibited by TRIO and F-actin binding protein (TRIOBP) siRNA. The results demonstrate that high glucose-induced Cav-1 and IN β1 activation can stimulate ES cell proliferation through the modification of focal adhesion signaling pathways.
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Affiliation(s)
- Sang Hun Lee
- Department of Veterinary Physiology, Biotherapy Human Resources Center (BK 21), College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
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Tan Z, Zhou LJ, Li Y, Cui YH, Xiang QL, Lin GP, Wang TH. E₂-BSA activates caveolin-1 via PI₃K/ERK1/2 and lysosomal degradation pathway and contributes to EPC proliferation. Int J Cardiol 2011; 158:46-53. [PMID: 21255851 DOI: 10.1016/j.ijcard.2010.12.106] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 11/03/2010] [Accepted: 12/30/2010] [Indexed: 01/18/2023]
Abstract
BACKGROUND The mechanism that estrogen (E(2)) increases the number of endothelial progenitor cells (EPC) is largely unknown. Here we used E(2)-conjugated bovine serum albumin (E(2)-BSA, membrane impermeable) to investigate whether the membrane estrogen receptor (mER) and its related protein caveolin-1 (CAV-1) are involved in these processes. METHODS AND RESULTS E(2)-BSA promoted [(3)H]-thymidine incorporation of EPC through increasing CAV-1 expression via mER (ERα, but not ERβ or GPR30). Both cholesterol depletion and CAV-1 knockdown with use of CAV-1 siRNA significantly attenuated E(2)-BSA-induced [(3)H]-thymidine incorporation. Western blot showed that E(2)-BSA increased membrane CAV-1 protein expression 12h after treatment, whereas mRNA levels of CAV-1 were augmented until 24h after E(2)-BSA treatment. Furthermore, pre-incubated EPC with ICI 182780 (a specific ER antagonist), LY 294002 (a selective PI(3)K inhibitor) or PD 98059 (a specific ERK1/2 inhibitor) before E(2)-BSA inhibited the late-stage effect of E(2)-BSA (≥24 h) on up-regulation of CAV-1 mRNA and protein expression. Pulse chase results demonstrated that E(2)-BSA inhibited lysosome-mediated degradation of CAV-1 protein at the early stage (≤12 h), and then resulted in the increased CAV-1 protein. CONCLUSION In the present work we demonstrated that E(2)-BSA promotes EPC proliferation through mER (ERα) in CAV-1-dependent manner: prolonging the stability of CAV-1 protein through quick inhibition of the lysosomal degradation pathway at the early stage (≤12 h) and up-regulating CAV-1 at transcription levels through PI(3)K/ERK1/2 signaling pathway at the late stage (≥24 h). These data indicated that a there is a novel mechanism of E(2)-BSA in the regulation of EPC proliferation through CAV-1.
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Affiliation(s)
- Zhi Tan
- Department of Physiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, PR China.
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