1
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Aryal YP, Han SY, Rana B, Neupane S, Kim TY, Pokharel E, Ha JH, Jung JK, An CH, Kim JY, Yamamoto H, Lee Y, An SY, Suh JY, Kim JY, Sohn WJ. Prohibitin modulates periodontium differentiation in mice development. Front Cell Dev Biol 2024; 12:1369634. [PMID: 38756696 PMCID: PMC11096493 DOI: 10.3389/fcell.2024.1369634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 03/29/2024] [Indexed: 05/18/2024] Open
Abstract
Introduction: Prohibitin (PHB) is an essential scaffold protein that modulates signaling pathways controlling cell survival, metabolism, inflammation, and bone formation. However, its specific role in periodontium development remains less understood. This study aims to elucidate the expression pattern and function of PHB in periodontium development and its involvement in alveolar bone formation. Methods: Immunolocalization of PHB in the periodontium of postnatal (PN) mice were examined. Phb morpholino was micro-injected into the right-side mandible at PN5, corresponding to the position where the alveolar bone process forms in relation to the lower first molar. The micro-injection with a scramble control (PF-127) and the left-side mandibles were used as control groups. Five days post-micro-injection, immunohistochemical analysis and micro-CT evaluation were conducted to assess bone mass and morphological changes. Additionally, expression patterns of signaling molecules were examined following Phb downregulation using 24-h in vitro cultivation of developing dental mesenchyme at E14.5. Results: The immunostaining of PHB showed its localization in the periodontium at PN5, PN8, and PN10. The in vitro cultivation of dental mesenchyme resulted in alterations in Bmps, Runx2, and Wnt signalings after Phb knock-down. At 5 days post-micro-injection, Phb knocking down showed weak immunolocalizations of runt-related transcription factor (RUNX2) and osteocalcin (OCN). However, knocking down Phb led to histological alterations characterized by decreased bone mass and stronger localizations of Ki67 and PERIOSTIN in the periodontium compared 1 to control groups. The micro-CT evaluation showed decreased bone volume and increased PDL space in the Phb knock-down specimens, suggesting its regulatory role in bone formation. Discussion: The region-specific localization of PHB in the margin where alveolar bone forms suggests its involvement in alveolar bone formation and the differentiation of the periodontal ligament. Overall, our findings suggest that Phb plays a modulatory role in alveolar bone formation by harmoniously regulating bone-forming-related signaling molecules during periodontium development.
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Affiliation(s)
- Yam Prasad Aryal
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
- Department of Biological Sciences and Biotechnology, College of Natural Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Song-Yi Han
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Bandana Rana
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Sanjiv Neupane
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, United Sates
| | - Tae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Elina Pokharel
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jung-Hong Ha
- Department of Conservative Dentistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Kwang Jung
- Department of Oral Medicine, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Chang-Hyeon An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Ji-Youn Kim
- Department of Dental Hygiene, Gachon University, Incheon, Republic of Korea
| | - Hitoshi Yamamoto
- Department of Histology and Developmental Biology, Tokyo Dental College, Toky, Japan
| | - Youngkyun Lee
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Seo-Young An
- Department of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jo-Young Suh
- Department of Periodontology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Young Kim
- Department of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of Korea
| | - Wern-Joo Sohn
- College of K-Biohealth, Daegu Haany University, Gyeongsan, Republic of Korea
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2
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Wilson ER, Nunes GDF, Shen S, Moore S, Gawron J, Maxwell J, Syed U, Hurley E, Lanka M, Qu J, Desaubry L, Wrabetz L, Poitelon Y, Feltri ML. Loss of prohibitin 2 in Schwann cells dysregulates key transcription factors controlling developmental myelination. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.20.585915. [PMID: 38562812 PMCID: PMC10983910 DOI: 10.1101/2024.03.20.585915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Schwann cells are critical for the proper development and function of the peripheral nervous system, where they form a mutually beneficial relationship with axons. Past studies have highlighted that a pair of proteins called the prohibitins play major roles in Schwann cell biology. Prohibitins are ubiquitously expressed and versatile proteins. We have previously shown that while prohibitins play a crucial role in Schwann cell mitochondria for long-term myelin maintenance and axon health, they may also be present at the Schwann cell-axon interface during development. Here, we expand on this work, showing that drug-mediated modulation of prohibitins in vitro disrupts myelination and confirming that Schwann cell-specific ablation of prohibitin 2 (Phb2) in vivo results in early and severe defects in peripheral nerve development. Using a proteomic approach in vitro, we identify a pool of candidate PHB2 interactors that change their interaction with PHB2 depending on the presence of axonal signals. Furthermore, we show in vivo that loss of Phb2 in mouse Schwann cells causes ineffective proliferation and dysregulation of transcription factors EGR2 (KROX20), POU3F1 (OCT6) and POU3F2 (BRN2) that are necessary for proper Schwann cell maturation. Schwann cell-specific deletion of Jun, a transcription factor associated with negative regulation of myelination, confers partial rescue of the development defect seen in mice lacking Schwann cell Phb2. This work develops our understanding of Schwann cell biology, revealing that Phb2 may directly or indirectly modulate the timely expression of transcription factors necessary for proper peripheral nervous system development, and proposing candidates that may play a role in PHB2-mediated integration of axon signals in the Schwann cell.
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Affiliation(s)
- Emma R Wilson
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
- Department of Clinical Neurosciences, Cambridge University, Cambridge, UK
| | - Gustavo Della-Flora Nunes
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
- Department of Cell and Developmental Biology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Shichen Shen
- Department of Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Seth Moore
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Joseph Gawron
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Jessica Maxwell
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Umair Syed
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Edward Hurley
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Meghana Lanka
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Jun Qu
- Department of Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Laurent Desaubry
- Center of Research in Biomedicine of Strasbourg, Regenerative Nanomedicine (UMR 1260), INSERM, University of Strasbourg, 67000 Strasbourg, France
| | - Lawrence Wrabetz
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
- Department of Neurology, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Yannick Poitelon
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - M Laura Feltri
- Department of Biochemistry, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
- Department of Neurology, Institute for Myelin and Glia Exploration, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
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3
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Liu H, Franken A, Bielfeld AP, Fehm T, Niederacher D, Cheng Z, Neubauer H, Stamm N. Progesterone-induced progesterone receptor membrane component 1 rise-to-decline changes are essential for decidualization. Reprod Biol Endocrinol 2024; 22:20. [PMID: 38308254 PMCID: PMC10837943 DOI: 10.1186/s12958-024-01188-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 01/20/2024] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Decidualization of endometrial cells is the prerequisite for embryo implantation and subsequent placenta formation and is induced by rising progesterone levels following ovulation. One of the hormone receptors contributing to endometrial homeostasis is Progesterone Receptor Membrane Component 1 (PGRMC1), a non-classical membrane-bound progesterone receptor with yet unclear function. In this study, we aimed to investigate how PGRMC1 contributes to human decidualization. METHODS We first analyzed PGRMC1 expression profile during a regular menstrual cycle in RNA-sequencing datasets. To further explore the function of PGRMC1 in human decidualization, we implemented an inducible decidualization system, which is achieved by culturing two human endometrial stromal cell lines in decidualization-inducing medium containing medroxyprogesterone acetate and 8-Br-cAMP. In our system, we measured PGRMC1 expression during hormone induction as well as decidualization status upon PGRMC1 knockdown at different time points. We further conferred proximity ligation assay to identify PGRMC1 interaction partners. RESULTS In a regular menstrual cycle, PGRMC1 mRNA expression is gradually decreased from the proliferative phase to the secretory phase. In in vitro experiments, we observed that PGRMC1 expression follows a rise-to-decline pattern, in which its expression level initially increased during the first 6 days after induction (PGRMC1 increasing phase) and decreased in the following days (PGRMC1 decreasing phase). Knockdown of PGRMC1 expression before the induction led to a failed decidualization, while its knockdown after induction did not inhibit decidualization, suggesting that the progestin-induced 'PGRMC1 increasing phase' is essential for normal decidualization. Furthermore, we found that the interactions of prohibitin 1 and prohibitin 2 with PGRMC1 were induced upon progestin treatment. Knocking down each of the prohibitins slowed down the decidualization process compared to the control, suggesting that PGRMC1 cooperates with prohibitins to regulate decidualization. CONCLUSIONS According to our findings, PGRMC1 expression followed a progestin-induced rise-to-decline expression pattern during human endometrial decidualization process; and the correct execution of this expression program was crucial for successful decidualization. Thereby, the results of our in vitro model explained how PGRMC1 dysregulation during decidualization may present a new perspective on infertility-related diseases.
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Affiliation(s)
- Hailun Liu
- Department of Obstetrics and Gynecology, Life Science Center, University Hospital and Medical Faculty of the Heinrich-Heine University Duesseldorf, Duesseldorf, Germany
| | - André Franken
- Department of Obstetrics and Gynecology, Life Science Center, University Hospital and Medical Faculty of the Heinrich-Heine University Duesseldorf, Duesseldorf, Germany
| | - Alexandra P Bielfeld
- Department of OB/GYN & REI, UniKiD, University Hospital and Faculty of Medicine, Heinrich Heine University, Duesseldorf, Germany
| | - Tanja Fehm
- Department of Obstetrics and Gynecology, Life Science Center, University Hospital and Medical Faculty of the Heinrich-Heine University Duesseldorf, Duesseldorf, Germany
| | - Dieter Niederacher
- Department of Obstetrics and Gynecology, Life Science Center, University Hospital and Medical Faculty of the Heinrich-Heine University Duesseldorf, Duesseldorf, Germany
| | - Zhongping Cheng
- Department of Obstetrics and Gynecology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
- Institute of Gynecological Minimally Invasive Medicine, Tongji University School of Medicine, Shanghai, 200072, China
| | - Hans Neubauer
- Department of Obstetrics and Gynecology, Life Science Center, University Hospital and Medical Faculty of the Heinrich-Heine University Duesseldorf, Duesseldorf, Germany.
| | - Nadia Stamm
- Department of Obstetrics and Gynecology, Life Science Center, University Hospital and Medical Faculty of the Heinrich-Heine University Duesseldorf, Duesseldorf, Germany.
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4
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Hong IS. Endometrial Stem Cells: Orchestrating Dynamic Regeneration of Endometrium and Their Implications in Diverse Endometrial Disorders. Int J Biol Sci 2024; 20:864-879. [PMID: 38250149 PMCID: PMC10797688 DOI: 10.7150/ijbs.89795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 12/24/2023] [Indexed: 01/23/2024] Open
Abstract
The human endometrium, a vital component of the uterus, undergoes dynamic changes during the menstrual cycle to create a receptive environment for embryo implantation. Its remarkable regenerative capacity can be attributed to the presence of tissue-resident stem cell populations within the endometrium. Despite variations in characteristics among different subtypes, endometrial stem cells exhibit notably robust self-renewal capacity and the ability to differentiate into multiple lineages. This review offers a comprehensive insight into the current literature and recent advancements regarding the roles of various endometrial stem cell types during dynamic regeneration of the endometrium during the menstrual cycle. In addition, emerging evidence suggests that dysfunction or depletion of endometrial stem cells may play critical roles in the development and progression of various endometrial disorders, such as endometriosis, uterine fibroids, adenomyosis, infertility, and endometrial cancer. Therefore, we also highlight potential roles of endometrial stem cells in the development and progression of these endometrial diseases, including their ability to accumulate genetic mutations and express genes associated with endometrial diseases. Understanding the dynamic properties of the endometrium and the roles of endometrial stem cells in various endometrial disorders will shed light on potential therapeutic strategies for managing these conditions and improving women's fertility outcomes.
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Affiliation(s)
- In-Sun Hong
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, 21999, Republic of Korea
- Department of Molecular Medicine, School of Medicine, Gachon University, Incheon 406-840, Republic of Korea
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5
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Matthews CEP, Fussner LA, Yaeger M, Aloor JJ, Reece SW, Kilburg-Basnyat BJ, Varikuti S, Luo B, Inks M, Sergin S, Schmidt CA, Neufer PD, Pennington ER, Fisher-Wellman KH, Chowdhury SM, Fessler MB, Fenton JI, Anderson EJ, Shaikh SR, Gowdy KM. The prohibitin complex regulates macrophage fatty acid composition, plasma membrane packing, and lipid raft-mediated inflammatory signaling. Prostaglandins Leukot Essent Fatty Acids 2023; 190:102540. [PMID: 36706677 PMCID: PMC9992117 DOI: 10.1016/j.plefa.2023.102540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/28/2022] [Accepted: 01/15/2023] [Indexed: 01/20/2023]
Abstract
Prohibitins (PHB1 and PHB2) are ubiquitously expressed proteins which play critical roles in multiple biological processes, and together form the ring-like PHB complex found in phospholipid-rich cellular compartments including lipid rafts. Recent studies have implicated PHB1 as a mediator of fatty acid transport as well as a membrane scaffold mediating B lymphocyte and mast cell signal transduction. However, the specific role of PHBs in the macrophage have not been characterized, including their role in fatty acid uptake and lipid raft-mediated inflammatory signaling. We hypothesized that the PHB complex regulates macrophage inflammatory signaling through the formation of lipid rafts. To evaluate our hypothesis, RAW 264.7 macrophages were transduced with shRNA against PHB1, PHB2, or scrambled control (Scr), and then stimulated with lipopolysaccharide (LPS) or tumor necrosis factor-alpha (TNF-α), which activate lipid raft-dependent receptor signaling (CD14/TLR4 and TNFR1, respectively). PHB1 knockdown was lethal, whereas PHB2 knockdown (PHB2kd), which also resulted in decreased PHB1 expression, led to attenuated nuclear factor-kappa-B (NF-κB) activation and subsequent cytokine and chemokine production. PHB2kd macrophages also had decreased cell surface TNFR1, CD14, TLR4, and lipid raft marker ganglioside GM1 at baseline and post-stimuli. Post-LPS, PHB2kd macrophages did not increase the concentration of cellular saturated, monounsaturated, and polyunsaturated fatty acids. This was accompanied by decreased lipid raft formation and modified plasma membrane molecular packing, further supporting the PHB complex's importance in lipid raft formation. Taken together, these data suggest a critical role for PHBs in regulating macrophage inflammatory signaling via maintenance of fatty acid composition and lipid raft structure. SUMMARY: Prohibitins are proteins found in phospholipid-rich cellular compartments, including lipid rafts, that play important roles in signaling, transcription, and multiple other cell functions. Macrophages are key cells in the innate immune response and the presence of membrane lipid rafts is integral to signal transduction, but the role of prohibitins in macrophage lipid rafts and associated signaling is unknown. To address this question, prohibitin knockdown macrophages were generated and responses to lipopolysaccharide and tumor necrosis factor-alpha, which act through lipid raft-dependent receptors, were analyzed. Prohibitin knockdown macrophages had significantly decreased cytokine and chemokine production, transcription factor activation, receptor expression, lipid raft assembly and membrane packing, and altered fatty acid remodeling. These data indicate a novel role for prohibitins in macrophage inflammatory signaling through regulation of fatty acid composition and lipid raft formation.
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Affiliation(s)
- Christine E Psaltis Matthews
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Lynn A Fussner
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH, United States
| | - Michael Yaeger
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH, United States
| | - Jim J Aloor
- Diabetes and Obesity Institute, Department of Physiology, East Carolina University, Greenville, NC, United States
| | - Sky W Reece
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Brita J Kilburg-Basnyat
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Sanjay Varikuti
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH, United States
| | - Bin Luo
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Morgan Inks
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH, United States
| | - Selin Sergin
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Cameron A Schmidt
- Diabetes and Obesity Institute, Department of Physiology, East Carolina University, Greenville, NC, United States
| | - P Darrell Neufer
- Diabetes and Obesity Institute, Department of Physiology, East Carolina University, Greenville, NC, United States
| | - Edward Ross Pennington
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina, Chapel Hill, NC, United States
| | - Kelsey H Fisher-Wellman
- Diabetes and Obesity Institute, Department of Physiology, East Carolina University, Greenville, NC, United States
| | - Saiful M Chowdhury
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX, United States
| | - Michael B Fessler
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC, United States
| | - Jenifer I Fenton
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Ethan J Anderson
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, FOE Diabetes Research Center, University of Iowa, Iowa City, IA, United States
| | - Saame Raza Shaikh
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina, Chapel Hill, NC, United States
| | - Kymberly M Gowdy
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH, United States.
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Inner mitochondrial membrane protein Prohibitin 1 mediates Nix-induced, Parkin-independent mitophagy. Sci Rep 2023; 13:18. [PMID: 36593241 PMCID: PMC9807637 DOI: 10.1038/s41598-022-26775-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 12/20/2022] [Indexed: 01/04/2023] Open
Abstract
Autophagy of damaged mitochondria, called mitophagy, is an important organelle quality control process involved in the pathogenesis of inflammation, cancer, aging, and age-associated diseases. Many of these disorders are associated with altered expression of the inner mitochondrial membrane (IMM) protein Prohibitin 1. The mechanisms whereby dysfunction occurring internally at the IMM and matrix activate events at the outer mitochondrial membrane (OMM) to induce mitophagy are not fully elucidated. Using the gastrointestinal epithelium as a model system highly susceptible to autophagy inhibition, we reveal a specific role of Prohibitin-induced mitophagy in maintaining intestinal homeostasis. We demonstrate that Prohibitin 1 induces mitophagy in response to increased mitochondrial reactive oxygen species (ROS) through binding to mitophagy receptor Nix/Bnip3L and independently of Parkin. Prohibitin 1 is required for ROS-induced Nix localization to mitochondria and maintaining homeostasis of epithelial cells highly susceptible to mitochondrial dysfunction.
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7
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Tao Y, Qiao S, Lv C, Yun X, Yue M, Fang Y, Wei Z, Dai Y, Xia Y. Phytoestrogen arctigenin preserves the mucus barrier in inflammatory bowel diseases by inhibiting goblet cell apoptosis via the
ERβ
/
TRIM21
/
PHB1
pathway. Phytother Res 2022; 36:3248-3264. [DOI: 10.1002/ptr.7495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 04/26/2022] [Accepted: 04/30/2022] [Indexed: 01/17/2023]
Affiliation(s)
- Yu Tao
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
- Jiangsu Province Hospital of Chinese Medicine The Affiliated Hospital of Nanjing University of Chinese Medicine Nanjing China
| | - Si‐miao Qiao
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Chang‐jun Lv
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Xin‐ming Yun
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Meng‐fan Yue
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Yu‐lai Fang
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Zhi‐feng Wei
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Yue Dai
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
| | - Yu‐feng Xia
- Department of Pharmacology of Chinese Materia Medica, School of Traditional Chinese Pharmacy China Pharmaceutical University Nanjing China
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8
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Della-Flora Nunes G, Wilson ER, Hurley E, He B, O'Malley BW, Poitelon Y, Wrabetz L, Feltri ML. Activation of mTORC1 and c-Jun by Prohibitin1 loss in Schwann cells may link mitochondrial dysfunction to demyelination. eLife 2021; 10:e66278. [PMID: 34519641 PMCID: PMC8478418 DOI: 10.7554/elife.66278] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 09/13/2021] [Indexed: 12/26/2022] Open
Abstract
Schwann cell (SC) mitochondria are quickly emerging as an important regulator of myelin maintenance in the peripheral nervous system (PNS). However, the mechanisms underlying demyelination in the context of mitochondrial dysfunction in the PNS are incompletely understood. We recently showed that conditional ablation of the mitochondrial protein Prohibitin 1 (PHB1) in SCs causes a severe and fast progressing demyelinating peripheral neuropathy in mice, but the mechanism that causes failure of myelin maintenance remained unknown. Here, we report that mTORC1 and c-Jun are continuously activated in the absence of Phb1, likely as part of the SC response to mitochondrial damage. Moreover, we demonstrate that these pathways are involved in the demyelination process, and that inhibition of mTORC1 using rapamycin partially rescues the demyelinating pathology. Therefore, we propose that mTORC1 and c-Jun may play a critical role as executioners of demyelination in the context of perturbations to SC mitochondria.
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Affiliation(s)
- Gustavo Della-Flora Nunes
- Hunter James Kelly Research Institute, University at BuffaloBuffaloUnited States
- Department of Biochemistry, University at BuffaloBuffaloUnited States
| | - Emma R Wilson
- Hunter James Kelly Research Institute, University at BuffaloBuffaloUnited States
- Department of Biochemistry, University at BuffaloBuffaloUnited States
| | - Edward Hurley
- Hunter James Kelly Research Institute, University at BuffaloBuffaloUnited States
| | - Bin He
- Immunobiology & Transplant Science Center and Department of Surgery, Houston Methodist HospitalHoustonUnited States
| | - Bert W O'Malley
- Department of Medicine and Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Yannick Poitelon
- Department of Neuroscience and Experimental Therapeutics, Albany Medical CollegeAlbanyUnited States
| | - Lawrence Wrabetz
- Hunter James Kelly Research Institute, University at BuffaloBuffaloUnited States
- Department of Biochemistry, University at BuffaloBuffaloUnited States
- Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at BuffaloBuffaloUnited States
| | - M Laura Feltri
- Hunter James Kelly Research Institute, University at BuffaloBuffaloUnited States
- Department of Biochemistry, University at BuffaloBuffaloUnited States
- Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at BuffaloBuffaloUnited States
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9
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Della-Flora Nunes G, Wilson ER, Marziali LN, Hurley E, Silvestri N, He B, O'Malley BW, Beirowski B, Poitelon Y, Wrabetz L, Feltri ML. Prohibitin 1 is essential to preserve mitochondria and myelin integrity in Schwann cells. Nat Commun 2021; 12:3285. [PMID: 34078899 PMCID: PMC8172551 DOI: 10.1038/s41467-021-23552-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 04/20/2021] [Indexed: 12/11/2022] Open
Abstract
In peripheral nerves, Schwann cells form myelin and provide trophic support to axons. We previously showed that the mitochondrial protein prohibitin 2 can localize to the axon-Schwann-cell interface and is required for developmental myelination. Whether the homologous protein prohibitin 1 has a similar role, and whether prohibitins also play important roles in Schwann cell mitochondria is unknown. Here, we show that deletion of prohibitin 1 in Schwann cells minimally perturbs development, but later triggers a severe demyelinating peripheral neuropathy. Moreover, mitochondria are heavily affected by ablation of prohibitin 1 and demyelination occurs preferentially in cells with apparent mitochondrial loss. Furthermore, in response to mitochondrial damage, Schwann cells trigger the integrated stress response, but, contrary to what was previously suggested, this response is not detrimental in this context. These results identify a role for prohibitin 1 in myelin integrity and advance our understanding about the Schwann cell response to mitochondrial damage.
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Affiliation(s)
- Gustavo Della-Flora Nunes
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
- Departments of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Emma R Wilson
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
- Departments of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Leandro N Marziali
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
- Departments of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Edward Hurley
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Nicholas Silvestri
- Departments of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Bin He
- Immunobiology & Transplant Science Center and Department of Surgery, Houston Methodist Hospital, Houston, TX, USA
| | - Bert W O'Malley
- Departments of Medicine and Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Bogdan Beirowski
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
- Departments of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Yannick Poitelon
- Albany Medical College, Dept of Neuroscience and Experimental Therapeutics, Albany, NY, USA
| | - Lawrence Wrabetz
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
- Departments of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
- Departments of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
| | - M Laura Feltri
- Hunter James Kelly Research Institute, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA.
- Departments of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA.
- Departments of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA.
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10
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Cheng WJ, Gu MJ, Ye F, Zhang YD, Zhong QP, Dong HF, Liu R, Jiang H. Prohibitin 1 (PHB1) controls growth and development and regulates proliferation and apoptosis in Schistosoma japonicum. FASEB J 2020; 34:11030-11046. [PMID: 32627884 DOI: 10.1096/fj.201902787rrr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 06/05/2020] [Accepted: 06/10/2020] [Indexed: 01/22/2023]
Abstract
Schistosomiasis is a zoonotic parasitic disease caused by the trematode blood flukes of the genus Schistosoma. The prodigious egg output of females is the main cause of the disease in definitive hosts, while the female worm relies on continuous pairing with the male worm to fuel the growth and maturation of the reproductive organs and egg production. Prohibitin, which contains the functionally interdependent PHB1 and PHB2 subunits in human and some other species, has been proposed to participate in the cell proliferation and apoptosis regulation in mammals. However, little is known about the function of PHB homolog in the growth and reproductive development of schistosomes. Here, we reported the Phb1 gene that was structurally and evolutionarily conserved in Schistosoma japonicum when compared with that of other species from Caenorhabditis elegans to human. Real-time PCR detected that SjPhb1 was highly transcribed in the vitellaria of female worms. SjPhb1 knockdown achieved through the dsRNA-mediated RNAi in vivo resulted in retarded growth, decreased pairing, and fecundity in adult worms, as well as attenuated pathogenicity or virulence of worms to their hosts. Cell proliferation and apoptosis examination found decreased cell proliferation and increased cell apoptosis in SjPhb1 dsRNA-treated worms. Therefore, our study provides the first characterization of S. japonicum PHB1 and reveals its fundamental role in the regulation of growth and development of S. japonicum by specific dsRNA-mediated RNAi in vivo. Our findings prompt for a promising molecular of schistosomes that can be targeted to effectively retard the growth and development of the schistosomes.
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Affiliation(s)
- Wen-Jun Cheng
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Meng-Jie Gu
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Feng Ye
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Yao-Dan Zhang
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Qin-Ping Zhong
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Hui-Fen Dong
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Rong Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Hong Jiang
- School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
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11
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Xu YXZ, Bassi G, Mishra S. Prohibitin: a prime candidate for a pleiotropic effector that mediates sex differences in obesity, insulin resistance, and metabolic dysregulation. Biol Sex Differ 2019; 10:25. [PMID: 31118075 PMCID: PMC6530082 DOI: 10.1186/s13293-019-0239-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 05/09/2019] [Indexed: 11/25/2022] Open
Abstract
Adipocytes and macrophages, the two major constituents of adipose tissue, exhibit sex differences and work in synergy in adipose tissue physiology and pathophysiology, including obesity-linked insulin resistance and metabolic dysregulation. Sex steroid hormones play a major role in sex differences in adipose tissue biology. However, our knowledge of the molecules that mediate these effects in adipose tissue remains limited. Consequently, it remains unclear whether these effector molecules in different adipose and immune cell types are distinct or if there are also pleiotropic effectors. Recently, a protein named prohibitin (PHB) with cell compartment- and tissue-specific functions has been found to play a role in sex differences in adipose and immune functions. Transgenic (Tg) mouse models overexpressing PHB (PHB-Tg) and a phospho-mutant PHB (mPHB-Tg) from the fatty acid binding protein-4 (Fabp-4) gene promoter display sex-neutral obesity; however, obesity-related insulin resistance and metabolic dysregulation are male-specific. Intriguingly, with aging, the male PHB-Tg mice developed hepatic steatosis and subsequently liver tumors whereas the male mPHB-Tg mice developed lymph node tumors and splenomegaly. Unlike the male transgenic mice, the female PHB-Tg and mPHB-Tg mice remain protected from obesity-related metabolic dysregulation and tumor development. In conclusion, the sex-dimorphic metabolic and immune phenotypes of PHB-Tg and mPHB-Tg mice have revealed PHB as a pleiotropic effector of sex differences in adipose and immune functions. In this mini-review, we will discuss the pleiotropic attributes of PHB and potential mechanisms that may have contributed to the sex-dimorphic metabolic phenotypes in PHB-Tg and mPHB-Tg mice, which warrant future research. We propose that PHB is a prime candidate for a pleiotropic mediator of sex differences in adipose and immune functions in both physiology and pathophysiology, including obesity, insulin resistance, and metabolic dysregulation.
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Affiliation(s)
- Yang Xin Zi Xu
- Department of Physiology and Pathophysiology, College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Rm. 843 JBRC/715 McDermot Avenue, Winnipeg, MB, R3E 3P4, Canada
| | - Geetika Bassi
- Department of Physiology and Pathophysiology, College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Rm. 843 JBRC/715 McDermot Avenue, Winnipeg, MB, R3E 3P4, Canada
| | - Suresh Mishra
- Department of Physiology and Pathophysiology, College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Rm. 843 JBRC/715 McDermot Avenue, Winnipeg, MB, R3E 3P4, Canada. .,Department of Internal Medicine, College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada.
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12
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Yang B, Chen R, Liang X, Shi J, Wu X, Zhang Z, Chen X. Estrogen Enhances Endometrial Cancer Cells Proliferation by Upregulation of Prohibitin. J Cancer 2019; 10:1616-1621. [PMID: 31205517 PMCID: PMC6548001 DOI: 10.7150/jca.28218] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 01/13/2019] [Indexed: 12/12/2022] Open
Abstract
Estrogen plays an essential role in type I endometrial cancer cell proliferation. Despite great progresses in the etiology has been obtained in the past, however, the molecular mechanisms remain to be fully clarified. Prohibitin has been demonstrated involvement in multiple cancers' development. If it also contributes to estrogen-driven endometrial cancer proliferation is not clear. IHC assay result display that prohibitin overexpressed in endometrial cancer tissue and associated with the poor prognosis; Western blot assay detect that upregulated prohibitin expression with dose- and time-dependent manners. The cellular growth was monitored with SRB assay which demonstrate that knockdown prohibitin attenuated estrogen-induced proliferation. Ubiquitination assay finds estrogen increased prohibitin level through stabilizing prohibitin protein via inhibition of ubiquitination, while estrogen-induced protein expression was mediated by estrogen receptor. Our findings provide a new insight on the mechanism of estrogen-induced proliferation, implying the possibility of using prohibitin as a potential therapeutic target for the treatment of endometrial cancer.
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Affiliation(s)
- Bin Yang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Baoshan Branch, Shanghai, 201900, China.,Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
| | - Ruiying Chen
- Department of Cervical Diseases, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, 200040, China
| | - Xiaoyan Liang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Baoshan Branch, Shanghai, 201900, China
| | - Jiayan Shi
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Baoshan Branch, Shanghai, 201900, China
| | - Xiaomei Wu
- Reproductive Medicine, Department of Obstetrics and Gynecology,Shanghai First people's Hospital, Shanghai Jiaotong University, Shanghai, 201600,China.,Department of Obstetrics and Gynecology, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, 201600, China
| | - Zhenbo Zhang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Baoshan Branch, Shanghai, 201900, China.,Jiangxi Medical College, Nanchang University, Nanchang, 330000, China.,Reproductive Medicine, Department of Obstetrics and Gynecology,Shanghai First people's Hospital, Shanghai Jiaotong University, Shanghai, 201600,China.,Department of Obstetrics and Gynecology, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, 201600, China
| | - Xiong Chen
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital, Baoshan Branch, Shanghai, 201900, China.,Jiangxi Medical College, Nanchang University, Nanchang, 330000, China
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13
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Xiao L, Feng Q, Zhang Z, Wang F, Lydon JP, Ittmann MM, Xin L, Mitsiades N, He B. The essential role of GATA transcription factors in adult murine prostate. Oncotarget 2018; 7:47891-47903. [PMID: 27374105 PMCID: PMC5216986 DOI: 10.18632/oncotarget.10294] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 05/17/2016] [Indexed: 01/20/2023] Open
Abstract
GATA transcription factors are essential in mammalian cell lineage determination and have a critical role in cancer development. In cultured prostate cancer cells, GATA2 coordinates with androgen receptor (AR) to regulate gene transcription. In the murine prostate, among six GATA members, GATA2 and GATA3 are expressed. Immunofluorescence staining revealed that both GATA factors predominantly localize in the nuclei of luminal epithelial cells. The pioneer factor FoxA1 is exclusively detected in the luminal cells, whereas AR is detected in both luminal and basal cells. Using genetic engineering, we generated prostate-specific GATA2 and GATA3 knockout (KO) mice. Ablation of single GATA gene had marginal effect on prostate morphology and AR target gene expression, likely due to their genetic compensation. Double KO mice exhibited PIN III to IV lesions, but decreased prostate to body weight ratio, altered AR target gene expression, and expansion of p63-positive basal cells. However, deletion of GATA2 and GATA3 did not reduce the mRNA or protein levels of AR or FoxA1, indicating that GATA factors are not required for AR or FoxA1 expression in adult prostate. Surprisingly, GATA2 and GATA3 exhibit minimal expression in the ventral prostatic (VP) lobe. In contrast, FoxA1 and AR expression levels in VP are at least as high as those in anterior prostatic (AP) and dorsal-lateral prostatic (DLP) lobes. Together, our results indicate that GATA2 and GATA3 are essential for adult murine prostate function and in vivo AR signaling, and the lack of the GATA factor expression in the VP suggests a fundamental difference between VP and other prostatic lobes.
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Affiliation(s)
- Lijuan Xiao
- Department of Medicine, Section of Hematology and Oncology, Baylor College of Medicine, Houston, TX, USA
| | - Qin Feng
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Zheng Zhang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Fen Wang
- The Center for Cancer and Stem Cell Biology, Institute of Bioscience and Technology, Texas A&M Health Science Center, Houston, TX, USA
| | - John P Lydon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Michael M Ittmann
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA.,Michael E. DeBakey Veterans Affairs Medical Center, US Department of Veterans Affairs, Houston, TX, USA
| | - Li Xin
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Nicholas Mitsiades
- Department of Medicine, Section of Hematology and Oncology, Baylor College of Medicine, Houston, TX, USA.,Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Bin He
- Department of Medicine, Section of Hematology and Oncology, Baylor College of Medicine, Houston, TX, USA.,Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
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14
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Wang D, Zhao YQ, Han YL, Hou CC, Zhu JQ. Characterization of mitochondrial prohibitin from Boleophthalmus pectinirostris and evaluation of its possible role in spermatogenesis. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:1299-1313. [PMID: 28501977 DOI: 10.1007/s10695-017-0373-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
Prohibitin (PHB) is an evolutionarily conserved mitochondrial membrane protein. It plays a vital role in cell proteolysis, senescence, and apoptosis and is associated with spermatogenesis and sperm quality control in mammals. To study the characteristics of the PHB gene and its potential roles during spermatogenesis in Boleophthalmus pectinirostris, we cloned a 1153-bp full-length cDNA from the testis of B. pectinirostris with an open reading frame of 816 bp, which encodes 272 amino acid residues. Real-time quantitative PCR (qPCR) analysis revealed the presence of phb mRNA in all the tissues examined, with higher expression levels found in the testis, kidney, intestine, and muscle tissues. We examined the localization of phb mRNA during spermatogenesis by in situ hybridization (ISH), showing that phb mRNA was distributed in the periphery of the nucleus in primary and secondary spermatocytes. In spermatid and mature sperm, the phb mRNA gradually moved toward one side, where the flagellum is formed. Immunofluorescence (IF) results showed co-localization of the PHB and mitochondria at different stages during spermatogenesis of B. pectinirostris. The signals obtained for PHB decreased as spermatogenesis proceeded; the strongest detection signal was found in secondary spermatocytes, with lower levels of staining in other stages. Additionally, in the mature germ cells, the PHB signals were weak and aggregate in the midpiece of the flagellum.
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Affiliation(s)
- Di Wang
- Key Laboratory of Applied Marine Biotechnology by the Ministry of Education, School of Marine Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China
| | - Yong-Qiang Zhao
- Key Laboratory of Applied Marine Biotechnology by the Ministry of Education, School of Marine Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China
| | - Ying-Li Han
- Key Laboratory of Applied Marine Biotechnology by the Ministry of Education, School of Marine Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China
| | - Cong-Cong Hou
- Key Laboratory of Applied Marine Biotechnology by the Ministry of Education, School of Marine Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China.
| | - Jun-Quan Zhu
- Key Laboratory of Applied Marine Biotechnology by the Ministry of Education, School of Marine Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China.
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15
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Ryu DY, Rahman MS, Pang MG. Determination of Highly Sensitive Biological Cell Model Systems to Screen BPA-Related Health Hazards Using Pathway Studio. Int J Mol Sci 2017; 18:ijms18091909. [PMID: 28878155 PMCID: PMC5618558 DOI: 10.3390/ijms18091909] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/04/2017] [Accepted: 09/04/2017] [Indexed: 02/01/2023] Open
Abstract
Bisphenol-A (BPA) is a ubiquitous endocrine-disrupting chemical. Recently, many issues have arisen surrounding the disease pathogenesis of BPA. Therefore, several studies have been conducted to investigate the proteomic biomarkers of BPA that are associated with disease processes. However, studies on identifying highly sensitive biological cell model systems in determining BPA health risk are lacking. Here, we determined suitable cell model systems and potential biomarkers for predicting BPA-mediated disease using the bioinformatics tool Pathway Studio. We compiled known BPA-mediated diseases in humans, which were categorized into five major types. Subsequently, we investigated the differentially expressed proteins following BPA exposure in several cell types, and analyzed the efficacy of altered proteins to investigate their associations with BPA-mediated diseases. Our results demonstrated that colon cancer cells (SW480), mammary gland, and Sertoli cells were highly sensitive biological model systems, because of the efficacy of predicting the majority of BPA-mediated diseases. We selected glucose-6-phosphate dehydrogenase (G6PD), cytochrome b-c1 complex subunit 1 (UQCRC1), and voltage-dependent anion-selective channel protein 2 (VDAC2) as highly sensitive biomarkers to predict BPA-mediated diseases. Furthermore, we summarized proteomic studies in spermatozoa following BPA exposure, which have recently been considered as another suitable cell type for predicting BPA-mediated diseases.
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Affiliation(s)
- Do-Yeal Ryu
- Department of Animal Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 456-756, Korea.
| | - Md Saidur Rahman
- Department of Animal Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 456-756, Korea.
| | - Myung-Geol Pang
- Department of Animal Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 456-756, Korea.
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16
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Mishra S, Nyomba BG. Prohibitin - At the crossroads of obesity-linked diabetes and cancer. Exp Biol Med (Maywood) 2017; 242:1170-1177. [PMID: 28399645 DOI: 10.1177/1535370217703976] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The promoter of a gene that is selectively expressed in just a few cell types provides unique opportunities to study: (1) the pleiotropic function of a protein in two different cell types including the cell compartment specific function, and (2) the crosstalk between two cell/tissue types at the systemic level. This is not possible with a ubiquitous or a highly specific gene promoter. The adipocyte protein-2 ( aP2) is one such gene. It is primarily expressed in adipocytes, but also selectively in monocytic macrophages and dendritic cells, among various immune cell types. Thus, the adipocyte protein-2 gene promoter provides an opportunity to simultaneously manipulate adipose and immune functions in a transgenic animal. Prohibitin (PHB) is a pleiotropic protein that has roles in both adipocytes and immune cells. Adipocyte specific functions of prohibitin are mediated through its mitochondrial function, whereas its immune functions are mediated in a phosphorylation-dependent manner. We capitalized on this attribute of prohibitin to explore the crosstalk between adipose and immune functions, and to discern mitochondrial and plasma membrane-associated cell signaling functions of prohibitin, by expressing wild type prohibitin (Mito-Ob) and a phospho-mutant form of prohibitin (m-Mito-Ob) from the protein-2 gene promoter, individually. Both transgenic mice develop obesity in a sex-neutral manner, but develop obesity-related metabolic dysregulation in a male sex-specific manner. Subsequently, the male Mito-Ob mice spontaneously developed type 2 diabetes and liver cancer, whereas the male m-Mito-Ob mice developed lymph node tumors or autoimmune diabetes in a context-dependent manner. This review provides a point of view on the role of prohibitin in mediating sex differences in adipose and immune functions at the systemic level. We discuss the unique attributes of prohibitin and provide a new paradigm in adipose-immune crosstalk mediated through a pleiotropic protein. Impact statement Prohibitin (PHB) is ubiquitously expressed and plays a role in adipocyte-immune cell cross-talk. Both male and female transgenic mice expressing wild-type PHB in adipose tissue and in macrophages are obese, but only males develop diabetes and liver cancer. When the mice express PHB mutated on tyrosine-114 in adipocytes and macrophages, both males and females are still obese, but none develops liver cancer; instead, males develop lymph node tumors. Adipocyte specific functions of PHB are mediated through its mitochondrial function, whereas its immune functions are mediated in a phosphorylation-dependent manner. Thus, PHB appears to be an important molecule linking obesity, diabetes, and cancer. In addition, this link appears to be affected by sex steroids. Therefore, targeting PHB may lead to a better understanding of the pathogenesis of obesity, diabetes and cancer.
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Affiliation(s)
- Suresh Mishra
- 1 Department of Internal Medicine, University of Manitoba, Winnipeg R3E3P4, Canada.,2 Department of Physiology & Pathophysiology, University of Manitoba, Winnipeg R3E3P4, Canada
| | - Bl Grégoire Nyomba
- 1 Department of Internal Medicine, University of Manitoba, Winnipeg R3E3P4, Canada
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17
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López-Lluch G. Mitochondrial activity and dynamics changes regarding metabolism in ageing and obesity. Mech Ageing Dev 2017; 162:108-121. [DOI: 10.1016/j.mad.2016.12.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 10/24/2016] [Accepted: 12/13/2016] [Indexed: 12/14/2022]
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18
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Minimal change nephrotic syndrome and prohibitin-2 gene polymorphism. Clin Exp Nephrol 2016; 21:665-670. [PMID: 27812762 DOI: 10.1007/s10157-016-1325-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 08/14/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND Patients with minimal change nephrotic syndrome (MCNS) often also have allergic diseases. Abnormalities of Th2-derived cytokines and T-cell functions contribute to development of these diseases. On the other hand, imbalances between reactive oxygen species (ROS) and antioxidants have been implicated in MCNS and progression of atopic dermatitis. ROS, produced mainly within mitochondria, subject cells to oxidative stress, while prohibitin 2 protects mitochondria by increasing tolerance to ROS. Additionally, podocin, a member of the slit diaphragm protein complex, contains PHB-like domain that serves as a signaling platform regulating podocyte function through associated transmembrane proteins. PATIENTS AND METHOD Then, we performed exome sequencing analysis in five patients with frequently relapsing their MCNS associated with allergic disease and serum IgE concentrations of 2000 IU/L or higher. RESULTS We detected a heterozygous prohibitin 2 polymorphism, c.873-3_873-2 delCA (rs111523336), in 1 patient. This mutation in exon 9 caused frameshifts in regions connected to splicing sites, where they could disrupt transcription of prohibitin 2. Frequency of this polymorphism in exon 9 is 7.3% among Japanese. Increase in peripheral blood ROS even MCNS remission state suggests the heterozygous prohibitin 2 variant may contribute to give more susceptibility towards the recurrence of MCNS as well as atopic skin disease. This increase may have progression of atopic dermatitis, which sometimes heralded. CONCLUSION The prohibitin-2 polymorphism may reduce ROS tolerance in glomerular epithelium and led to high local exposure to ROS, increasing permeability of the glomerular basement membrane to result in proteinuria. Imbalance between ROS and antioxidants together with failure of signal transduction in the glomerular slit membrane caused by prohibitin 2 abnormality could have contributed to nephrotic syndrome in our patients. Prohibitin 2 analysis is needed in additional MCNS patients with concomitant allergic disease.
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19
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Ande SR, Nguyen KH, Nyomba BLG, Mishra S. Prohibitin in Adipose and Immune Functions. Trends Endocrinol Metab 2016; 27:531-541. [PMID: 27312736 DOI: 10.1016/j.tem.2016.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/11/2016] [Accepted: 05/17/2016] [Indexed: 12/17/2022]
Abstract
Prohibitin (PHB) was discovered in a quest to find genes with antiproliferative functions. However, the attribute of PHB that is responsible for its antiproliferative function remains elusive. Meanwhile, recent studies have established PHB as a pleiotropic protein with roles in metabolism, immunity, and senescence. PHB has cell compartment-specific functions, acting as a scaffolding protein in mitochondria, an adaptor molecule in membrane signaling, and a transcriptional coregulator in the nucleus. However, it remains unclear whether different functions and locations of PHB are interrelated or independent from each other, or if PHB works in a tissue-specific manner. Here, we discuss new findings on the role of PHB in adipose-immune interaction and an unexpected role in sex differences in adipose and immune functions.
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Affiliation(s)
- Sudharsana R Ande
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | - K Hoa Nguyen
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | | | - Suresh Mishra
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada; Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, Canada.
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20
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Nguyen KH, Ande SR, Mishra S. Prohibitin: an unexpected role in sex dimorphic functions. Biol Sex Differ 2016; 7:30. [PMID: 27347368 PMCID: PMC4921003 DOI: 10.1186/s13293-016-0083-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 06/17/2016] [Indexed: 12/20/2022] Open
Abstract
Sex differences are known to exist in adipose and immune functions in the body, and sex steroid hormones are known to be involved in sexually dimorphic biological and pathological processes related to adipose-immune interaction. However, our knowledge of proteins that mediate such differences is poor. Two novel obese mice models, Mito-Ob and m-Mito-Ob, that have been reported recently have revealed an unexpected role of a pleiotropic protein, prohibitin (PHB), in sex differences in adipose and immune functions. This discovery points towards a role of pleiotropic proteins and their potential interplay with sex steroid hormones in mediating sexually dimorphic adipose-immune interaction.
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Affiliation(s)
- K Hoa Nguyen
- Department of Internal Medicine, John Buhler Research Centre, University of Manitoba, Rm 843, 715 McDermot Avenue, Winnipeg, Manitoba R3E 3P4 Canada
| | - Sudharsana R Ande
- Department of Internal Medicine, John Buhler Research Centre, University of Manitoba, Rm 843, 715 McDermot Avenue, Winnipeg, Manitoba R3E 3P4 Canada
| | - Suresh Mishra
- Department of Internal Medicine, John Buhler Research Centre, University of Manitoba, Rm 843, 715 McDermot Avenue, Winnipeg, Manitoba R3E 3P4 Canada.,Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, Canada
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21
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Koushyar S, Jiang WG, Dart DA. Unveiling the potential of prohibitin in cancer. Cancer Lett 2015; 369:316-22. [PMID: 26450374 DOI: 10.1016/j.canlet.2015.09.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 09/16/2015] [Accepted: 09/19/2015] [Indexed: 12/18/2022]
Abstract
Recently, research has shed new light on the role of Prohibitin (PHB) in cancer pathogenesis across an array of cancer types. Important mechanisms for PHB have been unveiled in several cancers, especially with regard to the androgen independent state of prostate cancer (PC) and oestrogen dependent breast cancer. However, PHB is often overlooked due to its complex but subtle roles within the cell. Having gathered both historical and current research exploring PHB's role in different cancer types including prostate and breast, here we aim to pair this information with its molecular properties in the hope of translating this information into a clinical perspective, thus discussing its possible use in future cancer therapy.
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Affiliation(s)
- Sarah Koushyar
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University, School of Medicine, Henry Welcome Building, Heath Park, Cardiff CF14 4XN, UK.
| | - Wen G Jiang
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University, School of Medicine, Henry Welcome Building, Heath Park, Cardiff CF14 4XN, UK
| | - D Alwyn Dart
- Cardiff China Medical Research Collaborative (CCMRC), Cardiff University, School of Medicine, Henry Welcome Building, Heath Park, Cardiff CF14 4XN, UK
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Choi M, Chaudhari HN, Ji YR, Ryoo ZY, Kim SW, Yun JW. Effect of estrogen on expression of prohibitin in white adipose tissue and liver of diet-induced obese rats. Mol Cell Biochem 2015; 407:181-96. [DOI: 10.1007/s11010-015-2468-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 05/29/2015] [Indexed: 12/11/2022]
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Farlora R, Nuñez-Acuña G, Gallardo-Escárate C. Prohibitin-2 gene reveals sex-related differences in the salmon louse Caligus rogercresseyi. Gene 2015; 564:73-80. [DOI: 10.1016/j.gene.2015.03.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 03/18/2015] [Accepted: 03/20/2015] [Indexed: 12/16/2022]
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Nanjappa MK, Medrano TI, Lydon JP, Bigsby RM, Cooke PS. Maximal Dexamethasone Inhibition of Luminal Epithelial Proliferation Involves Progesterone Receptor (PR)- and Non-PR-Mediated Mechanisms in Neonatal Mouse Uterus. Biol Reprod 2015; 92:122. [PMID: 25882702 DOI: 10.1095/biolreprod.114.123463] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 04/02/2015] [Indexed: 11/01/2022] Open
Abstract
Progesterone (P4) and the synthetic glucocorticoid dexamethasone (Dex) inhibit luminal epithelial (LE) proliferation in neonatal mouse uteri. This study determined the roles of progesterone receptor and estrogen receptor 1 (PR and ESR1, respectively) in P4- and Dex-induced inhibition of LE proliferation using PR knockout (PRKO) and Esr1 knockout (Esr1KO) mice. Wild-type (WT), heterozygous, and homozygous PRKO female pups were injected with vehicle, P4 (40 μg/g body weight), or Dex (4 or 40 μg/g body weight) on Postnatal Day 5, then 24 h later immunostained for markers of cell proliferation. In WT and heterozygous mice, P4 sharply reduced LE proliferation, and Dex produced dose-responsive decreases equaling those of P4 at the higher dose. Critically, although both doses of Dex similarly decreased proliferation compared to vehicle-treated PRKOs, treatment of PRKO pups with the high Dex dose (40 μg/g) did not inhibit LE as much as treatments of WT mice with this Dex dose or with P4. Stromal proliferation was stimulated by P4 in WT but not PRKO mice, and Dex did not alter stromal proliferation. Uteri of all genotypes strongly expressed glucocorticoid receptor (GR), demonstrating that impaired Dex effects in PRKOs did not reflect GR deficiency. Furthermore, inhibition of LE proliferation by Dex (40 μg/g body weight) in Esr1KO mice was normal, so this process does not involve ESR1. In summary, inhibitory Dex effects on LE proliferation occur partially through non-PR-mediated mechanisms, presumably GR, as indicated by Dex inhibition of LE proliferation in PRKOs. However, maximal inhibitory Dex effects on uterine LE proliferation are not seen in PRKO mice with even high Dex, indicating that maximal Dex effects in WT mice also involve PR.
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Affiliation(s)
| | - Theresa I Medrano
- Department of Physiological Sciences, University of Florida, Gainesville, Florida
| | - John P Lydon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
| | - Robert M Bigsby
- Department of Obstetrics and Gynecology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Paul S Cooke
- Department of Physiological Sciences, University of Florida, Gainesville, Florida
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Szwarc MM, Kommagani R, Lessey BA, Lydon JP. The p160/steroid receptor coactivator family: potent arbiters of uterine physiology and dysfunction. Biol Reprod 2014; 91:122. [PMID: 25297546 PMCID: PMC4434928 DOI: 10.1095/biolreprod.114.125021] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 09/22/2014] [Accepted: 10/03/2014] [Indexed: 11/01/2022] Open
Abstract
The p160/steroid receptor coactivator (SRC) family comprises three pleiotropic coregulators (SRC-1, SRC-2, and SRC-3; otherwise known as NCOA1, NCOA2, and NCOA3, respectively), which modulate a wide spectrum of physiological responses and clinicopathologies. Such pleiotropy is achieved through their inherent structural complexity, which allows this coregulator class to control both nuclear receptor and non-nuclear receptor signaling. As observed in other physiologic systems, members of the SRC family have recently been shown to play pivotal roles in uterine biology and pathobiology. In the murine uterus, SRC-1 is required to launch a full steroid hormone response, without which endometrial decidualization is markedly attenuated. From "dovetailing" clinical and mouse studies, an isoform of SRC-1 was recently identified which promotes endometriosis by reprogramming endometrial cells to evade apoptosis and to colonize as endometriotic lesions within the peritoneal cavity. The endometrium fails to decidualize without SRC-2, which accounts for the infertility phenotype exhibited by mice devoid of this coregulator. In related studies on human endometrial stromal cells, SRC-2 was shown to act as a molecular "pacemaker" of the glycolytic flux. This finding is significant because acceleration of the glycolytic flux provides the necessary bioenergy and biomolecules for endometrial stromal cells to switch from quiescence to a proliferative phenotype, a critical underpinning in the decidual progression program. Although studies on uterine SRC-3 function are in their early stages, clinical studies provide tantalizing support for the proposal that SRC-3 is causally linked to endometrial hyperplasia as well as with endometrial pathologies in patients diagnosed with polycystic ovary syndrome. This proposal is now driving the development and application of innovative technologies, particularly in the mouse, to further understand the functional role of this elusive uterine coregulator in normal and abnormal physiologic contexts. Because dysregulation of this coregulator triad potentially presents a triple threat for increased risk of subfecundity, infertility, or endometrial disease, a clearer understanding of the individual and combinatorial roles of these coregulators in uterine function is urgently required. This minireview summarizes our current understanding of uterine SRC function, with a particular emphasis on the next critical questions that need to be addressed to ensure significant expansion of our knowledge of this underexplored field of uterine biology.
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Affiliation(s)
- Maria M Szwarc
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
| | - Ramakrishna Kommagani
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
| | - Bruce A Lessey
- Department of Obstetrics and Gynecology, University of South Carolina School of Medicine, Greenville, South Carolina
| | - John P Lydon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
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Szwarc MM, Kommagani R, Jeong JW, Wu SP, Tsai SY, Tsai MJ, O’Malley BW, DeMayo FJ, Lydon JP. Perturbing the cellular levels of steroid receptor coactivator-2 impairs murine endometrial function. PLoS One 2014; 9:e98664. [PMID: 24905738 PMCID: PMC4048228 DOI: 10.1371/journal.pone.0098664] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 05/01/2014] [Indexed: 01/24/2023] Open
Abstract
As pleiotropic coregulators, members of the p160/steroid receptor coactivator (SRC) family control a broad spectrum of transcriptional responses that underpin a diverse array of physiological and pathophysiological processes. Because of their potent coregulator properties, strict controls on SRC expression levels are required to maintain normal tissue functionality. Accordingly, an unwarranted increase in the cellular levels of SRC members has been causally linked to the initiation and/or progression of a number of clinical disorders. Although knockout mouse models have underscored the critical non-redundant roles for each SRC member in vivo, there are surprisingly few mouse models that have been engineered to overexpress SRCs. This deficiency is significant since SRC involvement in many of these disorders is based on unscheduled increases in the levels (rather than the absence) of SRC expression. To address this deficiency, we used recent mouse technology that allows for the targeted expression of human SRC-2 in cells which express the progesterone receptor. Through cre-loxP recombination driven by the endogenous progesterone receptor promoter, a marked elevation in expression levels of human SRC-2 was achieved in endometrial cells that are positive for the progesterone receptor. As a result of this increase in coregulator expression, female mice are severely subfertile due to a dysfunctional uterus, which exhibits a hypersensitivity to estrogen exposure. Our findings strongly support the proposal from clinical observations that increased levels of SRC-2 are causal for a number of endometrial disorders which compromise fertility. Future studies will use this mouse model to decipher the molecular mechanisms that underpin the endometrial defect. We believe such mechanistic insight may provide new molecular descriptors for diagnosis, prognosis, and/or therapy in the clinical management of female infertility.
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Affiliation(s)
- Maria M. Szwarc
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Ramakrishna Kommagani
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Jae-Wook Jeong
- Department of Obstetrics, Gynecology and Reproductive Biology, Michigan State University, College of Human Medicine, Grand Rapids, Michigan, United States of America
| | - San-Pin Wu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Sophia Y. Tsai
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Ming-Jer Tsai
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Bert W. O’Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Francesco J. DeMayo
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - John P. Lydon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
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Prohibitin is required for transcriptional repression by the WT1-BASP1 complex. Oncogene 2013; 33:5100-8. [PMID: 24166496 PMCID: PMC4002674 DOI: 10.1038/onc.2013.447] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 09/11/2013] [Accepted: 09/16/2013] [Indexed: 12/24/2022]
Abstract
The Wilms' tumor-1 protein (WT1) is a transcriptional regulator that can either activate or repress genes controlling cell growth, apoptosis and differentiation. The transcriptional corepressor BASP1 interacts with WT1 and mediates WT1's transcriptional repression activity. BASP1 is contained within large complexes, suggesting that it works in concert with other factors. Here we report that the transcriptional repressor prohibitin is part of the WT1-BASP1 transcriptional repression complex. Prohibitin interacts with BASP1, colocalizes with BASP1 in the nucleus, and is recruited to the promoter region of WT1 target genes to elicit BASP1-dependent transcriptional repression. We demonstrate that prohibitin and BASP1 cooperate to recruit the chromatin remodeling factor BRG1 to WT1-responsive promoters and that this results in the dissociation of CBP from the promoter region of WT1 target genes. As seen with BASP1, prohibitin can associate with phospholipids. We demonstrate that the recruitment of PIP2 and HDAC1 to WT1 target genes is also dependent on the concerted activity of BASP1 and prohibitin. Our findings provide new insights into the function of prohibitin in transcriptional regulation and uncover a BASP1-prohibitin complex that plays an essential role in the PIP2-dependent recruitment of chromatin remodeling activities to the promoter.
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Savulescu D, Feng J, Ping YS, Mai O, Boehm U, He B, O'Malley BW, Melamed P. Gonadotropin-releasing hormone-regulated prohibitin mediates apoptosis of the gonadotrope cells. Mol Endocrinol 2013; 27:1856-70. [PMID: 24085822 DOI: 10.1210/me.2013-1210] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
GnRH regulates circulating levels of the gonadotropins but has also been implicated in establishing the gonadotrope cell population. Consistent with this, GnRH induces proliferation of partially differentiated gonadotropes, while reducing the numbers of fully differentiated cells. We have previously reported that the proapoptotic protein, prohibitin (PHB) is expressed more abundantly in gonadotrope-derived LβT2 cells than in partially differentiated αT3-1 gonadotrope precursor cells, suggesting a possible role for PHB in GnRH-induced apoptosis. We show here that PHB is required for GnRH-induced apoptosis in mature gonadotropes. PHB expression and activity are regulated by GnRH: its transcription is via c-Jun NH2-terminal kinase, whereas its nuclear export follows activation of ERK. Moreover, PHB levels are down-regulated by microRNA27, which is expressed at lower levels in mature gonadotropes, possibly explaining the switch to an apoptotic response with development. PHB is required for mitochondrial import of the proapoptotic BAX, whose expression is also induced by GnRH-activated c-Jun NH2-terminal kinase, as is expression of the BH3-only protein, HRK, and this too plays a role in GnRH-induced apoptosis. Finally, we show that gonadotrope-specific PHB-knockout mice display reproductive abnormalities, including a larger gonadotrope population, increased LH levels, reduced fertility, and altered gonad development. We thus demonstrate a role for PHB in GnRH-induced cell death in mature gonadotropes, which is crucial for the normal development and function of the reproductive axis.
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Affiliation(s)
- Dana Savulescu
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa, 32000 Israel.
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29
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Tenga MJ, Lazar IM. Proteomic snapshot of breast cancer cell cycle: G1/S transition point. Proteomics 2013; 13:48-60. [PMID: 23152136 DOI: 10.1002/pmic.201200188] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 09/22/2012] [Accepted: 10/25/2012] [Indexed: 01/16/2023]
Abstract
The biological processes that unfold during the G1-phase of the cell cycle are dependent on extracellular mitogenic factors that signal the cell to enter a state of quiescence, or commit to a cell-cycle round by passing the restriction point (R-point) and enter the S-phase. Unlike normal cells, cancer cells evolved the ability to evade the R-point and continue through the cell cycle even in the presence of extensive DNA damage or absence of mitogenic signals. The purpose of this study was to perform a quantitative proteomic evaluation of the biological processes that are responsible for driving MCF-7 breast cancer cells into division even when molecular checkpoints such as the G1/S R-point are in place. Nuclear and cytoplasmic fractions of the G1 and S cell-cycle phases were analyzed by LC-MS/MS to result in the confident identification of more than 2700 proteins. Statistical evaluation of the normalized data resulted in the selection of proteins that displayed twofold or more change in spectral counts in each cell state. Pathway mapping, functional annotation clustering, and protein interaction network analysis revealed that the top-scoring clusters that could play a role in overriding the G1/S transition point included DNA damage response, chromatin remodeling, transcription/translation regulation, and signaling proteins.
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Affiliation(s)
- Milagros J Tenga
- Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 246021, USA
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30
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Zhou TB, Qin YH. Signaling pathways of prohibitin and its role in diseases. J Recept Signal Transduct Res 2013; 33:28-36. [PMID: 23327602 DOI: 10.3109/10799893.2012.752006] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Prohibitin (PHB), appearing to be a negative regulator of cell proliferation and to be a tumor suppressor, has been connected to diverse cellular functions including cell cycle control, senescence, apoptosis and the regulation of mitochondrial activities. It is a growth regulatory gene that has pleiotropic functions in the nucleus, mitochondria and cytoplasmic compartments. However, in different tissues/cells, the expression of PHB was different, such as that it was increased in most of the cancers, but its expression was reduced in kidney diseases. Signaling pathways might be very important in the pathogenesis of diseases. This review was performed to provide a relatively complete signaling pathways flowchart for PHB to the investigators who were interested in the roles of PHB in the pathogenesis of diseases. Here, we review the signal transduction pathways of PHB and its role in the pathogenesis of diseases.
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Affiliation(s)
- Tian-Biao Zhou
- Department of Pediatric Nephrology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
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Park S, Yoon S, Zhao Y, Park SE, Liao L, Xu J, Lydon JP, DeMayo FJ, O'Malley BW, Bagchi MK, Katzenellenbogen BS. Uterine development and fertility are dependent on gene dosage of the nuclear receptor coregulator REA. Endocrinology 2012; 153:3982-94. [PMID: 22585830 PMCID: PMC3404350 DOI: 10.1210/en.2012-1044] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although the effectiveness of nuclear hormone-receptor complexes is known to depend on coregulator partner proteins, relatively little is known about the roles of coregulators in uterine development and early stages of pregnancy and implantation. Because conventional genetic deletion of the coregulator, repressor of estrogen receptor activity (REA), was embryonic lethal, we here study REA conditional knockout mice generated by cre-loxP recombination, in which REA function was abrogated only in progesterone receptor-expressing tissues, to define the roles of REA in postembryonic stages and in a tissue-specific manner. We find that REA has gene dose-dependent activity impacting uterine development and fertility. Conditional homozygous mutant (REA(d/d)) mice developed to adulthood and showed normal ovarian function, but females were infertile with severely compromised uterine development and function characterized by cell cycle arrest, apoptosis, and altered adenogenesis (endometrial gland morphogenesis), resulting in failure of implantation and decidualization. By contrast, mice heterozygous for REA (REA(f/d)) had a very different phenotype, with estradiol treatment resulting in hyperstimulated, large uteri showing increased proliferation of luminal epithelial cells, and enhanced fluid imbibition associated with altered regulation of aquaporins. These REA(f/d) female mice showed a subfertility phenotype with reduced numbers and sizes of litters. These findings highlight that uterine development and regulation of estrogen receptor activities show a bimodal dependence on the gene dosage of REA. Optimal uterine development and functional activities require the normal gene dosage of REA, with partial or complete deletion resulting in hyperresponsiveness or underresponsiveness to hormone and subfertility or infertility, respectively.
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Affiliation(s)
- Sunghee Park
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, 524 Burrill Hall, 407 South Goodwin Avenue, Urbana, Illinois 61801-3704, USA
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Zhu B, Gao KS, Wang KJ, Ke CH, Huang HQ. Gonad differential proteins revealed with proteomics in oyster (Saccostrea cucullata) using alga as food contaminated with cadmium. CHEMOSPHERE 2012; 87:397-403. [PMID: 22230729 DOI: 10.1016/j.chemosphere.2011.12.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 12/07/2011] [Accepted: 12/12/2011] [Indexed: 05/31/2023]
Abstract
As mercury and lead, cadmium (Cd) is one of the highly toxic metals in both the ocean and land environments, but its toxicological mechanism in organisms including human is still unclear because of the complex toxicological pathways in vivo. Here, the alga Chlorella vulgaris were cultivated at room temperature under the stress of cadmium (1 mg L(-1)) to obtain a toxic food, and then the contaminated food were directly supplied to oyster (Saccostrea cucullata) in seawater. After feeding with C. vulgaris contaminated with Cd (C. vulgaris-Cd), the differential proteins in the oyster gonad (OG) were effectively separated and identified with proteomic approaches. Eleven protein spots were observed to be significantly changed in the OG feeding with C. vulgaris-Cd, which seven spots of these differential proteins were down-regulated while four spots were up-regulated. These altered spots were further excised in gels and identified by a combined technique of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/TOF MS) and database searching. A portion of these differential proteins were further proofed by real-time PCR and Western blotting. The results indicate that the major functions of these differential proteins were described as follows: binding, protein translocation, catalysis, regulation of energy metabolism, reproductive function and skeleton structure. These differential proteins in part may effectively provide a few novel biomarkers for the evaluation of Cd pollution level via a food pathway for harming halobios, mammal and human health, and for understanding the complex mechanisms of Cd toxicity in vivo.
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Affiliation(s)
- Bo Zhu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen 361005, China
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