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Wei L, Wang D, Gupta R, Kim ST, Wang Y. A Proteomics Insight into Advancements in the Rice-Microbe Interaction. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12051079. [PMID: 36903938 PMCID: PMC10005616 DOI: 10.3390/plants12051079] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 05/23/2023]
Abstract
Rice is one of the most-consumed foods worldwide. However, the productivity and quality of rice grains are severely constrained by pathogenic microbes. Over the last few decades, proteomics tools have been applied to investigate the protein level changes during rice-microbe interactions, leading to the identification of several proteins involved in disease resistance. Plants have developed a multi-layered immune system to suppress the invasion and infection of pathogens. Therefore, targeting the proteins and pathways associated with the host's innate immune response is an efficient strategy for developing stress-resistant crops. In this review, we discuss the progress made thus far with respect to rice-microbe interactions from side views of the proteome. Genetic evidence associated with pathogen-resistance-related proteins is also presented, and challenges and future perspectives are highlighted in order to understand the complexity of rice-microbe interactions and to develop disease-resistant crops in the future.
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Affiliation(s)
- Lirong Wei
- Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Dacheng Wang
- Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Ravi Gupta
- College of General Education, Kookmin University, Seoul 02707, Republic of Korea
| | - Sun Tae Kim
- Department of Plant Bioscience, Pusan National University, Miryang 50463, Republic of Korea
| | - Yiming Wang
- Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
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2
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Gao Z, Daquinag AC, Yu Y, Kolonin MG. Endothelial Prohibitin Mediates Bidirectional Long-Chain Fatty Acid Transport in White and Brown Adipose Tissues. Diabetes 2022; 71:1400-1409. [PMID: 35499627 PMCID: PMC9233243 DOI: 10.2337/db21-0972] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 03/27/2022] [Indexed: 11/13/2022]
Abstract
The function of prohibitin-1 (PHB1) in adipocyte mitochondrial respiration, adaptive thermogenesis, and long-chain fatty acid (LCFA) metabolism has been reported. While intracellular PHB1 expression is ubiquitous, cell surface PHB1 localization is selective for adipocytes and endothelial cells of adipose tissue. The importance of PHB1 in adipose endothelium has not been investigated, and its vascular cell surface function has remained unclear. Here, we generated and analyzed mice with PHB1 knock-out specifically in endothelial cells (PHB1 EC-KO). Despite the lack of endothelial PHB1, mice developed normally and had normal vascularization in both white adipose tissue and brown adipose tissue (BAT). Tumor and ex vivo explant angiogenesis assays also have not detected a functional defect in PHB1 KO endothelium. No metabolic phenotype was observed in PHB1 EC-KO mice raised on a regular diet. We show that both male and female PHB1 EC-KO mice have normal body composition and adaptive thermogenesis. However, PHB1 EC-KO mice displayed higher insulin sensitivity and increased glucose clearance when fed a high-fat diet. We demonstrate that the efficacy of LCFA deposition by adipocytes is decreased by PHB1 EC-KO, in particular in BAT. Consistent with that, EC-KO mice have a defect in clearing triglycerides from systemic circulation. Free fatty acid release upon lipolysis induction was also found to be reduced in PHB1 EC-KO mice. Our results demonstrate that PHB1 in endothelial cells regulates bidirectional LCFA transport and thereby suppresses glucose utilization.
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3
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Bassi G, Mishra S. Prohibitin-1 plays a regulatory role in Leydig cell steroidogenesis. iScience 2022; 25:104165. [PMID: 35434552 PMCID: PMC9010647 DOI: 10.1016/j.isci.2022.104165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 12/20/2021] [Accepted: 03/24/2022] [Indexed: 10/31/2022] Open
Abstract
Mitochondria are essential for steroidogenesis. In steroidogenic cells, the initiation of steroidogenesis from cholesterol occurs on the matrix side of the inner mitochondrial membrane by the enzyme P450scc. This requires cholesterol import from the cytoplasm through the outer mitochondrial membrane, facilitated by the StAR protein. The subsequent steps leading to P450scc remain elusive. Here we report that the male transgenic mice that expressed a mutant form of a mitochondrial protein prohibitin-1 (PHB1Tyr114Phe) from the Fabp-4 gene promoter displayed smaller testes, higher testosterone, and lower gonadotropin levels compared with PHB1-expressing and wild-type mice. A subsequent analysis of the testis and Leydig cells from the mice revealed that PHB1 played a previously unknown regulatory role in Leydig cell steroidogenesis. This includes a role in coordinating cell signaling, cholesterol homeostasis, and mitochondrial biology pertaining to steroidogenesis. The implications of our finding are broad as the initial stages of steroidogenesis are indistinguishable across steroidogenic cells. Tyr114Phe-PHB-1 transgenic male mice reveal PHB-1’s role in testosterone production PHB-1 coordinates steroidogenic signaling and events in testosterone biosynthesis Tyr114 residue in PHB-1 plays a regulatory role in testosterone production
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4
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Prohibitin plays a role in the functional plasticity of macrophages. Mol Immunol 2022; 144:152-165. [DOI: 10.1016/j.molimm.2022.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 01/11/2022] [Accepted: 02/15/2022] [Indexed: 11/17/2022]
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5
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Wang X, Yin L, Wen Y, Yuan S. Mitochondrial regulation during male germ cell development. Cell Mol Life Sci 2022; 79:91. [PMID: 35072818 PMCID: PMC11072027 DOI: 10.1007/s00018-022-04134-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/21/2021] [Accepted: 01/05/2022] [Indexed: 12/16/2022]
Abstract
Mitochondria tailor their morphology to execute their specialized functions in different cell types and/or different environments. During spermatogenesis, mitochondria undergo continuous morphological and distributional changes with germ cell development. Deficiencies in these processes lead to mitochondrial dysfunction and abnormal spermatogenesis, thereby causing male infertility. In recent years, mitochondria have attracted considerable attention because of their unique role in the regulation of piRNA biogenesis in male germ cells. In this review, we describe the varied characters of mitochondria and focus on key mitochondrial factors that play pivotal roles in the regulation of spermatogenesis, from primordial germ cells to spermatozoa, especially concerning metabolic shift, stemness and reprogramming, mitochondrial transformation and rearrangement, and mitochondrial defects in human sperm. Further, we discuss the molecular mechanisms underlying these processes.
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Affiliation(s)
- Xiaoli Wang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lisha Yin
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yujiao Wen
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Shuiqiao Yuan
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
- Laboratory Animal Center, Huazhong University of Science and Technology, Wuhan, 430030, China.
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6
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Gao Z, Daquinag AC, Fussell C, Djehal A, Désaubry L, Kolonin MG. Prohibitin Inactivation in Adipocytes Results in Reduced Lipid Metabolism and Adaptive Thermogenesis Impairment. Diabetes 2021; 70:2204-2212. [PMID: 34257070 PMCID: PMC8576510 DOI: 10.2337/db21-0094] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 07/06/2021] [Indexed: 11/13/2022]
Abstract
Prohibitin-1 (PHB) is a multifunctional protein previously reported to be important for adipocyte function. PHB is expressed on the surface of adipose cells, where it interacts with a long-chain fatty acid (LCFA) transporter. Here, we show that mice lacking PHB in adipocytes (PHB adipocyte [Ad]-knockout [KO]) have a defect in fat tissue accumulation despite having larger lipid droplets in adipocytes due to reduced lipolysis. Although PHB Ad-KO mice do not display glucose intolerance, they are insulin resistant. We show that PHB Ad-KO mice are lipid intolerant due to a decreased capacity of adipocytes for LCFA uptake. Instead, PHB Ad-KO mice have increased expression of GLUT1 in various tissues and use glucose as a preferred energy source. We demonstrate that PHB Ad-KO mice have defective brown adipose tissue, are intolerant to cold, and display reduced basal energy expenditure. Systemic repercussions of PHB inactivation in adipocytes were observed in both males and females. Consistent with lower cellular mitochondrial content and reduced uncoupling protein 1 protein expression, brown adipocytes lacking PHB display decreased proton leak and switch from aerobic metabolism to glycolysis. Treatment of differentiating brown adipocytes with small molecules targeting PHB suppressed mitochondrial respiration and uncoupling. Our results demonstrate that PHB in adipocytes is essential for normal fatty acid uptake, oxidative metabolism, and adaptive thermogenesis. We conclude that PHB inhibition could be investigated as an approach to altering energy substrate utilization.
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Affiliation(s)
- Zhanguo Gao
- The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX
| | - Alexes C Daquinag
- The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX
| | - Cale Fussell
- The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX
| | - Amel Djehal
- Regenerative Nanomedicine Laboratory (UMR1260), Faculty of Medicine, Fédération de Médecine Translationnelle, INSERM-University of Strasbourg, Strasbourg, France
- Superior National School Biotechnology Taoufik Khaznadar, Constantine, Algeria
| | - Laurent Désaubry
- Regenerative Nanomedicine Laboratory (UMR1260), Faculty of Medicine, Fédération de Médecine Translationnelle, INSERM-University of Strasbourg, Strasbourg, France
| | - Mikhail G Kolonin
- The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX
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7
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Han S, Jung M, Kim AS, Lee DY, Cha BH, Putnam CW, Lim KS, Bull DA, Won YW. Peptide Adjuvant to Invigorate Cytolytic Activity of NK Cells in an Obese Mouse Cancer Model. Pharmaceutics 2021; 13:pharmaceutics13081279. [PMID: 34452238 PMCID: PMC8401452 DOI: 10.3390/pharmaceutics13081279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 11/24/2022] Open
Abstract
Cancer patients who are overweight compared to those with normal body weight have obesity-associated alterations of natural killer (NK) cells, characterized by poor cytotoxicity, slow proliferation, and inadequate anti-cancer activity. Concomitantly, prohibitin overexpressed by cancer cells elevates glucose metabolism, rendering the tumor microenvironment (TME) more tumor-favorable, and leading to malfunction of immune cells present in the TME. These changes cause vicious cycles of tumor growth. Adoptive immunotherapy has emerged as a promising option for cancer patients; however, obesity-related alterations in the TME allow the tumor to bypass immune surveillance and to down-regulate the activity of adoptively transferred NK cells. We hypothesized that inhibiting the prohibitin signaling pathway in an obese model would reduce glucose metabolism of cancer cells, thereby changing the TME to a pro-immune microenvironment and restoring the cytolytic activity of NK cells. Priming tumor cells with an inhibitory the prohibitin-binding peptide (PBP) enhances cytokine secretion and augments the cytolytic activity of adoptively transferred NK cells. NK cells harvested from the PBP-primed tumors exhibit multiple markers associated with the effector function of active NK cells. Our findings suggest that PBP has the potential as an adjuvant to enhance the cytolytic activity of adoptively transferred NK cells in cancer patients with obesity.
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Affiliation(s)
- Seungmin Han
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Minjin Jung
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Angela S. Kim
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Daniel Y. Lee
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Byung-Hyun Cha
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Charles W. Putnam
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Kwang Suk Lim
- Interdisciplinary Program in Biohealth-Machinery Convergence Engineering, Department of Biotechnology and Bioengineering, College of Art, Culture and Engineering, Kangwon National University, Chuncheon 24341, Korea;
| | - David A. Bull
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
| | - Young-Wook Won
- Division of Cardiothoracic Surgery, Department of Surgery, University of Arizona College of Medicine—Tucson, Tucson, AZ 85724, USA; (S.H.); (M.J.); (A.S.K.); (D.Y.L.); (B.-H.C.); (C.W.P.); (D.A.B.)
- Correspondence:
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8
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The Expanding Role of Mitochondria, Autophagy and Lipophagy in Steroidogenesis. Cells 2021; 10:cells10081851. [PMID: 34440620 PMCID: PMC8391558 DOI: 10.3390/cells10081851] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/14/2021] [Accepted: 07/20/2021] [Indexed: 12/12/2022] Open
Abstract
The fundamental framework of steroidogenesis is similar across steroidogenic cells, especially in initial mitochondrial steps. For instance, the START domain containing protein-mediated cholesterol transport to the mitochondria, and its conversion to pregnenolone by the enzyme P450scc, is conserved across steroidogenic cells. The enzyme P450scc localizes to the inner mitochondrial membrane, which makes the mitochondria essential for steroidogenesis. Despite this commonality, mitochondrial structure, number, and dynamics vary substantially between different steroidogenic cell types, indicating implications beyond pregnenolone biosynthesis. This review aims to focus on the growing roles of mitochondria, autophagy and lipophagy in cholesterol uptake, trafficking and homeostasis in steroidogenic cells and consequently in steroidogenesis. We will focus on these aspects in the context of the physiological need for different steroid hormones and cell-intrinsic inherent features in different steroidogenic cell types beyond mitochondria as a mere site for the beginning of steroidogenesis. The overall goal is to provide an authentic and comprehensive review on the expanding role of steroidogenic cell-intrinsic processes in cholesterol homeostasis and steroidogenesis, and to bring attention to the scientific community working in this field on these promising advancements. Moreover, we will discuss a novel mitochondrial player, prohibitin, and its potential role in steroidogenic mitochondria and cells, and consequently, in steroidogenesis.
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9
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Zhang LF, Tan-Tai WJ, Li XH, Liu MF, Shi HJ, Martin-DeLeon PA, O WS, Chen H. PHB regulates meiotic recombination via JAK2-mediated histone modifications in spermatogenesis. Nucleic Acids Res 2020; 48:4780-4796. [PMID: 32232334 PMCID: PMC7229831 DOI: 10.1093/nar/gkaa203] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 01/03/2023] Open
Abstract
Previously, we have shown that human sperm Prohibitin (PHB) expression is significantly negatively correlated with mitochondrial ROS levels but positively correlated with mitochondrial membrane potential and motility. However, the possible role of PHB in mammalian spermatogenesis has not been investigated. Here we document the presence of PHB in spermatocytes and its functional roles in meiosis by generating the first male germ cell-specific Phb-cKO mouse. Loss of PHB in spermatocytes resulted in complete male infertility, associated with not only meiotic pachytene arrest with accompanying apoptosis, but also apoptosis resulting from mitochondrial morphology and function impairment. Our mechanistic studies show that PHB in spermatocytes regulates the expression of STAG3, a key component of the meiotic cohesin complex, via a non-canonical JAK/STAT pathway, and consequently promotes meiotic DSB repair and homologous recombination. Furthermore, the PHB/JAK2 axis was found as a novel mechanism in the maintenance of stabilization of meiotic STAG3 cohesin complex and the modulation of heterochromatin formation in spermatocytes during meiosis. The observed JAK2-mediated epigenetic changes in histone modifications, reflected in a reduction of histone 3 tyrosine 41 phosphorylation (H3Y41ph) and a retention of H3K9me3 at the Stag3 locus, could be responsible for Stag3 dysregulation in spermatocytes with the loss of PHB.
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Affiliation(s)
- Ling-Fei Zhang
- Department of Anatomy, Histology & Embryology, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Wen-Jing Tan-Tai
- Department of Anatomy, Histology & Embryology, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Xiao-Hui Li
- Department of Anatomy, Histology & Embryology, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Mo-Fang Liu
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China; School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China
| | - Hui-Juan Shi
- Key Lab of Reproduction Regulation of NPFPC-Shanghai Institute of Planned Parenthood Research, Fudan University Reproduction and DevelopmentInstitution, Shanghai 200032, China
| | | | - Wai-Sum O
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong SAR, P. R. China
| | - Hong Chen
- Department of Anatomy, Histology & Embryology, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
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10
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Qu Y, Konrad C, Anderson C, Qian L, Yin T, Manfredi G, Iadecola C, Zhou P. Prohibitin S-Nitrosylation Is Required for the Neuroprotective Effect of Nitric Oxide in Neuronal Cultures. J Neurosci 2020; 40:3142-3151. [PMID: 32152200 PMCID: PMC7159891 DOI: 10.1523/jneurosci.1804-19.2020] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 12/15/2022] Open
Abstract
Prohibitin (PHB) is a critical protein involved in many cellular activities. In brain, PHB resides in mitochondria, where it forms a large protein complex with PHB2 in the inner TFmembrane, which serves as a scaffolding platform for proteins involved in mitochondrial structural and functional integrity. PHB overexpression at moderate levels provides neuroprotection in experimental brain injury models. In addition, PHB expression is involved in ischemic preconditioning, as its expression is enhanced in preconditioning paradigms. However, the mechanisms of PHB functional regulation are still unknown. Observations that nitric oxide (NO) plays a key role in ischemia preconditioning compelled us to postulate that the neuroprotective effect of PHB could be regulated by NO. Here, we test this hypothesis in a neuronal model of ischemia-reperfusion injury and show that NO and PHB are mutually required for neuronal resilience against oxygen and glucose deprivation stress. Further, we demonstrate that NO post-translationally modifies PHB through protein S-nitrosylation and regulates PHB neuroprotective function, in a nitric oxide synthase-dependent manner. These results uncover the mechanisms of a previously unrecognized form of molecular regulation of PHB that underlies its neuroprotective function.SIGNIFICANCE STATEMENT Prohibitin (PHB) is a critical mitochondrial protein that exerts a potent neuroprotective effect when mildly upregulated in mice. However, how the neuroprotective function of PHB is regulated is still unknown. Here, we demonstrate a novel regulatory mechanism for PHB that involves nitric oxide (NO) and shows that PHB and NO interact directly, resulting in protein S-nitrosylation on residue Cys69 of PHB. We further show that nitrosylation of PHB may be essential for its ability to preserve neuronal viability under hypoxic stress. Thus, our study reveals a previously unknown mechanism of functional regulation of PHB that has potential therapeutic implications for neurologic disorders.
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Affiliation(s)
- Youyang Qu
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
- Department of Neurology, 2nd Affiliated Hospital of Harbin Medical University, Harbin 150086, People's Republic of China
| | - Csaba Konrad
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
| | - Corey Anderson
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
| | - Liping Qian
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
| | - Tina Yin
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
| | - Giovanni Manfredi
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
| | - Costantino Iadecola
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
| | - Ping Zhou
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York 10065, and
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Abstract
The last three decades have seen a growing interest in research in the field of immunometabolism, likely because of promising discoveries made in this field. This includes demonstration of the crucial roles of cellular metabolism in the regulation of functional plasticity of various immune cells, their cross talk with major metabolic tissues (and consequently in the regulation of metabolic homeostasis) at the systemic level, and their potential in improving the efficacy of current immunotherapy or developing new therapeutics for a variety of metabolic and immune diseases (Lee YS, Wollam J, Olefsky JM, Cell 172:22-40, 2018). Surprisingly, sex differences, which are integral to metabolic and immune health and disease, have received a short shrift from researchers in this field. The purpose of this chapter in this protocols book in the Immunometabolism: Methods in Molecular Biology series is to bring attention to this understudied, but crucial, feature of immunometabolism within the scientific community. Sex differences in adipose (and by extension, metabolic) and immune functions are pervasive in metabolic and immune health and disease; it is likely that a better insight into them may open new research directions to better capitalize on the promising discoveries made in this field, and thereby contribute to the development of sex-based precision medicine. It is counterintuitive to ignore a fundamental aspect of immunometabolism, and thereby limit our ability to capitalize on its promising features in improving or maintaining health, and for the therapeutic targeting of associated diseases. Here we briefly discuss the potential drivers and touch upon some unanswered questions in sex differences in immunometabolism, especially those that require attention from the scientific community.
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Affiliation(s)
- Suresh Mishra
- Faculty of Health Sciences, Department of Internal Medicine, College of Medicine, University of Manitoba, Winnipeg, Canada. .,Faculty of Health Sciences, Department of Physiology and Pathophysiology, College of Medicine, University of Manitoba, Winnipeg, Canada.
| | - Geetika Bassi
- Faculty of Health Sciences, Department of Physiology and Pathophysiology, College of Medicine, University of Manitoba, Winnipeg, Canada
| | - Yang Xin Zi Xu
- Faculty of Health Sciences, Department of Physiology and Pathophysiology, College of Medicine, University of Manitoba, Winnipeg, Canada
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12
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Bauknight DK, Osinski V, Dasa SSK, Nguyen AT, Marshall MA, Hartman J, Harms M, O’Mahony G, Boucher J, Klibanov AL, McNamara CA, Kelly KA. Importance of thorough tissue and cellular level characterization of targeted drugs in the evaluation of pharmacodynamic effects. PLoS One 2019; 14:e0224917. [PMID: 31725756 PMCID: PMC6855449 DOI: 10.1371/journal.pone.0224917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 10/24/2019] [Indexed: 12/31/2022] Open
Abstract
Targeted nanoparticle delivery is a promising strategy for increasing efficacy and limiting side effects of therapeutics. When designing a targeted liposomal formulation, the in vivo biodistribution of the particles must be characterized to determine the value of the targeting approach. Peroxisome proliferator-activated receptor (PPAR) agonists effectively treat metabolic syndrome by decreasing dyslipidemia and insulin resistance but side effects have limited their use, making them a class of compounds that could benefit from targeted liposomal delivery. The adipose targeting sequence peptide (ATS) could fit this role, as it has been shown to bind to adipose tissue endothelium and induce weight loss when delivered conjugated to a pro-apoptotic peptide. To date, however, a full assessment of ATS in vivo biodistribution has not been reported, leaving important unanswered questions regarding the exact mechanisms whereby ATS targeting enhances therapeutic efficacy. We designed this study to evaluate the biodistribution of ATS-conjugated liposomes loaded with the PPARα/γ dual agonist tesaglitazar in leptin-deficient ob/ob mice. The ATS-liposome biodistribution in adipose tissue and other organs was examined at the cellular and tissue level using microscopy, flow cytometry, and fluorescent molecular tomography. Changes in metabolic parameters and gene expression were measured by target and off-target tissue responses to the treatment. Unexpectedly, ATS targeting did not increase liposomal uptake in adipose relative to other tissues, but did increase uptake in the kidneys. Targeting also did not significantly alter metabolic parameters. Analysis of the liposome cellular distribution in the stromal vascular fraction with flow cytometry revealed high uptake by multiple cell types. Our findings highlight the need for thorough study of in vivo biodistribution when evaluating a targeted therapy.
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Affiliation(s)
- Dustin K. Bauknight
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Cancer Center, University of Virginia, Charlottesville, VA, United States of America
| | - Victoria Osinski
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
- Department of Pathology, University of Virginia, Charlottesville, VA, United States of America
| | - Siva Sai Krishna Dasa
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Cancer Center, University of Virginia, Charlottesville, VA, United States of America
| | - Anh T. Nguyen
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
| | - Melissa A. Marshall
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
| | - Julia Hartman
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
| | - Matthew Harms
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Gavin O’Mahony
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Jeremie Boucher
- Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
- The Lundberg Laboratory for Diabetes Research, University of Gothenburg, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Alexander L. Klibanov
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
- Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, VA, United States of America
| | - Coleen A. McNamara
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States of America
- Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, VA, United States of America
| | - Kimberly A. Kelly
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Cancer Center, University of Virginia, Charlottesville, VA, United States of America
- * E-mail:
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13
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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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14
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Mishra S, Nyomba BLG. Prohibitin: A hypothetical target for sex-based new therapeutics for metabolic and immune diseases. Exp Biol Med (Maywood) 2019; 244:157-170. [PMID: 30717609 PMCID: PMC6405819 DOI: 10.1177/1535370219828362] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
IMPACT STATEMENT Traditional sex-related biases in research are now obsolete, and it is important to identify the sex of humans, animals, and even cells in research protocols, due to the role of sex as a fundamental facet of biology, predisposition to disease, and response to therapy. Genetic sex, epigenetics and hormonal regulations, generate sex-dimorphisms. Recent investigations acknowledge sex differences in metabolic and immune health as well as chronic diseases. Prohibitin, an evolutionarily conserved molecule, has pleotropic functions in mitochondrial housekeeping, plasma membrane signaling, and nuclear genetic transcription. Studies in adipocytes, macrophages, and transgenic mice indicate that prohibitin interacts with sex steroids and plays a role in mediating sex differences in adipose tissues and immune cell types. Prohibitin may, depending on context, modulate predisposition to chronic metabolic diseases and malignancy and, because of these attributes, could be a target for sex-based therapies of metabolic and immune-related diseases as well as cancer.
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Affiliation(s)
- Suresh Mishra
- Department of Internal Medicine, University of Manitoba,
Manitoba R3A1R9, Canada
- Department of Physiology & Pathophysiology, University of
Manitoba, Manitoba R3E0J9, Canada
| | - BL Grégoire Nyomba
- Department of Internal Medicine, University of Manitoba,
Manitoba R3A1R9, Canada
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15
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Sibuyi NRS, Meyer M, Onani MO, Skepu A, Madiehe AM. Vascular targeted nanotherapeutic approach for obesity treatment. Int J Nanomedicine 2018; 13:7915-7929. [PMID: 30538468 PMCID: PMC6260142 DOI: 10.2147/ijn.s173424] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Obesity is a global epidemic that poses a serious health concern due to it being a risk factor for life-threatening chronic diseases, such as type 2 diabetes, cancer, and cardiovascular diseases. Pharmacotherapy remains the mainstay for the management of obesity; however, its usefulness is limited due to poor drug efficacy, non-specificity and toxic side effects. Therefore, novel approaches that could provide insights into obesity and obesity-associated diseases as well as development of novel anti-obesity treatment modalities or improvement on the existing drugs are necessary. While the ideal treatment of obesity should involve early intervention in susceptible individuals, targeted nanotherapy potentially provides a fresh perspective that might be better than the current conventional therapies. Independent studies have shown improved drug efficacy by using prohibitin (PHB)-targeted therapy in obese rodents and non-human primates, thus providing a proof of concept that targeted nanotherapy can be a feasible treatment for obesity. This review presents a brief global survey of obesity, its impact on human health, its current treatment and their limitations, and the role of angiogenesis and PHB in the development of obesity. Finally, the role and potential use of nanotechnology coupled with targeted drug delivery in the treatment of obesity are discussed.
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Affiliation(s)
- Nicole Remaliah Samantha Sibuyi
- Department of Science and Technology/Mintek Nanotechnology Innovation Centre, Biolabels Unit, Department of Biotechnology, University of the Western Cape, Bellville, South Africa,
| | - Mervin Meyer
- Department of Science and Technology/Mintek Nanotechnology Innovation Centre, Biolabels Unit, Department of Biotechnology, University of the Western Cape, Bellville, South Africa,
| | - Martin Opiyo Onani
- Organometallics and Nanomaterials, Department of Chemistry, University of the Western Cape, Bellville, South Africa
| | - Amanda Skepu
- Department of Science and Technology/Mintek Nanotechnology Innovation Centre, Biolabels Unit, Advanced Materials Division, Mintek, Johannesburg, South Africa
| | - Abram Madimabe Madiehe
- Department of Science and Technology/Mintek Nanotechnology Innovation Centre, Biolabels Unit, Department of Biotechnology, University of the Western Cape, Bellville, South Africa,
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16
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Yuan G, Chen X, Liu Z, Wei W, Shu Q, Abou-Hamdan H, Jiang L, Li X, Chen R, Désaubry L, Zhou F, Xie D. Flavagline analog FL3 induces cell cycle arrest in urothelial carcinoma cell of the bladder by inhibiting the Akt/PHB interaction to activate the GADD45α pathway. J Exp Clin Cancer Res 2018; 37:21. [PMID: 29415747 PMCID: PMC5804081 DOI: 10.1186/s13046-018-0695-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/31/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Prohibitin 1 (PHB) is a potential target for the treatment of urothelial carcinoma of the bladder (UCB). FL3 is a newly synthesized agent that inhibits cancer cell proliferation by targeting the PHB protein; however, the effect of FL3 in UCB cells remains unexplored. METHODS FL3 was identified to be a potent inhibitor of UCB cell viability using CCK-8 (cell counting kit-8) assay. Then a series of in vitro and in vivo experiments were conducted to further demonstrate the inhibitory effect of FL3 on UCB cell proliferation and to determine the underlying mechanisms. RESULTS FL3 inhibited UCB cell proliferation and growth both in vitro and in vivo. By targeting the PHB protein, FL3 inhibited the interaction of Akt and PHB as well as Akt-mediated PHB phosphorylation, which consequently decreases the localization of PHB in the mitochondria. In addition, FL3 treatment resulted in cell cycle arrest in the G2/M phase, and this inhibitory effect of FL3 could be mimicked by knockdown of PHB. Through the microarray analysis of mRNA expression after FL3 treatment and knockdown of PHB, we found that the mRNA expression of the growth arrest and DNA damage-inducible alpha (GADD45α) gene were significantly upregulated. When knocked down the expression of GADD45α, the inhibitory effect of FL3 on cell cycle was rescued, suggesting that FL3-induced cell cycle inhibition is GADD45α dependent. CONCLUSION Our data provide that FL3 inhibits the interaction of Akt and PHB, which in turn activates the GADD45α-dependent cell cycle inhibition in the G2/M phase.
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Affiliation(s)
- Gangjun Yuan
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xin Chen
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhuowei Liu
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Wensu Wei
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Qinghai Shu
- School of Material Science and Engineering, Beijing Institute of Technology, Beijing, China
| | - Hussein Abou-Hamdan
- Therapeutic Innovation Laboratory, UMR7200, CNRS/University of Strasbourg, Strasbourg, France
| | - Lijuan Jiang
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Xiangdong Li
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Rixin Chen
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Laurent Désaubry
- Therapeutic Innovation Laboratory, UMR7200, CNRS/University of Strasbourg, Strasbourg, France.
- Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China.
| | - Fangjian Zhou
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Dan Xie
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
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Zi Xu YX, Ande SR, Mishra S. Prohibitin: A new player in immunometabolism and in linking obesity and inflammation with cancer. Cancer Lett 2018; 415:208-216. [DOI: 10.1016/j.canlet.2017.12.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 11/30/2017] [Accepted: 12/01/2017] [Indexed: 12/13/2022]
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Prohibitin: a potential therapeutic target in tyrosine kinase signaling. Signal Transduct Target Ther 2017; 2:17059. [PMID: 29263933 PMCID: PMC5730683 DOI: 10.1038/sigtrans.2017.59] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 08/03/2017] [Accepted: 09/07/2017] [Indexed: 11/10/2022] Open
Abstract
Prohibitin is a pleiotropic protein that has roles in fundamental cellular processes, such as cellular proliferation and mitochondrial housekeeping, and in cell- or tissue-specific functions, such as adipogenesis and immune cell functions. The different functions of prohibitin are mediated by its cell compartment-specific attributes, which include acting as an adaptor molecule in membrane signaling, a scaffolding protein in mitochondria, and a transcriptional co-regulator in the nucleus. However, the precise relationship between its distinct cellular localization and diverse functions remain largely unknown. Accumulating evidence suggests that the phosphorylation of prohibitin plays a role in a number of cell signaling pathways and in intracellular trafficking. Herein, we discuss the known and potential importance of the site-specific phosphorylation of prohibitin in regulating these features. We will discuss this in the context of new evidence from tissue-specific transgenic mouse models of prohibitin, including a mutant prohibitin lacking a crucial tyrosine phosphorylation site. We conclude with the opinion that prohibitin can be used as a potential target for tyrosine kinase signal transduction-targeting therapy, including in insulin, growth factors, and immune signaling pathways.
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21
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Genistein improves inflammatory response and colonic function through NF-κB signal in DSS-induced colonic injury. Oncotarget 2017; 8:61385-61392. [PMID: 28977871 PMCID: PMC5617431 DOI: 10.18632/oncotarget.18219] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/05/2017] [Indexed: 12/21/2022] Open
Abstract
This study aimed to investigate the protective potential of genistein in dextran sulfate sodium (DSS)-induced colonic injury in vitro and in vivo models. The results showed that DSS exposure caused growth suppression, colonic injury, inflammation, and barrier dysfunction in mice. Dietary genistein alleviated DSS-caused colonic injury via reducing colonic weight, rectal bleeding, and diarrhea ratio. Meanwhile, genistein reduced colonic inflammatory response via downregulating cytokines expression and improved colonic permeability and barrier in DSS-challenged mice. In Caco-2 cells, genistein improved cell viability and cellular permeability and inhibited DSS-induced activation of TLR4/NF-κB signal. In conclusion, genistein alleviated DSS-caused colonic injury, inflammation, and gut dysfunction, which might be associated with the TLR4/NF-κB signal.
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22
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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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23
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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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