1
|
Wang Y, Qin J, Sharma A, Dakal TC, Wang J, Pan T, Bhushan R, Chen P, Setiawan MF, Schmidt-Wolf IGH, Li F. Exploring the promise of regulator of G Protein Signaling 20: insights into potential mechanisms and prospects across solid cancers and hematological malignancies. Cancer Cell Int 2024; 24:305. [PMID: 39227952 PMCID: PMC11373255 DOI: 10.1186/s12935-024-03487-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 08/18/2024] [Indexed: 09/05/2024] Open
Abstract
RGS (Regulator of G protein signaling) proteins have long captured the fascination of researchers due to their intricate involvement across a wide array of signaling pathways within cellular systems. Their diverse and nuanced functions have positioned them as continual subjects of scientific inquiry, especially given the implications of certain family members in various cancer types. Of particular note in this context is RGS20, whose clinical relevance and molecular significance in hepatocellular carcinoma we have recently investigated. These investigations have prompted questions into the prevalence of pathogenic mutations within the RGS20 gene and the intricate network of interacting proteins that could contribute to the complex landscape of cancer biology. In our study, we aim to unravel the mutations within the RGS20 gene and the multifaceted interplay between RGS20 and other proteins within the context of cancer. Expanding on this line of inquiry, our research is dedicated to uncovering the intricate mechanisms of RGS20 in various cancers. In particular, we have redirected our attention to examining the role of RGS20 within hematological malignancies, with a specific focus on multiple myeloma and follicular lymphoma. These hematological cancers hold significant promise for further investigation, as understanding the involvement of RGS20 in their pathogenesis could unveil novel therapeutic strategies and treatment avenues. Furthermore, our exploration has extended to encompass the latest discoveries concerning the potential involvement of RGS20 in diseases affecting the central nervous system, thereby broadening the scope of its implications beyond oncology to encompass neurobiology and related fields.
Collapse
Affiliation(s)
- Yulu Wang
- Jiangxi Provincial Key Laboratory of Hematological Diseases, Department of Hematology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China
| | - Jiading Qin
- Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Amit Sharma
- Department of Integrated Oncology, Center for Integrated Oncology (CIO), University Hospital of Bonn, Bonn, Germany
- Department of Neurosurgery, University Hospital of Bonn, Bonn, Germany
| | - Tikam Chand Dakal
- Department of Biotechnology, Mohanlal Sukhadia University, Udaipur, Rajasthan, India
| | - Jieyu Wang
- Jiangxi Provincial Key Laboratory of Hematological Diseases, Department of Hematology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China
| | - Tiantian Pan
- Jiangxi Provincial Key Laboratory of Hematological Diseases, Department of Hematology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China
| | - Ravi Bhushan
- Department of Zoology, M.S. College, Motihari, Bihar, India
| | - Peng Chen
- Department of Integrated Oncology, Center for Integrated Oncology (CIO), University Hospital of Bonn, Bonn, Germany
| | - Maria F Setiawan
- Department of Integrated Oncology, Center for Integrated Oncology (CIO), University Hospital of Bonn, Bonn, Germany
| | - Ingo G H Schmidt-Wolf
- Department of Integrated Oncology, Center for Integrated Oncology (CIO), University Hospital of Bonn, Bonn, Germany
| | - Fei Li
- Jiangxi Provincial Key Laboratory of Hematological Diseases, Department of Hematology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China.
| |
Collapse
|
2
|
Li YM, Shen CY, Jiang JG. Sedative and hypnotic effects of the saponins from a traditional edible plant Liriope spicata Lour. in PCPA-induced insomnia mice. JOURNAL OF ETHNOPHARMACOLOGY 2024; 327:118049. [PMID: 38484954 DOI: 10.1016/j.jep.2024.118049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 03/21/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Liriope spicata Lour., a species listed in the catalogue of 'Medicinal and Edible Homologous Species', is traditionally used for the treatment of fatigue, restlessness, insomnia and constipation. AIM OF THE STUDY This study is aimed to evaluate the sedative and hypnotic effect of the saponins from a natural plant L. spicata Lour. in vivo. MATERIALS AND METHODS The total saponin (LSTS) and purified saponin (LSPS) were extracted from L. spicata, followed by a thorough analysis of their major components using the HPLC-MS. Subsequently, the therapeutic efficacy of LSTS and LSPS was evaluated by the improvement of anxiety and depression behaviors of the PCPA-induced mice. RESULTS LSTS and LSPS exhibited similar saponin compositions but differ in their composition ratios, with liriopesides-type saponins accounting for a larger proportion in LSTS. Studies demonstrated that both LSTS and LSPS can extend sleep duration and immobility time, while reducing sleep latency in PCPA-induced mice. However, there was no significant difference in weight change among the various mice groups. Elisa results indicated that the LSTS and LSPS could decrease levels of NE, DA, IL-6, and elevate the levels of 5-HT, NO, PGD2 and TNF-α in mice plasma. LSTS enhanced the expression of neurotransmitter receptors, while LSPS exhibited a more pronounced effect in regulating the expression of inflammatory factors. In conclusion, the saponins derived from L. spicata might hold promise as ingredients for developing health foods with sedative and hypnotic effects, potentially related to the modulation of serotonergic and GABAAergic neuron expression, as well as immunomodulatory process.
Collapse
Affiliation(s)
- Yi-Meng Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Chun-Yan Shen
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China; Southern Medical University, School of Traditional Chinese Medicine, Guangzhou, 510515, China
| | - Jian-Guo Jiang
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| |
Collapse
|
3
|
Grassi D, Marraudino M, Garcia-Segura LM, Panzica GC. The hypothalamic paraventricular nucleus as a central hub for the estrogenic modulation of neuroendocrine function and behavior. Front Neuroendocrinol 2022; 65:100974. [PMID: 34995643 DOI: 10.1016/j.yfrne.2021.100974] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 12/18/2021] [Accepted: 12/21/2021] [Indexed: 12/17/2022]
Abstract
Estradiol and hypothalamic paraventricular nucleus (PVN) help coordinate reproduction with body physiology, growth and metabolism. PVN integrates hormonal and neural signals originating in the periphery, generating an output mediated both by its long-distance neuronal projections, and by a variety of neurohormones produced by its magnocellular and parvocellular neurosecretory cells. Here we review the cyto-and chemo-architecture, the connectivity and function of PVN and the sex-specific regulation exerted by estradiol on PVN neurons and on the expression of neurotransmitters, neuromodulators, neuropeptides and neurohormones in PVN. Classical and non-classical estrogen receptors (ERs) are expressed in neuronal afferents to PVN and in specific PVN interneurons, projecting neurons, neurosecretory neurons and glial cells that are involved in the input-output integration and coordination of neurohormonal signals. Indeed, PVN ERs are known to modulate body homeostatic processes such as autonomic functions, stress response, reproduction, and metabolic control. Finally, the functional implications of the estrogenic modulation of the PVN for body homeostasis are discussed.
Collapse
Affiliation(s)
- D Grassi
- Department of Anatomy, Histology and Neuroscience, Universidad Autonoma de Madrid, Madrid, Spain
| | - M Marraudino
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano, Torino, Italy
| | - L M Garcia-Segura
- Instituto Cajal, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - G C Panzica
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano, Torino, Italy; Department of Neuroscience Rita Levi Montalcini, University of Torino, Torino, Italy.
| |
Collapse
|
4
|
Regulation of Serotonin 1A Receptor SUMOylation by SENP2 and PIASxα. Int J Mol Sci 2021; 22:ijms222413176. [PMID: 34947973 PMCID: PMC8706138 DOI: 10.3390/ijms222413176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/21/2021] [Accepted: 12/02/2021] [Indexed: 11/25/2022] Open
Abstract
Serotonin 1A receptors (5-HT1ARs) are implicated in the control of mood, cognition, and memory and in various neuropsychiatric disorders such as depression and anxiety. As such, understanding the regulation of 5-HT1ARs will inform the development of better treatment approaches. We previously demonstrated 5-HT1ARs are SUMOylated by SUMO1 in the rat brain. Agonist stimulation increased SUMOylation and was further enhanced when combined with 17β-estradiol-3-benzoate (EB), which are treatments that cause the transient and prolonged desensitization of 5-HT1AR signaling, respectively. In the current study, we identified the protein inhibitor of activated STAT (PIAS)xα as the enzyme that facilitates SUMOylation, and SENP2 as the protein that catalyzes the deSUMOylation of 5-HT1ARs. We demonstrated that PIASxα significantly increased in the membrane fraction of rats co-treated with EB and an agonist, compared to either the EB-treated or vehicle-treated groups. The acute treatment with an agonist alone shifted the location of SENP2 from the membrane to the cytoplasmic fraction, but it has little effect on PIASxα. Hence, two separate mechanisms regulate SUMOylation and the activity of 5-HT1ARs by an agonist and EB. The effects of EB on 5-HT1AR SUMOylation and signaling may be related to the higher incidence of mood disorders in women during times with large fluctuations in estrogens. Targeting the SUMOylation of 5-HT1ARs could have important clinical relevance for the therapy for several neuropsychiatric disorders in which 5-HT1ARs are implicated.
Collapse
|
5
|
McDougall SA, Rios JW, Apodaca MG, Park GI, Montejano NR, Taylor JA, Moran AE, Robinson JAM, Baum TJ, Teran A, Crawford CA. Effects of dopamine and serotonin synthesis inhibitors on the ketamine-, d-amphetamine-, and cocaine-induced locomotor activity of preweanling and adolescent rats: sex differences. Behav Brain Res 2019; 379:112302. [PMID: 31655095 DOI: 10.1016/j.bbr.2019.112302] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/01/2019] [Accepted: 10/12/2019] [Indexed: 12/29/2022]
Abstract
The pattern of ketamine-induced locomotor activity varies substantially across ontogeny and according to sex. Although ketamine is classified as an NMDA channel blocker, it appears to stimulate the locomotor activity of both male and female rats via a monoaminergic mechanism. To more precisely determine the neural mechanisms underlying ketamine's actions, male and female preweanling and adolescent rats were pretreated with vehicle, the dopamine (DA) synthesis inhibitor ∝-methyl-DL-p-tyrosine (AMPT), or the serotonin (5-HT) synthesis inhibitor 4-chloro-DL-phenylalanine methyl ester hydrochloride (PCPA). After completion of the pretreatment regimen, the locomotor activating effects of saline, ketamine, d-amphetamine, and cocaine were assessed during a 2 h test session. In addition, the ability of AMPT and PCPA to reduce dorsal striatal DA and 5-HT content was measured in male and female preweanling, adolescent, and adult rats. Results showed that AMPT and PCPA reduced, but did not fully attenuate, the ketamine-induced locomotor activity of preweanling rats and female adolescent rats. Ketamine (20 and 40 mg/kg) caused a minimal amount of locomotor activity in male adolescent rats, and this effect was not significantly modified by AMPT or PCPA pretreatment. When compared to ketamine, d-amphetamine and cocaine produced different patterns of locomotor activity across ontogeny; moreover, AMPT and PCPA pretreatment affected psychostimulant- and ketamine-induced locomotion differently. When these results are considered together, it appears that both dopaminergic and serotonergic mechanisms mediate the ketamine-induced locomotor activity of preweanling and female adolescent rats. The dichotomous actions of ketamine relative to the psychostimulants in vehicle-, AMPT-, and PCPA-treated rats, suggests that ketamine modulates DA and 5-HT neurotransmission through an indirect mechanism.
Collapse
Affiliation(s)
- Sanders A McDougall
- Department of Psychology, California State University, San Bernardino, CA, USA.
| | - Jasmine W Rios
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Matthew G Apodaca
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Ginny I Park
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Nazaret R Montejano
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Jordan A Taylor
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Andrea E Moran
- Department of Psychology, California State University, San Bernardino, CA, USA; Department of Psychology, University of Nebraska-Lincoln, Lincoln, NE, USA
| | | | - Timothy J Baum
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Angie Teran
- Department of Psychology, California State University, San Bernardino, CA, USA
| | - Cynthia A Crawford
- Department of Psychology, California State University, San Bernardino, CA, USA
| |
Collapse
|
6
|
Hou X, Adeosun SO, Zhao X, Hill R, Zheng B, Reddy R, Su X, Meyer J, Mosley T, Wang JM. ERβ agonist alters RNA splicing factor expression and has a longer window of antidepressant effectiveness than estradiol after long-term ovariectomy. J Psychiatry Neurosci 2019; 44:19. [PMID: 30565903 PMCID: PMC6306290 DOI: 10.1503/jpn.170199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Estrogen therapy (ET), an effective treatment for perimenopausal depression, often fails to ameliorate symptoms when initiated late after the onset of menopause. Our previous work has suggested that alternative splicing of RNA might mediate these differential effects of ET. METHODS Female Sprague–Dawley rats were treated with estradiol (E2) or vehicle 6 days (early ET) or 180 days (late ET) after ovariectomy (OVX). We investigated the differential expression of RNA splicing factors and tryptophan hydroxylase 2 (TPH2) protein using a customized RT2 Profiler PCR Array, reverse-transcription polymerase chain reaction, immunoprecipitation and behaviour changes in clinically relevant early and late ET. RESULTS Early ET, but not late ET, prolonged swimming time in the forced swim test and reduced anxiety-like behaviours in the elevated plus maze. It reversed OVX-increased (SFRS7 and SFRS16) or OVX-decreased (ZRSR2 and CTNNB1) mRNA levels of splicing factors and ERβ splicing changes in the brains of OVX rats. Early ET, but not late ET, also increased the expression of TPH2 and decreased monoamine oxidase A levels in the dorsal raphe in the brains of OVX rats. In late ET, only diarylpropionitrile (an ERβ-specific agonist) achieved similar results — not E2 (an ERα and ERβ agonist) or propylpyrazoletriol (an ERα-specific agonist). LIMITATIONS Our experimental paradigm mimicked early and late ET in the clinical setting, but the contribution of age and OVX might be difficult to distinguish. CONCLUSION These findings suggest that ERβ alternative splicing and altered responses in the regulatory system for serotonin may mediate the antidepressant efficacy of ET associated with the timing of therapy initiation. It is likely that ERβ-specific ligands would be effective estrogen-based antidepressants late after the onset of menopause.
Collapse
Affiliation(s)
- Xu Hou
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Samuel O. Adeosun
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Xueying Zhao
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Rosanne Hill
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Baoying Zheng
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Reveena Reddy
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Xiao Su
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Jeffrey Meyer
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Thomas Mosley
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| | - Jun Ming Wang
- From the Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, USA (Hou, Wang); the Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA (Adeosun, Zhao, Zheng, Reddy, Wang); the Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, MS, USA (Wang); the Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA (Mosley); the Centre for Addiction and Mental Health and Department of Psychiatry, University of Toronto, Toronto, Ont., Canada (Meyer); the Basic Medical College of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang Province, China (Zhao); and the College of Health & Biomedicine, Victoria University, Melbourne, Australia (Su)
| |
Collapse
|
7
|
Suppression of RGSz1 function optimizes the actions of opioid analgesics by mechanisms that involve the Wnt/β-catenin pathway. Proc Natl Acad Sci U S A 2018; 115:E2085-E2094. [PMID: 29440403 DOI: 10.1073/pnas.1707887115] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Regulator of G protein signaling z1 (RGSz1), a member of the RGS family of proteins, is present in several networks expressing mu opioid receptors (MOPRs). By using genetic mouse models for global or brain region-targeted manipulations of RGSz1 expression, we demonstrated that the suppression of RGSz1 function increases the analgesic efficacy of MOPR agonists in male and female mice and delays the development of morphine tolerance while decreasing the sensitivity to rewarding and locomotor activating effects. Using biochemical assays and next-generation RNA sequencing, we identified a key role of RGSz1 in the periaqueductal gray (PAG) in morphine tolerance. Chronic morphine administration promotes RGSz1 activity in the PAG, which in turn modulates transcription mediated by the Wnt/β-catenin signaling pathway to promote analgesic tolerance to morphine. Conversely, the suppression of RGSz1 function stabilizes Axin2-Gαz complexes near the membrane and promotes β-catenin activation, thereby delaying the development of analgesic tolerance. These data show that the regulation of RGS complexes, particularly those involving RGSz1-Gαz, represents a promising target for optimizing the analgesic actions of opioids without increasing the risk of dependence or addiction.
Collapse
|
8
|
Valdés-Sustaita B, López-Rubalcava C, González-Trujano ME, García-Viguera C, Estrada-Camarena E. Aqueous Extract of Pomegranate Alone or in Combination with Citalopram Produces Antidepressant-Like Effects in an Animal Model of Menopause: Participation of Estrogen Receptors. Int J Mol Sci 2017; 18:E2643. [PMID: 29257042 PMCID: PMC5751246 DOI: 10.3390/ijms18122643] [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: 11/03/2017] [Revised: 11/24/2017] [Accepted: 11/30/2017] [Indexed: 12/14/2022] Open
Abstract
It has been reported that the aqueous extract of pomegranate (AE-PG) has polyphenols with estrogenic-like activities. The present work determines if AE-PG alone or in combination with the selective serotonin reuptake inhibitor, citalopram, has antidepressant-like effects. It was also analyzed the participation of estrogen receptors (ER). AE-PG (0.1, 1.0, 10, or 100 mg/kg) was evaluated in ovariectomized female Wistar rats subjected to the forced swimming test. The effects induced by AE-PG were compared with those of citalopram (2.5, 5.0, 10, and 20.0 mg/kg) and 17β-estradiol (E2; 2.5 5.0, and 10 μg/rat). Likewise, the combination of suboptimal doses of AE-PG (0.1 mg/kg) plus citalopram (2.5 mg/kg) was evaluated. To determine if ER participates in the antidepressant-like action of pomegranate, the estrogen antagonist tamoxifen (15 mg/kg) was administered with AE-PG (1 mg/kg). AE-PG produced antidepressant-like actions with a similar behavioral profile induced by citalopram and E2. Suboptimal doses of citalopram plus AE-PG produced antidepressant-like effects. Tamoxifen was able to block AE-PG's antidepressant-like actions. These results confirm the participation of ER in AE-PG's antidepressant-like effects. Furthermore, the additive effects observed with the combined treatment of AE-PG plus citalopram could be advantageous in the treatment of depressive disorders, such as menopause.
Collapse
Affiliation(s)
- Brenda Valdés-Sustaita
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados (CINVESTAV), Mexico City C.P.14330, Mexico.
| | - Carolina López-Rubalcava
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados (CINVESTAV), Mexico City C.P.14330, Mexico.
| | - María Eva González-Trujano
- Laboratorio de Neurofarmacología de Productos Naturales, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente," Mexico City C.P.14370, Mexico.
| | | | - Erika Estrada-Camarena
- Laboratorio de Neuropsicofarmacología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente," Mexico City C.P.14370, Mexico.
| |
Collapse
|
9
|
Yang L, Lee MMK, Leung MMH, Wong YH. Regulator of G protein signaling 20 enhances cancer cell aggregation, migration, invasion and adhesion. Cell Signal 2016; 28:1663-72. [PMID: 27495875 DOI: 10.1016/j.cellsig.2016.07.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/08/2016] [Accepted: 07/31/2016] [Indexed: 12/12/2022]
Abstract
Several RGS (regulator of G protein signaling) proteins are known to be upregulated in a variety of tumors but their roles in modulating tumorigenesis remain undefined. Since the expression of RGS20 is elevated in metastatic melanoma and breast tumors, we examined the effects of RGS20 overexpression and knockdown on the cell mobility and adhesive properties of different human cancer cell lines, including cervical cancer HeLa, breast adenocarcinoma MDA-MB-231, and non-small cell lung carcinoma H1299 and A549 cells. Expression of RGS20 enhanced cell aggregation, migration, invasion and adhesion as determined by hanging drop aggregation, wound healing, transwell chamber migration and invasion assays. Conversely, shRNA-mediated knockdown of endogenous RGS20 impaired these responses. In addition, RGS20 elevated the expression of vimentin (a mesenchymal cell marker) but down-regulated the expression of E-cadherin, two indicators commonly associated with metastasis. These results suggest that the expression of RGS20 may promote metastasis of tumor cells.
Collapse
Affiliation(s)
- Lei Yang
- Division of Life Science, Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Maggie M K Lee
- Division of Life Science, Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Manton M H Leung
- Division of Life Science, Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yung H Wong
- Division of Life Science, Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
| |
Collapse
|
10
|
Woodard GE, Jardín I, Berna-Erro A, Salido GM, Rosado JA. Regulators of G-protein-signaling proteins: negative modulators of G-protein-coupled receptor signaling. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 317:97-183. [PMID: 26008785 DOI: 10.1016/bs.ircmb.2015.02.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Regulators of G-protein-signaling (RGS) proteins are a category of intracellular proteins that have an inhibitory effect on the intracellular signaling produced by G-protein-coupled receptors (GPCRs). RGS along with RGS-like proteins switch on through direct contact G-alpha subunits providing a variety of intracellular functions through intracellular signaling. RGS proteins have a common RGS domain that binds to G alpha. RGS proteins accelerate GTPase and thus enhance guanosine triphosphate hydrolysis through the alpha subunit of heterotrimeric G proteins. As a result, they inactivate the G protein and quickly turn off GPCR signaling thus terminating the resulting downstream signals. Activity and subcellular localization of RGS proteins can be changed through covalent molecular changes to the enzyme, differential gene splicing, and processing of the protein. Other roles of RGS proteins have shown them to not be solely committed to being inhibitors but behave more as modulators and integrators of signaling. RGS proteins modulate the duration and kinetics of slow calcium oscillations and rapid phototransduction and ion signaling events. In other cases, RGS proteins integrate G proteins with signaling pathways linked to such diverse cellular responses as cell growth and differentiation, cell motility, and intracellular trafficking. Human and animal studies have revealed that RGS proteins play a vital role in physiology and can be ideal targets for diseases such as those related to addiction where receptor signaling seems continuously switched on.
Collapse
Affiliation(s)
- Geoffrey E Woodard
- Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Isaac Jardín
- Department of Physiology, University of Extremadura, Caceres, Spain
| | - A Berna-Erro
- Department of Physiology, University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Department of Physiology, University of Extremadura, Caceres, Spain
| | - Juan A Rosado
- Department of Physiology, University of Extremadura, Caceres, Spain
| |
Collapse
|
11
|
McAllister CE, Mi Z, Mure M, Li Q, Muma NA. GPER1 stimulation alters posttranslational modification of RGSz1 and induces desensitization of 5-HT1A receptor signaling in the rat hypothalamus. Neuroendocrinology 2014; 100:228-39. [PMID: 25402859 PMCID: PMC4305009 DOI: 10.1159/000369467] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 10/18/2014] [Indexed: 12/28/2022]
Abstract
Hyperactivity of the hypothalamic-pituitary-adrenal axis is a consistent biological characteristic of depression, and response normalization coincides with clinical responsiveness to antidepressant medications. Desensitization of serotonin 1A receptor (5-HT1AR) signaling in the hypothalamic paraventricular nucleus of the hypothalamus (PVN) follows selective serotonin reuptake inhibitor (SSRI) antidepressant treatment and contributes to the antidepressant response. Estradiol alone produces a partial desensitization of 5-HT1AR signaling and synergizes with SSRIs to result in a complete and more rapid desensitization than with SSRIs alone as measured by a decrease in the oxytocin and adrenocorticotrophic hormone (ACTH) responses to 5-HT1AR stimulation. G protein-coupled estrogen receptor 1 (GPER1) is necessary for estradiol-induced desensitization of 5-HT1AR signaling, although the underlying mechanisms are still unclear. We now find that stimulation of GPER1 with the selective agonist G-1 and nonselective stimulation of estrogen receptors dramatically alter isoform expression of a key component of the 5-HT1AR signaling pathway, RGSz1, a GTPase-activating protein selective for Gαz, the Gα subunit necessary for 5-HT1AR-mediated hormone release. RGSz1 isoforms are differentially glycosylated, SUMOylated, and phosphorylated, and differentially distributed in subcellular organelles. High-molecular-weight RGSz1 is SUMOylated and glycosylated, localized to the detergent-resistant microdomain (DRM) of the cell membrane, and increased by estradiol and G-1 treatment. Because activated Gαz also localizes to the DRM, increased DRM-localized RGSz1 by estradiol and G-1 could reduce Gαz activity, functionally uncoupling 5-HT1AR signaling. Peripheral G-1 treatment produced a partial reduction in oxytocin and ACTH responses to 5-HT1AR stimulation similar to direct injections into the PVN. Together, these results identify GPER1 and RGSz1 as novel targets for the treatment of depression.
Collapse
Affiliation(s)
| | - Zhen Mi
- Department of Pharmacology and Toxicology, University of Kansas
| | - Minae Mure
- Department of Chemistry, University of Kansas
| | - Qian Li
- Division of Gastroenterology and Hepatology, Johns Hopkins University School of Medicine
| | - Nancy A Muma
- Department of Pharmacology and Toxicology, University of Kansas
- Corresponding Author: Nancy A. Muma, Malott Hall Rm 5064, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7572, , Telephone: +1 785 864 4002, Fax: +1 785 864 5219
| |
Collapse
|
12
|
Li Q, Muma NA. Estradiol potentiates 8-OH-DPAT-induced sumoylation of 5-HT₁A receptor: characterization and subcellular distribution of sumoylated 5-HT₁A receptors. Psychoneuroendocrinology 2013; 38:2542-53. [PMID: 23786880 PMCID: PMC3797200 DOI: 10.1016/j.psyneuen.2013.05.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/24/2013] [Accepted: 05/24/2013] [Indexed: 10/26/2022]
Abstract
Sumoylation is a recently described post-translational modification and only a few sumoylated neurotransmitter receptors are known. Through the present studies, we discovered that serotonin1A receptors (5-HT1A-Rs) can be sumoylated by SUMO1 (small-ubiquitin-related modifier 1) protein. The SUMO1-5-HT1A-R is ∼55kDa, is located in the membrane fraction, but not the cytosol, and is distributed in all of the brain regions expressing 5-HT1A-Rs examined. Acute stimulation of 5-HT1A-Rs significantly increased SUMO1-5-HT1A-R in rat hypothalamus. Pre-treatment with estradiol for 2 days, which causes a partial desensitization of 5-HT1A-R signaling, potentiated agonist-induced increases in SUMO1-5-HT1A-Rs in the hypothalamus of ovariectomized rats. Using discontinuous gradient centrifugation followed by digitonin treatment, we found that the majority of SUMO1-5-HT1A-Rs is co-localized with endoplasmic-reticulum and trans-Golgi-network markers. Although a small proportion of SUMO1-5-HT1A-Rs are located in the detergent resistant microdomain (DRM) that contain active G-protein coupled receptors, their distribution was different from that of the Gαz protein that couples to the receptors. These data suggest that the SUMO1-5-HT1A-Rs are an inactive form of 5-HT1A-Rs, a finding further supported by results showing minimal 5-HT1A-R agonist binding to SUMO1-5-HT1A-Rs. Furthermore, SUMO1-5-HT1A-Rs in the DRM were increased by treatment with a 5-HT1A-R agonist, 8-OH-DPAT ((+)8-hydroxy-2-dipropylaminotetralin). Together, these data suggest that sumoylation of 5-HT1A-Rs may be related to 5-HT1A-R trafficking and internalization, which may contribute to 5-HT1A-R desensitization. Since 5-HT1A-Rs play an important role in mood regulation, the present results significantly impact on the understanding of the pathogenesis of affective disorders and development of better therapeutic approaches for these diseases.
Collapse
Affiliation(s)
| | - Nancy A. Muma
- Corresponding author: Nancy A. Muma, Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, 1251 Wescoe Hall Drive, 5064 Malott Hall, Lawrence, Kansas 66045, , Phone: 785-864-4002, Fax: 785-864-5219
| |
Collapse
|
13
|
Li Q, Sullivan NR, McAllister CE, Van de Kar LD, Muma NA. Estradiol accelerates the effects of fluoxetine on serotonin 1A receptor signaling. Psychoneuroendocrinology 2013; 38:1145-57. [PMID: 23219224 PMCID: PMC3610798 DOI: 10.1016/j.psyneuen.2012.11.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 11/05/2012] [Accepted: 11/05/2012] [Indexed: 11/17/2022]
Abstract
A major problem with current anti-depressant therapy is that it takes on average 6-7 weeks for remission. Since desensitization of serotonin (5-HT)1A receptor signaling contributes to the anti-depressive response, acceleration of the desensitization may reduce this delay in response to antidepressants. The purpose of the present study was to test the hypothesis that estradiol accelerates fluoxetine-induced desensitization of 5-HT1A receptor signaling in the paraventricular nucleus of the hypothalamus (PVN) of rats, via alterations in components of the 5-HT1A receptor signaling pathway. Ovariectomized rats were injected with estradiol and/or fluoxetine, then adrenocorticotropic hormone (ACTH) and oxytocin responses to a 5-HT1A receptor agonist (+)-8-hydroxy-2-dipropylaminotetralin (8-OH-DPAT) were examined to assess the function of 5-HT1A receptors in the PVN. Treatment with estradiol for either 2 or 7 days or fluoxetine for 2 days produced at most a partial desensitization of 5-HT1A receptor signaling, whereas 7 days of fluoxetine produced full desensitization. Combined treatment with estradiol and fluoxetine for 2 days produced nearly a full desensitization, demonstrating an accelerated response compared to either treatment alone. With two days of combined treatments, estradiol prevented the fluoxetine-induced increase in 5-HT1A receptor protein, which could contribute to the more rapid desensitization. Furthermore, EB treatment for 2 days decreased the abundance of the 35 kD Gαz protein which could contribute to the desensitization response. We found two isoforms of Gαz proteins with molecular mass of 35 and 33 kD, which differentially distributed in the detergent resistant microdomain (DRM) and in Triton X-100 soluble membrane region, respectively. The 35 kD Gαz proteins in the DRM can be sumoylated by SUMO1. Stimulation of 5-HT1A receptors with 8-OH-DPAT increases the sumoylation of Gαz proteins and reduces the 33 kD Gαz proteins, suggesting that these responses may be related to the desensitization of 5-HT1A receptors. Treatment with estradiol for 2 days also reduced the levels of the G-protein coupled estrogen receptor GPR30, possibly limiting to the ability of estradiol to produce only a partial desensitization response. These data provide evidence that estradiol may be effective as a short-term adjuvant to SSRIs to accelerate the onset of therapeutic effects.
Collapse
Affiliation(s)
- Qian Li
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, KS
| | - Nicole R. Sullivan
- Department of Pharmacology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL
| | - Carrie E. McAllister
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, KS
| | - Louis D Van de Kar
- Department of Pharmacology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL
| | - Nancy A. Muma
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, Lawrence, KS,Corresponding author: Nancy A. Muma, Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, 1251 Wescoe Hall Drive, 5064 Malott Hall, Lawrence, Kansas 66045, , Phone: 785-864-4002, Fax: 785-864-5219
| |
Collapse
|