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Williams DR, Taylor L, Miter GA, Sheiman JL, Wallace JM, Allen MR, Kohler R, Medeiros C. Synthesis Studies and the Evaluation of C 6 Raloxifene Derivatives. ACS Med Chem Lett 2024; 15:879-884. [PMID: 38894928 PMCID: PMC11181480 DOI: 10.1021/acsmedchemlett.4c00078] [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: 02/22/2024] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024] Open
Abstract
Methodology is described for the synthesis of C6 derivatives of raloxifene, a prescribed drug for the treatment and prevention of osteoporosis. Studies have explored the incorporation of electron-withdrawing substituents at C6 of the benzothiophene core. Efficient processes are also examined to introduce hydrogen bond donor and acceptor functionality. Raloxifene derivatives are evaluated with in vitro testing to determine estrogen receptor (ER) binding affinity and gene expression in MC3T3 cells.
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Affiliation(s)
- David R. Williams
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Levin Taylor
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Gabriel A. Miter
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Johnathan L. Sheiman
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Joseph M. Wallace
- Department
of Biomedical Engineering, Indiana University-Purdue
University, Indianapolis, Indiana 46202, United States
| | - Matthew R. Allen
- Department
of Anatomy, Cell Biology, and Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202 United States
| | - Rachel Kohler
- Department
of Biomedical Engineering, Indiana University-Purdue
University, Indianapolis, Indiana 46202, United States
| | - Claudia Medeiros
- Department
of Biomedical Engineering, Indiana University-Purdue
University, Indianapolis, Indiana 46202, United States
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2
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Sommariva M, Dolci M, Triulzi T, Ambrogi F, Dugo M, De Cecco L, Le Noci V, Bernardo G, Anselmi M, Montanari E, Pupa SM, Signorini L, Gagliano N, Sfondrini L, Delbue S, Tagliabue E. Impact of in vitro SARS-CoV-2 infection on breast cancer cells. Sci Rep 2024; 14:13134. [PMID: 38849411 PMCID: PMC11161491 DOI: 10.1038/s41598-024-63804-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 06/03/2024] [Indexed: 06/09/2024] Open
Abstract
The pandemic of coronavirus disease 19 (COVID-19), caused by severe respiratory syndrome coronavirus 2 (SARS-CoV-2), had severe repercussions for breast cancer patients. Increasing evidence indicates that SARS-CoV-2 infection may directly impact breast cancer biology, but the effects of SARS-CoV-2 on breast tumor cells are still unknown. Here, we analyzed the molecular events occurring in the MCF7, MDA-MB-231 and HCC1937 breast cancer cell lines, representative of the luminal A, basal B/claudin-low and basal A subtypes, respectively, upon SARS-CoV-2 infection. Viral replication was monitored over time, and gene expression profiling was conducted. We found that MCF7 cells were the most permissive to viral replication. Treatment of MCF7 cells with Tamoxifen reduced the SARS-CoV-2 replication rate, suggesting an involvement of the estrogen receptor in sustaining virus replication in malignant cells. Interestingly, a metagene signature based on genes upregulated by SARS-CoV-2 infection in all three cell lines distinguished a subgroup of premenopausal luminal A breast cancer patients with a poor prognosis. As SARS-CoV-2 still spreads among the population, it is essential to understand the impact of SARS-CoV-2 infection on breast cancer, particularly in premenopausal patients diagnosed with the luminal A subtype, and to assess the long-term impact of COVID-19 on breast cancer outcomes.
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Affiliation(s)
- Michele Sommariva
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy.
- Microambiente e Biomarcatori dei Tumori Solidi, Dipartimento di Oncologia Sperimentale, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Amadeo 42, 20133, Milan, Italy.
| | - Maria Dolci
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, Via Pascal 36, 20133, Milan, Italy
| | - Tiziana Triulzi
- Microambiente e Biomarcatori dei Tumori Solidi, Dipartimento di Oncologia Sperimentale, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Amadeo 42, 20133, Milan, Italy
| | - Federico Ambrogi
- Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano, Via Celoria 22, 20133, Milan, Italy
| | - Matteo Dugo
- Department of Medical Oncology, IRCCS Ospedale San Raffaele, Via Olgettina 60, 20132, Milan, Italy
| | - Loris De Cecco
- Integrated Biology of Rare Tumors, Dipartimento di Oncologia Sperimentale, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Amadeo 42, 20133, Milan, Italy
| | - Valentino Le Noci
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy
| | - Giancarla Bernardo
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy
| | - Martina Anselmi
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy
| | - Elena Montanari
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy
| | - Serenella M Pupa
- Microambiente e Biomarcatori dei Tumori Solidi, Dipartimento di Oncologia Sperimentale, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Amadeo 42, 20133, Milan, Italy
| | - Lucia Signorini
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, Via Pascal 36, 20133, Milan, Italy
| | - Nicoletta Gagliano
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy
| | - Lucia Sfondrini
- Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy
- Microambiente e Biomarcatori dei Tumori Solidi, Dipartimento di Oncologia Sperimentale, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Amadeo 42, 20133, Milan, Italy
| | - Serena Delbue
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, Via Pascal 36, 20133, Milan, Italy
| | - Elda Tagliabue
- Microambiente e Biomarcatori dei Tumori Solidi, Dipartimento di Oncologia Sperimentale, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Amadeo 42, 20133, Milan, Italy
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3
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Sakamuru S, Ma D, Pierro JD, Baker NC, Kleinstreuer N, Cali JJ, Knudsen TB, Xia M. Development and validation of CYP26A1 inhibition assay for high-throughput screening. Biotechnol J 2024; 19:e2300659. [PMID: 38863121 DOI: 10.1002/biot.202300659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 03/28/2024] [Accepted: 04/10/2024] [Indexed: 06/13/2024]
Abstract
All-trans retinoic acid (atRA) is an endogenous ligand of the retinoic acid receptors, which heterodimerize with retinoid X receptors. AtRA is generated in tissues from vitamin A (retinol) metabolism to form a paracrine signal and is locally degraded by cytochrome P450 family 26 (CYP26) enzymes. The CYP26 family consists of three subtypes: A1, B1, and C1, which are differentially expressed during development. This study aims to develop and validate a high throughput screening assay to identify CYP26A1 inhibitors in a cell-free system using a luminescent P450-Glo assay technology. The assay performed well with a signal to background ratio of 25.7, a coefficient of variation of 8.9%, and a Z-factor of 0.7. To validate the assay, we tested a subset of 39 compounds that included known CYP26 inhibitors and retinoids, as well as positive and negative control compounds selected from the literature and/or the ToxCast/Tox21 portfolio. Known CYP26A1 inhibitors were confirmed, and predicted CYP26A1 inhibitors, such as chlorothalonil, prochloraz, and SSR126768, were identified, demonstrating the reliability and robustness of the assay. Given the general importance of atRA as a morphogenetic signal and the localized expression of Cyp26a1 in embryonic tissues, a validated CYP26A1 assay has important implications for evaluating the potential developmental toxicity of chemicals.
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Affiliation(s)
- Srilatha Sakamuru
- Division of Pre-clinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland, USA
| | - Dongping Ma
- Promega Corporation, Madison, Wisconsin, USA
| | - Jocylin D Pierro
- Center for Computational Toxicology and Exposure, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | | | - Nicole Kleinstreuer
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | | | - Thomas B Knudsen
- Center for Computational Toxicology and Exposure, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | - Menghang Xia
- Division of Pre-clinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland, USA
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4
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An F, Song J, Chang W, Zhang J, Gao P, Wang Y, Xiao Z, Yan C. Research Progress on the Mechanism of the SFRP-Mediated Wnt Signalling Pathway Involved in Bone Metabolism in Osteoporosis. Mol Biotechnol 2024; 66:975-990. [PMID: 38194214 DOI: 10.1007/s12033-023-01018-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 12/01/2023] [Indexed: 01/10/2024]
Abstract
Osteoporosis (OP) is a metabolic bone disease linked to an elevated fracture risk, primarily stemming from disruptions in bone metabolism. Present clinical treatments for OP merely alleviate symptoms. Hence, there exists a pressing need to identify novel targets for the clinical treatment of OP. Research indicates that the Wnt signalling pathway is modulated by serum-secreted frizzled-related protein 5 (SFRP5), potentially serving as a pivotal regulator in bone metabolism disorders. Moreover, studies confirm elevated SFRP5 expression in OP, with SFRP5 overexpression leading to the downregulation of Wnt and β-catenin proteins in the Wnt signalling pathway, as well as the expression of osteogenesis-related marker molecules such as RUNX2, ALP, and OPN. Conversely, the opposite has been reported when SFRP5 is knocked out, suggesting that SFRP5 may be a key factor involved in the regulation of bone metabolism via the Wnt signalling axis. However, the molecular mechanisms underlying the action of SFRP5-induced OP have yet to be comprehensively elucidated. This review focusses on the molecular structure and function of SFRP5 and the potential molecular mechanisms of the SFRP5-mediated Wnt signalling pathway involved in bone metabolism in OP, providing reasonable evidence for the targeted therapy of SFRP5 for the prevention and treatment of OP.
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Affiliation(s)
- Fangyu An
- Teaching Experiment Training Center, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Jiayi Song
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Weirong Chang
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Jie Zhang
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Peng Gao
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Yujie Wang
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Zhipan Xiao
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China
| | - Chunlu Yan
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China.
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Manickasamy MK, Sajeev A, BharathwajChetty B, Alqahtani MS, Abbas M, Hegde M, Aswani BS, Shakibaei M, Sethi G, Kunnumakkara AB. Exploring the nexus of nuclear receptors in hematological malignancies. Cell Mol Life Sci 2024; 81:78. [PMID: 38334807 PMCID: PMC10858172 DOI: 10.1007/s00018-023-05085-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/16/2023] [Accepted: 12/03/2023] [Indexed: 02/10/2024]
Abstract
Hematological malignancies (HM) represent a subset of neoplasms affecting the blood, bone marrow, and lymphatic systems, categorized primarily into leukemia, lymphoma, and multiple myeloma. Their prognosis varies considerably, with a frequent risk of relapse despite ongoing treatments. While contemporary therapeutic strategies have extended overall patient survival, they do not offer cures for advanced stages and often lead to challenges such as acquisition of drug resistance, recurrence, and severe side effects. The need for innovative therapeutic targets is vital to elevate both survival rates and patients' quality of life. Recent research has pivoted towards nuclear receptors (NRs) due to their role in modulating tumor cell characteristics including uncontrolled proliferation, differentiation, apoptosis evasion, invasion and migration. Existing evidence emphasizes NRs' critical role in HM. The regulation of NR expression through agonists, antagonists, or selective modulators, contingent upon their levels, offers promising clinical implications in HM management. Moreover, several anticancer agents targeting NRs have been approved by the Food and Drug Administration (FDA). This review highlights the integral function of NRs in HM's pathophysiology and the potential benefits of therapeutically targeting these receptors, suggesting a prospective avenue for more efficient therapeutic interventions against HM.
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Affiliation(s)
- Mukesh Kumar Manickasamy
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, Assam, 781039, India
| | - Anjana Sajeev
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, Assam, 781039, India
| | - Bandari BharathwajChetty
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, Assam, 781039, India
| | - Mohammed S Alqahtani
- Radiological Sciences Department, College of Applied Medical Sciences, King Khalid University, 61421, Abha, Saudi Arabia
- BioImaging Unit, Space Research Centre, University of Leicester, Michael Atiyah Building, Leicester, LE1 7RH, UK
| | - Mohamed Abbas
- Electrical Engineering Department, College of Engineering, King Khalid University, 61421, Abha, Saudi Arabia
| | - Mangala Hegde
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, Assam, 781039, India
| | - Babu Santha Aswani
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, Assam, 781039, India
| | - Mehdi Shakibaei
- Chair of Vegetative Anatomy, Department of Human-Anatomy, Musculoskeletal Research Group and Tumor Biology, Institute of Anatomy, Ludwig-Maximilian-University, 80336, Munich, Germany
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117600, Singapore.
- NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117599, Singapore.
| | - Ajaikumar B Kunnumakkara
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, Assam, 781039, India.
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Alva-Chavarría D, Soto-Núñez M, Flores-Soto E, Jaimez R. Hemostatic Effects of Raloxifene in Ovariectomized Rats. Life (Basel) 2023; 13:1612. [PMID: 37511987 PMCID: PMC10381455 DOI: 10.3390/life13071612] [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: 06/28/2023] [Revised: 07/13/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
This study aimed to explore the effects of raloxifene (Rx) and estradiol (E2) on prothrombin time (PT), partial thromboplastin time (APTT), coagulation factors (VII, X, XI), and fibrinogen concentrations in rats. Female rats were ovariectomized 11 days prior to starting the treatment. Afterward, they received Rx or E2 (1, 10, 100, and 1000 µg/kg) or propylene glycol (0.3 mL; vehicle, V) subcutaneously for 3 consecutive days. Plasma was collected to measure the hemostatic parameters. Rx significantly increased PT (8%, at 1000 µg/kg; p < 0.05) and APTT at all doses evaluated (32, 70, 67, 30%; p < 0.05, respectively). Rx (1, 10, 100, and 1000 µg/kg) decreased the activity of factor VII by -20, -40, -37, and -17% (p < 0.05), respectively, and E2 increased it by 9, 34, 52, and 29%. Rx reduced factor X activity at 10 and 100 µg/kg doses (-30, and -30% p < 0.05), and E2 showed an increment of 24% with 1000 µg/kg dose only. Additionally, Rx (1, 10, 100 µg/kg) diminished FXI activity (-71, -62, -66; p < 0.05), E2 (1 and 10 µg/kg) in -60 and -38, respectively (p < 0.05), and Rx (1000 µg/kg) produced an increment of 29% (p < 0.05) in fibrinogen concentration, but not E2. Our findings suggest that raloxifene has a protective effect on hemostasis in rats.
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Affiliation(s)
- Denys Alva-Chavarría
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Maribel Soto-Núñez
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Edgar Flores-Soto
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Ruth Jaimez
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
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Fatica M, D’Antonio A, Novelli L, Triggianese P, Conigliaro P, Greco E, Bergamini A, Perricone C, Chimenti MS. How Has Molecular Biology Enhanced Our Undertaking of axSpA and Its Management. Curr Rheumatol Rep 2023; 25:12-33. [PMID: 36308677 PMCID: PMC9825525 DOI: 10.1007/s11926-022-01092-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2022] [Indexed: 01/11/2023]
Abstract
PURPOSE This review aims at investigating pathophysiological mechanisms in spondyloarthritis (SpA). Analysis of genetic factors, immunological pathways, and abnormalities of bone metabolism lay the foundations for a better understanding of development of the axial clinical manifestations in patients, allowing physician to choose the most appropriate therapeutic strategy in a more targeted manner. RECENT FINDINGS In addition to the contribution of MHC system, findings emerged about the role of non-HLA genes (as ERAP1 and 2, whose inhibition could represent a new therapeutic approach) and of epigenetic mechanisms that regulate the expression of genes involved in SpA pathogenesis. Increasing evidence of bone metabolism abnormalities secondary to the activation of immunological pathways suggests the development of various bone anomalies that are present in axSpA patients. SpA are a group of inflammatory diseases with a multifactorial origin, whose pathogenesis is linked to the genetic predisposition, the action of environmental risk factors, and the activation of immune response. It is now well known how bone metabolism leads to long-term structural damage via increased bone turnover, bone loss and osteoporosis, osteitis, erosions, osteosclerosis, and osteoproliferation. These effects can exist in the same patient over time or even simultaneously. Evidence suggests a cross relationship among innate immunity, autoimmunity, and bone remodeling in SpA, making treatment approach a challenge for rheumatologists. Specifically, treatment targets are consistently increasing as new drugs are upcoming. Both biological and targeted synthetic drugs are promising in terms of their efficacy and safety profile in patients affected by SpA.
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Affiliation(s)
- Mauro Fatica
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Arianna D’Antonio
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Lucia Novelli
- UniCamillus, Saint Camillus International University of Health Sciences, Rome, Italy
| | - Paola Triggianese
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Paola Conigliaro
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Elisabetta Greco
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Alberto Bergamini
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Carlo Perricone
- Rheumatology, Department of Medicine, University of Perugia, Perugia, Italy
| | - Maria Sole Chimenti
- Rheumatology, Allergology and Clinical Immunology, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
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Tran VTH, Pham DV, Choi DY, Park PH. Mitophagy Induction and Aryl Hydrocarbon Receptor-Mediated Redox Signaling Contribute to the Suppression of Breast Cancer Cell Growth by Taloxifene via Regulation of Inflammasomes Activation. Antioxid Redox Signal 2022; 37:1030-1050. [PMID: 35286219 DOI: 10.1089/ars.2021.0192] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aims: Raloxifene, a selective estrogen receptor (ER) modulator, has been reported to exert the tumor-suppressive effects in both ER-positive and ER-negative cancer cells; however, the mechanisms underlying its ER-independent anti-cancer effects are poorly understood. The NLRP3 inflammasome, a critical component of the innate immune system, has recently received growing attention owing to its multifaceted roles in various aspects of cancer development. The present study aimed at examining the involvement of NLRP3 inflammasomes in the anti-breast cancer effects of raloxifene and its underlying mechanisms. Results: Raloxifene significantly inhibited the activation of NLRP3 inflammasomes in various breast cancer cell lines. Importantly, forced expression of a gain-of-function variant of NLRP3 rescued breast cancer cells from growth arrest by raloxifene, suggesting that the suppression of NLRP3 inflammasomes activation mediates the raloxifene-induced inhibition of breast cancer growth. Mechanistically, raloxifene suppressed NLRP3 inflammasomes activation by lowering the cellular levels of reactive oxygen species (ROS) through the modulation of redox signaling mediated via aryl hydrocarbon receptor (AhR)-nuclear factor erythroid 2-related factor 2 (Nrf2)-heme oxygenase-1 (HO-1) axis or the impaired generation of mitochondrial ROS in a mitophagy-dependent manner. Further, the blockage of AhR signaling or inhibition of mitophagy abolished the tumor-suppressive effect of raloxifene in a human breast tumor xenograft model. Innovation: We elucidate a novel molecular mechanism underlying the breast tumor suppressing effect of raloxifene. Conclusion: The results observed in this study suggest that the modulation of NLRP3 inflammasomes activation is a critical event in the inhibition of breast tumor growth by raloxifene. Antioxid. Redox Signal. 37, 1030-1050.
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Affiliation(s)
- Van Thi-Hong Tran
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Duc-Vinh Pham
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Dong-Young Choi
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
| | - Pil-Hoon Park
- College of Pharmacy, Yeungnam University, Gyeongsan, Republic of Korea
- Research Institute of Cell Culture, Yeungnam University, Gyeongsan, Republic of Korea
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9
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The Regulatory Role of Lipid Metabolism in Endometrial Cancer. JOURNAL OF ONCOLOGY 2022; 2022:6458877. [PMID: 36072980 PMCID: PMC9444396 DOI: 10.1155/2022/6458877] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/12/2022] [Indexed: 12/24/2022]
Abstract
Endometrial cancer is the 6th most common carcinoma as well as the 2nd most common malignancy worldwide in women. It is closely related to fat content, and dyslipidemia is among the most significant metabolic changes in this cancer. Therefore, further understanding of the regulation mechanism in lipid metabolism of endometrial cancer is conducive to the development of better therapeutic strategies and methods. Here, we systematically review the signaling pathways that regulate lipid metabolism in endometrial cancer and the research progress of drugs and targeted therapies that act on lipid metabolism by retrieving relevant articles. The underlying mechanism of occurrence and development of endometrial cancer is relatively clear and comprehensively reviewed here. But following more research studies will help to illuminate more specific regulatory roles of lipid metabolism in endometrial cancer and explore new possible mechanisms, prognostic and therapeutic targets, and subsequent drugs. Our review will provide a full view for the following investigation of lipid metabolism in endometrial cancer.
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10
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Booyens RM, Engelbrecht AM, Strauss L, Pretorius E. To clot, or not to clot: The dilemma of hormone treatment options for menopause. Thromb Res 2022; 218:99-111. [PMID: 36030662 DOI: 10.1016/j.thromres.2022.08.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 08/04/2022] [Accepted: 08/15/2022] [Indexed: 12/01/2022]
Abstract
Untreated menopause may have serious health implications, but treatments can have dangerous side effects. We evaluate menopausal symptoms as well as available treatments -the routes of administration and their effect on blood coagulation. Menopausal females may experience hot flushes, vulva- and vaginal atrophy and osteoporosis. Many treatments are available to relieve these symptoms such as Conjugated Equine Estrogen and bioidentical hormones. The routes of administration include oral and transdermal. Hormones that are administered orally undergo a hepatic first pass metabolism. The by-products have a lower efficacy and possibly enhanced side effects. Furthermore, hormone treatments influence the coagulation cascade through coagulation factors or their regulators. Increased coagulation poses a risk for venous thromboembolism. Currently a definite conclusion on whether the side effects from hormone treatments exceed the risk of untreated menopause cannot be made. However, a more individualised approach to hormone treatments may be the most feasible solution to this dilemma.
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Affiliation(s)
- Renata M Booyens
- Department of Physiological Sciences, Faculty of Science, Stellenbosch University, Stellenbosch, South Africa
| | - Anna-Mart Engelbrecht
- Department of Physiological Sciences, Faculty of Science, Stellenbosch University, Stellenbosch, South Africa
| | - Ledivia Strauss
- Functional Medicine Practice, A1 Polo Village Offices, Kliprug Minor Rd, Val De Vie Winelands Lifestyle Estate, 7646, South Africa
| | - Etheresia Pretorius
- Department of Physiological Sciences, Faculty of Science, Stellenbosch University, Stellenbosch, South Africa.
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Nuclear receptor RORγ inverse agonists/antagonists display tissue- and gene-context selectivity through distinct activities in altering chromatin accessibility and master regulator SREBP2 occupancy. Pharmacol Res 2022; 182:106324. [PMID: 35750301 PMCID: PMC10158160 DOI: 10.1016/j.phrs.2022.106324] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/26/2022] [Accepted: 06/19/2022] [Indexed: 11/21/2022]
Abstract
The nuclear receptor RORγ is a major driver of autoimmune diseases and certain types of cancer due to its aberrant function in T helper 17 (Th17) cell differentiation and tumor cholesterol metabolism, respectively. Compound screening using the classic receptor-coactivator interaction perturbation scheme led to identification of many small-molecule modulators of RORγ(t). We report here that inverse agonists/antagonists of RORγ such as VTP-43742 derivative VTP-23 and TAK828F, which can potently inhibit the inflammatory gene program in Th17 cells, unexpectedly lack high potency in inhibiting the growth of TNBC tumor cells. In contrast, antagonists such as XY018 and GSK805 that strongly suppress tumor cell growth and survival display only modest activities in reducing Th17-related cytokine expression. Unexpectedly, we found that VTP-23 significantly induces the cholesterol biosynthesis program in TNBC cells. Our further mechanistic analyses revealed that VTP-23 enhances the local chromatin accessibility, H3K27ac mark and the cholesterol master regulator SREBP2 recruitment at the RORγ binding sites, whereas XY018 exerts the opposite activities. Yet, they display similar inhibitory effects on circadian rhythm program. Similar distinctions and contrasting activities between TAK828F and SR2211 in their effects on local chromatin structure at Il17 genes were also observed. Together, our study shows for the first-time that structurally distinct RORγ antagonists possess different or even contrasting activities in tissue/cell-specific manner. Our findings also highlight that the activities at natural chromatin are key determinants of RORγ modulators' tissue selectivity.
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Berman AG, Damrath JG, Hatch J, Pulliam AN, Powell KM, Hinton M, Wallace JM. Effects of Raloxifene and tibial loading on bone mass and mechanics in male and female mice. Connect Tissue Res 2022; 63:3-15. [PMID: 33427519 PMCID: PMC8272732 DOI: 10.1080/03008207.2020.1865938] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Purpose: Raloxifene (RAL) is a selective estrogen receptor modulator (SERM) that has previously been shown to cause acellular benefits to bone tissue. Due to these improvements, RAL was combined with targeted tibial loading to assess if RAL treatment during periods of active bone formation would allow for further mechanical enhancements.Methods: Structural, mechanical, and microstructural effects were assessed in bone from C57BL/6 mice that were treated with RAL (0.5 mg/kg), tibial loading, or both for 6 weeks, beginning at 10 weeks of age.Results:Ex vivo microcomputed tomography (CT) images indicated RAL and loading work together to improve bone mass and architecture, especially within the cancellous region of males. Increases in cancellous bone volume fraction were heavily driven by increases in trabecular thickness, though there were some effects on trabecular spacing and number. In the cortical regions, RAL and loading both increased cross-sectional area, cortical area, and cortical thickness. Whole-bone mechanical testing primarily indicated the effects of loading. Further characterization through Raman spectroscopy and nanoindentation showed load-based changes in mineralization and micromechanics, while both loading and RAL caused changes in the secondary collagen structure. In contrast to males, in females, there were large load-based effects in the cancellous and cortical regions, resulting in increased whole-bone mechanical properties. RAL had less of an effect on cancellous and cortical architecture, though some effects were still present.Conclusion: RAL and loading work together to impact bone architecture and mechanical integrity, leading to greater improvements than either treatment individually.
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Affiliation(s)
- Alycia G. Berman
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - John G. Damrath
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Jennifer Hatch
- Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Alexis N. Pulliam
- Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Katherine M. Powell
- Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Madicyn Hinton
- Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Joseph M. Wallace
- Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA,Corresponding Author Joseph M. Wallace, Ph.D., Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA, , +1-317-274-2448
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Zanfirescu A, Nitulescu G, Mihai DP, Nitulescu GM. Identifying FAAH Inhibitors as New Therapeutic Options for the Treatment of Chronic Pain through Drug Repurposing. Pharmaceuticals (Basel) 2021; 15:38. [PMID: 35056095 PMCID: PMC8781999 DOI: 10.3390/ph15010038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 12/16/2021] [Accepted: 12/23/2021] [Indexed: 01/29/2023] Open
Abstract
Chronic pain determines a substantial burden on individuals, employers, healthcare systems, and society. Most of the affected patients report dissatisfaction with currently available treatments. There are only a few and poor therapeutic options-some therapeutic agents are an outgrowth of drugs targeting acute pain, while others have several serious side effects. One of the primary degradative enzymes for endocannabinoids, fatty acid amide hydrolase (FAAH) attracted attention as a significant molecular target for developing new therapies for neuropsychiatric and neurological diseases, including chronic pain. Using chemical graph mining, quantitative structure-activity relationship (QSAR) modeling, and molecular docking techniques we developed a multi-step screening protocol to identify repurposable drugs as FAAH inhibitors. After screening the DrugBank database using our protocol, 273 structures were selected, with five already approved drugs, montelukast, repaglinide, revefenacin, raloxifene, and buclizine emerging as the most promising repurposable agents for treating chronic pain. Molecular docking studies indicated that the selected compounds interact with the enzyme mostly non-covalently (except for revefenacin) through shape complementarity to the large substrate-binding pocket in the active site. A molecular dynamics simulation was employed for montelukast and revealed stable interactions with the enzyme. The biological activity of the selected compounds should be further confirmed by employing in vitro and in vivo studies.
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Affiliation(s)
- Anca Zanfirescu
- Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia 6, 020956 Bucharest, Romania
| | - Georgiana Nitulescu
- Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia 6, 020956 Bucharest, Romania
| | - Dragos Paul Mihai
- Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia 6, 020956 Bucharest, Romania
| | - George Mihai Nitulescu
- Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia 6, 020956 Bucharest, Romania
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The Effects of Osteoporotic and Non-osteoporotic Medications on Fracture Risk and Bone Mineral Density. Drugs 2021; 81:1831-1858. [PMID: 34724173 PMCID: PMC8578161 DOI: 10.1007/s40265-021-01625-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/11/2021] [Indexed: 12/26/2022]
Abstract
Osteoporosis is a highly prevalent bone disease affecting more than 37.5 million individuals in the European Union (EU) and the United States of America (USA). It is characterized by low bone mineral density (BMD), impaired bone quality, and loss of structural and biomechanical properties, resulting in reduced bone strength. An increase in morbidity and mortality is seen in patients with osteoporosis, caused by the approximately 3.5 million new osteoporotic fractures occurring every year in the EU. Currently, different medications are available for the treatment of osteoporosis, including anti-resorptive and osteoanabolic medications. Bisphosphonates, which belong to the anti-resorptive medications, are the standard treatment for osteoporosis based on their positive effects on bone, long-term experience, and low costs. However, not only medications used for the treatment of osteoporosis can affect bone: several other medications are suggested to have an effect on bone as well, especially on fracture risk and BMD. Knowledge about the positive and negative effects of different medications on both fracture risk and BMD is important, as it can contribute to an improvement in osteoporosis prevention and treatment in general, and, even more importantly, to the individual's health. In this review, we therefore discuss the effects of both osteoporotic and non-osteoporotic medications on fracture risk and BMD. In addition, we discuss the underlying mechanisms of action.
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Sun Y, Xiong Y, Meng YL, Santos HO, Athayde FL, de Souza IGO, Yang L. Effects of raloxifene administration on serum levels of insulin-like growth factor-1 and insulin-like growth factor-binding protein 3 levels: A systematic review and meta-analysis of randomized controlled trials. Growth Horm IGF Res 2021; 60-61:101421. [PMID: 34384975 DOI: 10.1016/j.ghir.2021.101421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To ascertain the clinical magnitude of raloxifene administration on insulin-like growth factor-1 (IGF-1) and insulin-like growth factor-binding protein 3 (IGFBP-3) levels. METHODS A systematic comprehensive search was performed without language limitation up to 14 December 2020. We included only trials that assessed the effect of raloxifene on IGF-1 and IGFBP-3 in adults. Meta-analysis was performed using the Stata software (Stata Corp. College Station, Texas, USA). RESULTS Seven arms were included, encompassing postmenopausal women with type 2 diabetes mellitus, postmenopausal women with breast cancer, healthy postmenopausal women, and healthy elderly men. Raloxifene therapy significantly reduced IGF-1 levels (WMD: -2.92 nmol/L, 95% CI: -3.49, -2.35, p < 0.001) compared to placebo. Raloxifene dosage ˃60 mg/day (WMD: -3.29 ng/mL, 95% CI: -3.50 to -3.08, I2 = 0.0%) decreased IGF-1 levels more than 60 mg/day (WMD: -2.29 ng/mL, 95% CI: -2.90 to -1.69, I2 = 16%). Moreover, intervention duration ˃26 weeks (WMD: -3.48 ng/mL, 95% CI: -5.26 to -1.69, I2 = 0.0%) reduced IGF-1 levels more than ˂26 weeks (WMD: -2.55 ng/mL, 95% CI: -3.31 to -1.79, I2 = 92%). In contrast, overall results from the random-effects model did not suggest a significant change in IGFBP-3 levels upon raloxifene therapy. CONCLUSION Raloxifene therapy significantly reduced serum levels of IGF-1 levels but without changes in IGFPB-3 levels.
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Affiliation(s)
- Yan Sun
- Department of Internal Medicine, College of Clinical Medicine, QiLu Medical University, Zibo, Shandong 255300, China
| | - Ying Xiong
- Department of Pharmacy, Fifth Hospital in WuHan, Wuhan, Hubei 430050, China
| | - Yong Liang Meng
- Departmeng of Surgery, College of Clinical Medicine, QiLu Medical University, Zibo, Shandong 255300, China
| | - Heitor O Santos
- School of Medicine, Federal University of Uberlandia (UFU), Uberlandia, Minas Gerais, Brazil
| | - Felipe L Athayde
- School of Medicine, Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil
| | - Ivan G O de Souza
- Universidade Salvador (UNIFACS), Salvador, Bahia, Escola de Ciências da Saúde, Brazil
| | - Ling Yang
- Department of Endocrinology, Punan Hospital, Pudong New Area, Shanghai 200125, China.
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Mahadik N, Bhattacharya D, Padmanabhan A, Sakhare K, Narayan KP, Banerjee R. Targeting steroid hormone receptors for anti-cancer therapy-A review on small molecules and nanotherapeutic approaches. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 14:e1755. [PMID: 34541822 DOI: 10.1002/wnan.1755] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 12/11/2022]
Abstract
The steroid hormone receptors (SHRs) among nuclear hormone receptors (NHRs) are steroid ligand-dependent transcription factors that play important roles in the regulation of transcription of genes promoted via hormone responsive elements in our genome. Aberrant expression patterns and context-specific regulation of these receptors in cancer, have been routinely reported by multiple research groups. These gave an window of opportunity to target those receptors in the context of developing novel, targeted anticancer therapeutics. Besides the development of a plethora of SHR-targeting synthetic ligands and the availability of their natural, hormonal ligands, development of many SHR-targeted, anticancer nano-delivery systems and theranostics, especially based on small molecules, have been reported. It is intriguing to realize that these cytoplasmic receptors have become a hot target for cancer selective delivery. This is in spite of the fact that these receptors do not fall in the category of conventional, targetable cell surface bound or transmembrane receptors that enjoy over-expression status. Glucocorticoid receptor (GR) is one such exciting SHR that in spite of it being expressed ubiquitously in all cells, we discovered it to behave differently in cancer cells, thus making it a truly druggable target for treating cancer. This review selectively accumulates the knowledge generated in the field of SHR-targeting as a major focus for cancer treatment with various anticancer small molecules and nanotherapeutics on progesterone receptor, mineralocorticoid receptor, and androgen receptor while selectively emphasizing on GR and estrogen receptor. This review also briefly highlights lipid-modification strategy to convert ligands into SHR-targeted cancer nanotherapeutics. This article is categorized under: Therapeutic Approaches and Drug Discovery > Nanomedicine for Oncologic Disease Biology-Inspired Nanomaterials > Lipid-Based Structures Therapeutic Approaches and Drug Discovery > Emerging Technologies.
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Affiliation(s)
- Namita Mahadik
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Dwaipayan Bhattacharya
- Department of Biological Sciences, Birla Institute of Technology Pilani, Hyderabad, India
| | - Akshaya Padmanabhan
- Department of Biological Sciences, Birla Institute of Technology Pilani, Hyderabad, India
| | - Kalyani Sakhare
- Department of Biological Sciences, Birla Institute of Technology Pilani, Hyderabad, India
| | - Kumar Pranav Narayan
- Department of Biological Sciences, Birla Institute of Technology Pilani, Hyderabad, India
| | - Rajkumar Banerjee
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
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Fiani B, Newhouse A, Sarhadi KJ, Arshad M, Soula M, Cathel A. Special Considerations to Improve Clinical Outcomes in Patients with Osteoporosis Undergoing Spine Surgery. Int J Spine Surg 2021; 15:386-401. [PMID: 33900998 PMCID: PMC8059385 DOI: 10.14444/8050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Osteoporosis is a condition that is commonly encountered, with increasing diagnosis by the medical community with the aging population. Osteoporosis leaves patients susceptible to fragility fractures in the vertebrae and is also associated with degenerative changes, both of which may require intervention from a spine surgeon. The goal of this review is to concisely outline special nonoperative adjuncts, as well as preoperative, intraoperative, and postoperative considerations of osteoporotic patients undergoing spine intervention. METHODS A literature analysis was completed for this narrative review. A database search of PubMed and Google Scholar was conducted using "osteoporosis" combined with "spine," "spine surgery," and "spinal fusion" without exclusion based on publication date. Articles were screened to exclude duplicate articles and screened for their full text and English language availability. RESULTS The database search yielded recent publications from which the narrative review was completed. CONCLUSIONS Preoperatively, screening is traditionally completed with dual-energy x-ray absorptiometry (DEXA). Pharmacological therapy modalities currently include teriparatide, raloxifene, denosumab, bisphosphonates, and calcitonin. In order to prevent operative complications associated with osteoporosis, surgeons have found success in increasing the diameter and the length of pedicle screws, limiting pedicle tapping, achieving bicortical or even tricortical purchase, augmenting with polymethyl methacrylate, using iliosacral stabilization, preventing positive sagittal balance, and using adequate fusion products when necessary. Postoperatively, it is important to implant a care plan that includes adequate pain control and necessary care, and to understand risks associated with falls may increase risk of postoperative fragility fractures as well as instrumentation displacement. At this time there are no recommendations in regard to bracing in the postoperative setting. CLINICAL RELEVANCE This review article outlines the most current evidence-based medicine with regard to considerations in spine surgery of the osteoporotic patient, and aims to bring about new questions to be investigated in that paradigm.
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Affiliation(s)
- Brian Fiani
- Department of Neurosurgery, Desert Regional Medical Center, Palm Springs, California
| | - Alexander Newhouse
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois
| | | | - Mohammad Arshad
- Department of Neurosurgery, Desert Regional Medical Center, Palm Springs, California
| | - Marisol Soula
- New York University School of Medicine, New York University, New York, New York
| | - Alessandra Cathel
- Department of Neurosurgery, Desert Regional Medical Center, Palm Springs, California
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Carneiro ALB, Spadella APC, de Souza FA, Alves KBF, de Araujo-Neto JT, Haidar MA, Dardes RDCDM. Effects of Raloxifene Combined with Low-dose Conjugated Estrogen on the Endometrium in Menopausal Women at High Risk for Breast Cancer. Clinics (Sao Paulo) 2021; 76:e2380. [PMID: 33503193 PMCID: PMC7798121 DOI: 10.6061/clinics/2021/e2380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 11/10/2020] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVES To compare the effects of low-dose conjugated estrogen (CE), raloxifene, and the combination thereof on the endometrium of postmenopausal women. METHODS Postmenopausal women between 45 and 60 years of age, with Gail score≥1.67 and no endometrial disorders, were randomly assigned to receive low-dose CE (0.3 mg), raloxifene (60 mg), or combined therapy for 1 year. Transvaginal ultrasound was performed at baseline and every 3 months; the Kupperman Index was assessed at baseline and every 6 months. Endometrial biopsies were performed if endometrial thickness (ET) was ≥5 mm or if vaginal bleeding occurred. The primary outcome was the occurrence of ET≥5 mm over the one-year period. RESULTS Seventy-three women were randomly assigned and analyzed on an intent-to-treat basis. Eight, three, and four women in the CE, raloxifene, and combination groups, respectively, exhibited ET≥5 mm. No genital bleeding was reported in the combination group. Endometrial biopsy revealed atrophy or polyps in all groups, with one patient in the CE group exhibiting a proliferative endometrium without atypia. At 6 months, there was a progressive increase in mean ET in the CE group, but not in the other two groups, with statistically significant differences at 6, 9, and 12 months. Mean scores for vasomotor symptoms and Kupperman Index favored the CE and combination groups over raloxifene. CONCLUSION Combined raloxifene and low-dose CE decreased the severity of menopausal symptoms to a similar extent as CE alone and had similar effects as raloxifene alone on the endometrium.
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Affiliation(s)
- Andrea Lucia Bastos Carneiro
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
| | - Ana Paula Curi Spadella
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
| | - Fabiola Amaral de Souza
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
| | - Karen Borelli Ferreira Alves
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
| | - Joaquim Teodoro de Araujo-Neto
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
| | - Mauro Abi Haidar
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
| | - Rita de Cássia de Maio Dardes
- Departamento de Ginecologia, Escola Paulista de Medicina (EPM), Universidade Federal de Sao Paulo (UNIFESP), Sao Paulo, SP, BR
- *Corresponding author. E-mail:
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Du T, Sun R, Li L, Ebuzoeme C, Bui D, Zheng Z, Yin T, Liang D, Hu M, Gao S. Development and validation of ultra-high-performance liquid chromatography-mass spectrometry method for the determination of raloxifene and its phase II metabolites in plasma: Application to pharmacokinetic studies in rats. J Sep Sci 2020; 43:4414-4423. [PMID: 33119204 DOI: 10.1002/jssc.202000835] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/06/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
The aim of this study is to establish a reliable liquid chromatography-mass spectrometry method to simultaneously quantitate raloxifene, and its major metabolites, raloxifene-6-glucuronide, raloxifene-4'-glucuronide, and raloxifene-6-sulfate in rat plasma samples for pharmacokinetic studies. The separation of the analytes was achieved on a Waters BEH C18 column. Water (0.1% formic acid) and acetonitrile were used as the mobile phases for elution. A one-step protein precipitation using a mixture solvent was applied for plasma sample preparation. The method was validated following the FDA guidance. The results showed that the linear range were 1.95-1000 nM for raloxifene-6-glucuronide, and raloxifene-4'-glucuronide, 0.195-100 nM for raloxifene-6-sulfate, and 0.195-200 nM for raloxifene, respectively. The lower limit of quantification was 1.95, 1.95, 0.195, and 0.195 nM for raloxifene-6-glucuronide, raloxifene-4'-glucuronide, raloxifene-6-sulfate, and raloxifene, respectively. Only 20 µl of plasma sample was required since the method is sensitive. The intra- and interday variance is <15% and the accuracy is within 85-115%. The variance of matrix effect and recovery were <15%. The method was successfully applied in a pharmacokinetic study in rats with oral administration of raloxifene.
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Affiliation(s)
- Ting Du
- Department of Pharmaceutical and Environmental Health Sciences, College of Pharmacy and Health sciences, Texas Southern University, Houston, Texas, USA
| | - Rongjin Sun
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, The University of Houston, Houston, Texas, USA
| | - Li Li
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, The University of Houston, Houston, Texas, USA
| | - Christabel Ebuzoeme
- Department of Pharmaceutical and Environmental Health Sciences, College of Pharmacy and Health sciences, Texas Southern University, Houston, Texas, USA
| | - Dinh Bui
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, The University of Houston, Houston, Texas, USA
| | - Zicong Zheng
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, The University of Houston, Houston, Texas, USA
| | - Taijun Yin
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, The University of Houston, Houston, Texas, USA
| | - Dong Liang
- Department of Pharmaceutical and Environmental Health Sciences, College of Pharmacy and Health sciences, Texas Southern University, Houston, Texas, USA
| | - Ming Hu
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, The University of Houston, Houston, Texas, USA
| | - Song Gao
- Department of Pharmaceutical and Environmental Health Sciences, College of Pharmacy and Health sciences, Texas Southern University, Houston, Texas, USA
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Raloxifene as Treatment for Various Types of Brain Injuries and Neurodegenerative Diseases: A Good Start. Int J Mol Sci 2020; 21:ijms21207586. [PMID: 33066585 PMCID: PMC7589740 DOI: 10.3390/ijms21207586] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 02/06/2023] Open
Abstract
Recent studies have shown that the selective estrogen receptor modulator (SERM) raloxifene had pronounced protective effects against progressing brain damage after traumatic brain injury (TBI) in mice. These studies, indicating beneficial effects of raloxifene for brain health, prompted the study of the history and present state of knowledge of this topic. It appears that, apart from raloxifene, to date, four nonrelated compounds have shown comparable beneficial effects—fucoidan, pifithrin, SMM-189 (5-dihydroxy-phenyl]-phenyl-methanone), and translocator protein (TSPO) ligands. Raloxifene, however, is ahead of the field, as for more than two decades it has been used in medical practice for various chronic ailments in humans. Thus, apart from different types of animal and cell culture studies, it has also been assessed in various human clinical trials, including assaying its effects on mild cognitive impairments. Regarding cell types, raloxifene protects neurons from cell death, prevents glial activation, ameliorates myelin damage, and maintains health of endothelial cells. At whole central nervous system (CNS) levels, raloxifene ameliorated mild cognitive impairments, as seen in clinical trials, and showed beneficial effects in animal models of Parkinson’s disease. Moreover, with stroke and TBI in animal models, raloxifene showed curative effects. Furthermore, raloxifene showed healing effects regarding multiple sclerosis (MS) and amyotrophic lateral sclerosis (ALS) in cell culture. The adverse biological signals typical of these conditions relate to neuronal activity, neurotransmitters and their receptors, plasticity, inflammation, oxidative stress, nitric oxide, calcium homeostasis, cell death, behavioral impairments, etc. Raloxifene favorably modulates these signals toward cell health—on the one hand, by modulating gene expression of the relevant proteins, for example by way of its binding to the cell nuclear estrogen receptors ERα and ERβ (genomic effects) and, on the other hand (nongenomic effects) by modulation of mitochondrial activity, reduction of oxidative stress and programmed cell death, maintaining metabolic balance, degradation of Abeta, and modulation of intracellular cholesterol levels. More specifically regarding Alzheimer’s disease, raloxifene may not cure diagnosed Alzheimer’s disease. However, the onset of Alzheimer’s disease may be delayed or arrested by raloxifene’s capability to attenuate mild cognitive impairment. Mild cognitive impairment is a condition that may precede diagnosis of Alzheimer’s disease. In this review, relatively new insights are addressed regarding the notion that Alzheimer’s disease can be caused by bacterial (as well as viral) infections, together with the most recent findings that raloxifene can counteract infections of at least some bacterial and viral strains. Thus, here, an overview of potential treatments of neurodegenerative disease by raloxifene is presented, and attention is paid to subcellular molecular biological pathways that may be involved.
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Oceguera-Basurto P, Topete A, Oceguera-Villanueva A, Rivas-Carrillo J, Paz-Davalos M, Quintero-Ramos A, Del Toro-Arreola A, Daneri-Navarro A. Selective estrogen receptor modulators in the prevention of breast cancer in premenopausal women: a review. Transl Cancer Res 2020; 9:4444-4456. [PMID: 35117809 PMCID: PMC8797886 DOI: 10.21037/tcr-19-1956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 06/15/2020] [Indexed: 12/28/2022]
Abstract
The detection of premenopausal women at high risk of breast cancer is key to chemoprevention. Therapy with selective estrogen receptor modulators (SERMs) induces a significant antiproliferative effect in estrogen receptor (ER) positive breast cancer. This review was designed according the guidelines of the 2009 PRISMA statement. Searching different databases, including PubMed, MedlinePlus, PLoS One, Cochrane Breast Cancer Specialized Register, Clinical Trials.gov and American Society of Clinical Oncology. From 168 records screened, 15 full text articles were assessed for eligibility and only 7 studies met the inclusion criteria. Three of the studies included analyzed changes in Ki-67 expression, revealing weaker expression after treatment with acolbifene and raloxifene (P<0.001). Three studies also analyzed the breast volume by magnetic resonance imagining (MRI) and demonstrate a significant difference after 1 year with raloxifene treatment (P=0.0017). Moreover, a 20% reduction in breast density was observed after a 2-year treatment with tamoxifen in premenopausal women. SERMs reduce the risk of developing breast cancer. The studies reviewed here demonstrate the modulation of Ki-67 expression and changes in breast density, suggesting an important preventive role for this group of drugs in prevention for premenopausal women at high risk of developing breast cancer.
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Affiliation(s)
- Paola Oceguera-Basurto
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
| | - Antonio Topete
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
| | | | - Jorge Rivas-Carrillo
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
| | | | - Antonio Quintero-Ramos
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
| | - Alicia Del Toro-Arreola
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
| | - Adrián Daneri-Navarro
- Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México
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Bens A, Langballe R, Bernstein JL, Cronin-Fenton D, Friis S, Mellemkjaer L. Preventive drug therapy and contralateral breast cancer: summary of the evidence of clinical trials and observational studies. Acta Oncol 2019; 58:1581-1593. [PMID: 31393200 DOI: 10.1080/0284186x.2019.1643915] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Background: Breast cancer patients have a lifelong 2-4-fold increased risk of developing a second primary tumor in the contralateral breast compared with the risk for a first primary breast cancer in the general female population. Prevention of contralateral breast cancer (CBC) has received increased attention during recent decades. Here, we summarize and discuss the available literature on drug preventive therapy and CBC.Results: The endocrine-targetting drugs, tamoxifen and aromatase inhibitors are used as standard adjuvant treatment for estrogen receptor (ER)-positive breast cancer. Both are associated with relative risk reductions of CBC of up to 50%, but incur serious side effects. Several prescription drugs originally developed for other purposes, including bisphosphonates, statins, non-steroidal anti-inflammatory drugs, metformin, anti-hypertensives and retinoids, have shown anti-cancer activity in preclinical models. However, results of observational studies on CBC are sparse and inconsistent, with only statins demonstrating promise as preventive agents and a potential treatment option for ER-negative breast cancer patients.Conclusion: Future studies are needed to assess the effect of statins in risk reduction and to identify other drugs with chemopreventive potential against CBC. Eventually, efforts must be directed towards identifying those breast cancer patients likely to benefit most from specific preventive therapies.
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Affiliation(s)
- Annet Bens
- Unit of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Rikke Langballe
- Unit of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Copenhagen, Denmark
| | | | | | - Søren Friis
- Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
- Unit of Statistics and Pharmacoepidemiology, Danish Cancer Society Research Center, Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Lene Mellemkjaer
- Unit of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Copenhagen, Denmark
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Shen HH, Yang CY, Kung CW, Chen SY, Wu HM, Cheng PY, Lam KK, Lee YM. Raloxifene inhibits adipose tissue inflammation and adipogenesis through Wnt regulation in ovariectomized rats and 3 T3-L1 cells. J Biomed Sci 2019; 26:62. [PMID: 31470850 PMCID: PMC6717377 DOI: 10.1186/s12929-019-0556-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 08/22/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Loss of ovarian function, as in menopause or after ovariectomy (OVX), is closely associated with obesity and white adipose tissue (WAT) inflammation. Estrogen replacement protects against postmenopausal obesity but increases the risks of carcinogenesis. In the present study, we investigated the effects of long-term treatment of raloxifene (RAL), a selective estrogen receptor modulator, on the features of estrogen deficiency-induced obesity and explored the involvement of canonical and non-canonical Wnt regulation in vivo and in vitro. METHODS Adult female rats received bilateral OVX and divided into 5 groups: (1) Sham, (2) OVX, (3) OVX + E2: OVX rats were administered with E2 (50 μg/kg, s.c., 3 times/week), (4) OVX + RAL: OVX rats were treated with RAL (gavage, 1 mg/kg/day) suspended in 0.8% carboxymethylcellulose (CMC), (5) OVX + CMC: 0.8% CMC as vehicle control. All treatments were given for 8 weeks beginning at 1 week after OVX. In 3 T3-L1 cells, the effects of RAL on adipogenesis and lipopolysaccharide (LPS)-induced inflammation were evaluated. RESULTS Treatment with RAL significantly decreased body weight, visceral fat pad mass, adipocyte size and plasma levels of glucose but increased plasma adiponectin. RAL reduced the elevation of HIF-1α, VEGF-A and proinflammatory cytokines (MCP-1 and TNF-α) expression by inhibition of NF-κB p65 and JNK cascades in retroperitoneal WAT. This anti-inflammatory capacity of RAL may result from upregulation of secreted frizzle-related protein 5 (SFRP5), an adipokine that repressed Wnt5a signaling. Furthermore, RAL inhibited adipogenic factors such as PPAR-γ, C/EBP-α, and FABP4, and preserved canonical Wnt10b/β-catenin protein expression. In 3 T3-L1 adipocytes, RAL (20 μM) diminished lipid accumulation and inhibited adipogenic factors accompanied with the induction of β-catenin, which were effectively reversed by the β-catenin inhibitor IWR-1-endo. In addition, RAL reduced LPS-induced NF-κB p65 and p-IκB expression as well as TNF-α secretion. Suppression of SFRP5 by small interfering RNA significantly abrogated the anti-inflammatory effects of RAL. CONCLUSIONS Distinct activation of canonical β-catenin on inhibition of adipogenesis and non-canonical SFRP5 on suppression of WAT inflammation may contribute to the beneficial effects of RAL. Therefore, this study provides a rationale for the therapeutic potential of RAL for postmenopausal obesity.
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Affiliation(s)
- Hsin-Hsueh Shen
- 0000 0004 0634 0356grid.260565.2Department and Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan
- 0000 0004 0634 0356grid.260565.2Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
- 0000 0004 0634 0356grid.260565.2Department of Pharmacy Practice, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chien-Yi Yang
- 0000 0004 0638 9360grid.278244.fDivision of General Surgery, Department of Surgery, Tri-Service General Hospital Sungshan Branch, Taipei, Taiwan
| | - Ching-Wen Kung
- 0000 0004 0622 7222grid.411824.aDepartment of Nursing, Tzu Chi University of Science and Technology, Hualien, Taiwan
| | - Shu-Ying Chen
- 0000 0004 1770 3722grid.411432.1Department of Nursing, Hung Kuang University, Taichung, Taiwan
| | - Hong-Min Wu
- 0000 0004 0634 0356grid.260565.2Department and Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan
| | - Pao-Yun Cheng
- 0000 0004 0634 0356grid.260565.2Department of Physiology & Biophysics, National Defense Medical Center, Taipei, Taiwan
| | - Kwok-Keung Lam
- 0000 0000 9337 0481grid.412896.0Department of Pharmacology, Taipei Medical University, Taipei, Taiwan
- Department of Anesthesiology, Catholic Mercy Hospital, Hsinchu, Taiwan
| | - Yen-Mei Lee
- 0000 0004 0634 0356grid.260565.2Department and Institute of Pharmacology, National Defense Medical Center, Taipei, Taiwan
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Kelly RR, McDonald LT, Jensen NR, Sidles SJ, LaRue AC. Impacts of Psychological Stress on Osteoporosis: Clinical Implications and Treatment Interactions. Front Psychiatry 2019; 10:200. [PMID: 31024360 PMCID: PMC6465575 DOI: 10.3389/fpsyt.2019.00200] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/20/2019] [Indexed: 02/06/2023] Open
Abstract
The significant biochemical and physiological effects of psychological stress are beginning to be recognized as exacerbating common diseases, including osteoporosis. This review discusses the current evidence for psychological stress-associated mental health disorders as risk factors for osteoporosis, the mechanisms that may link these conditions, and potential implications for treatment. Traditional, alternative, and adjunctive therapies are discussed. This review is not intended to provide therapeutic recommendations, but, rather, the goal of this review is to delineate potential interactions of psychological stress and osteoporosis and to highlight potential multi-system implications of pharmacological interventions. Review of the current literature identifies several potentially overlapping mechanistic pathways that may be of interest (e.g., glucocorticoid signaling, insulin-like growth factor signaling, serotonin signaling) for further basic and clinical research. Current literature also supports the potential for cross-effects of therapeutics for osteoporosis and mental health disorders. While studies examining a direct link between osteoporosis and chronic psychological stress are limited, the studies reviewed herein suggest that a multi-factorial, personalized approach should be considered for improved patient outcomes in populations experiencing psychological stress, particularly those at high-risk for development of osteoporosis.
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Affiliation(s)
- Ryan R Kelly
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, United States.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Lindsay T McDonald
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, United States.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Nathaniel R Jensen
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, United States.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Sara J Sidles
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, United States.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Amanda C LaRue
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, United States.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, United States
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Beekman KM, Veldhuis-Vlug AG, den Heijer M, Maas M, Oleksik AM, Tanck MW, Ott SM, van 't Hof RJ, Lips P, Bisschop PH, Bravenboer N. The effect of raloxifene on bone marrow adipose tissue and bone turnover in postmenopausal women with osteoporosis. Bone 2019; 118:62-68. [PMID: 29032175 DOI: 10.1016/j.bone.2017.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 10/05/2017] [Accepted: 10/09/2017] [Indexed: 10/18/2022]
Abstract
In patients with postmenopausal osteoporosis low bone volume is associated with high bone marrow adipose tissue (MAT). Moreover, high MAT is associated with increased fracture risk. This suggests an interaction between MAT and bone turnover, however literature remains equivocal. Estrogen treatment decreases MAT, but the effect of raloxifene, a selective estrogen receptor modulator (SERM) registered for treatment of postmenopausal osteoporosis, on MAT is not known. The aim of this study is 1] to determine the effect of raloxifene on MAT and 2] to determine the relationship between MAT and bone turnover in patients with osteoporosis. Bone biopsies from the MORE trial were analyzed. The MORE trial investigated the effects of raloxifene 60 or 120mg per day versus placebo on bone metabolism and fracture incidence in patients with postmenopausal osteoporosis. We quantified MAT in iliac crest biopsies obtained at baseline and after 2years of treatment (n=53; age 68.2±6.2years). Raloxifene did not affect the change in MAT volume after 2years compared to baseline (placebo: 1.89±10.84%, raloxifene 60mg: 6.31±7.22%, raloxifene 120mg: -0.77±10.72%), nor affected change in mean adipocyte size (placebo: 1.45 (4.45) μm, raloxifene 60mg: 1.45 (4.35) μm, raloxifene 120mg: 0.81 (5.21) μm). Adipocyte number tended to decrease after placebo treatment (-9.92 (42.88) cells/mm2) and tended to increase during raloxifene 60mg treatment (13.27 (66.14) cells/mm2) while adipocyte number remained unchanged in the raloxifene 120mg group, compared to placebo (3.06 (39.80) cells/mm2, Kruskal-Wallis p=0.055, post hoc: placebo vs raloxifene 60mg p=0.017). MAT volume and adipocyte size were negatively associated with osteoclast number at baseline (R2=0.123, p=0.006 and R2=0.098, p=0.016 respectively). Furthermore adipocyte size was negatively associated with osteoid surface (R2=0.067, p=0.049). Finally, patients with vertebral fractures had higher MAT volume (50.82 (8.80)%) and larger adipocytes (55.75 (3.14) μm) compared to patients without fractures (45.58 (12.72)% p=0.032, 52.77 (3.73) μm p=0.004 respectively). In conclusion, raloxifene did not affect marrow adipose tissue, but tended to increase adipocyte number compared to placebo. At baseline MAT volume and adipocyte size were associated with bone resorption, and adipocyte size was associated with osteoid surface, suggesting an interaction between bone marrow adipocytes and bone turnover. In addition, we found that high MAT volume and larger adipocyte size are associated with prevalent vertebral fractures in postmenopausal women with osteoporosis, indicating that adipocyte size affects bone quality independent of bone volume.
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Affiliation(s)
- Kerensa M Beekman
- VU University Medical Center, Department of Internal Medicine, Section of Endocrinology, PO Box 7057, 1007MB, Amsterdam, The Netherlands; Academic Medical Center/University of Amsterdam, Department of Radiology and Nuclear Medicine, PO Box 22660, 1100DD, Amsterdam, The Netherlands.
| | - Annegreet G Veldhuis-Vlug
- Academic Medical Center/University of Amsterdam, Department of Endocrinology and Metabolism, The Netherlands; Maine Medical Center Research Institute, Center for Clinical and Translational Medicine, 81 Research Drive, 04074 Scarborough, ME, USA.
| | - Martin den Heijer
- VU University Medical Center, Department of Internal Medicine, Section of Endocrinology, PO Box 7057, 1007MB, Amsterdam, The Netherlands.
| | - Mario Maas
- Academic Medical Center/University of Amsterdam, Department of Radiology and Nuclear Medicine, PO Box 22660, 1100DD, Amsterdam, The Netherlands.
| | - Ania M Oleksik
- Leiden University Medical Center, Department of Internal Medicine, Albinusdreef 2, PO Box 9600, 2300RC Leiden, The Netherlands.
| | - Michael W Tanck
- Academic Medical Center/University of Amsterdam, Department of Clinical Epidemiology, Biostatistics and Bioinformatics, The Netherlands.
| | - Susan M Ott
- University of Washington, Bone and Joint Center, Box 354740, 4245 Roosevelt Way N.E., Seattle, WA 98105-6920, USA.
| | - Rob J van 't Hof
- University of Liverpool, Institute of Ageing and Chronic Disease, 6 West Derby Street, Liverpool L7 8TX, United Kingdom.
| | - Paul Lips
- VU University Medical Center, Department of Internal Medicine, Section of Endocrinology, PO Box 7057, 1007MB, Amsterdam, The Netherlands.
| | - Peter H Bisschop
- Academic Medical Center/University of Amsterdam, Department of Radiology and Nuclear Medicine, PO Box 22660, 1100DD, Amsterdam, The Netherlands.
| | - Nathalie Bravenboer
- Leiden University Medical Center, Department of Internal Medicine, Albinusdreef 2, PO Box 9600, 2300RC Leiden, The Netherlands; VU University Medical Center, Department of Clinical Chemistry, The Netherlands.
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Bone health and evaluation of bone mineral density in patients with premature ovarian insufficiency. MENOPAUSE REVIEW 2018; 17:112-116. [PMID: 30356979 PMCID: PMC6196778 DOI: 10.5114/pm.2018.78552] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 07/27/2018] [Indexed: 01/22/2023]
Abstract
Oestrogens exert an influence on skeletal homeostasis during growth and adulthood. Regulation of osteoclasts and osteoblasts generation and apoptosis and prolongation of the lifespan of osteocytes are some of their actions on bone metabolism. Premature ovarian insufficiency (POI) and associated loss of oestrogen action on osteoclasts leads to trabecular perforation and loss of connectivity. Lack of oestrogens acting on osteoblast progenitors also causes a decrease in critical bone mass. Postmenopausal hypoestrogenism is associated with an increase in the number of lymphocyte B-cells expressing nuclear factor κB ligand (RANKL) in the bone marrow and elevated expression of RANKL by B-cells. Increased concentration of RANKL stimulates activation of osteoclasts and leads to oestrogen deficiency-associated bone loss. It has been proven that women with POI have decreased bone mineral density (BMD) measured in lumbar spine and femoral neck. The loss of bone mass associated with oestrogen deficiency is greater in trabecular than in cortical bone, thus women with POI have a significant decrease in BMD, particularly in the lumbar spine vertebrae. Smoking cessation, weight-bearing, and muscle-strengthening exercises on most days of the week, avoidance of excessive alcohol intake, and adequate supplementation of calcium and vitamin D are the main lifestyle rules necessary to avoid decline in BMD. The most important component of decreased BMD treatment in POI patients is systemic hormonal replacement therapy (HRT). HRT should provide hormonal balance and should mimic normal ovarian function as much as possible.
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Khine YM, Taniguchi F, Nagira K, Nakamura K, Ohbayashi T, Osaki M, Harada T. New insights into the efficacy of SR-16234, a selective estrogen receptor modulator, on the growth of murine endometriosis-like lesions. Am J Reprod Immunol 2018; 80:e13023. [DOI: 10.1111/aji.13023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/13/2018] [Accepted: 06/26/2018] [Indexed: 12/14/2022] Open
Affiliation(s)
- Yin Mon Khine
- Department of Obstetrics and Gynecology; Faculty of Medicine; Tottori University; Yonago Japan
| | - Fuminori Taniguchi
- Department of Obstetrics and Gynecology; Faculty of Medicine; Tottori University; Yonago Japan
| | - Kei Nagira
- Department of Obstetrics and Gynecology; Faculty of Medicine; Tottori University; Yonago Japan
| | - Kazuomi Nakamura
- Division of Laboratory Animal Science; Research Center for Bioscience and Technology; Faculty of Medicine; Tottori University; Yonago Japan
| | - Tetsuya Ohbayashi
- Division of Laboratory Animal Science; Research Center for Bioscience and Technology; Faculty of Medicine; Tottori University; Yonago Japan
| | - Mitsuhiko Osaki
- Department of Pathological Biochemistry; Faculty of Medicine; Tottori University; Yonago Japan
| | - Tasuku Harada
- Department of Obstetrics and Gynecology; Faculty of Medicine; Tottori University; Yonago Japan
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Wang Z, Li Y. Raloxifene/SBE-β-CD Inclusion Complexes Formulated into Nanoparticles with Chitosan to Overcome the Absorption Barrier for Bioavailability Enhancement. Pharmaceutics 2018; 10:pharmaceutics10030076. [PMID: 29958389 PMCID: PMC6160996 DOI: 10.3390/pharmaceutics10030076] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 06/25/2018] [Accepted: 06/25/2018] [Indexed: 11/18/2022] Open
Abstract
Raloxifene (RXF) is a hormone-like medication used for treating postmenopausal osteoporosis and estrogen-dependent breast cancer, yet associated with bad low bioavailability due to poor solubility. This study was intended to develop cyclodextrin/chitosan nanoparticles (ccNPs) for oral delivery of RXF in order to enhance the oral bioavailability. RXF-loaded ccNPs (RXF-ccNPs) were prepared by cyclodextrin inclusion followed by complexation with chitosan. RXF-ccNPs were fully characterized by particle size, morphology and in vitro drug release. The oral delivery efficacy and transepithelial transport potential were evaluated by pharmacokinetics, in situ single-pass intestinal perfusion, cellular uptake and ex vivo imaging. The resulting RXF-ccNPs were around 165 nm in particle size with a narrow distribution. The oral bioavailability of RXF was enhanced by 2.6 folds through ccNPs compared to RXF suspensions in rats. It was shown that RXF-ccNPs could improve the intestinal permeability of RXF, increase the cellular uptake of RXF and facilitate its transport across the absorptive epithelia. The results indicate that our developed ccNPs based on sulfobutylether-β-cyclodextrin and oligochitosan are a promising vehicle to orally deliver poorly water-soluble drugs over and above RXF.
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Affiliation(s)
- Zaihua Wang
- Guangzhou Guocaoxiafang Biotechnology Co. Ltd., No. 3 Luoxuan 4th Road, Guangzhou International Biotech Island, Guangzhou 510320, China.
| | - Yan Li
- Department of Pharmacy, School of Pharmacy, No. 601 West Huangpu Avenue, Jinan University, Guangzhou 510632, China.
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Khan MM. Translational Significance of Selective Estrogen Receptor Modulators in Psychiatric Disorders. Int J Endocrinol 2018; 2018:9516592. [PMID: 30402099 PMCID: PMC6196929 DOI: 10.1155/2018/9516592] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/10/2018] [Accepted: 09/02/2018] [Indexed: 12/11/2022] Open
Abstract
Accumulating data from various clinical trial studies suggests that adjuvant therapy with ovarian hormones (estrogens) could be effective in reducing cognitive deficit and psychopathological symptoms in women with psychiatric disorders. However, estrogen therapy poses serious limitations and health issues including feminization in men and increased risks of thromboembolism, hot flashes, breast hyperplasia, and endometrium hyperplasia when used for longer duration in older women (aged ≥ 60 years) or in women who have genetic predispositions. On the other hand, selective estrogen receptor modulators (SERMs), which may (or may not) carry some risks of hot flashes, thromboembolism, breast hyperplasia, and endometrial hyperplasia, are generally devoid of feminization effect. In clinical trial studies, adjuvant therapy with tamoxifen, a triphenylethylene class of SERM, has been found to reduce the frequency of manic episodes in patients with bipolar disorder, whereas addition of raloxifene, a benzothiophene class of SERM, to regular doses of antipsychotic drugs has been found to reduce cognitive deficit and psychological symptoms in men and women with schizophrenia, including women with treatment refractory psychosis. These outcomes together with potent neurocognitive, neuroprotective, and cardiometabolic properties suggest that SERMs could be the potential targets for designing effective and safer therapies for psychiatric disorders.
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Affiliation(s)
- Mohammad M. Khan
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Zawia, P.O. Box 16418, Az-Zawiyah, Libya
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Müllerian intra-abdominal carcinomatosis in hereditary breast ovarian cancer syndrome: implications for risk-reducing surgery. Fam Cancer 2017; 15:371-84. [PMID: 26875157 DOI: 10.1007/s10689-016-9878-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
More than 40 years ago Lynch et al. described several multigenerational breast cancer family pedigrees which demonstrated autosomal dominant inheritance of a trait(s) that increased risks for both breast and ovarian cancers. Mutation carriers in at least 90 % of these hereditary breast ovarian cancer (HBOC) syndrome families have been linked to cancer-associated mutations in the genes BRCA1 and BRCA2. This review focuses on the contributions of Lynch, colleagues and collaborators and pertinent literature, toward defining the HBOC syndrome, the cancer risks that the inherited adverse mutations convey, the gynecologic tissues and organs from which the malignancy may arise to disseminate throughout the pelvic and abdominal organs and peritoneum and how this information can be used to reduce the risk and morbidities of intra-abdominal carcinomatosis in effected individuals.
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Franks LN, Ford BM, Prather PL. Selective Estrogen Receptor Modulators: Cannabinoid Receptor Inverse Agonists with Differential CB1 and CB2 Selectivity. Front Pharmacol 2016; 7:503. [PMID: 28066250 PMCID: PMC5177629 DOI: 10.3389/fphar.2016.00503] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 12/07/2016] [Indexed: 12/16/2022] Open
Abstract
Selective estrogen receptor modulators (SERMs) are used to treat estrogen receptor (ER)-positive breast cancer and osteoporosis. Interestingly, tamoxifen and newer classes of SERMs also exhibit cytotoxic effects in cancers devoid of ERs, indicating a non-estrogenic mechanism of action. Indicative of a potential ER-independent target, reports demonstrate that tamoxifen binds to cannabinoid receptors (CBRs) with affinity in the low μM range and acts as an inverse agonist. To identify cannabinoids with improved pharmacological properties relative to tamoxifen, and further investigate the use of different SERM scaffolds for future cannabinoid drug development, this study characterized the affinity and activity of SERMs in newer structural classes at CBRs. Fourteen SERMs from five structurally distinct classes were screened for binding to human CBRs. Compounds from four of five SERM classes examined bound to CBRs. Subsequent studies fully characterized CBR affinity and activity of one compound from each class. Ospemifine (a triphenylethylene) selectively bound to CB1Rs, while bazedoxifine (an indole) bound to CB2Rs with highest affinity. Nafoxidine (a tetrahydronaphthalene) and raloxifene (RAL; a benzothiaphene) bound to CB1 and CB2Rs non-selectively. All four compounds acted as inverse agonists at CB1 and CB2Rs, reducing basal G-protein activity with IC50 values in the nM to low μM range. Ospemifine, bazedoxifene and RAL also acted as inverse agonists to elevate basal intracellular cAMP levels in intact CHO-hCB2 cells. The four SERMs examined also acted as CB1 and CB2R antagonists in the cAMP assay, producing rightward shifts in the concentration-effect curve of the CBR agonist CP-55,940. In conclusion, newer classes of SERMs exhibit improved pharmacological characteristics (e.g., in CBR affinity and selectivity) relative to initial studies with tamoxifen, and thus suggest that different SERM scaffolds may be useful for development of safe and selective drugs acting via CBRs.
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Affiliation(s)
- Lirit N Franks
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock AR, USA
| | - Benjamin M Ford
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock AR, USA
| | - Paul L Prather
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock AR, USA
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Khan MM. Neurocognitive, Neuroprotective, and Cardiometabolic Effects of Raloxifene: Potential for Improving Therapeutic Outcomes in Schizophrenia. CNS Drugs 2016; 30:589-601. [PMID: 27193386 DOI: 10.1007/s40263-016-0343-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Raloxifene is a selective estrogen receptor modulator that has been approved for treating osteoporosis and breast cancer in high-risk postmenopausal women. However, recent evidence suggests that raloxifene adjunct therapy improves cognition and reduces symptom severity in men and women with schizophrenia. In animal models, raloxifene increases forebrain neurogenesis and enhances working memory and synaptic plasticity. It may consequently repair the neuronal and synaptic connectivity that is disrupted in schizophrenia. It also reduces oxidative stress and neuroinflammation, which are potent etiological factors in the neuropathology of schizophrenia. Furthermore, in postmenopausal women, raloxifene reduces the risks for atherosclerosis, diabetes mellitus, and weight gain, which are serious adverse effects associated with long-term antipsychotic treatment in schizophrenia; therefore, it may improve the safety and efficacy of antipsychotic drugs. In this review, recent insights into the neurocognitive, neuroprotective, and cardiometabolic effects of raloxifene in relation to therapeutic outcomes in schizophrenia are discussed.
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Affiliation(s)
- Mohammad M Khan
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Zawia, Jamal Abdul Nassre Street, P.O. Box 16418, Az-Zawiyah, Libya.
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McKenna NJ. Research Resources for Nuclear Receptor Signaling Pathways. Mol Pharmacol 2016; 90:153-9. [PMID: 27216565 DOI: 10.1124/mol.116.103713] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 05/19/2016] [Indexed: 12/20/2022] Open
Abstract
Nuclear receptor (NR) signaling pathways impact cellular function in a broad variety of tissues in both normal physiology and disease states. The complex tissue-specific biology of these pathways is an enduring impediment to the development of clinical NR small-molecule modulators that combine therapeutically desirable effects in specific target tissues with suppression of off-target effects in other tissues. Supporting the important primary research in this area is a variety of web-based resources that assist researchers in gaining an appreciation of the molecular determinants of the pharmacology of a NR pathway in a given tissue. In this study, selected representative examples of these tools are reviewed, along with discussions on how current and future generations of tools might optimally adapt to the future of NR signaling research.
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Affiliation(s)
- Neil J McKenna
- Department of Molecular and Cellular Biology and Nuclear Receptor Signaling Atlas Bioinformatics Resource, Baylor College of Medicine, Houston, Texas
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Usall J, Huerta-Ramos E, Labad J, Cobo J, Núñez C, Creus M, Parés GG, Cuadras D, Franco J, Miquel E, Reyes JC, Roca M. Raloxifene as an Adjunctive Treatment for Postmenopausal Women With Schizophrenia: A 24-Week Double-Blind, Randomized, Parallel, Placebo-Controlled Trial. Schizophr Bull 2016; 42:309-17. [PMID: 26591005 PMCID: PMC4753610 DOI: 10.1093/schbul/sbv149] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
UNLABELLED The potential therapeutic utility of estrogens in schizophrenia is increasingly being recognized. Raloxifene, a selective estrogen receptor modulator, appears to act similarly to estrogens on dopamine and serotonin brain systems. One previous trial by our team found that raloxifene was useful to improve negative, positive, and general psychopathological symptoms, without having the negative side effects of estrogens. In this study, we assess the utility of raloxifene in treating negative and other psychotic symptoms in postmenopausal women with schizophrenia exhibiting prominent negative symptoms. This was a 24-week, randomized, parallel, double-blind, placebo-controlled study. Patients were recruited from the inpatient and outpatient departments of Parc Sanitari Sant Joan de Déu, Hospital Universitari Institut Pere Mata, and Corporació Sanitària Parc Taulí. Seventy postmenopausal women with schizophrenia (DSM-IV) were randomized to either adjunctive raloxifene (38 women) or adjunctive placebo (32 women). Psychopathological symptoms were assessed at baseline and at weeks 4, 12, and 24 with the Positive and Negative Syndrome Scale (PANSS) and the Scale for the Assessment of Negative Symptoms (SANS). The addition of raloxifene (60 mg/d) to regular antipsychotic treatment significantly reduced negative (P = .027), general (P = .003), and total symptomatology (P = .005) measured with the PANSS during the 24-week trial, as compared to women receiving placebo. Also Alogia SANSS subscale improved more in the raloxifene (P = .048) than the placebo group. In conclusion, raloxifene improved negative and general psychopathological symptoms, compared with antipsychotic medication alone, in postmenopausal women with schizophrenia. These data replicate our previous results with a larger sample and a longer follow-up. TRIAL REGISTRATION NCT01573637.
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Affiliation(s)
| | | | | | - Jesús Cobo
- Catalan Group in Women’s Mental Health Research (GTRDSM), Barcelona, Spain;,Corporació Sanitària i Universitària Parc Taulí, Psychiatry Department, Sabadell, Spain
| | - Christian Núñez
- Parc Sanitari Sant Joan de Déu, Research and Development Unit, Sant Boi de Llobregat, Spain
| | - Marta Creus
- Hospital Universitari Institut Pere Mata, IISPV, Universitat Rovira i Virgili, Psychiatry Department, Reus, Spain
| | - Gemma García Parés
- Catalan Group in Women’s Mental Health Research (GTRDSM), Barcelona, Spain;,Corporació Sanitària i Universitària Parc Taulí, Psychiatry Department, Sabadell, Spain;,CAP EAE SALUT MENTAL, Andorra
| | - Daniel Cuadras
- Parc Sanitari Sant Joan de Déu, Research and Development Unit, Sant Boi de Llobregat, Spain
| | - José Franco
- Instituto de Salud Carlos III, Centro de Investigación en Red de Salud Mental (CIBERSAM), Madrid, Spain;,Hospital Universitari Institut Pere Mata, IISPV, Universitat Rovira i Virgili, Psychiatry Department, Reus, Spain
| | - Eva Miquel
- Parc Sanitari Sant Joan de Déu, Research and Development Unit, Sant Boi de Llobregat, Spain
| | - Julio César Reyes
- Instituto de Salud Carlos III, Centro de Investigación en Red de Salud Mental (CIBERSAM), Madrid, Spain;,Hospital Universitari Institut Pere Mata, IISPV, Universitat Rovira i Virgili, Psychiatry Department, Reus, Spain
| | - Mercedes Roca
- Parc Sanitari Sant Joan de Déu, Research and Development Unit, Sant Boi de Llobregat, Spain
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Bivi N, Hu H, Chavali B, Chalmers MJ, Reutter CT, Durst GL, Riley A, Sato M, Allen MR, Burr DB, Dodge JA. Structural features underlying raloxifene's biophysical interaction with bone matrix. Bioorg Med Chem 2015; 24:759-67. [PMID: 26795112 DOI: 10.1016/j.bmc.2015.12.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 12/18/2015] [Accepted: 12/28/2015] [Indexed: 12/29/2022]
Abstract
Raloxifene, a selective estrogen receptor modulator (SERM), reduces fracture risk at least in part by improving the mechanical properties of bone in a cell- and estrogen receptor-independent manner. In this study, we determined that raloxifene directly interacts with the bone tissue. Through the use of multiple and complementary biophysical techniques including nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR), we show that raloxifene interacts specifically with the organic component or the organic/mineral composite, and not with hydroxyapatite. Structure-activity studies reveal that the basic side chain of raloxifene is an instrumental determinant in the interaction with bone. Thus, truncation of portions of the side chain reduces bone binding and also diminishes the increase in mechanical properties. Our results support a model wherein the piperidine interacts with bone matrix through electrostatic interactions with the piperidine nitrogen and through hydrophobic interactions (van der Waals) with the aliphatic groups in the side chain and the benzothiophene core. Furthermore, in silico prediction of the potential binding sites on the surface of collagen revealed the presence of a groove with sufficient space to accommodate raloxifene analogs. The hydroxyl groups on the benzothiophene nucleus, which are necessary for binding of SERMs to the estrogen receptor, are not required for binding to the bone surface, but mediate a more robust binding of the compound to the bone powder. In conclusion, we report herein a novel property of raloxifene analogs that allows them to interact with the bone tissue through potential contacts with the organic matrix and in particular collagen.
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Affiliation(s)
- Nicoletta Bivi
- Lilly Research Laboratories, Indianapolis, IN, United States
| | - Haitao Hu
- Lilly Research Laboratories, Indianapolis, IN, United States
| | | | | | | | - Gregory L Durst
- Lilly Research Laboratories, Indianapolis, IN, United States
| | - Anna Riley
- Lilly Research Laboratories, Indianapolis, IN, United States
| | - Masahiko Sato
- Indiana University Purdue University Indianapolis, Indianapolis, IN, United States
| | - Matthew R Allen
- Indiana University Purdue University Indianapolis, Indianapolis, IN, United States
| | - David B Burr
- Indiana University Purdue University Indianapolis, Indianapolis, IN, United States
| | - Jeffrey A Dodge
- Lilly Research Laboratories, Indianapolis, IN, United States
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Coexistence of adenomyosis and endometrioid endometrial cancer: Role in surgical guidance and prognosis estimation. Oncol Lett 2015; 11:1213-1219. [PMID: 26893721 DOI: 10.3892/ol.2015.4032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 07/07/2015] [Indexed: 11/05/2022] Open
Abstract
The aim of the current study was to diagnose the concomitant presence of adenomyosis (AM) in endometrioid endometrial cancer (EEC) in order to evaluate its value as an oncological prognostic marker. A retrospective analysis of 289 patients diagnosed with EEC who underwent total hysterectomy, bilateral salpingo-oophorectomy and pelvic-lymphadenectomy was conducted. The total cohort included 37 patients in Group A (those with concomitant AM and EEC) and 252 patients in Group B (those affected only by EEC). The following factors were evaluated: Presence or absence of AM, tumor grade, depth of myometrial invasion, tumor size, lymphovascular space involvement, lymph node status, peritoneal cytology, concomitant detection of endometrial atypical-hyperplasia or polypoid endometrial features and tumor stage according to the International Federation of Gynecology and Obstetrics (FIGO) classification. Uterine examination of different sections of uterine cervix, corpus, myomas and cervical or endometrial polyps was performed. The diagnosis of AM was confirmed when the distance between the lower border of the endometrium and the foci of the endometrial glands and stroma was >2.5 mm. Parametric and nonparametric statistical tests were performed when possible; continuous variables were analyzed using a Student's t-test, and categorical variables were analyzed by the χ2 test or Fisher's exact test. The association between FIGO stage and group was determined to be significant: 83.8% of Group A patients were categorized as FIGO stage I, vs. 68.7% of Group B patients. In addition, Group A was associated with lower grades in FIGO stage, myometrial invasion, lymphovascular space involvement, lymph node involvement and tumor size. The findings suggest that the intraoperative evaluation of the presence of AM in patients with EEC may aid surgeons in estimating oncological risk and in selecting the most appropriate surgical treatment.
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Zhou X, Wang S, Sun H, Wu B. Sulfonation of raloxifene in HEK293 cells overexpressing SULT1A3: Involvement of breast cancer resistance protein (BCRP/ABCG2) and multidrug resistance-associated protein 4 (MRP4/ABCC4) in excretion of sulfate metabolites. Drug Metab Pharmacokinet 2015; 30:425-33. [DOI: 10.1016/j.dmpk.2015.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/07/2015] [Accepted: 09/29/2015] [Indexed: 11/16/2022]
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Down-regulation of osteopontin mediates a novel mechanism underlying the cytostatic activity of TGF-β. Cell Oncol (Dordr) 2015; 39:119-28. [PMID: 26584547 DOI: 10.1007/s13402-015-0257-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2015] [Indexed: 12/19/2022] Open
Abstract
PURPOSE Loss of a cytostatic response to TGF-β has been implicated in multiple hyper-proliferative disorders, including cancer. Although several key genes involved in the cytostatic activity of TGF-β have in the past been identified, its exact mode of action is yet to be elucidated. A comprehensive understanding of the mechanisms underlying the cytostatic activity of TGF-β may open up new avenues for the development of therapeutic strategies. METHODS Quantitative real-time RT-PCR was used to assess osteopontin (OPN) gene expression in human hepatoma-derived Huh-7 and lung adenocarcinoma-derived A549 cells. Reporter assays using an OPN promoter-luciferase construct and its mutated counterparts were performed to assess its transcriptional activity. Binding of Smad4 to the OPN gene promoter was investigated using chromatin immunoprecipitation (CHIP). The putative role of Smad4 in OPN gene expression down-regulation was also assessed using a shRNA-mediated knockdown strategy. The anti-proliferative effect of TGF-β on different cancer-derived cell lines was determined using the cell proliferation reagent WST-1. RESULTS We found that the OPN expression levels dose-dependently decreased in TGF-β-treated Huh-7 and A549 cells. Our reporter assays indicated that this TGF-β-induced repression occurred at the transcriptional level, and could largely be abrogated by disruption of an element (TIE2) similar to the TGF-β inhibitory element found in other TGF-β-repressed genes. Our CHIP assay revealed that the Smad protein complex specifically binds to the OPN gene promoter, and that the TGF-β-mediated inhibition of OPN was lost upon shRNA-mediated knockdown of Smad4. Moreover, we found that the deregulation of OPN gene expression by TGF-β occurred concomitantly with loss of the TGF-β anti-proliferative response, whereas a neutralizing anti-OPN antibody partially restored this response. CONCLUSIONS Our results indicate that the OPN gene is a direct target of Smad-mediated TGF-β signaling, implying that OPN expression inhibition serves as a novel mechanism underlying the cytostatic activity of TGF-β.
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Sex hormones and oxytocin augmentation strategies in schizophrenia: A quantitative review. Schizophr Res 2015; 168:603-13. [PMID: 25914107 DOI: 10.1016/j.schres.2015.04.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 03/05/2015] [Accepted: 04/01/2015] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Sex differences in incidence, onset and course of schizophrenia suggest sex hormones play a protective role in the pathophysiology. Such a role is also proposed for oxytocin, another important regulator of reproduction function. Evidence on the efficacy of sex hormones and oxytocin in the treatment of schizophrenia is summarized. METHODS Double-blind, placebo-controlled, randomized studies were included, examining augmentation with estrogens, selective estrogen receptor modulators (SERMs), testosterone, dehydroepiandrosterone (DHEA), pregnenolone, and oxytocin. Outcome measures were total symptom severity, positive and negative symptom subscores, and cognition. In meta-analyses, combined weighted effect sizes (Hedges' g) per hormone were calculated. RESULTS Twenty-four studies were included, examining 1149 patients. Significant effects were found for estrogen action (k=10), regarding total symptoms (Hedges' g=0.63, p=0.001), positive (Hedges' g=0.42, p<0.001), and negative symptoms (Hedges' g=0.35, p=0.001). Subgroup analyses yielded significant results for estrogens in premenopausal women (k=6) for total, positive, and negative symptoms, and for the SERM raloxifene in postmenopausal women (k=3) for total and negative, but not positive symptoms. Testosterone augmentation in males (k=1) was beneficial only for negative symptoms (Hedges' g=0.82, p=0.027). No overall effects were found for DHEA (k=4), pregnenolone (k=4), and oxytocin (k=6). Results for cognition (k=12) were too diverse for meta-analyses, and inspection of these data showed no consistent benefit. CONCLUSIONS Estrogens and SERMs could be effective augmentation strategies in the treatment of women with schizophrenia, although potential side effects, partially associated with longer duration use, should be taken into account. Future trials are needed to study long-term effects and effects on cognition.
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Han SJ, Begum K, Foulds CE, Hamilton RA, Bailey S, Malovannaya A, Chan D, Qin J, O'Malley BW. The Dual Estrogen Receptor α Inhibitory Effects of the Tissue-Selective Estrogen Complex for Endometrial and Breast Safety. Mol Pharmacol 2015; 89:14-26. [PMID: 26487511 DOI: 10.1124/mol.115.100925] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/13/2015] [Indexed: 12/14/2022] Open
Abstract
The conjugated estrogen /: bazedoxifene tissue-selective estrogen complex (TSEC) is designed to minimize the undesirable effects of estrogen in the uterus and breast tissues and to allow the beneficial effects of estrogen in other estrogen-target tissues, such as the bone and brain. However, the molecular mechanism underlying endometrial and breast safety during TSEC use is not fully understood. Estrogen receptor α (ERα)-estrogen response element (ERE)-DNA pull-down assays using HeLa nuclear extracts followed by mass spectrometry-immunoblotting analyses revealed that, upon TSEC treatment, ERα interacted with transcriptional repressors rather than coactivators. Therefore, the TSEC-mediated recruitment of transcriptional repressors suppresses ERα-mediated transcription in the breast and uterus. In addition, TSEC treatment also degraded ERα protein in uterine tissue and breast cancer cells, but not in bone cells. Interestingly, ERα-ERE-DNA pull-down assays also revealed that, upon TSEC treatment, ERα interacted with the F-box protein 45 (FBXO45) E3 ubiquitin ligase. The loss-of- and gain-of-FBXO45 function analyses indicated that FBXO45 is involved in TSEC-mediated degradation of the ERα protein in endometrial and breast cells. In preclinical studies, these synergistic effects of TSEC on ERα inhibition also suppressed the estrogen-dependent progression of endometriosis. Therefore, the endometrial and breast safety effects of TSEC are associated with synergy between the selective recruitment of transcriptional repressors to ERα and FBXO45-mediated degradation of the ERα protein.
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Affiliation(s)
- Sang Jun Han
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Khurshida Begum
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Charles E Foulds
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Ross A Hamilton
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Suzanna Bailey
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Anna Malovannaya
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Doug Chan
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Jun Qin
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
| | - Bert W O'Malley
- Department of Molecular and Cellular Biology (S.J.H., K.B., C.E.F., R.A.H, S.B., A.M., D.C., J.Q., B.W.O.), And Center for Molecular Discovery, Verna and Marrs McLean, Department of Biochemistry and Molecular Biology (A.M., D.C., J.Q.), Baylor College of Medicine, Houston, Texas
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Warkus ELL, Yuen AAYQ, Lau CGY, Marikawa Y. Use ofIn VitroMorphogenesis of Mouse Embryoid Bodies to Assess Developmental Toxicity of Therapeutic Drugs Contraindicated in Pregnancy. Toxicol Sci 2015; 149:15-30. [DOI: 10.1093/toxsci/kfv209] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kishi N, Takasuka A, Kokawa Y, Isobe T, Taguchi M, Shigeyama M, Murata M, Suno M, Hanioka N. Raloxifene glucuronidation in liver and intestinal microsomes of humans and monkeys: contribution of UGT1A1, UGT1A8 and UGT1A9. Xenobiotica 2015; 46:289-95. [PMID: 26247833 DOI: 10.3109/00498254.2015.1074301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. Raloxifene is an antiestrogen that has been marketed for the treatment of osteoporosis, and is metabolized into 6- and 4'-glucuronides by UDP-glucuronosyltransferase (UGT) enzymes. In this study, the in vitro glucuronidation of raloxifene in humans and monkeys was examined using liver and intestinal microsomes and recombinant UGT enzymes (UGT1A1, UGT1A8 and UGT1A9). 2. Although the K(m) and CL(int) values for the 6-glucuronidation of liver and intestinal microsomes were similar between humans and monkeys, and species differences in Vmax values (liver microsomes, humans > monkeys; intestinal microsomes, humans < monkeys) were observed, no significant differences were noted in the K(m) or S50, Vmax and CL(int) or CLmax values for the 4'-glucuronidation of liver and intestinal microsomes between humans and monkeys. 3. The activities of 6-glucuronidation in recombinant UGT enzymes were UGT1A1 > UGT1A8 >UGT1A9 for humans, and UGT1A8 > UGT1A1 > UGT1A9 for monkeys. The activities of 4'-glucuronidation were UGT1A8 > UGT1A1 > UGT1A9 in humans and monkeys. 4. These results demonstrated that the profiles for the hepatic and intestinal glucuronidation of raloxifene by microsomes were moderately different between humans and monkeys.
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Affiliation(s)
- Naoki Kishi
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | - Akane Takasuka
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | - Yuki Kokawa
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | | | - Maho Taguchi
- c Department of Clinical Pharmacy , Yokohama University of Pharmacy , Yokohama , Japan
| | - Masato Shigeyama
- c Department of Clinical Pharmacy , Yokohama University of Pharmacy , Yokohama , Japan
| | - Mikio Murata
- c Department of Clinical Pharmacy , Yokohama University of Pharmacy , Yokohama , Japan
| | - Manabu Suno
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
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Levonorgestrel Inhibits Human Endometrial Cell Proliferation through the Upregulation of Gap Junctional Intercellular Communication via the Nuclear Translocation of Ser255 Phosphorylated Cx43. BIOMED RESEARCH INTERNATIONAL 2015; 2015:758684. [PMID: 26161412 PMCID: PMC4486311 DOI: 10.1155/2015/758684] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 09/27/2014] [Accepted: 09/28/2014] [Indexed: 11/17/2022]
Abstract
Objects. To assess whether LNG exerts antiproliferation effects on human endometrial cells through changes of GJIC function and the phosphorylated Cx43. Methods. Cell proliferation and apoptosis of human endometrial stromal cells (HESCs) and glandular cells (HEGCs) treated with LNG in a dose- and time-dependent manner. GJIC change and further total Cx43 and serine 368 and 255 phosphorylated Cx43 were measured. Results. 5 × 10−5 mol/L LNG revealed a time-dependent inhibition of cell proliferation and an increase of apoptosis in both HESCs and HEGCs. Furthermore, these cells demonstrated a significant GJIC enhancement upon treatment with 5 × 10−5 mol/L for 48 hours. The effects of LNG were most noticeable in HESCs rather than in HEGCs. Associated with these changes, LNG induced a relative increase in total Cx43 in a time-dependent manner but not Ser368 phosphorylated Cx43. Moreover, laser scanning confocal microscope confirmed the increased expression of total Cx43 in the cytoplasm and, interestingly, the nuclear translocation of Ser255 phosphorylated Cx43. Conclusions. LNG likely inhibits the proliferation and promotes apoptosis in HESCs and HEGCs though an increase in gap junction permeability in vitro, which is achieved through the upregulation of Cx43 expression and the translocation of serine 255 phosphorylated Cx43 from the plasma to the nuclear compartment.
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Vitagliano A, Noventa M, Quaranta M, Gizzo S. Statins as Targeted "Magical Pills" for the Conservative Treatment of Endometriosis: May Potential Adverse Effects on Female Fertility Represent the "Dark Side of the Same Coin"? A Systematic Review of Literature. Reprod Sci 2015; 23:415-28. [PMID: 25929256 DOI: 10.1177/1933719115584446] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The aim of the study was to analyze all the available evidence from both in vitro and in vivo studies regarding the efficacy of statin therapy in the treatment of endometriosis, evaluating the potential efficacy, side effects, and contraindications of their administration in humans. We focused on defining the potential benefits that the administration of statins may have on patients affected by endometriosis and the possible adverse effects of such a therapy on ovarian function and fertility profile. According to our article selection criteria, we included in the review in vitro and in vivo studies performed on human or animal models. The systematic review of literature identified 24 eligible articles, 12 of which reported evidence regarding the effects of statins on endometrial/endometriotic cells and 12 regarding their effects on ovarian function and fertility. All articles seem to emphasize the utility of statin administration in the treatment of endometriosis due to their anti-proliferative/proapoptotic effects, their ability to reduce cell viability and migration, and the inhibition of angiogenesis and anti-inflammatory activities. Regarding the potential adverse effects on gonadal activities, steroidogenesis and fertility function, no conclusive data were collected in human models (excluding women affected by polycystic ovary syndrome in which significant decline of androgen levels was reported after statin treatment), while contrasting results were reported by studies conducted in in vitro and in vivo in animal models. Despite evidence supporting statins as the potential therapeutic agent for a targeted conservative treatment of endometriosis, the uncertainties regarding their impact on gonadal function may not define them as an appropriate therapy for all young fertile women.
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Affiliation(s)
| | - Marco Noventa
- Department of Woman and Child Health, University of Padua, Padua, Italy
| | - Michela Quaranta
- Department of Obstetrics and Gynaecology, University of Verona, Verona, Italy
| | - Salvatore Gizzo
- Department of Woman and Child Health, University of Padua, Padua, Italy
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Lamas AZ, Caliman IF, Dalpiaz PLM, de Melo AF, Abreu GR, Lemos EM, Gouvea SA, Bissoli NS. Comparative effects of estrogen, raloxifene and tamoxifen on endothelial dysfunction, inflammatory markers and oxidative stress in ovariectomized rats. Life Sci 2015; 124:101-9. [PMID: 25623855 DOI: 10.1016/j.lfs.2015.01.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 12/15/2014] [Accepted: 01/08/2015] [Indexed: 12/24/2022]
Abstract
AIM Endothelial dysfunction is considered a premature indication of atherosclerosis and vessel damage and is present in the postmenopausal period. This study compares the influence of estrogen, raloxifene and tamoxifen on factors that affect endothelial function in ovariectomized (OVX) rats. MAIN METHODS The rats were divided into: SHAM; OVX; OVX+estrogen (0.5 μg/kg/day); OVX+raloxifene (2 mg/kg/day) and OVX+tamoxifen (1 mg/kg/day) groups. The acetylcholine vasorelaxation response was evaluated in the mesenteric vascular bed. The vascular oxidative stress and serum inflammatory cytokine levels were monitored, and analyses of eNOS and iNOS were performed. KEY FINDINGS The acetylcholine-induced responses obtained in the OVX were lower than those obtained in the SHAM, and all treatments restored this response. l-NAME reduced and equalized the acetylcholine-induced response in all groups. The attenuation of the acetylcholine-induced responses by aminoguanidine was greater in the OVX. Endothelial dysfunction in OVX was associated with oxidative stress and an increase in iNOS and decrease in eNOS expression. Except for the production of reactive oxidative species (ROS) in the OVX+tamoxifen, treatments improved the nitric oxide component of the relaxation response and normalized both the oxidative stress and the expression of those signaling pathway enzymes. Serum levels of TNF-α and IL-6 were increased in OVX, and treatments normalized these levels. SIGNIFICANCE Raloxifene and tamoxifen have similar anti-inflammatory effects that may be important in improving vascular dysfunction. Tamoxifen did not affect the ROS but improved endothelial dysfunction. The protective effect on endothelial function by these treatments provides evidence of their potential cardiovascular benefits in the postmenopausal period.
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Affiliation(s)
- Aline Zandonadi Lamas
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Izabela Facco Caliman
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Polyana Lima Meireles Dalpiaz
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Antônio Ferreira de Melo
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Glaucia Rodrigues Abreu
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Elenice Moreira Lemos
- Nucleus of Infectious Diseases, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Sonia Alves Gouvea
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Nazaré Souza Bissoli
- Department of Physiological Sciences, Center for Health Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil.
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Kim DE, Kim Y, Cho DH, Jeong SY, Kim SB, Suh N, Lee JS, Choi EK, Koh JY, Hwang JJ, Kim CS. Raloxifene induces autophagy-dependent cell death in breast cancer cells via the activation of AMP-activated protein kinase. Mol Cells 2014; 38:138-44. [PMID: 25537862 PMCID: PMC4332026 DOI: 10.14348/molcells.2015.2193] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 10/30/2014] [Accepted: 11/10/2014] [Indexed: 11/27/2022] Open
Abstract
Raloxifene is a selective estrogen receptor modulator (SERM) that binds to the estrogen receptor (ER), and exhibits potent anti-tumor and autophagy-inducing effects in breast cancer cells. However, the mechanism of raloxifene-induced cell death and autophagy is not well-established. So, we analyzed mechanism underlying death and autophagy induced by raloxifene in MCF-7 breast cancer cells. Treatment with raloxifene significantly induced death in MCF-7 cells. Raloxifene accumulated GFP-LC3 puncta and increased the level of autophagic marker proteins, such as LC3-II, BECN1, and ATG12-ATG5 conjugates, indicating activated autophagy. Raloxifene also increased autophagic flux indicators, the cleavage of GFP from GFP-LC3 and only red fluorescence-positive puncta in mRFP-GFP-LC3-expressing cells. An autophagy inhibitor, 3-methyladenine (3-MA), suppressed the level of LC3-II and blocked the formation of GFP-LC3 puncta. Moreover, siRNA targeting BECN1 markedly reversed cell death and the level of LC3-II increased by raloxifene. Besides, raloxifene-induced cell death was not related to cleavage of caspases-7, -9, and PARP. These results indicate that raloxifene activates autophagy-dependent cell death but not apoptosis. Interestingly, raloxifene decreased the level of intracellular adenosine triphosphate (ATP) and activated the AMPK/ULK1 pathway. However it was not suppressed the AKT/mTOR pathway. Addition of ATP decreased the phosphorylation of AMPK as well as the accumulation of LC3-II, finally attenuating raloxifene-induced cell death. Our current study demonstrates that raloxifene induces autophagy via the activation of AMPK by sensing decreases in ATP, and that the overactivation of autophagy promotes cell death and thereby mediates the anti-cancer effects of raloxifene in breast cancer cells.
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Affiliation(s)
- Dong Eun Kim
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Yunha Kim
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Dong-Hyung Cho
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin 446-701, Korea
| | - Seong-Yun Jeong
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Sung-Bae Kim
- Department of Oncology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Nayoung Suh
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
- Department of Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Jung Shin Lee
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
- Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Eun Kyung Choi
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
- Department of Radiation Oncology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Jae-Young Koh
- Neural Injury Research Center and Department of Neurology, Asan Medical Center, Seoul, Korea
| | - Jung Jin Hwang
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
| | - Choung-Soo Kim
- Institute for Innovative Cancer Research, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea
- Department of Urology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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48
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Alvarez P, Bogen O, Levine JD. Role of nociceptor estrogen receptor GPR30 in a rat model of endometriosis pain. Pain 2014; 155:2680-2686. [PMID: 25280432 DOI: 10.1016/j.pain.2014.09.035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 09/23/2014] [Accepted: 09/25/2014] [Indexed: 12/16/2022]
Abstract
Endometriosis, the most common cause of chronic pelvic pain, is an estrogen-dependent disease in which classic estrogen receptors (ERα, ERβ) play an important role. Although recent evidence suggests that the novel G protein-coupled estrogen receptor (GPR30) also plays a key role in the progression of endometriosis, whether it is also involved in endometriosis pain is still unknown. Here we tested the hypothesis that GPR30 expressed by nociceptors contributes to endometriosis pain. Intramuscular injection of the GPR30 agonists raloxifene or 17β-estradiol produced a fast-onset, persistent, mechanical hyperalgesia at the site of the injection. Intrathecal antisense (AS) oligodeoxynucleotides (ODN), but not mismatch (MM) ODN, targeting mRNA for GPR30 markedly inhibited its protein expression in nociceptors and attenuated the mechanical hyperalgesia induced by local raloxifene or 17β-estradiol. Pretreatment with the GPR30 antagonist G-36 also inhibited the hyperalgesia induced by raloxifene or 17β-estradiol in naive control rats. Surgical implant of autologous uterine tissue onto the gastrocnemius muscle, which induces endometriosis-like lesions, produced local mechanical hyperalgesia. Intrathecal AS, but not MM, ODN targeting GPR30 mRNA reversibly inhibited the mechanical hyperalgesia at the site of endometriotic lesions. Finally, intralesional injection of the GPR30 antagonist G-36 also inhibited the mechanical hyperalgesia at the site of ectopic uterine tissue. We conclude that local GPR30 agonists produce persistent mechanical hyperalgesia in naive female rats, whereas local GPR30 antagonists inhibit mechanical hyperalgesia in a model of endometriosis pain. Thus, GPR30 expressed by nociceptors innervating ectopic uterine lesions might play a major role in endometriosis pain.
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Affiliation(s)
- Pedro Alvarez
- Department of Oral and Maxillofacial Surgery, University of California San Francisco, San Francisco, CA, USA Division of Neuroscience, University of California San Francisco, San Francisco, CA, USA Department of Medicine, University of California San Francisco, San Francisco, CA, USA
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Van Pelt RE, Gozansky WS, Wolfe P, Kittelson JM, Jankowski CM, Schwartz RS, Kohrt WM. Estrogen or raloxifene during postmenopausal weight loss: adiposity and cardiometabolic outcomes. Obesity (Silver Spring) 2014; 22:1024-31. [PMID: 24311443 PMCID: PMC3968229 DOI: 10.1002/oby.20653] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 10/16/2013] [Accepted: 10/18/2013] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Estrogen-based hormone therapy (HT) attenuates abdominal fat gain after menopause, but whether HT improves abdominal fat loss during weight loss is unknown. It was hypothesized that HT or a selective estrogen receptor modulator (raloxifene) would augment reductions in abdominal visceral fat during weight loss when compared to placebo, potentially increasing improvements in glucose tolerance and lipid profile. METHODS Healthy postmenopausal women (n = 119; age 50-70 yr) underwent a 6-month weight-loss (primarily exercise) intervention with randomization to raloxifene (60 mg/d), HT (conjugated estrogens, 0.625 mg/d), or placebo. Outcomes were change in total and abdominal (visceral and subcutaneous) fat mass, lipid profile, and fasting and post-challenge glucose and insulin. RESULTS Neither HT nor raloxifene augmented loss of total or abdominal fat mass during exercise-induced weight loss when compared with placebo. Weight loss-induced improvements in risk factors were similar among the three groups, except for a greater reduction in fasted glucose in the HT group (difference in change [95%CI] from placebo; -0.40 [-0.76, -0.05]) and greater reductions in LDL (-0.36 [-0.63, -0.09]) and increases in HDL (0.15 [0.07, 0.24]) in both treatment groups. CONCLUSIONS Postmenopausal HT and raloxifene did not increase abdominal fat loss during weight loss, but did improve some cardiometabolic outcomes.
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Affiliation(s)
- R E Van Pelt
- Division of Geriatric Medicine Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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Ghorab MM, El-Gazzar MG, Alsaid MS. Synthesis and anti-breast cancer evaluation of novel N-(guanidinyl)benzenesulfonamides. Int J Mol Sci 2014; 15:5582-95. [PMID: 24694543 PMCID: PMC4013583 DOI: 10.3390/ijms15045582] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 03/19/2014] [Accepted: 03/20/2014] [Indexed: 11/18/2022] Open
Abstract
A series of 4-(substituted)-N-(guanidinyl)benzenesulfonamides bearing biologically active pyrazole, pyrimidine and pyridine moieties were prepared and evaluated for their anticancer activity against human tumor breast cell line (MCF7). These sulfonamides showed promising activity with IC50 values ranging from 49.5 to 70.2 μM. The structure-activity relationship of the synthesized compounds was studied. Interestingly, it was found that the most potent compounds in this study were the corresponding 2-cyanoacrylate 3, 3-oxobutanoate 4, pyrazole 6, pyridine 9 and pyrazole 13. Compounds 7 and 8 are nearly as active as Doxorubicin as reference drug with (IC50 values=70.2, 68.1 μM), while compounds 5, 10 and 11 exhibited a moderate activity.
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Affiliation(s)
- Mostafa M Ghorab
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
| | - Marwa G El-Gazzar
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Nasr City, Cairo 11371, Egypt.
| | - Mansour S Alsaid
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
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