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Kagan R, Simon JA, Goldstein SR, Komm BS, Jenkins SN, Portman DJ. Oral lasofoxifene's effects on moderate to severe vaginal atrophy in postmenopausal women: two phase 3, randomized, controlled trials. Menopause 2024; 31:494-504. [PMID: 38652875 DOI: 10.1097/gme.0000000000002355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
OBJECTIVE The aim of this study was to demonstrate whether lasofoxifene improves vaginal signs/symptoms of genitourinary syndrome of menopause. METHODS Two identical, phase 3 trials randomized postmenopausal women with moderate to severe vaginal symptoms to oral lasofoxifene 0.25 or 0.5 mg/d, or placebo, for 12 week. Changes from baseline to week 12 in most bothersome symptom, vaginal pH, and percentages of vaginal parabasal and superficial cells were evaluated. These coprimary endpoints were analyzed using analysis of covariance, except superficial cells, which were analyzed by the nonparametric, rank-based Kruskal-Wallis test. RESULTS The two studies enrolled 444 and 445 women (mean age, ~60 y), respectively. Coprimary endpoints at week 12 improved with lasofoxifene 0.25 and 0.5 mg/d greater than with placebo ( P < 0.0125 for all). Study 1: most bothersome symptom (least square mean difference from placebo: -0.4 and -0.5 for 0.25 and 0.5 mg/d, respectively), vaginal pH (-0.65, -0.58), and vaginal superficial (5.2%, 5.4%), and parabasal (-39.9%, -34.9%) cells; study 2: most bothersome symptom (-0.4, -0.5), vaginal pH (-0.57, -0.67), and vaginal superficial (3.5%, 2.2%) and parabasal (-34.1%, -33.5%) cells. Some improvements occurred as early as week 2. Most treatment-emergent adverse events were mild or moderate and hot flushes were most frequently reported (lasofoxifene vs placebo: 13%-23% vs 9%-11%). Serious adverse events were infrequent and no deaths occurred. CONCLUSIONS In two phase 3 trials, oral lasofoxifene 0.25 and 0.5 mg/d provided significant and clinically meaningful improvements in vaginal signs/symptoms with a favorable safety profile, suggesting beneficial effects of lasofoxifene on genitourinary syndrome of menopause.
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Affiliation(s)
- Risa Kagan
- From the University of California, San Francisco and Sutter East Bay Medical Foundation, Berkeley, CA
| | - James A Simon
- George Washington University, School of Medicine; IntimMedicine Specialists, Washington, DC
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Pan M, Luo M, Liu L, Chen Y, Cheng Z, Wang K, Huang L, Tang N, Qiu J, Huang A, Xia J. EGR1 suppresses HCC growth and aerobic glycolysis by transcriptionally downregulating PFKL. J Exp Clin Cancer Res 2024; 43:35. [PMID: 38287371 PMCID: PMC10823730 DOI: 10.1186/s13046-024-02957-5] [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: 09/29/2023] [Accepted: 01/14/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND Hepatocellular Carcinoma (HCC) is a matter of great global public health importance; however, its current therapeutic effectiveness is deemed inadequate, and the range of therapeutic targets is limited. The aim of this study was to identify early growth response 1 (EGR1) as a transcription factor target in HCC and to explore its role and assess the potential of gene therapy utilizing EGR1 for the management of HCC. METHODS In this study, both in vitro and in vivo assays were employed to examine the impact of EGR1 on the growth of HCC. The mouse HCC model and human organoid assay were utilized to assess the potential of EGR1 as a gene therapy for HCC. Additionally, the molecular mechanism underlying the regulation of gene expression and the suppression of HCC growth by EGR1 was investigated. RESULTS The results of our investigation revealed a notable decrease in the expression of EGR1 in HCC. The decrease in EGR1 expression promoted the multiplication of HCC cells and the growth of xenografted tumors. On the other hand, the excessive expression of EGR1 hindered the proliferation of HCC cells and repressed the development of xenografted tumors. Furthermore, the efficacy of EGR1 gene therapy was validated using in vivo mouse HCC models and in vitro human hepatoma organoid models, thereby providing additional substantiation for the anti-cancer role of EGR1 in HCC. The mechanistic analysis demonstrated that EGR1 interacted with the promoter region of phosphofructokinase-1, liver type (PFKL), leading to the repression of PFKL gene expression and consequent inhibition of PFKL-mediated aerobic glycolysis. Moreover, the sensitivity of HCC cells and xenografted tumors to sorafenib was found to be increased by EGR1. CONCLUSION Our findings suggest that EGR1 possesses therapeutic potential as a tumor suppressor gene in HCC, and that EGR1 gene therapy may offer benefits for HCC patients.
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Affiliation(s)
- Mingang Pan
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Muyu Luo
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Lele Liu
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Yunmeng Chen
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Ziyi Cheng
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Kai Wang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Luyi Huang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Ni Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China
| | - Jianguo Qiu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China.
| | - Ailong Huang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China.
| | - Jie Xia
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing Medical University, Chongqing, 400016, China.
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Mu E, Gurvich C, Kulkarni J. Estrogen and psychosis - a review and future directions. Arch Womens Ment Health 2024:10.1007/s00737-023-01409-x. [PMID: 38221595 DOI: 10.1007/s00737-023-01409-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/02/2023] [Indexed: 01/16/2024]
Abstract
The link between sex hormones and schizophrenia has been suspected for over a century; however, scientific evidence supporting the pharmacotherapeutic effects of exogenous estrogen has only started to emerge during the past three decades. Accumulating evidence from epidemiological and basic research suggests that estrogen has a protective effect in women vulnerable to schizophrenia. Such evidence has led multiple researchers to investigate the role of estrogen in schizophrenia and its use in treatment. This narrative review provides an overview of the effects of estrogen as well as summarizes the recent work regarding estrogen as a treatment for schizophrenia, particularly the use of new-generation selective estrogen receptor modulators.
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Affiliation(s)
- Eveline Mu
- HER Centre Australia, Central Clinical School, Monash University, Melbourne, Victoria, Australia.
| | - Caroline Gurvich
- HER Centre Australia, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Jayashri Kulkarni
- HER Centre Australia, Central Clinical School, Monash University, Melbourne, Victoria, Australia
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Li S, Han X, Liu N, Chang J, Liu G, Hu S. Lactobacillus plantarum attenuates glucocorticoid-induced osteoporosis by altering the composition of rat gut microbiota and serum metabolic profile. Front Immunol 2024; 14:1285442. [PMID: 38264658 PMCID: PMC10803555 DOI: 10.3389/fimmu.2023.1285442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/20/2023] [Indexed: 01/25/2024] Open
Abstract
Introduction Osteoporosis, one of the most common non-communicable human diseases worldwide, is one of the most prevalent disease of the adult skeleton. Glucocorticoid-induced osteoporosis(GIOP) is the foremost form of secondary osteoporosis, extensively researched due to its prevalence.Probiotics constitute a primary bioactive component within numerous foods, offering promise as a potential biological intervention for preventing and treating osteoporosis. This study aimed to evaluate the beneficial effects of the probiotic Lactobacillus plantarum on bone health and its underlying mechanisms in a rat model of glucocorticoid dexamethasone-induced osteoporosis, using the osteoporosis treatment drug alendronate as a reference. Methods We examined the bone microstructure (Micro-CT and HE staining) and analyzed the gut microbiome and serum metabolome in rats. Results and discussion The results revealed that L. plantarum treatment significantly restored parameters of bone microstructure, with elevated bone density, increased number and thickness of trabeculae, and decreased Tb.Sp. Gut microbiota sequencing results showed that probiotic treatment increased gut microbial diversity and the ratio of Firmicutes to Bacteroidota decreased. Beneficial bacteria abundance was significantly increased (Lachnospiraceae_NK4A136_group, Ruminococcus, UCG_005, Romboutsia, and Christensenellaceae_R_7_group), and harmful bacteria abundance was significantly decreased (Desulfovibrionaceae). According to the results of serum metabolomics, significant changes in serum metabolites occurred in different groups. These differential metabolites were predominantly enriched within the pathways of Pentose and Glucuronate Interconversions, as well as Propanoate Metabolism. Furthermore, treatment of L. plantarum significantly increased serum levels of Pyrazine and gamma-Glutamylcysteine, which were associated with inhibition of osteoclast formation and promoting osteoblast formation. Lactobacillus plantarum can protect rats from DEX-induced GIOP by mediating the "gut microbial-bone axis" promoting the production of beneficial bacteria and metabolites. Therefore L. plantarum is a potential candidate for the treatment of GIOP.
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Affiliation(s)
- Siying Li
- The Orthopaedic Center, The First People’s Hospital of Wenling, Wenling Hospital of Wenzhou Medical University, Wenling, Zhejiang, China
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Xuebing Han
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Naiyuan Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Jiang Chang
- The Orthopaedic Center, The First People’s Hospital of Wenling, Wenling Hospital of Wenzhou Medical University, Wenling, Zhejiang, China
| | - Gang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Siwang Hu
- The Orthopaedic Center, The First People’s Hospital of Wenling, Wenling Hospital of Wenzhou Medical University, Wenling, Zhejiang, China
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Hasan A, Khan NA, Uddin S, Khan AQ, Steinhoff M. Deregulated transcription factors in the emerging cancer hallmarks. Semin Cancer Biol 2024; 98:31-50. [PMID: 38123029 DOI: 10.1016/j.semcancer.2023.12.001] [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: 09/28/2023] [Revised: 11/25/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
Cancer progression is a multifaceted process that entails several stages and demands the persistent expression or activation of transcription factors (TFs) to facilitate growth and survival. TFs are a cluster of proteins with DNA-binding domains that attach to promoter or enhancer DNA strands to start the transcription of genes by collaborating with RNA polymerase and other supporting proteins. They are generally acknowledged as the major regulatory molecules that coordinate biological homeostasis and the appropriate functioning of cellular components, subsequently contributing to human physiology. TFs proteins are crucial for controlling transcription during the embryonic stage and development, and the stability of different cell types depends on how they function in different cell types. The development and progression of cancer cells and tumors might be triggered by any anomaly in transcription factor function. It has long been acknowledged that cancer development is accompanied by the dysregulated activity of TF alterations which might result in faulty gene expression. Recent studies have suggested that dysregulated transcription factors play a major role in developing various human malignancies by altering and rewiring metabolic processes, modifying the immune response, and triggering oncogenic signaling cascades. This review emphasizes the interplay between TFs involved in metabolic and epigenetic reprogramming, evading immune attacks, cellular senescence, and the maintenance of cancer stemness in cancerous cells. The insights presented herein will facilitate the development of innovative therapeutic modalities to tackle the dysregulated transcription factors underlying cancer.
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Affiliation(s)
- Adria Hasan
- Molecular Cell Biology Laboratory, Integral Information and Research Centre-4 (IIRC-4), Integral University, Lucknow 226026, India; Department of Bioengineering, Faculty of Engineering, Integral University, Lucknow 226026, India
| | - Naushad Ahmad Khan
- Department of Surgery, Trauma and Vascular Surgery Clinical Research, Hamad General Hospital, Doha 3050, Qatar
| | - Shahab Uddin
- Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha 3050, Qatar; Department of Biosciences, Integral University, Lucknow 226026, India; Animal Research Center, Qatar University, Doha, Qatar; Dermatology Institute, Academic Health System, Hamad Medical Corporation, Doha 3050, Qatar
| | - Abdul Q Khan
- Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha 3050, Qatar.
| | - Martin Steinhoff
- Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha 3050, Qatar; Animal Research Center, Qatar University, Doha, Qatar; Department of Dermatology and Venereology, Rumailah Hospital, Hamad Medical Corporation, Doha 3050, Qatar; Department of Medicine, Weill Cornell Medicine Qatar, Qatar Foundation-Education City, Doha 24144, Qatar; Department of Medicine, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA; College of Medicine, Qatar University, Doha 2713, Qatar
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Mitsui Y, Ogawa K, Goto K, Fujii T, Nakamura-Nishimura Y, Mashiba K, Asada H. YAP1::MAML2 fusions in poromatosis: A report of two patients. J Cutan Pathol 2023. [PMID: 36723803 DOI: 10.1111/cup.14401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 12/16/2022] [Accepted: 01/29/2023] [Indexed: 02/02/2023]
Abstract
Poromatosis is a rare condition characterized by the development of multiple poromas, mainly reported in patients with a history of malignancy. Recently, frequent YAP1::MAML2 and YAP1::NUTM1 fusions have been described in poromas and porocarcinomas. To date, the molecular features of poromatosis have been investigated in one patient only, wherein the poromas harbored YAP1::MAML2 fusions. Herein, we present two additional cases of poromatosis with YAP1::MAML2 fusions. Case 1: An 81-year-old woman presented with nine papules on the scalp, trunk, and extremities persisting for a year. She had a history of breast cancer, with no information on the treatment. Seven papules were excised. Case 2: A 65-year-old woman presented with 21 lesions on her trunk and lower extremities persisting for 2 years. She had been diagnosed with breast cancer 11 years prior and had undergone partial mastectomy, radiotherapy, chemotherapy, and endocrine therapy. Four lesions were excised. All 11 lesions in both patients were histopathologically similar: anastomosing cords and strands extending from the epidermis, and poroid and cuticular cell proliferation with interspersed small ducts. The tumors showed diffuse nuclear expression of YAP1 N-terminus and loss of YAP1 C-terminus expression. No lesions showed NUT immunopositivity. Sanger sequencing identified YAP1::MAML2 fusions in the poromas of both patients.
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Affiliation(s)
- Yasuhiro Mitsui
- Department of Dermatology, Nara Medical University School of Medicine, Kashihara, Japan
| | - Kohei Ogawa
- Department of Dermatology, Nara Medical University School of Medicine, Kashihara, Japan
| | - Keisuke Goto
- Department of Pathology, Tokyo Metropolitan Cancer and Infectious Disease Center Komagome Hospital, Tokyo, Japan.,Department of Pathology, Itabashi Central Clinical Laboratory, Tokyo, Japan.,Department of Anatomic Pathology, Tokyo Medical University, Tokyo, Japan.,Department of Diagnostic Pathology, Shizuoka Cancer Center Hospital, Shizuoka, Japan.,Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute, Osaka, Japan.,Department of Diagnostic Pathology, Osaka National Hospital, Osaka, Japan.,Department of Dermatology, Hyogo Cancer Center, Akashi, Japan.,Department of Dermato-Oncology/Dermatology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Tomomi Fujii
- Department of Diagnostic Pathology, Nara Medical University School of Medicine, Kashihara, Japan
| | | | - Kumi Mashiba
- Division of Plastic Surgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Hideo Asada
- Department of Dermatology, Nara Medical University School of Medicine, Kashihara, Japan
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7
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DOK7 CpG hypermethylation in blood leukocytes as an epigenetic biomarker for acquired tamoxifen resistant in breast cancer. J Hum Genet 2023; 68:33-38. [PMID: 36372800 DOI: 10.1038/s10038-022-01092-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 09/28/2022] [Accepted: 10/05/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND Breast cancer (BC) is among the most common cause of cancer 10.4% and one of the leading causes of death among 20-50 years old women in the world. Tamoxifen drug is the first line therapy for BC however tamoxifen resistance (TR) has shown in 30-50% of cases that may face BC recurrence. Hence, TR early detection reduces BC recurrence and fatalities. The epigenetic alteration that happens by hypermethylation of tumor suppressor genes and hypomethylation of oncogenes has been suggested to be useful in early cancer or drug resistance diagnosis. METHODS This is the first study to investigate DOK7 CpG hypermethylation in blood leukocytes of 31 TR (ER+) BC compared to 29 tamoxifen sensitive BC to evaluate DOK7 as a potential TR biomarker. DNA was extracted from blood samples of all participants and MSRE-PCR and real-time PCR were used for quantification of CpG methylation alterations. RESULTS The means of DOK7 CpG hypermethylation were obtained as 85.03%, 29.1% and 57.34% in TR, TS and normal control respectively. Significant hypermethylation were found among TR vs. TS (p < 0.001), TS vs. normal (p < 0.001) and TR vs. normal controls (p < 0.03). Online databases expression and survival analysis of DOK7 showed increasing expression in TS groups vs. TR groups which have consistency with our methylation alteration results. The sensitivity and specificity of the TR epigenetic test were determined using ROC analysis showed 89.66% and 96.77% respectively and showed that 37.5% above hypermethylation is at risk for TR and breast cancer recurrence. CONCLUSION There is a significant difference in the methylation ratio of DOK7 between tamoxifen resistant and tamoxifen sensitive groups that may be useful in the early diagnosis of tamoxifen resistance in BC cases and cancer recurrence prevention.
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Pinto CA, Fonseca BM, Sá SI. Effects of chronic tamoxifen treatment in female rat sexual behaviour. Heliyon 2022; 8:e12362. [PMID: 36593822 PMCID: PMC9803792 DOI: 10.1016/j.heliyon.2022.e12362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 09/05/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
The medial preoptic (MPN) and the ventromedial hypothalamic nuclei (VMN) modulate the estrogen receptor (ER)-dependent female sexual behavior, a response that is inhibited by tamoxifen (TAM), a modulator of the steroid receptor activation. With the objective to assess TAM action in the brain areas involved in the modulation sexual cues, an animal model on long-term TAM therapy to intact female rats, was used to mimic the 5-year prophylactic TAM therapy offered to women at higher risk of breast cancer. After three months treatment, female sexual behavior with a stud male rat was evaluated. Upon sacrifice, the brains were removed and the MPN and the ventrolateral division of the VMN were screened for the effects of TAM in the expression of ERα, ERβ and progesterone receptor. Results show that TAM inhibited the receptive component of the female sexual behavior. Even though TAM decreased estrogen and progesterone levels to values similar to the ones of estrous and diestrus rats, the biochemical data failed to demonstrate such possible causation for the behavioral response. In fact, TAM administration induced a constant low level of ovarian hormones that changed the pattern of ER and PR expression as well as receptor co-expression in the brain areas regulating the behavioral response, dissimilar to the ones seen in the cycle phases with the same low hormone levels. Nevertheless, present data suggests that by affecting ER- and/or PR-dependent mechanisms, TAM may modulate the hypothalamus, a region known to participate in several social behaviors.
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Affiliation(s)
- Cláudia A. Pinto
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Al Professor Hernani Monteiro, 4200-319 Porto, Portugal
| | - Bruno M. Fonseca
- UCIBIO, REQUIMTE, Laboratory of Biochemistry, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira nº. 228, 4050-313 Porto, Portugal
| | - Susana I. Sá
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Al Professor Hernani Monteiro, 4200-319 Porto, Portugal,CINTESIS@RISE Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto. Al Professor Hernani Monteiro, 4200-319 Porto, Portugal,Corresponding author.
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Bhandari A, Kalotra S, Bajaj P, Sunkaria A, Kaur G. Dietary intervention with Tinospora cordifolia improved aging-related decline in locomotor coordination and cerebellar cell survival and plasticity in female rats. Biogerontology 2022; 23:809-824. [PMID: 35767131 DOI: 10.1007/s10522-022-09975-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 06/10/2022] [Indexed: 12/13/2022]
Abstract
Reduced bone mineral density, and muscle strength are the hallmark of aging-related motor coordination deficits and related neuropathologies. Since cerebellum regulates motor movements and balance perception of our body, therefore it may be an important target to control the age-related progression of motor dysfunctions. Dry stem powder of Tinospora cordifolia (TCP) was tested as a food supplement to elucidate its activity to attenuate age-associated locomotor dysfunctions. Intact acyclic middle-aged female rats were used in this study as the model system of the transition phase from premenopause to menopause in women along with cycling young adult rats. Normal chow or 30% High Fat Diet (HFD), supplemented with or without TCP was fed to animals for 12 weeks and then tested for locomotor performance on rotarod followed by post-sacrifice protein expression studies. In comparison to young adults, middle-aged animals showed an increase in number of falls and lesser time spent in rotarod performance test, whereas, animals given TCP supplemented feed showed improvement in performance with more pronounced effects observed in normal chow than HFD fed middle-aged rats. Further, due to its multicomponent nature TCP was found to target the expression of various markers of neuroinflammation, apoptosis, cell survival, and synaptic plasticity in the cerebellum region. The current findings suggest that TCP supplementation in the diet may prove to be a potential interventional strategy for the management of frailty and fall-associated morbidities caused by aging-related deterioration of bone mineral density, and muscle strength.
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Affiliation(s)
- Anmol Bhandari
- Medical Biotechnology Laboratory, Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India
| | - Shikha Kalotra
- Medical Biotechnology Laboratory, Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India
| | - Payal Bajaj
- Medical Biotechnology Laboratory, Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India
| | - Aditya Sunkaria
- Medical Biotechnology Laboratory, Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Gurcharan Kaur
- Medical Biotechnology Laboratory, Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India.
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Li Y, Azmi AS, Mohammad RM. Deregulated transcription factors and poor clinical outcomes in cancer patients. Semin Cancer Biol 2022; 86:122-134. [PMID: 35940398 DOI: 10.1016/j.semcancer.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/22/2022] [Accepted: 08/04/2022] [Indexed: 01/27/2023]
Abstract
Transcription factors are a group of proteins, which possess DNA-binding domains, bind to DNA strands of promoters or enhancers, and initiate transcription of genes with cooperation of RNA polymerase and other co-factors. They play crucial roles in regulating transcription during embryogenesis and development. Their physiological status in different cell types is also important to maintain cellular homeostasis. Therefore, any deregulation of transcription factors will lead to the development of cancer cells and tumor progression. Based on their functions in cancer cells, transcription factors could be either oncogenic or tumor suppressive. Furthermore, transcription factors have been shown to modulate cancer stem cells, epithelial-mesenchymal transition (EMT) and drug response; therefore, measuring deregulated transcription factors is hypothesized to predict treatment outcomes of patients with cancers and targeting deregulated transcription factors could be an encouraging strategy for cancer therapy. Here, we summarize the current knowledge of major deregulated transcription factors and their effects on causing poor clinical outcome of patients with cancer. The information presented here will help to predict the prognosis and drug response and to design novel drugs and therapeutic strategies for the treatment of cancers by targeting deregulated transcription factors.
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Affiliation(s)
- Yiwei Li
- Karmanos Cancer Institute and Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Asfar S Azmi
- Karmanos Cancer Institute and Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Ramzi M Mohammad
- Karmanos Cancer Institute and Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA.
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Impacts of synthetic androgen and estrogenic antagonist administration on growth performance, sex steroids hormones, and immune markers of male and female broilers. Poult Sci 2022; 102:102244. [PMID: 36335738 PMCID: PMC9640317 DOI: 10.1016/j.psj.2022.102244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 09/23/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022] Open
Abstract
The influence of synthetic androgen and estrogenic antagonists (Tamoxifen) on body characteristics and immune response of male and female broilers and the correlation between sex hormone levels were estimated in our experiment. One day old chicks were sexed, and chicks of each sex were randomly distributed on three experimental treatments; the first treatment group (TAM20) chicks were supplied with estrogenic antagonist tamoxifen citrate 20 mg/kg body weight through oral administration for four times every other day from third until ninth d; Androgen treatment chicks were injected intramuscular with veterinary androgen AD GAN@ (Boldenone Undecylenate 50 mg) 1 cm/10 kg body weight at fifth and ninth day, and the third treatment was control. Androgen treatment reported the highest feed intake with the lowest for TAM20 treatment. Concerning carcass characteristics, early androgen injection increased breast percentage significantly compared to TAM20 treatment. Androgen supplementation increased significantly comb the percentage. However, TAM20 decreased it particularly compared to control. Moreover, the percentage of comb and shanks was substantially higher for males than females. Concerning the effects of both treatments on sex hormones, androgen showed favorable effects on testosterone and estrogen compared to Tamoxifen 20 treatment. On the other hand, the administration of TAM 20 improves phagocytic activity compared to androgen administration.
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Ren P, Tiede C, Fanning SW, Adams T, Speirs V, Nelson ER, Cheng C, Moore TW, Greene GL, Tomlinson D, Selvin PR. Labeling of a mutant estrogen receptor with an Affimer in a breast cancer cell line. Biophys J 2022; 121:3651-3662. [PMID: 35778844 PMCID: PMC9617163 DOI: 10.1016/j.bpj.2022.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 05/23/2022] [Accepted: 06/27/2022] [Indexed: 11/22/2022] Open
Abstract
Mutations of the intracellular estrogen receptor alpha (ERα) is implicated in 70% of breast cancers. Therefore, it is of considerable interest to image various mutants (L536S, Y537S, D538G) in living cancer cell lines, particularly as a function of various anticancer drugs. We therefore developed a small (13 kDa) Affimer, which, after fluorescent labeling, is able to efficiently label ERα by traveling through temporary pores in the cell membrane, created by the toxin streptolysin O. The Affimer, selected by a phage display, predominantly labels the Y537S mutant and can tell the difference between L536S and D538G mutants. The vast majority of Affimer-ERαY537S is in the nucleus and is capable of an efficient, unrestricted navigation to its target DNA sequence, as visualized by single-molecule fluorescence. The Affimer can also differentiate the effect of selective estrogen receptor modulators. More generally, this is an example of a small binding reagent-an Affimer protein-that can be inserted into living cells with minimal perturbation and high efficiency, to image an endogenous protein.
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Affiliation(s)
- Pin Ren
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois; Center for Physics of Living Cells, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Christian Tiede
- School of Molecular and Cellular Biology, University of Leeds, Leeds, UK
| | - Sean W Fanning
- Department of Cancer Research, Loyola University Chicago, Maywood, Illinois
| | - Thomas Adams
- School of Molecular and Cellular Biology, University of Leeds, Leeds, UK
| | - Valerie Speirs
- Institute of Medical Sciences, School of Medicine Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK
| | - Erik R Nelson
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, Illinois; Cancer Center at Illinois, University of Illinois Urbana-Champaign, Urbana, Illinois; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, Illinois; Carl R. Woese Institute for Genomic Biology, Anticancer Discovery from Pets to People Theme, University of Illinois Urbana-Champaign, Urbana, Illinois; University of Illinois Cancer Center, University of Illinois at Chicago, Chicago, Illinois
| | - Changfeng Cheng
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago (UIC), Chicago, Illinois
| | - Terry W Moore
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago (UIC), Chicago, Illinois; UI Cancer Center, University of Illinois at Chicago (UIC), Chicago, Illinois
| | - Geoffrey L Greene
- Ben May Department for Cancer Research, University of Chicago, Chicago, Illinois
| | - Darren Tomlinson
- School of Molecular and Cellular Biology, University of Leeds, Leeds, UK
| | - Paul R Selvin
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois; Center for Physics of Living Cells, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois; Cancer Center at Illinois, University of Illinois Urbana-Champaign, Urbana, Illinois.
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13
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Messier TL, Boyd JR, Gordon JAR, Tye CE, Page NA, Toor RH, Zaidi SK, Komm BS, Frietze S, Stein JL, Lian JB, Stein GS. Epigenetic and transcriptome responsiveness to ER modulation by tissue selective estrogen complexes in breast epithelial and breast cancer cells. PLoS One 2022; 17:e0271725. [PMID: 35862394 PMCID: PMC9302754 DOI: 10.1371/journal.pone.0271725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 07/06/2022] [Indexed: 01/07/2023] Open
Abstract
Selective estrogen receptor modulators (SERMs), including the SERM/SERD bazedoxifene (BZA), are used to treat postmenopausal osteoporosis and may reduce breast cancer (BCa) risk. One of the most persistent unresolved questions regarding menopausal hormone therapy is compromised control of proliferation and phenotype because of short- or long-term administration of mixed-function estrogen receptor (ER) ligands. To gain insight into epigenetic effectors of the transcriptomes of hormone and BZA-treated BCa cells, we evaluated a panel of histone modifications. The impact of short-term hormone treatment and BZA on gene expression and genome-wide epigenetic profiles was examined in ERαneg mammary epithelial cells (MCF10A) and ERα+ luminal breast cancer cells (MCF7). We tested individual components and combinations of 17β-estradiol (E2), estrogen compounds (EC10) and BZA. RNA-seq for gene expression and ChIP-seq for active (H3K4me3, H3K4ac, H3K27ac) and repressive (H3K27me3) histone modifications were performed. Our results show that the combination of BZA with E2 or EC10 reduces estrogen-mediated patterns of histone modifications and gene expression in MCF-7ERα+ cells. In contrast, BZA has minimal effects on these parameters in MCF10A mammary epithelial cells. BZA-induced changes in histone modifications in MCF7 cells are characterized by altered H3K4ac patterns, with changes at distal enhancers of ERα-target genes and at promoters of non-ERα bound proliferation-related genes. Notably, the ERα target gene GREB1 is the most sensitive to BZA treatment. Our findings provide direct mechanistic-based evidence that BZA induces epigenetic changes in E2 and EC10 mediated control of ERα regulatory programs to target distinctive proliferation gene pathways that restrain the potential for breast cancer development.
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Affiliation(s)
- Terri L. Messier
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Joseph R. Boyd
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Jonathan A. R. Gordon
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Coralee E. Tye
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Natalie A. Page
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Rabail H. Toor
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Sayyed K. Zaidi
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Barry S. Komm
- Komm Pharma Consulting LLC, San Francisco, CA, United States of America
| | - Seth Frietze
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- Department of Biomedical and Health Sciences, University of Vermont, Burlington, VT, United States of America
| | - Janet L. Stein
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Jane B. Lian
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
| | - Gary S. Stein
- Department of Biochemistry, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- University of Vermont Cancer Center, University of Vermont Larner College of Medicine, Burlington, VT, United States of America
- Department of Surgery, University of Vermont, Burlington, VT, United States of America
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14
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Gao W, Hu H, Dai L, He M, Yuan H, Zhang H, Liao J, Wen B, Li Y, Palmisano M, Traore MDM, Zhou S, Sun D. Structure‒tissue exposure/selectivity relationship (STR) correlates with clinical efficacy/safety. Acta Pharm Sin B 2022; 12:2462-2478. [PMID: 35646532 PMCID: PMC9136610 DOI: 10.1016/j.apsb.2022.02.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 01/23/2022] [Accepted: 02/12/2022] [Indexed: 11/17/2022] Open
Abstract
Drug optimization, which improves drug potency/specificity by structure‒activity relationship (SAR) and drug-like properties, is rigorously performed to select drug candidates for clinical trials. However, the current drug optimization may overlook the structure‒tissue exposure/selectivity-relationship (STR) in disease-targeted tissues vs. normal tissues, which may mislead the drug candidate selection and impact the balance of clinical efficacy/toxicity. In this study, we investigated the STR in correlation with observed clinical efficacy/toxicity using seven selective estrogen receptor modulators (SERMs) that have similar structures, same molecular target, and similar/different pharmacokinetics. The results showed that drug's plasma exposure was not correlated with drug's exposures in the target tissues (tumor, fat pad, bone, uterus), while tissue exposure/selectivity of SERMs was correlated with clinical efficacy/safety. Slight structure modifications of four SERMs did not change drug's plasma exposure but altered drug's tissue exposure/selectivity. Seven SERMs with high protein binding showed higher accumulation in tumors compared to surrounding normal tissues, which is likely due to tumor EPR effect of protein-bound drugs. These suggest that STR alters drug's tissue exposure/selectivity in disease-targeted tissues vs. normal tissues impacting clinical efficacy/toxicity. Drug optimization needs to balance the SAR and STR in selecting drug candidate for clinical trial to improve success of clinical drug development.
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Affiliation(s)
- Wei Gao
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Hongxiang Hu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Lipeng Dai
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Miao He
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Hebao Yuan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Huixia Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jinhui Liao
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Bo Wen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yan Li
- Translational Development and Clinical Pharmacology, Bristol Myers Squibb, Summit, NJ 07920, USA
| | - Maria Palmisano
- Translational Development and Clinical Pharmacology, Bristol Myers Squibb, Summit, NJ 07920, USA
| | - Mohamed Dit Mady Traore
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Simon Zhou
- Translational Development and Clinical Pharmacology, Bristol Myers Squibb, Summit, NJ 07920, USA
| | - Duxin Sun
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
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15
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Alsous L, Bardaweel S. Selective Estrogen Receptor Modulators (SERMs) Synergize with Cisplatin, Induce Apoptosis and Suppress Cellular Migration and Colony Formation of Lung Cancer Cells. Anticancer Agents Med Chem 2022; 22:1826-1836. [DOI: 10.2174/1871520621666210908110902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 07/12/2021] [Accepted: 07/26/2021] [Indexed: 11/22/2022]
Abstract
Background:
Lung cancer remains the leading cause of cancer-related deaths worldwide. Hence, novel
therapeutic approaches targeting crucial pathways are needed to improve its treatment. Previous studies have verified
the involvement of the estrogen pathway, mediated through estrogen receptor β (ERβ), in the development and progression
of lung carcinogenesis. Selective estrogen receptor modulators (SERMs) are a group of estrogen receptor
agonists/antagonists that have tissue selective effects. Many of the available SERMs are used for the management of
breast cancer. However, their role in lung cancer is still under investigation.
Objectives:
The aim of this research is to investigate the anti-tumorigenic activity of the selective estrogen receptor
modulators, tamoxifen, raloxifene, and toremifene, against different lung cancer cell lines.
Methods:
The anti-proliferative and combined effects of SERMs with standard chemotherapy were evaluated by MTT
assay. Cell migration was assessed using a wound-healing assay. The mechanism of cell death was determined using
the Annexin V-FITC/ propidium iodide staining flow cytometry method. Cells’ capability to form colonies was evaluated
by soft agar colony formation assay. Estrogen receptors expression was determined using real-time PCR.
Results:
Our results have demonstrated the presence of ERβ in A549, H1299, and H661 lung cancer cells. Cellular
proliferation assay suggested that SERMs have significantly reduced lung cancer cells proliferation in a time and concentration-
dependent manner. Additionally, SERMs exhibited a synergistic effect against A549 cells when combined
with cisplatin. SERMs treatment have increased cell apoptosis and resulted in concentration-dependent inhibition of
cell migration and colony formation of A549 cells.
Conclusion:
Selective estrogen receptor modulators may possess potential therapeutic utility for the treatment of lung
cancer as monotherapy or in combination with standard chemotherapy.
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Affiliation(s)
- Lina Alsous
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Jordan, Amman 11942, Jordan
| | - Sanaa Bardaweel
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Jordan, Amman 11942, Jordan
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16
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Mei Y, Williams JS, Webb EK, Shea AK, MacDonald MJ, Al-Khazraji BK. Roles of Hormone Replacement Therapy and Menopause on Osteoarthritis and Cardiovascular Disease Outcomes: A Narrative Review. FRONTIERS IN REHABILITATION SCIENCES 2022; 3:825147. [PMID: 36189062 PMCID: PMC9397736 DOI: 10.3389/fresc.2022.825147] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/07/2022] [Indexed: 11/28/2022]
Abstract
Osteoarthritis (OA) is a highly prevalent condition characterized by degradation of the joints. OA and cardiovascular disease (CVD) are leading contributors to disease burden worldwide, with a high level of overlap between the risk factors and occurrence of both conditions. Chief among the risk factors that contribute to OA and CVD are sex and age, which are both independent and interacting traits. Specifically, the prevalence of both conditions is higher in older women, which may be mediated by the occurrence of menopause. Menopause represents a significant transition in a women's life, and the rapid decline in circulating sex hormones, estrogen and progesterone, leads to complex physiological changes. Declines in hormone levels may partially explain the increase in prevalence of OA and CVD in post-menopausal women. In theory, the use of hormone therapy (HT) may buffer adverse effects of menopause; however, it is unclear whether HT offers protective effects for the onset or progression of these diseases. Studies have shown mixed results when describing the influence of HT on disease risk among post-menopausal women, which warrants further exploration. The roles that increasing age, female sex, HT, and CVD play in OA risk demonstrate that OA is a multifaceted condition. This review provides a timely consolidation of current literature and suggests aims for future research directions to bridge gaps in the understanding of how OA, CVD, and HT interact in post-menopausal women.
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Affiliation(s)
- Yixue Mei
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON, Canada
| | - Jennifer S. Williams
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON, Canada
| | - Erin K. Webb
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON, Canada
| | - Alison K. Shea
- Department of Obstetrics and Gynaecology, Faculty of Medicine, McMaster University, Hamilton, ON, Canada
| | - Maureen J. MacDonald
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON, Canada
| | - Baraa K. Al-Khazraji
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton, ON, Canada
- *Correspondence: Baraa K. Al-KhazrajiS
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17
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Gérard C, Arnal JF, Jost M, Douxfils J, Lenfant F, Fontaine C, Houtman R, Archer DF, Reid RL, Lobo RA, Gaspard U, Coelingh Bennink HJT, Creinin MD, Foidart JM. Profile of estetrol, a promising native estrogen for oral contraception and the relief of climacteric symptoms of menopause. Expert Rev Clin Pharmacol 2022; 15:121-137. [PMID: 35306927 DOI: 10.1080/17512433.2022.2054413] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Estrogens used in women's healthcare have been associated with increased risks of venous thromboembolism (VTE) and breast cancer. Estetrol (E4), an estrogen produced by the human fetal liver, has recently been approved for the first time as a new estrogenic component of a novel combined oral contraceptive (E4/drospirenone [DRSP]) for over a decade. In phase 3 studies, E4/DRSP showed good contraceptive efficacy, a predictable bleeding pattern, and a favorable safety and tolerability profile. AREAS COVERED This narrative review discusses E4's pharmacological characteristics, mode of action, and the results of preclinical and clinical studies for contraception, as well as for menopause and oncology. EXPERT OPINION Extensive studies have elucidated the properties of E4 that underlie its favorable safety profile. While classical estrogens (such as estradiol) exert their actions via both activation of nuclear and membrane estrogen receptor α (ERα), E4 presents a specific profile of ERα activation: E4 binds and activates nuclear ERα but does not induce the activation of membrane ERα signaling pathways in specific tissues. E4 has a small effect on normal breast tissue proliferation and minimally affects hepatic parameters. This distinct profile of ERα activation, uncoupling nuclear and membrane activation, is unique.
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Affiliation(s)
- Céline Gérard
- Department Research and Development, Estetra Srl, an Affiliate Company of Mithra Pharmaceuticals, Liège, Belgium
| | - Jean-François Arnal
- CHU de Toulouse, Université Toulouse III, Toulouse, France.,INSERM-UPS UMR U1297, Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, Toulouse, France
| | - Maud Jost
- Department Research and Development, Estetra Srl, an Affiliate Company of Mithra Pharmaceuticals, Liège, Belgium
| | - Jonathan Douxfils
- Qualiblood S.a, Namur, Belgium.,Department of Pharmacy, Namur Thrombosis and Hemostasis Center, NAmur Research Institute for Life Sciences, University of Namur, Namur, Belgium
| | - Françoise Lenfant
- CHU de Toulouse, Université Toulouse III, Toulouse, France.,INSERM-UPS UMR U1297, Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, Toulouse, France
| | - Coralie Fontaine
- CHU de Toulouse, Université Toulouse III, Toulouse, France.,INSERM-UPS UMR U1297, Institut des Maladies Métaboliques et Cardiovasculaires, Université de Toulouse, Toulouse, France
| | | | | | - Robert L Reid
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Queen's University, Kingston, Canada
| | - Rogerio A Lobo
- Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, USA
| | - Ulysse Gaspard
- Department of Obstetrics and Gynecology, University of Liège, Liège, Belgium
| | | | - Mitchell D Creinin
- Department of Obstetrics and Gynecology, University of California, Sacramento, USA
| | - Jean-Michel Foidart
- Department Research and Development, Estetra Srl, an Affiliate Company of Mithra Pharmaceuticals, Liège, Belgium.,Department of Obstetrics and Gynecology, University of Liège, Liège, Belgium
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18
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Yu K, Huang ZY, Xu XL, Li J, Fu XW, Deng SL. Estrogen Receptor Function: Impact on the Human Endometrium. Front Endocrinol (Lausanne) 2022; 13:827724. [PMID: 35295981 PMCID: PMC8920307 DOI: 10.3389/fendo.2022.827724] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 02/01/2022] [Indexed: 12/12/2022] Open
Abstract
The physiological role of estrogen in the female endometrium is well established. On the basis of responses to steroid hormones (progesterone, androgen, and estrogen), the endometrium is considered to have proliferative and secretory phases. Estrogen can act in the endometrium by interacting with estrogen receptors (ERs) to induce mucosal proliferation during the proliferative phase and progesterone receptor (PR) synthesis, which prepare the endometrium for the secretory phase. Mouse knockout studies have shown that ER expression, including ERα, ERβ, and G-protein-coupled estrogen receptor (GPER) in the endometrium is critical for normal menstrual cycles and subsequent pregnancy. Incorrect expression of ERs can produce many diseases that can cause endometriosis, endometrial hyperplasia (EH), and endometrial cancer (EC), which affect numerous women of reproductive age. ERα promotes uterine cell proliferation and is strongly associated with an increased risk of EC, while ERβ has the opposite effects on ERα function. GPER is highly expressed in abnormal EH, but its expression in EC patients is paradoxical. Effective treatments for endometrium-related diseases depend on understanding the physiological function of ERs; however, much less is known about the signaling pathways through which ERs functions in the normal endometrium or in endometrial diseases. Given the important roles of ERs in the endometrium, we reviewed the published literature to elaborate the regulatory role of estrogen and its nuclear and membrane-associated receptors in maintaining the function of endometrium and to provide references for protecting female reproduction. Additionally, the role of drugs such as tamoxifen, raloxifene, fulvestrant and G-15 in the endometrium are also described. Future studies should focus on evaluating new therapeutic strategies that precisely target specific ERs and their related growth factor signaling pathways.
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Affiliation(s)
- Kun Yu
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, Breeding and Reproduction, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zheng-Yuan Huang
- Chelsea and Westminster Hospital, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom
| | - Xue-Ling Xu
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, Breeding and Reproduction, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jun Li
- Department of Reproductive Medicine, The First Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiang-Wei Fu
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, Breeding and Reproduction, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shou-Long Deng
- National Health Commission of China (NHC) Key Laboratory of Human Disease Comparative Medicine, Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical College, Beijing, China
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19
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Sun D, Gao W, Hu H, Zhou S. Why 90% of clinical drug development fails and how to improve it? Acta Pharm Sin B 2022; 12:3049-3062. [PMID: 35865092 PMCID: PMC9293739 DOI: 10.1016/j.apsb.2022.02.002] [Citation(s) in RCA: 287] [Impact Index Per Article: 143.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 02/03/2022] [Accepted: 02/06/2022] [Indexed: 12/14/2022] Open
Abstract
Ninety percent of clinical drug development fails despite implementation of many successful strategies, which raised the question whether certain aspects in target validation and drug optimization are overlooked? Current drug optimization overly emphasizes potency/specificity using structure‒activity-relationship (SAR) but overlooks tissue exposure/selectivity in disease/normal tissues using structure‒tissue exposure/selectivity–relationship (STR), which may mislead the drug candidate selection and impact the balance of clinical dose/efficacy/toxicity. We propose structure‒tissue exposure/selectivity–activity relationship (STAR) to improve drug optimization, which classifies drug candidates based on drug's potency/selectivity, tissue exposure/selectivity, and required dose for balancing clinical efficacy/toxicity. Class I drugs have high specificity/potency and high tissue exposure/selectivity, which needs low dose to achieve superior clinical efficacy/safety with high success rate. Class II drugs have high specificity/potency and low tissue exposure/selectivity, which requires high dose to achieve clinical efficacy with high toxicity and needs to be cautiously evaluated. Class III drugs have relatively low (adequate) specificity/potency but high tissue exposure/selectivity, which requires low dose to achieve clinical efficacy with manageable toxicity but are often overlooked. Class IV drugs have low specificity/potency and low tissue exposure/selectivity, which achieves inadequate efficacy/safety, and should be terminated early. STAR may improve drug optimization and clinical studies for the success of clinical drug development.
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20
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Challenging Approach to the Development of Novel Estrogen Receptor Modulators Based on the Chemical Properties of Guaiazulene. Int J Mol Sci 2022; 23:ijms23031113. [PMID: 35163039 PMCID: PMC8835499 DOI: 10.3390/ijms23031113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 01/01/2022] [Accepted: 01/13/2022] [Indexed: 02/04/2023] Open
Abstract
Tamoxifen, a therapeutic agent for breast cancer, has been associated with genetic polymorphisms in the metabolism of N,N-dialkylaminoethyl substituent, which plays an important role in the expression of selective estrogen receptor modulator (SERM) activity. To solve this problem, we developed a novel estrogen receptor (ER) modulator, Az-01, on the basis of the aromaticity, dipole moment, and isopropyl group of guaiazulene. Az-01 showed four-fold lower binding affinity for ER than E2 but had similar ER-binding affinity to that of 4-hydroxytamoxifen (4-HOtam). Unlike tamoxifen, Az-01 acted as a partial agonist with very weak estrogenic activity at high concentrations when used alone, and it showed potent anti-estrogenic activity in the presence of E2. The cell proliferation and inhibition activities of Az-01 were specific to ER-expressing MCF-7 cells, and no effect of Az-01 on other cell proliferation signals was observed. These findings are important for the development of new types of SERMs without the N,N-dialkylaminoethyl substituent as a privileged functional group for SERMs.
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21
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Nordstrom BL, Cai B, De Gregorio F, Ban L, Fraeman KH, Yoshida Y, Gibbs T. Risk of venous thromboembolism among women receiving ospemifene: a comparative observational study. Ther Adv Drug Saf 2022; 13:20420986221135931. [DOI: 10.1177/20420986221135931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 10/13/2022] [Indexed: 11/21/2022] Open
Abstract
Introduction: The primary aim of this study was to compare the incidence of venous thromboembolism (VTE) among women initiating ospemifene vs other selective estrogen receptor modulator (SERM) therapies for estrogen-deficiency conditions or breast cancer prevention, and vs women with untreated vulvar and vaginal atrophy (VVA). The secondary objective examined numerous additional safety outcomes. Methods: This was a retrospective cohort study using the IBM Watson MarketScan claims database. Women receiving ospemifene, another SERM, or with a new diagnosis of VVA with no treatment from 1 May 2013 to 2 October 2018 were followed through the claims for incident adverse outcomes. The primary outcome was the first occurrence of VTE following cohort entry; secondary outcomes included cerebrovascular events and other adverse events potentially associated with SERM use. Cox models compared the risk of VTE between ospemifene and comparators, using a variety of approaches to control for confounding. Results: The incidence of VTE during the first continuous treatment episode was 3.39 (95% confidence interval [CI]: 1.55–6.43) events per 1,000 person-years (PY) for ospemifene ( N = 8977), 11.30 (95% CI: 8.81–14.28) events per 1,000 PY for comparator SERM ( N = 12,621), and 10.92 (95% CI: 10.49–11.37) events per 1,000 PY for untreated VVA ( N = 242,488). Cox models indicated no increase in risk of VTE for ospemifene vs other SERMs (hazard ratio [HR]: 0.40, 95% CI: 0.19–0.82), and vs untreated VVA (HR: 0.47, 95% CI: 0.24–0.91). Conclusion: This real-world safety analysis found no increase in risk of VTE or other adverse events with use of ospemifene in postmenopausal women. Plain Language Summary Introduction: This study assessed the risk of venous thromboembolism (VTE) among women treated with ospemifene or another selective estrogen receptor modulator (SERM) therapy and women with untreated vulvar and vaginal atrophy (VVA). Numerous additional safety outcomes were examined. Methods: This study was conducted in the IBM Watson MarketScan claims database. Women receiving ospemifene, another SERM, or with a new diagnosis of VVA with no treatment from 1 May 2013 to 2 October 2018 were followed through the claims for adverse outcomes, including VTE, cerebrovascular events (such as stroke), and other outcomes that might occur with use of a SERM. The analyses compared the risk of VTE between ospemifene and the other two groups, using methods that accounted for differences in patient characteristics between the groups. Because few women over 72 years old used ospemifene, the main analyses examined women aged 54–72 years. Results: The analyses included 8,977 ospemifene users, 12,621 other SERM users, and 242,488 women with untreated VVA. Among women aged 54–72 years, only 9 experienced a VTE during ospemifene treatment, while 55 other SERM users and 1,788 women with untreated VVA had a VTE. The analyses that accounted for differences between the groups confirmed that the risk of VTE was no higher in ospemifene users than in either comparison group. Conclusion: This real-world safety analysis found no increase in risk of VTE or other adverse events with use of ospemifene in postmenopausal women.
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Affiliation(s)
| | - Bin Cai
- Shionogi Inc., Florham Park, NJ, USA
| | | | - Lu Ban
- PPD Beijing, Beijing, China
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Atakpa EC, Thorat MA, Cuzick J, Brentnall AR. Mammographic density, endocrine therapy and breast cancer risk: a prognostic and predictive biomarker review. Cochrane Database Syst Rev 2021; 10:CD013091. [PMID: 34697802 PMCID: PMC8545623 DOI: 10.1002/14651858.cd013091.pub2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Endocrine therapy is effective at preventing or treating breast cancer. Some forms of endocrine therapy have been shown to reduce mammographic density. Reduced mammographic density for women receiving endocrine therapy could be used to estimate the chance of breast cancer returning or developing breast cancer in the first instance (a prognostic biomarker). In addition, changes in mammographic density might be able to predict how well a woman responds to endocrine therapy (a predictive biomarker). The role of breast density as a prognostic or predictive biomarker could help improve the management of breast cancer. OBJECTIVES To assess the evidence that a reduction in mammographic density following endocrine therapy for breast cancer prevention in women without previous breast cancer, or for treatment in women with early-stage hormone receptor-positive breast cancer, is a prognostic or predictive biomarker. SEARCH METHODS We searched the Cochrane Breast Cancer Group Specialised Register, CENTRAL, MEDLINE, Embase, and two trials registers on 3 August 2020 along with reference checking, bibliographic searching, and contact with study authors to obtain further data. SELECTION CRITERIA We included randomised, cohort and case-control studies of adult women with or without breast cancer receiving endocrine therapy. Endocrine therapy agents included were selective oestrogen receptor modulators and aromatase inhibitors. We required breast density before start of endocrine therapy and at follow-up. We included studies published in English. DATA COLLECTION AND ANALYSIS We used standard methodological procedures expected by Cochrane. Two review authors independently extracted data and assessed risk of bias using adapted Quality in Prognostic Studies (QUIPS) and Risk Of Bias In Non-randomised Studies - of Interventions (ROBINS-I) tools. We used the GRADE approach to evaluate the certainty of the evidence. We did not perform a quantitative meta-analysis due to substantial heterogeneity across studies. MAIN RESULTS Eight studies met our inclusion criteria, of which seven provided data on outcomes listed in the protocol (5786 women). There was substantial heterogeneity across studies in design, sample size (349 to 1066 women), participant characteristics, follow-up (5 to 14 years), and endocrine therapy agent. There were five breast density measures and six density change definitions. All studies had at least one domain as at moderate or high risk of bias. Common concerns were whether the study sample reflected the review target population, and likely post hoc definitions of breast density change. Most studies on prognosis for women receiving endocrine therapy reported a reduced risk associated with breast density reduction. Across endpoints, settings, and agents, risk ratio point estimates (most likely value) were between 0.1 and 1.5, but with substantial uncertainty. There was greatest consistency in the direction and magnitude of the effect for tamoxifen (across endpoints and settings, risk ratio point estimates were between 0.3 and 0.7). The findings are summarised as follows. Prognostic biomarker findings: Treatment Breast cancer mortality Two studies of 823 women on tamoxifen (172 breast cancer deaths) reported risk ratio point estimates of ~0.4 and ~0.5 associated with a density reduction. The certainty of the evidence was low. Recurrence Two studies of 1956 women on tamoxifen reported risk ratio point estimates of ~0.4 and ~0.7 associated with a density reduction. There was risk of bias in methodology for design and analysis of the studies and considerable uncertainty over the size of the effect. One study of 175 women receiving an aromatase inhibitor reported a risk ratio point estimate of ~0.1 associated with a density reduction. There was considerable uncertainty about the effect size and a moderate or high risk of bias in all domains. One study of 284 women receiving exemestane or tamoxifen as part of a randomised controlled trial reported risk ratio point estimates of ~1.5 (loco-regional recurrence) and ~1.3 (distance recurrence) associated with a density reduction. There was risk of bias in reporting and study confounding, and uncertainty over the size of the effects. The certainty of the evidence for all recurrence endpoints was very low. Incidence of a secondary primary breast cancer Two studies of 451 women on exemestane, tamoxifen, or unknown endocrine therapy reported risk ratio point estimates of ~0.5 and ~0.6 associated with a density reduction. There was risk of bias in reporting and study confounding, and uncertainty over the effect size. The certainty of the evidence was very low. We were unable to find data regarding the remaining nine outcomes prespecified in the review protocol. Prevention Incidence of invasive breast cancer and ductal carcinoma in situ (DCIS) One study of 507 women without breast cancer who were receiving preventive tamoxifen as part of a randomised controlled trial (51 subsequent breast cancers) reported a risk ratio point estimate of ~0.3 associated with a density reduction. The certainty of the evidence was low. Predictive biomarker findings: One study of a subset of 1065 women from a randomised controlled trial assessed how much the effect of endocrine therapy could be explained by breast density declines in those receiving endocrine therapy. This study evaluated the prevention of invasive breast cancer and DCIS. We found some evidence to support the hypothesis, with a risk ratio interaction point estimate ~0.5. However, the 95% confidence interval included unity, and data were based on 51 women with subsequent breast cancer in the tamoxifen group. The certainty of the evidence was low. AUTHORS' CONCLUSIONS There is low-/very low-certainty evidence to support the hypothesis that breast density change following endocrine therapy is a prognostic biomarker for treatment or prevention. Studies suggested a potentially large effect size with tamoxifen, but the evidence was limited. There was less evidence that breast density change following tamoxifen preventive therapy is a predictive biomarker than prognostic biomarker. Evidence for breast density change as a prognostic treatment biomarker was stronger for tamoxifen than aromatase inhibitors. There were no studies reporting mammographic density change following endocrine therapy as a predictive biomarker in the treatment setting, nor aromatase inhibitor therapy as a prognostic or predictive biomarker in the preventive setting. Further research is warranted to assess mammographic density as a biomarker for all classes of endocrine therapy and review endpoints.
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Affiliation(s)
- Emma C Atakpa
- Wolfson Institute of Population Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Mangesh A Thorat
- Wolfson Institute of Population Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
- School of Cancer & Pharmaceutical Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
- Breast Services, Guy's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Jack Cuzick
- Wolfson Institute of Population Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Adam R Brentnall
- Wolfson Institute of Population Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
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Willems S, Zaienne D, Merk D. Targeting Nuclear Receptors in Neurodegeneration and Neuroinflammation. J Med Chem 2021; 64:9592-9638. [PMID: 34251209 DOI: 10.1021/acs.jmedchem.1c00186] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nuclear receptors, also known as ligand-activated transcription factors, regulate gene expression upon ligand signals and present as attractive therapeutic targets especially in chronic diseases. Despite the therapeutic relevance of some nuclear receptors in various pathologies, their potential in neurodegeneration and neuroinflammation is insufficiently established. This perspective gathers preclinical and clinical data for a potential role of individual nuclear receptors as future targets in Alzheimer's disease, Parkinson's disease, and multiple sclerosis, and concomitantly evaluates the level of medicinal chemistry targeting these proteins. Considerable evidence suggests the high promise of ligand-activated transcription factors to counteract neurodegenerative diseases with a particularly high potential of several orphan nuclear receptors. However, potent tools are lacking for orphan receptors, and limited central nervous system exposure or insufficient selectivity also compromises the suitability of well-studied nuclear receptor ligands for functional studies. Medicinal chemistry efforts are needed to develop dedicated high-quality tool compounds for the therapeutic validation of nuclear receptors in neurodegenerative pathologies.
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Affiliation(s)
- Sabine Willems
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438 Frankfurt, Germany
| | - Daniel Zaienne
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438 Frankfurt, Germany
| | - Daniel Merk
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438 Frankfurt, Germany
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Cho SK, Kim H, Lee J, Nam E, Lee S, Choi YY, Sung YK. Effectiveness of bazedoxifene in preventing glucocorticoid-induced bone loss in rheumatoid arthritis patients. Arthritis Res Ther 2021; 23:176. [PMID: 34215316 PMCID: PMC8252248 DOI: 10.1186/s13075-021-02564-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 06/24/2021] [Indexed: 11/10/2022] Open
Abstract
Objective To evaluate the effectiveness of bazedoxifene in preventing bone loss in patients with rheumatoid arthritis (RA) receiving low-dose glucocorticoids (GCs). Methods In this randomized, controlled, open-label study, we assigned postmenopausal women with osteopenia who had been receiving low-dose GCs for RA to two groups: a group receiving bazedoxifene (20 mg/day) with elemental calcium 1200 mg and vitamin D 800 IU daily (bazedoxifene group) and a group receiving the same doses of calcium and vitamin D only (control group). As primary outcome, bone mineral density (BMD) change in the lumbar spine (L-spine) from baseline to 48 weeks was assessed. Changes in BMD in the femur, trabecular bone score, bone turnover markers, and development of fracture were assessed as secondary outcomes. For intention-to-treat analysis, 20 completed data sets were created by applying multiple imputations by chained equations. Results A total of 114 patients (57 patients in each group) were recruited. A significant increase in L-spine BMD (0.015 g/cm2, P = 0.007) was observed in the bazedoxifene group, and the increase was significantly higher than in the control group (0.013, 95% CI 0.0003–0.026, P = 0.047). Reductions in bone turnover markers in the bazedoxifene group were significantly greater than in the control group. Only one fracture was observed in the bazedoxifene group, while four fractures developed in the control group. Conclusion In postmenopausal patients with RA receiving low-dose GCs, bazedoxifene improved BMD and reduced bone turnover markers. However, the change in BMD did not exceed the least significant change. Trial registration ClinicalTrials.gov, NCT02602704. Supplementary Information The online version contains supplementary material available at 10.1186/s13075-021-02564-1.
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Affiliation(s)
- Soo-Kyung Cho
- Hanyang University Hospital for Rheumatic Diseases, 222-1 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Hyoungyoung Kim
- Hanyang University Hospital for Rheumatic Diseases, 222-1 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Jiyoung Lee
- Clinical Research Center for Rheumatoid Arthritis (CRCRA), 222 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Eunwoo Nam
- Hanyang University Hospital for Rheumatic Diseases, 222-1 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Seunghun Lee
- Department of Radiology, Hanyang University College of Medicine, 222 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Yun Young Choi
- Department of Nuclear Medicine, Hanyang University College of Medicine, 222 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea
| | - Yoon-Kyoung Sung
- Hanyang University Hospital for Rheumatic Diseases, 222-1 wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea.
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25
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Marian IR, Goff M, Williams JAE, Gulati M, Chester-Jones M, Francis A, Watson M, Vincent TL, Woollacott S, Mackworth-Young C, Glover V, Furniss D, Gardiner M, Lamb SE, Vincent K, Barber VS, Black J, Dutton SJ, Watt FE. Hand Osteoarthritis: investigating Pain Effects of estrogen-containing therapy (HOPE-e): a protocol for a feasibility randomised placebo-controlled trial. Pilot Feasibility Stud 2021; 7:133. [PMID: 34167594 PMCID: PMC8223359 DOI: 10.1186/s40814-021-00869-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 06/07/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hand osteoarthritis (OA) is a common condition, causing pain, stiffness and reduced quality of life. Incidence is higher amongst women, particularly around the age of the menopause. Whilst the relationship between sex hormones and OA has been studied in vitro, in epidemiological studies and in clinical trials of hormone replacement therapy (HRT), this study is the first to investigate the effect of estrogen-containing therapy on hand pain in post-menopausal women with symptomatic hand OA in a randomised study design. METHODS This is a feasibility study of a double-blinded placebo-controlled intervention with 1:1 randomisation to either a combination of conjugated estrogens 0.45 mg and bazedoxifene acetate 20 mg (Duavive) or placebo. The target population is post-menopausal women with symptomatic hand OA, aiming to recruit 60-90 study participants. The primary objective is to assess the feasibility of a future fully powered randomised controlled trial (RCT). Participants will take the study medication for 24 weeks and be followed up for 28 weeks after randomisation. The primary outcomes used to determine feasibility are eligible participant identification rates and routes; recruitment, randomisation and retention rates of eligible participants; study medication compliance; and the likelihood of unintentional unblinding. Secondary outcomes include measures of hand pain, function, appearance and menopausal symptoms. An end of study questionnaire and focus groups will help to refine the final protocol for a full study. DISCUSSION Identifying new treatments for symptomatic hand OA is a recognised research priority. The study will help us to understand whether there are sufficient interested and eligible individuals in this target population who would consider HRT for their hand symptoms. It will provide proof-of-concept RCT data on the effects of HRT on hand pain and other clinically relevant outcomes in this population. The study will gain valuable information on the feasibility of a full RCT and how best to run this. The findings will be published in a peer-reviewed journal and presented at a relevant conference. TRIAL REGISTRATION ISRCTN12196200 registered on 15 January 2019.
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Affiliation(s)
- Ioana R Marian
- Oxford Clinical Trials Research Unit, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS), University of Oxford, Oxford, OX3 7LD, UK.
| | - Megan Goff
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Oxford Clinical Trials Research Unit (OCTRU), Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS) University of Oxford, Oxford, OX3 7LD, UK
| | - Jennifer A E Williams
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Oxford Clinical Trials Research Unit (OCTRU), Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS) University of Oxford, Oxford, OX3 7LD, UK
| | - Malvika Gulati
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Rheumatology Department, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK
- Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Mae Chester-Jones
- Oxford Clinical Trials Research Unit, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS), University of Oxford, Oxford, OX3 7LD, UK
| | - Anne Francis
- Oxford Clinical Trials Research Unit (OCTRU), Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS) University of Oxford, Oxford, OX3 7LD, UK
| | - Marion Watson
- Oxford Clinical Trials Research Unit (OCTRU), Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS) University of Oxford, Oxford, OX3 7LD, UK
- Centre for Clinical Vaccinology and Tropical Medicine, University of Oxford, Churchill Hospital, Old Road, Oxford, OX3 7LJ, UK
| | - Tonia L Vincent
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Rheumatology Department, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK
- Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Sue Woollacott
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
| | - Charles Mackworth-Young
- Rheumatology Department, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - Victoria Glover
- White Horse Medical Practice, Faringdon Medical Centre, Oxfordshire, UK
| | - Dominic Furniss
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Matthew Gardiner
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Wexham Park Hospital, Frimley Health NHS Foundation Trust, Frimley, UK
| | - Sarah E Lamb
- Centre for Rehabilitation Research, NDORMS, University of Oxford, Oxford, UK
- College of Medicine and Health, Institute for Health Research, University of Exeter, St Luke's Campus, Heavitree Road, Exeter, EX1 2LU, UK
| | - Katy Vincent
- Nuffield Department of Women's and Reproductive Health, University of Oxford, Oxford, UK
| | - Vicki S Barber
- Oxford Clinical Trials Research Unit (OCTRU), Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS) University of Oxford, Oxford, OX3 7LD, UK
| | - Joanna Black
- Oxford Clinical Trials Research Unit (OCTRU), Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS) University of Oxford, Oxford, OX3 7LD, UK
| | - Susan J Dutton
- Oxford Clinical Trials Research Unit, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences (NDORMS), University of Oxford, Oxford, OX3 7LD, UK
| | - Fiona E Watt
- Centre for Osteoarthritis Pathogenesis Versus Arthritis, Kennedy Institute of Rheumatology, NDORMS, University of Oxford, Oxford, UK
- Rheumatology Department, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK
- Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Centre for Sport, Exercise and OA Research Versus Arthritis, University of Oxford, Oxford, UK
- Centre for Inflammatory Disease, Department of Immunology and Inflammation, Imperial College London, Commonwealth Building, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK
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Safety and clinical outcome of tamoxifen in Duchenne Muscular Dystrophy. Neuromuscul Disord 2021; 31:803-813. [PMID: 34304968 DOI: 10.1016/j.nmd.2021.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 05/13/2021] [Accepted: 05/18/2021] [Indexed: 01/25/2023]
Abstract
Patients having Duchenne Muscular Dystrophy (DMD) are currently being treated with corticosteroids, which slow down disease progression at the expense of serious adverse effects. Tamoxifen is a pro-drug some of whose metabolites interact with the nuclear estrogen receptor, leading to anti-fibrotic and muscle-protective effects as has been demonstrated in a murine model of DMD. Here we report the results from a monocentric single arm prospective study in 13 ambulant boys aged 6-14 years with genetically confirmed DMD, aimed to assess the safety of tamoxifen and its impact on disease progression. Boys were treated for up to 3 years with 20 mg/day of oral tamoxifen, in addition to their ongoing corticosteroid treatment. For 8 of these patients, outcome was compared to an age- and performance-matched 12-month natural history dataset. The primary end point was the 6-minute walk test. Secondary end points were the NorthStar assessment, timed function tests, pulmonary function, the biomarker creatine phosphokinase and adverse effects. No adverse effects were noticed other than mild gynecomastia in 4 boys. Tamoxifen-treated patients retained motor and respiratory function, compared with a significant deterioration of age-matched historical control patients receiving corticosteroids only. These encouraging findings warrant a larger clinical trial to substantiate the use of tamoxifen in Duchenne Muscular Dystrophy.
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Ping SH, Tian FM, Liu H, Sun Q, Shao LT, Lian QQ, Zhang L. Raloxifene inhibits the overexpression of TGF-β1 in cartilage and regulates the metabolism of subchondral bone in rats with osteoporotic osteoarthritis. Bosn J Basic Med Sci 2021; 21:284-293. [PMID: 33259777 PMCID: PMC8112563 DOI: 10.17305/bjbms.2020.5142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/16/2020] [Indexed: 01/18/2023] Open
Abstract
Overexpression of transforming growth factor-beta 1 (TGF-β1) and subchondral bone remodelling play key roles in osteoarthritis (OA). Raloxifene (RAL) reduces the serum level of TGF-β1 in postmenopausal women. However, the effect of RAL on TGF-β1 expression in articular cartilage is still unclear. Therefore, we aimed to investigate the protective effect of RAL on osteoporotic osteoarthritis via affecting TGF-β1 expression in cartilage and the metabolism of subchondral bone. Osteoporotic osteoarthritis was induced by a combination of anterior cruciate transection (ACLT) and ovariectomy (OVX). Rats were divided into five groups (n = 12): The sham group, the ACLT group, the OVX group, the ACLT + OVX group, and the RAL group (ACLT + OVX + RAL, 6.25 mg/kg/day for 12 weeks). Assessment was performed by histomorphology, microcomputed tomography (micro-CT) scan, immunohistochemistry, and tartrate-resistant acid phosphatase (TRAP) staining. We found that severe cartilage degeneration was shown in the ACLT + OVX group. The histomorphological scores, the levels of TGF-β1, and its related catabolic enzymes and osteoclasts numbers in the ACLT + OVX group were higher than those in other groups (p < 0.05). Furthermore, structure model index (SMI) and trabecular spacing (Tb.Sp) were decreased (p < 0.05), while bone mineral density (BMD), bone volume fraction (BV/TV), and trabecular number (Tb.N) were increased by RAL compared with the ACLT + OVX group (p < 0.05). Our findings demonstrated that RAL in clinical doses retards the development of osteoporotic osteoarthritis by inhibiting the overexpression of TGF-β1 in cartilage and regulating the metabolism of subchondral bone. These results provide support for RAL in the expansion of clinical indication for prevention and treatment in postmenopausal osteoarthritis.
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Affiliation(s)
- Shao-Hua Ping
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, China
| | - Fa-Ming Tian
- Medical Research Center, North China University of Science and Technology, Tangshan, China
| | - Hao Liu
- Department of Orthopedic Surgery, Affiliated Hospital of North China University of Science and Technology, Tangshan, China
| | - Qi Sun
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, China
| | - Li-Tao Shao
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, China
| | - Qiang-Qiang Lian
- Department of Orthopedic Surgery, the Affiliated Hospital of North China University of Science and Technology, Tangshan, China
| | - Liu Zhang
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, China; Department of Orthopedic Surgery, Emergency General Hospital, Beijing, China
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Antidementia Effects of Alternanthera philoxeroides in Ovariectomized Mice Supported by NMR-Based Metabolomic Analysis. Molecules 2021; 26:molecules26092789. [PMID: 34065080 PMCID: PMC8125874 DOI: 10.3390/molecules26092789] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 05/01/2021] [Accepted: 05/06/2021] [Indexed: 11/17/2022] Open
Abstract
The crude ethanol extract of the whole plant of Alternanthera philoxeroides (Mart.) Griseb was investigated for its potential as antidementia, induced by estrogen deprivation, based on in vitro antioxidant activity, β-amyloid aggregation inhibition and cholinesterase inhibitory activity, as well as in vivo Morris water maze task (MWMT), novel object recognition task (NORT), and Y-maze task. To better understand the effect of the extract, oxidative stress-induced brain membrane damage through lipid peroxidation in the whole brain was also investigated. Additionally, expressions of neuroinflammatory cytokines (IL-1β, IL-6 and TNF-α) and estrogen receptor-mediated facilitation genes such as PI3K and AKT mRNA in the hippocampus and frontal cortex were also evaluated. These effects were confirmed by the determination of its serum metabolites by NMR metabolomic analysis. Both the crude extract of A. philoxeroides and its flavone constituents were found to inhibit β-amyloid (Aβ) aggregation.
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Frara S, Allora A, di Filippo L, Formenti AM, Loli P, Polizzi E, Tradati D, Ulivieri FM, Giustina A. Osteopathy in mild adrenal Cushing's syndrome and Cushing disease. Best Pract Res Clin Endocrinol Metab 2021; 35:101515. [PMID: 33795196 DOI: 10.1016/j.beem.2021.101515] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pathophysiology and effects of endogenous glucocorticoid (GC) excess on skeletal endpoints as well as awareness and management of bone fragility are reviewed. Cushing's syndrome (CS) increase the risk of fracture affecting prevalently bone quality. Bone antiresorptive agents (SERMs, bisphosphonates and denosumab) as well as teriparatide increase bone mineral density and in some instances reduce fracture risk. Awareness and management of bone health in CS can be improved.
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Affiliation(s)
- Stefano Frara
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Agnese Allora
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Luigi di Filippo
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Anna Maria Formenti
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Paola Loli
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy
| | | | - Daniele Tradati
- Department of Orthopedics and Traumatology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Fabio Massimo Ulivieri
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Andrea Giustina
- Institute of Endocrine and Metabolic Sciences, Università Vita-Salute San Raffaele, IRCCS Ospedale San Raffaele, Milan, Italy.
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The short-term effects of estradiol, raloxifene, and a phytoestrogen in women with perimenopausal depression. ACTA ACUST UNITED AC 2021; 28:369-383. [PMID: 33470755 DOI: 10.1097/gme.0000000000001724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE We examined the short-term efficacies of three estrogen-like compounds under placebo-controlled conditions in women with perimenopause-related depression (PMD). METHODS Women with PMD were randomized in a double-blind parallel design to one of four treatments: transdermal 17-beta estradiol (TE) (100 mcg/d); oral raloxifene (60 mg/d); a proprietary phytoestrogen compound, Rimostil (1,000 mg twice/d); or placebo for 8 weeks. The main outcome measures were the Center for Epidemiology Studies Depression Scale, 17-item Hamilton Rating Scale for Depression (HRSD), and the Beck Depression Inventory completed at each clinic visit. Secondary outcomes included a visual analogue self-rating completed at each clinic visit, and daily self-ratings of hot flush severity. Cognitive tests were performed at pretreatment baseline and at the end of the trial. In the primary analysis, we obtained four repeated measures in each woman in the four treatment arms. Analyses were done with SAS Version 9.4 software (SAS Institute, Inc, Cary, NC), using PROC MIXED (for mixed models). All models included the following four explanatory variables, regardless of whether they were statistically significant: 1) treatment group (TE, raloxifene, Rimostil, placebo); 2) week (W2, W4, W6, W8); 3) treatment group-by-week interaction; and 4) baseline value of the measure being analyzed. The inclusion of additional variables was evaluated individually for each outcome measure. RESULTS Sixty-six women were randomized into the trial, four women dropped out of the trial, and 62 women were included in the final data analysis. No effect of treatment group was observed in either the Center for Epidemiology Studies Depression Scale (P = 0.34) or Beck Depression Inventory (P = 0.27) scores; however, there was a difference in HRSD scores between treatment groups (P = 0.0037) that pair-wise comparisons of the combined weekly scores in each treatment demonstrated TE's beneficial effects on HRSD scores compared with Rimostil (P = 0.0005), and less consistently with placebo (P = 0.099). The average (SD) of the baseline scores for each treatment group on the HRSD was as follows: TE-15.3 (4.5), raloxifene-16.0 (3.7), Rimostil-14.0 (2.7), and placebo-15.2 (3.0). Whereas the HRSD scores after 8 weeks of treatment (least-square means) were TE-5.2(1.1), raloxifene-5.8(1.2), Rimostil-11.2(1.4), and placebo-7.8(1.1). No differences were observed between raloxifene and either TE or placebo in any scale score. HRSD scores in women assigned to TE were improved compared with those on Rimostil during weeks 6 and 8 (P values = 0.0008, 0.0011, respectively). Cognitive testing at week 8 showed that none of the three active treatment groups performed better than placebo. CONCLUSIONS This study did not identify significant therapeutic benefits of TE, Rimostil, or raloxifene compared with placebo in PMD. However, improvements in depression ratings were observed between TE compared with Rimostil. Thus, our findings do not support the role of ERbeta compounds in the treatment of PMD (and indeed could suggest a more important role of ERalpha).
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Abstract
INTRODUCTION PROTACs represent a novel class of heterobifunctional molecules that simultaneously bind to a target protein and to an E3 ligase complex, resulting in the transfer of ubiquitin and initiating a process ultimately causing the proteasomal degradation of the target protein. This mechanism of action imbues PROTACs with the ability to modulate target biology in unique ways compared to inhibitors, and the development of PROTACs as therapeutic agents is expected to result in new medicines to treat multiple diseases. AREAS COVERED This review includes published PCT (WO) patent applications covering January 2013 through June 2020. Only English-language patent applications with exemplified PROTACs reported to degrade a target protein(s) were deemed in scope, and the definition of 'PROTAC' was restricted to a bifunctional molecule which contains a discrete binding element for a specific degradation target(s), as well as a separate discrete E3 ligase-binding moiety. EXPERT OPINION Delivering on the enormous potential of PROTACs will require the development of PROTAC medicines that are differentiated from traditional small-molecule inhibitors. The modular composition of PROTACs affords both opportunities and challenges in securing robust intellectual property, and we envision that requirements for novelty are likely to evolve as this area matures.
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Tingskov SJ, Jensen MS, Pedersen CET, de Araujo IBBA, Mutsaers HAM, Nørregaard R. Tamoxifen attenuates renal fibrosis in human kidney slices and rats subjected to unilateral ureteral obstruction. Biomed Pharmacother 2021; 133:111003. [PMID: 33227702 DOI: 10.1016/j.biopha.2020.111003] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/26/2020] [Accepted: 11/08/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND AND PURPOSE Renal fibrosis plays an important role in the development and progression of chronic kidney disease (CKD). Clinical studies have shown that CKD progresses differently in males and females, which may be related to circulating levels of sex hormones. In this study, we investigated the effect of tamoxifen (TAM), a selective estrogen receptor modulator (SERM), on renal fibrosis in male and female rats subjected to unilateral ureteral obstruction (UUO) and human precision-cut kidney slices (PCKS). EXPERIMENTAL APPROACH Female, ovariectomized female (OVX), and male rats were subjected to 7 days of UUO and treated with TAM by oral gavage. Moreover, we studied individual responses to TAM treatment in PCKS prepared from female and male patients. In all models, the expression of fibrosis markers was examined by western blot, qPCR, and immunohistochemistry. KEY RESULTS TAM decreased the expression of fibronectin, α-smooth muscle actin, and collagen-1 and -3 in female, OVX, and male rats. In addition, TAM mitigated TGF-β-induced fibrosis in human PCKS, irrespective of sex, yet interindividual differences in treatment response were observed. CONCLUSION AND IMPLICATIONS TAM ameliorates renal fibrosis in males and females, although we did observe sex differences in drug response. These findings warrant further research into the clinical applicability of TAM, or other SERMs, for the personalized treatment of renal disease.
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Haydar Ali Tajuddin A, Kamaruddin N, Sukor N, Azizan EA, Omar AM. Estrogen Receptors in Nonfunctioning Pituitary Neuroendocrine Tumors: Review on Expression and Gonadotroph Functions. J Endocr Soc 2020; 4:bvaa157. [PMID: 33241169 PMCID: PMC7671264 DOI: 10.1210/jendso/bvaa157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Indexed: 11/19/2022] Open
Abstract
AbstractEstrogen (17β-estradiol or E2) is a crucial regulator of the synthesis and secretion of pituitary reproductive hormones luteinizing hormone, follicle-stimulating hormone, and prolactin. In this review, we summarize the role of estrogen receptors in nonfunctioning pituitary neuroendocrine tumors (NF-Pitnets), focusing on immunoexpression and gonadotroph cell proliferation and apoptosis. Gonadotroph tumors are the most common subtype of NF-Pitnets. Two major estrogen receptor (ER) isoforms expressed in the pituitary are estrogen receptor alpha (ERα) and estrogen receptor beta (ERβ). Overall, estrogen actions are mostly exerted through the ERα isoform on the pituitary. The G protein–coupled estrogen receptor (GPER) located at the plasma membrane may contribute to nongenomic effects of estrogen. Nuclear immunoreactivity for ERα and ERβ was highest among gonadotroph and null cell tumors. Silent corticotroph tumors are the least immunoreactive for both receptors. A significantly elevated ERα expression was observed in macroadenomas compared with microadenomas. ERα and ERβ may act in opposite directions to regulate the Slug-E-cadherin pathway and to affect invasiveness of NF-Pitnets. In the cellular pathway, ERs regulate estrogen-induced proliferation and differentiation and impact several signaling pathways including the MAPK and PI3K/Akt pathway. Estrogen was the first-discovered inducer of pituitary tumor transforming gene 1 that was abundantly expressed in NF-Pitnets. ERα can be a potential biomarker for predicting tumor size and invasiveness as well as therapeutic target for NF-Pitnets. Selective estrogen receptor modulators or antiestrogen may represent as an alternative choice for the treatment of NF-Pitnets.
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Affiliation(s)
- Amalina Haydar Ali Tajuddin
- Department of Internal Medicine, Kulliyyah of Medicine, International Islamic University Malaysia, Kuantan, Pahang, Malaysia
| | - Norazmi Kamaruddin
- Endocrine Unit, Faculty of Medicine, UKM Medical Centre, Cheras, Kuala Lumpur, Malaysia
| | - Norlela Sukor
- Endocrine Unit, Faculty of Medicine, UKM Medical Centre, Cheras, Kuala Lumpur, Malaysia
| | - Elena Aisha Azizan
- Endocrine Unit, Faculty of Medicine, UKM Medical Centre, Cheras, Kuala Lumpur, Malaysia
| | - Ahmad Marzuki Omar
- Department of Internal Medicine, Kulliyyah of Medicine, International Islamic University Malaysia, Kuantan, Pahang, Malaysia
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Nameki R, Chang H, Reddy J, Corona RI, Lawrenson K. Transcription factors in epithelial ovarian cancer: histotype-specific drivers and novel therapeutic targets. Pharmacol Ther 2020; 220:107722. [PMID: 33137377 DOI: 10.1016/j.pharmthera.2020.107722] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/26/2020] [Indexed: 02/06/2023]
Abstract
Transcription factors (TFs) are major contributors to cancer risk and somatic development. In preclinical and clinical studies, direct or indirect inhibition of TF-mediated oncogenic gene expression profiles have proven to be effective in many tumor types, highlighting this group of proteins as valuable therapeutic targets. In spite of this, our understanding of TFs in epithelial ovarian cancer (EOC) is relatively limited. EOC is a heterogeneous disease composed of five major histologic subtypes; high-grade serous, low-grade serous, endometrioid, clear cell and mucinous. Each histology is associated with unique clinical etiologies, sensitivity to therapies, and molecular signatures - including diverse transcriptional regulatory programs. While some TFs are shared across EOC subtypes, a set of TFs are expressed in a histotype-specific manner and likely explain part of the histologic diversity of EOC subtypes. Targeting TFs present with unique opportunities for development of novel precision medicine strategies for ovarian cancer. This article reviews the critical TFs in EOC subtypes and highlights the potential of exploiting TFs as biomarkers and therapeutic targets.
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Affiliation(s)
- Robbin Nameki
- Women's Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Heidi Chang
- Women's Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jessica Reddy
- Women's Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Rosario I Corona
- Women's Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Kate Lawrenson
- Women's Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Center for Bioinformatics and Functional Genomics, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
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Hill RA, Kouremenos K, Tull D, Maggi A, Schroeder A, Gibbons A, Kulkarni J, Sundram S, Du X. Bazedoxifene - a promising brain active SERM that crosses the blood brain barrier and enhances spatial memory. Psychoneuroendocrinology 2020; 121:104830. [PMID: 32858306 DOI: 10.1016/j.psyneuen.2020.104830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 08/11/2020] [Indexed: 12/21/2022]
Abstract
Over 20 years of accumulated evidence has shown that the major female sex hormone 17β-estradiol can enhance cognitive functioning. However, the utility of estradiol as a therapeutic cognitive enhancer is hindered by its unwanted peripheral effects (carcinogenic). Selective estrogen receptor modulators (SERMs) avoid the unwanted effects of estradiol by acting as estrogen receptor antagonists in some tissues such as breast and uterus, but as agonists in others such as bone, and are currently used for the treatment of osteoporosis. However, understanding of their actions in the brain are limited. The third generation SERM bazedoxifene has recently been FDA approved for clinical use with an improved biosafety profile. However, whether bazedoxifene can enter the brain and enhance cognition is unknown. Using mice, the current study aimed to explore if bazedoxifene can 1) cross the blood-brain barrier, 2) rescue ovariectomy-induced hippocampal-dependent spatial memory deficit, and 3) activate neural estrogen response element (ERE)-dependent gene transcription. Using liquid chromatography-mass spectrometry (LC-MS), we firstly demonstrate that a peripheral injection of bazedoxifene can enter the brain. Secondly, we show that an acute intraperitoneal injection of bazedoxifene can rescue ovariectomy-induced spatial memory deficits. And finally, using the ERE-luciferase reporter mouse, we show in vivo that bazedoxifene can activate the ERE in the brain. The evidence shown here suggest bazedoxifene could be a viable cognitive enhancer with promising clinical applicability.
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Affiliation(s)
- R A Hill
- Department of Psychiatry, Monash University, Clayton, VIC, 3168, Australia; Florey Institute for Neuroscience and Mental Health, Parkville, VIC, 3052, Australia.
| | - K Kouremenos
- Metabolomics Australia, Bio21 Molecular Science & Biotechnology Institute, Parkville, VIC, 3052, Australia
| | - D Tull
- Metabolomics Australia, Bio21 Molecular Science & Biotechnology Institute, Parkville, VIC, 3052, Australia
| | - A Maggi
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, 20133, Italy
| | - A Schroeder
- Department of Psychiatry, Monash University, Clayton, VIC, 3168, Australia
| | - A Gibbons
- Department of Psychiatry, Monash University, Clayton, VIC, 3168, Australia
| | - J Kulkarni
- Monash Alfred Psychiatry Research Centre, Monash University, St Kilda, VIC, 3004, Australia
| | - S Sundram
- Department of Psychiatry, Monash University, Clayton, VIC, 3168, Australia
| | - X Du
- Department of Psychiatry, Monash University, Clayton, VIC, 3168, Australia; Florey Institute for Neuroscience and Mental Health, Parkville, VIC, 3052, Australia
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Vahidinia Z, Karimian M, Joghataei MT. Neurosteroids and their receptors in ischemic stroke: From molecular mechanisms to therapeutic opportunities. Pharmacol Res 2020; 160:105163. [DOI: 10.1016/j.phrs.2020.105163] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 01/09/2023]
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Lin X, Xiang H, Luo G. Targeting estrogen receptor α for degradation with PROTACs: A promising approach to overcome endocrine resistance. Eur J Med Chem 2020; 206:112689. [PMID: 32829249 DOI: 10.1016/j.ejmech.2020.112689] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/08/2020] [Accepted: 07/22/2020] [Indexed: 02/07/2023]
Abstract
Estrogen receptor alfa (ERα) is expressed in approximate 70% of breast cancer (BC) which is the most common malignancy in women worldwide. To date, the foremost intervention in the treatment of ER positive (ER+) BC is still the endocrine therapy. However, resistance to endocrine therapies remains a major hurdle in the long-term management of ER + BC. Although the mechanisms underlying endocrine resistance are complex, cumulative evidence revealed that ERα still plays a critical role in driving BC tumor cells to grow in resistance state. Fulvestrant, a selective estrogen receptor degrader (SERD), has moved to first line therapy for metastatic ER + BC, suggesting that removing ERα would be a useful strategy to overcome endocrine resistance. Proteolysis-Targeting Chimera (PROTAC) technology, an emerging paradigm for protein degradation, has the potential to eliminate both wild type and mutant ERα in breast cancer cells. Excitingly, ARV-471, an ERα-targeted PROTAC developed by Arvinas, has been in phase 1 clinical trials. In this review, we will summarize recent progress of ER-targeting PROTACs from publications and patents along with their therapeutic opportunities for the treatment of endocrine-resistant BC.
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Affiliation(s)
- Xin Lin
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Hua Xiang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| | - Guoshun Luo
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
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Chiodini I, Falchetti A, Merlotti D, Eller Vainicher C, Gennari L. Updates in epidemiology, pathophysiology and management strategies of glucocorticoid-induced osteoporosis. Expert Rev Endocrinol Metab 2020; 15:283-298. [PMID: 32584619 DOI: 10.1080/17446651.2020.1772051] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Endogenous or exogenous (corticosteroid-induced) glucocorticoids (GCs) excess represents, together with diabetes, the most common cause of secondary osteoporosis. AREAS COVERED We present a comprehensive overview about the pathophysiology, clinical management and treatment of GCs induced osteoporosis (GIOP). According to PRISMA guidelines, a literature search identifying articles about bone and GCs was done. EXPERT OPINION Despite the progress over the years and the increase in therapeutic options, there still are controversial issues about the management of GIOP. These mainly include the failure of BMD or FRAX to completely account for the rapid increase in fracture risk of most GC-treated patients, the understanding about the independent contribution on bone fragility of the underlying disease requiring GCs therapy, and the necessity of clearer information about the anti-fracture efficacy and long term-safety of most therapeutic options. Moreover, there are no specific indications for the management of bone fragility in endogenous hypercortisolism. Notwithstanding the above limitations there is a general consensus to recommend an assessment of fracture risk in all individuals >40 years committed to receive (or continuing) high dose (>7.5 mg of prednisone equivalent) GCs for ≥3 months and in all patients with fragility fracture history.
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Affiliation(s)
- Iacopo Chiodini
- Istituto Auxologico Italiano, IRCCS, Unit for Bone Metabolism Diseases and Diabetes & Lab of Endocrine and Metabolic Research, Milan , Italy
| | - Alberto Falchetti
- Istituto Auxologico Italiano, IRCCS, Unit for Bone Metabolism Diseases and Diabetes & Lab of Endocrine and Metabolic Research, Milan , Italy
| | - Daniela Merlotti
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena , Italy
| | - Cristina Eller Vainicher
- Endocrinology and Diabetology Units, Department of Medical Sciences and Community, Fondazione Ca'Granda Ospedale Maggiore Policlinico IRCCS , Milan, Italy
| | - Luigi Gennari
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena , Italy
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Brown LC, Murphy AR, Lalonde CS, Subhedar PD, Miller AH, Stevens JS. Posttraumatic stress disorder and breast cancer: Risk factors and the role of inflammation and endocrine function. Cancer 2020; 126:3181-3191. [PMID: 32374431 DOI: 10.1002/cncr.32934] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/10/2020] [Accepted: 03/23/2020] [Indexed: 12/20/2022]
Abstract
A breast cancer diagnosis can be a life-changing and stressful experience that can lead to chronic mental health conditions such as posttraumatic stress disorder (PTSD). Greater than one-third of patients initially diagnosed with PTSD after a diagnosis of breast cancer continue to have persistent or worsening PTSD symptoms after 4 years. An emerging body of literature has indicated several key environmental and biological risk factors for PTSD among survivors of breast cancer. Well-recognized risk factors include having a history of childhood trauma, being nonwhite, obesity, younger age at the time of diagnosis, diagnosis with a higher stage of breast cancer, and short time since treatment. Of the emerging risk factors related to fear circuitry in the brain, 2 pathways of particular importance are the stress-driven activation of inflammatory pathways and the long-term effect of antiendocrine therapies. These central and peripheral responses during and after stress exposure are important because increased fear and anxiety can lead to the maintenance of PTSD and worse patient outcomes. Given the poor outcomes associated with PTSD and the high prevalence of breast cancer in women, more research to identify those women at heightened risk of PTSD after breast cancer is warranted to reduce the number of diagnoses and lessen the negative impact of this chronic mental health condition.
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Affiliation(s)
- Lauren C Brown
- Emory University College of Arts and Sciences, Atlanta, Georgia, USA
| | - Amy R Murphy
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Chloe S Lalonde
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Preeti D Subhedar
- Glenn Family Breast Center, Winship Cancer Institute, Emory University, Atlanta, Georgia, USA.,Department of Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Andrew H Miller
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia, USA.,Glenn Family Breast Center, Winship Cancer Institute, Emory University, Atlanta, Georgia, USA
| | - Jennifer S Stevens
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia, USA.,Glenn Family Breast Center, Winship Cancer Institute, Emory University, Atlanta, Georgia, USA
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Bei MJ, Tian FM, Xiao YP, Cao XH, Liu N, Zheng ZY, Dai MW, Wang WY, Song HP, Zhang L. Raloxifene retards cartilage degradation and improves subchondral bone micro-architecture in ovariectomized rats with patella baja-induced - patellofemoral joint osteoarthritis. Osteoarthritis Cartilage 2020; 28:344-355. [PMID: 31326553 DOI: 10.1016/j.joca.2019.06.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 06/04/2019] [Accepted: 06/10/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Abnormal remodeling of subchondral bone (SB) induced by estrogen deficiency has been shown to be involved in osteoarthritis (OA). Raloxifene (RAL) is commonly used to treat postmenopausal osteoporosis (OP). However, little is known about its effects on OA combined with estrogen deficiency. This study was performed to evaluate the efficacy of RAL on patella baja-induced patellofemoral joint OA (PFJOA) in an ovariectomized rat model. DESIGN Patellar ligament shortening (PLS) and ovariectomy (OVX) were performed simultaneously in 3-month-old female Sprague-Dawley rats, which were treated with RAL (10 mg/kg/day) or vehicle at 72 h postoperatively for 10 weeks. PFJOA was assessed by immunohistochemistry (IHC), real-time polymerase chain reaction (PCR), tartrate-resistant acid phosphatase (TRAP) staining, enzyme-linked immunosorbent assay (ELISA), micro-computed tomography (μCT), histomorphology and behavioral analyses. RESULTS X-ray examinations showed that patella baja was successfully established by PLS. Histomorphological analysis revealed that PFJOA was significantly exacerbated by OVX and markedly alleviated by RAL. Moreover, RAL improved cartilage metabolism by decreasing MMP-13, ADAMTS-4, and caspase-3 and increasing Col-II and aggrecan at both the protein and mRNA levels. Furthermore, RAL markedly improved bone mass and SB microarchitecture and reduced osteoclast numbers and the serum osteocalcin and CTX-I levels. Although RAL showed a trend toward reducing pain sensitivity based on mechanical allodynia testing, this result was not statistically significant. CONCLUSION These findings demonstrate that RAL treatment retards PFJOA progression in an ovariectomized rat model, suggesting that it may be a potential candidate for amelioration of the progression of PFJOA accompanied by postmenopausal OP.
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Affiliation(s)
- M-J Bei
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, PR China.
| | - F-M Tian
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - Y-P Xiao
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - X-H Cao
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - N Liu
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - Z-Y Zheng
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - M-W Dai
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, PR China.
| | - W-Y Wang
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - H-P Song
- Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - L Zhang
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, PR China.
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Gennari L, Merlotti D, Falchetti A, Eller Vainicher C, Cosso R, Chiodini I. Emerging therapeutic targets for osteoporosis. Expert Opin Ther Targets 2020; 24:115-130. [PMID: 32050822 DOI: 10.1080/14728222.2020.1726889] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Introduction: Osteoporosis is a chronic, skeletal disorder characterized by compromised bone strength and increased fracture risk; it affects 50% of women and 20% of men. In the past two decades, there have been substantial improvements in the pharmacotherapy of osteoporosis which have yielded potent inhibitors of bone resorption or stimulators of bone formation.Areas covered: This review discusses newly identified targets and pathways and conceptual approaches to the prevention of multiple age-related disorders. Furthermore, it summarizes existing therapeutic strategies for osteoporosis.Expert opinion: Our enhanced understanding of bone biology and the reciprocal interactions between bone and other tissues have allowed the identification of new targets that may facilitate the development of novel drugs. These drugs will hopefully achieve the uncoupling of bone formation from resorption and possibly exert a dual anabolic and antiresorptive effect on bone. Alas, limitations regarding adherence, efficacy on nonvertebral fracture prevention and the long-term adverse events still exist for currently available therapeutics. Moreover, the efficacy of most agents is limited by the tight coupling of osteoblasts and osteoclasts; hence the reduction of bone resorption invariably reduces bone formation, and vice versa. This field is very much 'a work in progress.'
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Affiliation(s)
- Luigi Gennari
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Daniela Merlotti
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Alberto Falchetti
- Unit for Bone Metabolism Diseases and Diabetes & Lab of Endocrine and Metabolic Research, Istituto Auxologico Italiano, IRCCS, Milan, Italy
| | - Cristina Eller Vainicher
- Endocrinology and Diabetology Units, Department of Medical Sciences and Community, Fondazione Ca'Granda Ospedale Maggiore Policlinico IRCCS, Milan, Italy
| | - Roberta Cosso
- EndOsMet Villa Donatello Private Hospital, Florence, Italy
| | - Iacopo Chiodini
- Unit for Bone Metabolism Diseases and Diabetes & Lab of Endocrine and Metabolic Research, Istituto Auxologico Italiano, IRCCS, Milan, Italy
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Chiodini I, Merlotti D, Falchetti A, Gennari L. Treatment options for glucocorticoid-induced osteoporosis. Expert Opin Pharmacother 2020; 21:721-732. [PMID: 32004105 DOI: 10.1080/14656566.2020.1721467] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Glucocorticoid (GC) induced osteoporosis (GIOP) is the most common form of secondary osteoporosis. It develops in a dose and time dependent manner, due to a rapid and transient increase in bone resorption, followed by the inhibition of bone formation. AREAS COVERED In this review, the authors summarize the pathophysiology of GIOP and give discussion to the clinical management of patients taking GCs, focusing on the currently available drugs that have antiresorptive or anabolic activity on bone. EXPERT OPINION Despite the widespread use of GCs and their well-established detrimental skeletal effects, GIOP remains an under-diagnosed and under-treated condition. Indeed, the clinical management of GIOP is still debated, so that the recent guidelines differ in their indications for pharmacological intervention. Either bone mineral density (BMD) or algorithms such as FRAX do not completely account for the remarkable and rapid increase in fracture risk of most GC-treated patients. Moreover, while oral bisphosphonates remain the most used and cost-effective option, the potential increased benefits of more potent antiresorptive agents (e.g. denosumab and zoledronate) or anabolic compounds (e.g. teriparatide) warrant further investigation. Despite the above limitations, the assessment of fracture risk is recommended for all individuals committed to receiving oral GCs for 3 months or longer.
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Affiliation(s)
- Iacopo Chiodini
- Istituto Auxologico Italiano, IRCCS, Unit for Bone Metabolism Diseases and Diabetes & Lab of Endocrine and Metabolic Research , Milan, Italy
| | - Daniela Merlotti
- Department of Medicine, Surgery and Neurosciences, University of Siena , Italy
| | - Alberto Falchetti
- Istituto Auxologico Italiano, IRCCS, Unit for Bone Metabolism Diseases and Diabetes & Lab of Endocrine and Metabolic Research , Milan, Italy
| | - Luigi Gennari
- Department of Medicine, Surgery and Neurosciences, University of Siena , Italy
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Zhou L, Poon CCW, Wong KY, Cao S, Yu W, Dong X, Lee WYW, Zhang Y, Wong MS. Prenylflavonoid Icariin Induces Estrogen Response Element-Independent Estrogenic Responses in a Tissue-Selective Manner. J Endocr Soc 2019; 4:bvz025. [PMID: 32051921 PMCID: PMC7007805 DOI: 10.1210/jendso/bvz025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 11/23/2019] [Indexed: 02/07/2023] Open
Abstract
Icariin, a flavonoid phytoestrogen derived from Herba epimedii, has been reported to exert estrogenic effects in bone and activate phosphorylation of estrogen receptor (ER) α in osteoblastic cells. However, it is unclear whether icariin selectively exerts estrogenic activities in bone without inducing undesirable effects in other estrogen-sensitive tissues. The present study aimed to investigate the tissue-selective estrogenic activities of icariin in estrogen-sensitive tissues in vivo and in vitro. Long-term treatment with icariin effectively prevented bone of ovariectomized (OVX) rats from estrogen deficiency–induced osteoporotic changes in bone structure, bone mineral density, and trabecular properties. Moreover, icariin regulated the transcriptional events of estrogen-responsive genes related to bone remodeling and prevented dopaminergic neurons against OVX-induced changes by rescuing expression of estrogen-regulated tyrosine hydroxylase and dopamine transporter in the striatum. Unlike estrogen, icariin did not induce estrogenic effects in the uterus and breast in mature OVX rats or immature CD-1 mice. In vitro studies demonstrated that icariin exerted estrogen-like activities and regulated the expression of estrogen-responsive genes but did not induce estrogen response element–dependent luciferase activities in ER-positive cells. Our results support the hypothesis that icariin, through its distinct mechanism of actions in activating ER, selectively exerts estrogenic activities in different tissues and cell types.
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Affiliation(s)
- Liping Zhou
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China
| | - Christina Chui-Wa Poon
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China
| | - Ka-Ying Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China
| | - Sisi Cao
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China
| | - Wenxuan Yu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China
| | - Xiaoli Dong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China.,State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China
| | - Wayne Yuk-Wai Lee
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, PR China
| | - Yan Zhang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, PR China
| | - Man-Sau Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China.,State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China
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A Selective Ligand for Estrogen Receptor Proteins Discriminates Rapid and Genomic Signaling. Cell Chem Biol 2019; 26:1692-1702.e5. [PMID: 31706983 DOI: 10.1016/j.chembiol.2019.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 09/05/2019] [Accepted: 10/18/2019] [Indexed: 12/27/2022]
Abstract
Estrogen exerts extensive and diverse effects throughout the body of women. In addition to the classical nuclear estrogen receptors (ERα and ERβ), the G protein-coupled estrogen receptor GPER is an important mediator of estrogen action. Existing ER-targeted therapeutic agents act as GPER agonists. Here, we report the identification of a small molecule, named AB-1, with the previously unidentified activity of high selectivity for binding classical ERs over GPER. AB-1 also possesses a unique functional activity profile as an agonist of transcriptional activity but an antagonist of rapid signaling through ERα. Our results define a class of small molecules that discriminate between the classical ERs and GPER, as well as between modes of signaling within the classical ERs. Such an activity profile, if developed into an ER antagonist, could represent an opportunity for the development of first-in-class nuclear hormone receptor-targeted therapeutics for breast cancer exhibiting reduced acquired and de novo resistance.
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Burguete MC, Jover-Mengual T, López-Morales MA, Aliena-Valero A, Jorques M, Torregrosa G, Alborch E, Castelló-Ruiz M, Salom JB. The selective oestrogen receptor modulator, bazedoxifene, mimics the neuroprotective effect of 17β-oestradiol in diabetic ischaemic stroke by modulating oestrogen receptor expression and the MAPK/ERK1/2 signalling pathway. J Neuroendocrinol 2019; 31:e12751. [PMID: 31127971 DOI: 10.1111/jne.12751] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/10/2019] [Accepted: 05/22/2019] [Indexed: 12/16/2022]
Abstract
Because neuroprotection in stroke should be revisited in the era of recanalisation, the present study analysed the potential neuroprotective effect of the selective oestrogen receptor modulator, bazedoxifene acetate (BZA), in an animal model of diabetic ischaemic stroke that mimics thrombectomy combined with adjuvant administration of a putative neuroprotectant. Four weeks after induction of diabetes (40 mg kg-1 streptozotocin, i.p.), male Wistar rats were subjected to transient middle cerebral artery occlusion (intraluminal thread technique, 60 minutes) and assigned to one of three groups treated with either: vehicle, BZA (3 mg kg-1 day-1 , i.p.) or 17β-oestradiol (E2 ) (100 μg kg-1 day-1 , i.p.). At 24 hours post-ischaemia-reperfusion, brain damage (neurofunctional score, infarct size and apoptosis), expression of oestrogen receptors (ER)α, ERβ and G protein-coupled oestrogen receptor), and activity of the mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK)1/2 and phosphoinositide 3-kinase/Akt pathways were analysed. At 24 hours after the ischaemic insult, both BZA- and E2 -treated animals showed lower brain damage in terms of improved neurofunctional condition, decreased infarct size and decreased apoptotic cell death. Ischaemia-reperfusion induced a significant decrease in ERα and ERβ expression without affecting that of G protein-coupled oestrogen receptor, whereas BZA and E2 reversed such a decrease. The ischaemic insult up-regulated the activity of both the MAPK/ERK1/2 and phosphoinositide 3-kinase/Akt pathways; BZA and E2 attenuated the increased activity of the ERK1/2 pathway, without affecting that of the Akt pathway. The results of the present study lend further support to the consideration of BZA as an effective and safer alternative overcoming the drawbacks of E2 with respect to improving diabetic ischaemic stroke outcome after successful reperfusion.
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Affiliation(s)
- María C Burguete
- Departamento de Fisiología, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - Teresa Jover-Mengual
- Departamento de Fisiología, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - Mikahela A López-Morales
- Hospital Universitari i Politècnic La Fe, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - Alicia Aliena-Valero
- Hospital Universitari i Politècnic La Fe, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - María Jorques
- Departamento de Fisiología, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - Germán Torregrosa
- Hospital Universitari i Politècnic La Fe, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - Enrique Alborch
- Departamento de Fisiología, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - María Castelló-Ruiz
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
| | - Juan B Salom
- Departamento de Fisiología, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
- Hospital Universitari i Politècnic La Fe, Unidad Mixta de Investigación Cerebrovascular, Instituto de Investigación Sanitaria La Fe - Universidad de Valencia, Valencia, Spain
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Burkhardt C, Bühler L, Tihy M, Morel P, Forni M. Bazedoxifene as a novel strategy for treatment of pancreatic and gastric adenocarcinoma. Oncotarget 2019. [DOI: 10.18632/oncotarget.26833] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Claudia Burkhardt
- Service de chirurgie viscérale, Département de chirurgie, Hôpitaux Universitaires de Genève, 1211 Genève, Switzerland
| | - Leo Bühler
- Service de chirurgie viscérale, Département de chirurgie, Hôpitaux Universitaires de Genève, 1211 Genève, Switzerland
| | - Matthieu Tihy
- Département diagnostique Service de pathologie clinique, Hôpitaux Universitaires de Genève, 1211 Genève, Switzerland
| | - Philippe Morel
- Service de chirurgie viscérale, Département de chirurgie, Hôpitaux Universitaires de Genève, 1211 Genève, Switzerland
| | - Michel Forni
- Clinique de Carouge, Réseau la Tour, Avenue Cardinal Mermillod 1, 1227 Carouge, Switzerland
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De Oliveira Andrade F, Yu W, Zhang X, Carney E, Hu R, Clarke R, FitzGerald K, Hilakivi-Clarke L. Effects of Jaeumkanghwa-tang on tamoxifen responsiveness in preclinical ER+ breast cancer model. Endocr Relat Cancer 2019; 26:339-353. [PMID: 30640711 PMCID: PMC6365679 DOI: 10.1530/erc-18-0393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 01/14/2019] [Indexed: 12/14/2022]
Abstract
Resistance to endocrine therapy remains a clinical challenge in the treatment of estrogen receptor-positive (ER+) breast cancer. We investigated if adding a traditional Asian herbal mixture consisting of 12 herbs, called Jaeumkanghwa-tang (JEKHT), to tamoxifen (TAM) therapy might prevent resistance and recurrence in the ER+ breast cancer model of 7,12-dimethylbenz[a]anthracene (DMBA)-exposed Sprague-Dawley rats. Rats were divided into four groups treated as follows: 15 mg/kg TAM administered via diet as TAM citrate (TAM only); 500 mg/kg JEKHT administered via drinking water (JEKHT only group); TAM + JEKHT and no treatment control group. The study was replicated using two different batches of JEKHT. In both studies, a significantly higher proportion of ER+ mammary tumors responded to TAM if animals also were treated with JEKHT (experiment 1: 47% vs 65%, P = 0.015; experiment 2: 43% vs 77%, P < 0.001). The risk of local recurrence also was reduced (31% vs 12%, P = 0.002). JEKHT alone was mostly ineffective. In addition, JEKHT prevented the development of premalignant endometrial lesions in TAM-treated rats (20% in TAM only vs 0% in TAM + JEKHT). Co-treatment of antiestrogen-resistant LCC9 human breast cancer cells with 1.6 mg/mL JEKHT reversed their TAM resistance in dose-response studies in vitro. Several traditional herbal medicine preparations can exhibit anti-inflammatory properties and may increase anti-tumor immune activities in the tumor microenvironment. In the tumors of rats treated with both JEKHT and TAM, expression of Il-6 (P = 0.03), Foxp3/T regulatory cell (Treg) marker (P = 0.033) and Tgfβ1 that activates Tregs (P < 0.001) were significantly downregulated compared with TAM only group. These findings indicate that JEKHT may prevent TAM-induced evasion of tumor immune responses.
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MESH Headings
- 9,10-Dimethyl-1,2-benzanthracene/toxicity
- Animals
- Antineoplastic Agents, Hormonal/administration & dosage
- Breast Neoplasms/chemically induced
- Breast Neoplasms/drug therapy
- Breast Neoplasms/pathology
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Cytokines/blood
- Drug Resistance, Neoplasm/drug effects
- Endometrium/drug effects
- Endometrium/pathology
- Estrogen Antagonists/administration & dosage
- Female
- Forkhead Transcription Factors/genetics
- Humans
- Mammary Neoplasms, Experimental
- Medicine, East Asian Traditional
- Neoplasm Recurrence, Local/prevention & control
- Plant Extracts/administration & dosage
- Plant Extracts/pharmacology
- Rats
- Rats, Sprague-Dawley
- Receptors, Estrogen/metabolism
- Tamoxifen/administration & dosage
- Transforming Growth Factor beta1/genetics
- Tumor Microenvironment/drug effects
- Tumor Microenvironment/immunology
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Affiliation(s)
| | - Wei Yu
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
| | - Xiyuan Zhang
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
| | - Elissa Carney
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
| | - Rong Hu
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
| | - Robert Clarke
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
| | - Kevin FitzGerald
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
| | - Leena Hilakivi-Clarke
- Department of Oncology, Georgetown University, Washington, District of Columbia, USA
- Correspondence should be addressed to L Hilakivi-Clarke:
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Hannen R, Steffani M, Voellger B, Carl B, Wang J, Bartsch JW, Nimsky C. Effects of anti-estrogens on cell invasion and survival in pituitary adenoma cells: A systematic study. J Steroid Biochem Mol Biol 2019; 187:88-96. [PMID: 30439415 DOI: 10.1016/j.jsbmb.2018.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 11/08/2018] [Indexed: 10/27/2022]
Abstract
Although the molecular mechanisms underlying the formation of pituitary adenomas are largely unknown, it is clear that estrogen plays a key role in the pathogenesis of pituitary adenomas. Though this is exemplified by an investigation of fulvestrant in the pituitary adenoma cell line GH3, no systematic studies on the effects of selective estrogen receptor modulators (SERMs) on functional properties of pituitary adenoma cell lines to modulate cell migration, cell invasion, and cell survival are available. Here we analyzed the effects of fulvestrant and three SERMs, bazedoxifene, clomifene, and raloxifene, on pituitary adenomas cell lines AtT20, TtT/GF, and GH3. In cell survival assays, clomifene was shown to be the most potent compound in all three cell lines with IC50 values ranging between 2, 6, and 10 μM, respectively, depending on the cell type. Raloxifene and bazedoxifene were also effective but to a lower extent. Also, all SERMs affected migratory and invasive behavior of pituitary adenoma cells. Mechanistically, treatment of cells with SERMs caused cell apoptosis, as demonstrated by Caspase 3/7 activity and western blot assays. In addition, western blots demonstrate activation of p53 in TtT/GF cells and loss of ERK1/2 activation in AtT20 cells. In contrast, fulvestrant was only effective in GH3 cells. Thus, the general applicability of SERMs for pituitary adenoma cells might be promising in clinical applications for the treatment of pituitary adenomas.
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Affiliation(s)
- Ricarda Hannen
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany
| | - Marcella Steffani
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany
| | - Benjamin Voellger
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany
| | - Barbara Carl
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany
| | - Junwen Wang
- Department of Neurosurgery, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology Wuhan, Hubei, People's Republic of China
| | - Jörg W Bartsch
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany.
| | - Christopher Nimsky
- Department of Neurosurgery, Philipps University Marburg, Baldingerstr, 35033, Marburg, Germany
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Sá SI, Maia J, Bhowmick N, Silva SM, Silva A, Correia-da-Silva G, Teixeira N, Fonseca BM. Uterine histopathological changes induced by acute administration of tamoxifen and its modulation by sex steroid hormones. Toxicol Appl Pharmacol 2019; 363:88-97. [DOI: 10.1016/j.taap.2018.11.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 11/07/2018] [Accepted: 11/28/2018] [Indexed: 11/24/2022]
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Abiramasundari G, Mohan Gowda CM, Sreepriya M. Selective Estrogen Receptor Modulator and prostimulatory effects of phytoestrogen β-ecdysone in Tinospora cordifolia on osteoblast cells. J Ayurveda Integr Med 2018; 9:161-168. [PMID: 30166229 PMCID: PMC6148058 DOI: 10.1016/j.jaim.2017.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/26/2017] [Accepted: 04/07/2017] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Indian ethnomedicine acclaims Tinosporacordifolia as a bone strengthening agent and prescribes it for the treatment of bone fractures, gout and other inflammatory diseases of the bone. OBJECTIVE (a) To understand the potential of T. cordifolia to act as a Selective Estrogen Receptor Modulator (SERM) on in vitro models. (b) To understand the toxic effects (if any) of T. cordifolia in vivo. (c) To understand the effects of β-ecdysone (proposed osteoprotective principle of T. cordifolia) on the growth of human osteoblast-like cells MG-63 and rat primary culture of osteoblasts. (d) To conduct phytochemical analysis on T. cordifolia extract to confirm the presence of β-ecdysone. MATERIALS AND METHODS The role of T. cordifolia as SERM was analyzed by investigating the effect of the extract on the growth of MCF-7 and HeLa cells. The effects of T. cordifolia in vivo was studied by biochemical (Liver function and renal function tests) and histopathological (Hematoxylin/Eosin staining) analysis. Phytochemical analysis of T.cordifolia was carried out by performing FT-IR and LC-ESI-MS analysis. RESULTS (a) T. cordifolia extract exerted non-estrogenic effects on MCF-7 and HeLa cells implicating its role as SERM. (b) High doses of T. cordifolia extract (750 and 1000 mg/kg body wt.) showed impairment of hepatic and renal function, induced pathological alterations in hepatic and renal architecture in albino rats. (c) β-ecdysone an ecdysteroid proposed as the osteoprotective principle of T. cordifolia exhibited significant prostimulatory effects on osteoblast cells and rat primary osteoblasts. (d) Phytochemical analysis confirmed the presence of β-ecdysone in alcoholic extract of T. cordifolia extract substantiating its role as the osteoprotective principle of T. cordifolia. CONCLUSION (a) T. cordifolia could function as SERM and can have applications in the therapy of osteoporosis. (b) β-ecdysone is the osteoprotective principle of T. cordifolia.
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Affiliation(s)
- Ganesan Abiramasundari
- Department of Microbiology and Biotechnology, Bangalore University, Jnana Bharathi Campus, Bengaluru, 560 056, Karnataka, India
| | - C M Mohan Gowda
- Department of Microbiology and Biotechnology, Bangalore University, Jnana Bharathi Campus, Bengaluru, 560 056, Karnataka, India
| | - Meenakshisundaram Sreepriya
- Department of Microbiology and Biotechnology, Bangalore University, Jnana Bharathi Campus, Bengaluru, 560 056, Karnataka, India.
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