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Sadwal S, Bharati S, Dar ZA, Kaur S. Chemopreventive potential of hydroethanolic Murraya koenigii leaves extract against DMBA induced breast carcinogenesis: In-silico and in-vivo study. J Ethnopharmacol 2024; 319:117124. [PMID: 37678421 DOI: 10.1016/j.jep.2023.117124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/28/2023] [Accepted: 09/03/2023] [Indexed: 09/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Murraya koenigii (MK), a member of the Rutaceae family and widely known as the curry-leaf tree, is indigenous to India, Sri Lanka, and other south Asian nations. It is a renowned medicinal herb because of the wide range of bioactive components found in its leaves, such as girinimbine, koenimbine, mahanimbine and mahanine among others. All these bioactive components make this plant beneficial for treating a variety of ailments and diseases. Biological and pharmacological activities of MK include anti-oxidant, anti-microbial, anti-ulcer, anti-helminthic, anti-malarial, anti-trichomonal, hepatoprotective, anti-diabetic, etc. AIM OF THE STUDY: The present study aimed to evaluate the possible protective effect of hydroethanolic Murraya koenigii leaves extract (HEMKLE) against 7,12-Dimethylbenz[a]anthracene (DMBA)-induced breast cancer in rats, which further paves the way for future breast cancer treatment. MATERIALS AND METHODS For the preparation of hydroethanolic Murraya koenigii leaves extract (HEMKLE), Murraya koenigii (MK) leaves were taken from the botanical garden of the Panjab University campus, Chandigarh, and authenticated from the Department of Botany, Panjab University (accession number 22417). The phytochemical characterization of HEMKLE was performed using liquid chromatography-mass spectrometry (LC-MS). Following this, an in-silico molecular docking analysis was performed using Maestro Schrodinger software, and an in-vivo study was conducted. For the in-vivo study, female SD rats were divided into four different groups. Group I (C), Group II (DMBA), Group III (HEMKLE), and Group IV (HEMKLE + DMBA). Histopathogy, oxidative and antioxidant status, immunohistochemistry of estrogen receptor-α, TUNEL assays, mRNA and protein expression of apoptotic pathway genes were conducted in in-vivo study. RESULTS In LC-MS, major phytochemical constituents including flavonoids and carbazole alkaloids were identified. In-silico docking study revealed the strong binding affinity between the identified compounds with caspase-3. Additionally, koenine displayed the highest binding affinity/minimum energy of -9.21 kcal/mol with 6BDV as compared to other phytochemicals. Furthermore, in-vivo experimentation revealed that HEMKLE administration in Group IV(HEMKLE + DMBA) significantly inhibits the tumor incidence and volume as compared to alone DMBA treated group. The antioxidant action of HEMKLE was proven from the in-vivo analysis of antioxidant marker enzymes, histopathology, immunohistochemistry of ER-α studies. Further, increase number of TUNEL positive cells was observed in co-treated animals as compared to alone DMBA treated animals. In Group IV (HEMKLE + DMBA), upregulated expression of pro-apoptotic genes and downregulated expression of anti-apoptotic gene were observed when compared to Group II(DMBA) suggested the apoptotic effect of HEMKLE. CONCLUSION The results of the present study provide clear evidence of the chemopreventive capabilities of HEMKLE in rats with DMBA-induced breast cancer. The observed outcomes could potentially be attributed to the existence of diverse phytochemicals within the HEMKLE.
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Affiliation(s)
- Shilpa Sadwal
- Department of Biophysics, Panjab University, Chandigarh, India.
| | - Sanjay Bharati
- Manipal College of Health Profession, Manipal Academy of Higher Education, Karnataka, India.
| | - Zahid Ahmad Dar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India.
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Liu Y, Chen J, Lu Z, Chang X, Wang P, Ma H, Chen X, Mo S, Lv Z, Mao X, Zong L, Yu S, Chen J. Clinicopathological analysis of patients with molecularly confirmed stage I adult granulosa cell tumors and prediction of recurrence. Gynecol Oncol 2023; 176:106-114. [PMID: 37481922 DOI: 10.1016/j.ygyno.2023.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/06/2023] [Accepted: 07/11/2023] [Indexed: 07/25/2023]
Abstract
OBJECTIVE Adult granulosa cell tumors (AGCTs) are rare malignancies that accounts for approximately 1% of ovarian neoplasms. As there are currently no well-recognized models for predicting relapse-free survival (RFS), we performed a clinicopathological analysis to identify risk factors for AGCT recurrence. METHODS We investigated 130 patients with pathologically diagnosed AGCT as confirmed by the presence of the characteristic FOXL2 C402G mutation. RESULTS Most patients had International Federation of Gynecology and Obstetrics stage I disease (n = 122, 95.3%). The 10-year RFS rate was 31.4% (22/70) and mean 10-year RFS was 74.4 (95% CI, 65.2-83.7) months. Ten patients experienced recurrence beyond the 10-year follow-up period. Undergoing fertility sparing surgery, an estrogen receptor-α (ERα) score (>0.25), and a Ki-67 index >15% were independent risk factors for recurrence in patients with stage I disease (bias-corrected C-index: 0.776). We constructed a nomogram with well-fitting calibration plots; the areas under the curve (AUCs) for 5-, and 10-year RFS prediction were 0.883 and 0.906 respectively. A simplified model with 3 predictive factors (ERα score, Ki-67 index, and primary surgical procedure) and 2 risk stratification subgroups (low- and high-risk) was constructed; its AUCs for 5-, and 10-year RFS prediction were 0.825 and 0.850 respectively. Kaplan-Meier survival curves showed significant differences in 10-year RFS between the low- and high-risk groups (p < 0.001). CONCLUSIONS The type of primary surgical procedure, ERα score, and Ki-67 index are independent predictors of recurrence for patients with stage I AGCT. Our predictive model based on these factors showed good performance.
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Affiliation(s)
- Yilin Liu
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Jingci Chen
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Zhaohui Lu
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xiaoyan Chang
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Pengyan Wang
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Heng Ma
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xianlong Chen
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Shengwei Mo
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Zhuoyao Lv
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xinxin Mao
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Liju Zong
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Shuangni Yu
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
| | - Jie Chen
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
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Shanmugarajan D, Biju A, Sibi D, Sibi R, Shaji M, David C. Dynamacophore model for breast cancer estrogen receptor alpha as an effective lead generation screening technique. J Biomol Struct Dyn 2023; 41:13029-13040. [PMID: 37154819 DOI: 10.1080/07391102.2023.2203245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 01/11/2023] [Indexed: 05/10/2023]
Abstract
Regardless to overwhelming quantum of cancer research worldwide, there are few drugs on the market to treat disease conditions. This is owing to multiple process inferences of drug targets in integrated pathways for invasion, growth, and metastasis. Over the past years, the death rate due to breast cancer has been increasing, that set the stage for improved better treatment. Therefore, there is a persistent and vital demand for innovative development of drugs to treat breast cancer. Many studies have reported that more than 60% of breast cancers are Estrogen receptor-α (ERα)-positive tumours and a key transcription factor, Estrogen receptor-α (ERα) was believed to promote proliferation of breast cancer cells. In this study, 150 ns of molecular dynamics was performed for protein-ligand complex to retrieve the potential stable conformations. The most populated dynamics cluster of 4-Hydroxytamoxifen intact with active site amino acid was selected to generate dynamacophore model (dynamic pharmacophore). Further, internal model validation with AU-ROC values ∼0.93 indicate the best model to screen library. The refined hits are funnelled in pharmacokinetics/dynamics, CDOCKER molecular docking, MM-GBSA and density functional theory to identify the promising ERα ligand candidates.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Dhivya Shanmugarajan
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Guntur, Andhra Pradesh, India
| | - Anagha Biju
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Guntur, Andhra Pradesh, India
| | - Dona Sibi
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Guntur, Andhra Pradesh, India
| | - Rona Sibi
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Guntur, Andhra Pradesh, India
| | - Maria Shaji
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Guntur, Andhra Pradesh, India
| | - Charles David
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Guntur, Andhra Pradesh, India
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Chen J, Liu J, Zeng P, Zhao C, Liu X, Sun J, Wang J, Fang P, Chen W, Ding J. Estrogen and BRCA1 deficiency synergistically induce breast cancer mutation-related DNA damage. Biochem Biophys Res Commun 2022; 613:140-145. [PMID: 35561581 DOI: 10.1016/j.bbrc.2022.04.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 04/30/2022] [Indexed: 02/08/2023]
Abstract
Estrogen (E2) is crucial for the development of breast cancer caused by BRCA1 mutation, and can increase the DNA damage in BRCA1-deficient cells. However, the mechanisms through which BRCA1 deficiency and E2 synergistically induce DNA damage remains unclear. In this study, we analyzed the distribution of DNA damage in E2-treated BRCA1-deficient cells. We detected DNA lesions in the vicinity of genes that are transcriptionally activated by estrogen receptor-α (ER). Loss of BRCA1 altered chromatin binding by ER, which significantly affected the distribution of DNA damage. Moreover, these changes were associated with the established mutations in BRCA1-mutant breast cancer. Taken together, our findings reveal a new mechanism underlying the DNA damage in breast cancer cells that is synergistically induced by BRCA1 deficiency and E2.
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Affiliation(s)
- Jiahao Chen
- Vaccine Research Institute, The Third Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, 510630, China; Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jingxin Liu
- Vaccine Research Institute, The Third Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, 510630, China; Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Pengguihang Zeng
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Cai Zhao
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xinyi Liu
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jun Sun
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jia Wang
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China; Guangzhou Medical University-Guangzhou Institute of Biomedicine and Health Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Peihang Fang
- Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Wenjie Chen
- Vaccine Research Institute, The Third Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, 510630, China.
| | - Junjun Ding
- Vaccine Research Institute, The Third Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, 510630, China; Advanced Medical Technology Center, The First Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510630, China; Department of Cell Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China; West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, 610041, China.
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Wang N, Zhang X, Rothrauff BB, Fritch MR, Chang A, He Y, Yeung M, Liu S, Lipa KE, Lei G, Alexander PG, Lin H. Novel role of estrogen receptor-α on regulating chondrocyte phenotype and response to mechanical loading. Osteoarthritis Cartilage 2022; 30:302-314. [PMID: 34767957 DOI: 10.1016/j.joca.2021.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 02/09/2023]
Abstract
OBJECTIVE In knee cartilage from patients with osteoarthritis (OA), both preserved cartilage and damaged cartilage are observed. In this study, we aim to compare preserved with damaged cartilage to identify the molecule(s) that may be responsible for the mechanical loading-induced differences within cartilage degradation. METHODS Preserved and damaged cartilage were harvested from the same OA knee joint. RNA Sequencing was performed to examine the transcriptomic differences between preserved and damaged cartilage cells. Estrogen receptor-α (ERα) was identified, and its function of was tested through gene knockin and knockout. The role of ERα in mediating chondrocyte response to mechanical loading was examined via compression of chondrocyte-laded hydrogel in a strain-controlled manner. Findings from the studies on human samples were verified in animal models. RESULTS Level of estrogen receptor α (ERα) was significantly reduced in damaged cartilage compared to preserved cartilage, which were observed in both human and mice samples. Knockdown of ESR1, the gene encoding ERα, resulted in an upregulation of senescence- and OA-relevant markers in chondrocytes. Conversely, knockin of ESR1 partially reversed the osteoarthritic and senescent phenotype of OA chondrocytes. Using a three-dimensional (3D) culture model, we demonstrated that mechanical overload significantly suppressed ERα level in chondrocytes with concomitant upregulation of osteoarthritic phenotype. When ESR1 expression was suppressed, mechanical loading enhanced hypertrophic and osteogenic transition. CONCLUSION Our study demonstrates a new estrogen-independent role of ERα in mediating chondrocyte phenotype and its response to mechanical loading, and suggests that enhancing ERα level may represent a new method to treat osteoarthritis.
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Affiliation(s)
- N Wang
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Orthopaedic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China; Xiangya Third Hospital, Central South University, Changsha, Hunan, China.
| | - X Zhang
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Orthopaedic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China; Xiangya Third Hospital, Central South University, Changsha, Hunan, China.
| | - B B Rothrauff
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
| | - M R Fritch
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
| | - A Chang
- Department of Bioinformatics, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
| | - Y He
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Orthopaedic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China; Xiangya Third Hospital, Central South University, Changsha, Hunan, China.
| | - M Yeung
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Bioengineering, University of Pittsburgh Swanson School of Engineering, 15219, USA.
| | - S Liu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
| | - K E Lipa
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Bioengineering, University of Pittsburgh Swanson School of Engineering, 15219, USA.
| | - G Lei
- Department of Orthopaedic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China.
| | - P G Alexander
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
| | - H Lin
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Bioengineering, University of Pittsburgh Swanson School of Engineering, 15219, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
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Liu JB, Li ZF, Lu L, Wang ZY, Wang L. Glyphosate damages blood-testis barrier via NOX1-triggered oxidative stress in rats: Long-term exposure as a potential risk for male reproductive health. Environ Int 2022; 159:107038. [PMID: 34906888 DOI: 10.1016/j.envint.2021.107038] [Citation(s) in RCA: 89] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/11/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Blood-testis barrier (BTB) creates a privileged niche indispensable for spermatogenesis. Glyphosate (GLY), the most commonly used herbicide worldwide, has been reported to decrease sperm quality. However, whether and how GLY destroys the BTB to affect sperm quality remains to be elucidated. Herein, this study was designed to investigate the influence of GLY on the BTB in vivo and in vitro experiments. The results showed that male rats exposed to GLY for 4 months exhibited a decrease in sperm quality and quantity, accompanied by BTB integrity disruption and testicular oxidative stress. Additionally, GLY-induced reactive oxygen species (ROS) contributed to the downregulation of BTB-related proteins in primary Sertoli cells (SCs). Intriguingly, we identified a marked upregulation of oxidative stress-related gene NOX1 in GLY-exposed testis based on transcriptome analysis. NOX1 knockdown blocked the GLY-induced oxidative stress, as well as prevented BTB-related protein decrease in SCs. Furthermore, the estrogen receptor (ER)-α was significantly upregulated in vivo and in vitro models. An ER-α inhibitor decreased the expression levels of both ER-α and NOX1. Mechanistically, GLY directly interacted with ER-α at the site of Pro39 and Lys401 to promote ER-α activation, which boosted NOX1 expression to trigger ROS accumulation. Collectively, these results demonstrate that long-term GLY exposure adversely affects BTB integrity, which disrupts spermatogenesis via activation of ER-α/NOX1 axis. This study presents a better understanding of the risk of long-term GLY exposure to male fertility.
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Affiliation(s)
- Jing-Bo Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China
| | - Zi-Fa Li
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan City 250355, Shandong Province, China
| | - Lu Lu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China
| | - Zhen-Yong Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China
| | - Lin Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City 271018, Shandong Province, China.
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Sang C, Song Y, Jin TW, Zhang S, Fu L, Zhao Y, Zou X, Wang Z, Gao H, Liu S. Bisphenol A induces ovarian cancer cell proliferation and metastasis through estrogen receptor-α pathways. Environ Sci Pollut Res Int 2021; 28:36060-36068. [PMID: 33683587 DOI: 10.1007/s11356-021-13267-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Bisphenol A (BPA) is a widely used raw material that can be detected both in the environment and in the human body. Due to its estrogen-like effects, wide concerns have been raised about the potential role of BPA in the initiation and development of hormone-dependent cancers. Ovarian cancer is the most common reproductive system cancer and has a high mortality rate in women. Despite recent investigations into BPA's carcinogenic effects, studies on its role in ovarian cancer development remain limited. In this study, we aimed to assess the effect of BPA at various environmentally relevant concentrations on proliferation and metastasis of ovarian cancer cells. We discovered that BPA can stimulate proliferation of OVCAR-3 ovarian cancer cells after exposure for up to 5 days. Strikingly, BPA enhanced ovarian cancer cell migration, invasion, and adhesion (to vascular endothelial cells) through upregulation of matrix metalloproteinase-2 (MMP-2), MMP-9, and intercellular cell adhesion molecule-1 (IMAC-1). The stimulatory effects of BPA on cancer cell proliferation and metastasis were reversed by treatment with an ERα inhibitor, but not by treatment with an ERβ inhibitor. Together, these results suggest that BPA induces proliferation and metastasis of ovarian cancer cells through ERα signaling pathways. This study provides new insights into the carcinogenic effects of BPA with regard to ovarian cancer.
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Affiliation(s)
- Chen Sang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Yu Song
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, Heilongjiang Province, China
| | - Tong-Wang Jin
- School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Shuo Zhang
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Linyan Fu
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Yi Zhao
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Xinxin Zou
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Zhe Wang
- School of Public Health, Xinxiang Medical University, Xinxiang, 453003, Henan Province, China.
| | - Hui Gao
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China.
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing, 100085, China
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Chu C, Gao X, Li X, Zhang X, Ma R, Jia Y, Li D, Wang D, Xu F. Involvement of Estrogen Receptor-α in the Activation of Nrf2-Antioxidative Signaling Pathways by Silibinin in Pancreatic β-Cells. Biomol Ther (Seoul) 2020; 28:163-171. [PMID: 31649209 PMCID: PMC7059807 DOI: 10.4062/biomolther.2019.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/18/2019] [Accepted: 09/04/2019] [Indexed: 01/10/2023] Open
Abstract
Silibinin exhibits antidiabetic potential by preserving the mass and function of pancreatic β-cells through up-regulation of estrogen receptor-α (ERα) expression. However, the underlying protective mechanism of silibinin in pancreatic β-cells is still unclear. In the current study, we sought to determine whether ERα acts as the target of silibinin for the modulation of antioxidative response in pancreatic β-cells under high glucose and high fat conditions. Our in vivo study revealed that a 4-week oral administration of silibinin (100 mg/kg/day) decreased fasting blood glucose with a concurrent increase in levels of serum insulin in high-fat diet/streptozotocin-induced type 2 diabetic rats. Moreover, expression of ERα, NF-E2-related factor 2 (Nrf2), and heme oxygenase-1 (HO-1) in pancreatic β-cells in pancreatic islets was increased by silibinin treatment. Accordingly, silibinin (10 μM) elevated viability, insulin biosynthesis, and insulin secretion of high glucose/palmitate-treated INS-1 cells accompanied by increased expression of ERα, Nrf2, and HO-1 as well as decreased reactive oxygen species production in vitro. Treatment using an ERα antagonist (MPP) in INS-1 cells or silencing ERα expression in INS-1 and NIT-1 cells with siRNA abolished the protective effects of silibinin. Our study suggests that silibinin activates the Nrf2-antioxidative pathways in pancreatic β-cells through regulation of ERα expression.
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Affiliation(s)
- Chun Chu
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiang Gao
- Department of Natural Products Chemistry, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiang Li
- Qiqihaer Middle School, Qiqihaer 161099, China
| | - Xiaoying Zhang
- Department of Food Quality and Safety, Faculty of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Ruixin Ma
- Department of Food Quality and Safety, Faculty of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Ying Jia
- Department of Food Quality and Safety, Faculty of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Dahong Li
- Department of Natural Products Chemistry, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Dongkai Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Fanxing Xu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
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Xu W, Yu J, Li S, Xu J. Depressive behavior induced by nonylphenol and its effect on the expression of ER-α and ER-β in nerve cells of rats. J Affect Disord 2020; 263:373-381. [PMID: 31969267 DOI: 10.1016/j.jad.2019.12.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/04/2019] [Accepted: 12/05/2019] [Indexed: 01/09/2023]
Abstract
OBJECTIVE To investigate the effects of nonylphenol (NP) exposure on the depressive behavior in rats, and the effects of the expressions of estrogen receptor-α (ER-α) and estrogen receptor-β (ER-β) in nerve cells in vivo and vitro. METHODS Forty male SD rats were randomly divided into 4 groups: blank control group (0 mg/kg), low dose group (0.4 mg/kg), middle dose group (4 mg/kg) and high dose group (40 mg/kg), which were exposed to NP for 180 days. The exposure dose of NP in HT22 was 20μM, which was divided into4 groups: blank control group, NP group, ICI182780 group and ICI182780+NP group. RESULTS In vivo, in the open field experiment, the number of entries in the central area and duration of attention in central square decreased gradually in the NP high dose group compared with the control (F = 3.561, p = .029). In forced swimming experiment, with the increase of NP dose, the immobility time increased, and the increasing degree of middle dose group and high dose group was higher than that of the low dose group (F = 3.047, p = .048). The concentrations of serum dopamine (DA) in the middle dose and high dose groups decreased greatly compared with the control (F = 3.967, p = .023). NP exposure at the doses of 4 mg/kg and 40 mg/kg induced an increase in the level of serum corticosterone compared to the control (F = 11.536, p<.001). Compared with the control group, the expression of ER-β decreased gradually with an increase of NP dose in the NP treatment groups (F = 4.513, p = .014). In vitro, the activity of HT22 cells decreased with an increase of NP dose (F = 316.6, p<.001). When the dose of NP was 200 μM, the growth inhibition rate of HT22 cells was (0.54±0.11)%. The expression levels of ER-α and ER-β in ICI182780+NP group was lower than those in the control and ICI182780 groups, but higher than those in the NP group (F = 1.592, p=.266; F = 10.166, p=.004). CONCLUSION Long-term exposure to NP could induce the alterations in depressive behavior, and the levels of neurotransmitters as well as the expression of ER in the hippocampus of rats. Moreover, NP could reduce the activity of HT22 cells and decrease the expression levels of ER-α and ER-β in vitro.
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Affiliation(s)
- Weihong Xu
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Jie Yu
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China.
| | - Shengnan Li
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Jie Xu
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China.
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10
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Ye SB, Cheng YK, Zhang L, Wang XP, Wang L, Lan P. Prognostic value of estrogen receptor-α and progesterone receptor in curatively resected colorectal cancer: a retrospective analysis with independent validations. BMC Cancer 2019; 19:933. [PMID: 31590647 PMCID: PMC6781392 DOI: 10.1186/s12885-019-5918-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/10/2019] [Indexed: 12/13/2022] Open
Abstract
Background Prognostic assessment is crucial for optimal treatment. The aim of our study was to investigate the potential impact of estrogen receptor-α (ER-α) and progesterone receptor (PR) on the prognosis of colorectal cancer (CRC) patients who received curative resection. Methods Retrospective evaluation of two independent cohorts of CRC patients maintained prospectively in 2009–2010 (training set) (n = 148) and 2007–2009 (internal validation set) (n = 485). Furthermore, we used an external independent CRC cohort from The Cancer Genome Atlas (TCGA) (n = 511) for further validation. ER-α and PR expression as well as other potential prognostic factors were retrospectively evaluated in training set with respect to overall survival (OS), local relapse free survival (LRFS) and distant metastasis free survival (DMFS). The prognostic factors found in training set will be validated in two validation cohorts. Results On univariate analysis for the training set, OS, LRFS and DMFS were not associated with PR expression. While patients with ER-αexpression were found to have poor prognosis. In addition, multivariate analysis showed that ER-αexpression maintained significance with respect to OS (HR, 5.06; p = 0.002), LRFS (HR, 8.81; p = 0.002) and DMFS (HR, 8.07; p = 0.004). Similarly, ER-α expression showed prognostic significance with respect to OS with hazard ratios (HRs) of 1.572 (95% CI: 1.001–2.467, p = 0.049) and 1.624 (95% CI: 1.047–2.520, p = 0.031) for the internal and external validation cohort, respectively. Conclusion ER-α expression was a biomarker of poor prognosis and it might inform treatment decision for high risk CRC patients. However, PR expression was not associated with survival outcomes. Electronic supplementary material The online version of this article (10.1186/s12885-019-5918-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shu-Biao Ye
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Yi-Kan Cheng
- Department of Radiation Oncology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510655, People's Republic of China
| | - Lin Zhang
- Department of Clinical Laboratory, Sun Yat-sen University Cancer Center, Guangzhou, 510060, People's Republic of China.,State Key Laboratory of Oncology in South China, Guangzhou, 510060, People's Republic of China.,Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Xue-Ping Wang
- Department of Clinical Laboratory, Sun Yat-sen University Cancer Center, Guangzhou, 510060, People's Republic of China.,State Key Laboratory of Oncology in South China, Guangzhou, 510060, People's Republic of China.,Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Lei Wang
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Ping Lan
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China. .,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China.
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11
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Gonzalez TL, Rae JM, Colacino JA. Implication of environmental estrogens on breast cancer treatment and progression. Toxicology 2019; 421:41-48. [PMID: 30940549 DOI: 10.1016/j.tox.2019.03.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 03/05/2019] [Accepted: 03/28/2019] [Indexed: 12/22/2022]
Abstract
Breast cancer is the most diagnosed malignancy among women in the United States. Approximately 70% of breast tumors express estrogen receptor alpha and are deemed ER-positive. ER-positive breast tumors depend upon endogenous estrogens to promote ER-mediated cellular proliferation. Decades of research have led to a fundamental understanding of the role ER signaling in this disease and this knowledge has led to significant advancements in the clinical use of antiestrogens for breast cancer treatment. However, adjuvant breast cancer recurrence and metastatic disease progression due to endocrine therapy resistance are prominent and unresolved issues. The established role that estrogens play in breast cancer pathogenesis explains why some patients initially respond to endocrine therapy but also why a significant number of patients become refractory to antiestrogen treatment. It is been hypothesized that exposure to environmental steroid hormone mimics and/or acquired mechanisms of resistance may explain why endocrine therapy fails in a subset of breast cancer patients. This review will highlight: 1) the relationship between ER signaling and breast cancer pathogenesis, 2) the implication of environmental exposures on steroid hormone regulated processes including breast cancer, and 3) the unresolved issue of endocrine therapy resistance.
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Affiliation(s)
- Thomas L Gonzalez
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109, USA.
| | - James M Rae
- Division of Hematology/ Oncology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
| | - Justin A Colacino
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109, USA; Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, MI, 48109, USA; Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, 48109, USA.
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12
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Zafer D, Aycan N, Ozaydin B, Kemanli P, Ferrazzano P, Levine JE, Cengiz P. Sex differences in Hippocampal Memory and Learning following Neonatal Brain Injury: Is There a Role for Estrogen Receptor-α? Neuroendocrinology 2019; 109:249-256. [PMID: 30884486 PMCID: PMC6893032 DOI: 10.1159/000499661] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 03/17/2019] [Indexed: 01/11/2023]
Abstract
Neonatal encephalopathy due to hypoxia-ischemia (HI) leads to severe, life-long morbidities in thousands of neonates born in the USA and worldwide each year. Varying capacities of long-term episodic memory, verbal working memory, and learning can present without cerebral palsy and have been associated with the severity of neonatal encephalopathy sustained at birth. Among children who sustain a moderate degree of HI at birth, girls have larger hippocampal volumes compared to boys. Clinical studies indicate that female neonatal brains are more resistant to the effects of neonatal HI, resulting in better long-term cognitive outcomes compared to males with comparable brain injury. Our most recent mechanistic studies have addressed the origins and cellular basis of sex differences in hippocampal neuroprotection following neonatal HI-related brain injury and implicate estrogen receptor-α (ERα) in the neurotrophin receptor-mediated hippocampal neuroprotection in female mice. This review summarizes the recent findings on ERα-dependent, neurotrophin-mediated hippocampal neuroprotection and weighs the evidence that this mechanism plays an important role in preservation of long-term memory and learning following HI in females.
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Affiliation(s)
- Dila Zafer
- Waisman Center, University of Wisconsin, Madison, Wisconsin, USA
| | - Nur Aycan
- Waisman Center, University of Wisconsin, Madison, Wisconsin, USA
| | - Burak Ozaydin
- Waisman Center, University of Wisconsin, Madison, Wisconsin, USA
| | - Pinar Kemanli
- Waisman Center, University of Wisconsin, Madison, Wisconsin, USA
| | - Peter Ferrazzano
- Waisman Center, University of Wisconsin, Madison, Wisconsin, USA
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Wisconsin, Madison, Wisconsin, USA
| | - Jon E Levine
- Department of Neuroscience, University of Wisconsin, Madison, Wisconsin, USA
- Wisconsin National Primate Research Center, Madison, Wisconsin, USA
| | - Pelin Cengiz
- Waisman Center, University of Wisconsin, Madison, Wisconsin, USA,
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Wisconsin, Madison, Wisconsin, USA,
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13
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Binder AM, Stiemsma LT, Keller K, van Otterdijk SD, Mericq V, Pereira A, Santos JL, Shepherd J, Michels KB. Inverse association between estrogen receptor-α DNA methylation and breast composition in adolescent Chilean girls. Clin Epigenetics 2018; 10:122. [PMID: 30286806 PMCID: PMC6172836 DOI: 10.1186/s13148-018-0553-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 09/14/2018] [Indexed: 12/21/2022] Open
Abstract
Background Estrogen receptor-α (ER-α) is a transcriptional regulator, which mediates estrogen-dependent breast development, as well as breast tumorigenesis. The influence of epigenetic regulation of ER-α on adolescent breast composition has not been previously studied and could serve as a marker of pubertal health and susceptibility to breast cancer. We investigated the association between ER-α DNA methylation in leukocytes and breast composition in adolescent Chilean girls enrolled in the Growth and Obesity Cohort Study (GOCS) in Santiago, Chile. Breast composition (total breast volume (BV; cm3), fibroglandular volume (FGV; cm3), and percent fibroglandular volume (%FGV)) was measured at breast Tanner stage 4 (B4). ER-α promoter DNA methylation was assessed by pyrosequencing in blood samples collected at breast Tanner stages 2 (B2; n = 256) and B4 (n = 338). Results After adjusting for fat percentage at breast density measurement, ER-α methylation at B2, and cellular heterogeneity, we observed an inverse association between B4 average ER-α DNA methylation and BV and FGV. Geometric mean BV was 15% lower (95% CI: − 28%, − 1%) among girls in the highest quartile of B4 ER-α methylation (6.96–23.60%) relative to the lowest (0.78–3.37%). Similarly, FGV was 19% lower (95% CI: − 33%, − 2%) among girls in the highest quartile of B4 ER-α methylation relative to the lowest. The association between ER-α methylation and breast composition was not significantly modified by body fat percentage and was not influenced by pubertal timing. Conclusions These findings suggest that the methylation profile of ER-α may modulate adolescent response to estrogen and breast composition, which may influence breast cancer risk in adulthood. Electronic supplementary material The online version of this article (10.1186/s13148-018-0553-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alexandra M Binder
- Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, 90095, USA
| | - Leah T Stiemsma
- Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, 90095, USA
| | - Kristen Keller
- Department of Biostatistics, Fielding School of Public Health, University of California, Los Angeles, 90095, USA
| | - Sanne D van Otterdijk
- Institute for Prevention and Cancer Epidemiology, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg im Breisgau, Germany
| | - Verónica Mericq
- Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Ana Pereira
- Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - José L Santos
- Department of Nutrition, Diabetes and Metabolism, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - John Shepherd
- Population Sciences in the Pacific Program, University of Hawaii Cancer Center, Honolulu, HI, 96813, USA
| | - Karin B Michels
- Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, 90095, USA.
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Ye H, Dudley SZ, Shaw IC. Intimate estrogen receptor-α/ligand relationships signal biological activity. Toxicology 2018; 408:80-7. [PMID: 30018014 DOI: 10.1016/j.tox.2018.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 06/05/2018] [Accepted: 07/05/2018] [Indexed: 01/31/2023]
Abstract
How does estrogen receptor-α bind its natural ligands - estrogens? How can other molecules mimic estrogens and elicit different estrogenic responses? The answers lie in a complex and intimate chemical biology between ligands and receptor. This delicate interaction at the ligand binding cleft signals, via conformational change, exposure of a specific new charge topography at a second site (Activation Function-2). This, in turn, attracts a regulatory protein which modulates gene expression and controls biological activity.
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15
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Ashtekar SS, Bhatia NM, Bhatia MS. Development of leads targeting ER-α in breast cancer: An in silico exploration from natural domain. Steroids 2018; 131:14-22. [PMID: 29307843 DOI: 10.1016/j.steroids.2017.12.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/26/2017] [Accepted: 12/28/2017] [Indexed: 11/25/2022]
Abstract
The steroid, estrogen has been recognized as being important for stimulating the growth of breast cancers primarily mediated via the steroidal estrogen receptor-α (ER-α). Inhibition of estrogen activity by small molecules with increased target specificity has proven to be an effective treatment for breast cancer. After the success stories of SERMs and fulvestrant, there is a need for the development of new small molecule modulating ER-α is due to developing resistance and side effects to current breast cancer therapy. In this pursuit, we virtually screened 227 chemically diverse bioactive natural products to get the best hits having an ER-α binding affinity. The docking scores and protein-ligand interactions of the obtained hits were emulated with the clinically used selective estrogen modulators and ER-antagonists. The results revealed 18 potential hits, which were putatively classified as hits belonging to ER agonists, modulators, and antagonists. Furthermore, as most of the hits were found to comprise the chromene nucleus, the 2D and 3D QSAR studies were performed using a set of natural products and synthesized compounds containing this scaffold, to understand the structural requirements for improving activity against breast cancer. Additionally, a pharmacophore model was generated to investigate the pharmacophoric features of the explored scaffolds for an optimal anticancer activity. The results signify that these compounds with structural modification could serve as potential leads in the drug discovery process for the treatment of breast cancer.
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Affiliation(s)
- Snehal S Ashtekar
- Department of Quality Assurance, Bharati Vidyapeeth College of Pharmacy, Kolhapur 416013, Maharashtra, India.
| | - Neela M Bhatia
- Department of Quality Assurance, Bharati Vidyapeeth College of Pharmacy, Kolhapur 416013, Maharashtra, India
| | - Manish S Bhatia
- Department of Pharmaceutical Chemistry, Bharati Vidyapeeth College of Pharmacy, Kolhapur 416013, Maharashtra, India
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16
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Tian M, Schiemann WP. TGF-β Stimulation of EMT Programs Elicits Non-genomic ER-α Activity and Anti-estrogen Resistance in Breast Cancer Cells. ACTA ACUST UNITED AC 2017; 3:150-160. [PMID: 28955730 DOI: 10.20517/2394-4722.2017.38] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
AIM Estrogen receptor-α (ER-α) activation drives the progression of luminal breast cancers. Signaling by transforming growth factor-β (TGF-β) typically opposes the actions of ER-α; it also induces epithelial-mesenchymal transition (EMT) programs that promote breast cancer dissemination, stemness, and chemoresistance. The impact of EMT programs on nongenomic ER-α signaling remains unknown and was studied herein. METHODS MCF-7 and BT474 cells were stimulated with TGF-β to induce EMT programs, at which point ER-α expression, localization, and nongenomic interactions with receptor tyrosine kinases and MAP kinases (MAPKs) were determined. Cell sensitivity to anti-estrogens both before and after traversing the EMT program was also investigated. RESULTS TGF-β stimulated MCF-7 and BT474 cells to acquire EMT phenotypes, which enhanced cytoplasmic accumulation of ER-α without altering its expression. Post-EMT cells exhibited (i) elevated expression of EGFR and IGF1R, which together with Src formed cytoplasmic complexes with ER-α; (ii) enhanced coupling of EGF, IGF-1 and estrogen to the activation of MAPKs; and (iii) reduced sensitivity to tamoxifen, an event reversed by administration of small molecule inhibitors against the receptors for TGF-β, EGF, and IGF-1, as well as those against MAPKs. CONCLUSION EMT stimulated by TGF-β promotes anti-estrogen resistance by activating EGFR-, IGF1R-, and MAPK-dependent nongenomic ER-α signaling.
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Affiliation(s)
- Maozhen Tian
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106
| | - William P Schiemann
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106
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17
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Amita M, Takahashi T, Igarashi H, Nagase S. Clomiphene citrate down-regulates estrogen receptor-α through the ubiquitin-proteasome pathway in a human endometrial cancer cell line. Mol Cell Endocrinol 2016; 428:142-7. [PMID: 27033325 DOI: 10.1016/j.mce.2016.03.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/21/2016] [Accepted: 03/22/2016] [Indexed: 02/07/2023]
Abstract
We examined how clomiphene citrate (CC) reduces estrogen receptor-α (ERα) in a human endometrial cancer cell line. Ishikawa human endometrial cancer cells were treated with ERα ligands such as 17β-estradiol (E2), CC, and the pure antiestrogen, ICI 182,780 (ICI). Thereafter, the expression levels of ERα protein and mRNA were analyzed by western blot and real-time quantitative PCR, respectively, and those of ubiquitinated ERα were analyzed by immunoprecipitation of ERα followed by immunoblotting with an anti-ubiquitin antibody. The expression levels of ERα protein after treatment with E2, CC, and ICI were significantly decreased compared to pre-treatment levels without a corresponding decrease in ERα mRNA. These ligands significantly increased the levels of ubiquitinated ERα compared to vehicle treatment. Co-treatment with the proteasome inhibitor, MG132, abrogated the decrease in ERα levels caused by treatment with the ligands only. We demonstrated, for the first time, a CC-induced decrease in ERα mediated by the ubiquitin-proteasome pathway in human endometrial cancer cells.
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Affiliation(s)
- Mitsuyoshi Amita
- Department of Obstetrics and Gynecology, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - Toshifumi Takahashi
- Department of Obstetrics and Gynecology, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan.
| | - Hideki Igarashi
- Department of Obstetrics and Gynecology, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - Satoru Nagase
- Department of Obstetrics and Gynecology, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
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18
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Li Z, Zhu Q, Chen H, Hu L, Negi H, Zheng Y, Ahmed Y, Wu Z, Li D. Binding of anterior gradient 2 and estrogen receptor-α: Dual critical roles in enhancing fulvestrant resistance and IGF-1-induced tumorigenesis of breast cancer. Cancer Lett 2016; 377:32-43. [PMID: 27063095 DOI: 10.1016/j.canlet.2016.04.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 03/03/2016] [Accepted: 04/03/2016] [Indexed: 11/29/2022]
Abstract
Anterior gradient 2 (AGR2), an essential cancer biomarker, has been widely reported to be associated with estrogen receptor (ER) positive breast cancer development. Here, we uncovered the role of cytoplasmic and exogenous AGR2, through interaction with ER-α, in enhancing fulvestrant resistance and IGF-1-induced carcinogenesis respectively. Our present study revealed that the endogenous AGR2 level positively correlates with fulvestrant resistance in MCF-7 and T47D cells. AGR2-knockdown in MCF-7 cells strongly enhances the fulvestrant-induced G1 phase arrest and accelerates the fulvestrant-induced ER-α degradation. Furthermore, intracellular AGR2 exhibits a functional interaction with ER-α. On the other hand, extracellular AGR2 remarkably promotes the IGF-1-induced cell proliferation, migration, cell cycle progression and epithelial-mesenchymal transition. Extracellular AGR2 also enhances IGF-1 downstream signaling. We also showed that ER-α specifically interacts with both extracellular AGR2 and IGF-1 receptor as a potential intermediator. Finally, we revealed that the adjuvant therapy of AGR2 monoclonal antibody enhances the inhibitory effects of fulvestrant and linsitinib toward breast cancer development. Our findings, for the first time, point out the different functions of intra- and extra-cellular AGR2, providing new insights into the development of anti-tumor therapies targeting AGR2.
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Affiliation(s)
- Zheqi Li
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; School of Medicine, University of Pittsburgh, 200 Lothrop Street, Pittsburgh, PA 15213, USA
| | - Qi Zhu
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Hao Chen
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Lingyun Hu
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Hema Negi
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yun Zheng
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yeasin Ahmed
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhenghua Wu
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
| | - Dawei Li
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, 800 Dongchuan Road, Shanghai 200240, China.
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19
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Saito K, He Y, Yan X, Yang Y, Wang C, Xu P, Hinton AO, Shu G, Yu L, Tong Q, Xu Y. Visualizing estrogen receptor-α-expressing neurons using a new ERα-ZsGreen reporter mouse line. Metabolism 2016; 65:522-32. [PMID: 26975544 PMCID: PMC4794642 DOI: 10.1016/j.metabol.2015.12.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 12/18/2015] [Accepted: 12/19/2015] [Indexed: 01/15/2023]
Abstract
BACKGROUND A variety of biological functions of estrogens, including regulation of energy metabolism, are mediated by neurons expressing estrogen receptor-α (ERα) in the brain. However, complex intracellular processes in these ERα-expressing neurons are difficult to unravel, due to the lack of strategy to visualize ERα-expressing neurons, especially in unfixed brain tissues. RESULTS AND CONCLUSIONS Here we generated a novel ERα-ZsGreen reporter mouse line in which expression of a green fluorescent reporter protein, ZsGreen, is driven by a 241kb ERα gene promoter. We validated that ZsGreen is highly colocalized with endogenous ERα in the brain. Native ZsGreen signals were visualized in unfixed brain tissue, and were used to assist single cell collection and electrophysiological recordings. Finally, we demonstrated that this ERα-ZsGreen mouse allele can be used in combination with other genetic reporter alleles to allow experiments in highly selective neural populations.
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Affiliation(s)
- Kenji Saito
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Yanlin He
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Xiaofeng Yan
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Yongjie Yang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Chunmei Wang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Pingwen Xu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Antentor Othrell Hinton
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Gang Shu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Likai Yu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Qingchun Tong
- Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX 77030
| | - Yong Xu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030; Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030.
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Froyen EB, Steinberg FM. Genistein decreases basal hepatic cytochrome P450 1A1 protein expression and activity in Swiss Webster mice. Nutr Res 2016; 36:430-9. [PMID: 27101761 DOI: 10.1016/j.nutres.2016.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Revised: 12/29/2015] [Accepted: 01/06/2016] [Indexed: 01/20/2023]
Abstract
Soy consumption has been associated with risk reduction for chronic diseases such as cancer. One proposed mechanism for cancer prevention by soy is through decreasing cytochrome P450 1A1 (Cyp1a1) activity. However, it is not known with certainty which soy components modulate Cyp1a1, or the characteristics or mechanisms involved in the responses after short-term (<20 days) dietary treatment without concomitant carcinogen-mediated induction. Therefore, the objective was to test the hypothesis that physiologic concentrations of dietary genistein and/or daidzein will decrease basal hepatic Cyp1a1 protein expression and activity in male and female Swiss Webster mice via inhibiting the bindings of aryl hydrocarbon receptor (AhR)-AhR nuclear translocator (ARNT) and estrogen receptor-α to the Cyp1a1 promoter region xenobiotic response element. The mice were fed the AIN-93G diet supplemented with 1500 mg/kg of genistein or daidzein for up to 1 week. Genistein, but not daidzein, significantly decreased basal hepatic microsomal Cyp1a1 protein expression and activity. AhR protein expression was not altered. Molecular mechanisms were investigated in Hepa-1c1c7 cells treated with 5 μmol/L purified aglycones genistein, daidzein, or equol. Cells treated with genistein exhibited inhibitions in ARNT and estrogen receptor-α bindings to the Cyp1a1 promoter region. This study demonstrated that genistein consumption reduced constitutive hepatic Cyp1a1 protein expression and activity, thereby contributing to the understanding of how soy isoflavone aglycones modulate cytochrome P450 biotransformation enzymes.
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Affiliation(s)
- Erik B Froyen
- Department of Nutrition and Graduate Group in Nutritional Biology, University of California, Davis, Davis, CA 95616, USA
| | - Francene M Steinberg
- Department of Nutrition and Graduate Group in Nutritional Biology, University of California, Davis, Davis, CA 95616, USA.
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21
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Cho YJ, Park SB, Han M. Di-(2-ethylhexyl)-phthalate induces oxidative stress in human endometrial stromal cells in vitro. Mol Cell Endocrinol 2015; 407:9-17. [PMID: 25766500 DOI: 10.1016/j.mce.2015.03.003] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 03/03/2015] [Accepted: 03/03/2015] [Indexed: 01/12/2023]
Abstract
Di-(2-ethylhexyl)-phthalate (DEHP) accumulates in the environment, and its exposure is possibly associated with endocrine-related disease in women of reproductive age. The effects of DEHP on human endometrial cells are unknown. We treated human endometrial stromal cells with 10, 100, and 1000 pmol of DEHP and measured reactive oxygen species (ROS) generation, expression levels of antioxidant enzymes, alteration of MAPK/NF-κB signaling and hormonal receptors. DEHP increased reactive oxygen species (ROS) generation and decreased expression of superoxide dismutase (SOD), glutathione peroxidase (GPX), heme oxygenase (HO), and catalase (CAT). By DEHP exposure, p-ERK/p-p38 and NF-κB mediated transcription was increased. Additionally, DEHP induced estrogen receptor-α (ER-α) expression in a dose-dependent manner. This study shows the need for future mechanistic studies of oxidative stress, MAPK/NF-κB signaling, and ER-α as molecular mediators of DEHP-associated endometrial stromal cell alterations, which may be associated with the development of endocrine-related disease such as endometriosis.
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Affiliation(s)
- Yeon Jean Cho
- Department of Obstetrics and Gynecology, Dong-A University Medical Center, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Seung Bin Park
- Department of Obstetrics and Gynecology, Dong-A University Medical Center, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Myoungseok Han
- Department of Obstetrics and Gynecology, Dong-A University Medical Center, College of Medicine, Dong-A University, Busan, Republic of Korea.
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22
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Matsuzaki T, Iwasa T, Munkhzaya M, Tungalagsuvd A, Kawami T, Murakami M, Yamasaki M, Yamamoto Y, Kato T, Kuwahara A, Yasui T, Irahara M. Developmental changes in hypothalamic oxytocin and oxytocin receptor mRNA expression and their sensitivity to fasting in male and female rats. Int J Dev Neurosci 2015; 41:105-9. [PMID: 25637830 DOI: 10.1016/j.ijdevneu.2015.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 01/08/2015] [Accepted: 01/09/2015] [Indexed: 12/16/2022] Open
Abstract
Oxytocin (OT) affects the central nervous system and is involved in a variety of social and non-social behaviors. Recently, the role played by OT in energy metabolism and its organizational effects on estrogen receptor alpha (ER-α) during the neonatal period have gained attention. In this study, the developmental changes in the hypothalamic mRNA levels of OT, the OT receptor (OTR), and ER-α were evaluated in male and female rats. In addition, the fasting-induced changes in the hypothalamic mRNA levels of OT and the OTR were evaluated. Hypothalamic explants were taken from postnatal day (PND) 10, 20, and 30 rats, and the mRNA level of each molecule was measured. Hypothalamic OT mRNA expression increased throughout the developmental period in both sexes. The rats' hypothalamic OTR mRNA levels were highest on PND 10 and decreased throughout the developmental period. In the male rats, the hypothalamic mRNA levels of ER-α were higher on PND 30 than on PND 10. On the other hand, no significant differences in hypothalamic ER-α mRNA expression were detected among the examined time points in the female rats, although hypothalamic ER-α mRNA expression tended to be higher on PND 30 than on PND 10. Significant positive correlations were detected between hypothalamic OT and ER-α mRNA expression in both the male and female rats. Hypothalamic OT mRNA expression was not affected by fasting at any of the examined time points in either sex. These results indicate that hypothalamic OT expression is not sensitive to fasting during the developmental period. In addition, as a positive correlation was detected between hypothalamic OT and ER-α mRNA expression, these two molecules might interact with each other to induce appropriate neuronal development.
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Affiliation(s)
- Toshiya Matsuzaki
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan.
| | - Takeshi Iwasa
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Munkhsaikhan Munkhzaya
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Altankhuu Tungalagsuvd
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Takako Kawami
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Masahiro Murakami
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Mikio Yamasaki
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Yuri Yamamoto
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Takeshi Kato
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Akira Kuwahara
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Toshiyuki Yasui
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
| | - Minoru Irahara
- Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, 3-18-15 Kuramoto-Cho Tokushima 770-8503, Japan
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Rai AL, Jeswar U. Immunohistochemical colocalization of estrogen receptor-α and GABA in adult female rat hippocampus. Ann Neurosci 2012; 19:112-5. [PMID: 25205981 DOI: 10.5214/ans.0972.7531.190305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 06/06/2012] [Accepted: 07/17/2012] [Indexed: 11/22/2022] Open
Abstract
Background Hippocampus is an important target for estrogen action. It is severely affected in patients of Alzheimer’s disease. Much of the current research related to estrogen and brain function is focused in two directions. Purpose By attempting to lacalize localizing ERs in GABAergic neurons of the hippocampus we tried to test the hypothesis that the action of estrogen in maintaining the neuronal plasticity and more specially the spine density of pyramidal neurons is through GABAergic neurons. Methods The present study was planned to demonstrate the detailed immunoreactive (IR) distribution pattern of estrogen receptors (ER) in GABAergic neurons of hippocampus. The study was conducted in adult female Wistar rats in estrous phase. 30 µm thick cryostat sections of hippocampal region were obtained from perfusion fixed (with 4% buffered Para formaldehyde) adult female rats (n = 15). The sections were processed free- floating for immunolocalization using the PAP protocol. First they were immunostained for ER using, mouse monoclonal anti-ER-α antibody with DAB as chromogen. Subsequently the same sections were immunostained for GABA using rabbit monoclonal anti-GABA antibody respectively with 9 amino 3 ethyl carbazole (AEC) as chromogen. Results The results showed ER were colocalised in GABAergic neurons in all the subfields of hippocampus with obvious variations. In Cornua ammonis (CA) maximum co-localised neurons were seen in CA3 region. Conclusions The view is strengthened by our results as it was established through previous studies that the immediate target neurons of estrogen in hippocampus is the GABAergic neurons.
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Wu YC, Du X, van den Buuse M, Hill RA. Sex differences in the adolescent developmental trajectory of parvalbumin interneurons in the hippocampus: a role for estradiol. Psychoneuroendocrinology 2014; 45:167-78. [PMID: 24845187 DOI: 10.1016/j.psyneuen.2014.03.016] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 03/25/2014] [Accepted: 03/27/2014] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Gender differences in the neurodevelopmental disorder, schizophrenia, have been described for nearly all features of the illness. Reduced hippocampal expression of the GABAergic interneuron marker, parvalbumin (PV), and GABA synthesizing enzyme, GAD67, are consistently reported in schizophrenia. However, little is known of the expression patterns of hippocampal PV and GAD67 during adolescence and their interaction with sex steroid hormones during adolescent development. This study examined the effects of altered sex steroid hormone levels during adolescence on protein levels of PV, GAD67 and estrogen receptors (ERα/β) in the hippocampus of mice. METHODS Protein expression of PV and GAD67 was measured in the dorsal (DHP) and ventral (VHP) hippocampus of female and male C57Bl/6 mice by Western blot in a week by week analysis from pre-pubescence to adulthood (week 3-12). Fluorescent immunohistochemistry (IHC) was used to investigate the relationship between ERs and PV(+) cells in the hippocampus of female mice at young adulthood (week 10-11). To further examine the role of sex steroid hormones on PV and GAD67 expression, gonadectomy and hormone replacement was done at 5 weeks of age. RESULTS Female mice showed a significant gradual increase in PV expression from 3 to 12 weeks of age in the DHP and VHP which correlated with serum 17β-estradiol levels. Fluorescent IHC showed approximately 30-50% co-localization of ER-α in PV(+) cells in the female DHP and VHP (dentate gryus/hilus and CA1-CA3). Adolescent ovariectomy significantly reduced PV expression in the DHP but not VHP of female mice, while 17β-estradiol replacement prevented this deficit in DHP PV levels. ER-α expression, but not ER-β, was also reduced in the DHP following ovariectomy with no significant effect of 17β-estradiol replacement. In contrast to female mice, male mice did not show any significant changes in hippocampal PV/GAD67 expression throughout adolescent development. Furthermore, adolescent castration and treatment with testosterone or dihydrotestosterone produced no changes in PV/GAD67 expression. CONCLUSIONS Our data suggest a differential developmental trajectory of PV expression between the sexes and manipulating circulating levels of sex steroid hormones by ovariectomy alters this trajectory in a region-dependent manner. This may be mediated via ER-α signaling as this receptor was found to be co-localized with PV(+) cells in the female mouse hippocampus. Alternative mechanisms of 17β-estradiol-induced regulation of PV expression are also discussed herein. Together, results from the present study may offer more insight into neurodevelopmental disorders, including schizophrenia, where sex steroid hormones and GABAergic markers are implicated in the pathophysiology of the illness.
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Affiliation(s)
- YeeWen Candace Wu
- Behavioural Neuroscience Laboratory, Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Australia; Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Australia
| | - Xin Du
- Behavioural Neuroscience Laboratory, Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Australia
| | - Maarten van den Buuse
- Behavioural Neuroscience Laboratory, Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Australia; Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Australia; School of Psychological Science, La Trobe University, Melbourne, Australia
| | - Rachel A Hill
- Behavioural Neuroscience Laboratory, Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Australia.
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Davis KE, Carstens EJ, Irani BG, Gent LM, Hahner LM, Clegg DJ. Sexually dimorphic role of G protein-coupled estrogen receptor (GPER) in modulating energy homeostasis. Horm Behav 2014; 66:196-207. [PMID: 24560890 PMCID: PMC4051842 DOI: 10.1016/j.yhbeh.2014.02.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/07/2014] [Accepted: 02/08/2014] [Indexed: 12/30/2022]
Abstract
This article is part of a Special Issue "Energy Balance". The classical estrogen receptors, estrogen receptor-α and estrogen receptor-β are well established in the regulation of body weight and energy homeostasis in both male and female mice, whereas, the role for G protein-coupled estrogen receptor 1 (GPER) as a modulator of energy homeostasis remains controversial. This study sought to determine whether gene deletion of GPER (GPER KO) alters body weight, body adiposity, food intake, and energy homeostasis in both males and females. Male mice lacking GPER developed moderate obesity and larger adipocyte size beginning at 8 weeks of age, with significant reductions in energy expenditure, but not food intake or adipocyte number. Female GPER KO mice developed increased body weight relative to WT females a full 6 weeks later than the male GPER KO mice. Female GPER KO mice also had reductions in energy expenditure, but no significant increases in body fat content. Consistent with their decrease in energy expenditure, GPER KO males and females showed significant reductions in two brown fat thermogenic proteins. GPER KO females, prior to their divergence in body weight, were less sensitive than WT females to the feeding-inhibitory effects of leptin and CCK. Additionally, body weight was not as modulated by ovariectomy or estradiol replacement in GPER KO mice. Estradiol treatment activated phosphorylated extracellular signal-regulated kinase (pERK) in WT but not GPER KO females. For the first time, GPER expression was found in the adipocyte but not the stromal fraction of adipose tissue. Together, these results provide new information elucidating a sexual dimorphism in GPER function in the development of postpubertal energy balance.
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Affiliation(s)
- Kathryn E Davis
- University of Texas Southwestern Medical Center, Department of Plastic Surgery, 5323 Harry Hines Blvd., Dallas, TX 75390-8860, USA
| | - Elizabeth J Carstens
- University of Texas Southwestern Medical Center, School of Medicine, 5323 Harry Hines Blvd., Dallas, TX 75390-8854, USA
| | - Boman G Irani
- University of Texas Southwestern Medical Center, Department of Internal Medicine, 5323 Harry Hines Blvd., Dallas, TX 75390-8854, USA
| | - Lana M Gent
- University of Texas Southwestern Medical Center, Department of Internal Medicine, 5323 Harry Hines Blvd., Dallas, TX 75390-8854, USA
| | - Lisa M Hahner
- University of Texas Southwestern Medical Center, Department of Internal Medicine, 5323 Harry Hines Blvd., Dallas, TX 75390-8854, USA
| | - Deborah J Clegg
- University of Texas Southwestern Medical Center, Department of Internal Medicine, 5323 Harry Hines Blvd., Dallas, TX 75390-8854, USA.
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Abstract
Some chemicals used in consumer products or manufacturing (e.g. plastics, surfactants, pesticides, resins) have estrogenic activities; these xenoestrogens (XEs) chemically resemble physiological estrogens and are one of the major categories of synthesized compounds that disrupt endocrine actions. Potent rapid actions of XEs via nongenomic mechanisms contribute significantly to their disruptive effects on functional endpoints (e.g. cell proliferation/death, transport, peptide release). Membrane-initiated hormonal signaling in our pituitary cell model is predominantly driven by mERα with mERβ and GPR30 participation. We visualized ERα on plasma membranes using many techniques in the past (impeded ligands, antibodies to ERα) and now add observations of epitope proximity with other membrane signaling proteins. We have demonstrated a range of rapid signals/protein activations by XEs including: calcium channels, cAMP/PKA, MAPKs, G proteins, caspases, and transcription factors. XEs can cause disruptions of the oscillating temporal patterns of nongenomic signaling elicited by endogenous estrogens. Concentration effects of XEs are nonmonotonic (a trait shared with natural hormones), making it difficult to design efficient (single concentration) toxicology tests to monitor their harmful effects. A plastics monomer, bisphenol A, modified by waste treatment (chlorination) and other processes causes dephosphorylation of extracellular-regulated kinases, in contrast to having no effects as it does in genomic signaling. Mixtures of XEs, commonly found in contaminated environments, disrupt the signaling actions of physiological estrogens even more severely than do single XEs. Understanding the features of XEs that drive these disruptive mechanisms will allow us to redesign useful chemicals that exclude estrogenic or anti-estrogenic activities.
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Affiliation(s)
- Cheryl S Watson
- Department of Biochemistry & Molecular Biology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
| | - Guangzhen Hu
- Department of Biochemistry & Molecular Biology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
| | - Adriana A Paulucci-Holthauzen
- Center for Biomedical Engineering, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
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Liu MH, Cheung E. Estrogen receptor-mediated long-range chromatin interactions and transcription in breast cancer. Mol Cell Endocrinol 2014; 382:624-632. [PMID: 24071518 DOI: 10.1016/j.mce.2013.09.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 12/15/2022]
Abstract
Estrogen induces the binding of ERα to thousands of locations in the breast cancer genome, preferring intergenic and distal regions rather than near the promoters of estrogen-regulated genes. With recent technological innovations in mapping and characterization of global chromatin organization, evidence now indicates ERα mediates long-range chromatin interactions to control gene transcription. The principles that govern how ERα communicates with their putative target genes via chromosomal interactions are also beginning to unravel. Herein, we summarize our current knowledge on the functional significance of chromatin looping in estrogen-mediated transcription. ERα collaborative factors and other players that contribute to define the genomic interactions in breast cancer cells will also be discussed. Defects in chromatin organization are emerging key players in diseases such as cancer, thus understanding how ERα-mediated chromatin looping affects genome organization will clarify the receptor's role in estrogen responsive pathways sensitive to defects in chromatin organization.
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Affiliation(s)
- Mei Hui Liu
- Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Singapore 117543, Singapore; Cancer Biology and Pharmacology, Genome Institute of Singapore, A∗STAR (Agency for Science, Technology and Research), Singapore 138672, Singapore
| | - Edwin Cheung
- Cancer Biology and Pharmacology, Genome Institute of Singapore, A∗STAR (Agency for Science, Technology and Research), Singapore 138672, Singapore.
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Dasgupta S, Eudaly J. Estrogen receptor-alpha mediates Toll-like receptor-2 agonist-induced monocyte chemoattractant protein-1 production in mesangial cells. Results Immunol 2012; 2:196-203. [PMID: 24371584 DOI: 10.1016/j.rinim.2012.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 10/02/2012] [Accepted: 10/09/2012] [Indexed: 10/27/2022]
Abstract
TLR2 agonists are well known for inducing NF-kB activation and inflammation, while estrogen receptor-alpha (ER-α) is a regulator of estrogen-mediated anti-inflammatory responses. In the present work, we determined the role of ER-α and phosphorylated ER-α in TLR2 agonist-induced MCP1 production in mesangial cells. We found that TLR2 agonists induced nuclear localization of phospho-ER-α (serine 118), and estrogen and TLR2 agonists both induced phosphorylation of ER-α at the serine 118 and 104/106 positions. Incubation of MRL/lpr mesangial cells with estrogen was found to attenuate TLR2 agonist-mediated MCP1 production. To determine the mode of action of ER-α/pER-α (serine-118), we used the ER-α inhibitor MPP and transfected mesangial cells with ER-α siRNA. ER-α inhibition was found to decrease MCP1 production in mesangial cells. Thus, ER-α/pER-α is an intermediate regulator for both TLR2-mediated MCP1 production during inflammation and estrogen-mediated anti-inflammatory signals in mesangial cells.
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Affiliation(s)
- Subhajit Dasgupta
- (Autoimmunity and Neurodegeneration), Department of Neuroscience, (Neurosciences and Neuroscience research), Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jackie Eudaly
- Rheumatology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA
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