1
|
Arabacı Tamer S, Şen LS, Güneş K, Yüksel M, Çetinel Ş, Yeğen BÇ. Neuropeptide W protects against ovarian oxidative injury and reinforces ovarian steroidogenic activity via the upregulation of ERα expression. J Pharm Pharmacol 2024:rgad098. [PMID: 38457354 DOI: 10.1093/jpp/rgad098] [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: 03/31/2023] [Accepted: 10/23/2023] [Indexed: 03/10/2024]
Abstract
OBJECTIVES The aim of this study was to investigate the protective effect of neuropeptide W (NPW) on ovarian ischemia-reperfusion-induced oxidative injury and ovarian steroid metabolism. METHODS Rats were randomly divided into control and ischemia groups that received either saline or NPW (0.1 or 5 μg/kg/day). Bilateral ovarian ischemia was performed for 3 h followed by a 72-h reperfusion. Blood, ovary, and uterus samples were collected for biochemical and histological assessments. KEY FINDINGS Treatment with either dose of NPW alleviated oxidative injury of the ovaries with a significant suppression in free radical formation and decreased histopathological injury in both the ovarian and uterine tissues, along with reduced lipid peroxidation and neutrophil accumulation in the uterus. Moreover, NPW treatment reversed the decrease in aromatase expression with a concomitant reduction in the expression of the inactivity enzyme estrogen sulfotransferase. Also, downregulation of estrogen receptor-α (ERα) expression in the injured ovarian tissue was abolished by NPW treatment, which implicates that the protective effect of NPW on the female reproductive system may involve the upregulation of the ERα-mediated signaling pathway. CONCLUSIONS Our study demonstrated for the first time that NPW protects against ovarian oxidative injury and reinforces ovarian steroidogenic activity, which is accompanied by the upregulation of ERα expression in the ovaries.
Collapse
Affiliation(s)
- Sevil Arabacı Tamer
- Department of Physiology, Marmara University School of Medicine, Istanbul, Türkiye
| | - Leyla Semiha Şen
- Department of Physiology, Marmara University School of Medicine, Istanbul, Türkiye
| | - Kasım Güneş
- Department of Histology and Embryology, Marmara University School of Medicine, Istanbul, Türkiye
| | - Meral Yüksel
- Medical Laboratory Techniques Department, Marmara University Vocational School of Health Sciences, Istanbul, Türkiye
| | - Şule Çetinel
- Department of Histology and Embryology, Marmara University School of Medicine, Istanbul, Türkiye
| | - Berrak Ç Yeğen
- Department of Physiology, Marmara University School of Medicine, Istanbul, Türkiye
| |
Collapse
|
2
|
Zhang X, Xiang S, Zhang Y, Liu S, Lei G, Hines S, Wang N, Lin H. In vitro study to identify ligand-independent function of estrogen receptor-α in suppressing DNA damage-induced chondrocyte senescence. FASEB J 2023; 37:e22746. [PMID: 36622202 PMCID: PMC10369926 DOI: 10.1096/fj.202201228r] [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: 09/20/2022] [Revised: 11/29/2022] [Accepted: 12/19/2022] [Indexed: 01/10/2023]
Abstract
In osteoarthritis (OA), chondrocytes undergo many pathological alternations that are linked with cellular senescence. However, the exact pathways that lead to the generation of a senescence-like phenotype in OA chondrocytes are not clear. Previously, we found that loss of estrogen receptor-α (ERα) was associated with an increased senescence level in human chondrocytes. Since DNA damage is a common cause of cellular senescence, we aimed to study the relationship among ERα levels, DNA damage, and senescence in chondrocytes. We first examined the levels of ERα, representative markers of DNA damage and senescence in normal and OA cartilage harvested from male and female human donors, as well as from male mice. The influence of DNA damage on ERα levels was studied by treating human chondrocytes with doxorubicin (DOX), which is an often-used DNA-damaging agent. Next, we tested the potential of overexpressing ERα in reducing DNA damage and senescence levels. Lastly, we explored the interaction between ERα and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway. Results indicated that the OA chondrocytes contained DNA damage and displayed senescence features, which were accompanied by significantly reduced ERα levels. Overexpression of ERα reduced the levels of DNA damage and senescence in DOX-treated normal chondrocytes and OA chondrocytes. Moreover, DOX-induced the activation of NF-κB pathway, which was partially reversed by overexpressing ERα. Taken together, our results demonstrated the critical role of ERα in maintaining the health of chondrocytes by inhibiting DNA damage and senescence. This study also suggests that maintaining the ERα level may represent a new avenue to prevent and treat OA.
Collapse
Affiliation(s)
- Xiurui Zhang
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shiqi Xiang
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Yiqian Zhang
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Silvia Liu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Guanghua Lei
- Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Sophie Hines
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Ning Wang
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hang Lin
- Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Department of Bioengineering, University of Pittsburgh Swanson School of Engineering, Pittsburgh, Pennsylvania, USA.,McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| |
Collapse
|
3
|
Aydın YM, Şahin AB, Dölek R, Vuruşkan BA, Ocakoğlu G, Vuruşkan H, Yavaşcaoğlu İ, Coşkun B. Prognostic value of estrogen receptors in patients who underwent prostatectomy for non‑metastatic prostate cancer. Oncol Lett 2023; 25:78. [PMID: 36742361 PMCID: PMC9853097 DOI: 10.3892/ol.2023.13664] [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: 09/07/2022] [Accepted: 11/29/2022] [Indexed: 01/11/2023] Open
Abstract
Estrogen receptors in prostate cancer (PCa) are a subject of debate. The aim of the present study was to investigate whether estrogen receptor-α (ERα) and estrogen receptor-β (ERβ) impact the biochemical recurrence (BCR) of non-metastatic PCa after surgery. Following the application of the exclusion criteria, data from 108 patients who underwent laparoscopic radical prostatectomy between January 2011 and December 2019 were retrospectively evaluated. A total of 36 patients with BCR constituted the BCR group. The control group was formed using the Propensity Score Matching (PSM) method with a 1:2 ratio, including parameters with well-studied effects on BCR. The median follow-up time was 74.3 (range, 30-127.5) months in the BCR group and 66.6 (range, 31.5-130) months in the control group. Pathology specimens from the two groups were immunohistochemically stained with ERα and ERβ antibodies. Logistic regression analysis and survival analysis were performed. No differences in clinicopathological characteristics were detected between the two groups. The patients with ERα(-)/ERβ(+) staining results had a significantly fewer BCRs than other patients (P=0.024). In the logistic regression analysis, patients with ERα(-)/ERβ(+) PCa also had a significantly lower risk of recurrence (P=0.048). In the survival analysis, the 5-year BCR-free survival rate of patients with ERα(-)/ERβ(+) PCa was higher than that of other patients (85.7 vs. 66.1%; P=0.031). Excluding the effects of well-studied risk factors for recurrence by the PSM method, the present study showed that ERα and ERβ have prognostic value for non-metastatic PCa. The 5-year BCR-free survival rate is significantly higher in patients whose PCa tissue has ERα(-)/ERβ(+) staining results.
Collapse
Affiliation(s)
- Yavuz Mert Aydın
- Department of Urology, Bursa Uludag University, 16059 Bursa, Turkey,Correspondence to: Dr Yavuz Mert Aydın, Department of Urology, Bursa Uludag University, 3 Izmir Street, Gorukle Campus, 16059 Bursa, Turkey, E-mail:
| | | | - Rabia Dölek
- Department of Pathology, Bursa Uludag University, 16059 Bursa, Turkey
| | | | - Gökhan Ocakoğlu
- Department of Biostatistics, Bursa Uludag University, 16059 Bursa, Turkey
| | - Hakan Vuruşkan
- Department of Urology, Bursa Uludag University, 16059 Bursa, Turkey
| | | | - Burhan Coşkun
- Department of Urology, Bursa Uludag University, 16059 Bursa, Turkey
| |
Collapse
|
4
|
Fang J, Wang D, Kramer NI, Rietjens IMCM, Boogaard PJ, Kamelia L. The role of receptor-mediated activities of 4- and 5-ring unsubstituted and methylated polycyclic aromatic hydrocarbons (PAHs) in developmental toxicity. J Appl Toxicol 2022; 43:845-861. [PMID: 36585251 DOI: 10.1002/jat.4428] [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] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 12/11/2022] [Accepted: 12/22/2022] [Indexed: 01/01/2023]
Abstract
The present study evaluated the aryl hydrocarbon receptor (AhR), estrogen receptor-α (ER-α), and retinoic acid receptor (RAR) mediated activities of nine 4- and 5-ring unsubstituted and monomethylated polycyclic aromatic hydrocarbons (PAHs) using a series of Chemical-Activated LUciferase gene eXpression (CALUX) assays. The potential role of these aforementioned receptors in relation to the developmental toxicity of these PAHs was further assessed in the zebrafish embryotoxicity test (ZET). The results show that all nine tested PAHs were AhR agonists, benz[a]anthracene (BaA) and 8-methyl-benz[a]anthracene (8-MeBaA) were ER-α agonists, and none of the tested PAHs induced ER-α antagonistic or RAR (ant)agonistic activities. In the AhR CALUX assay, all the methylated PAHs showed higher potency (lower EC50) in activating the AhR than their respective unsubstituted PAHs, implying that the addition of a methyl substituent on the aromatic ring of PAHs could enhance their AhR-mediated activities. Co-exposure of zebrafish embryos with each individual PAH and an AhR antagonist (CH223191) counteracted the observed developmental retardations and embryo lethality to a certain extent, except for 8-methyl-benzo[a]pyrene (8-MeBaP). Co-exposure of zebrafish embryos with either of the two estrogenic PAHs (i.e., BaA and 8-MeBaA) and an ER-α antagonist (fulvestrant) neutralized embryo lethality induced by 50 μM BaA and the developmental retardations induced by 15 μM 8-MeBaA. Altogether, our findings suggest that the observed developmental retardations in zebrafish embryos by the PAH tested may partially be AhR- and/or ER-α-mediated, whereas the RAR seems not to be relevant for the PAH-induced developmental toxicity in the ZET.
Collapse
Affiliation(s)
- Jing Fang
- Division of Toxicology, Wageningen University and Research, Wageningen, 6708 WE, The Netherlands
| | - Danlei Wang
- Division of Toxicology, Wageningen University and Research, Wageningen, 6708 WE, The Netherlands
| | - Nynke I Kramer
- Division of Toxicology, Wageningen University and Research, Wageningen, 6708 WE, The Netherlands
| | - Ivonne M C M Rietjens
- Division of Toxicology, Wageningen University and Research, Wageningen, 6708 WE, The Netherlands
| | - Peter J Boogaard
- Division of Toxicology, Wageningen University and Research, Wageningen, 6708 WE, The Netherlands
| | - Lenny Kamelia
- Shell Global Solutions International B.V., The Hague, The Netherlands
| |
Collapse
|
5
|
Liu PY, Fukuma N, Hiroi Y, Kunita A, Tokiwa H, Ueda K, Kariya T, Numata G, Adachi Y, Tajima M, Toyoda M, Li Y, Noma K, Harada M, Toko H, Ushiku T, Kanai Y, Takimoto E, Liao JK, Komuro I. Tie2-Cre-Induced Inactivation of Non-Nuclear Estrogen Receptor-α Signaling Abrogates Estrogen Protection Against Vascular Injury. JACC Basic Transl Sci 2022; 8:55-67. [PMID: 36777173 PMCID: PMC9911321 DOI: 10.1016/j.jacbts.2022.07.001] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 07/07/2022] [Accepted: 07/11/2022] [Indexed: 11/18/2022]
Abstract
Using the Cre-loxP system, we generated the first mouse model in which estrogen receptor-α non-nuclear signaling was inactivated in endothelial cells. Estrogen protection against mechanical vascular injury was impaired in this model. This result indicates the pivotal role of endothelial estrogen receptor-α non-nuclear signaling in the vasculoprotective effects of estrogen.
Collapse
Key Words
- E2, 17β-estradiol
- ECGM, endothelial cell growth medium
- ER, estrogen receptor
- ERαKI/KI, estrogen receptor-αknock-in/knock-in
- LVEDD, left ventricular end-diastolic diameter
- NOS, nitric oxide synthase
- PI3K, phosphatidylinositol 3-kinase
- PLA, proximity ligation assay
- Vo2, oxygen consumption
- cDNA, complementary deoxyribonucleic acid
- eNOS, endothelial nitric oxide synthase
- endothelial cells
- estrogen receptor-α
- non-nuclear signaling
- tissue-specific regulation
Collapse
Affiliation(s)
- Pang-Yen Liu
- Division of Cardiology, Department of Internal Medicine, Tri-Service General Hospital Penghu Branch, National Defense Medical Center, Taipei, Taiwan,Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nobuaki Fukuma
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yukio Hiroi
- National Center for Global Health and Medicine, Tokyo, Japan,Vascular Medicine Research, Brigham and Women’s Hospital and Harvard Medical School, Cambridge, Massachusetts, USA
| | - Akiko Kunita
- Department of Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Hiroyuki Tokiwa
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kazutaka Ueda
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Taro Kariya
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan,Department of Anesthesiology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Genri Numata
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yusuke Adachi
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Miyu Tajima
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masayuki Toyoda
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yuxin Li
- Vascular Medicine Research, Brigham and Women’s Hospital and Harvard Medical School, Cambridge, Massachusetts, USA,Nihon University School of Medicine, Tokyo, Japan
| | - Kensuke Noma
- Vascular Medicine Research, Brigham and Women’s Hospital and Harvard Medical School, Cambridge, Massachusetts, USA,Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
| | - Mutsuo Harada
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Haruhiro Toko
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tetsuo Ushiku
- Department of Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Yoshimitsu Kanai
- Department of Anatomy and Cell Biology, Wakayama Medical University, School of Medicine, Wakayama, Japan
| | - Eiki Takimoto
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan,Division of Cardiology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA,Address for correspondence: Dr Eiki Takimoto, Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-8655, Japan.
| | - James K. Liao
- Vascular Medicine Research, Brigham and Women’s Hospital and Harvard Medical School, Cambridge, Massachusetts, USA,Section of Cardiology, Department of Medicine, The University of Chicago Medical Center, Chicago, Illinois, USA
| | - Issei Komuro
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| |
Collapse
|
6
|
Seshadri VD, Oyouni AAA, Bawazir WM, Alsagaby SA, Alsharif KF, Albrakati A, Al-Amer OM. Zingiberene exerts chemopreventive activity against 7,12-dimethylbenz(a)anthracene-induced breast cancer in Sprague-Dawley rats. J Biochem Mol Toxicol 2022; 36:e23146. [PMID: 35698847 DOI: 10.1002/jbt.23146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/16/2021] [Revised: 04/06/2022] [Accepted: 05/29/2022] [Indexed: 02/06/2023]
Abstract
Breast cancer is the primary cause of cancer-related death in females, wherein increased mortality of breast cancer patients is recorded worldwide. Zingiberene is a monocyclic sesquiterpene from the ginger plant and has many pharmacological benefits. In this exploration, we assessed the anticancer actions of Zingiberene against the 7,12-dimethylbenz(a)anthracene (DMBA)-stimulated mammary carcinogenesis in rats and MDA-MB-231 cells. Breast cancer was induced in the Female Sprague-Dawley rats through the 25 mg/kg of DMBA in 0.5 ml of corn oil and then treated with 20 and 40 mg/kg of Zingiberene, respectively. The body weight of animals and tumor volume was measured. Hematological parameters, transaminases, lipid profile, lipid peroxidation, and antioxidants status were scrutinized using standard techniques. The estrogen receptor-α and inflammatory markers were inspected by using respective assay kits. Histological damage scores were determined. In vitro experiments were conducted to scrutinize Zingiberene's effect on cell viability and apoptotic cell death in MDA-MB-231 cells. Zingiberene substantially modulated the DMBA-stimulated physiological and hematological changes and decreased the transaminases, and lipid peroxidation in the DMBA-stimulated animals. Zingiberene also elevated the antioxidant level and suppressed the inflammatory markers. Histological study revealed the protective effects of Zingiberene. The viability of MDA-MB-231 cells was noticeably diminished by the Zingiberene, thus inducing apoptotic cell death. Overall, our findings reliably proved the anticancer potential of Zingiberene against the DMBA-stimulated mammary tumorigenesis, and it could be a promising chemotherapeutic agent.
Collapse
Affiliation(s)
- Vidya Devanathadesikan Seshadri
- Department of Pharmacology & Toxicology, College of Pharmacy, Prince Sattam Bin Abdul Aziz University, Al-Kharj, Saudi Arabia
| | - Atif Abdulwahab A Oyouni
- Department of Biology, Faculty of Sciences, University of Tabuk, Tabuk, Saudi Arabia
- Genome and Biotechnology Unit, Faculty of Sciences, University of Tabuk, Tabuk, Saudi Arabia
| | - Waleed M Bawazir
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Suliman A Alsagaby
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah, Saudi Arabia
| | - Khalaf F Alsharif
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Ashraf Albrakati
- Department of Human Anatomy, College of Medicine, Taif University, Taif, Saudi Arabia
| | - Osama M Al-Amer
- Genome and Biotechnology Unit, Faculty of Sciences, University of Tabuk, Tabuk, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk, Saudi Arabia
| |
Collapse
|
7
|
Kumagai H, Miyamoto-Mikami E, Takaragawa M, Kuriki K, Goto C, Shibata K, Yamada N, Hosono A, Fuku M, Suzuki S, Fuku N. Genetic polymorphisms in CYP19A1 and ESR1 are associated with serum CK activity after prolonged running in men. J Appl Physiol (1985) 2022; 132:966-973. [PMID: 35175101 DOI: 10.1152/japplphysiol.00374.2021] [Citation(s) in RCA: 2] [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] [Indexed: 11/22/2022] Open
Abstract
This study aimed to clarify 1) the influence of genetic polymorphisms in the cytochrome P450 aromatase gene (CYP19A1) on circulating estradiol levels in men and 2) whether estrogen-related genetic polymorphisms, such as the CYP19A1 rs936306 and estrogen receptor-α (ESR1) rs2234693 polymorphisms, predict exercise-induced muscle damage. Serum estradiol levels were examined in young men (n = 167). In a different cohort, serum creatine kinase (CK) activity, an index of skeletal muscle membrane disruption, was analyzed in a 2-days ultramarathon race: baseline, after the first day, and after the second day (114 males and 25 females). Genetic polymorphisms in CYP19A1 rs936306 C/T and ESR1 rs2234693 T/C were analyzed using the TaqMan SNP genotyping assay. Male subjects with the TT genotype of the CYP19A1 polymorphism exhibited significantly higher serum estradiol levels than the C allele carriers. Male runners had significantly higher post-race serum CK activity than female runners. The change in the CK activity during the ultramarathon race was significantly lower in male subjects with the CYP19A1 TT genotype than in those with the CC+CT genotypes, and was correlated with the number of C alleles in ESR1 rs2234693 in male subjects. Furthermore, the genotype scores of these two polymorphisms were significantly correlated with changes in serum CK activity during race (r = ‒0.279, P = 0.003). The results of this study suggest that genetic polymorphisms in CYP19A1 rs936306 influence serum estradiol levels in men, and genetic polymorphisms in CYP19A1 and ESR1 are associated with serum CK activity in men.
Collapse
Affiliation(s)
- Hiroshi Kumagai
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Japan
| | - Eri Miyamoto-Mikami
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Japan
| | - Mizuki Takaragawa
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Japan
| | - Kiyonori Kuriki
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
| | - Chiho Goto
- Faculty of Health and Human Life, Nagoya Bunri University, Inazawa, Japan
| | - Kiyoshi Shibata
- Department of Human Life and Sciences, Nagoya University of Economics, Nagoya, Japan
| | - Norihiro Yamada
- Faculty of Agriculture, Setsunan University, Neyagawa, Japan
| | - Akihiro Hosono
- Atsuta Health Center, City of Nagoya, Japan.,Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Mizuho Fuku
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Japan.,Department of Rehabilitation Medicine, Tsudanuma Central General Hospital, Narashino, Japan
| | - Sadao Suzuki
- Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Noriyuki Fuku
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Japan
| |
Collapse
|
8
|
Arslan HS, Nursal AF, Inanir A, Karakus N, Yigit S. Influence of ESR1 Variants on Clinical Characteristics and Fibromyalgia Syndrome in Turkish Women. Endocr Metab Immune Disord Drug Targets 2021; 21:1326-1332. [PMID: 32914729 DOI: 10.2174/1871530320666200910110915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/15/2020] [Revised: 07/21/2020] [Accepted: 07/29/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Fibromyalgia syndrome (FMS) is characterized by widespread musculoskeletal pain. It is more common in women than in men, and sex hormones may play a role in this predominance. Therefore, this research investigated the clinical findings among Turkish females and whether Estrogen-α (ESR1) gene variants are associated with FMS. METHODS A total of 219 individuals were enrolled in this study. ESR1 variants (PvuII/XbaI) were genotyped using PCR-RFLP methods. The results of the analyses were evaluated for statistical significance. RESULTS There was a significant association between the ESR1 PvuII and FMS risk among Turkish women. The ESR1 PvuII CC genotype and C allele were higher in the patients than those in the controls (p=0.021, p=0.007, respectively). A more statistically significant association was observed between the patients and the controls in terms of TT genotype vs. TC+CC genotypes (p=0.022). Also, there was a statistically significant association between the patients and the controls in terms of TT+TC genotype vs. CC genotypes (p =0.028). There was no significant association between patients and the control group concerning the genotype distribution and allele frequencies of ESR1 XbaI (p>0.05). Headache was seen more frequently in the XbaI GA genotype (p=0.025), while XbaI AA genotype was associated with dysmenorrhea in patients with FMS (p=0.041). CONCLUSION Our results indicate that ESR1 PvuII/XbaI variants are possibly effective in the development of FMS and some clinical features.
Collapse
Affiliation(s)
- Habibe S Arslan
- Department of Medical Biology and Genetics, Akdeniz University, Faculty of Medicine, Antalya, Turkey
| | - Ayse F Nursal
- Department of Medical Genetics, Hitit University, Facultyof Medicine, Corum, Turkey
| | - Ahmet Inanir
- Department of Physical Medicineand Rehabilitation, Special Academic Pain Center, Samsun, Turkey
| | - Nevin Karakus
- Department of Medical Biology,Gaziosmanpasa University, Faculty of Medicine, Tokat, Turkey
| | - Serbulent Yigit
- Department of Medical Biology,Gaziosmanpasa University, Faculty of Medicine, Tokat, Turkey
| |
Collapse
|
9
|
Wang J, Hu L, Liu Z, Wang H, Zhang H, Song X, Sun X, Wang D. Identification of Heat Shock Protein 90 as a Recurrence Related Marker in Juvenile Nasopharyngeal Angiofibroma. Am J Rhinol Allergy 2021; 36:8-17. [PMID: 33940949 DOI: 10.1177/19458924211012820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/01/2023]
Abstract
BACKGROUND Juvenile nasopharyngeal angiofibroma (JNA) is a highly recurrent tumor after curative surgery. OBJECTIVE The purpose of this study was to evaluate heat shock protein 90 (HSP90) expression in JNA and its association with tumor recurrence. METHODS Immunohistochemistry was performed to assess HSP90 expression using tissue microarrays containing 70 JNA patients and 10 control subjects. The associations of HSP90 expression with clinicopathological features and tumor recurrence were analyzed. RESULTS Immunohistochemistry revealed high HSP90 expression in JNA compared with normal middle turbinate samples. High expression of HSP90, which correlated with MVD (P = .001), ER-α (P = .001), VEGF (P < .001) and JNA recurrence (P = .009), was an independent prognostic factor of time to recurrence (P = .017). The combination of HSP90 and ER-α had a better power to predict disease recurrence than other clinicopathological features (P = .008). CONCLUSIONS HSP90 may be an independent prognostic marker in JNA patients administered surgical treatment. Combination of HSP90 and ER-α expression may be the best predictor of tumor recurrence among all clinicopathological factors.
Collapse
Affiliation(s)
- Jingjing Wang
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Li Hu
- Department of Experimental Center, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Zhuofu Liu
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Huan Wang
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Huankang Zhang
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Xiaole Song
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - XiCai Sun
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - DeHui Wang
- Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| |
Collapse
|
10
|
Abstract
Epidemiological data have indicated that there are some sex-related differences in bladder cancer. Indeed, the incidence of bladder cancer in men has been substantially higher than that in women throughout the world, while women tend to have higher stage disease and poorer prognosis. These gender disparities have prompted to investigate sex hormones and their cognitive receptors in bladder cancer. Specifically, estrogen receptors, including estrogen receptor-α and estrogen receptor-β, have been shown to contribute to urothelial carcinogenesis and cancer progression, as well as to modulating chemosensitivity in bladder cancer, although conflicting findings exist. Meanwhile, immunohistochemical studies in surgical specimens have assessed the expression of estrogen receptors and related proteins as well as its associations with clinicopathologic features of bladder cancer and patient outcomes. This review article summarizes and discusses available data indicating that estrogen receptor signaling plays an important role in urothelial cancer.
Collapse
Affiliation(s)
- Takuro Goto
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, United States
- James P. Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, United States
| | - Hiroshi Miyamoto
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, United States
- James P. Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, United States
- Department of Urology, University of Rochester Medical Center, Rochester, NY, United States
- *Correspondence: Hiroshi Miyamoto,
| |
Collapse
|
11
|
Gustafsson KL, Farman HH, Nilsson KH, Henning P, Movérare-Skrtic S, Lionikaite V, Lawenius L, Engdahl C, Ohlsson C, Lagerquist MK. Arginine site 264 in murine estrogen receptor-α is dispensable for the regulation of the skeleton. Am J Physiol Endocrinol Metab 2021; 320:E160-E168. [PMID: 33225718 DOI: 10.1152/ajpendo.00349.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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] [Indexed: 12/29/2022]
Abstract
Mutation of arginine 264 in ERα has been shown to abrogate rapid membrane ERα-mediated endothelial effects. Our novel finding that mutation of R264 is dispensable for ERα-mediated skeletal effects supports the concept that R264 determines tissue specificity of ERα. Estrogen protects against bone loss but is not a suitable treatment due to adverse effects in other tissues. Therefore, increased knowledge regarding estrogen signaling in estrogen-responsive tissues is warranted to aid the development of bone-specific estrogen treatments. Estrogen receptor-α (ERα), the main mediator of estrogenic effects in bone, is widely subjected to posttranslational modifications (PTMs). In vitro studies have shown that methylation at site R260 in the human ERα affects receptor localization and intracellular signaling. The corresponding amino acid R264 in murine ERα has been shown to have a functional role in endothelium in vivo, although the methylation of R264 in the murine gene is yet to be empirically demonstrated. The aim of this study was to investigate whether R264 in ERα is involved in the regulation of the skeleton in vivo. Dual-energy X-ray absorptiometry (DEXA) analysis at 3, 6, 9, and 12 mo of age showed no differences in total body areal bone mineral density (BMD) between R264A and wild type (WT) in either female or male mice. Furthermore, analyses using computed tomography (CT) demonstrated that trabecular bone mass in tibia and vertebra and cortical thickness in tibia were similar between R264A and WT mice. In addition, R264A females displayed a normal estrogen treatment response in trabecular bone mass as well as in cortical thickness. Furthermore, uterus, thymus, and adipose tissue responded similarly in R264A and WT female mice after estrogen treatment. In conclusion, our novel finding that mutation of R264 in ERα does not affect the regulation of the skeleton, together with the known role of R264 for ERα-mediated endothelial effects, supports the concept that R264 determines tissue specificity of ERα.NEW & NOTEWORTHY Mutation of arginine 264 in ERα has been shown to abrogate rapid membrane ERα-mediated endothelial effects. Our novel finding that mutation of R264 is dispensable for ERα-mediated skeletal effects supports the concept that R264 determines tissue specificity of ERα.
Collapse
Affiliation(s)
- Karin L Gustafsson
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Helen H Farman
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Karin H Nilsson
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Petra Henning
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Sofia Movérare-Skrtic
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Vikte Lionikaite
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Lina Lawenius
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Cecilia Engdahl
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Claes Ohlsson
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Pharmacology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Marie K Lagerquist
- Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
12
|
Cheng TC, Philip JL, Tabima DM, Kumari S, Yakubov B, Frump AL, Hacker TA, Bellofiore A, Li R, Sun X, Goss KN, Lahm T, Chesler NC. Estrogen receptor-α prevents right ventricular diastolic dysfunction and fibrosis in female rats. Am J Physiol Heart Circ Physiol 2020; 319:H1459-H1473. [PMID: 33064565 DOI: 10.1152/ajpheart.00247.2020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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] [Indexed: 12/24/2022]
Abstract
Although women are more susceptible to pulmonary arterial hypertension (PAH) than men, their right ventricular (RV) function is better preserved. Estrogen receptor-α (ERα) has been identified as a likely mediator for estrogen protection in the RV. However, the role of ERα in preserving RV function and remodeling during pressure overload remains poorly understood. We hypothesized that loss of functional ERα removes female protection from adverse remodeling and is permissive for the development of a maladapted RV phenotype. Male and female rats with a loss-of-function mutation in ERα (ERαMut) and wild-type (WT) littermates underwent RV pressure overload by pulmonary artery banding (PAB). At 10 wk post-PAB, WT and ERαMut demonstrated RV hypertrophy. Analysis of RV pressure waveforms demonstrated RV-pulmonary vascular uncoupling and diastolic dysfunction in female, but not male, ERαMut PAB rats. Similarly, female, but not male, ERαMut exhibited increased RV fibrosis, comprised primarily of thick collagen fibers. There was an increased protein expression ratio of TIMP metallopeptidase inhibitor 1 (Timp1) to matrix metalloproteinase 9 (Mmp9) in female ERαMut compared with WT PAB rats, suggesting less collagen degradation. RNA-sequencing in female WT and ERαMut RV revealed kallikrein-related peptidase 10 (Klk10) and Jun Proto-Oncogene (Jun) as possible mediators of female RV protection during PAB. In summary, ERα in females is protective against RV-pulmonary vascular uncoupling, diastolic dysfunction, and fibrosis in response to pressure overload. ERα appears to be dispensable for RV adaptation in males. ERα may be a mediator of superior RV adaptation in female patients with PAH.NEW & NOTEWORTHY Using a novel loss-of-function mutation in estrogen receptor-α (ERα), we demonstrate that female, but not male, ERα mutant rats display right ventricular (RV)-vascular uncoupling, diastolic dysfunction, and fibrosis following pressure overload, indicating a sex-dependent role of ERα in protecting against adverse RV remodeling. TIMP metallopeptidase inhibitor 1 (Timp1), matrix metalloproteinase 9 (Mmp9), kallikrein-related peptidase 10 (Klk10), and Jun Proto-Oncogene (Jun) were identified as potential mediators in ERα-regulated pathways in RV pressure overload.
Collapse
Affiliation(s)
- Tik-Chee Cheng
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin
| | - Jennifer L Philip
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin
| | - Diana M Tabima
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin
| | - Santosh Kumari
- Division of Allergy, Pulmonary and Critical Care Medicine, University of Wisconsin-Madison, Madison, Wisconsin.,Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Bakhtiyor Yakubov
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Andrea L Frump
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Timothy A Hacker
- Cardiovascular Research Center, University of Wisconsin-Madison, Madison, Wisconsin
| | - Alessandro Bellofiore
- Department of Biomedical, Chemical and Materials Engineering, San Jose State University, San Jose, California
| | - Rongbo Li
- Department of Pediatrics, University of California San Diego, La Jolla, California
| | - Xin Sun
- Department of Pediatrics, University of California San Diego, La Jolla, California
| | - Kara N Goss
- Division of Allergy, Pulmonary and Critical Care Medicine, University of Wisconsin-Madison, Madison, Wisconsin.,Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Tim Lahm
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana.,Department of Cellular and Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, Indiana.,Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana
| | - Naomi C Chesler
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin.,Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| |
Collapse
|
13
|
Li S, Zhai J, Xu B, Liu J, Chu W, Wang D, Geng X, Chen ZJ, Du Y. Erythropoietin-producing hepatocellular receptor A7 restrains estrogen negative feedback of luteinizing hormone via ephrin A5 in the hypothalamus of female rats. Am J Physiol Endocrinol Metab 2020; 319:E81-E90. [PMID: 32396496 DOI: 10.1152/ajpendo.00046.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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] [Indexed: 01/29/2023]
Abstract
We have previously shown that systemic injection of erythropoietin-producing hepatocellular receptor A7 (EPHA7)-Fc raises serum luteinizing hormone (LH) levels before ovulation in female rats, indicating the induction of EPHA7 in ovulation. In this study, we aimed to identify the mechanism and hypothalamus-pituitary-ovary (HPO) axis level underlying the promotion of LH secretion by EPHA7. Using an ovariectomized (OVX) rat model, in conjunction with low-dose 17β-estradiol (E2) treatment, we investigated the association between EPHA7-ephrin (EFN)A5 signaling and E2 negative feedback. Various rat models (OVX, E2-treated OVX, and abarelix treated) were injected with the recombinant EPHA7-Fc protein through the caudal vein to investigate the molecular mechanism underlying the promotion of LH secretion by EPHA7. Efna5 was observed strongly expressed in the arcuate nucleus of the female rat by using RNAscope in situ hybridization. Our results indicated that E2, combined with estrogen receptor (ER)α, but not ERβ, inhibited Efna5 and gonadotropin-releasing hormone 1 (Gnrh1) expressions in the hypothalamus. In addition, the systemic administration of EPHA7-Fc restrained the inhibition of Efna5 and Gnrh1 by E2, resulting in increased Efna5 and Gnrh1 expressions in the hypothalamus as well as increased serum LH levels. Collectively, our findings demonstrated the involvement of EPHA7-EFNA5 signaling in the regulation of LH and the E2 negative feedback pathway in the hypothalamus, highlighting the functional role of EPHA7 in female reproduction.
Collapse
Affiliation(s)
- Shang Li
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Junyu Zhai
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Bing Xu
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Jiansheng Liu
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Weiwei Chu
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Dongshuang Wang
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Xueying Geng
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
- Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
| | - Yanzhi Du
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai, Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| |
Collapse
|
14
|
Yu J, Berga SL, Zou W, Taylor RN. Interleukin-1β inhibits estrogen receptor-α, progesterone receptors A and B and biomarkers of human endometrial stromal cell differentiation: implications for endometriosis. Mol Hum Reprod 2020; 25:625-637. [PMID: 31408162 DOI: 10.1093/molehr/gaz045] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 04/30/2019] [Revised: 06/22/2019] [Indexed: 02/06/2023] Open
Abstract
Human blastocyst nidation in the uterus and successful pregnancy require coordinated endometrial expression of estrogen receptor (ER)-α, progesterone receptors (PR)-A and -B and the gap junction protein, connexin (Cx)43. Our prior work established that inflammation associated with conditions of reduced fecundity, particularly endometriosis, can perturb eutopic decidual function. In the current studies, we have modeled endometrial decidualization in primary human endometrial stromal cell cultures derived from normal controls (NESC) and from the eutopic endometria of women with endometriosis (EESC) to test the hypothesis that a proinflammatory cytokine, interleukin (IL)-1β, can disrupt stromal cell differentiation. The cells were grown under a standard protocol with hormones (10 nM 17β-estradiol, 100 nM progesterone and 0.5 mM dibutyryl cAMP) for up to 7 days in the absence or presence of IL-1β. Time-course experiments showed that IL-1β compromised decidual function in both NESC and EESC, which was accompanied by rapid phosphorylation of ER-α, PR and Cx43 and their cellular depletion. Inhibition of the extracellular signal-regulated kinase (ERK)1/2 pathway by a selective pharmacological blocker (PD98059) or siRNA interference, or the addition of hormones themselves, blocked the phosphorylation of ERK mediators; increased the production of steroid receptors, Cx43, prolactin, insulin-like growth factor binding protein-1 (IGFBP)-1 and vascular endothelial growth factor (VEGF) and accelerated the differentiation. The results indicate that inhibition of IL-1β can enhance decidualization in NESC and EESC in vitro. Strategies to interfere with this pathway might be implemented as an in vivo approach to enhance fertility in women with endometriosis and, potentially, other inflammatory pathologies.
Collapse
Affiliation(s)
- Jie Yu
- Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Sarah L Berga
- Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.,Department of Obstetrics and Gynecology, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
| | - Wei Zou
- Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China
| | - Robert N Taylor
- Department of Obstetrics and Gynecology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.,Department of Obstetrics and Gynecology, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
| |
Collapse
|
15
|
Meng D, Lei H, Zheng X, Han Y, Sun R, Zhao D, Liu R. A temperature-sensitive phase-change hydrogel of tamoxifen achieves the long-acting antitumor activation on breast cancer cells. Onco Targets Ther 2019; 12:3919-3931. [PMID: 31213826 PMCID: PMC6538837 DOI: 10.2147/ott.s201421] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 01/13/2019] [Accepted: 04/16/2019] [Indexed: 12/24/2022] Open
Abstract
Background: Breast cancer is one of the foremost threats to female health nowadays. Tamoxifen, an antagonist of estrogen receptor-α (ERα), is the first choice for endocrine-dependent breast cancer (ERα-positive breast cancer) treatment. However, ERα has an important function in the normal physical regulation of estrogen, and current oral administration of tamoxifen has potential side effects on normal endocrine secretion. In the present work, we aim to develop novel approaches to increase the antitumor effect of tamoxifen on breast cancer cells and decrease the potential side effects in the human body during treatment. Methods: A temperature-sensitive phase-change hydrogel for tamoxifen (Tam-Gel) was generated. After establishing subcutaneous tumors formed by MCF-7, an ERα-positive breast cancer cell line, in nude mice, an intratumoral injection of Tam-Gel was performed to examine whether Tam-Gel facilitated the slow-release or antitumor effect of tamoxifen. A metastatic breast cancer model was established using the intrahepatic growth of MCF-7 cells in immunodeficient rats. Results: Tam-Gel can transform from liquid to hydrogel at room temperature. An intratumoral injection of Tam-Gel facilitated the slow-release or antitumor effect of tamoxifen. Once Tam-Gel, but not Tam-Sol, was administered by intratumoral injection, it significantly decreased the uptake of radionuclide probes (18F-fluoroestradiol or 18F-fluorodeoxyglucose) by cells in rats' livers and the intrahepatic growth of MCF-7 cells in rats' livers. Conclusion: A novel slow-release system was successfully prepared to facilitate the long-term release of tamoxifen in breast cancer tissues, and achieved an antitumor effect in the long term.
Collapse
Affiliation(s)
- Du Meng
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Hongwei Lei
- Department of Radio Oncology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, 116027, People's Republic of China
| | - Xiaoqiang Zheng
- Department of Medical Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Yaxuan Han
- Department of Oncology, The Xi'an Chest Hospital, Xi'an, Shaanxi Province, 710000, People's Republic of China
| | - Ronggang Sun
- Department of Radio Oncology, The People's Hospital of YangZhong City, YangZhong, Jiangsu Province, 212200, People's Republic of China
| | - Dongli Zhao
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Rui Liu
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi Province, 710061, People's Republic of China
| |
Collapse
|
16
|
Gonzalez TL, Rae JM, Colacino JA, Richardson RJ. Homology models of mouse and rat estrogen receptor- α ligand-binding domain created by in silico mutagenesis of a human template: molecular docking with 17ß-estradiol, diethylstilbestrol, and paraben analogs. Comput Toxicol 2019; 10:1-16. [PMID: 30740556 PMCID: PMC6363358 DOI: 10.1016/j.comtox.2018.11.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Crystal structures exist for human, but not rodent, estrogen receptor-α ligand-binding domain (ERα-LBD). Consequently, rodent studies involving binding of compounds to ERα-LBD are limited in their molecular-level interpretation and extrapolation to humans. Because the sequences of rodent and human ERα-LBDs are > 95% identical, we expected their 3D structures and ligand binding to be highly similar. To test this hypothesis, we used the human ERα-LBD structure (PDB 3UUD) as a template to produce rat and mouse homology models. Employing the rodent models and human structure, we generated docking poses of 23 Group A ligands (17ß-estradiol, diethylstilbestrol, and 21 paraben analogs) in AutoDock Vina for interspecies comparisons. Ligand RMSDs (Å) (median, 95% CI) were 0.49 (0.21-1.82) (human-mouse) and 1.19 (0.22-1.82) (human-rat), well below the 2.0-2.5 Å range for equivalent docking poses. Numbers of interspecies ligand-receptor residue contacts were highly similar, with Sorensen Sc (%) = 96.8 (90.0-100) (human-mouse) and 97.7 (89.5-100) (human-rat). Likewise, numbers of interspecies ligand-receptor residue contacts were highly correlated: Pearson r = 0.913 (human-mouse) and 0.925 (human-rat). Numbers of interspecies ligand-receptor atom contacts were even more tightly correlated: r = 0.979 (human-mouse) and 0.986 (human-rat). Pyramid plots of numbers of ligand-receptor atom contacts by residue exhibited high interspecies symmetry and had Spearman r s = 0.977 (human-mouse) and 0.966 (human-rat). Group B ligands included 15 ring-substituted parabens recently shown experimentally to exhibit decreased binding to human ERα and to exert increased antimicrobial activity. Ligand efficiencies calculated from docking ligands into human ERα-LBD were well correlated with those derived from published experimental data (Pearson partial r p = 0.894 and 0.918; Groups A and B, respectively). Overall, the results indicate that our constructed rodent ERα-LBDs interact with ligands in like manner to the human receptor, thus providing a high level of confidence in extrapolations of rodent to human ligand-receptor interactions.
Collapse
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 and Oncology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan 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
| | - Rudy J. Richardson
- Department of Environmental Health 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
- Department of Neurology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| |
Collapse
|
17
|
Ma L, Yin W, Ma H, Elshoura I, Wang L. Targeting claudin-3 suppresses stem cell-like phenotype in nonsquamous non-small-cell lung carcinoma. Lung Cancer Manag 2019; 8:LMT04. [PMID: 31044015 PMCID: PMC6488947 DOI: 10.2217/lmt-2018-0010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 11/08/2018] [Indexed: 12/24/2022] Open
Abstract
Aim: To determine the role of claudin-3 in cancer stemness in nonsquamous non-small-cell lung carcinoma (NSCLC). Materials & methods: In vitro/vivo extreme limiting dilution analysis and the side population assay were used to investigate the role of claudin-3 in regulating cancer stemness in nonsquamous NSCLC. Results & conclusion: Claudin-3 depletion decreased the formation rates of spheres and tumors and increased cisplatin sensitivity. Claudin-3 was also identified as one downstream target of estrogen receptor-α in regulating cancer stemness. Moreover, targeting CLDN-3 transcription by small molecules including withaferin A, estradiol and fulvestrant suppressed cancer stemness and reversed chemoresistance. These results demonstrated claudin-3 is one positive regulator of cancer stemness in nonsuqamous NSCLC.
Collapse
Affiliation(s)
- Lin Ma
- School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China.,R&D Center, Guangzhou Ribobio Co., Ltd, Guangzhou 510663, China.,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210046, China.,School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China.,R&D Center, Guangzhou Ribobio Co., Ltd, Guangzhou 510663, China.,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210046, China
| | - Wu Yin
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210046, China.,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210046, China
| | - Heliang Ma
- Department of Radiology, Jinan Central Hospital, Jinan, Shandong 250013, China.,Department of Radiology, Jinan Central Hospital, Jinan, Shandong 250013, China
| | - Ihab Elshoura
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210046, China.,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210046, China
| | - Lan Wang
- Department of Respiratory Medicine, The Affiliated Jiangyin Hospital of Southeast University, Jiangyin 214400, China.,Department of Respiratory Medicine, The Affiliated Jiangyin Hospital of Southeast University, Jiangyin 214400, China
| |
Collapse
|
18
|
Panigrahi AK, Foulds CE, Lanz RB, Hamilton RA, Yi P, Lonard DM, Tsai MJ, Tsai SY, O'Malley BW. SRC-3 Coactivator Governs Dynamic Estrogen-Induced Chromatin Looping Interactions during Transcription. Mol Cell 2019; 70:679-694.e7. [PMID: 29775582 DOI: 10.1016/j.molcel.2018.04.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 01/18/2017] [Revised: 02/15/2018] [Accepted: 04/18/2018] [Indexed: 01/09/2023]
Abstract
Enhancers are thought to activate transcription by physically contacting promoters via looping. However, direct assays demonstrating these contacts are required to mechanistically verify such cellular determinants of enhancer function. Here, we present versatile cell-free assays to further determine the role of enhancer-promoter contacts (EPCs). We demonstrate that EPC is linked to mutually stimulatory transcription at the enhancer and promoter in vitro. SRC-3 was identified as a critical looping determinant for the estradiol-(E2)-regulated GREB1 locus. Surprisingly, the GREB1 enhancer and promoter contact two internal gene body SRC-3 binding sites, GBS1 and GBS2, which stimulate their transcription. Utilizing time-course 3C assays, we uncovered SRC-3-dependent dynamic chromatin interactions involving the enhancer, promoter, GBS1, and GBS2. Collectively, these data suggest that the enhancer and promoter remain "poised" for transcription via their contacts with GBS1 and GBS2. Upon E2 induction, GBS1 and GBS2 disengage from the enhancer, allowing direct EPC for active transcription.
Collapse
Affiliation(s)
- Anil K Panigrahi
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Charles E Foulds
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA; Center for Precision Environmental Health, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Rainer B Lanz
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Ross A Hamilton
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Ping Yi
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - David M Lonard
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Ming-Jer Tsai
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Sophia Y Tsai
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Bert W O'Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
| |
Collapse
|
19
|
Winn NC, Jurrissen TJ, Grunewald ZI, Cunningham RP, Woodford ML, Kanaley JA, Lubahn DB, Manrique-Acevedo C, Rector RS, Vieira-Potter VJ, Padilla J. Estrogen receptor-α signaling maintains immunometabolic function in males and is obligatory for exercise-induced amelioration of nonalcoholic fatty liver. Am J Physiol Endocrinol Metab 2019; 316:E156-E167. [PMID: 30512987 PMCID: PMC6397364 DOI: 10.1152/ajpendo.00259.2018] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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] [Indexed: 02/08/2023]
Abstract
The role of estrogen receptor-α (ERα) signaling in immunometabolic function is established in females. However, its necessity in males, while appreciated, requires further study. Accordingly, we first determined whether lower metabolic function in male mice compared with females is related to reduced ERα expression. ERα protein expression in metabolically active tissues was lower in males than in females, and this lower expression was associated with worse glucose tolerance. Second, we determined whether ERα is required for optimal immunometabolic function in male mice consuming a chow diet. Despite lower expression of ERα in males, its genetic ablation (KO) caused an insulin-resistant phenotype characterized by enhanced adiposity, glucose intolerance, hepatic steatosis, and metaflammation in adipose tissue and liver. Last, we determined whether ERα is essential for exercise-induced metabolic adaptations. Twelve-week-old wild-type (WT) and ERα KO mice either remained sedentary (SED) or were given access to running wheels (WR) for 10 wk while fed an obesogenic diet. Body weight and fat mass were lower in WR mice regardless of genotype. Daily exercise obliterated immune cell infiltration and inflammatory gene transcripts in adipose tissue in both genotypes. In the liver, however, wheel running suppressed hepatic steatosis and inflammatory gene transcripts in WT but not in KO mice. In conclusion, the present findings indicate that ERα is required for optimal immunometabolic function in male mice despite their reduced ERα protein expression in metabolically active tissues. Furthermore, for the first time, we show that ERα signaling appears to be obligatory for exercise-induced prevention of hepatic steatosis.
Collapse
Affiliation(s)
- Nathan C Winn
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
| | - Thomas J Jurrissen
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
| | - Zachary I Grunewald
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
| | - Rory P Cunningham
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
| | - Makenzie L Woodford
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
| | - Jill A Kanaley
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
| | - Dennis B Lubahn
- Department of Biochemistry, University of Missouri , Columbia, Missouri
| | - Camila Manrique-Acevedo
- Department of Medicine, Division of Endocrinology, University of Missouri , Columbia, Missouri
| | - R Scott Rector
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
- Department of Medicine, Division of Gastroenterology and Hepatology, University of Missouri , Columbia, Missouri
- Research Service, Harry S. Truman Memorial Hospital, University of Missouri , Columbia, Missouri
| | | | - Jaume Padilla
- Department of Nutrition and Exercise Physiology, University of Missouri , Columbia, Missouri
- Department of Child Health, University of Missouri , Columbia, Missouri
- Dalton Cardiovascular Research Center, University of Missouri , Columbia, Missouri
| |
Collapse
|
20
|
Zhao H, Zhou L, Li L, Coon V J, Chatterton RT, Brooks DC, Jiang E, Liu L, Xu X, Dong Z, DeMayo FJ, Stulberg JJ, Tourtellotte WG, Bulun SE. Shift from androgen to estrogen action causes abdominal muscle fibrosis, atrophy, and inguinal hernia in a transgenic male mouse model. Proc Natl Acad Sci U S A 2018; 115:E10427-36. [PMID: 30327348 DOI: 10.1073/pnas.1807765115] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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] [Indexed: 12/21/2022] Open
Abstract
Inguinal hernia is one of the most common disorders that affect elderly men. A major pathology underlying inguinal hernia is the fibrosis and other degenerative changes that affect the lower abdominal muscle strength adjacent to the inguinal canal. Here we describe a critical role of estrogen and its nuclear receptor that enhance fibroblast proliferation and muscle atrophy, leading to inguinal hernia. Further research may reveal a potential role of estrogen ablation to prevent muscle fibrosis or hernia in a subset of elderly men. Inguinal hernia develops primarily in elderly men, and more than one in four men will undergo inguinal hernia repair during their lifetime. However, the underlying mechanisms behind hernia formation remain unknown. It is known that testosterone and estradiol can regulate skeletal muscle mass. We herein demonstrate that the conversion of testosterone to estradiol by the aromatase enzyme in lower abdominal muscle (LAM) tissue causes intense fibrosis, leading to muscle atrophy and inguinal hernia; an aromatase inhibitor entirely prevents this phenotype. LAM tissue is uniquely sensitive to estradiol because it expresses very high levels of estrogen receptor-α. Estradiol acts via estrogen receptor-α in LAM fibroblasts to activate pathways for proliferation and fibrosis that replaces atrophied myocytes, resulting in hernia formation. This is accompanied by decreased serum testosterone and decreased expression of the androgen receptor target genes in LAM tissue. These findings provide a mechanism for LAM tissue fibrosis and atrophy and suggest potential roles of future nonsurgical and preventive approaches in a subset of elderly men with a predisposition for hernia development.
Collapse
|
21
|
Maczis MA, Maceyka M, Waters MR, Newton J, Singh M, Rigsby MF, Turner TH, Alzubi MA, Harrell JC, Milstien S, Spiegel S. Sphingosine kinase 1 activation by estrogen receptor α36 contributes to tamoxifen resistance in breast cancer. J Lipid Res 2018; 59:2297-2307. [PMID: 30315000 DOI: 10.1194/jlr.m085191] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 03/19/2018] [Revised: 10/04/2018] [Indexed: 01/01/2023] Open
Abstract
In breast cancer, 17β-estradiol (E2) plays critical roles mainly by binding to its canonical receptor, estrogen receptor (ER) α66, and eliciting genomic effects. E2 also triggers rapid, nongenomic responses. E2 activates sphingosine kinase 1 (SphK1), increasing sphingosine-1-phosphate (S1P) that binds to its receptors, leading to important breast cancer signaling. However, the E2 receptor responsible for SphK1 activation has not yet been identified. Here, we demonstrate in triple-negative breast cancer cells, which lack the canonical ERα66 but express the novel splice variant ERα36, that ERα36 is the receptor responsible for E2-induced activation of SphK1 and formation and secretion of S1P and dihydro-S1P, the ligands for S1PRs. Tamoxifen, the first-line endocrine therapy for breast cancer, is an antagonist of ERα66, but an agonist of ERα36, and, like E2, activates SphK1 and markedly increases secretion of S1P. A major problem with tamoxifen therapy is development of acquired resistance. We found that tamoxifen resistance correlated with increased SphK1 and ERα36 expression in tamoxifen-resistant breast cancer cells, in patient-derived xenografts, and in endocrine-resistant breast cancer patients. Our data also indicate that targeting this ERα36 and SphK1 axis may be a therapeutic option to circumvent endocrine resistance and improve patient outcome.
Collapse
Affiliation(s)
- Melissa A Maczis
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Michael Maceyka
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Michael R Waters
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Jason Newton
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Manjulata Singh
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Madisyn F Rigsby
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Tia H Turner
- Department of Pathology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Mohammad A Alzubi
- Department of Pathology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - J Chuck Harrell
- Department of Pathology and the Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Sheldon Milstien
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| | - Sarah Spiegel
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University School of Medicine, Richmond, VA 23298
| |
Collapse
|
22
|
Taha MM, Mahdy-Abdallah H, Shahy EM, Ibrahim KS, Elserougy S. Impact of occupational cadmium exposure on bone in sewage workers. Int J Occup Environ Health 2018; 24:101-108. [PMID: 30222069 DOI: 10.1080/10773525.2018.1518745] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cadmium (Cd) is one of the environmental risk factors for bone loss. The present study included 40 sewage workers occupationally exposed to Cd. Forty nonexposed men were included as a control group. Current smokers represented 65% and 47.5% of the exposed and control groups, respectively. The study aimed to investigate the hazard of occupational Cd exposure on bone health. This was achieved through measuring serum and urinary Cd, and calcium (Ca), in addition to serum osteoprotegerin (OPG) and estrogen receptor-α gene. Results showed significant elevation in serum Cd, OPG, and urinary Ca levels in the exposed compared to the controls. Bony aches and joint pain were more prevalent among the exposed workers. Serum and urinary Cd increased in exposed smokers relative to control smokers. Also, serum OPG levels showed significant rise among exposed smoker and nonsmoker compared to control smoker and nonsmoker groups. Serum Cd level increased significantly in PP and pp genotypes in exposed workers compared to controls, while elevated levels of serum OPG was observed in PP and Pp genotypes in exposed workers relative to controls. Urinary Cd exhibited significant rise in both PP and pp genotypes in exposed workers, while Ca excretion was elevated in pp genotype only. The study reflected an association of genetic predisposition and Cd exposure in progression of osteoporosis. Further research is needed to explain the mechanisms of Cd impact on bone. The role of smoking is important and hence smoking cessation programs are essential for sewage workers.
Collapse
Affiliation(s)
- Mona M Taha
- a Environmental and Occupational Medicine Department , National Research Centre , Giza , Egypt
| | - Heba Mahdy-Abdallah
- a Environmental and Occupational Medicine Department , National Research Centre , Giza , Egypt
| | - Eman M Shahy
- a Environmental and Occupational Medicine Department , National Research Centre , Giza , Egypt
| | - Khadiga S Ibrahim
- a Environmental and Occupational Medicine Department , National Research Centre , Giza , Egypt
| | - Safaa Elserougy
- a Environmental and Occupational Medicine Department , National Research Centre , Giza , Egypt
| |
Collapse
|
23
|
Zhu H, Huang Y, Su H, Ma Y, Tao Y, Liao DJ, Liu Y, Feng Z. Identification of a novel human estrogen receptor-α splice variant able to enhance malignant biological behaviors of breast cancer cells. Oncol Lett 2018; 15:5339-5344. [PMID: 29552176 DOI: 10.3892/ol.2018.7970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/08/2016] [Accepted: 01/12/2018] [Indexed: 11/05/2022] Open
Abstract
Since the early 1990s, multiple human estrogen receptor-α (hER-α) splice variants have been identified, of which the majority contain ≥1 deleted exon, and some are expressed as proteins with modified functions from the wild-type 66 kDa hER-α (ER-α66). In the present study, a novel hER-α splice variant, ER-α30, was identified and cloned from clinical breast cancer tissue. The ER-α30 sequence lacked a ligand-binding domain and a ligand-dependent transcriptional activation domain but retained the N-terminal transcriptional activation domain, the DNA-binding domain and a partial hinge domain, and possesses a unique 10-amino-acid domain. The expression of ER-α30 was associated with ER-α66-negative and progesterone receptor-negative breast cancer. The 30 kDa protein was expressed in stably transfected MDA-MB-231 cells, and the overexpression of ER-α30 in MDA-MB-231 cells enhanced malignant biological behaviors, including cellular proliferation, migration and invasion in vitro. The results of the present study indicated that ER-α30 might represent a potential biomarker for breast cancer.
Collapse
Affiliation(s)
- Hua Zhu
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China.,Department of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yue Huang
- Department of Breast Surgery, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541001, P.R. China
| | - Heling Su
- Department of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yili Ma
- Department of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yiming Tao
- Department of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - D Joshua Liao
- Hormel Institute, The University of Minnesota, Austin, MN 55912, USA
| | - Yongming Liu
- Department of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Zhenbo Feng
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| |
Collapse
|
24
|
Parodi DA, Greenfield M, Evans C, Chichura A, Alpaugh A, Williams J, Cyrus KC, Martin MB. Alteration of Mammary Gland Development and Gene Expression by In Utero Exposure to Cadmium. Int J Mol Sci 2017; 18:E1939. [PMID: 28891935 PMCID: PMC5618588 DOI: 10.3390/ijms18091939] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 09/01/2017] [Accepted: 09/05/2017] [Indexed: 01/31/2023] Open
Abstract
Environmental exposure to estrogens and estrogen like contaminants during early development is thought to contribute to the risk of developing breast cancer primarily due to an early onset of puberty; however, exposure during key developing windows may also influence the risk of developing the disease. The goal of this study was to ask whether in utero exposure to the metalloestrogen cadmium alters mammary gland development due to acceleration of puberty onset or to an effect on early development of the mammary gland. The results show that, in addition to advancing the onset of puberty, in utero exposure to the metalloestrogen cadmium altered mammary gland development prior to its effect on puberty onset. In utero exposure resulted in an expansion of the number of mammosphere-forming cells in the neonatal mammary gland and an increase in branching, epithelial cells, and density in the prepubertal mammary gland. In the postpubertal mammary gland, there was a further expansion of the mammary stem/progenitor cell population and overexpression of estrogen receptor-alpha (ERα) that was due to the overexpression and altered regulation of the ERα transcripts derived from exons O and OT in response to estradiol. These results suggest that in utero exposure to cadmium increases stem/progenitor cells, cell density, and expression of estrogen receptor-alpha that may contribute to the risk of developing breast cancer.
Collapse
Affiliation(s)
- Daniela A Parodi
- Departments of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, DC 20007, USA.
| | - Morgan Greenfield
- Department of Oncology, Georgetown University, Washington, DC 20007, USA.
| | - Claire Evans
- Departments of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, DC 20007, USA.
| | - Anna Chichura
- Department of Oncology, Georgetown University, Washington, DC 20007, USA.
| | - Alexandra Alpaugh
- Department of Oncology, Georgetown University, Washington, DC 20007, USA.
| | - James Williams
- Department of Oncology, Georgetown University, Washington, DC 20007, USA.
| | - Kedra C Cyrus
- Department of Oncology, Georgetown University, Washington, DC 20007, USA.
| | - Mary Beth Martin
- Departments of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, DC 20007, USA.
- Department of Oncology, Georgetown University, Washington, DC 20007, USA.
- Lombardi Comprehensive Cancer Center, Research Building, 3970 Reservoir Road NW, Washington, DC 20007, USA.
| |
Collapse
|
25
|
Kim SC, Boese AC, Moore MH, Cleland RM, Chang L, Delafontaine P, Yin KJ, Lee JP, Hamblin MH. Rapid estrogen receptor-α signaling mediated by ERK activation regulates vascular tone in male and ovary-intact female mice. Am J Physiol Heart Circ Physiol 2017; 314:H330-H342. [PMID: 28887333 DOI: 10.1152/ajpheart.00841.2016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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] [Indexed: 01/02/2023]
Abstract
Estrogen has been shown to affect vascular reactivity. Here, we assessed the estrogen receptor-α (ERα) dependency of estrogenic effects on vasorelaxation via a rapid nongenomic pathway in both male and ovary-intact female mice. We compared the effect of a primary estrogen, 17β-estradiol (E2) or 4,4',4″-(4-propyl-[1H]pyrazole-1,3,5-triyl)tris-phenol (PPT; selective ERα agonist). We found that E2 and PPT induced greater aortic relaxation in female mice than in male mice, indicating ERα mediation, which was further validated by using ERα antagonism. Treatment with 1,3-bis(4-hydroxyphenyl)-4-methyl-5-[4-(2-piperidinylethoxy)phenol]-1H-pyrazole dihydrochloride (MPP dihydrochloride; ERα antagonist) attenuated PPT-mediated vessel relaxation in both sexes. ERα-mediated vessel relaxation was further validated by the absence of significant PPT-mediated relaxation in aortas isolated from ERα knockout mice. Treatment with a specific ERK inhibitor, PD-98059, reduced E2-induced vessel relaxation in both sexes but to a lesser extent in female mice. Furthermore, PD-98059 prevented PPT-induced vessel relaxation in both sexes. Both E2 and PPT treatment activated ERK as early as 5-10 min, which was attenuated by PD-98059 in aortic tissue, cultured primary vascular smooth muscle cells (VSMCs), and endothelial cells (ECs). Aortic rings denuded of endothelium showed no differences in vessel relaxation after E2 or PPT treatment, implicating a role of ECs in the observed sex differences. Here, our results are unique to show estrogen-stimulated rapid ERα signaling mediated by ERK activation in aortic tissue, as well as VSMCs and ECs in vitro, in regulating vascular function by using side-by-side comparisons in male and ovary-intact female mice in response to E2 or PPT. NEW & NOTEWORTHY Here, we assessed the estrogen receptor-α dependency of estrogenic effects in vasorelaxation of both male and ovary-intact female mice by performing side-by-side comparisons. Also, we describe the connection between estrogen-stimulated rapid estrogen receptor-α signaling and downstream ERK activation in regulating vascular function in male and ovary-intact female mice.
Collapse
Affiliation(s)
- Seong Chul Kim
- Department of Pharmacology, Tulane University School of Medicine , New Orleans, Louisiana
| | - Austin C Boese
- Department of Pharmacology, Tulane University School of Medicine , New Orleans, Louisiana
| | - Matthew H Moore
- Department of Pharmacology, Tulane University School of Medicine , New Orleans, Louisiana
| | - Rea M Cleland
- Department of Pharmacology, Tulane University School of Medicine , New Orleans, Louisiana
| | - Lin Chang
- Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center , Ann Arbor, Michigan
| | - Patrice Delafontaine
- Heart and Vascular Institute, Tulane University School of Medicine , New Orleans, Louisiana
| | - Ke-Jie Yin
- Pittsburgh Institute of Brain Disorders and Recovery, Department of Neurology, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania
| | - Jean-Pyo Lee
- Department of Physiology, Tulane University School of Medicine , New Orleans, Louisiana.,Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine , New Orleans, Louisiana
| | - Milton H Hamblin
- Department of Pharmacology, Tulane University School of Medicine , New Orleans, Louisiana
| |
Collapse
|
26
|
Abstract
Background Infantile hemangiomas (IHs) are the most common benign vascular tumor of infancy. They occur more frequently in female infants. The cause of hemangioma is currently unknown; however, current studies suggested the importance of estrogen (E2) signaling in hemangioma proliferation. Methods Hemangioma-derived stem cells (HemSCs) were cultured with estrogen for 48–72 h; the cell viability and proliferation were evaluated with the messenger RNA (mRNA) and protein expression levels of fibroblast growth factor 2 (FGF2), vascular endothelial growth factor-A (VEGF-A) and estrogen receptor-α (ER-α), by application of several in vitro assays, such as methyl thiazolyl tetrazolium (MTT), reverse transcriptase–polymerase chain reaction (RT-PCR), real-time PCR, enzyme-linked immunosorbent assay (ELISA) and Western blotting. Also, the cell population’s response to external estrogen was investigated by in vivo experiments. HemSCs and human umbilical vein endothelial cells (HUVECs) were mixed and injected subcutaneously into 20 flank of BALB/c-nu mice, which were randomly divided into 5 groups based on different E2 treatment doses (0, 0.01, 0.1 and 1 mg, respectively), 0.1 mg dimethyl sulfoxide (DMSO) as control. Each group of mice were treated intramuscularly every week, then 2 and 4 weeks later, the subcutaneous implants were harvested and evaluated the tumor tissues with microvessel density (MVD) assay and immunohistochemistry. Results The study demonstrated that application of E2 increased the expression of FGF2, VEGF-A, and ER-α in HemSCs with the optimal concentration from 10−9 to 10−5 M. Two-week treatment of E2 promoted expression of VEGF-A and FGF2 in HemSCs culture. Morphological, histological and immunohistological improvements were observed in vivo using murine IH model in which HemSCs and HUVECs were implanted into BALB/c-nu mice that were post-injected with E2. In the grafts, mean MVD was markedly increased. Conclusion The results suggested that E2 promotes angiogenesis via combination with ER-α to up-regulate the expression of VEGF-A in HemSCs, promoting proliferation of IHs. These findings provide critical insight into the potential mechanisms of E2 action on IHs.
Collapse
Affiliation(s)
- Ling Zhang
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Center for Specialty Strategy Research of Shanghai Jiao Tong University China Hospital Development Institute
| | - Hai Wei Wu
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Center for Specialty Strategy Research of Shanghai Jiao Tong University China Hospital Development Institute
| | - Weien Yuan
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Jia Wei Zheng
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Center for Specialty Strategy Research of Shanghai Jiao Tong University China Hospital Development Institute
| |
Collapse
|
27
|
Nishimura Y, Mabuchi K, Takano A, Hara Y, Negishi H, Morimoto K, Ueno T, Uchiyama S, Takamata A. S-equol Exerts Estradiol-Like Anorectic Action with Minimal Stimulation of Estrogen Receptor-α in Ovariectomized Rats. Front Endocrinol (Lausanne) 2017; 8:281. [PMID: 29097993 PMCID: PMC5653693 DOI: 10.3389/fendo.2017.00281] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 10/06/2017] [Indexed: 11/13/2022] Open
Abstract
Chronic estrogen replacement in ovariectomized rats attenuates food intake and enhances c-Fos expression in the suprachiasmatic nucleus (SCN), specifically during the light phase. S-equol, a metabolite of daidzein, has a strong affinity for estrogen receptor (ER)-β and exerts estrogenic activity. The purpose of the present study was to elucidate whether S-equol exerts an estrogen-like anorectic effect by modifying the regulation of the circadian feeding rhythm in ovariectomized rats. Ovariectomized female Wistar rats were divided into an estradiol (E2)-replaced group and cholesterol (vehicle; Veh)-treated group. These animals were fed either a standard diet or an S-equol-containing diet for 13 days. Then, the brain, uterus, and pituitary gland were collected along with blood samples. In the rats fed the standard diet, E2 replacement attenuated food intake (P < 0.001) and enhanced c-Fos expression in the SCN (P < 0.01) during the light phase. Dietary S-equol supplementation reduced food intake (P < 0.01) and increased c-Fos expression in the SCN (P < 0.01) in the Veh-treated rats but not in the E2-replaced rats during the light phase. Dietary S-equol did not alter ER-α expression in the medial preoptic area or the arcuate nucleus, nor did dietary S-equol affect pituitary gland weight or endometrial epithelial layer thickness. By contrast, E2 replacement not only markedly decreased ER-α expression in these brain areas (P < 0.001) but also increased both the pituitary gland weight (P < 0.001) and the endometrial epithelial layer thickness (P < 0.001). Thus, dietary S-equol acts as an anorectic by modifying the diurnal feeding pattern in a manner similar to E2 in ovariectomized rats; however, the mechanism of action is not likely to be mediated by ER-α. The data suggest a possibility that dietary S-equol could be an alternative to hormone replacement therapy for the prevention of hyperphagia and obesity with a lower risk of adverse effects induced by ER-α stimulation.
Collapse
Affiliation(s)
- Yuri Nishimura
- Department of Environmental Health, Nara Women’s University, Nara, Japan
| | - Kaori Mabuchi
- Department of Environmental Health, Nara Women’s University, Nara, Japan
| | - Azusa Takano
- Department of Environmental Health, Nara Women’s University, Nara, Japan
| | - Yayoi Hara
- Department of Environmental Health, Nara Women’s University, Nara, Japan
| | - Hiroko Negishi
- Department of Environmental Health, Nara Women’s University, Nara, Japan
| | - Keiko Morimoto
- Department of Environmental Health, Nara Women’s University, Nara, Japan
| | - Tomomi Ueno
- Saga Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd., Saga, Japan
| | - Shigeto Uchiyama
- Saga Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd., Saga, Japan
| | - Akira Takamata
- Department of Environmental Health, Nara Women’s University, Nara, Japan
- *Correspondence: Akira Takamata,
| |
Collapse
|
28
|
Nwachukwu JC, Srinivasan S, Bruno NE, Nowak J, Wright NJ, Minutolo F, Rangarajan ES, Izard T, Yao XQ, Grant BJ, Kojetin DJ, Elemento O, Katzenellenbogen JA, Nettles KW. Systems Structural Biology Analysis of Ligand Effects on ERα Predicts Cellular Response to Environmental Estrogens and Anti-hormone Therapies. Cell Chem Biol 2017; 24:35-45. [PMID: 28042045 DOI: 10.1016/j.chembiol.2016.11.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 10/19/2016] [Accepted: 10/21/2016] [Indexed: 12/26/2022]
Abstract
Environmental estrogens and anti-hormone therapies for breast cancer have diverse tissue- and signaling-pathway-selective outcomes, but how estrogen receptor alpha (ERα) mediates this phenotypic diversity is poorly understood. We implemented a statistical approach to allow unbiased, parallel analyses of multiple crystal structures, and identified subtle perturbations of ERα structure by different synthetic and environmental estrogens. Many of these perturbations were in the sub-Å range, within the noise of the individual structures, but contributed significantly to the activities of synthetic and environmental estrogens. Combining structural perturbation data from many structures with quantitative cellular activity profiles of the ligands enabled identification of structural rules for ligand-specific allosteric signaling-predicting activity from structure. This approach provides a framework for understanding the diverse effects of environmental estrogens and for guiding iterative medicinal chemistry efforts to generate improved breast cancer therapies, an approach that can be applied to understanding other ligand-regulated allosteric signaling pathways.
Collapse
|
29
|
Chin YT, Yang SH, Chang TC, Changou CA, Lai HY, Fu E, HuangFu WC, Davis PJ, Lin HY, Liu LF. Mechanisms of dihydrotestosterone action on resveratrol-induced anti-proliferation in breast cancer cells with different ERα status. Oncotarget 2015; 6:35866-79. [PMID: 26456774 DOI: 10.18632/oncotarget.5482] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 05/28/2015] [Accepted: 09/25/2015] [Indexed: 01/08/2023] Open
Abstract
Dihydrotestosterone (DHT) has been shown to promote breast cancer growth via different mechanisms. In addition to binding to ERα, the DHT membrane receptor exists on integrin αvβ3. Resveratrol induces p53-dependent apoptosis via plasma membrane integrin αvβ3. Resveratrol and DHT signals are both transduced by activated ERK1/2; however, DHT promotes cell proliferation in cancer cells, whereas resveratrol is pro-apoptotic. In this study, we examined the mechanism by which DHT inhibits resveratrol-induced apoptosis in human ERα positive (MCF-7) and negative (MDA-MB-231) breast cancer cells. DHT inhibited resveratrol-stimulated phosphorylation of Ser-15 of p53 in a concentration-dependent manner. These effects of DHT on resveratrol action were blocked by an ERα antagonist, ICI 182,780, in MCF-7 breast cancer cells. DHT inhibited resveratrol-induced nuclear complex of p53-COX-2 formation which is required p53-dependent apoptosis. ChIP studies of COX-2/p53 binding to DNA and expression of p53-responsive genes indicated that DHT inhibited resveratrol-induced p53-directed transcriptional activity. In addition, DHT did inhibit resveratrol-induced COX-2/p53-dependent gene expression. These results suggest that DHT inhibits p53-dependent apoptosis in breast cancer cells by interfering with nuclear COX-2 accumulation which is essential for stimulation of apoptotic pathways. Thus, the surface receptor sites for resveratrol and DHT are discrete and activate ERK1/2-dependent downstream effects on apoptosis that are distinctive. These studies provide new insights into the antagonizing effects of resveratrol versus DHT, an important step toward better understanding and eventually treating breast cancer. It also indicates the complex pathways by which apoptosis is induced by resveratrol in DHT-depleted and -repleted environments.
Collapse
|
30
|
Ren L, Mendoza A, Zhu J, Briggs JW, Halsey C, Hong ES, Burkett SS, Morrow J, Lizardo MM, Osborne T, Li SQ, Luu HH, Meltzer P, Khanna C. Characterization of the metastatic phenotype of a panel of established osteosarcoma cells. Oncotarget 2016; 6:29469-81. [PMID: 26320182 PMCID: PMC4745740 DOI: 10.18632/oncotarget.5177] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [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: 05/28/2015] [Accepted: 09/25/2015] [Indexed: 11/25/2022] Open
Abstract
Osteosarcoma (OS) is the most common bone tumor in pediatric patients. Metastasis is a major cause of mortality and morbidity. The rarity of this disease coupled with the challenges of drug development for metastatic cancers have slowed the delivery of improvements in long-term outcomes for these patients. In this study, we collected 18 OS cell lines, confirmed their expression of bone markers and complex karyotypes, and characterized their in vivo tumorgenicity and metastatic potential. Since prior reports included conflicting descriptions of the metastatic and in vivo phenotypes of these models, there was a need for a comparative assessment of metastatic phenotypes using identical procedures in the hands of a single investigative group. We expect that this single characterization will accelerate the study of this metastatic cancer. Using these models we evaluated the expression of six previously reported metastasis-related OS genes. Ezrin was the only gene consistently differentially expressed in all the pairs of high/low metatstatic OS cells. We then used a subtractive gene expression approach of the high and low human metastatic cells to identify novel genes that may be involved in OS metastasis. PHLDA1 (pleckstrin homology-like domain, family A) was identified as one of the genes more highly expressed in the high metastatic compared to low metastatic cells. Knocking down PHLDA1 with siRNA or shRNA resulted in down regulation of the activities of MAPKs (ERK1/2), c-Jun N-terminal kinases (JNK), and p38 mitogen-activated protein kinases (MAPKs). Reducing the expression of PHLDA1 also delayed OS metastasis progression in mouse xenograft models.
Collapse
Affiliation(s)
- Ling Ren
- Molecular Oncology Section - Metastasis Biology Group, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Arnulfo Mendoza
- Molecular Oncology Section - Metastasis Biology Group, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Jack Zhu
- Genetic Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Joseph W Briggs
- Molecular Oncology Section - Metastasis Biology Group, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Charles Halsey
- Molecular Pathology Unit, Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, Maryland, USA
| | - Ellen S Hong
- Molecular Oncology Section - Metastasis Biology Group, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Sandra S Burkett
- Comparative Molecular Cytogenetics Core Facility, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - James Morrow
- School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Michael M Lizardo
- Molecular Oncology Section - Metastasis Biology Group, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Tanasa Osborne
- National Institute of Environmental Health, Research Triangle Park, North Carolina, USA
| | - Samuel Q Li
- School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Hue H Luu
- Department of Orthopedic Surgery & Rehabilitation Medicine, University of Chicago, Medicine & Biological Sciences, Chicago, USA
| | - Paul Meltzer
- Genetic Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Chand Khanna
- Molecular Oncology Section - Metastasis Biology Group, Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland, USA
| |
Collapse
|
31
|
Fiocchetti M, Cipolletti M, Leone S, Ascenzi P, Marino M. Neuroglobin overexpression induced by the 17β-Estradiol- Estrogen receptor-α Pathway reduces the sensitivity of MCF-7 Breast cancer cell to paclitaxel. IUBMB Life 2016; 68:645-51. [PMID: 27312786 DOI: 10.1002/iub.1522] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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: 04/27/2016] [Accepted: 05/27/2016] [Indexed: 11/11/2022]
Abstract
Although paclitaxel (Taxol) is an active chemotherapeutic agent for the treatment of breast cancer, not all breast tumors are sensitive to this drug. In particular, there is a wide agreement on the low sensitivity of estrogen receptor (ER) α-positive breast cancer to paclitaxel treatment. However, the ERα-based insensitivity to paclitaxel is still elusive. Here, the effect of the E2/ERα-dependent upregulation of neuroglobin (NGB), an antiapoptotic globin, on the reduced sensitivity of breast cancer cells to paclitaxel-induced apoptosis has been evaluated in ERα-containing MCF-7 cells. The E2 pretreatment enhances the ERα activity and significantly impairs paclitaxel-induced apoptosis as evaluated by Annexin V assay and PARP-1 cleavage. NGB displays a pivotal role in the E2/ERα-induced antiapoptotic pathway to abrogate paclitaxel-induced cell death in stable NGB-silenced MCF-7 cell clones. Moreover, in the absence of the active ERα, paclitaxel significantly reduces the NGB cell content. In conclusion, these results highlight the involvement of ERα activation and of E2/ERα-dependent NGB upregulation in the insensitivity of MCF-7 to paclitaxel. These novel findings could have important implications in the development of targeted therapeutics for overcoming paclitaxel insensitivity in ERα-positive human breast cancer. © 2016 IUBMB Life, 68(8):645-651, 2016.
Collapse
Affiliation(s)
| | | | - Stefano Leone
- Department of Science, Roma Tre University, Roma, Italy
| | - Paolo Ascenzi
- Department of Science, Roma Tre University, Roma, Italy.,Interdepartmental Laboratory of Electron Microscopy, Roma Tre University, Roma, Italy
| | - Maria Marino
- Department of Science, Roma Tre University, Roma, Italy
| |
Collapse
|
32
|
Clarke R, Cook KL. Unfolding the Role of Stress Response Signaling in Endocrine Resistant Breast Cancers. Front Oncol 2015; 5:140. [PMID: 26157705 PMCID: PMC4475795 DOI: 10.3389/fonc.2015.00140] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 06/03/2015] [Indexed: 11/24/2022] Open
Abstract
The unfolded protein response (UPR) is an ancient stress response that enables a cell to manage the energetic stress that accompanies protein folding. There has been a significant recent increase in our understanding of the UPR, how it integrates physiological processes within cells, and how this integration can affect cancer cells and cell fate decisions. Recent publications have highlighted the role of UPR signaling components on mediating various cell survival pathways, cellular metabolism and bioenergenics, and autophagy. We address the role of UPR on mediating endocrine therapy resistance and estrogen receptor-positive breast cancer cell survival.
Collapse
Affiliation(s)
- Robert Clarke
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center , Washington, DC , USA
| | - Katherine L Cook
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center , Washington, DC , USA
| |
Collapse
|
33
|
Abstract
BACKGROUND The hypothalamus plays a key role in mediating the effects of estrogen on many physiological functions, including reproduction, metabolism, and thermoregulation. We have previously observed marked estrogen-dependent gene expression changes within the hypothalamus of rhesus macaques during aging, especially in the KNDy neurons of the arcuate-median eminence (ARC-ME) that produce kisspeptin, neurokinin B, and dynorphin A. Little is known, however, about the mechanisms involved in mediating the feedback from estrogen onto these neurons. METHODS We used quantitative real-time PCR to profile age- and estrogen-dependent gene expression changes in the rhesus macaque hypothalamus. Our focus was on genes that encode steroid receptors (ESR1, ESR2, PGR, and AR) and on enzymes that contribute to the local synthesis of 17β-estradiol (E2; STS, HSD3B1/2, HSD17B5, and CYP19A). In addition, we used RT(2) Profiler™ PCR Arrays to profile a larger set of genes that are integral to hypothalamic function. RESULTS KISS1, KISS1R, TAC3, and NPY2R mRNA levels increased in surgically menopausal (ovariectomized) old females relative to age-matched ovariectomized animals that received E2 hormone therapy. In contrast, PGR, HSD17B, GNRH2, SLC6A3, KISS1, TAC3, and NPY2R mRNA levels increased after E2 supplementation. CONCLUSION The rhesus macaque ARC-ME expresses many genes that are responsive to changes in circulating estrogen levels, even during old age, and these may contribute to causing the normal and pathophysiological changes that occur during menopause.
Collapse
Affiliation(s)
- Dominique H. Eghlidi
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, Oreg., USA
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, Oreg., USA
| | - Henryk F. Urbanski
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, Oreg., USA
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, Oreg., USA
- Deptartment of Physiology and Pharmacology, Oregon Health and Science University, Portland, Oreg., USA
| |
Collapse
|
34
|
Liu Z, Wang J, Wang H, Wang D, Hu L, Liu Q, Sun X. Hormonal receptors and vascular endothelial growth factor in juvenile nasopharyngeal angiofibroma: immunohistochemical and tissue microarray analysis. Acta Otolaryngol 2015; 135:51-7. [PMID: 25384380 DOI: 10.3109/00016489.2014.952774] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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] [Indexed: 11/13/2022]
Abstract
CONCLUSION This work demonstrated that juvenile nasopharyngeal angiofibromas (JNAs) express high levels of hormone receptors and vascular endothelial growth factor (VEGF) compared with normal nasal mucosa. The interaction between hormone receptors and VEGF may be involved in the initiation and growth of JNA. OBJECTIVES JNA is a rare benign tumor that occurs almost exclusively in male adolescents. Although generally regarded as a hormone-dependent tumor, this has not been proven in previous studies. The aim of this study was to investigate the role of hormone receptors in JNA and the relationship with clinical characteristics. METHODS Standard immunohistochemical microarray analysis was performed on 70 JNA samples and 10 turbinate tissue samples. Specific antibodies for androgen receptor (AR), estrogen receptor-α (ER-α), estrogen receptor-β (ER-β), progesterone receptor (PR), and VEGF were examined, and the relationships of receptor expression with age, tumor stage, and bleeding were evaluated. RESULTS RESULTS showed that JNA expressed ER-α (92.9%), ER-β (91.4%), AR (65.7%), PR (12.8%), and VEGF (95.7%) at different levels. High level of VEGF was linked to elevated ER-α and ER-β. There was no significant relationship between hormonal receptors and age at diagnosis, tumor stage or bleeding. However, overexpression of ER-α was found to be an indicator of poor prognosis (p = 0.031).
Collapse
Affiliation(s)
- Zhuofu Liu
- Department of ENT, Eye, Ear, Nose, and Throat Hospital of Fudan University , Shanghai , China
| | | | | | | | | | | | | |
Collapse
|
35
|
Xue B, Zhang Z, Beltz TG, Guo F, Hay M, Johnson AK. Genetic knockdown of estrogen receptor-alpha in the subfornical organ augments ANG II-induced hypertension in female mice. Am J Physiol Regul Integr Comp Physiol 2014; 308:R507-16. [PMID: 25552661 DOI: 10.1152/ajpregu.00406.2014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The present study tested the hypotheses that 1) ERα in the brain plays a key role in the estrogen-protective effects against ANG II-induced hypertension, and 2) that the subfornical organ (SFO) is a key site where ERα mediates these protective actions. In this study, a "floxed" ERα transgenic mouse line (ERα(flox)) was used to create models in which ERα was knocked down in the brain or just in the SFO. Female mice with ERα ablated in the nervous system (Nestin-ERα(-) mice) showed greater increases in blood pressure (BP) in response to ANG II. Furthermore, females with ERα knockdown specifically in the SFO [SFO adenovirus-Cre (Ad-Cre) injected ERα(flox) mice] also showed an enhanced pressor response to ANG II. Immunohistochemical (IHC), RT-PCR, and Western blot analyses revealed a marked reduction in the expression of ERα in nervous tissues and, in particular, in the SFO. These changes were not present in peripheral tissues in Nestin-ERα(-) mice or Ad-Cre-injected ERα(flox) mice. mRNA expression of components of the renin-angiotensin system in the lamina terminalis were upregulated in Nestin-ERα(-) mice. Moreover, ganglionic blockade on day 7 after ANG II infusions resulted in a greater reduction of BP in Nestin-ERα(-) mice or SFO Ad-Cre-injected mice, suggesting that knockdown of ERα in the nervous system or the SFO alone augments central ANG II-induced increase in sympathetic tone. The results indicate that interfering with the action of estrogen on SFO ERα is sufficient to abolish the protective effects of estrogen against ANG II-induced hypertension.
Collapse
Affiliation(s)
- Baojian Xue
- Departments of Psychology, University of Iowa, Iowa City, Iowa; and
| | - Zhongming Zhang
- Zhang Zhongjing College of Chinese Medicine, Nanyang Institute of Technology, Henan, China
| | - Terry G Beltz
- Departments of Psychology, University of Iowa, Iowa City, Iowa; and
| | - Fang Guo
- Departments of Psychology, University of Iowa, Iowa City, Iowa; and
| | - Meredith Hay
- Department of Physiology, University of Arizona, Tucson, Arizona; Evelyn F. McKnight Brain Institute, Tucson, Arizona; and
| | - Alan Kim Johnson
- Departments of Psychology, University of Iowa, Iowa City, Iowa; and Department of Pharmacology, University of Iowa, Iowa City, Iowa; François M. Abboud Cardiovascular Research Center, University of Iowa, Iowa City, Iowa
| |
Collapse
|
36
|
Henning P, Ohlsson C, Engdahl C, Farman H, Windahl SH, Carlsten H, Lagerquist MK. The effect of estrogen on bone requires ERα in nonhematopoietic cells but is enhanced by ERα in hematopoietic cells. Am J Physiol Endocrinol Metab 2014; 307:E589-95. [PMID: 25117411 PMCID: PMC4187026 DOI: 10.1152/ajpendo.00255.2014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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] [Indexed: 01/07/2023]
Abstract
The effects of estrogen on bone are mediated mainly via estrogen receptor (ER)α. ERα in osteoclasts (hematopoietic origin) is involved in the trabecular bone-sparing effects of estrogen, but conflicting data are reported on the role of ERα in osteoblast lineage cells (nonhematopoietic origin) for bone metabolism. Because Cre-mediated cell-specific gene inactivation used in previous studies might be confounded by nonspecific and/or incomplete cell-specific ERα deletion, we herein used an alternative approach to determine the relative importance of ERα in hematopoietic (HC) and nonhematopoietic cells (NHC) for bone mass. Chimeric mice with selective inactivation of ERα in HC or NHC were created by bone marrow transplantations of wild-type (WT) and ERα-knockout (ERα(-/-)) mice. Estradiol treatment increased both trabecular and cortical bone mass in ovariectomized WT/WT (defined as recipient/donor) and WT/ERα(-/-) mice but not in ERα(-/-)/WT or ERα(-/-)/ERα(-/-) mice. However, estradiol effects on both bone compartments were reduced (∼50%) in WT/ERα(-/-) mice compared with WT/WT mice. The effects of estradiol on fat mass and B lymphopoiesis required ERα specifically in NHC and HC, respectively. In conclusion, ERα in NHC is required for the effects of estrogen on both trabecular and cortical bone, but these effects are enhanced by ERα in HC.
Collapse
Affiliation(s)
| | | | | | | | | | - Hans Carlsten
- Centre for Bone and Arthritis Research, Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | | |
Collapse
|
37
|
Diwan V, Small D, Kauter K, Gobe GC, Brown L. Gender differences in adenine-induced chronic kidney disease and cardiovascular complications in rats. Am J Physiol Renal Physiol 2014; 307:F1169-78. [PMID: 25209863 DOI: 10.1152/ajprenal.00676.2013] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [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: 12/19/2022] Open
Abstract
Gender contributes to differences in incidence and progression of chronic kidney disease (CKD) and associated cardiovascular disease. To induce kidney damage in male and female Wistar rats (n = 12/group), a 0.25% adenine diet for 16 wk was used. Kidney function (blood urea nitrogen, plasma creatinine, proteinuria) and structure (glomerular damage, tubulointerstitial atrophy, fibrosis, inflammation); cardiovascular function (blood pressure, ventricular stiffness, vascular responses, echocardiography) and structure (cardiac fibrosis); plasma testosterone and estrogen concentrations; and protein expression for oxidative stress [heme oxygenase-1, inflammation (TNF-α), fibrosis (transforming growth factor-β), ERK1/2, and estrogen receptor-α (ER-α)] were compared in males and females. Adenine-fed females had less decline in kidney function than adenine-fed males, although kidney atrophy, inflammation, and fibrosis were similar. Plasma estrogen concentrations increased and plasma testosterone concentrations decreased in adenine-fed males, with smaller changes in females. CKD-associated molecular changes in kidneys were more pronounced in males than females except for expression of ER-α in the kidney, which was completely suppressed in adenine-fed males but unchanged in adenine-fed females. Both genders showed increased blood pressure, ventricular stiffness, and cardiac fibrosis with the adenine diet. Cardiovascular changes with adenine were similar in males and females, except males developed concentric, and females eccentric cardiac hypertrophy. In hearts from adenine-fed male and female rats, expression of ER-α and activation of the ERK1/2 pathway were increased, in part explaining changes in cardiac hypertrophy. In summary, adenine-induced kidney damage may be increased in males due to the suppression of ER-α.
Collapse
Affiliation(s)
- Vishal Diwan
- School of Biomedical Science, The University of Queensland, Brisbane, Australia; Centre for Kidney Disease Research, School of Medicine, Translational Research Institute, The University of Queensland, Brisbane, Australia; and
| | - David Small
- Centre for Kidney Disease Research, School of Medicine, Translational Research Institute, The University of Queensland, Brisbane, Australia; and
| | - Kate Kauter
- School of Health, Nursing and Midwifery, The University of Southern Queensland, Toowoomba, Australia
| | - Glenda C Gobe
- Centre for Kidney Disease Research, School of Medicine, Translational Research Institute, The University of Queensland, Brisbane, Australia; and
| | - Lindsay Brown
- School of Health, Nursing and Midwifery, The University of Southern Queensland, Toowoomba, Australia
| |
Collapse
|
38
|
Kim D, Lee AS, Jung YJ, Yang KH, Lee S, Park SK, Kim W, Kang KP. Tamoxifen ameliorates renal tubulointerstitial fibrosis by modulation of estrogen receptor α-mediated transforming growth factor-β1/Smad signaling pathway. Nephrol Dial Transplant 2014; 29:2043-53. [PMID: 25031017 DOI: 10.1093/ndt/gfu240] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND After insult to the kidney, a renal fibrotic process is initiated with sustained inflammation, fibroblast activation and accumulation of extracellular matrix (ECM). Tamoxifen has been used as an anti-estrogen for the prevention and treatment of breast cancer. In this study, we investigated the protective effects of tamoxifen on unilateral ureteral obstruction (UUO)-induced renal tubulointerstitial fibrosis and its molecular mechanism. METHODS Renal fibrosis was induced by UUO in 7-week-old C57BL/6 mice. Tamoxifen (50 mg/kg) was given by oral gavage for 5 days before induction of renal fibrosis. Tamoxifen treatment was continued for 14 days after UUO operation. Histologic changes were examined by periodic acid-Schiff stain and Masson's trichrome stain. Expression of α-smooth muscle actin, vimentin, type I collagen, fibronectin and cell adhesion molecules were evaluated by immunohistochemistry and western blot analysis. We also evaluated the effect of tamoxifen on estrogen receptor (ER)-α-mediated transforming growth factor (TGF)-β1/Smad signaling pathway in vitro. RESULTS Renal tubular injury and fibrosis were increased after UUO. Tamoxifen treatment significantly decreased UUO-induced renal tubular injury and fibrosis. Renal fibroblast activation, ECM deposition and inflammation were significantly increased after ureteral ligation. However, tamoxifen treatment significantly decreased UUO-induced renal fibroblast activation, ECM deposition and inflammation by suppression of TGF-β1/Smad signaling pathway in vivo. Tamoxifen decreased TGF-β1-induced fibroblast proliferation and cell migration by modulating ERα-mediated TGF-β1/Smad signaling pathway in vitro. CONCLUSION These findings indicate that tamoxifen has a beneficial effect on UUO-induced tubulointerstitial fibrosis by suppression of renal fibroblast activation via modulation of ERα-mediated renal TGF-β1/Smad signaling pathway.
Collapse
Affiliation(s)
- Dal Kim
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Ae Sin Lee
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Yu Jin Jung
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Kyoung Hee Yang
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Sik Lee
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Sung Kwang Park
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Won Kim
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Kyung Pyo Kang
- Department of Internal Medicine, Research Institute of Clinical Medicine and Diabetes Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| |
Collapse
|
39
|
Choi EJ, Jung JY, Kim GH. Genistein inhibits the proliferation and differentiation of MCF-7 and 3T3-L1 cells via the regulation of ERα expression and induction of apoptosis. Exp Ther Med 2014; 8:454-458. [PMID: 25009600 PMCID: PMC4079435 DOI: 10.3892/etm.2014.1771] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [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: 12/30/2013] [Accepted: 05/06/2014] [Indexed: 11/29/2022] Open
Abstract
The present study investigated the effect of the phytochemical genistein on the proliferation and differentiation of MCF-7 and 3T3-L1 cells via the regulation of estrogen receptor-α (ERα) expression and the induction of apoptosis. When MCF-7 human breast cancer cells were treated with 50, 100, 150 and 200 μM genistein for 24, 48 or 72 h, cell growth was significantly decreased in a concentration-dependent manner. Notably, the patterns of ERα expression and proliferation in MCF-7 cells treated with genistein were similar. Furthermore, ERα expression in differentiating 3T3-L1 cells was significantly inhibited by 48 h treatment with 50 μM genistein, which was selected based on the results of cytotoxicity assays on 3T3-L1 preadipocytes [lactate dehydrogenase (LDH) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) viability assays]. Under the same conditions, genistein-induced apoptotic features were observed in MCF-7 and differentiating 3T3-L1 cells. This observation is supported by the finding that B-cell lymphoma 2 (Bcl-2) expression was reduced while that of Bcl-2-associated X protein (Bax) was induced by genistein. The results of the present study suggest that an ERα-related pathway and the induction of apoptosis are involved in the proliferation of MCF-7 cells and the differentiation of 3T3-L1 cells.
Collapse
Affiliation(s)
- Eun Jeong Choi
- Plant Resources Research Institute, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Jae Yeon Jung
- Plant Resources Research Institute, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Gun-Hee Kim
- Plant Resources Research Institute, Duksung Women's University, Seoul 132-714, Republic of Korea
| |
Collapse
|
40
|
Abstract
The development of insulin resistance in the liver is a key event that drives dyslipidemia and predicts diabetes and cardiovascular risk with obesity. Clinical data show that estrogen signaling in males helps prevent adiposity and insulin resistance, which may be mediated through estrogen receptor-α (ERα). The tissues and pathways that mediate the benefits of estrogen signaling in males with obesity are not well defined. In female mice, ERα signaling in the liver helps to correct pathway-selective insulin resistance with estrogen treatment after ovariectomy. We assessed the importance of liver estrogen signaling in males using liver ERα-knockout (LKO) mice fed a high-fat diet (HFD). We found that the LKO male mice had decreased insulin sensitivity compared with their wild-type floxed (fl/fl) littermates during hyperinsulinemic euglycemic clamps. Insulin failed to suppress endogenous glucose production in LKO mice, indicating liver insulin resistance. Insulin promoted glucose disappearance in LKO and fl/fl mice similarly. In the liver, insulin failed to induce phosphorylation of Akt-Ser(473) and exclude FOXO1 from the nucleus in LKO mice, a pathway important for liver glucose and lipid metabolism. Liver triglycerides and diacylglycerides were also increased in LKO mice, which corresponded with dysregulation of insulin-stimulated ACC phosphorylation and DGAT1/2 protein levels. Our studies demonstrate that estrogen signaling through ERα in the liver helps prevent whole body and hepatic insulin resistance associated with HFD feeding in males. Augmenting hepatic estrogen signaling through ERα may lessen the impact of obesity on diabetes and cardiovascular risk in males.
Collapse
Affiliation(s)
- Lin Zhu
- Division of Diabetes, Endocrinology, and Metabolism, Department of Internal Medicine, and
| | - Melissa N Martinez
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Christopher H Emfinger
- Tennessee Valley Healthcare System, Division of Diabetes, Endocrinology, and Metabolism, Department of Internal Medicine, and
| | - Brian T Palmisano
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - John M Stafford
- Tennessee Valley Healthcare System, Division of Diabetes, Endocrinology, and Metabolism, Department of Internal Medicine, and Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee
| |
Collapse
|
41
|
Khan S, Shukla S, Sinha S, Meeran SM. Role of adipokines and cytokines in obesity-associated breast cancer: therapeutic targets. Cytokine Growth Factor Rev 2013; 24:503-13. [PMID: 24210902 DOI: 10.1016/j.cytogfr.2013.10.001] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 10/10/2013] [Accepted: 10/11/2013] [Indexed: 02/06/2023]
Abstract
Obesity is the cause of a large proportion of breast cancer incidences and mortality in post-menopausal women. In obese people, elevated levels of various growth factors such as insulin and insulin-like growth factors (IGFs) are found. Elevated insulin level leads to increased secretion of estrogen by binding to the circulating sex hormone binding globulin (SHBG). The increased estrogen-mediated downstream signaling favors breast carcinogenesis. Obesity leads to altered expression profiles of various adipokines and cytokines including leptin, adiponectin, IL-6, TNF-α and IL-1β. The increased levels of leptin and decreased adiponectin secretion are directly associated with breast cancer development. Increased levels of pro-inflammatory cytokines within the tumor microenvironment promote tumor development. Efficacy of available breast cancer drugs against obesity-associated breast cancer is yet to be confirmed. In this review, we will discuss different adipokine- and cytokine-mediated molecular signaling pathways involved in obesity-associated breast cancer, available therapeutic strategies and potential therapeutic targets for obesity-associated breast cancer.
Collapse
|
42
|
Kalogera E, Pistos C, Provatopoulou X, Athanaselis S, Spiliopoulou C, Gounaris A. Androgen glucuronides analysis by liquid chromatography tandem-mass spectrometry: could it raise new perspectives in the diagnostic field of hormone-dependent malignancies? J Chromatogr B Analyt Technol Biomed Life Sci 2013; 940:24-34. [PMID: 24140653 DOI: 10.1016/j.jchromb.2013.09.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 08/09/2013] [Accepted: 09/18/2013] [Indexed: 01/14/2023]
Abstract
Breast and prostate constitute organs of intense steroidogenic activity. Clinical and epidemiologic data provide strong evidence on the influence of androgens and estrogens on the risk of typical hormone-dependent malignancies, like breast and prostate cancer. Recent studies have focused on the role of androgen metabolites in regulating androgen concentrations in hormone-sensitive tissues. Steroid glucuronidation has been suggested to have a prominent role in controlling the levels and the biological activity of unconjugated androgens. It is well-established that serum levels of androgen glucuronides reflect androgen metabolism in androgen-sensitive tissues. Quantitative analysis of androgen metabolites in blood specimens is the only minimally invasive approach permitting an accurate estimate of the total pool of androgens. During the past years, androgen glucuronides analysis most often involved radioimmunoassays (RIA) or direct immunoassays, both methods bearing serious limitations. However, recent impressive technical advances in mass spectrometry, and particularly in high performance liquid chromatography coupled with mass spectrometry (LC-MS/MS), have overcome these drawbacks enabling the simultaneous, quantitative analysis of multiple steroids even at low concentrations. Blood androgen profiling by LC-MS/MS, a robust and reliable technique of high selectivity, sensitivity, specificity, precision and accuracy emerges as a promising new approach in the study of human pathology. The present review offers a contemporary insight in androgen glucuronides profiling through the application of LC-MS/MS, highlighting new perspectives in the study of steroids and their implication in hormone-dependent malignancies.
Collapse
|
43
|
Ward JM, Rider V, Abdou NI, Kimler B. Estradiol differentially regulates calreticulin: a potential link with abnormal T cell function in systemic lupus erythematosus? Lupus 2013; 22:583-96. [PMID: 23535532 DOI: 10.1177/0961203313482742] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Systemic lupus erythematosus (SLE) is an autoimmune disease that affects women nine times more often than men. The present study investigates estradiol-dependent control of the calcium-buffering protein, calreticulin, to gain further insight into the molecular basis of abnormal T cell signaling in SLE T cells. METHODS T cells were purified from blood samples obtained from healthy females and SLE patients. Calreticulin expression was quantified by real-time polymerase chain amplification. Calreticulin and estrogen receptor-α were co-precipitated and analyzed by Western blotting to determine if the proteins associate in T cells. RESULTS Calreticulin expression increased (p = 0.034) in activated control T cells, while estradiol decreased (p = 0.044) calreticulin in resting T cells. Calreticulin expression decreased in activated SLE T cell samples and increased in approximately 50% of resting T cell samples. Plasma estradiol was similar (p > 0.05) among SLE patients and control volunteers. Estrogen receptor-α and calreticulin co-precipitated from nuclear and cytoplasmic T cell compartments. CONCLUSIONS The results indicate that estradiol tightly regulates calreticulin expression in normal human T cells, and the dynamics are different between activated and resting T cells. The absence of this tight regulation in SLE T cells could contribute to abnormal T cell function.
Collapse
Affiliation(s)
- J M Ward
- Department of Biology, Pittsburg State University, Pittsburg, Kansas 66762, USA
| | | | | | | |
Collapse
|
44
|
Che J, Zhang FZ, Zhao CQ, Hu XD, Fan SJ. Cyclopamine is a novel Hedgehog signaling inhibitor with significant anti-proliferative, anti-invasive and anti-estrogenic potency in human breast cancer cells. Oncol Lett 2013; 5:1417-1421. [PMID: 23599805 PMCID: PMC3629107 DOI: 10.3892/ol.2013.1195] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [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: 11/26/2012] [Accepted: 02/04/2013] [Indexed: 01/22/2023] Open
Abstract
Stimulation of Hedgehog (Hh) signaling induces carcinogenesis or promotes cell survival in cancers of multiple organs. In epithelial cancer with aberrant Hedgehog activation, abrogation of Hedgehog signaling by cyclopamine, a naturally occurring Hedgehog-specific small-molecule inhibitor, causes profound inhibition of tumor growth. In the present study, cyclopamine displayed a significant potency in suppressing the proliferation of both estrogen-responsive (MCF-7) and estrogen-independent (MDA-MB-231) human breast cancer cells. Cyclopamine induced a robust G1 cell cycle arrest and elicited notable effects on the expression of cyclin D1 through modulation of the MAPK/ERK signaling pathway. Cyclopamine also inhibited the invasive ability of both breast cancer cell lines by suppressing the expression levels of NF-κB, MMP2 and MMP9 protein. Furthermore, in estrogen-responsive MCF-7 cells, cyclopamine significantly downregulated the production of estrogen receptor-α protein. Our results implicate cyclopamine as a novel, potent inhibitor of human breast cancer proliferation and estrogen responsiveness that could potentially be developed into a promising therapeutic agent for the treatment of breast cancer.
Collapse
Affiliation(s)
- Jun Che
- Key Laboratory of Radiation Biology, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, Jiangsu 215123; ; Department of Radiation Oncology, The Fourth Hospital Affiliated to Soochow University, Wuxi, Jiangsu 214062, P.R. China
| | | | | | | | | |
Collapse
|
45
|
He YJ, Wu JZ, Ji MH, Ma T, Qiao EQ, Ma R, Tang JH. miR-342 is associated with estrogen receptor-α expression and response to tamoxifen in breast cancer. Exp Ther Med 2013; 5:813-818. [PMID: 23408138 PMCID: PMC3570195 DOI: 10.3892/etm.2013.915] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [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: 11/26/2012] [Accepted: 01/10/2013] [Indexed: 12/15/2022] Open
Abstract
Estrogen receptor-α (ERα) is essential for estrogen-dependent growth and its level of expression is a crucial determinant of response to endocrine therapy and prognosis in ERα-positive breast cancer. Breast cancer patients show a wide range of ERα expression levels which change in individual patients during disease progression and in response to systemic therapies. However, little is known concerning how the expression of ERα is regulated in human breast cancer. Recently, several microRNAs (miRNAs) have been identified to regulate ERα expression and to predict ER, progesterone receptor (PR) and human epidermal growth factor 2 (HER2) status. The expression levels of miR-342 and ERα mRNA were analyzed in human breast cancer samples and cell lines by quantitative reverse transcription (RT)-PCR analysis. The correlations between the expression levels of miR-342 and clinicopathological factors were analyzed. Statistically significant associations were observed between miR-342 and ER, HER2 and vascular endothelial growth factor (VEGF) status in the human breast cancer samples and the levels of miR-342 gradually increased as ERα mRNA expression increased. Moreover, ectopic overexpression of miR-342 upregulated the expression levels of the ERα mRNA and significantly sensitized the MCF-7 cells to tamoxifen-induced apoptosis and inhibition of cellular proliferation. These results suggested that miR-342 expression is positively correlated with ERα mRNA expression in human breast cancer and that it may be a significant marker for predicting tamoxifen sensitivity in ERα-positive breast cancer and a potential target for restoring ERα expression and responding to antiestrogen therapy.
Collapse
Affiliation(s)
- Yue-Jun He
- Surgery Department, The Second Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221000; ; Breast Surgery, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210000, P.R. China
| | | | | | | | | | | | | |
Collapse
|
46
|
Börjesson AE, Windahl SH, Karimian E, Eriksson EE, Lagerquist MK, Engdahl C, Antal MC, Krust A, Chambon P, Sävendahl L, Ohlsson C. The role of estrogen receptor-α and its activation function-1 for growth plate closure in female mice. Am J Physiol Endocrinol Metab 2012; 302:E1381-9. [PMID: 22414805 PMCID: PMC3378067 DOI: 10.1152/ajpendo.00646.2011] [Citation(s) in RCA: 35] [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] [Indexed: 11/22/2022]
Abstract
High estradiol levels in late puberty induce growth plate closure and thereby cessation of growth in humans. In mice, the growth plates do not fuse after sexual maturation, but old mice display reduced longitudinal bone growth and high-dose estradiol treatment induces growth plate closure. Estrogen receptor (ER)-α stimulates gene transcription via two activation functions (AFs), AF-1 and AF-2. To evaluate the role of ERα and its AF-1 for age-dependent reduction in longitudinal bone growth and growth plate closure, female mice with inactivation of ERα (ERα(-/-)) or ERαAF-1 (ERαAF-1(0)) were evaluated. Old (16- to 19-mo-old) female ERα(-/-) mice showed continued substantial longitudinal bone growth, resulting in longer bones (tibia: +8.3%, P < 0.01) associated with increased growth plate height (+18%, P < 0.05) compared with wild-type (WT) mice. In contrast, the longitudinal bone growth ceased in old ERαAF-1(0) mice (tibia: -4.9%, P < 0.01). Importantly, the proximal tibial growth plates were closed in all old ERαAF-1(0) mice while they were open in all WT mice. Growth plate closure was associated with a significantly altered balance between chondrocyte proliferation and apoptosis in the growth plate. In conclusion, old female ERα(-/-) mice display a prolonged and enhanced longitudinal bone growth associated with increased growth plate height, resembling the growth phenotype of patients with inactivating mutations in ERα or aromatase. In contrast, ERαAF-1 deletion results in a hyperactive ERα, altering the chondrocyte proliferation/apoptosis balance, leading to growth plate closure. This suggests that growth plate closure is induced by functions of ERα that do not require AF-1 and that ERαAF-1 opposes growth plate closure.
Collapse
Affiliation(s)
- A. E. Börjesson
- 1Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden;
| | - S. H. Windahl
- 1Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden;
| | - E. Karimian
- 2Division of Pediatric Endocrinology Unit, Department of Woman's and Children's Health, Karolinska Institutet, Stockholm, Sweden; and
| | - E. E. Eriksson
- 2Division of Pediatric Endocrinology Unit, Department of Woman's and Children's Health, Karolinska Institutet, Stockholm, Sweden; and
| | - M. K. Lagerquist
- 1Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden;
| | - C. Engdahl
- 1Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden;
| | - M. C. Antal
- 3Departement of Functional Genomics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale/UdS, Collège de France, Illkirch, Cedex, France
| | - A. Krust
- 3Departement of Functional Genomics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale/UdS, Collège de France, Illkirch, Cedex, France
| | - P. Chambon
- 3Departement of Functional Genomics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale/UdS, Collège de France, Illkirch, Cedex, France
| | - L. Sävendahl
- 2Division of Pediatric Endocrinology Unit, Department of Woman's and Children's Health, Karolinska Institutet, Stockholm, Sweden; and
| | - C. Ohlsson
- 1Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden;
| |
Collapse
|
47
|
Abstract
Breast cancer is the most frequent malignancy and second leading cause of cancer-related deaths among women. Despite advances in genetic and biochemical analyses, the incidence of breast cancer and its associated mortality remain very high. About 60 – 70% of breast cancers are Estrogen Receptor alpha (ER-α) positive and are dependent on estrogen for growth. Selective estrogen receptor modulators (SERMs) have therefore provided an effective targeted therapy to treat ER-α positive breast cancer patients. Unfortunately, development of resistance to endocrine therapy is frequent and leads to cancer recurrence. Our understanding of molecular mechanisms involved in the development of ER-α positive tumors and their resistance to ER antagonists is currently limited due to lack of experimental models of ER-α positive breast cancer. In most mouse models of breast cancer, the tumors that form are typically ER-negative and independent of estrogen for their growth. However, in recent years more attention has been given to develop mouse models that develop different subtypes of breast cancers, including ER-positive tumors. In this review, we discuss the currently available mouse models that develop ER-α positive mammary tumors and their potential use to elucidate the molecular mechanisms of ER-α positive breast cancer development and endocrine resistance.
Collapse
Affiliation(s)
- Shakur Mohibi
- Department of Genetics, Cell Biology, and Anatomy, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | | | | | | |
Collapse
|
48
|
Sheng ZG, Zhu BZ. Low concentrations of bisphenol A induce mouse spermatogonial cell proliferation by G protein-coupled receptor 30 and estrogen receptor-α. Environ Health Perspect 2011; 119:1775-80. [PMID: 21813366 PMCID: PMC3261991 DOI: 10.1289/ehp.1103781] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 08/03/2011] [Indexed: 05/03/2023]
Abstract
BACKGROUND Bisphenol A (BPA) is one of the most prevalent chemicals in daily-use materials; therefore, human exposure to BPA is ubiquitous. The estrogenicity of BPA is generally mediated by nuclear estrogen receptors (ERs). However, low concentrations of BPA stimulate seminoma cell proliferation by an uncertain mechanism that does not involve activation of ERs. OBJECTIVE We investigated the possible promoting effects of low-concentration BPA and the possible mechanism(s) using the murine ER-β negative spermatogonial GC-1 cell line. METHODS AND RESULTS Using the specific signaling inhibitor, BPA at test concentrations ranging from 10-10 to 10-8 M markedly induced proliferation of GC-1 cells by activating both cGMP-dependent protein kinase (PKG) and epidermal growth factor receptor (EGFR) extracellular regulated kinase (ERK) pathways. BPA stimulated a rapid (15-min) phosphorylation of the transcription factor cAMP response element binding protein (CREB) and the cell cycle regulator retinoblastoma protein (Rb). Interestingly, ER-α phosphorylation is involved in the proliferation, whereas BPA does not directly transactivate ER-α in gene reporter assays. Using specific agonists and gene silencing, we further observed that BPA mediates the proliferation and fos gene expression of GC-1 cells by G protein-coupled receptor 30 (GPR30) and ER-α. CONCLUSIONS Our data suggest that low concentrations of BPA activate the PKG and EGFR/ERK/c-fos pathways through a cross-talk between GPR30 and ER-α, which in turn stimulates GC-1 cell proliferation. The present study provides a novel insight regarding the potential role of GPR30 and ER-α in mediating the proliferative effects of BPA in male germ cells.
Collapse
Affiliation(s)
- Zhi-Guo Sheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, People's Republic of China
| | | |
Collapse
|
49
|
Ismail N, Garas P, Blaustein JD. Long-term effects of pubertal stressors on female sexual receptivity and estrogen receptor-α expression in CD-1 female mice. Horm Behav 2011; 59:565-71. [PMID: 21376052 PMCID: PMC3085923 DOI: 10.1016/j.yhbeh.2011.02.010] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [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: 12/05/2010] [Revised: 02/16/2011] [Accepted: 02/19/2011] [Indexed: 11/20/2022]
Abstract
Exposure to stress during puberty can lead to long-term behavioral alterations. Female mice, of the inbred C57BL/6 strain, have been shown to display lower levels of sexual receptivity in adulthood when exposed to shipping stress or to an immune challenge during puberty. The present study investigated whether this effect can be extended to CD1 outbred mice and examined a possible mechanism through which exposure to stressors could suppress sexual receptivity. The results revealed that CD1 mice injected with lipopolysaccharide (LPS) or exposed to shipping stress at 6 weeks old display lower levels of sexual receptivity in response to estradiol and progesterone in adulthood than control mice. Moreover, mice exposed to shipping stress at 8 weeks old also displayed reduced sexual receptivity, but those injected with LPS at that time showed slightly reduced effects, suggesting that the sensitive pubertal period extends to 8 weeks of age in this strain of mice. The examination of estrogen receptor-α (ER-α) expression revealed that mice exposed to shipping stress during the sensitive period (6 weeks) display lower levels of ER-α expression in the medial preoptic area and the ventromedial nucleus and the arcuate nucleus of the hypothalamus than mice shipped at a younger age. These findings support the prediction that exposure to shipping stress or LPS during puberty decreases behavioral responsiveness to estradiol and progesterone in adulthood in an outbred strain of mice through enduring suppression of ER-α expression in some brain areas involved in the regulation of female sexual behavior.
Collapse
Affiliation(s)
- Nafissa Ismail
- Center for Neuroendocrine Studies, University of Massachusetts, Amherst, MA 01003, USA.
| | | | | |
Collapse
|
50
|
Simmons CD, Pabona JM, Zeng Z, Velarde MC, Gaddy D, Simmen FA, Simmen RCM. Response of adult mouse uterus to early disruption of estrogen receptor-alpha signaling is influenced by Krüppel-like factor 9. J Endocrinol 2010; 205:147-57. [PMID: 20164373 PMCID: PMC2972657 DOI: 10.1677/joe-09-0474] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [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] [Indexed: 01/06/2023]
Abstract
Inappropriate early exposure of the hormone-responsive uterus to estrogenic compounds is associated with increased risk for adult reproductive diseases including endometrial cancers. While the dysregulation of estrogen receptor-alpha (ESR1) signaling is well acknowledged to mediate early events in tumor initiation, mechanisms contributing to sustained ESR1 activity later in life and leading to induction of oncogenic pathways remain poorly understood. We had shown previously that the transcription factor Krüppel-like factor 9 (KLF9) represses ESR1 expression and activity in Ishikawa endometrial glandular epithelial cells. We hypothesized that KLF9 functions as a tumor suppressor, and that loss of its expression enhances ESR1 signaling. Here, we evaluated the contribution of KLF9 to early perturbations in uterine ESR1 signaling pathways elicited by the administration of synthetic estrogen diethylstilbestrol (DES) to wild-type (WT) and Klf9 null (KO) mice on postnatal days (PNDs) 1-5. Uterine tissues collected at PND84 were subjected to histological, immunological, and molecular analyses. Compared with WT mice, KO mice demonstrated larger endometrial glands and lower endometrial gland numbers; DES exposure exacerbated these differences. Loss of KLF9 expression resulted in increased glandular ESR1 immunoreactivity with DES, without effects on serum estradiol levels. Quantitative RT-PCR analyses indicated altered expression of uterine genes commonly dysregulated in endometrial cancers (Akt1, Mmp9, Slpi, and Tgfbeta1) and of those involved in growth regulation (Fos, Myc, Tert, and Syk), with loss of Klf9, alone or in concert with DES. Our data support a molecular network between KLF9 and ESR1 in the uterus, and suggest that silencing of KLF9 may contribute to endometrial dysfunctions initiated by aberrant estrogen action.
Collapse
Affiliation(s)
| | | | | | | | | | | | - R C M Simmen
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, Arkansas 72202, USA
| |
Collapse
|