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Barczyński B, Frąszczak K, Wertel I, Zakrzewska E, Zdunek M, Szumiło J, Kotarski J. Immunohistochemical Expression of LHRH Receptor in Different Compartments of Female Genital Tract in Patients With Endometrial Cancer. Appl Immunohistochem Mol Morphol 2022; 30:509-516. [PMID: 35777983 DOI: 10.1097/pai.0000000000001046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/16/2022] [Indexed: 11/26/2022]
Abstract
Luteinizing hormone-releasing hormone receptor (LHRHR) expression has been reported in various cancers, including endometrial neoplasms. Thus, LHRHR provides a potential point for therapeutic approach using LHRH analogs as carrier molecules for chemotherapeutic agents in this cancer population. However, clinical data did not prove any potential benefits for patients. We decided to assess LHRHR expression in patients with endometrial cancer to explain possible lack of efficacy in previous clinical reports. LHRHR expression was assessed immunohistochemically in different anatomic and histogenetic compartments of female genital tract of patients with endometrial cancer. The study sample consisted of paraffin tissue blocks obtained from patients who has undergone primary surgery owing to endometrial cancer. Strong LHRHR expression was found in endometrial cancer, fallopian tube, and concurrent atypical hyperplasia. Interestingly, LHRHR expression showed significant differences depending on the respective compartment of the ovary analyzed. Level of LHRHR expression in patients with primary advanced and unresectable disease, particularly in certain ovarian compartments may be substantially lower, which may influence the use of new targeted therapy regimens. The studies on secondary Müllerian system compartment and its hormonal receptor status may be crucial to understand mechanisms of lack of efficacy of LHRH hybrid molecules anti-cancer treatment.
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Affiliation(s)
| | | | - Iwona Wertel
- First Department of Oncological Gynaecology and Gynaecology
- Independent Laboratory of Cancer Diagnostics and Immunology, First Department of Oncological Gynaecology and Gynaecology
| | | | - Małgorzata Zdunek
- Department of Clinical Pathomorphology, Medical University in Lublin
| | - Justyna Szumiło
- Department of Clinical Pathomorphology, Medical University in Lublin
| | - Jan Kotarski
- First Department of Oncological Gynaecology and Gynaecology
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Sp B, J P, Mp K, Im R. Long-term effect of repeated deslorelin acetate treatment in bitches for reproduction control. Theriogenology 2021; 173:73-82. [PMID: 34339906 DOI: 10.1016/j.theriogenology.2021.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 11/17/2022]
Abstract
Long-acting gonadotropin-releasing hormone (GnRH) analogs, which are approved for male dogs and ferrets, have been used off-label to suppress estrus in bitches predisposed to the side effects of spaying. Health data from the past 12 years were evaluated from bitches without progestogen pretreatment that received deslorelin acetate (DA) to suppress estrus for the first time before the age of 4.5 years. The study population included 32 client-owned bitches repeatedly treated with either 4.7 mg or 9.4 mg DA implants for a period of 5.3 ± 3.4 years (range 0.5-11.3 years). Follow-up information concerning immediate side effects of DA occurring within five months after the first DA treatment (n = 23) as well as long-term side effects of sustained gonadal suppression occurring after five months up to three years (n = 2), three years up to five years (n = 2) or more than five years (n = 8) were assessed through a questionnaire. Treatment was considered successful if no major side effects requiring medical treatment occurred, which applied to 26 out of 32 (81 %) bitches. In the six remaining bitches, the following major side effects led to treatment discontinuation: persistent urinary incontinence (n = 1), reoccurring induced heat (n = 1), uterine disease (n = 3) and/or ovarian tumor (n = 3). The bitches recovered completely after surgical spaying and/or DA implant removal. Minor side effects that did not require therapy or affect animal welfare included body weight changes (n = 18), subtle behavioral changes (n = 13), induced heat (n = 12), coat changes (n = 11), pseudocyesis (n = 6), transient urinary incontinence (n = 4), and/or temporary thickening of the uterine wall with little anechogenic content (n = 2). To examine a possible causal relationship between adverse side effects and DA treatment, further studies should compare the frequency of pathologies between groups of GnRH-treated, intact and spayed bitches of similar breeds and ages. Nevertheless, DA application before the age of 4.5 years may be a means of postponing surgical spaying for several years in breeds at high risk for developing urinary incontinence. Before DA is used in bitches, owners should be fully informed regarding possible side effects.
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Affiliation(s)
- Brändli Sp
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - Palm J
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - Kowalewski Mp
- Institute of Veterinary Anatomy, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - Reichler Im
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland.
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Fjellaksel R, Moldes-Anaya A, Vasskog T, Oteiza A, Martin-Armas M, Hjelstuen OK, Hansen JH, Riss PJ, Sundset R. Evaluation by metabolic profiling and in vitro autoradiography of two promising GnRH-receptor ligands for brain SPECT imaging. J Labelled Comp Radiopharm 2020; 63:72-84. [PMID: 31813158 DOI: 10.1002/jlcr.3820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 10/04/2019] [Accepted: 12/03/2019] [Indexed: 11/07/2022]
Abstract
The increased expression of gonadotropin releasing hormone receptor (GnRH-R) in brain has been strongly linked to Alzheimer disease. Therefore, the development of radiolabeled imaging agents for GnRH-R is relevant for early diagnosis of Alzheimer disease. We have recently disclosed the discovery of two promising compounds displaying nanomolar-range affinity for the GnRH-R. In the present study, a preclinical evaluation of the compound properties was performed to evaluate their potential as single photon emission computed tomography (SPECT) radiotracers for imaging the GnRH-receptor. The compounds were assessed in vitro by performing serum stability analysis by human and rat serum, metabolic profiling by human liver microsomes, and exploratory rat brain autoradiography. The investigated compounds displayed satisfactory stability against human, rat serum, and liver microsomal metabolism, which favors their potential as SPECT-imaging agents. Additionally, we identified and quantified the formation rate of the metabolites by fragmentation of up to five mass spectrometric stages. The GnRH-R rat brain specificity of these compounds was tested in competition with a known ligand for the receptor and the in vitro autoradiography confirmed that compounds 3 and 4 binds to rat GnRH-R in different rat brain regions.
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Affiliation(s)
- Richard Fjellaksel
- Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- Drug Transport and Delivery Research Group, Department of Pharmacy, UiT The Arctic University of Norway, Tromsø, Norway
- Organic Chemistry Research Group, Department of Chemistry, UiT The Arctic University of Norway, Tromsø, Norway
- The PET Imaging Center, University Hospital of North Norway, Tromsø, Norway
| | - Angel Moldes-Anaya
- Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- The PET Imaging Center, University Hospital of North Norway, Tromsø, Norway
- Pharmacology Research Group, Department of Pharmacy, UiT The Arctic University of Norway, Tromsø, Norway
- Neurobiology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Terje Vasskog
- Natural Products and Medicinal Chemistry Research group, UiT The Arctic University of Norway, Tromsø, Norway
| | - Ana Oteiza
- Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- The PET Imaging Center, University Hospital of North Norway, Tromsø, Norway
| | - Montserrat Martin-Armas
- Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- The PET Imaging Center, University Hospital of North Norway, Tromsø, Norway
| | - Ole Kristian Hjelstuen
- Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- Drug Transport and Delivery Research Group, Department of Pharmacy, UiT The Arctic University of Norway, Tromsø, Norway
| | - Jørn H Hansen
- Organic Chemistry Research Group, Department of Chemistry, UiT The Arctic University of Norway, Tromsø, Norway
| | - Patrick J Riss
- Department of Neuropsychiatry and Psychosomatic Medicine, Oslo University Hospital, Oslo, Norway
- Realomics SFI, Department of Chemistry, University of Oslo, Oslo, Norway
- Norsk Medisinsk Syklotronsenter AS, Oslo, Norway
| | - Rune Sundset
- Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- The PET Imaging Center, University Hospital of North Norway, Tromsø, Norway
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Feng Z, Wen H, Ju X, Bi R, Chen X, Yang W, Wu X. Expression of hypothalamic-pituitary-gonadal axis-related hormone receptors in low-grade serous ovarian cancer (LGSC). J Ovarian Res 2017; 10:7. [PMID: 28122595 PMCID: PMC5264293 DOI: 10.1186/s13048-016-0300-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 12/19/2016] [Indexed: 02/07/2023] Open
Abstract
Background The aim of our study was to investigate the clinical features and expression levels of hypothalamic-pituitary-gonadal axis-related hormone receptors in low-grade serous ovarian cancer (LGSC). Methods We retrospectively investigated the clinical features of 26 consecutive patients with LGSC who underwent primary staging or debulking surgery between April 2005 and June 2013 in our center; concomitant primary high-grade serous ovarian cancer (HGSC) patients were randomly selected at a 2:1 ratio for comparison. Tissue microarrays were constructed from the LGSC and HGSC specimens, and the expression levels of six hormone receptors in the hypothalamic pituitary-gonadal axis were analyzed by immunohistochemistry. Results The median (range) age of patients with LGSC was 54 (27–77) years. According to the FIGO staging system, the cases were distributed as follows: stage I, 6 (23.1%); stage II, 0 (0%); stage III, 19 (73.1%); and stage IV, 1 (3.8%). The 2-year and 5-year overall survival rates for LGSC were 91.8% and 67.5%, respectively. The expression levels of the hormone receptors were as follows: ER, 80.8%; PR, 34.6%; AR, 53.8%; FSHR, 84.0%; LHR, 65.4%; and GnRHR, 100%. Hormone receptor-positive patients had a better prognosis compared with hormone receptor-negative patients, but the difference was not significant. Conclusions Our study presented a higher overall survival rate and distinctive hormone receptor expression levels of LGSC patients compared with the HGSC cohort. Patients with positive hormone receptor expression tended to have a better prognosis than the corresponding hormone receptor negative patients. Electronic supplementary material The online version of this article (doi:10.1186/s13048-016-0300-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zheng Feng
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, 270 Dong-an Road, Shanghai, 200032, China
| | - Hao Wen
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, 270 Dong-an Road, Shanghai, 200032, China
| | - Xingzhu Ju
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, 270 Dong-an Road, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Rui Bi
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - Xiaojun Chen
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, 270 Dong-an Road, Shanghai, 200032, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Wentao Yang
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - Xiaohua Wu
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, 270 Dong-an Road, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
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Feng Z, Wen H, Bi R, Ju X, Chen X, Yang W, Wu X. A clinically applicable molecular classification for high-grade serous ovarian cancer based on hormone receptor expression. Sci Rep 2016; 6:25408. [PMID: 27139372 PMCID: PMC4853732 DOI: 10.1038/srep25408] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 04/18/2016] [Indexed: 11/18/2022] Open
Abstract
To establish an effective hormone receptor-based molecular classification of high-grade serous ovarian cancer (HGSC), we retrospectively examined 875 consecutive HGSC patients who underwent primary surgery at our hospital and constructed tissue microarrays from these specimens. The expression levels of the hormone receptors were as follows: ER 64.4%, PR 12.6%, AR 35.6%, FSHR 54.5%, LHR 34.8%, and GnRHR 88.3%. Based on clustering of their expression patterns, we classified patients into five subgroups with distinctive clinical features (PR+, PR - ER + AR+, PR - ER + AR-, PR - ER - AR+, and PR - ER - AR-). Patients in the PR + group were younger compared to those in the other groups (p < 0.001). More patients were of advanced stage in the PR - ER + AR- group than the other groups (p = 0.020). A greater proportion of patients were sensitive to platinum-based chemotherapy in the PR - ER - AR + group compared with the other groups (p = 0.034). A trend of increasing risk of death was observed among these subgroups (p < 0.001). In the multivariate analysis, patients also had orderly increased hazard ratios for death in the PR + (HR = 2.256, 95% CI, 0.983-5.175), PR - ER + AR + (HR = 2.188, 95% CI, 1.004-4.796), PR - ER - AR- (HR = 2.316, 95% CI, 1.097-5.082) and PR - ER + AR- (HR = 2.928, 95% CI, 1.366-6.276) subgroups compared to the PR - ER - AR+ subgroup. Our classification could help predict patient clinical outcomes, guide individual treatments and stratify patients in future clinical trials.
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Affiliation(s)
- Zheng Feng
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Hao Wen
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Rui Bi
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Xingzhu Ju
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Xiaojun Chen
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Wentao Yang
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Xiaohua Wu
- Department of Gynecological Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
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Tsui KH, Lee WL, Seow KM, Yang LW, Wang SY, Wang PH, Chang CL, Yen MS, Cheng JT, Chen CP. Effect of gonadotropin-releasing hormone agonist on ES-2 ovarian cancer cells. Taiwan J Obstet Gynecol 2014; 53:35-42. [PMID: 24767644 DOI: 10.1016/j.tjog.2013.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2013] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE Gonadotropin-releasing hormone (GnRH) receptor is found in the ovarian tissue, including epithelial ovarian cancer (EOC), suggesting that GnRH agonists may have direct action on EOC. MATERIALS AND METHODS Ovarian clear cell cancer (ES-2) cells were treated with low-dose GnRH agonist with/without low-dose paclitaxel (1 μM D-Lys(6) with/without 0.5 μM or 1.0 μM paclitaxel). Growth and behavior of ES-2 cells were evaluated. RESULTS Use of either D-Lys(6) or paclitaxel or a combination of the two did not affect the morphology and growth pattern of ES-2 cells. However, ability of migration and invasion of ES-2 cells was significantly decreased in either use of D-Lys(6) or paclitaxel and more apparent with the combination. Type I GnRH receptor expression of ES-2 was not altered significantly by the combination. CONCLUSION GnRH agonist might modify the ES-2 ovarian cancer cells, and its role might be independent, additional or synergistic, suggesting the potential role of the use of GnRH agonist in the management of clear cell type of the ovarian cancer. However, the results of this study were derived using ES-2 ovarian cancer cells, and might not be valid in other cell types of ovarian cancers.
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Affiliation(s)
- Kuan-Hao Tsui
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Department of Biological Science, National Sun Yat-Sen University, Kaohsiung, Taiwan; Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Wen-Ling Lee
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Medicine, Cheng-Hsin General Hospital, Taipei, Taiwan; Department of Nursing, Oriental Institute of Technology, New Taipei City, Taiwan
| | - Kok-Min Seow
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Shih Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Lin-Wei Yang
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shih-Yi Wang
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Peng-Hui Wang
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan; Immunology Center, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
| | - Chi-Lun Chang
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ming-Shyen Yen
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jiin-Tsuey Cheng
- Department of Biological Science, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chih-Ping Chen
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
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Pazaitou-Panayiotou K, Chemonidou C, Poupi A, Koureta M, Kaprara A, Lambropoulou M, Constantinidis TC, Galaktidou G, Koffa M, Kiziridou A, Kakolyris S, Kolios G, Kortsaris A, Chatzaki E. Gonadotropin-releasing hormone neuropeptides and receptor in human breast cancer: correlation to poor prognosis parameters. Peptides 2013; 42:15-24. [PMID: 23287110 DOI: 10.1016/j.peptides.2012.12.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 12/14/2012] [Accepted: 12/17/2012] [Indexed: 12/26/2022]
Abstract
Expression of the two gonadotropin-releasing hormone homologue peptides GnRHI and GnRHII and their receptor GnRHR has been demonstrated in a number of malignancies. In hormone-dependent breast cancer, GnRH analogs are used for therapy in premenopausal women. Gene expression of GnRHI, II and R was studied in breast biopsies from primary breast adenocarcinoma obtained from the tumor and the adjacent benign tissue. Levels were evaluated by a multiplex real-time RT-PCR. GnRHI transcripts were detected in 14.7% of the benign and 29.4% malignant biopsies and GnRHII in 21.2% benign and 44.1% malignant biopsies. GnRHR was also more frequent in the malignant (54.2%) than in the benign (24.0%) biopsies, at similar expression levels. No transcripts were detected in biopsies from healthy individuals. There was a strong correlation between the presence of GnRHI and GnRHII transcripts and their receptor in the benign and the malignant biopsies. GnRHI, II and R expression correlated significantly with poor prognosis pathological parameters. Immunohistochemistry for GnRHR revealed expression in malignant cells and in epithelial cells of mammary ducts of the adjacent area with pre-cancerous features. In contrast, GnRH I and II peptides were rarely expressed at low levels in breast cancer cells. In conclusion GnRH peptides and receptor are expressed more frequently in breast tumors than in the adjacent mammary tissue, representing a malignant feature. Their expression correlated to tumor characteristics of poor prognosis and was therefore related to more aggressive malignancies. Concomitant expression of peptides and receptor supports an autocrine/paracrine regulating role.
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Lee G, Ge B. Growth inhibition of tumor cells in vitro by using monoclonal antibodies against gonadotropin-releasing hormone receptor. Cancer Immunol Immunother 2010; 59:1011-9. [PMID: 20182875 PMCID: PMC11030974 DOI: 10.1007/s00262-010-0823-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Accepted: 01/27/2010] [Indexed: 10/19/2022]
Abstract
As the continuation of a previous study, synthetic peptides corresponding to the extracellular domains of human gonadotropin-releasing hormone (GnRH) receptor were used to generate additional monoclonal antibodies which were further characterized biochemically and immunologically. Among those identified to recognize GnRH receptor, monoclonal antibodies designated as GHR-103, GHR-106 and GHR-114 were found to exhibit high affinity (Kd < or = 1 x 10(-8) M) and specificity to GnRH receptor as judged by the whole cell binding immunoassay and Western blot assay. Both anti-GnRH receptor monoclonal antibodies and GnRH were shown to compete for the same binding site of GnRH receptor on the surface of cultured cancer cells. Growth inhibitions of cancer cells cultured in vitro were demonstrated by cellular apoptosis experiments (TUNEL and MTT assays) under different conditions of treatment with GHR-106 monoclonal antibody or GnRH analogs. It was generally observed that both GnRH I and GHR-106 effectively induce the apoptosis of cultured cancer cells as determined by TUNEL and MTT assays. Consistently, suppressions of gene expressions at mRNA levels were demonstrated with several ribosomal proteins (P0, P1, P2 and L37), when cancer cells were incubated with GnRH or GHR-106. The widespread expressions of GnRH receptor in almost all of the studied human cancer cell lines were also demonstrated by RT-PCR and Western blot assay, as well as indirect immunofluorescence assay with either of these monoclonal antibodies as the primary antibody. In view of the longer half life of antibodies as compared to that of GnRH or its analogs, anti-GnRH receptor monoclonal antibodies in humanized forms could function as GnRH analogs and serve as an ideal candidate of anti-cancer drugs for therapeutic treatments of various cancers in humans as well as for fertility regulations.
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MESH Headings
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Antibody Affinity/immunology
- Antibody Specificity/immunology
- Apoptosis/drug effects
- Binding, Competitive/drug effects
- Blotting, Western
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Cell Survival/drug effects
- Dose-Response Relationship, Drug
- Fluorescent Antibody Technique, Indirect
- Gene Expression Regulation, Neoplastic/drug effects
- Gonadotropin-Releasing Hormone/metabolism
- Gonadotropin-Releasing Hormone/pharmacology
- HCT116 Cells
- Hep G2 Cells
- Humans
- Jurkat Cells
- Receptors, LHRH/genetics
- Receptors, LHRH/immunology
- Receptors, LHRH/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Ribosomal Proteins/genetics
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Affiliation(s)
- Gregory Lee
- Andrology Laboratory, UBC Center for Reproductive Health, The University of British Columbia, Vancouver, BC, V6H 3N1, Canada.
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9
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Poon SL, Hammond GT, Leung PCK. Epidermal growth factor-induced GnRH-II synthesis contributes to ovarian cancer cell invasion. Mol Endocrinol 2009; 23:1646-56. [PMID: 19608641 DOI: 10.1210/me.2009-0147] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
GnRH-II modulates ovarian cancer cells invasion and is expressed in normal ovary and ovarian epithelial cancer cells; however, the upstream regulator(s) of GnRH-II expression in these cells remains unclear. We now demonstrate that epidermal growth factor (EGF) increases GnRH-II mRNA levels in several human ovarian carcinoma cell lines and up-regulates GnRH-II promoter activity in OVCAR-3 cells in a dose-dependent manner, whereas an EGF receptor inhibitor (AG148) abolishes EGF-induced increases in GnRH-II promoter activity and GnRH-II mRNA levels. EGF increases the phosphorylation of cAMP-responsive element-binding protein (p-CREB) and its association with the coregulator, CCAAT/enhancer binding protein beta, whereas blocking the EGF-induced ERK1/2 phosphorylation with MAPK inhibitors (PD98059/U0126) markedly reduced these effects. Moreover, depletion of CREB using small interfering RNA attenuated EGF-induced GnRH-II promoter activity. Chromatin immunoprecipitation assays demonstrated that EGF induces p-CREB binding to a cAMP responsive-element within the GnRH-II promoter, likely in association with CCAAT/enhancer binding protein beta, and mutagenesis of this cAMP responsive-element prevented EGF-induced GnRH-II promoter activity in OVCAR-3 cells. Importantly, GnRH-II acts additively with EGF to promote invasion of OVCAR-3 and CaOV-3 cells, but not SKOV-3 cells that express low levels of GnRH receptor (GnRHR). Treatment with GnRHR small interfering RNA also partially inhibited the EGF-induced invasion of OVCAR-3 and CaOV-3 cells. Furthermore, EGF treatment transiently increases GnRHR levels in OVCAR-3 and CaOV-3, which likely accentuates the effects of increase GnRH-II production on cell invasion. These results provide evidence that EGF is an upstream regulator of the autocrine actions of GnRH-II on the invasive properties of ovarian cancer cells.
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Affiliation(s)
- Song Ling Poon
- Department of Obstetrics and Gynaecology, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada V6H 3V5
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10
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Cheung LWT, Wong AST. Gonadotropin-releasing hormone: GnRH receptor signaling in extrapituitary tissues. FEBS J 2008; 275:5479-95. [PMID: 18959738 DOI: 10.1111/j.1742-4658.2008.06677.x] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gonadotropin-releasing hormone (GnRH) has historically been known as a pituitary hormone; however, in the past few years, interest has been raised in locally produced, extrapituitary GnRH. GnRH receptor (GnRHR) was found to be expressed in normal human reproductive tissues (e.g. breast, endometrium, ovary, and prostate) and tumors derived from these tissues. Numerous studies have provided evidence for a role of GnRH in cell proliferation. More recently, we and others have reported a novel role for GnRH in other aspects of tumor progression, such as metastasis and angiogenesis. The multiple actions of GnRH could be linked to the divergence of signaling pathways that are activated by GnRHR. Recent observations also demonstrate cross-talk between GnRHR and growth factor receptors. Intriguingly, the classical G(alphaq)-11-phospholipase C signal transduction pathway, known to function in pituitary gonadotropes, is not involved in GnRH actions at nonpituitary targets. Herein, we review the key findings on the role of GnRH in the control of tumor growth, progression, and dissemination. The emerging role of GnRHR in actin cytoskeleton remodeling (small Rho GTPases), expression and/or activity of adhesion molecules (integrins), proteolytic enzymes (matrix metalloproteinases) and angiogenic factors is explored. The signal transduction mechanisms of GnRHR in mediating these activities is described. Finally, we discuss how a common GnRHR may mediate different, even opposite, responses to GnRH in the same tissue/cell type and whether an additional receptor(s) for GnRH exists.
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So WK, Cheng JC, Poon SL, Leung PCK. Gonadotropin-releasing hormone and ovarian cancer: a functional and mechanistic overview. FEBS J 2008; 275:5496-511. [DOI: 10.1111/j.1742-4658.2008.06679.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Wilkinson SJ, Kucukmetin A, Cross P, Darby S, Gnanapragasam VJ, Calvert AH, Robson CN, Edmondson RJ. Expression of gonadotrophin releasing hormone receptor I is a favorable prognostic factor in epithelial ovarian cancer. Hum Pathol 2008; 39:1197-204. [PMID: 18495208 DOI: 10.1016/j.humpath.2007.12.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2007] [Revised: 12/10/2007] [Accepted: 12/20/2007] [Indexed: 10/22/2022]
Abstract
The majority of epithelial ovarian cancers originate in the ovarian surface epithelium. The ovarian surface epithelium is a hormonally responsive tissue, and hormones are thought to play a key role in the development of this type of cancer. Gonadotrophin releasing hormone II is one of 2 isoforms which are thought to act through gonadotrophin releasing hormone receptor I, and gonadotrophin releasing hormone II has been shown to cause growth inhibition of cultured ovarian surface epithelium. The aim of this study was to investigate the expression levels and prognostic significance of gonadotrophin releasing hormone II and the gonadotrophin releasing hormone receptor I in epithelial ovarian cancer. Gonadotrophin releasing hormone II and gonadotrophin releasing hormone receptor I messenger RNA expression was examined in 23 cancers and 7 normal ovarian surface epithelium samples by quantitative real time polymerase chain reaction. An ovarian cancer tissue microarray containing 139 cases was constructed and immunohistochemical analysis of gonadotrophin releasing hormone II and gonadotrophin releasing hormone receptor I protein expression was performed and correlated with clinical outcome data. Gonadotrophin releasing hormone II messenger RNA expression was lower in cancer samples compared to normal ovarian surface epithelium samples (P < .05). Gonadotrophin releasing hormone II protein expression correlated with histologic subtype (25% serous versus 45% nonserous, P < .05) but not with overall survival. Gonadotrophin releasing hormone receptor I messenger RNA expression was highest in serous tumors when compared to non serous (P < .05) and normal tissue (P < .001). Expression of the gonadotrophin releasing hormone receptor I protein was also found to correlate with patient survival (P < .05). We have demonstrated gonadotrophin releasing hormone II and its receptor, gonadotrophin releasing hormone receptor I, are present in clinical ovarian samples, and that gonadotrophin releasing hormone receptor I protein expression is a favorable prognostic factor, suggesting these proteins play an important role in the development of epithelial ovarian cancer.
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Affiliation(s)
- S J Wilkinson
- Northern Institute for Cancer Research, Newcastle University, NE2 4HH Newcastle, UK.
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Chen CL, Cheung LWT, Lau MT, Choi JH, Auersperg N, Wang HS, Wong AST, Leung PCK. Differential role of gonadotropin-releasing hormone on human ovarian epithelial cancer cell invasion. Endocrine 2007; 31:311-20. [PMID: 17906381 DOI: 10.1007/s12020-007-0041-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2007] [Revised: 06/07/2007] [Accepted: 07/05/2007] [Indexed: 01/03/2023]
Abstract
Ovarian cancer is the most lethal of all gynecological cancers. Most deaths from ovarian cancer are due to widespread intraperitoneal metastases and malignant ascites. However, mechanisms of invasion in ovarian cancer remain poorly understood. In this study, we examined the effects of gonadotropin-releasing hormone (GnRH)-I (the classical mammalian GnRH), GnRH-II (a second form of GnRH), and GnRH receptor on invasion using two human ovarian carcinoma cell lines, OVCAR-3 and SKOV-3. Here we demonstrated that in OVCAR-3, GnRH-I and GnRH-II promoted cell invasion, whereas in SKOV-3, GnRH-I and GnRH-II inhibited cell invasion. Transfection of small interfering RNA to abrogate the gene expression of GnRH receptor reversed GnRH-I and GnRH-II-mediated invasion activities, suggesting that the same receptor, type I GnRH receptor, is essential for the effects of GnRH-I and GnRH-II in both OVCAR-3 and SKOV-3. Treatment of SKOV-3 cells with GnRH-I or GnRH-II resulted in a decrease in matrix metalloproteinase 2 but an increase in tissue inhibitor of metalloproteinase 2 secretions. In addition, we found that GnRH-I and GnRH-II interfered with activation of the phosphatidylinositol-3-kinase/AKT pathway that is well documented to stimulate proteolysis and invasion of ovarian cancer cells. Taken together, these observations suggest that GnRH-I and GnRH-II play key regulatory roles in ovarian tumor cell invasion and extracellular matrix degradation.
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Affiliation(s)
- Chien-Lin Chen
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan, China
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Cheung LWT, Leung PCK, Wong AST. Gonadotropin-releasing hormone promotes ovarian cancer cell invasiveness through c-Jun NH2-terminal kinase-mediated activation of matrix metalloproteinase (MMP)-2 and MMP-9. Cancer Res 2006; 66:10902-10. [PMID: 17108127 DOI: 10.1158/0008-5472.can-06-2217] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Gonadotropin-releasing hormone (GnRH) receptor is present in 80% of ovarian cancer, and numerous studies have provided evidence for a role of GnRH in cell proliferation. In this study, the effect of GnRH on the invasion potential of ovarian cancer cells was investigated. In vitro migration and cell invasion assays with the ovarian cancer cell lines Caov-3 and OVCAR-3 revealed the biphasic nature of GnRH; low concentrations of GnRH agonist (GnRHa) increased the cell motility and invasiveness of these cells, but at increased concentrations, the stimulatory effect was insignificant. Reverse transcription-PCR, Western blot, and gelatin zymography showed that the expression of metastasis-related proteinases, matrix metalloproteinase (MMP)-2 and MMP-9, was up-regulated and activated by GnRHa. Moreover, we observed that GnRHa was able to transactivate the MMP-2 and MMP-9 promoters. The invasive/migratory phenotype activated by GnRHa can be blocked by specific inhibitors or neutralizing antibodies to MMP-2 and MMP-9. Knockdown of the GnRH receptor using small interfering RNA significantly inhibited the GnRH-induced MMP activation, invasion, and migration. In addition, we showed that the c-Jun NH(2)-terminal kinase, but not extracellular signal-regulated kinase 1/2 or p38 mitogen-activated protein kinase, signaling pathway was critical for GnRH-mediated up-regulation of MMP, cell invasion, and motility. These results indicate for the first time an expanded role for GnRH in other aspects of ovarian tumor progression, such as metastasis, via activation of MMP and the subsequent increase in cell migration and invasion.
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Burov SV, Iablokova TV, Dorosh MI, Shkarubskaia ZP, Blank M, Epshteĭn N, Fridkin M. [Luliberin analogues exhibiting a cytotoxic effect on tumor cells in vitro]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2006; 32:459-66. [PMID: 17042263 DOI: 10.1134/s1068162006050037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Luliberin analogues modified at the N-terminus were synthesized to search for drugs exerting a cytotoxic effect on cells of hormone-dependent tumors. A synthetic scheme effective in the preparation of analogues containing fatty acid residues was proposed. The cytotoxic effect of the peptides was studied on a number of cell lines of human tumors in vitro. The dependence of the antitumor effect on the length of peptide chain, amino acid sequence, and structure of the N-terminal group was demonstrated. Modification with palmitic acid was found to result in highly active compounds in the case of analogues containing more than ten aa, whereas modifications with lauric, caproic, or trimethylacetic acid led to compounds with significantly lower activities. Analogues of luliberin containing a palmitic acid residue and effectively inhibiting the growth of tumor cells in vitro were synthesized.
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