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Zheng H, Kim M, Kim C, Kim Y, Cho PS, Lim JY, Lee H, Yun HI, Choi J, Hwang SW. GnRH peripherally modulates nociceptor functions, exacerbating mechanical pain. Front Mol Neurosci 2024; 17:1160435. [PMID: 38783903 PMCID: PMC11111891 DOI: 10.3389/fnmol.2024.1160435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
The function of peripheral nociceptors, the neurons that relay pain signals to the brain, are frequently tuned by local and systemic modulator substances. In this context, neurohormonal effects are emerging as an important modulatory mechanism, but many aspects remain to be elucidated. Here we report that gonadotropin-releasing hormone (GnRH), a brain-specific neurohormone, can aggravate pain by acting on nociceptors in mice. GnRH and GnRHR, the receptor for GnRH, are expressed in a nociceptor subpopulation. Administration of GnRH and its analogue, localized for selectively affecting the peripheral neurons, deteriorated mechanical pain, which was reproducible in neuropathic conditions. Nociceptor function was promoted by GnRH treatment in vitro, which appears to involve specific sensory transient receptor potential ion channels. These data suggest that peripheral GnRH can positively modulate nociceptor activities in its receptor-specific manner, contributing to pain exacerbation. Our study indicates that GnRH plays an important role in neurohormonal pain modulation via a peripheral mechanism.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Sun Wook Hwang
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
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2
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Moon S, Yun B, Lee M, Seok E, Ha J, Yang H. Gonadotropins Regulate the mRNA Expression of Gonadotropin-Releasing
Hormone and Its Receptors in the Mouse Ovary and Uterus. Dev Reprod 2024; 28:1-12. [PMID: 38654976 PMCID: PMC11034991 DOI: 10.12717/dr.2024.28.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/31/2024] [Accepted: 02/27/2024] [Indexed: 04/26/2024]
Abstract
Gonadotropin-releasing hormone (GnRH), a critical hormone produced in the hypothalamus, is essential for regulating reproductive processes. It has also been demonstrated the presence of GnRH and its receptors (GnRHR) in ovarian and uterine tissues, but little was known about the regulation mechanism of their expression in these organs and ovarian aging. Therefore, the aim of this study was to investigate the expression of GnRHR in the ovary and uterus of mice, particularly after high-dose gonadotropin treatments and in relation to aging. Quantitative real-time-PCR (qRT-PCR) revealed that pituitary gland had the highest GnRHR expression in both young and aged mice. In addition, liver expression was higher in young mice, whereas thymus expression was higher in aged mice. GnRHR mRNA was present in the ovaries of both young and aged mice but nearly undetectable in the uterus of aged mice. We next examined the expression of GnRHR in the ovary and uterus in response to high-dose administration of pregnant mare serum gonadotropin (PMSG). After PMSG administration, GnRH mRNA levels were significantly decreased in the ovary but increased in the uterus. The expression of GnRH mRNA in these organs showed opposite trends to that of GnRHR expression. These results suggest the involvement of GnRH in age-related reproductive decline and the potential effects of high-dose gonadotropin treatments on reproductive organ function.
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Affiliation(s)
- Soeun Moon
- Department of Bioenvironmental
Technology, College of Sciences Technology Convergence, Seoul Women’s
University, Seoul 01797, Korea
| | - Bokyeong Yun
- Department of Bioenvironmental
Technology, College of Sciences Technology Convergence, Seoul Women’s
University, Seoul 01797, Korea
| | - Minju Lee
- Department of Bioenvironmental
Technology, College of Sciences Technology Convergence, Seoul Women’s
University, Seoul 01797, Korea
| | - Eunji Seok
- Department of Biohealth Convergence,
College of Sciences Technology Convergence, Seoul Women’s
University, Seoul 01797, Korea
| | - Jinah Ha
- Department of Biohealth Convergence,
College of Sciences Technology Convergence, Seoul Women’s
University, Seoul 01797, Korea
| | - Hyunwon Yang
- Department of Biohealth Convergence,
College of Sciences Technology Convergence, Seoul Women’s
University, Seoul 01797, Korea
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3
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Bergami M, Manfrini O, Cenko E, Bugiardini R. Combined Therapy with Anthracyclines and GnRH Analogues for Breast Cancer: Impact on Ischemic Heart Disease. J Clin Med 2023; 12:6791. [PMID: 37959257 PMCID: PMC10648997 DOI: 10.3390/jcm12216791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/19/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
The combination of classic chemotherapy agents like anthracyclines with novel targeted medications has had a positive impact on women's survival from breast cancer. GnRH analogues are primarily employed to temporarily suppress ovarian function in premenopausal women with hormone-receptor-positive (HR+) breast cancer. Despite their benefits, the true degree of their collateral effects has been widely understudied, especially when it comes to ischemic heart disease. This review aims at summarizing the current state of the art on this issue, with particular focus on the risk for cardiotoxicity associated with the combined use of GnRH analogues and anthracyclines.
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Affiliation(s)
| | | | | | - Raffaele Bugiardini
- Laboratory of Epidemiological and Clinical Cardiology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (M.B.); (O.M.); (E.C.)
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4
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Biniari G, Markatos C, Nteli A, Tzoupis H, Simal C, Vlamis-Gardikas A, Karageorgos V, Pirmettis I, Petrou P, Venihaki M, Liapakis G, Tselios T. Rational Design, Synthesis and Binding Affinity Studies of Anthraquinone Derivatives Conjugated to Gonadotropin-Releasing Hormone (GnRH) Analogues towards Selective Immunosuppression of Hormone-Dependent Cancer. Int J Mol Sci 2023; 24:15232. [PMID: 37894912 PMCID: PMC10607160 DOI: 10.3390/ijms242015232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/06/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
Gonadotropin-releasing hormone (GnRH) is pivotal in regulating human reproduction and fertility through its specific receptors. Among these, gonadotropin-releasing hormone receptor type I (GnRHR I), which is a member of the G-protein-coupled receptor family, is expressed on the surface of both healthy and malignant cells. Its presence in cancer cells has positioned this receptor as a primary target for the development of novel anti-cancer agents. Moreover, the extensive regulatory functions of GnRH have underscored decapeptide as a prominent vehicle for targeted drug delivery, which is accomplished through the design of appropriate conjugates. On this basis, a rationally designed series of anthraquinone/mitoxantrone-GnRH conjugates (con1-con8) has been synthesized herein. Their in vitro binding affinities range from 0.06 to 3.42 nM, with six of them (con2-con7) demonstrating higher affinities for GnRH than the established drug leuprolide (0.64 nM). Among the mitoxantrone based GnRH conjugates, con3 and con7 show the highest affinities at 0.07 and 0.06 nM, respectively, while the disulfide bond present in the conjugates is found to be readily reduced by the thioredoxin (Trx) system. These findings are promising for further pharmacological evaluation of the synthesized conjugates with the prospect of performing future clinical studies.
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Affiliation(s)
- Georgia Biniari
- Department of Chemistry, University of Patras, 26504 Rion, Greece; (G.B.); (A.N.); (H.T.); (C.S.); (A.V.-G.)
| | - Christos Markatos
- Department of Pharmacology, School of Medicine, University of Crete, 71003 Heraklion, Greece; (C.M.); (V.K.)
| | - Agathi Nteli
- Department of Chemistry, University of Patras, 26504 Rion, Greece; (G.B.); (A.N.); (H.T.); (C.S.); (A.V.-G.)
| | - Haralambos Tzoupis
- Department of Chemistry, University of Patras, 26504 Rion, Greece; (G.B.); (A.N.); (H.T.); (C.S.); (A.V.-G.)
| | - Carmen Simal
- Department of Chemistry, University of Patras, 26504 Rion, Greece; (G.B.); (A.N.); (H.T.); (C.S.); (A.V.-G.)
| | - Alexios Vlamis-Gardikas
- Department of Chemistry, University of Patras, 26504 Rion, Greece; (G.B.); (A.N.); (H.T.); (C.S.); (A.V.-G.)
| | - Vlasios Karageorgos
- Department of Pharmacology, School of Medicine, University of Crete, 71003 Heraklion, Greece; (C.M.); (V.K.)
| | - Ioannis Pirmettis
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece; (I.P.); (P.P.)
| | - Panagiota Petrou
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece; (I.P.); (P.P.)
| | - Maria Venihaki
- Department of Clinical Chemistry, School of Medicine, University of Crete, 71003 Heraklion, Greece;
| | - George Liapakis
- Department of Pharmacology, School of Medicine, University of Crete, 71003 Heraklion, Greece; (C.M.); (V.K.)
| | - Theodore Tselios
- Department of Chemistry, University of Patras, 26504 Rion, Greece; (G.B.); (A.N.); (H.T.); (C.S.); (A.V.-G.)
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5
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Danti L, Lundin K, Sepponen K, Yohannes DA, Kere J, Tuuri T, Tapanainen JS. CRISPR/Cas9-mediated activation of NR5A1 steers female human embryonic stem cell-derived bipotential gonadal-like cells towards a steroidogenic cell fate. J Ovarian Res 2023; 16:194. [PMID: 37726790 PMCID: PMC10510196 DOI: 10.1186/s13048-023-01264-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/17/2023] [Indexed: 09/21/2023] Open
Abstract
The nuclear receptor subfamily 5 group A member 1 (NR5A1), encoding steroidogenic factor 1 (SF-1), has been identified as a critical factor in gonadal development in animal studies. A previous study of ours suggested that upregulation of NR5A1 during early gonadal differentiation in male (46,XY) human pluripotent stem cells steers the cells into a more mature gonadal cell type. However, the detailed role of NR5A1 in female gonadal differentiation has yet to be determined. In this study, by combining the processes of gonadal differentiation and conditional gene activation, we show that NR5A1 induction predominantly upregulates the female gonadal marker inhibin subunit α (INHA) and steroidogenic markers steroidogenic acute regulatory protein (STAR), cytochrome P450 family 11 subfamily A member 1 (CYP11A1), cytochrome P450 family 17 subfamily A member 1 (CYP17A1), hydroxy-delta-5-steroid dehydrogenase (HSD3B2) and hydroxysteroid 17-beta dehydrogenase 1 (HSD17B1). In contrast, NR5A1 induction did not seem to affect the bipotential gonadal markers gata binding protein 4 (GATA4) and Wilms' tumour suppressor 1 (WT1) nor the female gonadal markers r-spondin 1 (RSPO1) and wnt family member 4 (WNT4). Differentially expressed genes were highly associated with adrenal and ovarian steroidogenesis pathways. Moreover, time-series analysis revealed different dynamic changes between male and female induced samples, where continuously upregulated genes in female gonadal differentiation were mostly associated with adrenal steroidogenesis. Thus, in contrast to male gonadal differentiation, NR5A1 is necessary but not sufficient to steer human embryonic stem cell (hESC)-derived bipotential gonadal-like cells towards a more mature somatic, female cell fate. Instead, it seems to direct bipotential gonadal-like cells more towards a steroidogenic-like cell population. The information obtained in this study helps in elucidating the role of NR5A1 in gonadal differentiation of a female stem cell line.
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Affiliation(s)
- Laura Danti
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, 00290, Finland
| | - Karolina Lundin
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, 00290, Finland
| | - Kirsi Sepponen
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, 00290, Finland
| | - Dawit A Yohannes
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, 00290, Finland
- Research Programs Unit, Translational Immunology & Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, 00290, Finland
| | - Juha Kere
- Folkhälsan Research Centre, Stem Cells and Metabolism Research Program, University of Helsinki, Helsinki, 00290, Finland
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14183, Sweden
| | - Timo Tuuri
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, 00290, Finland
| | - Juha S Tapanainen
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, 00290, Finland.
- Department of Obstetrics and Gynecology, HFR - Cantonal Hospital of Fribourg and University of Fribourg, Fribourg, 1708, Switzerland.
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6
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Lahimer M, Djekkoun N, Tricotteaux-Zarqaoui S, Corona A, Lafosse I, Ali HB, Ajina M, Bach V, Benkhalifa M, Khorsi-Cauet H. Impact of Perinatal Coexposure to Chlorpyrifos and a High-Fat Diet on Kisspeptin and GnRHR Presence and Reproductive Organs. TOXICS 2023; 11:789. [PMID: 37755799 PMCID: PMC10534599 DOI: 10.3390/toxics11090789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023]
Abstract
Emerging evidence has indicated the involvement of extrahypothalamic Kisspeptin and GnRHR in reproductive function. In this study, we evaluate if maternal exposure to the pesticide chlorpyrifos (CPF) and/or a high-fat diet (HFD) has an impact on the expression of Kisspeptin and GnRHR in the reproductive organs of rats' offspring. A total of 16 pregnant rats are divided into four groups: a control group (n = 4), CPF group (4 rats exposed daily to 1/mg/kg/day), HFD group (4 rats randomly fed a 5.25 kcal/g HFD), and coexposed group (4 rats exposed to CPF and HDF). At postnatal development postnatal day (PND) 60, male and female offspring were sacrificed. The reproductive organs (ovary and testis) were removed, and histological and immunohistological analysis and in silico quantification (TissueGnostics software 6.0.1.102, TissueFAXS, HistoQuest) were applied to investigate the impact of different treatments on Kisspeptin and GnRHR expression in reproductive organs. The main outcomes of the study showed a significant decrease in rat offspring's body weight in the CPF group from PND30 and PND60 (p < 0.05 and p < 0.01, respectively). Histological analysis showed a significant increase in the atretic follicle and abnormal testis structure with germ cell desquamation in the CPF-exposed group. The immunodetection quantification of protein shows a significant decrease in GnRHR and Kisspeptin in the HFD and CPF exposed groups, respectively, in testis rat offspring. Perinatal exposure to CPF and HFD exposure affect the reproduction function of rat offspring.
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Affiliation(s)
- Marwa Lahimer
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
- ART and Reproductive Biology Laboratory, University Hospital and School of Medicine, CHU Sud, 80025 Amiens, France
- Exercise Physiology and Physiopathology: From Integrated to Molecular “Biology, Medicine and 9 Health” (Code: LR19ES09), Sousse 4002, Tunisia;
| | - Narimane Djekkoun
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Sophian Tricotteaux-Zarqaoui
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Aurélie Corona
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Isabelle Lafosse
- MP3CV—UPJV—UR 7517, Jules Verne University of Picardie, 80025 Amiens, France;
| | - Habib Ben Ali
- Laboratory Histology Embryology, Faculty of Medicine Sousse, University of Sousse, Sousse 4000, Tunisia;
| | - Mounir Ajina
- Exercise Physiology and Physiopathology: From Integrated to Molecular “Biology, Medicine and 9 Health” (Code: LR19ES09), Sousse 4002, Tunisia;
- Service of Reproductive Medicine, University Hospital Farhat Hached, Sousse 4000, Tunisia
| | - Véronique Bach
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Moncef Benkhalifa
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
- ART and Reproductive Biology Laboratory, University Hospital and School of Medicine, CHU Sud, 80025 Amiens, France
| | - Hafida Khorsi-Cauet
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
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7
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Chuphal B, Sathoria P, Rai U, Roy B. Crosstalk between reproductive and immune systems: the teleostean perspective. JOURNAL OF FISH BIOLOGY 2023; 102:302-316. [PMID: 36477945 DOI: 10.1111/jfb.15284] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
The bidirectional interaction between the hypothalamic-pituitary-gonadal (HPG) axis and the immune system plays a crucial role in the adaptation of an organism to its environment, its survival and the continuance of a species. Nonetheless, very little is known about this interaction among teleost, the largest group of extant vertebrates. Fishes being seasonal breeders, their immune system is exposed to seasonally changing levels of HPG hormones. On the contrary, the presence and infiltration of leukocytes, the expression of pattern recognition receptors as well as cytokines in gonads suggest their key role in teleostean gametogenesis as in the case of mammals. Moreover, the modulation of gametogenesis and steroidogenesis by lipopolysaccharide implicates the pathological significance of inflammation on reproduction. Thus, it is important to engage in the understanding of the interaction between these two important physiological systems, not only from a phylogenetic perspective but also due to the importance of fish as an important economic resource. In view of this, the authors have reviewed the crosstalk between the reproductive and immune systems in teleosts and tried to explore the importance of this interaction in their survival and reproductive fitness.
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Affiliation(s)
- Bhawna Chuphal
- Department of Zoology, University of Delhi, Delhi, India
| | - Priyanka Sathoria
- Department of Zoology, Maitreyi College, University of Delhi, Delhi, India
| | - Umesh Rai
- University of Jammu, Jammu, Jammu and Kashmir, India
| | - Brototi Roy
- Department of Zoology, Maitreyi College, University of Delhi, Delhi, India
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8
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Zhao G, Zhao X, Bai J, Dilixiati A, Song Y, Haire A, Zhao S, Aihemaiti A, Fu X, Wusiman A. Metabolomic and Transcriptomic Changes Underlying the Effects of L-Citrulline Supplementation on Ram Semen Quality. Animals (Basel) 2023; 13:217. [DOI: doi.org/10.3390/ani13020217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2024] Open
Abstract
This study examined the effects of L-Cit supplementation on ram semen quality through metabolomics and transcriptomics. A total of 16 rams were randomly categorized into two groups. The control group was fed a basic diet, whereas the experimental group received feed supplemented with 12 g/d of L-Cit. Semen and blood were collected from the rams on days 0 and 72 to measure sugar, pyruvate, amino acid, and nontargeted metabolite contents. Additionally, hypothalamic and testicular tissues were collected for a transcriptomic analysis. We found 27 differential metabolites between the control and experimental groups, of which 21 were downregulated (p < 0.05) and 6 were upregulated (p < 0.05). Compared with the control group, xylose and pyruvate contents in seminal plasma increased by 43.86% and 162.71%, respectively (p < 0.01). Additionally, the levels of 11 amino acids showed a significant increase in seminal plasma (p < 0.01). Furthermore, 961 and 715 differentially expressed genes were detected in the hypothalamic and testicular tissues, respectively. The pathways of significant enrichment in the hypothalamus and testes were protein digestion, absorption, glycolysis/gluconeogenesis, and amino as well as nucleotide sugar metabolisms. In the present study, L-Cit improved protein synthesis and blood metabolism, consequently increasing the contents of most amino acids in ram seminal plasma. Specifically, the hypothalamus controlled the expression of glycolysis/gluconeogenesis-related genes in the testes through its metabolites released into the serum, thereby providing energy for sperm production, which led to a decrease in the sugar content of seminal plasma.
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9
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Metabolomic and Transcriptomic Changes Underlying the Effects of L-Citrulline Supplementation on Ram Semen Quality. Animals (Basel) 2023; 13:ani13020217. [PMID: 36670757 PMCID: PMC9855076 DOI: 10.3390/ani13020217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/16/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
This study examined the effects of L-Cit supplementation on ram semen quality through metabolomics and transcriptomics. A total of 16 rams were randomly categorized into two groups. The control group was fed a basic diet, whereas the experimental group received feed supplemented with 12 g/d of L-Cit. Semen and blood were collected from the rams on days 0 and 72 to measure sugar, pyruvate, amino acid, and nontargeted metabolite contents. Additionally, hypothalamic and testicular tissues were collected for a transcriptomic analysis. We found 27 differential metabolites between the control and experimental groups, of which 21 were downregulated (p < 0.05) and 6 were upregulated (p < 0.05). Compared with the control group, xylose and pyruvate contents in seminal plasma increased by 43.86% and 162.71%, respectively (p < 0.01). Additionally, the levels of 11 amino acids showed a significant increase in seminal plasma (p < 0.01). Furthermore, 961 and 715 differentially expressed genes were detected in the hypothalamic and testicular tissues, respectively. The pathways of significant enrichment in the hypothalamus and testes were protein digestion, absorption, glycolysis/gluconeogenesis, and amino as well as nucleotide sugar metabolisms. In the present study, L-Cit improved protein synthesis and blood metabolism, consequently increasing the contents of most amino acids in ram seminal plasma. Specifically, the hypothalamus controlled the expression of glycolysis/gluconeogenesis-related genes in the testes through its metabolites released into the serum, thereby providing energy for sperm production, which led to a decrease in the sugar content of seminal plasma.
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10
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Wickramasuriya N, Hawkins R, Atwood C, Butler T. The roles of GnRH in the human central nervous system. Horm Behav 2022; 145:105230. [PMID: 35809386 PMCID: PMC9990468 DOI: 10.1016/j.yhbeh.2022.105230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 11/04/2022]
Abstract
It is widely known that GnRH plays a role in facilitating reproductive function via the HPG axis, and this was once believed to be its only function. However, over the last several decades important neuromodulatory roles of GnRH in multiple brain functions have been elucidated. Multiple GnRH isoforms and receptors have been detected outside the HPG-axis across different species. In this review, we focus on the human CNS where GnRH I and II isoforms and a functional GnRH I receptor have been isolated. We first describe the traditional understanding of GnRH within the hypothalamus and the pituitary and current clinical use of GnRH analogues. We then review the location and function of GnRH-producing neurons and receptors located outside the HPG axis. We next review the GnRH I and II neuron location and quantity and GnRH I receptor gene expression throughout the human brain, using the Allen Brain Map Atlas. This analysis demonstrates a wide expression of GnRH throughout the brain, including prominent expression in the basal forebrain and cerebellum. Lastly, we examine the potential role of GnRH in aging and inflammation and its therapeutic potential for neurodegenerative disease and spinal cord lesions.
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Affiliation(s)
- Nimmi Wickramasuriya
- Weill Cornell Medicine, Department of Radiology, 1305 York Ave #3F, New York, NY 1002, USA
| | - Robert Hawkins
- Weill Cornell Medicine, Department of Radiology, 1305 York Ave #3F, New York, NY 1002, USA
| | - Craig Atwood
- University of Wisconsin, Department of Medicine, 2500 Overlook Tce, Madison, WI 53705, USA
| | - Tracy Butler
- Weill Cornell Medicine, Department of Radiology, 1305 York Ave #3F, New York, NY 1002, USA.
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11
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The Role of Neuropeptide-Stimulated cAMP-EPACs Signalling in Cancer Cells. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27010311. [PMID: 35011543 PMCID: PMC8746471 DOI: 10.3390/molecules27010311] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/23/2021] [Accepted: 12/27/2021] [Indexed: 02/06/2023]
Abstract
Neuropeptides are autocrine and paracrine signalling factors and mainly bind to G protein-coupled receptors (GPCRs) to trigger intracellular secondary messenger release including adenosine 3′, 5′-cyclic monophosphate (cAMP), thus modulating cancer progress in different kind of tumours. As one of the downstream effectors of cAMP, exchange proteins directly activated by cAMP (EPACs) play dual roles in cancer proliferation and metastasis. More evidence about the relationship between neuropeptides and EPAC pathways have been proposed for their potential role in cancer development; hence, this review focuses on the role of neuropeptide/GPCR system modulation of cAMP/EPACs pathways in cancers. The correlated downstream pathways between neuropeptides and EPACs in cancer cell proliferation, migration, and metastasis is discussed to glimmer the direction of future research.
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12
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Li X, Zhang X, Shen Z, Chen Z, Wang H, Zhang X. GnRH receptor mediates lipid storage in female adipocytes via AMPK pathway. Int J Med Sci 2022; 19:1442-1450. [PMID: 36035370 PMCID: PMC9413554 DOI: 10.7150/ijms.74335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 08/03/2022] [Indexed: 11/05/2022] Open
Abstract
Objective: Due to high levels of serum gonadotropin-releasing hormone (GnRH), perimenopausal or menopausal women, girls with central precocious puberty, women of polycystic ovary syndrome, and females receiving long-term GnRH agonist (GnRHa) treatment are at substantially higher risk of developing obesity. However, it remains poorly understood how GnRH affects body weight. Here, we explored whether the gonadotropin-releasing hormone receptor (GnRHR) was expressed in adipocytes and how GnRHR mediated lipid accumulation and the development of obesity. Methods: The samples were from 18 patients with benign tumors operated between 01/2018 and 06/2018 at the Women's Hospital School of Medicine Zhejiang University. Immunofluorescence, Western Blotting, and RT-PCR were used to detect whether the GnRH receptor was expressed in the specimens and human preadipocytes-subcutaneous (HPA-s). The GnRH receptor agonist diphereline with different concentrations was used to stimulate the HPA-s cells for 24, 48, and CCK-8 was used to detect cell proliferation. Oil red-O staining was used to detect lipid droplets in mature adipocytes. The phosphorylation of AMPK-Ser485/Thr172 was detected by Western Blotting. Results: GnRH receptor was expressed in all 18 human subcutaneous adipose tissue specimens. Cultured HPA-s expressed the GnRH receptor, and the expression increased during the process of cell maturation. The GnRH receptor agonist diphereline can stimulate the proliferation of HPA-s cells, which can advance the earliest occurrence of lipid droplets in HPA-s cells and the occurrence of lipid droplets in 50% cells by 1-2 days. Diphereline can stimulate the increase in the number of lipid droplets in mature adipocytes. The phosphorylation level of AMPK-Ser485/Thr172 in mature adipocytes was decreased by diphereline. Conclusion: The GnRH receptor was expressed in adipocytes. As adipocytes mature, GnRH receptor expression gradually increased. GnRHa stimulates the proliferation of HPA-s, promotes adipocyte maturation, increases the formation of lipid droplets in mature adipocytes, and inhibits the activation of the AMPK pathway in adipocytes. Our findings may elucidate the mechanism of obesity in these female populations and provide some evidence on how GnRH contributes to obesity. Additionally, these results provide theoretical support for further research on the mechanisms of obesity, thus enhancing our understanding of the functional diversity of GnRH and establishing a new theoretical basis for the impact of GnRH on metabolism.
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Affiliation(s)
- Xiaoyong Li
- Department of Gynecology, Women's Hospital School of Medicine Zhejiang University, Hangzhou 310006, Zhejiang, People's Republic of China
| | - Xueyan Zhang
- Department of Gynecology, Women's Hospital School of Medicine Zhejiang University, Hangzhou 310006, Zhejiang, People's Republic of China
| | - Zhaojun Shen
- Department of Obstetrics and Gynecology, The Fourth Affiliated Hospital, School of Medicine Zhejiang University, Yiwu, 322000, Zhejiang, People's Republic of China
| | - Zhengyun Chen
- Department of Gynecology, Women's Hospital School of Medicine Zhejiang University, Hangzhou 310006, Zhejiang, People's Republic of China
| | - Hanzhi Wang
- Central laboratory, Women's Hospital School of Medicine Zhejiang University, Hangzhou 310006, Zhejiang, People's Republic of China
| | - Xinmei Zhang
- Department of Gynecology, Women's Hospital School of Medicine Zhejiang University, Hangzhou 310006, Zhejiang, People's Republic of China
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13
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Koloda YA, Denisova YV, Podzolkova NM. Genetic polymorphisms of reproductive hormones and their receptors in assisted reproduction technology for patients with polycystic ovary syndrome. Drug Metab Pers Ther 2021; 37:111-122. [PMID: 34851566 DOI: 10.1515/dmpt-2021-0123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 08/31/2021] [Indexed: 11/15/2022]
Abstract
Polycystic ovary syndrome (PCOS) is one of the most common endocrinopathies in women of childbearing, which is defined by the accumulation of multiple, small fluid-filled ovarian cysts without the selection of a single dominant follicle. Most PCOS phenotypes are characterized by the absence of spontaneous ovulation, resistance toward ovulation inductors, the production of a large immature oocytes number, and the high prevalence of ovarian hyperstimulation syndrome, resulting in reduced assisted reproductive technologies (ART) programs effectiveness. The review analyses current data about the relationship between polymorphism genotypes of KISS genes, follicle stimulating hormone (FSH), luteinizing hormone (LH), anti-Müllerian hormone (AMH) and their receptors genes, gonadotropin-releasing hormone (GnRH), estrogen, and progesterone receptors genes, the PCOS risk and the features of ovarian response to stimulation during ART cycles. The use of single nucleotide polymorphisms (SNPs) as prognostic markers of ART programs outcomes would provide a personalized approach to the drugs and doses choice for ovarian stimulation and significantly increase the chance of pregnancy.
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Affiliation(s)
- Yulia A Koloda
- Department of Obstetrics and Gynecology, Pediatric Faculty, FSBEI FPE "Russian Medical Academy of Continuous Professional Education" of the Ministry of Healthcare of the Russian Federation, Moscow, Russian Federation
| | - Yulia V Denisova
- Department of Obstetrics and Gynecology, Pediatric Faculty, FSBEI FPE "Russian Medical Academy of Continuous Professional Education" of the Ministry of Healthcare of the Russian Federation, Moscow, Russian Federation
| | - Natalia M Podzolkova
- Department of Obstetrics and Gynecology, Pediatric Faculty, FSBEI FPE "Russian Medical Academy of Continuous Professional Education" of the Ministry of Healthcare of the Russian Federation, Moscow, Russian Federation
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14
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Mills EG, Yang L, Nielsen MF, Kassem M, Dhillo WS, Comninos AN. The Relationship Between Bone and Reproductive Hormones Beyond Estrogens and Androgens. Endocr Rev 2021; 42:691-719. [PMID: 33901271 PMCID: PMC8599211 DOI: 10.1210/endrev/bnab015] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 12/20/2022]
Abstract
Reproductive hormones play a crucial role in the growth and maintenance of the mammalian skeleton. Indeed, the biological significance for this hormonal regulation of skeletal homeostasis is best illustrated by common clinical reproductive disorders, such as primary ovarian insufficiency, hypothalamic amenorrhea, congenital hypogonadotropic hypogonadism, and early menopause, which contribute to the clinical burden of low bone mineral density and increased risk for fragility fracture. Emerging evidence relating to traditional reproductive hormones and the recent discovery of newer reproductive neuropeptides and hormones has deepened our understanding of the interaction between bone and the reproductive system. In this review, we provide a contemporary summary of the literature examining the relationship between bone biology and reproductive signals that extend beyond estrogens and androgens, and include kisspeptin, gonadotropin-releasing hormone, follicle-stimulating hormone, luteinizing hormone, prolactin, progesterone, inhibin, activin, and relaxin. A comprehensive and up-to-date review of the recent basic and clinical research advances is essential given the prevalence of clinical reproductive disorders, the emerging roles of upstream reproductive hormones in bone physiology, as well as the urgent need to develop novel safe and effective therapies for bone fragility in a rapidly aging population.
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Affiliation(s)
- Edouard G Mills
- Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK
| | - Lisa Yang
- Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK
| | - Morten F Nielsen
- Department of Endocrinology, University Hospital of Odense & institute of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark
| | - Moustapha Kassem
- Department of Endocrinology, University Hospital of Odense & institute of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark.,Faculty of Health and Medical Sciences, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Waljit S Dhillo
- Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK.,Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK
| | - Alexander N Comninos
- Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK.,Department of Endocrinology, Imperial College Healthcare NHS Trust, London, UK.,Endocrine Bone Unit, Imperial College Healthcare NHS Trust, London, UK
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15
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MacLean CM, Godsafe Z, Soto-Forte P, Larsen F. Pharmacokinetic, Safety, and Pharmacodynamic Properties of Teverelix Trifluoroacetate, a Novel Gonadotropin-Releasing Hormone Antagonist, in Healthy Adult Subjects. Clin Pharmacol Drug Dev 2021; 11:257-269. [PMID: 34448368 DOI: 10.1002/cpdd.1008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/22/2021] [Indexed: 11/08/2022]
Abstract
Teverelix trifluoroacetate is a decapeptide, gonadotropin-releasing hormone antagonist that binds competitively and reversibly to gonadotropin-releasing hormone receptors in the pituitary gland, resulting in immediate suppression of luteinizing hormone and follicle-stimulating hormone, which in turn causes a very rapid decrease in testosterone production in the Leydig cells of the testes in men and in estradiol in the ovaries in women. This phase 1 clinical study was an open-label, parallel-design, single-center, single-dose study in older, healthy male subjects. Following injection, teverelix is released into the systemic circulation in a biphasic manner. An initial rapid phase is followed by a slow-release phase thought to be due to the formation of a depot, which limits the diffusion of teverelix into the blood. The release characteristics differ significantly for the subcutaneous (SC) and intramuscular (IM) routes. Teverelix maximum concentration and exposure increased in an approximately dose-proportional manner across the 60 to 120 mg SC doses. All 3 pharmacodynamic end points (luteinizing hormone, follicle-stimulating hormone, and total testosterone) showed reductions that were more prolonged following the 90 mg IM administration compared to 90 mg SC administration.
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Affiliation(s)
| | | | - Pablo Soto-Forte
- PAREXEL Early Phase Clinical Unit, Northwick Park Hospital, Harrow, UK
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16
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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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17
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Walkiewicz D, Wicik Z, Puzianowska-Kuznicka M. Gonadotropin-releasing hormone receptor pathway affects the function of human EBV-transformed B lymphocytes in an age-independent way. Exp Gerontol 2021; 152:111471. [PMID: 34256116 DOI: 10.1016/j.exger.2021.111471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 12/27/2022]
Abstract
Immune system function changes during aging, but the molecular mechanisms of this phenomenon are not fully understood. The present study identified pathways that are associated with age-associated changes in human B lymphocytes. Initial in silico analysis of 1355 genes involved in aging revealed the strongest association (p = 4.36E-21) with the gonadotropin-releasing hormone receptor (GnRHR) pathway. Extended analysis of 2736 aging-related genes using updated databases confirmed such association (p = 2.41E-16). Genes involved in both aging and the GnRHR pathway were significantly involved in lymphocyte B and T activation and aging-related phenotypes, including hyperinsulinemia and diabetes, arthritis, cerebrovascular disease, and cancers. We, therefore, examined non-tumorigenic Epstein-Barr virus (EBV)-transformed B-lymphocyte cell lines that originated from 12 young subjects (20-31 years old) and 10 centenarians (100-102 years old). Gonadotropin-releasing hormone I (GnRH-I) and GnRHR levels did not depend on the age of the cell donors. Inhibition of the GnRHR pathway age-independently decreased cell proliferation (p < 0.001) and increased apoptosis (p < 0.001). However, the decrease in immunoglobulin G synthesis (p < 0.01) was twice as high in centenarian cells than in young cells. In conclusion, the GnRHR pathway regulated essential properties of B lymphocytes. However, upon EBV transformation, memory class-switched B cells became the dominant cell subpopulation. Therefore, the observed effects of GnRHR inhibition were attributable to this subpopulation.
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Affiliation(s)
- Dorota Walkiewicz
- Department of Human Epigenetics, Mossakowski Medical Research Institute, PAS, 02-106 Warsaw, Poland; Department of Geriatrics and Gerontology, Medical Centre of Postgraduate Education, 01-813 Warsaw, Poland
| | - Zofia Wicik
- Department of Human Epigenetics, Mossakowski Medical Research Institute, PAS, 02-106 Warsaw, Poland.
| | - Monika Puzianowska-Kuznicka
- Department of Human Epigenetics, Mossakowski Medical Research Institute, PAS, 02-106 Warsaw, Poland; Department of Geriatrics and Gerontology, Medical Centre of Postgraduate Education, 01-813 Warsaw, Poland.
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18
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Morales L, Vallcaneras S, Delsouc MB, Filippa V, Aguilera-Merlo C, Fernández M, Casais M. Neuromodulatory effect of GnRH from coeliac ganglion on luteal regression in the late pregnant rat. Cell Tissue Res 2021; 384:487-498. [PMID: 33779845 DOI: 10.1007/s00441-021-03436-5] [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: 06/29/2020] [Accepted: 02/18/2021] [Indexed: 12/29/2022]
Abstract
The GnRH/GnRH receptor system has been found in several extrapituitary tissues, although its physiological significance has not yet been well established. Taking into account that the peripheral neural system can act as a modulator of pregnancy corpus luteum, the objective was to physiologically investigate the presence of the GnRH system in coeliac ganglion (CG) and to analyse its possible involvement in luteal regression through the superior ovarian nerve (SON) at the end of pregnancy in the rat. The integrated ex vivo CG-SON-Ovary system of rats on day 21 of pregnancy was used. Cetrorelix (CTX), a GnRH receptor antagonist, was added into the ganglionic compartment while the control systems were untreated. Ganglionic GnRH release was detected under basal conditions. Then, the CTX addition in CG increased it, which would indicate the blockade of the receptor. In turn, CTX in CG caused an increase in ovarian progesterone release. Furthermore, the luteal cells showed an increase in the expression of Hsd3b1 and a decrease in the expression of Akr1c3 (progesterone synthesis and degradation enzymes, respectively), reduced TUNEL staining according to an increase in the antioxidant defence system activity and low lipid peroxide levels. The ovarian and ganglionic nitric oxide (NO) release increased, while the luteal nitrotyrosine content, measured as nitrosative stress marker, decreased. CTX in CG decreased the ovarian noradrenaline release. The present study provides evidence that GnRH from CG may trigger neuronal signals that promote the luteal regression in late pregnancy by affecting the release of NO and noradrenaline in the ovary.
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Affiliation(s)
- Laura Morales
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - Sandra Vallcaneras
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - María Belén Delsouc
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - Verónica Filippa
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950, Bloque I, Piso No. 1, 5700, San Luis, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 5700, San Luis, Argentina
| | - Claudia Aguilera-Merlo
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950, Bloque I, Piso No. 1, 5700, San Luis, Argentina
| | - Marina Fernández
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), V. de Obligado 2490, C1428ADN, Buenos Aires, Argentina
| | - Marilina Casais
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina.
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19
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Díaz-Galindo C, Calderón-Vallejo D, Hernández-Jasso I, Cervantes-García D, Martínez-Díaz D, Ibarra-Martínez D, Muñoz-Ortega M, Quintanar JL. Gonadotropin-Releasing Hormone Receptor Expression in Human Spinal Cord. Neurochem Res 2020; 46:165-170. [PMID: 33206314 DOI: 10.1007/s11064-020-03178-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/03/2020] [Accepted: 11/11/2020] [Indexed: 11/27/2022]
Abstract
The expression of the gonadotrophin-releasing hormone receptor expression on pituitary gonadotrophs in humans is well characterized. In nervous system they have also been found in hippocampi and cerebral cortex. However, gonadotrophin-releasing hormone receptor expression in human spinal cord has not been reported. This study was to analyze the gonadotrophin-releasing hormone receptor expression in human spinal cord by immunohistochemistry, mRNAs by reverse transcriptase polymerase chain reaction, cDNA cloning and Western blot. The results show immunoreactive material to gonadotrophin-releasing hormone receptor in motoneurons of the spinal cord. Further, the study revealed that spinal cord expressed the gonadotrophin-releasing hormone receptor mRNA. The amplicon sequence corresponds to 100% of identity to GenBank. In Western blot, a band of 37 kDa were found in extracts of spinal cord and placenta as a control. In conclusion, human spinal cord expresses gonadotrophin-releasing hormone receptor analyzed through immunohistochemistry, the expression of its mRNA, cloning its cDNA and Western blot analysis. The presence of gonadotrophin-releasing hormone receptor in the spinal cord suggests the possibility of an extrapituitary functional role independent of reproductive system.
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Affiliation(s)
- Carmen Díaz-Galindo
- Department of Physiology and Pharmacology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Ciudad Universitaria, CP 20131, Aguascalientes, AGS, Mexico
| | - Denisse Calderón-Vallejo
- Department of Physiology and Pharmacology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Ciudad Universitaria, CP 20131, Aguascalientes, AGS, Mexico
- Department of Morphology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Irma Hernández-Jasso
- Department of Physiology and Pharmacology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Ciudad Universitaria, CP 20131, Aguascalientes, AGS, Mexico
| | - Daniel Cervantes-García
- Department of Microbiology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Diego Martínez-Díaz
- Department of Physiology and Pharmacology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Ciudad Universitaria, CP 20131, Aguascalientes, AGS, Mexico
| | - David Ibarra-Martínez
- Department of Morphology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Martín Muñoz-Ortega
- Department of Chemistry, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - J Luis Quintanar
- Department of Physiology and Pharmacology, Center of Basic Sciences, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Col. Ciudad Universitaria, CP 20131, Aguascalientes, AGS, Mexico.
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Bekker RBW, Fjellaksel R, Hjornevik T, Nuruddin S, Rafique W, Hansen JH, Sundset R, Haraldsen IH, Riss PJ. Discovery of a Lead Brain-Penetrating Gonadotropin-Releasing Hormone Receptor Antagonist with Saturable Binding in Brain. ChemMedChem 2020; 15:1624-1628. [PMID: 32677155 PMCID: PMC7540054 DOI: 10.1002/cmdc.202000256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/12/2020] [Indexed: 11/30/2022]
Abstract
We report the synthesis, radiosynthesis and biological characterisation of two gonadotropin-releasing hormone receptor (GnRH-R) antagonists with nanomolar binding affinity. A small library of GnRH-R antagonists was synthesised in 20-67 % overall yield with the aim of identifying a high-affinity antagonist capable of crossing the blood-brain barrier. Binding affinity to rat GnRH-R was determined by autoradiography in competitive-binding studies against [125 I]buserelin, and inhibition constants were calculated by using the Cheng-Prusoff equation. The radioligands were obtained in 46-79 % radiochemical yield and >95 % purity and with a molar activity of 19-38 MBq/nmol by direct nucleophilic radiofluorination. Positron emission tomography imaging in rat under baseline conditions in comparison to pretreatment with a receptor-saturating dose of GnRH antagonist revealed saturable uptake (0.1 %ID/mL) into the brain.
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Affiliation(s)
| | - Richard Fjellaksel
- Department of Clinical MedicineUiT The Arctic University of NorwayHansine Hansens veg 189019TromsøNorway
- PET Imaging CenterUniversity Hospital of North NorwaySykehusvegen 389019TromsøNorway
- Department of ChemistryUiT – The Arctic University of NorwayHansine Hansens veg 189019TromsøNorway
| | - Trine Hjornevik
- Department of Diagnostic PhysicsOslo University HospitalSognsvannsveien 200372OsloNorway
| | - Syed Nuruddin
- Norwegian Medical Cyclotron AS, RikshospitaletSognsvannsveien 20OsloNorway
| | - Waqas Rafique
- Department of ChemistryUniversity of OsloSem Sælands vei, 260371OsloNorway
| | - Jørn H. Hansen
- Department of ChemistryUiT – The Arctic University of NorwayHansine Hansens veg 189019TromsøNorway
| | - Rune Sundset
- Department of Clinical MedicineUiT The Arctic University of NorwayHansine Hansens veg 189019TromsøNorway
- PET Imaging CenterUniversity Hospital of North NorwaySykehusvegen 389019TromsøNorway
| | - Ira H. Haraldsen
- Clinical NeurosciencesOslo University Hospital-UllevalKirkeveien 166, post code?OsloNorway
| | - Patrick J. Riss
- Department of ChemistryUniversity of OsloSem Sælands vei, 260371OsloNorway
- Norwegian Medical Cyclotron AS, RikshospitaletSognsvannsveien 20OsloNorway
- Clinical NeurosciencesOslo University Hospital-UllevalKirkeveien 166, post code?OsloNorway
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Petrucci L, Maranesi M, Verini Supplizi A, Dall’Aglio C, Mandara MT, Quassinti L, Bramucci M, Miano A, Gobbetti A, Catone G, Boiti C, Zerani M. Kisspeptin/GnRH1 system in Leydig cells of horse (Equus caballus): Presence and function. Theriogenology 2020; 152:1-7. [DOI: 10.1016/j.theriogenology.2020.04.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 12/25/2022]
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Gonadotrophin-releasing hormone agonist triggering may improve central oocyte granularity and embryo quality. ZYGOTE 2020; 28:337-343. [PMID: 32241315 DOI: 10.1017/s0967199420000106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study aimed to describe outcomes in four women aged 28-34 years with central cytoplasmic granulation (CCG) of the oocytes who underwent in vitro fertilization/intracytoplasmic sperm injection (ICSI) using gonadotrophin-releasing hormone (GnRH) agonist to replace human chorionic gonadotrophin (hCG) as a trigger of final oocyte maturation. The initial ICSI procedure showed that all four women had CCG of the ooplasm and poor quality embryos. Subsequent ICSI used an antagonist protocol with a GnRH agonist trigger replacing the agonist protocol, plus hCG triggered ovulation. Ooplasm and embryo quality were improved in all four patients. All four became pregnant and gave birth to live infants. This study provides GnRH agonist triggering that may improve ooplasm granularity and embryo quality.
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NAV3, a Tumor Suppressor Gene, Is Decreased in Uterine Leiomyoma Tissue and Cells. Reprod Sci 2020; 27:925-934. [PMID: 32046415 DOI: 10.1007/s43032-019-00096-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/24/2019] [Indexed: 12/24/2022]
Abstract
NAV 3 is a tumor suppressor of unknown function in leiomyomas. The objective of this study is to assess NAV3 expression and its potential role in human uterine leiomyomas. NAV3 protein expression was examined in patient leiomyoma and patient-matched myometrial tissue samples by Western blot and immunohistochemistry. NAV3 mRNA and protein expression was assessed in leuprolide acetate- and cetrorelix-treated cell line leiomyoma samples. RNAseq analysis of placebo-treated leiomyoma compared with myometrium demonstrated the presence of transcripts encoding for several neuronal proteins. For NAV3, RNA sequence analysis demonstrated decreased expression in leiomyoma as compared with myometrium (0.86 ± 0.03 fold). Presence of NAV3 mRNA was also decreased in leiomyoma surgical samples (0.43 fold ± 0.05, p = 0.026) compared with patient-matched myometrium. Confirmatory qRT-PCR results on immortalized leiomyoma and myometrial cell lines similarly demonstrated a decrease in expression of NAV3 in leiomyomas (0.28 ± 0.02, p = 0.00075). Immunohistochemical analysis demonstrated a significant decrease in NAV 3 protein in leiomyomas (H-score 154.7 ± 6.2) as compared with myometrium (H-score; 312.5 ± 14.7, p < 0.0001). Leuprolide acetate-treated leiomyoma cells demonstrated an increase in NAV 3 mRNA expression (1.53 ± 0.13, p < 0.0001). Similarly, Western blot analysis on leuprolide-treated leiomyoma cells showed a non-significant increase in NAV 3 protein expression (1.26 ± 0.09, p = 0.063). NAV 3, a tumor suppressor in numerous cancers, is decreased in leiomyoma cells and tissue compared with myometrium, and increased by GnRH analog treatment, suggesting that NAV3 may mediate steroid hormone-independent leiomyoma regulation by GnRH analogs.
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Huerta-Reyes M, Maya-Núñez G, Pérez-Solis MA, López-Muñoz E, Guillén N, Olivo-Marin JC, Aguilar-Rojas A. Treatment of Breast Cancer With Gonadotropin-Releasing Hormone Analogs. Front Oncol 2019; 9:943. [PMID: 31632902 PMCID: PMC6779786 DOI: 10.3389/fonc.2019.00943] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/09/2019] [Indexed: 12/15/2022] Open
Abstract
Although significant progress has been made in the implementation of new breast cancer treatments over the last three decades, this neoplasm annually continues to show high worldwide rates of morbidity and mortality. In consequence, the search for novel therapies with greater effectiveness and specificity has not come to a stop. Among the alternative therapeutic targets, the human gonadotropin-releasing hormone type I and type II (hGnRH-I and hGnRH–II, respectively) and its receptor, the human gonadotropin-releasing hormone receptor type I (hGnRHR-I), have shown to be powerful therapeutic targets to decrease the adverse effects of this disease. In the present review, we describe how the administration of GnRH analogs is able to reduce circulating concentrations of estrogen in premenopausal women through their action on the hypothalamus–pituitary–ovarian axis, consequently reducing the growth of breast tumors and disease recurrence. Also, it has been mentioned that, regardless of the suppression of synthesis and secretion of ovarian steroids, GnRH agonists exert direct anticancer action, such as the reduction of tumor growth and cell invasion. In addition, we discuss the effects on breast cancer of the hGnRH-I and hGnRH-II agonist and antagonist, non-peptide GnRH antagonists, and cytotoxic analogs of GnRH and their implication as novel adjuvant therapies as antitumor agents for reducing the adverse effects of breast cancer. In conclusion, we suggest that the hGnRH/hGnRHR system is a promising target for pharmaceutical development in the treatment of breast cancer, especially for the treatment of advanced states of this disease.
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Affiliation(s)
- Maira Huerta-Reyes
- Unidad de Investigación Médica en Enfermedades Nefrológicas, Centro Médico Nacional Siglo XXI (CMN-SXXI), Instituto Mexicano del Seguro Social (IMSS), Hospital de Especialidades, Mexico City, Mexico
| | - Guadalupe Maya-Núñez
- Unidad de Investigación Médica en Medicina Reproductiva, IMSS, Unidad Médica de Alta Especialidad No. 4, Mexico City, Mexico
| | - Marco Allán Pérez-Solis
- Unidad de Investigación Médica en Medicina Reproductiva, IMSS, Unidad Médica de Alta Especialidad No. 4, Mexico City, Mexico
| | - Eunice López-Muñoz
- Unidad de Investigación Médica en Medicina Reproductiva, IMSS, Unidad Médica de Alta Especialidad No. 4, Mexico City, Mexico
| | - Nancy Guillén
- Centre National de la Recherche Scientifique, CNRS-ERL9195, Paris, France
| | - Jean-Christophe Olivo-Marin
- Unité d'Analyse d'Images Biologiques, Institut Pasteur, Paris, France.,Centre National de la Recherche Scientifique, CNRS-UMR3691, Paris, France
| | - Arturo Aguilar-Rojas
- Unidad de Investigación Médica en Medicina Reproductiva, IMSS, Unidad Médica de Alta Especialidad No. 4, Mexico City, Mexico.,Unité d'Analyse d'Images Biologiques, Institut Pasteur, Paris, France
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25
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Huang Q, Li Q, Chen H, Lin B, Chen D. Neuroendocrine immune-regulatory of a neuropeptide ChGnRH from the Hongkong oyster, Crassostrea Hongkongensis. FISH & SHELLFISH IMMUNOLOGY 2019; 93:911-916. [PMID: 31132465 DOI: 10.1016/j.fsi.2019.05.055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/15/2019] [Accepted: 05/23/2019] [Indexed: 06/09/2023]
Abstract
It is increasingly appreciated that neuroendocrine-immune interactions hold the key to understand the complex immune system. In this study, we explored the role of a reproductive regulation-related hormone, GnRH, in the regulation of immunity in Hong Kong oysters. We found that vibrio bacterial strains injection increased the expression of ChGnRH. Moreover, ChGnRH neuropeptide promotes the phagocytic ability and bacterial clearance effect of hemocytes which regarded to be the central immune organ. The content of cAMP after incubation with ChGnRH peptide was increased, which could be blocked by adenylyl cyclase inhibitor SQ 22,536. Furthermore, the stimulated effect of ChGnRH peptide on the phagocytosis and bacterial clearance was also blocked by SQ 22,536, H89 and enzastaurin, strongly demonstrating that cAMP dependent PKA and PKC signaling pathway was involved in ChGnRH mediated immune regulation. In conclusion, this study confirms the presence of neuroendocrine-immune regulatory system in marine invertebrates, which contributes to understand the complexity of oyster immune defense system.
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Affiliation(s)
- Qingsong Huang
- School of Life Sciences, Bioparmaceutics of Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Qiuhong Li
- School of Life Sciences, Bioparmaceutics of Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Hongmei Chen
- School of Life Sciences, Bioparmaceutics of Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Baohua Lin
- School of Life Sciences, Bioparmaceutics of Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Dongbo Chen
- School of Life Sciences, Bioparmaceutics of Guangdong Pharmaceutical University, Guangzhou, 510006, China.
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26
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Pinet K, McLaughlin KA. Mechanisms of physiological tissue remodeling in animals: Manipulating tissue, organ, and organism morphology. Dev Biol 2019; 451:134-145. [DOI: 10.1016/j.ydbio.2019.04.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 03/29/2019] [Accepted: 04/03/2019] [Indexed: 12/21/2022]
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Lee YS, Kang SU, Lee MH, Kim HJ, Han CH, Won HR, Park YU, Kim CH. GnRH impairs diabetic wound healing through enhanced NETosis. Cell Mol Immunol 2019; 17:856-864. [PMID: 31217526 DOI: 10.1038/s41423-019-0252-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 06/02/2019] [Indexed: 11/09/2022] Open
Abstract
It has been reported that neutrophil extracellular traps (NETs) impair wound healing in diabetes and that inhibiting NET generation (NETosis) improves wound healing in diabetic mice. Gonadotropin-releasing hormone (GnRH) agonists are associated with a greater risk of diabetes. However, the role of GnRH in diabetic wound healing is unclear. We determined whether GnRH-promoted NETosis and induced more severe and delayed diabetic wound healing. A mouse model of diabetes was established using five injections with streptozotocin. Mice with blood glucose levels >250 mg/dL were then used in the experiments. GnRH agonist treatment induced delayed wound healing and increased NETosis at the skin wounds of diabetic mice. In contrast, GnRH antagonist treatment inhibited GnRH agonist-induced delayed wound healing. The expression of NETosis markers PAD4 and citrullinated histone H3 were increased in the GnRH-treated diabetic skin wounds in diabetic mice and patients. In vitro experiments also showed that neutrophils expressed a GnRH receptor and that GnRH agonist treatment increased NETosis markers and promoted phorbol myristate acetate (PMA)-induced NETosis in mouse and human neutrophils. Furthermore, GnRH antagonist treatment suppressed the expression of NETosis markers and PMA-induced NETosis, which were increased by GnRH treatment. These results indicated that GnRH-promoted NETosis and that increased NETosis induced delayed wound healing in diabetic skin wounds. Thus, inhibition of GnRH might be a novel treatment of diabetic foot ulcers.
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Affiliation(s)
- Yun Sang Lee
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Republic of Korea
| | - Sung Un Kang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Republic of Korea
| | - Myung-Hoon Lee
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Haeng-Jun Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Chang-Hak Han
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Ho-Ryun Won
- Department of Otolaryngology, School of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Young Uk Park
- Department of Orthopedic Surgery, Ajou University, Suwon, Republic of Korea
| | - Chul-Ho Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Republic of Korea. .,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea.
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28
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Horicks F, Van Den Steen G, Gervy C, Clarke HJ, Demeestere I. Both in vivo FSH depletion and follicular exposure to Gonadotrophin-releasing hormone analogues in vitro are not effective to prevent follicular depletion during chemotherapy in mice. Mol Hum Reprod 2019; 24:221-232. [PMID: 29438534 DOI: 10.1093/molehr/gay005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 02/07/2018] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Does fertility preservation using gonadotrophin-releasing hormone (GnRH) analogues during chemotherapy act through a direct effect on the ovary or through inhibition of FSH secretion? SUMMARY ANSWER The absence of FSH in vivo and the direct exposition of ovarian follicles to GnRH analogues in vitro did not prevent chemotherapy-induced ovarian damage. WHAT IS KNOWN ALREADY The potential mechanisms of action of GnRH analogues in protecting ovaries against chemotherapy damage remain poorly understood. We previously showed that GnRH analogues have a limited inhibitory effect on gonadotropin secretion and follicular growth in mice. STUDY DESIGN SIZE, DURATION Mouse models were developed to independently evaluate (i) the indirect effect of FSH depletion on chemotherapy-induced ovarian damage using Fshb-deficient (-/-) mice to mimic the profound inhibition of FSH secretion during GnRH analogues treatment and (ii) the direct in vitro effect of GnRH agonist and antagonist in follicles exposed to chemotherapy using a follicular culture system. PARTICIPANTS/MATERIALS, SETTING, METHODS To assess the indirect effect of GnRH analogues through FSH inhibition, Fshb-/- mice were treated with 1 IU pregnant mare serum gonadotropin (control group) or saline (study group) for 7 days and with cyclophosphamide (200 mg/kg) on Day 5. Ovaries were collected 48 h post-cyclophosphamide to evaluate ovarian reserve, cellular apoptosis and proliferation. To evaluate the direct effects of GnRH analogues on growing follicles, isolated preantral follicles from prepubertal mice were cultured in vitro for 13 days with 1 μM GnRH analogues and 20 μM of 4-hydroperoxycyclophosphamide or not at Day 4. Oocytes were matured by adding epidermal growth factor (EGF)/hCG on Day 12. Follicular development, follicular survival, oocyte maturation rates, cAMP production, and steroidogenesis were evaluated. To assess the direct GnRH analogues effects on follicular reserve, whole neonatal ovaries were cultured in vitro under the same conditions for 2 days. Ovaries were processed 24 h post-chemotherapy for ovarian reserve, cellular apoptosis and proliferation analysis. MAIN RESULTS AND THE ROLE OF CHANCE Cyclophosphamide induced a significant follicular loss of more than 50% in Fshb-/- mice regardless of previous treatment with gonadotropins and no difference was observed in cell proliferation or apoptosis. In vitro experiments on growing follicles showed that 4-hydroperoxycyclophosphamide significantly decreased preantral follicle survival and maturation rates (55% and 37%, respectively) and delayed follicular development, regardless of the presence of GnRH analogues. Chemotherapy reduced granulosa cell numbers in all groups, while no change in cAMP production/106 granulosa cells was observed. Similarly, 4-hydroperoxycyclophosphamide induced apoptosis and significant follicular loss in cultured neonatal ovaries irrespective of GnRH analogues exposure. LIMITATIONS REASONS FOR CAUTION As ovarian GnRH receptors expression differs in humans and mice, further studies are needed to validate our results in human ovaries. WIDER IMPLICATIONS OF THE FINDINGS Our findings demonstrate that ovarian damage occurred even in the absence of FSH, suggesting that inhibition of the pituitary-gonadal axis is not involved in ovarian protection during GnRH analogues treatment. Using in vitro models, no evidence for direct protective effect of GnRH analogues against cyclophosphamide metabolite damage was observed. At present, clinical efficiency of GnRH analogues to prevent chemotherapy-induced ovarian damage remains highly debated and these experimental results reinforced the question as they did not bring evidence of direct or indirect mechanisms of protection. LARGE SCALE DATA N/A. STUDY FUNDING AND COMPETING INTEREST(S) This work was supported by the Belgian FNRS, 'Le Fonds Emile DEFAY', and 'La Fondation Rose et Jean Hoguet'. Authors have no conflict of interest to declare.
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Affiliation(s)
- F Horicks
- Research Laboratory on Human Reproduction, Université Libre de Bruxelles (ULB), 808 route de Lennik, 1070 Brussels, Belgium
| | - G Van Den Steen
- Research Laboratory on Human Reproduction, Université Libre de Bruxelles (ULB), 808 route de Lennik, 1070 Brussels, Belgium
| | - C Gervy
- Laboratory of Chemistry, Erasme Hospital, 808 route de Lennik, 1070 Brussels, Belgium
| | - H J Clarke
- Departments of Obstetrics and Gynaecology and Biology, McGill University; Research Institute - McGill University Health Centre, Glen Research Building, 1001 Decarie Blvd, Montreal, QC H4A3J1, Canada
| | - I Demeestere
- Research Laboratory on Human Reproduction, Université Libre de Bruxelles (ULB), 808 route de Lennik, 1070 Brussels, Belgium
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29
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Roy J, Kaake M, Low PS. Small molecule targeted NIR dye conjugate for imaging LHRH receptor positive cancers. Oncotarget 2019; 10:152-160. [PMID: 30719210 PMCID: PMC6349437 DOI: 10.18632/oncotarget.26520] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/12/2018] [Indexed: 11/25/2022] Open
Abstract
Overexpression of Luteinizing Hormone Releasing Hormone Receptor (LHRH-R) in various cancers and restricted expression of the receptor in healthy cells qualifies it as a valuable cancer biomarker. Previously, LHRH-R targeted peptides have been utilized to deliver attached payloads to LHRH-R expressing cancers. We report here for the first time the utilization of a small molecule non-peptidic ligand (BOEPL) of LHRH-R to deliver attached payloads to LHRH-R positive tumors. For this purpose, we linked the BOEPL ligand to a near infrared dye via various linkers. In vitro, these conjugates demonstrated low nanomolar binding affinity and in vivo they exhibited receptor-mediated uptake specifically in tumor tissue. Moreover, tumor uptake could be blocked by administration of excess unlabeled conjugate, and time course experiments showed retention of the dye conjugate in the tumor up to 12 h post injection. Because uptake of BOEPL-targeted NIR dye conjugates by nonmalignant organs/tissues was negligible and since the transient presence of targeted NIR dye in the kidneys was a result of clearance mechanism, we suggest that a BOEPL-targeted NIR dye might constitute a useful agent for fluorescence-guided surgery of LHRH-R positive cancers. Moreover, our results also provide proof of concept that BOEPL can be successfully used to deliver attached payloads to LHRH-R positive tumors in vivo.
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Affiliation(s)
- Jyoti Roy
- Purdue Institute for Drug Discovery, Purdue University, West Lafayette, IN 47907, USA.,Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Miranda Kaake
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Philip S Low
- Purdue Institute for Drug Discovery, Purdue University, West Lafayette, IN 47907, USA.,Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
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30
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Abstract
The hypothalamic decapeptide, GnRH, is the gatekeeper of mammalian reproductive development and function. Activation of specific, high-affinity cell surface receptors (GnRH receptors) on gonadotropes by GnRH triggers signal transduction cascades to stimulate the coordinated synthesis and secretion of the pituitary gonadotropins FSH and LH. These hormones direct gonadal steroidogenesis and gametogenesis, making their tightly regulated production and secretion essential for normal sexual maturation and reproductive health. FSH and LH are glycoprotein heterodimers comprised of a common α-subunit and a unique β-subunit (FSHβ and LHβ, respectively), which determines the biological specificity of the gonadotropins. The unique β-subunit is the rate-limiting step for the production of the mature gonadotropins. Therefore, FSH synthesis is regulated at the transcriptional level by Fshb gene expression. The overarching goal of this review is to expand our understanding of the mechanisms and pathways underlying the carefully orchestrated control of FSH synthesis and secretion by GnRH, focusing on the transcriptional regulation of the Fshb gene. Identification of these regulatory mechanisms is not only fundamental to our understanding of normal reproductive function but will also provide a context for the elucidation of the pathophysiology of reproductive disorders and infertility to lead to potential new therapeutic approaches.
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Affiliation(s)
- George A Stamatiades
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
- Yale New Haven Health, Bridgeport Hospital, Bridgeport, Connecticut
- School of Medicine, University of Crete, Heraklion, Greece
| | - Rona S Carroll
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Ursula B Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
- Correspondence: Ursula B. Kaiser, MD, Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital, 221 Longwood Avenue, Boston, Massachusetts 02115. E-mail:
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31
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Suo L, Chang X, Xu N, Ji H. The Anti-proliferative Activity of GnRH Through Downregulation of the Akt/ERK Pathways in Pancreatic Cancer. Front Endocrinol (Lausanne) 2019; 10:370. [PMID: 31263453 PMCID: PMC6590102 DOI: 10.3389/fendo.2019.00370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 05/24/2019] [Indexed: 11/20/2022] Open
Abstract
Gonadotropin-releasing hormone (GnRH) has been demonstrated to exert anti-proliferative functions on various tumor cells in endometrial, ovarian, bladder, or prostate cancer as a part of the autocrine system. In addition, the expression levels of GnRH and its receptor had been identified in breast cancer or non-reproductive cancers, such as glioblastoma and pancreatic cancer. Previous studies have reported abnormal GnRH expression in several malignant tumors, suggesting that GnRH and its receptor might be essential for tumourigenesis. In the present study, we attempted to clarify the mechanisms underlying GnRH function in cell proliferation in pancreatic cancer. Our results indicated that GnRH expression might be essential for the malignancy of pancreatic cancer. We then found that GnRH overexpression can induce cell apoptosis through activating the Bcl-2/Bax pathway and autophagy might be involved in the GnRH-mediated apoptosis in Panc1 cells. Further investigation showed that the inhibition of GnRH may promote tumor invasion and migration through upregulation of MMP2 expression in pancreatic cancer cells. Moreover, our results indicated that GnRH can regulate the Akt/ERK1/2 pathways to promote cell proliferation by inhibiting cell apoptosis in Panc1 cells. Therefore, our finding exhibited that the regulation of GnRH expression may be essential for tumourigenesis in pancreatic cancer, and might be a potential target for the treatment of the patients with pancreatic cancer.
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Affiliation(s)
- Linna Suo
- Department of Endocrinology and Metabolism, The Fourth Affiliated Hospital, China Medical University, Shenyang, China
| | - Xiaocen Chang
- Department of Endocrinology and Metabolism, The Fourth Affiliated Hospital, China Medical University, Shenyang, China
| | - Na Xu
- Natural Sciences Department, LaGuardia Community College, City University of New York, New York City, NY, United States
| | - Hongmei Ji
- Department of Endocrinology and Metabolism, The Fourth Affiliated Hospital, China Medical University, Shenyang, China
- *Correspondence: Hongmei Ji
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32
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Boonthum C, Namdee K, Khongkow M, Temisak S, Chatdarong K, Sajomsang W, Ponglowhapan S, Yata T. Gonadotropin-releasing hormone-modified chitosan as a safe and efficient gene delivery vector for spermatogonia cells. Reprod Domest Anim 2018; 53 Suppl 3:23-28. [DOI: 10.1111/rda.13346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 09/05/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Chatwalee Boonthum
- Department of Obstetrics, Gynaecology and Reproduction; Research Unit of Obstetrics and Reproduction in Animals; Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
| | - Katawut Namdee
- National Nanotechnology Centre (NANOTEC); National Science and Technology Development Agency; Pathumthani Thailand
| | - Mattaka Khongkow
- National Nanotechnology Centre (NANOTEC); National Science and Technology Development Agency; Pathumthani Thailand
| | - Sasithont Temisak
- Bio Analysis Group, Chemical Metrology and Biometry Department; National Institute of Metrology (NIMT); Pathumthani Thailand
| | - Kaywalee Chatdarong
- Department of Obstetrics, Gynaecology and Reproduction; Research Unit of Obstetrics and Reproduction in Animals; Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
| | - Warayuth Sajomsang
- National Nanotechnology Centre (NANOTEC); National Science and Technology Development Agency; Pathumthani Thailand
| | - Suppawiwat Ponglowhapan
- Department of Obstetrics, Gynaecology and Reproduction; Research Unit of Obstetrics and Reproduction in Animals; Faculty of Veterinary Science; Chulalongkorn University; Bangkok Thailand
| | - Teerapong Yata
- National Nanotechnology Centre (NANOTEC); National Science and Technology Development Agency; Pathumthani Thailand
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Fjellaksel R, Oteiza A, Martin-Armas M, Riss PJ, Hjelstuen OK, Kuttner S, Hansen JH, Sundset R. First in vivo evaluation of a potential SPECT brain radiotracer for the gonadotropin releasing hormone receptor. BMC Res Notes 2018; 11:811. [PMID: 30442192 PMCID: PMC6238273 DOI: 10.1186/s13104-018-3924-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 11/09/2018] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES In vivo evaluations of a gonadotropin releasing hormone-receptor single photon emission computed tomography radiotracer for non-invasive detection of gonadotropin releasing homone-receptors in brain. RESULTS We have used a simple, robust and high-yielding procedure to radiolabel an alpha-halogenated bioactive compound with high radiochemical yield. Literature findings showed similar alpha-halogenated compounds suitable for in vivo evaluations. The compound was found to possess nano molar affinity for the gonadotropin releasing hormone-receptor in a competition dependent inhibition study. Furthermore, liquid chromatography-mass spectrometry analysis in saline, human and rat serum resulted in 46%, 52% and 44% stability after incubation for 1 h respectively. In addition, rat brain single photon emission computed tomography and biodistribution studies gave further insight into the nature of the compound as a radiotracer.
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Affiliation(s)
- Richard Fjellaksel
- Medical Imaging 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
| | - Ana Oteiza
- Medical Imaging 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
- Medical Imaging 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
| | - 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, Postboks 4950, Nydalen, Oslo, Norway
| | - Ole Kristian Hjelstuen
- Drug Transport and Delivery Research Group, Department of Pharmacy, UiT The Arctic University of Norway, Tromsø, Norway
| | - Samuel Kuttner
- Medical Imaging 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
| | - Jørn H. Hansen
- Organic Chemistry Research Group, Department of Chemistry, UiT The Arctic University of Norway, Tromsø, Norway
| | - Rune Sundset
- Medical Imaging 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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Heck AL, Crestani CC, Fernández-Guasti A, Larco DO, Mayerhofer A, Roselli CE. Neuropeptide and steroid hormone mediators of neuroendocrine regulation. J Neuroendocrinol 2018; 30:e12599. [PMID: 29645316 PMCID: PMC6181757 DOI: 10.1111/jne.12599] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/27/2018] [Accepted: 04/04/2018] [Indexed: 12/15/2022]
Abstract
To maintain the health and well-being of all mammals, numerous aspects of physiology are controlled by neuroendocrine mechanisms. These mechanisms ultimately enable communication between neurones and glands throughout the body and are centrally mediated by neuropeptides and/or steroid hormones. A recent session at the International Workshop in Neuroendocrinology highlighted the essential roles of some of these neuropeptide and steroid hormone mediators in the neuroendocrine regulation of stress-, reproduction- and behaviour-related processes. Accordingly, the present review highlights topics presented in this session, including the role of the neuropeptides corticotrophin-releasing factor and gonadotrophin-releasing hormone in stress and reproductive physiology, respectively. Additionally, it details an important role for gonadal sex steroids in the development of behavioural sex preference.
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Affiliation(s)
- Ashley L. Heck
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO USA 80523
| | - Carlos C. Crestani
- Laboratory of Pharmacology, São Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara, SP, Brazil 14800-903
| | | | | | - Artur Mayerhofer
- Biomedical Center, Cell Biology, Anatomy III, Ludwig-Maximilian-University (LMU), Planegg, Germany 82152
| | - Charles E. Roselli
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, OR USA 97239-3098
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Lajkó E, Spring S, Hegedüs R, Biri-Kovács B, Ingebrandt S, Mező G, Kőhidai L. Comparative cell biological study of in vitro antitumor and antimetastatic activity on melanoma cells of GnRH-III-containing conjugates modified with short-chain fatty acids. Beilstein J Org Chem 2018; 14:2495-2509. [PMID: 30344773 PMCID: PMC6178282 DOI: 10.3762/bjoc.14.226] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 08/30/2018] [Indexed: 01/10/2023] Open
Abstract
Background: Peptide hormone-based targeted tumor therapy is an approved strategy to selectively block the tumor growth and spreading. The gonadotropin-releasing hormone receptors (GnRH-R) overexpressed on different tumors (e.g., melanoma) could be utilized for drug-targeting by application of a GnRH analog as a carrier to deliver a covalently linked chemotherapeutic drug directly to the tumor cells. In this study our aim was (i) to analyze the effects of GnRH-drug conjugates on melanoma cell proliferation, adhesion and migration, (ii) to study the mechanisms of tumor cell responses, and (iii) to compare the activities of conjugates with the free drug. Results: In the tested conjugates, daunorubicin (Dau) was coupled to 8Lys of GnRH-III (GnRH-III(Dau=Aoa)) or its derivatives modified with 4Lys acylated with short-chain fatty acids (acetyl group in [4Lys(Ac)]-GnRH-III(Dau=Aoa) and butyryl group in [4Lys(Bu)]-GnRH-III(Dau=Aoa)). The uptake of conjugates by A2058 melanoma model cells proved to be time dependent. Impedance-based proliferation measurements with xCELLigence SP system showed that all conjugates elicited irreversible tumor growth inhibitory effects mediated via a phosphoinositide 3-kinase-dependent signaling. GnRH-III(Dau=Aoa) and [4Lys(Ac)]-GnRH-III(Dau=Aoa) were shown to be blockers of the cell cycle in the G2/M phase, while [4Lys(Bu)]-GnRH-III(Dau=Aoa) rather induced apoptosis. In short-term, the melanoma cell adhesion was significantly increased by all the tested conjugates. The modification of the GnRH-III in position 4 was accompanied by an increased cellular uptake, higher cytotoxic and cell adhesion inducer activity. By studying the cell movement of A2058 cells with a holographic microscope, it was found that the migratory behavior of melanoma cells was increased by [4Lys(Ac)]-GnRH-III(Dau=Aoa), while the GnRH-III(Dau=Aoa) and [4Lys(Bu)]-GnRH-III(Dau=Aoa) decreased this activity. Conclusion: Internalization and cytotoxicity of the conjugates showed that GnRH-III peptides could guard Dau to melanoma cells and promote antitumor activity. [4Lys(Bu)]-GnRH-III(Dau=Aoa) possessing the butyryl side chain acting as a “second drug” proved to be the best candidate for targeted tumor therapy due to its cytotoxicity and immobilizing effect on tumor cell spreading. The applicability of impedimetry and holographic phase imaging for characterizing cancer cell behavior and effects of targeted chemotherapeutics with small structural differences (e.g., length of the side chain in 4Lys) was also clearly suggested.
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Affiliation(s)
- Eszter Lajkó
- Department Genetics, Cell- and Immunobiology, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary
| | - Sarah Spring
- Department Genetics, Cell- and Immunobiology, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary.,Department of Informatics and Microsystem Technology, University of Applied Sciences Kaiserslautern, Amerikastraße 1, 66482 Zweibrücken, Germany
| | - Rózsa Hegedüs
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Beáta Biri-Kovács
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary.,Eötvös Loránd University, Faculty of Science, Institute of Chemistry, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Sven Ingebrandt
- Department of Informatics and Microsystem Technology, University of Applied Sciences Kaiserslautern, Amerikastraße 1, 66482 Zweibrücken, Germany
| | - Gábor Mező
- Research Group of Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary.,Eötvös Loránd University, Faculty of Science, Institute of Chemistry, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - László Kőhidai
- Department Genetics, Cell- and Immunobiology, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary
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Stamatiades GA, Kaiser UB. Gonadotropin regulation by pulsatile GnRH: Signaling and gene expression. Mol Cell Endocrinol 2018; 463:131-141. [PMID: 29102564 PMCID: PMC5812824 DOI: 10.1016/j.mce.2017.10.015] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/27/2017] [Accepted: 10/27/2017] [Indexed: 12/12/2022]
Abstract
The precise orchestration of hormonal regulation at all levels of the hypothalamic-pituitary-gonadal axis is essential for normal reproductive function and fertility. The pulsatile secretion of hypothalamic gonadotropin-releasing hormone (GnRH) stimulates the synthesis and release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) by pituitary gonadotropes. GnRH acts by binding to its high affinity seven-transmembrane receptor (GnRHR) on the cell surface of anterior pituitary gonadotropes. Different signaling cascades and transcriptional mechanisms are activated, depending on the variation in GnRH pulse frequency, to stimulate the synthesis and release of FSH and LH. While changes in GnRH pulse frequency may explain some of the differential regulation of FSH and LH, other factors, such as activin, inhibin and sex steroids, also contribute to gonadotropin production. In this review, we focus on the transcriptional regulation of the gonadotropin subunit genes and the signaling pathways activated by pulsatile GnRH.
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Affiliation(s)
- George A Stamatiades
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Ursula B Kaiser
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States.
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Abstract
Gonadotropin-releasing hormone (GnRH) is recognized as the central regulator of the functions of the pituitary-gonadal axis. The increasing knowledge on the mechanisms controlling the development and the function of GnRH-producing neurons is leading to a better diagnostic and therapeutic approach for hypogonadotropic hypogonadisms and for alterations of the puberty onset. During female life span, the function of the GnRH pulse generator may be affected by a number of inputs from other neuronal systems, offering alternative strategies for diagnostic and therapeutic interventions. Moreover, the identification of a GnRH/GnRH receptor system in both human ovary and endometrium has widened the spectrum of action of the peptide outside its hypothalamic functions. The pharmacological use of GnRH itself or its synthetic analogs (agonists and antagonists) provides a valid tool to either stimulate or block gonadotropin secretion and to modulate the female fertility in several reproductive disorders and in assisted reproduction technology. The use of GnRH agonists in young female patients undergoing chemotherapy is also considered a promising therapeutic approach to counteract iatrogenic ovarian failure.
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Martínez-Moreno CG, Calderón-Vallejo D, Harvey S, Arámburo C, Quintanar JL. Growth Hormone (GH) and Gonadotropin-Releasing Hormone (GnRH) in the Central Nervous System: A Potential Neurological Combinatory Therapy? Int J Mol Sci 2018; 19:E375. [PMID: 29373545 PMCID: PMC5855597 DOI: 10.3390/ijms19020375] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 01/21/2018] [Accepted: 01/23/2018] [Indexed: 12/15/2022] Open
Abstract
This brief review of the neurological effects of growth hormone (GH) and gonadotropin-releasing hormone (GnRH) in the brain, particularly in the cerebral cortex, hypothalamus, hippocampus, cerebellum, spinal cord, neural retina, and brain tumors, summarizes recent information about their therapeutic potential as treatments for different neuropathologies and neurodegenerative processes. The effect of GH and GnRH (by independent administration) has been associated with beneficial impacts in patients with brain trauma and spinal cord injuries. Both GH and GnRH have demonstrated potent neurotrophic, neuroprotective, and neuroregenerative action. Positive behavioral and cognitive effects are also associated with GH and GnRH administration. Increasing evidence suggests the possibility of a multifactorial therapy that includes both GH and GnRH.
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Affiliation(s)
- Carlos G Martínez-Moreno
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Campus Juriquilla, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro 76230, Mexico.
| | - Denisse Calderón-Vallejo
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Ciudad Universitaria, Aguascalientes 20131, Mexico.
| | - Steve Harvey
- Department of Physiology, University of Alberta, Edmonton, AB T6G 2H7, Canada.
| | - Carlos Arámburo
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Campus Juriquilla, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro 76230, Mexico.
| | - José Luis Quintanar
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Ciudad Universitaria, Aguascalientes 20131, Mexico.
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Almeida-Marrero V, van de Winckel E, Anaya-Plaza E, Torres T, de la Escosura A. Porphyrinoid biohybrid materials as an emerging toolbox for biomedical light management. Chem Soc Rev 2018; 47:7369-7400. [DOI: 10.1039/c7cs00554g] [Citation(s) in RCA: 136] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The present article reviews the most important developing strategies in light-induced nanomedicine, based on the combination of porphyrinoid photosensitizers with a wide variety of biomolecules and biomolecular assemblies.
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Affiliation(s)
| | | | - Eduardo Anaya-Plaza
- Departamento de Química Orgánica
- Universidad Autónoma de Madrid
- Cantoblanco 28049
- Spain
| | - Tomás Torres
- Departamento de Química Orgánica
- Universidad Autónoma de Madrid
- Cantoblanco 28049
- Spain
- Institute for Advanced Research in Chemistry (IAdChem)
| | - Andrés de la Escosura
- Departamento de Química Orgánica
- Universidad Autónoma de Madrid
- Cantoblanco 28049
- Spain
- Institute for Advanced Research in Chemistry (IAdChem)
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40
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Bao C, Yang Y, Huang H, Ye H. Inhibitory Role of the Mud Crab Short Neuropeptide F in Vitellogenesis and Oocyte Maturation via Autocrine/Paracrine Signaling. Front Endocrinol (Lausanne) 2018; 9:390. [PMID: 30057569 PMCID: PMC6053504 DOI: 10.3389/fendo.2018.00390] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/25/2018] [Indexed: 11/16/2022] Open
Abstract
Neuropeptides, in addition to their classical role in the nervous system, act on intraovarian factors to regulate reproductive functions in vertebrates. However, this function of neuropeptides has not been characterized in crustaceans. Short neuropeptide F (sNPF), a highly conserved invertebrate neuropeptide, has been reported to be involved in feeding, metabolism, and in differentiation processes including reproduction. Although sNPF and its receptor (sNPFR) have been detected in the ovary in different species, ovarian colocalization of sNPF/sNPFR has not been investigated. In this study, we identified Scylla paramamosain (mud crab) sNPF (Sp-sNPF) as an endogenous ligand for the S. paramamosain orphan G protein-coupled receptor NPY2R in mammalian cell line HEK293T. We designated this receptor as Sp-sNPFR. RNA in situ hybridization in pre-vitellogenic ovary and reverse transcription-PCR on isolated denuded oocytes and follicle layers showed that Sp-sNPF was exclusively localized to the follicle cells, whereas Sp-sNPFR was detected in both follicle cells and oocytes. We also found that Sp-sNPF partly suppressed spontaneous maturation of denuded oocytes and caused intracellular cAMP accumulation and Ca2+ mobilization. Moreover, injection of synthetic Sp-sNPF peptides inhibited the expression of vitellogenin and vitellogenin receptor genes in vivo. These combined results suggest for the first time that Sp-sNPF may have inhibitory functions in vitellogenesis and oocyte maturation possibly via the autocrine/paracrine pathway.
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Affiliation(s)
- Chenchang Bao
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Yanan Yang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Huiyang Huang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Haihui Ye
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
- Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, Xiamen, China
- *Correspondence: Haihui Ye
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41
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Walencik PK, Stokowa-Sołtys K, Wieczorek R, Komarnicka UK, Kyzioł A, Jeżowska-Bojczuk M. Impact of the Cu(II) ions on the chemical and biological properties of goserelin – coordination pattern, DNA degradation, oxidative reactivity and in vitro cytotoxicity. J Inorg Biochem 2017; 175:167-178. [DOI: 10.1016/j.jinorgbio.2017.07.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 07/12/2017] [Accepted: 07/16/2017] [Indexed: 10/19/2022]
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42
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Kaya D, Gram A, Kowalewski MP, Schäfer-Somi S, Kuru M, Boos A, Aslan S. Expression of GnRH receptor in the canine corpus luteum, and luteal function following deslorelin acetate-induced puberty delay. Reprod Domest Anim 2017; 52:1104-1112. [PMID: 28963736 DOI: 10.1111/rda.13038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 06/24/2017] [Indexed: 11/28/2022]
Abstract
The goals of this study were as follows: (Experiment 1) to examine the basic capability of canine corpora lutea (CL) to respond to GnRH by assessing expression of gonadotropin-releasing hormone receptor (GnRH-R) in luteal samples collected throughout the luteal lifespan from non-pregnant dogs, and (Experiment 2) to investigate the effects of pre-pubertal application of the GnRH agonist deslorelin acetate on luteal function following the first oestrus. Mature CL were collected during the mid-luteal phase (days 30-45) from treated and control bitches. Transcript levels of several factors were determined: estrogen receptors (ESR1/ERα, ESR2/ERβ), progesterone (P4)-receptor (PGR), prolactin receptor (PRLR), PGE2-synthase (PTGES) and PGE2 receptors (PTGER2/EP2, PTGER4/EP4), vascular endothelial growth factor (VEGFA) and VEGF receptors (VEGFR1 and VEGFR2), cyclooxygenase 2 (COX2/PTGS2), steroidogenic acute regulatory protein (STAR) and 3β-hydroxysteroid dehydrogenase (3βHSD). Additionally, levels of Kisspeptin 1 (Kiss1) and its receptor (KISS1-R) were evaluated. Although generally low, GnRH-R expression was time dependent and was elevated during early dioestrus, with a significant decrease towards luteal regression. In deslorelin-treated and control dogs, its expression was either low or frequently below the detection limit. EP2 and VEGFR1 were higher in the treated group, which could be caused by a feedback mechanism after long-term suppression of reproductive activity. Despite large individual variations, 3βHSD was higher in the deslorelin-treated group. This, along with unchanged STAR expression, was apparently not mirrored in increased luteal functionality, because similar P4 levels were detected in both groups. Finally, the deslorelin-mediated long-term delay of puberty does not have negative carry-over effects on subsequent ovarian functionality in bitches.
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Affiliation(s)
- D Kaya
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, University of Kafkas, Kars, Turkey
| | - A Gram
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich, Zurich, Switzerland
| | - M P Kowalewski
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich, Zurich, Switzerland
| | - S Schäfer-Somi
- Platform for Artificial Insemination and Embryo Transfer, Vetmeduni Vienna, Vienna, Austria
| | - M Kuru
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, University of Kafkas, Kars, Turkey
| | - A Boos
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich, Zurich, Switzerland
| | - S Aslan
- Department of Obstetrics and Gynecology, Veterinary Faculty, Near East University, Nicosia, North Cyprus, Turkey
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Chen WY, Du YQ, Guan X, Zhang HY, Liu T. Effect of GnRHR polymorphisms on in vitro fertilization and embryo transfer in patients with polycystic ovary syndrome. J Hum Genet 2017; 62:1065-1071. [DOI: 10.1038/jhg.2017.85] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 07/25/2017] [Accepted: 07/26/2017] [Indexed: 11/09/2022]
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Oyola MG, Handa RJ. Hypothalamic-pituitary-adrenal and hypothalamic-pituitary-gonadal axes: sex differences in regulation of stress responsivity. Stress 2017; 20:476-494. [PMID: 28859530 PMCID: PMC5815295 DOI: 10.1080/10253890.2017.1369523] [Citation(s) in RCA: 355] [Impact Index Per Article: 50.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Gonadal hormones play a key role in the establishment, activation, and regulation of the hypothalamic-pituitary-adrenal (HPA) axis. By influencing the response and sensitivity to releasing factors, neurotransmitters, and hormones, gonadal steroids help orchestrate the gain of the HPA axis to fine-tune the levels of stress hormones in the general circulation. From early life to adulthood, gonadal steroids can differentially affect the HPA axis, resulting in sex differences in the responsivity of this axis. The HPA axis influences many physiological functions making an organism's response to changes in the environment appropriate for its reproductive status. Although the acute HPA response to stressors is a beneficial response, constant activation of this circuitry by chronic or traumatic stressful episodes may lead to a dysregulation of the HPA axis and cause pathology. Compared to males, female mice and rats show a more robust HPA axis response, as a result of circulating estradiol levels which elevate stress hormone levels during non-threatening situations, and during and after stressors. Fluctuating levels of gonadal steroids in females across the estrous cycle are a major factor contributing to sex differences in the robustness of HPA activity in females compared to males. Moreover, gonadal steroids may also contribute to epigenetic and organizational influences on the HPA axis even before puberty. Correspondingly, crosstalk between the hypothalamic-pituitary-gonadal (HPG) and HPA axes could lead to abnormalities of stress responses. In humans, a dysregulated stress response is one of the most common symptoms seen across many neuropsychiatric disorders, and as a result, such interactions may exacerbate peripheral pathologies. In this review, we discuss the HPA and HPG axes and review how gonadal steroids interact with the HPA axis to regulate the stress circuitry during all stages in life.
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Affiliation(s)
- Mario G Oyola
- a Department of Biomedical Sciences , Colorado State University , Fort Collins , CO , USA
| | - Robert J Handa
- a Department of Biomedical Sciences , Colorado State University , Fort Collins , CO , USA
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Lin PY, Huang FJ, Kung FT, Lin YC, Chiang HJ, Lin YJ, Lan KC. Reassessing the feasibility of the zygote score for predicting embryo viability in IVF/ICSI using the GnRH antagonist protocol compared to the long protocol. PLoS One 2017; 12:e0171465. [PMID: 28152037 PMCID: PMC5289632 DOI: 10.1371/journal.pone.0171465] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/03/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Many factors from the oocyte/sperm or the process of fertilization may affect the zygote formation. The zygote score (Z-score) describes the quality of a human zygote based on its pronuclear morphology, nucleolar precursor bodies, and alignment of polar bodies, and it can be used in the selection process at the zygote stage for embryo transfer or cryopreservation. OBJECTIVE The aim of this retrospective cohort study was to investigate the relationship between different controlled ovarian stimulation (COS) protocols and the zygote score (Z-score) and to assess the feasibility of the Z-score for predicting embryo survival in the GnRH-antagonist (GnRH-ant) protocol. METHODS It is a retrospective, single-center cohort study. A total of 3,826 zygotes with normal fertilization were analyzed from 744 in vitro fertilization /intra-cytoplasmic sperm injection (IVF/ICSI) cycles (long protocol n = 392; GnRH-ant n = 352) between Jan 2010 and April 2014 in the IVF unit of Chang-Gung Memorial Hospital Kaohsiung Medical Center. RESULTS The Z-score distribution differed significantly between these two protocols. The overall Z-score was poorer for zygotes from GnRH-ant cycles (p<0.05). Univariate and multivariate analyses indicated the type of COS protocol is one of the main determinants of Z-score grading. Our study found good-quality day 3 embryo/blastocyst formation and the cumulative embryo survival rate were correlated with the Z-score but not the COS protocol. With the GnRH-ant protocol, the number of Z1 in the transferred cohort embryos was significantly correlated with the clinical pregnancy rate (r = 0.976; p = 0.024) and live birth rate (r = 0.971; p = 0.029). This correlation was not seen with the long protocol. CONCLUSIONS The Z-score distribution for the GnRH antagonist cycles was poorer than that of the long protocol, but the Z-score system is a valuable parameter for predicting embryo viability in the GnRH-ant protocol, providing a strong correlation with the clinical pregnancy rate and live birth rate.
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Affiliation(s)
- Pin-Yao Lin
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Kaohsiung, Taiwan
| | - Fu-Jen Huang
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Fu-Tsai Kung
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yi-Chi Lin
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Hsin-Ju Chiang
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yu-Ju Lin
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Kuo-Chung Lan
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
- * E-mail:
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Karampelas T, Skavatsou E, Argyros O, Fokas D, Tamvakopoulos C. Gemcitabine Based Peptide Conjugate with Improved Metabolic Properties and Dual Mode of Efficacy. Mol Pharm 2017; 14:674-685. [PMID: 28099809 DOI: 10.1021/acs.molpharmaceut.6b00961] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gemcitabine is a clinically established anticancer agent potent in various solid tumors but limited by its rapid metabolic inactivation and off-target toxicity. We have previously generated a metabolically superior to gemcitabine molecule (GSG) by conjugating gemcitabine to a gonadotropin releasing hormone receptor (GnRH-R) ligand peptide and showed that GSG was efficacious in a castration resistant prostate cancer (CRPC) animal model. The current article provides an in-depth metabolic and mechanistic study of GSG, coupled with toxicity assays that strengthen the potential role of GSG in the clinic. LC-MS/MS based approaches were employed to delineate the metabolism of GSG, its mechanistic cellular uptake, and release of gemcitabine and to quantitate the intracellular levels of gemcitabine and its metabolites (active dFdCTP and inactive dFdU) resulting from GSG. The GnRH-R agonistic potential of GSG was investigated by quantifying the testosterone levels in animals dosed daily with GSG, while an in vitro colony forming assay together with in vivo whole blood measurements were performed to elucidate the hematotoxicity profile of GSG. Stability showed that the major metabolite of GSG is a more stable nonapeptide that could prolong gemcitabine's bioavailability. GSG acted as a prodrug and offered a metabolic advantage compared to gemcitabine by generating higher and steadier levels of dFdCTP/dFdU ratio, while intracellular release of gemcitabine from GSG in DU145 CRPC cells depended on nucleoside transporters. Daily administrations in mice showed that GSG is a potent GnRH-R agonist that can also cause testosterone ablation without any observed hematotoxicity. In summary, GSG could offer a powerful and unique pharmacological approach to prostate cancer treatment: a single nontoxic molecule that can be used to reach the tumor site selectively with superior to gemcitabine metabolism, biodistribution, and safety while also agonistically ablating testosterone levels.
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Affiliation(s)
- Theodoros Karampelas
- Division of Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens , 4 Soranou Ephessiou Street, 11527 Athens, Greece
| | - Eleni Skavatsou
- Division of Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens , 4 Soranou Ephessiou Street, 11527 Athens, Greece
| | - Orestis Argyros
- Division of Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens , 4 Soranou Ephessiou Street, 11527 Athens, Greece
| | - Demosthenes Fokas
- Laboratory of Medicinal Chemistry, Department of Materials Science and Engineering, University of Ioannina , 45110 Ioannina, Greece
| | - Constantin Tamvakopoulos
- Division of Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens , 4 Soranou Ephessiou Street, 11527 Athens, Greece
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Chitosan-based DNA delivery vector targeted to gonadotropin-releasing hormone (GnRH) receptor. Carbohydr Polym 2017; 157:311-320. [DOI: 10.1016/j.carbpol.2016.09.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/30/2016] [Accepted: 09/05/2016] [Indexed: 11/23/2022]
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48
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Brito L, Baldrighi J, Wolf C, Ginther O. Effect of GnRH and hCG on progesterone concentration and ovarian and luteal blood flow in diestrous mares. Anim Reprod Sci 2017; 176:64-69. [DOI: 10.1016/j.anireprosci.2016.11.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/20/2016] [Accepted: 11/21/2016] [Indexed: 10/20/2022]
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Segner H, Verburg-van Kemenade BML, Chadzinska M. The immunomodulatory role of the hypothalamus-pituitary-gonad axis: Proximate mechanism for reproduction-immune trade offs? DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2017; 66:43-60. [PMID: 27404794 DOI: 10.1016/j.dci.2016.07.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/06/2016] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
The present review discusses the communication between the hypothalamic-pituitary-gonad (HPG) axis and the immune system of vertebrates, attempting to situate the HPG-immune interaction into the context of life history trade-offs between reproductive and immune functions. More specifically, (i) we review molecular and cellular interactions between hormones of the HPG axis, and, as far as known, the involved mechanisms on immune functions, (ii) we evaluate whether the HPG-immune crosstalk serves as proximate mechanism mediating reproductive-immune trade-offs, and (iii) we ask whether the nature of the HPG-immune interaction is conserved throughout vertebrate evolution, despite the changes in immune functions, reproductive modes, and life histories. In all vertebrate classes studied so far, HPG hormones have immunomodulatory functions, and indications exist that they contribute to reproduction-immunity resource trade-offs, although the very limited information available for most non-mammalian vertebrates makes it difficult to judge how comparable or different the interactions are. There is good evidence that the HPG-immune crosstalk is part of the proximate mechanisms underlying the reproductive-immune trade-offs of vertebrates, but it is only one factor in a complex network of factors and processes. The fact that the HPG-immune interaction is flexible and can adapt to the functional and physiological requirements of specific life histories. Moreover, the assumption of a relatively fixed pattern of HPG influence on immune functions, with, for example, androgens always leading to immunosuppression and estrogens always being immunoprotective, is probably oversimplified, but the HPG-immune interaction can vary depending on the physiological and envoironmental context. Finally, the HPG-immune interaction is not only driven by resource trade-offs, but additional factors such as, for instance, the evolution of viviparity shape this neuroendocrine-immune relationship.
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Affiliation(s)
- Helmut Segner
- Centre for Fish and Wildlife Health, Dept of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, P.O. Box, CH-3001, Bern, Switzerland.
| | - B M Lidy Verburg-van Kemenade
- Cell Biology and Immunology Group, Dept. of Animal Sciences, Wageningen University, P.O. Box 338, 6700 AH, Wageningen, The Netherlands
| | - Magdalena Chadzinska
- Department of Evolutionary Immunology, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387, Krakow, Poland
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Establishment of an mKate2-Expressing Cell Line for Non-Invasive Real-Time Breast Cancer In Vivo Imaging. Mol Imaging Biol 2016; 17:811-8. [PMID: 25902968 DOI: 10.1007/s11307-015-0853-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE Non-invasive real-time in vivo imaging experiments using mice as animal models have become crucial for understanding cancer development and treatment. In this study, we have developed and validated a new breast cancer cell line MDA-MB-435s that stably express a far-red fluorescence protein (mKate2) and that could serve as a highly valuable cell model for studying breast cancer detection and therapy using in vivo fluorescence imaging in nude mice. PROCEDURES The new cell line (MDA-MB-435s-mKate2) was constructed by plasmid transfection. The stability and sensitivity of mKate2, and the cell biological activities, were tested in vitro using different experimental approaches. For its potential use in tumor growth research and drug therapy in vivo, MDA-MB-435s-mKate2 was validated using the immunocompromised Balb/c nude mice tumor model. In addition, the new cell line has been characterized as a luteinizing hormone-releasing hormone receptor (LHRHR) positive cell line. RESULTS Firstly, MDA-MB-435s-mKate2 has shown a stable chromosomal integration of the amplified mKate2 gene and good fluorescence sensitivity for detection using a fluorescence reflectance imaging (FRI) device. Compared to its parental cell line, no significant difference in cell migration, proliferation, and clone formation was observed in vitro. Secondly, using the quantification of tumor-fluorescence surface area in live animals, we were able to monitor and detect the tumor progress or tumor inhibition rate (by Paclitaxel treatment) non-invasively and in real-time. Furthermore, MDA-MB-435s-mKate2 has been positively tested for LHRHR; these findings open the possibility to use this cell line for future studies of breast cancer therapy based on LHRH analogs in vivo. CONCLUSION In the present research, we have successfully built the MDA-MB-435s-mKate2 cell line that can be used as a suitable cell model for breast cancer therapy and anti-cancer drug evaluation by non-invasive fluorescence imaging in mice.
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