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Gu T, Wang G, van den Oord EJC, Goldman E, Yang C, Xie N, Yao L, Wang CY, Jablonski M, Ray K, Liu F, Pan W, Flores G, Aleya L, Meng X, Jiao Y, Li M, Wang Y, Gu W. A Perspective on Evaluating Life Stage Differences in Drug Dosages for Drug Labeling and Instructions. AAPS J 2024; 26:95. [PMID: 39164430 DOI: 10.1208/s12248-024-00964-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 07/27/2024] [Indexed: 08/22/2024] Open
Abstract
Drug labeling and instructions provide essential information for patients regarding the usage of drugs. Instructions for the dosage of drug usage are critical for the effectiveness of the drug and the safety of patients. The dosage of many drugs varies depending on the patient's age. However, as our understanding of human biology deepens, we believe that these instructions need to be modified to incorporate different life stages. This is because human biology and metabolism differ significantly among different life stages, and their responses to drugs also vary. Additionally, the same age of different persons may fall into different life stages. Therefore, our group from multiple institutes and countries proposes a reexamination of whether incorporating life stages in all or any drug instructions will greatly enhance drug efficiency and patients' health.
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Affiliation(s)
- Tianshu Gu
- Department of Clinical Pharmacy and Translational Science, University of Tennessee Health Science Center, Memphis, Tennesse, 38103, USA
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, PR China
| | - Guiying Wang
- General Surgery, The 2nd Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, Hebei, China
| | - Edwin J C van den Oord
- Center for Biomarker Research and Precision Medicine (BPM), Virginia Commonwealth University, VCU Health Sciences Research Building, Room 216A, P. O. Box 980533, Richmond, Virgina, 23298-0581, USA
| | - Emanuel Goldman
- Department of Microbiology, Biochemistry and Molecular Genetics, New Jersey Medical School, Rutgers University, Newark, New Jersey, 07103, USA
| | - Chengyuan Yang
- Department of Orthopedic Surgery and BME-Campbell Clinic, University of Tennessee Health Science Centre, Memphis, Tennesse, 38163, USA
| | - Ning Xie
- College of Business, University of Louisville, Louisville, Kentucky, 40292, USA
| | - Lan Yao
- Department of Orthopedic Surgery and BME-Campbell Clinic, University of Tennessee Health Science Centre, Memphis, Tennesse, 38163, USA
- College of Health Management, Harbin Medical University, 157 Baojian Road, Harbin, 150081, Heilongjiang, China
| | - Cong-Yi Wang
- The Centre for Biomedical Research, Department of Respiratory and Critical Care Medicine, NHC Key Laboratory of Respiratory Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Monica Jablonski
- Department of Ophthalmology, University of Tennessee Health Sciences Center, Memphis, Tennesse, USA
- Department of Medicine, University of Tennessee Health Sciences Center, Memphis, Tennesse, USA
- Hamilton Eye Institute, University of Tennessee Health Sciences Center, Memphis, Tennesse, USA
- College of Nursing, University of Tennessee Health Science Center, Memphis, Tennesse, 38105, USA
| | - Kunal Ray
- School of Biological Science, Ramkrishna Mission Vivekananda Education & Research Institute, Narendrapur, 700103, West Bengal, India
| | - Fengxia Liu
- Research Center, The Fourth Hospital of Hebei Medical University, 12 Jiankang Road, Shijiazhuang, 050011, China
| | - Wensen Pan
- Respiratory Medicine and Intensive Care, The 2, Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, Hebei, China
| | - Gonzalo Flores
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla, 14 Sur 6301, San Manuel, 72570, Puebla, Mexico
| | - Lotfi Aleya
- Chrono-Environnement Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, 25030, Besançon Cedex, France
| | - Xia Meng
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, PR China
| | - Yan Jiao
- Department of Orthopedic Surgery and BME-Campbell Clinic, University of Tennessee Health Science Centre, Memphis, Tennesse, 38163, USA
| | - Minghui Li
- Department of Clinical Pharmacy and Translational Science, University of Tennessee Health Science Center, Memphis, Tennesse, 38103, USA.
- , Memphis, USA.
| | - Yongjun Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, PR China.
- Department of Neurology and Department of Clinical Trial Center, Beijing Tiantan Hospital, Capital Medical University, No.119 South Fourth Ring West Road, Fengtai District, Beijing, 100070, China.
| | - Weikuan Gu
- Department of Orthopedic Surgery and BME-Campbell Clinic, University of Tennessee Health Science Centre, Memphis, Tennesse, 38163, USA.
- Lt. Col. Luke Weathers, Jr. VA Medical Center, 116 N Pauline St., Memphis, Tennesse, 38105, USA.
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 956 Court Avenue, Memphis, Tennesse, 38163, USA.
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Delgadillo JA, Espinoza-Flores LA, Abecia JA, Hernández H, Keller M, Chemineau P. Sexually active male goats stimulate the endocrine and sexual activities of other males in seasonal sexual rest through the "buck-to-buck effect". Domest Anim Endocrinol 2022; 81:106746. [PMID: 35750019 DOI: 10.1016/j.domaniend.2022.106746] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 11/28/2022]
Abstract
Male goats rendered sexually active by exposure to a photoperiodic treatment are more efficient than untreated goats in stimulating LH secretion and ovulation in seasonally anestrous goats. This phenomenon is called the "male effect." Here, we determined whether sexually active bucks are able to stimulate the endocrine and sexual activities of other bucks in seasonal sexual rest through the phenomenon that we called the "buck-to-buck effect." We used bucks rendered sexually active (SA) during sexual rest by exposure to 2.5 mo of artificial long days (16 h of light per d) and untreated, sexually inactive (SI) bucks. In Experiment 1, we determined the short-term (21 d) LH and testosterone responses of sexually inactive bucks joined with a SA or SI buck. In Experiment 2, we determined the long-term (60 d) testosterone and sexual behavior responses of sexually inactive bucks joined with 2 SA or SI bucks. In Experiment 3, we determined the efficacy of bucks initially exposed to the buck-to-buck effect, the SABB bucks, to thereafter induce a "classical" male effect in seasonally anestrous goats. In Experiments 1 and 2, there was an interaction between time and groups in LH and testosterone plasma concentrations (P < 0.01). In Experiment 1, plasma LH concentrations were greater in bucks joined with a SA buck than in those joined with an SI buck (P < 0.05). In Experiments 1 and 2, testosterone concentrations were greater in bucks joined with SA bucks than in those joined with SI bucks (P < 0.05). In addition, in Experiment 2, the sexually inactive bucks joined with SA bucks displayed more nudging than those joined with SI bucks (P < 0.001). In Experiment 3, kidding rates did not differ between females joined with SA (34 of 40: 85%) or SABB bucks (32 of 40: 80%; P > 0.05). We concluded that the endocrine and sexual activities of bucks during sexual rest can be stimulated by SA bucks. In addition, SABB bucks are able to stimulate the reproductive activity of seasonally anestrous goats.
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Affiliation(s)
- J A Delgadillo
- Centro de Investigación en Reproducción Caprina (CIRCA), Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico.
| | - L A Espinoza-Flores
- Centro de Investigación en Reproducción Caprina (CIRCA), Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
| | - J A Abecia
- Departamento de Producción Animal y Ciencia de los Alimentos, IUCA, Universidad de Zaragoza, Zaragoza, Spain
| | - H Hernández
- Centro de Investigación en Reproducción Caprina (CIRCA), Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
| | - M Keller
- UMR Physiologie de la Reproduction et des Comportements, INRAE, CNRS, IFCE, Université de Tours, Agreenium, 37380 Nouzilly, France
| | - P Chemineau
- UMR Physiologie de la Reproduction et des Comportements, INRAE, CNRS, IFCE, Université de Tours, Agreenium, 37380 Nouzilly, France
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Exogenous gonadotropin-releasing hormone counteracts the adverse effect of scrotal insulation on testicular functions in bucks. Sci Rep 2022; 12:7869. [PMID: 35551262 PMCID: PMC9098548 DOI: 10.1038/s41598-022-11884-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 04/29/2022] [Indexed: 11/08/2022] Open
Abstract
This study determined the effects of scrotal insulation on testicular functions in bucks and evaluated the impact of exogenous gonadotropin-releasing hormone (GnRH) administration before scrotal insulation on sperm production and testicular vascular dynamics. Twelve bucks were randomly divided into three groups: scrotal-insulated animals without GnRH treatment (INS), scrotal-insulated animals treated previously with GnRH (GnRH + INS), and animals without insulation as controls (CON). Doppler ultrasonography was used to evaluate testicular vascular changes, and semen samples were collected to assess seminal parameters. Testicular samples were collected from slaughtered bucks at the end of the experiment for histological investigations and immunohistochemical analysis for caspase 3 (apoptotic marker), and a vascular endothelial growth factor (VEGF; hypoxic marker) evaluation. Sperm motility drastically decreased (33%) in the INS group on day 8 compared with those in the GnRH + INS and CON groups (58% and 85%, respectively). Testicular blood flow significantly decreased for 3 and 2 weeks in the INS and GnRH + INS groups, respectively. The pulsatility index (PI) reached pretreatment values at 5 and 4 weeks after insulation in the INS and GnRH + INS groups, respectively. The resistance index (RI) values increased in both insulated groups for the first 2 weeks and decreased to control values 4 weeks after insulation. However, the maximum velocity (VP) started to increase reaching pretreatment values by the 5th and 3rd weeks after insulation in the INS and GnRH + INS groups, respectively. Histological investigations showed a marked reduction in lipid inclusions in Sertoli cells in the GnRH + INS group compared with those in the INS group. The distributions of both caspase 3 and VEGF decreased in the GnRH + INS group compared with those in the INS group. This study showed that the administration of a single dose of GnRH delayed the negative effects of scrotal insulation on different seminal traits and revealed the pivotal role of GnRH in compensating testicular insulation in bucks.
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Ikegami K, Watanabe Y, Nakamura S, Goto T, Inoue N, Uenoyama Y, Tsukamura H. Cellular and molecular mechanisms regulating the KNDy neuronal activities to generate and modulate GnRH pulse in mammals. Front Neuroendocrinol 2022; 64:100968. [PMID: 34808231 DOI: 10.1016/j.yfrne.2021.100968] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/18/2021] [Accepted: 11/15/2021] [Indexed: 12/30/2022]
Abstract
Accumulating findings during the past decades have demonstrated that the hypothalamic arcuate kisspeptin neurons are supposed to be responsible for pulsatile release of gonadotropin-releasing hormone (GnRH) to regulate gametogenesis and steroidogenesis in mammals. The arcuate kisspeptin neurons express neurokinin B (NKB) and dynorphin A (Dyn), thus, the neurons are also referred to as KNDy neurons. In the present article, we mainly focus on the cellular and molecular mechanisms underlying GnRH pulse generation, that is focused on the action of NKB and Dyn and an interaction between KNDy neurons and astrocytes to control GnRH pulse generation. Then, we also discuss the factors that modulate the activity of KNDy neurons and consequent pulsatile GnRH/LH release in mammals.
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Affiliation(s)
- Kana Ikegami
- Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Youki Watanabe
- Graduate School of Applied Life Science, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
| | - Sho Nakamura
- Faculty of Veterinary Medicine, Okayama University of Science, Imabari, Ehime 794-8555, Japan
| | - Teppei Goto
- RIKEN Center for Biosystems Dynamics Research, Hyogo 650-0047, Japan
| | - Naoko Inoue
- Graduate School of Bioagricultural Science, Nagoya University, Nagoya 464-8601, Japan
| | - Yoshihisa Uenoyama
- Graduate School of Bioagricultural Science, Nagoya University, Nagoya 464-8601, Japan
| | - Hiroko Tsukamura
- Graduate School of Bioagricultural Science, Nagoya University, Nagoya 464-8601, Japan.
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Fatima I, Qureshi IZ. Intraperitoneal kisspeptin-10 administration ameliorates sodium arsenite-induced reproductive toxicity in adult male mice. Andrologia 2021; 54:e14347. [PMID: 34897760 DOI: 10.1111/and.14347] [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: 09/17/2021] [Revised: 11/15/2021] [Accepted: 11/24/2021] [Indexed: 11/28/2022] Open
Abstract
The current study investigated the protective ameliorative effect of intraperitoneally administered kisspeptin-10 (50 nmol/day) against reproductive toxicity in adult male mice challenged with 35 days of exposure to sodium arsenite in drinking water. Mice were divided into tap water control, sodium arsenite-alone (4 ppm and 10 ppm), kisspeptin-alone (intermittent and continuous) and combined (sodium arsenite +kisspeptin-10 intermittent and continuous) treatment groups. Results revealed protective effect of both intermittent and continuous kisspeptin doses on reproductive organs against sodium arsenite-induced toxicity. This was indicated by an increase (p < 0.001) in the activity of antioxidant enzymes and a decrease (p < 0.001) in the levels of oxidative stress biomarkers. Concomitant significant increase was noticeable in the relative organ weight (p < 0.01), and serum testosterone and seminal fructose (p < 0.001), and a significant improvement in sperm parameters was also observed. A significant downregulation of lactate dehydrogenase concentration demonstrated further the protective effect of kisspeptin against tissue damage. Histologically, both treatment regimens of kisspeptin combined with sodium arsenite exposure prevented massive germ cell loss and tissue damage, a condition prominent in sodium arsenite-alone-treated mice. The study demonstrates for the first time kisspeptin's potential to mitigate the biochemical and histotoxic effects of arsenic on male reproductive system.
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Affiliation(s)
- Iffat Fatima
- Department of Zoology (Animal Sciences), Quaid-i-Azam University, Islamabad, Pakistan
| | - Irfan Zia Qureshi
- Department of Zoology (Animal Sciences), Quaid-i-Azam University, Islamabad, Pakistan
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Beltramo M, Robert V, Decourt C. The kisspeptin system in domestic animals: what we know and what we still need to understand of its role in reproduction. Domest Anim Endocrinol 2020; 73:106466. [PMID: 32247617 DOI: 10.1016/j.domaniend.2020.106466] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/10/2020] [Accepted: 02/26/2020] [Indexed: 02/05/2023]
Abstract
The discovery of the kisspeptin (Kp) system stirred a burst of research in the field of reproductive neuroendocrinology. In the last 15 yr, the organization and activity of the system, including its neuroanatomical structure, its major physiological functions, and its main pharmacological properties, were outlined. To this endeavor, the use of genetic tools to delete and to restore Kp system functionality in a specific tissue was essential. At present, there is no question as to the key role of the Kp system in mammalian reproduction. However, easily applicable genetic manipulations are unavailable for domestic animals. Hence, many essential details on the physiological mechanisms underlying its action on domestic animals require further investigation. The potentially different effects of the various Kp isoforms, the precise anatomical localization of the Kp receptor, and the respective role played by the 2 main populations of Kp cells in different species are only few of the questions that remain unanswered and that will be illustrated in this review. Furthermore, the application of synthetic pharmacologic tools to manipulate the Kp system is still in its infancy but has produced some interesting results, suggesting the possibility of developing new methods to manage reproduction in domestic animals. In spite of a decade and a half of intense research effort, much work is still required to achieve a comprehensive understanding of the influence of the Kp system on reproduction. Furthermore, Kp system ramifications in other physiological functions are emerging and open new research perspectives.
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Affiliation(s)
- M Beltramo
- INRAE (CNRS, UMR7247, Université de Tours, IFCE), UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.
| | - V Robert
- INRAE (CNRS, UMR7247, Université de Tours, IFCE), UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
| | - C Decourt
- INRAE (CNRS, UMR7247, Université de Tours, IFCE), UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
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El-Sherry TM, Abdel-Ghani MA, Mahmoud GB, Ezzat AA. Kisspeptin injection improved the semen characteristics and sperm rheotaxis in Ossimi ram. Reprod Domest Anim 2020; 55:240-247. [PMID: 31880370 DOI: 10.1111/rda.13613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 12/08/2019] [Indexed: 11/30/2022]
Abstract
The aim of the present study was to investigate the effect of kisspeptin-10 (Kp10) injection on semen characteristics, testosterone (T) production and sperm rheotaxis using microfluidic devices in immature ram. Computer-assisted sperm analysis (CASA) with controlled flow velocity was used to explore the kinetic parameters of sperm and positive rheotaxis (PR %). PR % was defined as the number of PR sperms over the number of motile sperms. Healthy Ossimi rams were randomly divided into two groups; a saline-treated control group and Kp10-treated one (5 µg/kg body weight). Treatments were given by intramuscular injection once a week for 1 month. After 1 month, the semen was collected and evaluated weekly for 6 weeks, while the blood samples were collected every 2 weeks for the next 8 weeks. Semen properties were significantly affected by Kp10 injection (p < .01). The Kp10 increased the volume, sperm concentration and percentages of live sperm compared with those of control. Additionally, sperm trajectories and rheotaxis get improved by the injection of Kp10 with time. Furthermore, kisspeptin improved the secretion of testosterone levels throughout the period of study. In conclusion, injections of the Kp10 had a positive impact on semen characteristics as well as improved sperm rheotaxis of Ossimi rams in subtropics.
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Affiliation(s)
- Timor M El-Sherry
- Department of Theriogenology, Faculty of Veterinary Medicine, Assuit University, Assuit, Egypt
| | - Mohammed A Abdel-Ghani
- Department of Theriogenology, Faculty of Veterinary Medicine, Assuit University, Assuit, Egypt
| | - Gamal B Mahmoud
- Department of Animal Production, Faculty of Agriculture, Assiut University, Assuit, Egypt
| | - Ahmed A Ezzat
- Department of Biology, College of Science, King Khalid Unversity, Abha, Saudi Arabia.,Department of Theriogenology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
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Northup SL, Coffman EA, Strickland LG, Pohler KG, Daniel JA, Whitlock BK. Intravenous infusion of kisspeptin increased serum luteinizing hormone acutely and decreased serum follicle stimulating hormone chronically in prepubertal bull calves. Theriogenology 2019; 144:1-7. [PMID: 31881476 DOI: 10.1016/j.theriogenology.2019.12.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/15/2019] [Accepted: 12/19/2019] [Indexed: 12/01/2022]
Abstract
Kisspeptin (KP) is a hypothalamic neuropeptide that stimulates the secretion of gonadotropin releasing hormone. To determine the acute and chronic effects of KP on serum concentrations of luteinizing hormone (LH) and follicle stimulating hormone (FSH), prepubertal bull calves [12 ± 1 (SD) weeks of age; 96.5 ± 14.5 kg BW] were administered one of four treatments [0.0 (control; CON), 0.125 (L-KP), 0.25 (M-KP), or 0.5 (H-KP) μg of KP/kg BW/hour] by intravenous infusion for 76 h. Blood samples were collected every 15 min for the first (acute; 1-6 h; Day 1) and last (chronic; 71-76 h; Day 4) 6 h of the intravenous infusions. Serum concentrations of LH and FSH were determined by radioimmunoassay. For each day, effects of treatment, time, and interactions on LH and FSH concentrations and pulse parameters were analyzed using procedures for repeated measures with JMP Software (SAS Inst. Inc., Cary, NC). There was a treatment effect (P = 0.002) and a treatment × time interaction during Day 1 (P = 0.02) such that LH concentrations were greatest following administration of all doses of KP when compared to CON. However, there was no treatment effect (P = 0.57) or a treatment × time interaction during Day 4 (P = 0.20) on serum LH concentrations. There was a treatment by day interaction (P = 0.02) on mean serum FSH concentrations. Most notably, on Day 4 mean serum FSH concentrations during intravenous infusion of M-KP and H-KP doses were less than that of CON. There was a treatment by day interaction (P = 0.0054) on FSH pulse amplitude concentrations, such that intravenous infusion of all doses of KP on Day 4 decreased FSH pulse amplitudes. In conclusion, acute infusion of KP increased LH concentrations and chronic infusion of KP decreased FSH concentrations. Despite the potential suppression of the hypothalamic-pituitary-gonadal axis with chronic infusion of KP, there are likely applications of KP, KP analogs, or KP receptor agonists to hasten the onset of puberty in livestock.
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Affiliation(s)
- Samantha L Northup
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA; Department of Animal Science, University of Tennessee, Knoxville, TN, USA
| | - Elizabeth A Coffman
- School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - Lew G Strickland
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA; Department of Animal Science, University of Tennessee, Knoxville, TN, USA
| | - Ky G Pohler
- Department of Animal Science, University of Tennessee, Knoxville, TN, USA
| | - Jay A Daniel
- School of Mathematical and Natural Sciences, Berry College, Mount Berry, GA, USA
| | - Brian K Whitlock
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA.
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Abou Khalil NS, Mahmoud GB. Reproductive, antioxidant and metabolic responses of Ossimi rams to kisspeptin. Theriogenology 2019; 142:414-420. [PMID: 31711707 DOI: 10.1016/j.theriogenology.2019.10.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 10/21/2019] [Accepted: 10/31/2019] [Indexed: 02/06/2023]
Abstract
The aim of this study was to evaluate the potential reproductive, antioxidant and metabolic effects of kisspeptin-10 (KP-10) on Ossimi rams. Twelve Ossimi rams (1.5-2 years old) were divided randomly into two groups (six per group). The first one served as a control group, while the second one served as a treated group. Rams of the treated group were injected once weekly with KP-10 (5 μg/kg body weight) for one month. There were no significant differences in all measured parameters between rams of control group at pre-treatment period and those at post-treatment period. However, most examined parameters in the same rams in the treated group were affected by injection of KP-10 when comparing pre-treatment values in treated group with its post-treatment values. At the pre-treatment period, there were no significant differences between the treated and control groups regarding semen pH, mass motility, sperm concentration/mL, live and dead spermatozoa, total sperm abnormality, testosterone and oxidative stress and metabolic parameters. However, all semen characteristics were significantly improved in the treated group compared with the control group at the post-treatment period and in the treated group at the post-treatment period compared with that at the pre-treatment period. In addition, scrotal circumference, ejaculate volume and total sperm concentration/ejaculate showed higher significant improvements when comparing the treated group with the control one at the post-treatment period than when comparing the two groups at the pre-treatment period and also when comparing the treated group at the post-treatment period with that at the pre-treatment period. Serum testosterone, total antioxidant capacity, lipid peroxides, nitric oxide, total protein, albumin, glucose and high density lipoprotein-cholesterol levels significantly increased when comparing the treated group with the control one at the post-treatment period and also when comparing the treated group at the post-treatment period with that at the pre-treatment period. In conclusion, KP-10 led to potential improvement in the reproductive efficacy and metabolic capacity of Ossimi ram.
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Affiliation(s)
- Nasser S Abou Khalil
- Department of Medical Physiology, Faculty of Medicine, Assiut University, Assiut, 71526, Egypt.
| | - Gamal B Mahmoud
- Department of Animal Production, Faculty of Agriculture, Assiut University, Assiut, 71526, Egypt.
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10
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Abdel-Ghani M, Mahmoud G. Effect of kisspeptin injection on reproductive performance of Ossimi rams in subtropics. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Parker PA, Coffman EA, Pohler KG, Daniel JA, Aucagne V, Beltramo M, Whitlock BK. Acute and subacute effects of a synthetic kisspeptin analog, C6, on serum concentrations of luteinizing hormone, follicle stimulating hormone, and testosterone in prepubertal bull calves. Theriogenology 2019; 130:111-119. [PMID: 30884331 DOI: 10.1016/j.theriogenology.2019.03.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 02/12/2019] [Accepted: 03/03/2019] [Indexed: 10/27/2022]
Abstract
Kisspeptin (KP) is a neuropeptide integral in regulating puberty and gonadotropin releasing hormone. Compound 6 (C6), a KP analog, is more potent in vitro, has a longer half-life, and may have greater therapeutic applications than KP. To determine the acute and subacute effects of KP and C6 on serum concentrations of luteinizing hormone (LH), follicle stimulating hormones (FSH), and testosterone (T), prepubertal bull calves [12.1 ± 1.1 (SD) weeks of age; 91.2 ± 10.8 kg BW] were assigned to one of three treatment groups [Saline (n = 4), KP (n = 4; 20 nmoles), or C6 (n = 4; 20 nmoles). Treatments were administered intramuscularly once daily for four consecutive days. Blood samples were collected every 15 min for 6 h immediately following treatment administration on Day 1 (acute) and Day 4 (subacute). Serum concentrations of LH, FSH, and T were determined by radioimmunoassay. For each day, effects of treatment, time, and interactions on LH and FSH concentrations and pulse parameters were analyzed using procedures for repeated measures with JMP Software (SAS Inst. Inc., Cary, NC). There was a treatment × time interaction during Day 1 (P < 0.0001) and Day 4 (P = 0.02) such that LH concentrations were greatest following administration of C6 (albeit diminished during Day 4). Number of LH pulses were least (P = 0.02) and LH nadirs were highest (P = 0.04) following administration of C6 (P = 0.02). There was no effect of treatment (P = 0.95) or treatment × time interaction (P = 0.10) on serum FSH concentrations during Day 1. During Day 4 FSH concentrations (P = 0.02) and number of FSH pulses (P = 0.02) were least following administration of C6. There was no effect of treatment (P = 0.33), time (P = 0.19) or treatment × time interaction (P = 0.44) on T concentrations. In conclusion, acute and subacute C6 increased LH concentrations and subacute C6 decreased FSH concentrations and pulse parameters. Despite suppression of FSH with subacute daily administration of C6, altered frequency and timing of treatment with KP analogs may have application to affect the onset of puberty in livestock.
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Affiliation(s)
- P A Parker
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA
| | - E A Coffman
- School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - K G Pohler
- Department of Animal Science, University of Tennessee, Knoxville, TN, USA
| | - J A Daniel
- School of Mathematical and Natural Sciences, Berry College, Mount Berry, GA, USA
| | - V Aucagne
- Centre de Biophysique Moléculaire, CNRS UPR4301, 45071, Orléans cedex 2, France
| | - M Beltramo
- UMR Physiologie de la Reproduction et des Comportements (INRA, UMR85; CNRS, UMR7247, Université de Tours, IFCE), 37380, Nouzilly, France
| | - B K Whitlock
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA.
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12
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Effect of kisspeptin antagonist on goat in vitro Leydig cell steroidogenesis. Theriogenology 2018; 121:134-140. [DOI: 10.1016/j.theriogenology.2018.07.038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/29/2018] [Accepted: 07/30/2018] [Indexed: 02/05/2023]
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13
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Scott CJ, Rose JL, Gunn AJ, McGrath BM. Kisspeptin and the regulation of the reproductive axis in domestic animals. J Endocrinol 2018; 240:JOE-18-0485.R1. [PMID: 30400056 DOI: 10.1530/joe-18-0485] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/09/2018] [Indexed: 11/08/2022]
Abstract
The control of reproductive processes involves the integration of a number of factors from the internal and external environment, with the final output signal of these processes being the pulsatile secretion of gonadotrophin releasing hormone (GnRH) from the hypothalamus. These factors include the feedback actions of sex steroids, feed intake and nutritional status, season/photoperiod, pheromones, age and stress. Understanding these factors and how they influence GnRH secretion and hence reproduction is important for the management of farm animals. There is evidence that the RF-amide neuropeptide, kisspeptin, may be involved in relaying the effects of these factors to the GnRH neurons. This paper will review the evidence from the common domestic animals (sheep, goats, cattle, horses and pigs), that kisspeptin neurons are i) regulated by the factors listed above, ii) contact GnRH neurons, and iii) involved in the regulation of GnRH/gonadotrophin secretion.
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Affiliation(s)
- Christopher J Scott
- C Scott, School of Biomedical Sciences, Charles Sturt University - Wagga Wagga Campus, Wagga Wagga, Australia
| | - Jessica L Rose
- J Rose, School of Biomedical Sciences, Charles Sturt University - Wagga Wagga Campus, Wagga Wagga, Australia
| | - Allan J Gunn
- A Gunn, School of Animal and Veterinary Sciences, Charles Sturt University - Wagga Wagga Campus, Wagga Wagga, Australia
| | - Briony M McGrath
- B McGrath, School of Biomedical Sciences, Charles Sturt University - Wagga Wagga Campus, Wagga Wagga, Australia
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14
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Effect of kisspeptin-10, LH and hCG on serum testosterone concentrations in stallions, donkeys and mules. Theriogenology 2017; 102:75-79. [DOI: 10.1016/j.theriogenology.2017.07.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 11/18/2022]
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15
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Beltramo M, Decourt C. Towards new strategies to manage livestock reproduction using kisspeptin analogs. Theriogenology 2017; 112:2-10. [PMID: 28916209 DOI: 10.1016/j.theriogenology.2017.08.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 08/29/2017] [Accepted: 08/30/2017] [Indexed: 12/16/2022]
Abstract
The discovery of the hypothalamic neuropeptide kisspeptin and its receptor (KISS1R) have dramatically improved our knowledge about the central mechanisms controlling reproduction. Kisspeptin neurons could be considered the hub where internal and external information controlling reproduction converge. The information is here elaborated and the command dispatched to GnRH neurons, the final output of the brain system controlling reproduction. Several studies have shown that in mammals administration of kisspeptin could finely modulate many aspects of reproduction from puberty to ovulation. For example in ewes kisspeptin infusion triggered ovulation during the non-breeding season and in prepubertal rat repeated injections advanced puberty onset. However, especially in livestock, the suboptimal pharmacological properties of endogenous kisspeptin, notably it short half-life and consequently its poor pharmacodynamics, fetters its use to experimental setting. To overcome this issue synthetic KISS1R agonists, mainly based on kisspeptin backbone, were created. Their more favorable pharmacological profile, longer half-life and duration of action, allowed to perform promising initial experiments for controlling ovulation and puberty. Additional experiments and further refinement of analogs would still be necessary to exploit fully the potential of targeting the kisspeptin system. Nevertheless, it is already clear that this new strategy may represent a breakthrough in the field of reproduction control.
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Affiliation(s)
- M Beltramo
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France; CNRS, UMR7247, F-37380 Nouzilly, France; Université François Rabelais de Tours, F-37041 Tours, France; IFCE, F-37380 Nouzilly, France.
| | - C Decourt
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France; CNRS, UMR7247, F-37380 Nouzilly, France; Université François Rabelais de Tours, F-37041 Tours, France; IFCE, F-37380 Nouzilly, France
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16
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KHAN MH, HAZARIKA SB, PERUMAL P, BARUAH KK, YASOTHA T, SINHA PAPIYA. Kiss 1 and GPR54 mRNA expression, endocrine profile, follicular development and onset of estrus following kisspeptin administration in pre-pubertal mithun heifers. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2017. [DOI: 10.56093/ijans.v87i4.69513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Present study was undertaken to find out the effect of exogenous kisspeptin administration on Kiss1 and GPR54 mRNA expression, plasma endocrine profile and follicular development in pre-pubertal mithun heifers. Mithun heifers (20), age between 22–26 months, were selected and divided randomly into two groups (n=10). Before starting the experiment, all animals were examined by rectal palpation as well as through ultrasonography to ascertain the pre-pubertal status and blood samples were collected. All the animals in group A (treatment) were injected with kisspeptin (Metastin) @ 1.3 μg/kg body wt. at every 3 days interval up to day 20 while in group B (control), normal saline was injected as placebo. Blood samples were collected on the day of injection and on the day of estrus in control as well as treatment group. Trans-rectal ultrasonography was also conducted at every 3 days interval till day 20 and at estrus to study the follicular development. Results revealed significant increase in Kiss1 and GPR54 mRNA expression following kisspeptin administration as compared to control. Level of FSH and Estradiol 17β was higher in treatment group while no difference was reported in plasma progesterone in control and treatment group. Increased numbers of medium and large follicle were recorded in treatment group while control group showed only small and medium follicles. Early onset of estrus was reported in treatment group than in control. It may be concluded that exogenous administration of kisspeptin increased expression of Kiss1 and GPR54 mRNA; peripheral FSH and estradiol concentration, increased follicular growth and early onset of estrus in treated heifers than in control.
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17
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Neuman-Lee L, Greives T, Hopkins GR, French SS. The role of the kisspeptin system in regulation of the reproductive endocrine axis and territorial behavior in male side-blotched lizards (Uta stansburiana). Horm Behav 2017; 89:48-54. [PMID: 28017596 DOI: 10.1016/j.yhbeh.2016.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/23/2016] [Accepted: 12/12/2016] [Indexed: 11/18/2022]
Abstract
The neuropeptide kisspeptin and its receptor are essential for activation of the hypothalamic-pituitary-gonadal (HPG) axis and regulating reproduction. While the role of kisspeptin in regulating the HPG axis in mammals has been well established, little is known about the functional ability of kisspeptins to activate the HPG axis and associated behavior in non-mammalian species. Here we experimentally examined the effects of kisspeptin on downstream release of testosterone and associated aggression and display behaviors in the side-blotched lizard (Uta stansburiana). We found that exogenous treatment with kisspeptin resulted in an increase in circulating testosterone levels, castration blocked the kisspeptin-induced increase in testosterone, and testosterone levels in kisspeptin-treated animals were positively related to frequency of aggressive behaviors. This evidence provides a clear link between kisspeptin, testosterone, and aggressive behavior in lizards. Thus, it is likely that kisspeptin plays an important role more broadly in non-mammalian systems in the regulation of reproductive physiology and related behaviors.
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Affiliation(s)
- Lorin Neuman-Lee
- Department of Biology, Utah State University, 5305 Old Main Hill, Logan, UT 84322-5305, USA
| | - Timothy Greives
- Department of Biological Sciences, North Dakota State University, Fargo, ND 58106, USA
| | - Gareth R Hopkins
- Department of Biology, Utah State University, 5305 Old Main Hill, Logan, UT 84322-5305, USA
| | - Susannah S French
- Department of Biology, Utah State University, 5305 Old Main Hill, Logan, UT 84322-5305, USA; The Ecology Center, Utah State University, 5205 Old Main Hill, Logan, UT 84322-5205, USA.
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18
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Aytürk N, Firat T, Kükner A, Özoğul C, Töre F, Kandirali İE, Yilmaz B. The effect of kisspeptin on spermatogenesis and apoptosis in rats. Turk J Med Sci 2017; 47:334-342. [PMID: 28263511 DOI: 10.3906/sag-1505-69] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 04/21/2016] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND/AIM To study the effect of kisspeptin, a gonadotropin release stimulator, on the testicular tissue of the rat. MATERIALS AND METHODS Four groups were formed as follows: control, Kiss-10 501397645907nmol administration for 1 day, Kiss-10 administration for 13 days, and one last group kept for 7 days following Kiss-10 applied for 13 days. Testicular tissues were stained with hematoxylin-eosin, periodic acid Schiff, Masson trichrome staining, terminal deoxynucleotidyl transferased UTP nick-end labeling, and Ki-67 immune staining. Serum testosterone levels were determined. RESULTS Serum testosterone level increased following acute application, while it was reduced by chronic treatment. Spermatogenic cells as stained by Ki-67 and TUNEL increased in the treated groups compared to the controls. Following a 7-day rest after treatment, a decrease in testosterone levels and Ki-67-stained cell numbers and an increase in TUNEL-stained cells were observed. Leydig cells showed increased vacuolization in the Kiss-1 group. Leydig cell vacuolization continued in the Kiss (13) group and was reduced in the Kiss (13 + 7) group. CONCLUSION Kiss-10 increased spermatogenic cell proliferation, while testosterone level and proliferation decreased and apoptosis increased during the waiting period.
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Affiliation(s)
- Nilüfer Aytürk
- Department of Histology and Embryology, Faculty of Medicine, Medipol University, İstanbul, Turkey
| | - Tülin Firat
- Department of Histology and Embryology, Faculty of Medicine, Abant İzzet Baysal University, Bolu, Turkey
| | - Aysel Kükner
- Department of Histology and Embryology, Faculty of Medicine, Abant İzzet Baysal University, Bolu, Turkey
| | - Candan Özoğul
- Department of Histology and Embryology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Fatma Töre
- Department of Physiology, Faculty of Medicine, SANKO University, Gaziantep, Turkey
| | - İsmail Engin Kandirali
- Department of Urology Clinics, Bağcılar Education and Research Hospital, İstanbul, Turkey
| | - Bayram Yilmaz
- Department of Physiology, Faculty of Medicine, İstanbul Yeditepe University, İstanbul, Turkey
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19
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Acute regulation of plasma insulin-like peptide 3 concentrations by luteinizing hormone in male goats. Theriogenology 2016; 86:749-56. [DOI: 10.1016/j.theriogenology.2016.02.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 02/28/2016] [Indexed: 11/21/2022]
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20
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Dardente H, Lomet D, Robert V, Decourt C, Beltramo M, Pellicer-Rubio MT. Seasonal breeding in mammals: From basic science to applications and back. Theriogenology 2016; 86:324-32. [DOI: 10.1016/j.theriogenology.2016.04.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 02/02/2016] [Accepted: 03/14/2016] [Indexed: 12/29/2022]
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21
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Investigation the mRNA expression of KISS1 and localization of kisspeptin in the testes of Shiba goats and its relationship with the puberty and steriodogenic enzymes. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.10.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Hannan MA, Fukami Y, Kawate N, Sakase M, Fukushima M, Pathirana IN, Büllesbach EE, Inaba T, Tamada H. Plasma insulin-like peptide 3 concentrations are acutely regulated by luteinizing hormone in pubertal Japanese Black beef bulls. Theriogenology 2015; 84:1530-5. [PMID: 26318230 DOI: 10.1016/j.theriogenology.2015.07.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
Insulin-like peptide 3 (INSL3) is a major secretory product of testicular Leydig cells. The mechanism of acute regulation of INSL3 secretion is still unknown. The present study was undertaken in pubertal beef bulls to (1) determine the temporal relationship of pulsatile secretion among LH, INSL3, and testosterone and (2) monitor acute regulation of INSL3 secretion by LH using GnRH analogue and hCG. Blood samples were collected from Japanese Black beef bulls (N = 6) at 15-minute intervals for 8 hours. Moreover, blood samples were collected at -0.5, 0, 1, 2, 3, 4, 5, and 6 hours after GnRH treatment and -0.5, 0, 2, 4, and 8 hours on the day of treatment (Day 0), and Days 1, 2, 4, 8, and 12 after hCG treatment. Concentrations of LH, INSL3, and testosterone determined by EIAs indicated that secretion in the general circulation was pulsatile. The frequency of LH, INSL3, and testosterone pulses was 4.7 ± 0.9, 3.8 ± 0.2, and 1.0 ± 0.0, respectively, during the 8-hour period. Seventy percent of these INSL3 pulses peaked within 1 hour after a peak of an LH pulse had occurred. The mean increase (peak per basal concentration) of testosterone pulses was higher (P < 0.001) than that of INSL3 pulses. After GnRH treatment, LH concentrations increased (P < 0.01) dramatically 1 hour after treatment and remained high (P < 0.05) until the end of sampling, whereas an elevated (P < 0.05) INSL3 concentration occurred at 1, 2, 5, and 6 hours after treatment. Testosterone concentrations increased (P < 0.01) 1 hour after the treatment and remained high until the end of sampling. After hCG treatment, an increase of INSL3 concentration occurred at 2 and 4 hours, and Days 2, 4, and 8 after treatment (P < 0.05), whereas in case of testosterone, concentrations remained high (P < 0.01) until Day 8 after treatment. The increase (maximum per pretreatment concentration) of INSL3 concentrations after injecting GnRH or hCG was much lower (P < 0.001) than that of testosterone. In conclusion, secretion of INSL3 in blood of bulls occurred in a pulsatile manner. We inferred an acute regulation of INSL3 by LH in bulls because INSL3 concentrations increased immediately after endogenous and exogenous LH stimulation. The increase of INSL3 concentrations by LH was much lower than that of testosterone in bulls.
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Affiliation(s)
- M A Hannan
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Y Fukami
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - N Kawate
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, Japan.
| | - M Sakase
- Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forest and Fishery, Wadayama, Hyogo, Japan
| | - M Fukushima
- Northern Center of Agricultural Technology, General Technological Center of Hyogo Prefecture for Agriculture, Forest and Fishery, Wadayama, Hyogo, Japan
| | - I N Pathirana
- Department of Animal Science, Faculty of Agriculture, University of Ruhuna, Kamburupitiya, Sri Lanka
| | - E E Büllesbach
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - T Inaba
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - H Tamada
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, Japan
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Effects of kisspeptin-10 on in vitro proliferation and kisspeptin receptor expression in primary epithelial cell cultures isolated from bovine placental cotyledons of fetuses at the first trimester of pregnancy. Theriogenology 2015; 83:978-987.e1. [DOI: 10.1016/j.theriogenology.2014.11.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/25/2014] [Accepted: 11/26/2014] [Indexed: 01/12/2023]
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24
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Samir H, Sasaki K, Ahmed E, Karen A, Nagaoka K, El Sayed M, Taya K, Watanabe G. Effect of a single injection of gonadotropin-releasing hormone (GnRH) and human chorionic gonadotropin (hCG) on testicular blood flow measured by color doppler ultrasonography in male Shiba goats. J Vet Med Sci 2015; 77:549-56. [PMID: 25715956 PMCID: PMC4478734 DOI: 10.1292/jvms.14-0633] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Although color Doppler ultrasonography has been used to evaluate testicular blood flow in
many species, very little has been done in goat. Eight male Shiba goats were exposed to a
single intramuscular injection of either gonadotropin-releasing hormone (GnRH group; 1
µg/kg BW) or human chorionic gonadotropin (hCG group; 25 IU/kg BW).
Plasma testosterone (T), estradiol (E2) and inhibin (INH) were measured just before (0 hr)
and at different intervals post injection by radioimmunoassay. Testis volume (TV) and
Doppler indices, such as resistive index (RI) and pulsatility index (PI) of the
supratesticular artery, were measured by B-mode and color Doppler ultrasonography,
respectively. The results indicated an increase in testicular blood flow in both groups,
as RI and PI decreased significantly (P<0.05), but this increase was
significant higher and earlier in hCG group (1 hr) than in the GnRH group (2 hr). A high
correlation was found for RI and PI with both T (RI, r= −0.862; PI, r= −0.707) and INH in
the GnRH group (RI, r=0.661; PI, r=0.701). However, a significant
(P<0.05) correlation was found between E2 and both RI (r= −0.610) and
PI (r= −0.763) in hCG group. In addition, TV significantly increased and was highly
correlated with RI in both groups (GnRH, r= −0.718; hCG, r= −0.779). In conclusion, hCG
and GnRH may improve testicular blood flow and TV in Shiba goats.
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Affiliation(s)
- Haney Samir
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, Tokyo183-8509, Japan
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25
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Espigares F, Carrillo M, Gómez A, Zanuy S. The Forebrain-Midbrain Acts as Functional Endocrine Signaling Pathway of Kiss2/Gnrh1 System Controlling the Gonadotroph Activity in the Teleost Fish European Sea Bass (Dicentrarchus labrax)1. Biol Reprod 2015; 92:70. [DOI: 10.1095/biolreprod.114.125138] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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26
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Meccariello R, Chianese R, Chioccarelli T, Ciaramella V, Fasano S, Pierantoni R, Cobellis G. Intra-testicular signals regulate germ cell progression and production of qualitatively mature spermatozoa in vertebrates. Front Endocrinol (Lausanne) 2014; 5:69. [PMID: 24847312 PMCID: PMC4021137 DOI: 10.3389/fendo.2014.00069] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 04/22/2014] [Indexed: 11/13/2022] Open
Abstract
Spermatogenesis, a highly conserved process in vertebrates, is mainly under the hypothalamic-pituitary control, being regulated by the secretion of pituitary gonadotropins, follicle stimulating hormone, and luteinizing hormone, in response to stimulation exerted by gonadotropin releasing hormone from hypothalamic neurons. At testicular level, gonadotropins bind specific receptors located on the somatic cells regulating the production of steroids and factors necessary to ensure a correct spermatogenesis. Indeed, besides the endocrine route, a complex network of cell-to-cell communications regulates germ cell progression, and a combination of endocrine and intra-gonadal signals sustains the production of high quality mature spermatozoa. In this review, we focus on the recent advances in the area of the intra-gonadal signals supporting sperm development.
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Affiliation(s)
- Rosaria Meccariello
- Dipartimento di Scienze Motorie e del Benessere, Università di Napoli Parthenope, Naples, Italy
| | - Rosanna Chianese
- Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Naples, Italy
| | - Teresa Chioccarelli
- Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Naples, Italy
| | - Vincenza Ciaramella
- Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Naples, Italy
| | - Silvia Fasano
- Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Naples, Italy
| | - Riccardo Pierantoni
- Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Naples, Italy
- *Correspondence: Riccardo Pierantoni, Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Via Costantinopoli 16, Naples 80138, Italy e-mail:
| | - Gilda Cobellis
- Dipartimento di Medicina Sperimentale sez “F. Bottazzi”, Seconda Università degli Studi di Napoli, Naples, Italy
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27
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Subcutaneous administration of Kiss1 pentadecapeptide accelerates spermatogenesis in prepubertal male chub mackerel (Scomber japonicus). Comp Biochem Physiol A Mol Integr Physiol 2013; 166:228-36. [DOI: 10.1016/j.cbpa.2013.06.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 06/06/2013] [Accepted: 06/06/2013] [Indexed: 01/14/2023]
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28
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Jin J, Sawai K, Hashizume T. Effects of photoperiod on secretory patterns of growth hormone in adult male goats. Anim Sci J 2013; 84:790-7. [DOI: 10.1111/asj.12073] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 02/24/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Jin Jin
- Faculty of Agriculture; Iwate University; Morioka Japan
| | - Ken Sawai
- Faculty of Agriculture; Iwate University; Morioka Japan
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29
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Okamura H, Yamamura T, Wakabayashi Y. Kisspeptin as a master player in the central control of reproduction in mammals: an overview of kisspeptin research in domestic animals. Anim Sci J 2013; 84:369-381. [PMID: 23607315 DOI: 10.1111/asj.12056] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 01/16/2013] [Indexed: 11/30/2022]
Abstract
The hypothalamo-pituitary-gonadal (HPG) axis is the regulatory system for reproduction in mammals. Because secretion of gonadotropin-releasing hormone (GnRH) into the portal vessels is the final step at which the brain controls gonadal activities, the GnRH neuronal system had been thought to be central to the HPG axis. A newly discovered neural peptide, kisspeptin, has opened a new era in reproductive neuroendocrinology. As shown in a variety of mammals, kisspeptin is a potent endogenous secretagogue of GnRH, and the kisspeptin neuronal system governs both the pulsatile GnRH secretion that drives folliculogenesis, spermatogenesis and steroidogenesis, and the GnRH surge that triggers ovulation in females. The kisspeptin neuronal system is therefore considered a master player in the central control of mammalian reproduction, and kisspeptin and related substances could therefore be valuable for the development of novel strategies for the management of fertility in farm animals. To this end, the present review aimed to summarize the current research on kisspeptin signaling with a focus on domestic animals such as sheep, goats, cattle, pigs and horses.
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Affiliation(s)
- Hiroaki Okamura
- Animal Physiology Research Unit, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan
| | - Takashi Yamamura
- Animal Physiology Research Unit, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan
| | - Yoshihiro Wakabayashi
- Animal Physiology Research Unit, National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan
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