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Hernández-Hernández JM, Martin GB, Becerril-Pérez CM, Pro-Martínez A, Cortez-Romero C, Gallegos-Sánchez J. Kisspeptin Stimulates the Pulsatile Secretion of Luteinizing Hormone (LH) during Postpartum Anestrus in Ewes Undergoing Continuous and Restricted Suckling. Animals (Basel) 2021; 11:ani11092656. [PMID: 34573622 PMCID: PMC8469872 DOI: 10.3390/ani11092656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/07/2021] [Accepted: 08/31/2021] [Indexed: 11/16/2022] Open
Abstract
This study tested whether the intravenous application of kisspeptin can stimulate the pulsatile secretion of LH in suckling ewes during postpartum anestrus. Ten days after lambing, Pelibuey ewes were allocated among two groups: (1) continuous suckling (n = 8), where the lambs remained with their mothers; and (2) restricted suckling (n = 8), where the mothers suckled their lambs twice daily for 30 min. On Day 19 postpartum, the ewes were individually penned with ad libitum access to water and feed and given an indwelling catheter in each jugular vein. On Day 20, 4 mL of blood was sampled every 15 min from 08:00 to 20:00 h to determine LH pulse frequency. At 14:00 h, four ewes in each group received 120 μg of kisspeptin diluted in 3 mL of saline as a continuous infusion for 6 h; the remaining four ewes in each group received only saline. The interaction between kisspeptin and suckling type did not affect LH pulse frequency (p > 0.05). Before kisspeptin administration, pulse frequency was similar in all groups (1.50 ± 0.40 pulses per 6 h; p > 0.05). With the application of kisspeptin, pulse frequency increased to 3.50 ± 0.43 pulses per 6 h (p ≤ 0.014), so the concentration of LH (1.11 ± 0.14 ng mL-1) was greater in kisspeptin-treated ewes than in saline-treated ewes (0.724 ± 0.07 ng mL-1; p ≤ 0.040). The frequency of LH pulses was greater with restricted suckling than with continuous suckling (2.44 ± 0.29 versus 1.69 ± 0.29 pulses per 6 h; p ≤ 0.040). We conclude that intravenous application of kisspeptin increases the pulsatile secretion of LH in suckling ewes and that suckling might reduce kisspeptin neuronal activity, perhaps explaining the suppression of ovulation. Moreover, the effects of kisspeptin and suckling on pulsatile LH secretion appear to be independent, perhaps operating through different neural pathways.
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Affiliation(s)
- José Manuel Hernández-Hernández
- Programa de Ganadería, Colegio de Postgraduados, Campus Montecillo, km 36.5 Carretera Federal México-Texcoco, Montecillo 56230, Mexico; (J.M.H.-H.); (A.P.-M.)
| | - Graeme B. Martin
- School of Agriculture and Environment, University of Western Australia, Crawley 6009, Australia;
| | | | - Arturo Pro-Martínez
- Programa de Ganadería, Colegio de Postgraduados, Campus Montecillo, km 36.5 Carretera Federal México-Texcoco, Montecillo 56230, Mexico; (J.M.H.-H.); (A.P.-M.)
| | - César Cortez-Romero
- Colegio de Postgraduados, Campus San Luis Potosí, San Luís Potosi 78600, Mexico;
| | - Jaime Gallegos-Sánchez
- Programa de Ganadería, Colegio de Postgraduados, Campus Montecillo, km 36.5 Carretera Federal México-Texcoco, Montecillo 56230, Mexico; (J.M.H.-H.); (A.P.-M.)
- Correspondence: ; Tel.: +52-5959-520-200 (ext. 1723)
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Cheng Y, Gu J, Xue H, Li Q, Liang M, Wang N, Wang G, Wu Q, Liu S, Yu H, Zhang J, Hao L. Identification of Four SNPs in LHB Gene and Their Associations with Sperm Qualities of Chinese Buffaloes. Anim Biotechnol 2016; 28:168-173. [PMID: 27854152 DOI: 10.1080/10495398.2016.1244068] [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: 01/15/2023]
Abstract
Luteinizing hormone beta polypeptide (LHB) gene has been considered important for sexual behavior and has associations with sperm quality. In this study, four SNPs (g.276 T>C, g.377A>C, g.401T>C, and g.412A>G) were detected in the LHB gene of 165 water buffaloes by direct sequencing and identification of overlap peaks, each of which was associated with at least one sperm quality trait of ejaculate volume, sperm concentration, post-thaw sperm motilities, and sperm abnormalities by chi-square analysis. Among them, g.276 T>C was associated with ejaculate volume (F = 2.857, p < 0.05), sperm concentration (F = 2.052, p < 0.05), and post-thaw sperm motilities (F = 3.480, p < 0.05); g.377A>C was related to ejaculate volume (F = 4.178, p < 0.05), g.401T>C had a marker effect on sperm abnormalities (F = 3.332, p < 0.05), g.412A>G was associated with sperm concentration (F = 3.579, p < 0.05), and sperm abnormalities (F = 3.408, p < 0.05). Furthermore, four haplotypes (H1: ACG, H2: CCG, H3: CTA, H4: CCA) were generated by linkage disequilibrium analysis, which composed seven genotypes. Among them, the buffaloes with combined genotype H2H2 had the higher ejaculate volume and the individuals with the combined haplotypes H1H4 had higher sperm concentration. In summary, our study showed that there was a significant association between SNPs of LHB gene and Chinese water buffalo sperm quality traits. To the best of our knowledge, this is the first report addressing the associations between the SNPs in the LHB gene and the sperm qualities of Chinese buffaloes.
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Affiliation(s)
- Yunyun Cheng
- a College of Animal Science , Jilin University , Changchun , China
| | - Jiaming Gu
- a College of Animal Science , Jilin University , Changchun , China
| | - Han Xue
- a College of Animal Science , Jilin University , Changchun , China
| | - Qiang Li
- a College of Animal Science , Jilin University , Changchun , China
| | - Mingming Liang
- a College of Animal Science , Jilin University , Changchun , China
| | - Nan Wang
- a College of Animal Science , Jilin University , Changchun , China.,b China Institute of Veterinary Drug Control , Beijing , China
| | - Gang Wang
- a College of Animal Science , Jilin University , Changchun , China
| | - Qingyan Wu
- a College of Animal Science , Jilin University , Changchun , China
| | - Songcai Liu
- a College of Animal Science , Jilin University , Changchun , China.,c Five-Star Animal Health Pharmaceutical Factory of Jilin Province , Changchun , China
| | - Hao Yu
- a College of Animal Science , Jilin University , Changchun , China
| | - Jiabao Zhang
- a College of Animal Science , Jilin University , Changchun , China
| | - Linlin Hao
- a College of Animal Science , Jilin University , Changchun , China
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Montero-Pardo A, Diaz D, Olivares A, González-Padilla E, Murcia C, Gómez-Chavarín M, Gutiérrez-Ospina G, Perera-Marín G. Effect of ovine luteinizing hormone (oLH) charge isoforms on VEGF and cAMP production. Anim Reprod Sci 2015; 163:35-47. [PMID: 26507528 DOI: 10.1016/j.anireprosci.2015.09.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 09/22/2015] [Accepted: 09/26/2015] [Indexed: 11/16/2022]
Abstract
Although an increase in VEGF expression and synthesis in association with LH has been established; it is unknown if all LH isoforms act similarly. This study evaluated the production of cAMP and VEGF among LH isoforms in two in vitro bioassays. The LH was obtained from hypophyses and the group of isoforms was isolated by chromatofocusing. cAMP production was assessed using the in vitro bioassay of HEK-293 cells and VEGF production was evaluated in granulosa cells. Immunological activity was measured with a homologous RIA. Immunoactivity and bioactivity for each isoform were compared against a standard, by estimating the IC50 and the EC50. The basic isoforms were more immunoactive than the standard. The neutral and the moderately acidic had an immunological activity similar to the standard. The acidic isoform was the least immunoreactive. cAMP production at the EC50 dose was similar among the basic isoforms, the moderately acidic and the standard; for the neutral and the acidic, the EC50 dose was higher. It was observed that compared with the control, VEGF production at the lowest LH dose was no different in the standard and each isoform. In the intermediate dose, a positive response was caused in the standard and the neutral and basic isoforms. Although the acidic isoform showed a dose-dependent response, it was not significant relative to the control. In conclusion, the basic isoform generated the greatest cAMP and VEGF production, similar to the reference standard, and the acidic the smallest.
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Affiliation(s)
- Arnulfo Montero-Pardo
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico
| | - Daniel Diaz
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
| | - Aleida Olivares
- Unidad de Investigación Médica en Medicina Reproductiva, UMAE Hospital de Gineco Obstetricia No. 4 Luis Castelazo Ayala, IMSS, México D.F., Mexico
| | - Everardo González-Padilla
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico.
| | - Clara Murcia
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico
| | - Margarita Gómez-Chavarín
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
| | - Gabriel Gutiérrez-Ospina
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
| | - Gerardo Perera-Marín
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico; Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico.
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Perera-Marín G, Gutiérrez CG, Murcia C, León H, González-Padilla E. Progesterone and the distribution of pituitary gonadotropin isoforms in cattle. Anim Reprod Sci 2008; 104:164-76. [PMID: 17403588 DOI: 10.1016/j.anireprosci.2007.02.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Accepted: 02/21/2007] [Indexed: 10/23/2022]
Abstract
The objective of the present study was to determine the relative proportion of gonadotropin isoforms in bovine pituitary glands affected by progesterone. Twelve postpubertal heifers (Swiss-Zebu) were assigned to three groups (n=4): intact animals in the luteal phase of the estrous cycle (diestrus group); ovariectomized heifers with (OVXP) or without progesterone treatment (OVX). Prior to pituitary gland collection, a blood sample was taken from each animal to determine the circulating progesterone concentration. Pituitary protein extractions processed by chromatofocusing were eluted with a pH gradient ranging from 10.5 to 3.5. The LH and FSH eluent was grouped on the basis of the following three criteria: (1) as either a basic (pH>or=7.5), neutral (pH 7.4-6.5) and acid (pH<or=6.4); (2) according to the pH unit (pH>or=10.5-3.5); (3) on the basis of distinct isoforms 12 peaks of which (A-L) were identified for LH and 11 (I-XI) for FSH. The analysis by range of pH and by pH of elution in the OVX and OVXP groups showed no difference in the LH and FSH isoform ratio, but diestrus cattle differs having a greater ratio (p<0.05) of basic LH isoforms (87.5+/-0.4%) and lesser ratio (p<0.05) of acid isoforms (5.4+/-0.7%). In the diestrus group, the ratio of acid FSH isoform increased (62.1+/-1.7%), while neutral isoforms decreased (5.7+/-0.4%, P<0.05). The analysis by isoform type of LH revealed a greater proportion of isoforms C (pH 9.4) and E (pH 9.0) in the groups with circulating progesterone when compared to the OVX group. The heterogeneity of FSH was quantitatively similar in most isoforms in the three groups, with the exception of the predominant isoform (VIII, pH 4.9) that was more abundant in the diestrus group (p<0.05). These results indicate that progesterone with other gonad factors influence the pituitary glicosylation altering the relative proportions of gonadotropin isoforms.
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Affiliation(s)
- G Perera-Marín
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, D.F., CP 04510, Mexico.
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Perera-Marín G, Murcia C, González-Padilla E. Luteinizing hormone (LH) isoforms in ruminants: Characterization and physiological relevance. Anim Reprod Sci 2007; 101:187-207. [DOI: 10.1016/j.anireprosci.2007.03.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2005] [Accepted: 03/09/2007] [Indexed: 11/16/2022]
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Rojas-Maya S, González-Padilla E, Murcia-Mejía C, Olivares-Segura A, Hernández-Cerón J, Perera-Marín G. Caprine luteinizing hormone isoforms during the follicular phase and anestrus. Anim Reprod Sci 2007; 100:280-90. [PMID: 16963202 DOI: 10.1016/j.anireprosci.2006.07.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2006] [Accepted: 07/31/2006] [Indexed: 11/27/2022]
Abstract
The relative proportion of the circulating luteinizing hormone isoforms in goats during follicular phase (pre-ovulatory peak; F) and anestrus (A) was investigated. Estrus was synchronized in six goats with a prostaglandin analogue. After estrus was detected, blood samples were taken at 1 h intervals for 24 h. Four anestrous goats received 100 microg i.v. of GnRH and blood samples were collected every 15 min for 5 h. Samples with the greatest LH concentration in follicular phase and after GnRH administration (anestrus) were analyzed by chromatofocusing and eluted with a pH gradient from 10.5 to 3.5. For quantification purposes eluted LH was grouped into basic (pH> or =7.5), neutral (pH 7.4-6.5) and acidic isoforms (pH< or =6.4) as well as by pH unit. In both physiological conditions (PC), basic and acidic isoforms were greater than the neutral. With this grouping criteria, there was an interaction between PC and pH group, with the proportion of neutral isoforms being greater (p<0.05) in A (12.0+/-0.8%) as compared with F (5+/-2%). Analysis by pH unit showed a very basic group of eluted isoforms (pH> or =10), which amounted to a percentage of 6.0+/-0.4% of the total observed during A, and 3+/-1% during F (p<0.05). Predominant isoforms in A eluted in the pH range 9.99-9.0 (42+/-3%) as compared to 7+/-3% (p<0.01) in that pH range in F. In contrast, the predominant isoforms in F eluted in the pH range 8.99-8.0, representing 55+/-8%, while in A the proportion was 11+/-2% (p<0.01). Isoforms eluted at the pH range 7.9-7 represented a significantly greater proportion during A (5.0+/-0.6%) as compared with F (3+/-1%). This is the first report on goat LH circulating isoforms. During A the LH isoforms secreted by the pituitary are more basic than during F.
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Affiliation(s)
- S Rojas-Maya
- Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, UNAM, Cd. Universitaria, CP 04510 México, DF, Mexico
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Macdonald GJ, Wise TH, Sluss PM, Ford JJ. Breed differences in clearance of porcine FSH in hypophysectomized rats. Anim Reprod Sci 2007; 102:328-34. [PMID: 17418509 DOI: 10.1016/j.anireprosci.2007.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2006] [Accepted: 03/06/2007] [Indexed: 10/23/2022]
Abstract
Extracts of anterior pituitary (AP) glands were infused i.v. into hypophysectomized male rats followed by sequential sampling of blood for 120 min. Determination of follicle-stimulating hormone (FSH) concentrations established that FSH from Chinese Meishan males decreased in the circulation of rats more slowly than FSH in extracts of AP from crossbred occidental pigs (P<0.003). Additionally, FSH from AP extracts of castrated males disappeared somewhat more slowly (P<0.06) than FSH from extracts of boars. Evaluation of FSH by bioassay and radioimmunoassay yielded similar concentrations in AP from Meishan and crossbred boars. Serum testosterone concentrations increased with time through 90 min after infusion of AP, but the rate of increase of testosterone was not related to amount of luteinizing hormone (LH) that was administered indicating LH receptor saturation. Unexpectedly, the rate of increase in testosterone was more rapid with AP extracts from boars than with extracts from castrated males. Observations from the current study imply structural alterations of FSH in the AP of Meishan males relative to crossbred males allowing sustained concentrations in the circulation, and this FSH possesses similar activation of the FSH receptor. The amount of LH in the AP extracts saturated the LH receptors of the hypophysectomized male rats, but some factor in extracts of boars differed from those of castrated males.
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Affiliation(s)
- G J Macdonald
- Department of Neuroscience and Cell Biology, University of Medicine and Dentistry, Robert Wood Johnson (Rutgers) Medical School, Piscataway, NJ 08854, USA
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