Immunization Against Vasoactive Intestinal Peptide and its Effects on Prolactin, Steroid, Luteinizing Hormone and Egg Production During Mid Laying Cycle in Punjab Brown (PB3 ) Birds

2008 ◽  
Vol 7 (11) ◽  
pp. 1100-1104 ◽  
Author(s):  
I.J. Reddy ◽  
G. Ravi Kiran ◽  
S.K. Mondal ◽  
S. Anandan
Keyword(s):  
Luteinizing Hormone ◽  
Vasoactive Intestinal Peptide ◽  
Egg Production

GnRH-1, GnIH mRNA and Luteinizing Hormone in Domestic hens (Gallus gallus domesticus) Exposed to Different Wavelengths of light

2017 ◽  
Vol 6 (8) ◽  
pp. 5446
Author(s):  
Reddy I.J. ◽  
Ashish Mishra ◽  
Mondal S.
Keyword(s):  
Luteinizing Hormone ◽  
Mrna Expression ◽  
Egg Production ◽  
Experimental Period ◽  
Treated Group ◽  
Lower Number ◽  
Gallus Gallus Domesticus ◽  
Blood Samples ◽  
Mrna Concentration ◽  
Normal Spectrum

The objective of this study was to establish the effects of red spectrum of light (650nm, treated n=12) and normal spectrum of light (450nm control=12) on GnRH-I and GnIH mRNA expression, amplitude and frequency of luteinizing hormone (LH) and egg production from 42 to 52 weeks of age in white leghorn hens. Blood samples were collected at weekly interval from both the groups. At the 47th week of age blood samples from both the groups were collected at every 3 h for 36h to study the pulsatile secretion of LH surges. GnRH and GnIH mRNA expression pattern was studied between control and treated birds. Egg production and pause days were calculated between the two groups. LH concentration in the plasma was increased significantly (P<0.01) in hens exposed to red spectrum of light. Plasma LH concentration was higher (P<0.01) in treated birds with more number of LH surges. The amplitude and frequencies of LH were advanced in birds exposed to red spectrum of light during 36 h of sampling at 3h intervals. GnRH-I mRNA concentration was significantly (P<0.01) higher, whereas GnIH mRNA was significantly (P<0.01) lower in birds exposed to red spectrum of light compared to controls. It is hypothesized that exposure of birds to red spectrum of light enhanced (P<0.01) GnRH-I mRNA, along with LH required for ovulation and egg lay. During 77 days (42-52 weeks of age) of the experimental period, egg production was increased (p<0.01) with lower incidence of pause days in the treated group. It is concluded that low GnIH mRNA and higher levels of GnRH-I mRNA, LH, lower number of pause days enabled the birds to lay more eggs by stimulating GnRH through red spectrum of light.

The actions of motilin, luteinizing hormone releasing hormone, cholecystokinin, somatostatin, vasoactive intestinal peptide, and other peptides on rat cerebral cortical neurons

1980 ◽  
Vol 58 (6) ◽  
pp. 612-623 ◽  
Author(s):  
J. W. Phillis ◽  
J. R. Kirkpatrick
Keyword(s):  
Cerebral Cortex ◽  
Luteinizing Hormone ◽  
Vasoactive Intestinal Peptide ◽  
Cortical Neurons ◽  
Spontaneous Firing ◽  
Luteinizing Hormone Releasing Hormone ◽  
Releasing Hormone ◽  
Depressant Action ◽  
Cerebral Cortical Neurons ◽  
Excitatory Action

The effects of a number of neuronally localized peptides have been ascertained on corticospinal and other unidentified neurons in the rat cerebral cortex. Motilin, somatostatin, and luteinizing hormone releasing hormone excited most of the corticospinal neurons on which they were tested. Cholecystokinin, Met-enkephalin, vasoactive intestinal peptide, and neurotensin also excited some corticospinal neurons. Many nonidentified neurons were excited by all of these peptides. Met-enkephalin had a depressant action on some (14%) corticospinal neurons. Leu-enkephalin depressed many identified and nonidentified neurons and had an excitatory action on a few neurons. Both excitatory and inhibitory actions of the enkephalins were antagonized by naloxone. Thyrotropin-releasing hormone had predominantly depressant actions on the spontaneous firing of corticospinal and nonidentified neurons but did excite some unidentified cortical neurons. Secretin had no effect on the firing of most of the neurons tested.

scholarly journals Association of polymorphisms of vasoactive intestinal peptide and its receptor with reproductive traits of turkey hens

2020 ◽  
Vol 50 (3) ◽  
pp. 345-352
Author(s):  
L. Hosseinpour ◽  
S. Nikbin ◽  
N. Hedayat-Evrigh ◽  
G. Elyasi-Zarringhabaie
Keyword(s):  
Vasoactive Intestinal Peptide ◽  
Egg Production ◽  
Pcr Amplification ◽  
Reproductive Traits ◽  
Single Strand Conformation Polymorphism ◽  
Production Traits ◽  
Single Nucleotide ◽  
Egg Weight ◽  
Association Analyses ◽  
Intron 2

The aim of this study was to identify variations of vasoactive intestinal peptide (VIP) and VIP receptor-1 (VIPR-1) genes that might be associated with turkey reproductive traits. One hundred twenty turkey hens were recorded for age at first egg (AFE), first egg weight (FEW), egg number (EN), total egg weight (TEW), laying period (LP), and broodiness. The DNA was isolated from blood samples and subjected to PCR amplification of the meleagrine VIP and VIPR-1 genes. The SNPs were detected by single-strand conformation polymorphism and the variant DNA fragments were sequenced. One mutation in 3’-UTR of VIP (G5846A) and two SNPs in intron 2 of VIPR-1 (C17687T and A17690T) were found, all of them novel. The associations of the three detected SNPs with the reproductive traits of turkeys were evaluated. The detected polymorphisms were used for marker-trait association analyses. The results of association analysis showed that G5846A on 3’ UTR of VIP has a significant association with LP, EN, TEW, and AFE. The G allele of G5846A was the favourable SNP allele for LP, EN, and TEW traits. The AA genotype of A17690T on intron 2 of VIPR-1 was significantly associated with higher LP, EN, and TEW. AGAA haplotype showed association with higher EN and TEW. These results suggest that the SNPs in 3’-UTR of VIP and intron 2 of VIPR-1 genes may influence egg production traits in turkey hens.Keywords: broodiness, candidate gene, egg production, single nucleotide polymorphism, VIPR-1

Changes in numbers of large ovarian follicles, plasma luteinizing hormone and estradiol-17β concentrations and egg production figures in farmed ostriches throughout the year

2007 ◽  
Vol 67 (9) ◽  
pp. 1492-1502 ◽  
Author(s):  
R.G.G. Bronneberg ◽  
J.A. Stegeman ◽  
J.C.M. Vernooij ◽  
S.J. Dieleman ◽  
E. Decuypere ◽  
...  
Keyword(s):  
Luteinizing Hormone ◽  
Egg Production ◽  
Ovarian Follicles ◽  
Estradiol 17Β
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