Role of calcium and magnesium administration on sex ratio skewing, follicular fluid protein profiles and steroid hormone level and oocyte transcripts expression pattern in Wistar rat

A ARANGASAMY; S SELVARAJU; S PARTHIPAN; L SOMASHEKAR; D RAJENDRAN; J P RAVINDRA

doi:10.56093/ijans.v85i11.53227

Authors

A ARANGASAMY Senior Scientist, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, Karnataka 560 030 India
S SELVARAJU Senior Scientist, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, Karnataka 560 030 India
S PARTHIPAN Ph.D Scholar, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, Karnataka 560 030 India
L SOMASHEKAR Ph.D Scholar, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, Karnataka 560 030 India
D RAJENDRAN Senior Scientist, Animal Nutrition Division, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, Karnataka 560 030 India
J P RAVINDRA Principal Scientist and Head, Animal Physiology Division, ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, Karnataka 560 030 India

https://doi.org/10.56093/ijans.v85i11.53227

Keywords:

Calcium, Magnesium, Reproduction, Sex ratio, Testosterone, Wistar rat

Abstract

An attempt was made with 2% calcium and 0.4% magnesium administration to assess the changes in sex ratio skewing in Wistar rat. The results indicated that there was a significant change in sex ratio skewing towards females (11.7% and sex ratio skewed was 1:1.3). There was a significant reduction in serum testosterone levels (P< 0.01) between control (0.35±0.04 ng/ml) and treatment (0.20±0.08 ng/ml) groups and a nonsignificant decrease in follicular fluid. Significant changes were observed in serum T4 level between control (52.32±2.74 nmol/L) and treatment (33.18±3.75 nmol/L) groups. Variation in follicular fluid protein profiles were observed by 2D gel electrophoresis. Differential expression of protein with high molecular weight (52 and 80 kDa) and low pH is not present in treatment group and protein with low molecular weight (10 and 11 kDa) and high pH were observed in treatment group. The expression of transcripts for BMP-15 was 11.5 folds higher and GDF-9 was 3.5 folds higher in treatment group than control. Our results suggested that possible mechanism to favour female offspring could be reduction in serum testosterone and lowering follicular fluid protein molecular weight along with high pH (haemoglobin subunit beta-1 protein (Mr) 15.9 kDa; cytochrome b-c1 complex subunit 8 (Mr) 9.8 kDa; asparagine synthetase (Mr) 64.7 kDa; metal transporter CNNM4(Mr) 87.4 kDa) and increased mRNA expression of BMP-15 and GDF-9 in oocyte.

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