Distribution of somatostatin (SS) immunoreactivity using specific rabbit antibodies in preoptic-anterior hypothalamus (PO-AH) of female rat brain

Brain Research
M Bhatnagar

Abstract

Distribution of somatostatin (SS) immunoreactivity was observed in the preoptic-anterior hypothalamus (PO-AH) of the female rat brain. Six specific rabbit antibodies A (SS-14), B (SS-28), C (SS-28 complete), D (SS 14 and SS-28 both), E (SS preprohormone) and F (GHRH) were used for immunostaining using Avidin-Biotin Complex (ABC) method (Hsu et al., 1981). Immunostaining was observed with all the six antibodies, in the serial sections passing through various bregma levels (-0.3 to -3.3 mm) of preoptic-anterior hypothalamic (PO-AH) region including median eminence (ME). In conclusion, the present study suggests that immunoreactive nerve terminals for both SS-14 and SS-28 are present in internal (IZ) and external zones (EZ) of ME. High intensity of SS-14 and SS-28 containing terminals in EZ suggests that both SS fractions are involved in regulating GH secretion in anterior pituitary. This is a first report on comparative distribution of immunoreactivities of four different fractions of SS, SS-preprohormone and GHRH in PO-AH.

References

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