Prolactin modulates the incidence of diabetes in male and female NOD mice.

Abstract:

:The nonobese diabetic (NOD) mouse develops diabetes spontaneously due to autoimmune destruction of the pancreatic islets with a higher incidence in the female than the male. Prolactin (PRL), a hormone whose role has been previously focused on reproduction and lactation has been demonstrated to influence immune responses. In this study, we investigated the effect of hypoprolactinemia and hyperprolactinemia on the incidence of diabetes in male and female NOD mice. Our hypoprolactinemia model was induced from the time of weaning (21 days of age) to 112 days of age by daily injections of 200 micrograms of bromocriptine (CB-154). A hyperprolactinemic model was induced by a syngeneic anterior pituitary transplant (APT) to the kidney capsule at 35 days of age and maintained until 112 days of age. Additional experimental groups were also investigated. A group of males received pituitary transplants combined with daily subcutaneous injections of CB-154. A group of females treated with CB-154 was also given daily subcutaneous injections of 30 micrograms of oPRL. An ovariectomized (OVX-Control) group of females was also established to serve as a second control for the OVX-APT group. Bromocriptine administration did not significantly decrease plasma PRL levels compared to controls (CTRL) while APT animals had plasma PRL levels that were significantly higher (P < 0.01) than those of CTRL and CB-154 animals. These differences were observed in animals of both sexes. Bromocriptine treatment of APT groups significantly lowered plasma PRL levels from their respective controls. Plasma PRL from the OVX-Control group was markedly lower than the intact female control. The incidence of diabetes was significantly lower in female mice receiving CB-154 injections compared to the intact female CTRL group at 84, 98 and 112 days of age.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Autoimmunity

journal_title

Autoimmunity

authors

Hawkins TA,Gala RR,Dunbar JC

doi

10.3109/08916939409007991

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

155-62

issue

3

eissn

0891-6934

issn

1607-842X

journal_volume

18

pub_type

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