Adrenocorticotropin release inhibiting factor
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United States of America Patent
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Aug 27, 1991
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N/A
app pub date -
Jul 11, 1988
filing date -
Jul 11, 1988
priority date (Note) -
Expired
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Abstract
A method for alleviating stress induced immunosuppression is accomplished by application of low doses of ANF[1-28] or other ANF analogs having intact N-terminal sequences. Atrial natriuretic factors (ANFs) with intact N-terminal sequences are shown to be effective inhibitors of CRF 41-stimulated ACTH secretion when the ANFs are present in low concentrations. ANF[1-28] significantly inhibited ACTH release stimulated by 1-5 nM CRF. At the most effective concentration of 100 pM, ACTH release was inhibited by 40.1% (p<0.001). This effect was manifested after three hours, but not after only one half or one hour of incubation. Conversely, ANF[5-28], at concentrations of 10 to 10,000 pM, had no effect on ACTH secretion after one half, one, or three hours. ANF[1-11] weakly inhibited ACTH secretion at concentrations of 100 pM and 1000 pM. Again, three hours of incubation was required to manifest these effects.
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