1. The oxytocin secretory response during suckling in the hypoosmolar lactating rat
- Author
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Janine E. Janosky, Janet A. Amico, and Patricia L. Bononi
- Subjects
endocrine system ,medicine.medical_specialty ,Neuropeptide ,Oxytocin ,Rats, Sprague-Dawley ,Reference Values ,Internal medicine ,Lactation ,Animals ,Medicine ,Deamino Arginine Vasopressin ,Secretion ,Molecular Biology ,Post partum ,business.industry ,General Neuroscience ,Osmolar Concentration ,Radioimmunoassay ,medicine.disease ,Animals, Suckling ,Rats ,Endocrinology ,medicine.anatomical_structure ,Female ,Neurology (clinical) ,business ,Hyponatremia ,Breast feeding ,hormones, hormone substitutes, and hormone antagonists ,Developmental Biology ,medicine.drug - Abstract
Secretion of oxytocin into the peripheral circulation of rats is stimulated by suckling and inhibited by hypoosmolality. We compared the oxytocin secretory response to suckling in 1 week post partum lactating rats rendered hyponatremic for 48 h to matched lactating normonatremic cohorts. Pituitary content of oxytocin and peripheral oxytocin secretory responses to suckling were equivalent in normonatremic and hyponatremic animals. We conclude that induction of sustained hyponatremia for 48 h does not inhibit suckling-induced oxytocin release in lactating rats.
- Published
- 1993
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