Why the study?
Do blood collection techniques involving restraint or anaesthesia increase plasma renin concentration in rats compared to decapitation?
Do blood collection techniques involving restraint or anaesthesia increase plasma renin concentration in rats compared to decapitation?
Blood collection techniques involving restraint or anaesthesia significantly elevate plasma renin concentration in rats via a beta-adrenoreceptor mechanism, highlighting the critical impact of sampling methods in preclinical renin studies.
Answers are grounded in this paper and cite their sources.
Caution advised for PRC measurements in restrained or anesthetized rats; leaves open standardization of sampling methods in preclinical renin studies.
SUMMARY 1. Experiments were conducted in rats to determine the effects of various methods of blood collection upon plasma renin concentration (PRC). 2. Either restraint or anaesthesia during blood sampling resulted in PRC levels up to five times higher than in samples collected after decapitation. 3. A similar difference was observed in adrenalectomized rats, indicating that the PRC increase did not depend upon liberation of adrenal catecholamines. 4. In contrast, administration of propranolol abolished the difference in PRC between decapitated rats, and those sampled during ether anaesthesia, suggesting involvement of a β-adrenoreceptor mechanism in the stimulation of renin release by anaesthesia. 5. Despite high starting levels of PRC in ether-anaesthetized rats, the PRC response to water deprivation was proportionally the same (a 7-fold increase), whether sampling was carried out during ether anaesthesia or after decapitation.
No takes yet. Share an insight, caveat, or question.
Oates et al. (1974) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: