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ACTH fragments reverse experimental haemorrhagic shock in rats
Drugs Under Experimental and Clinical Research
|January 1, 1992
Summary
Adrenocorticotropic hormone (ACTH) fragments show promise in treating hypovolemic shock. ACTH (1-10) demonstrated efficacy comparable to ACTH (1-24) in improving blood pressure and survival rates in rats.
Area of Science:
- Physiology
- Endocrinology
- Pharmacology
Background:
- Hypovolemic shock, a critical condition due to significant blood loss, presents a major clinical challenge.
- Adrenocorticotropic hormone (ACTH) and its fragments are known for their physiological effects, but their role in acute shock states requires further elucidation.
Purpose of the Study:
- To investigate the therapeutic potential of various adrenocorticotropic hormone (ACTH) fragments in a rat model of hypovolemic shock.
- To compare the efficacy of different ACTH fragments, including ACTH (1-10) and ACTH (1-24), in reversing shock-induced hypotension and improving survival.
Main Methods:
- Hypovolemic shock was induced in rats by withdrawing approximately 50% of their total blood volume.
- Following stabilization of mean arterial pressure, rats received intravenous administration of different ACTH fragments (ACTH (1-4), (4-9), (4-10), (5-10), (1-10)) and ACTH (1-24).
- The effects on mean arterial pressure and survival rates were monitored and analyzed dose-dependently.
Main Results:
- Intravenous administration of ACTH fragments, particularly ACTH (1-10), promptly and dose-dependently improved mean arterial pressure in rats experiencing hypovolemic shock.
- ACTH (1-10) exhibited a therapeutic activity comparable to that of the full-length ACTH (1-24) in enhancing circulatory function and survival.
- Other tested ACTH fragments showed less pronounced effects compared to ACTH (1-10) and ACTH (1-24).
Conclusions:
- Short-chain ACTH fragments, specifically ACTH (1-10), possess significant potential as therapeutic agents for managing hypovolemic shock.
- The findings suggest that the therapeutic benefits of ACTH in shock may be mediated by specific, shorter fragments, offering potential for targeted drug development.
- ACTH (1-10) represents a promising candidate for further investigation as a treatment for hypovolemic shock due to its comparable efficacy to ACTH (1-24).