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[Nitric oxide in the lymphatic microvessel regulation]
E I Galanzha1, G E Brill', A V Solov'eva
1Saratov State Medical University, 410025 Saratov, 83 Astrakhanskaya St., Russia.
Rossiiskii Fiziologicheskii Zhurnal Imeni I.M. Sechenova
|December 31, 2002
Summary
Sodium nitroprusside dilates lymph vessels, while inhibiting nitric oxide synthesis alters responses, affecting lymph flow dynamics in rats.
Area of Science:
- Physiology
- Microcirculation
- Vascular Biology
Context:
- The lymphatic system is crucial for fluid homeostasis and immune surveillance.
- Nitric oxide (NO) plays a significant role in regulating vascular function.
- Understanding lymph microvessel responses to vasoactive agents is vital for lymphatic research.
Purpose:
- To investigate the effects of sodium nitroprusside and nitric oxide synthase inhibition on rat mesenteric lymph microvessel function.
- To elucidate the role of endogenous nitric oxide in modulating lymphangion and valve activity.
Summary:
- Topical sodium nitroprusside application induced lymphangion dilation and reduced pacemaker activity in rat mesentery, without impairing lymph flow.
- Inhibition of nitric oxide synthase with N-nitro-L-arginine increased lymph microvessel vasomotions and lymph flow velocity.
- Endogenous nitric oxide inhibition modified the response to sodium nitroprusside, causing lymphangion constriction and enhanced valve activity.
Impact:
- This study reveals the complex interplay between nitric oxide and lymph microvessel function.
- Findings contribute to understanding lymphatic physiology and potential therapeutic targets for lymphatic disorders.
- Provides insights into the dynamic regulation of lymph transport by vasoactive mediators.