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식이유도 비만 생쥐의 식이제한과 운동처치 후 대식세포와 단핵구의 IL-6 및 TNF-α 생성의 변화

Changes of IL-6 and TNF-α production by macrophages and monocytes after restricted diet and exercise training intervention in diet-induced obese mice.

김기진
한국운동생리학회|2010.06|운동과학 (Exercise Science)|제19권 제2호|pp. 115-130|DOI 10.15857/ksep.2010.19.2.115

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참고문헌

키워드

dietimmune function비만obesity운동exercise식이macrophageIL-6TNF-α면역기능사이토카인cytokine대식세포interleukin-6

초록

본 연구는 6주간 식이조절에 의해서 유발된 비만상태의 수컷 생쥐(C57Bl/6)를 대상으로 8주간에 걸친 탄수화물 섭취량 변화를 중심으로 한 식이제한 및 트레드밀을 이용한 운동요법을 적용하여 면역기능과 관련된 혈액세포변인의 변화와 함께 리포다당복합체 자극에 대한 복강내 대식세포의 IL-6 및 TNF-α 분비능력을 분석하여 비만상태에 의해서 저하된 면역기능 개선효과를 비교한 결과는 다음과 같다. 첫째, 식이제한 혹은 운동프로그램을 적용하여 비만처치를 실시한 그룹은 모두 현저하게 감소된 체중을 나타냄으로서 처치효과가 일정하게 나타났으며, 특히 식이제한 그룹이 현저한 체중감소를 나타냄으로서 체중감소에는 식이제한이 가장 효과적인 것으로 간주되었다. 이에 반해서 운동그룹과 식이제한 및 운동처치를 병행한 그룹은 비만유도 후 일반식이 통제그룹보다 낮은 체중을 나타냈으나 유의한 체중차이를 나타내지 않음으로서 운동프로그램의 적용이 체중감소효과에는 식이제한방법보다 상대적으로 미흡한 것으로 간주되었다. 둘째, 식이처치에 의한 비만유도의 생쥐에서 과도한 지방섭취에 의한 비만상태는 말초혈액의 T-임파구를 중심으로 한 면역관련 세포의 감소를 초래하며 비만처치에 의한 체중감소는 말초혈액의 임파구 및 T-임파구 증가에 도움을 줄 수 있다고 생각된다. 셋째, 과도한 지방식이 섭취에 의한 비만유도는 대식세포에서의 LPS 자극에 대한 사이토카인 분비능력이 저하되며, 식이제한 및 운동프로그램 적용에 의한 비만처치 시 대식세포에서 LPS 자극에 대한 TNF-α 및 IL-6의 분비량이 현저히 증가하여 면역기능의 개선 가능성이 높은 것으로 간주되었다.

Abstract

This study was performed the analysis of blood cell numbers related immune function and lipopolysaccharide (LPS) stimulated production of tumor necrosis factor (TNF)-α and interleukin (IL)-6 by retroperitoneal macrophage in diet-induced obesity and obesity intervention of male C57Bl/6 mice. Diet-induced obesity was fed a high-fat or a standard chow diet for 6 weeks, and obesity intervention was drived by treadmill running exercise program or food intake restriction. Test items were measured by blood cell numbers related immune function and LPS stimulated production of TNF-α and IL-6 by retroperitoneal macrophage. Subjects of diet-induced obesity showed a significant increase of body weight as compared to normal diet group. High fat diet (HFD)-diet restriction (DR), HFD-exercise (EX) and HFD-DR-EX groups showed a significant decrease of body weight after 8 week intervention as compared to HFD-HFD group. And HFD-DR showed the highest decrease of body weight among intervntion groups. Diet-induced obese groups showed a decreasing tendency of blood cell numbers related immune function, and the intervention groups showed an increase of blood cell numbers related immune function after 8 week intervention. LPS stimulated production of TNF-α by retroperitoneal macrophage in diet-induced obesity showed a significant decrease than a ND group, and LPS stimulated production of TNF-α and IL-6 by retroperitoneal macrophage in intervention groups showed a significant decrease after 8 week of food intake restriction or exercise training. In conclusion, diet-induced obesity showed a attenuation of immune function, and improved the blood cell numbers related immune function and LPS stimulated production of TNF-α and IL-6 by retroperitoneal macrophage after exercise intervention and food intake restriction.

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