Anti-Inflammatory Effects of Ethanol Extracts from Ulva pertusa Kjellman on LPS-induced RAW 264.7 Cells and Mouse Model

일상생활에서 일어나는 면역반응은 인체 내부에서 발생하 는 생리적 보호 활동이며 염증은 우리의 눈으로 흔히 확인 할 수 있는 면역 반응 중 하나이다. 외부로부터의 세균에 감 염되거나 물리적, 화학적 자극을 받게 되면 우리 몸에서는 그 자극을 인지하고 방어기작을 나타내어 외부의 자극을 완 화시키거나 균을 제거하고 손상된 조직을 회복할 수 있도록 한다. 하지만 그 반응이 과다하게 되면 염증의 형태로 발생 하게 되며 염증은 특히 대식세포(macrophage)가 가장 큰 관 여를 한다[15]. 대식세포에는 다양한 receptor가 존재하며 여 러 가지 숙주 반응과 관련하여 항상성을 유지시킨다. 균이 침입함과 동시에 혈관의 투과성이 증대되면서 혈관 내로 염 증과 관련된 물질이 분비되어 통증을 유발하고, 붉어지며 붓 고 열을 발생시키기도 한다[14]. 대식세포는 여러 가지 cytokine들을 분비하여 직접적으로 외부의 물질을 파괴하거 나 다른 면역세포들을 모아 염증반응을 매개한다. 염증에 관 여하는 cytokine은 다양하게 존재하나 그 중에서도 tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-

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