ヒト脂肪内リンパ組織FALCと自然免疫を担当するナチュラル・ヘルパー(NH)細胞の機能解析を行った。全身脂肪組織のFALCを検索し腸間膜が最も明瞭でNH細胞も多いことが判明した。剖検症例の腸間膜NH細胞を単離し、サイトカイン刺激後の遺伝子発現変化や転写因子発現を解析したところ、ヒトNH細胞もマウス同様の遺伝子発現やサイトカン産生能を示した。NH細胞を標識して免疫不全マウス腹腔内へ移植したところ、マウス脂肪組織への定着とヒトIL-5, IL-13産生が確認された。糖尿病、メタボリック症候群の剖検症例腸間膜では対照群と比較してFALC組織の面積の減少傾向およびNH細胞数の有意な低下が認められた。
Pathophysiological examinations of human innate immunology-related natural helper (NH) cells in fat-associated lymphoid cluster (LALC) were done using autopsy cases. FALCs in adipose tissues of total body were analyzed anatomically and histologically, consequently FALC was dominantly located in mesentery and NH cells were most frequent in mesentery as compared to omentum, fat capsule of kidney, genitalia, and retroperitoneum. Hunan NH cells prepared from human mesentery had the same patterns of gene expressions and similar kinds of cytokine production to murine NH cells. Human NH cells labeled with CSFE were transplanted in NOG mice. As a result human NH cells lodged in murine adipose tissues and produced human IL-5 and IL-13 constitutively. The area of FALC and NH cell number was decreased in mesentery of cases with diabetes mellitus and metabolic syndrome as compared to control cases.

研究種目 : 基盤研究(B)
研究期間 : 2011～2013
課題番号 : 23390086
研究分野 : 医歯薬学
科研費の分科・細目 : 基礎医学・人体病理学