Hyun-Seo Lee

Anti-Inflammatory and Antipruritic Effects of Luteolin from Perilla (P. frutescens L.) Leaves

Perilla (Perilla frutescens L.) leaves have shown therapeutic efficacy in the treatment of inflammatory disorders, allergies, bronchial asthma, and systemic damage due to free radicals. In the present study we analyzed the active constituents in perilla leaves using high-performance liquid chromatography (HPLC) and isolated luteolin, a polyphenolic flavonoid. We investigated the anti-inflammatory and antipruritic properties of luteolin. Luteolin inhibited the secretion of inflammatory cytokines such as interleukin-1β (IL-1 β) and tumor necrosis factor-α (TNF-α) from human mast cells (HMC-1) stimulated with phorbol myristate acetate plus calcium ionophore A23187 in a dose-dependent manner. Luteolin also significantly reduced the histamine release from rat peritoneal mast cells stimulated by compound 48/80, a potent histamine liberator. Furthermore, the administration of luteolin markedly inhibited the scratching behavior and vascular permeability induced by pruritogens, such as compound 48/80 or serotonin, in ICR mice. These results suggested that luteolin has potential as a therapeutic agent against inflammation and itch-related skin diseases.

Antioxidant and Anti-inflammatory Activities of Water-soluble Extracts from Different Parts of Kojongsi Persimmon (Diospyros kaki L.)

본 연구는 고종시 감나무 부위별 수용성 추출물의 항산화 및 항염증에 대한 효과를 조사하였다. 감꼭지와 감잎은 DPPH, ABTS 및 NO 등 라디칼을 효과적으로 제거하는 활성뿐만 아니라 환원력도 우수한 항산화 활성을 보였다. 또한 LPS에 의해 활성화된 설치류 유래 대식세포주인 RAW 264.7 세포에서 NO 생성억제는 감꼭지 ...