title: Antitumor Allium Sulfides.
abstract: We examined the sulfides in onion (Allium cepa L.), Welsh onion (A. fistulosum L.), and garlic (A. sativum L.), and obtained three new thiolane-type sulfides (onionins A1-A3) from onion; two new thiabicyclic-type sulfides (welsonins A1, A2), together with onionins A1-A3, from Welsh onion; and six new acyclic-type sulfides (garlicnins L-1-L-4, E, and F), ten new thiolane-type sulfides (garlicnins A, B1-B4, C1-C3, K1, and K2), and three new atypical cyclic-type sulfides (garlicnins G, I, and J) from garlic. Acetone extracts showed the potential of these sulfides in inhibiting the polarization of M2 activated macrophages that are capable of suppressing tumor-cell proliferation. The effect of the thiolane-type sulfide of a major component, onionin A1, on tumor progression and metastasis in both osteosarcoma and ovarian cancer-bearing mouse models was then examined. Tumor proliferation was depressed, and tumor metastasis was controlled by regulating macrophage activation. These results showed that onionin A1is an effective agent for controlling tumors in both in vitro and in vivo models, and that the antitumor effects observed in vivo are likely caused by reversing the antitumor immune system. Activation of the antitumor immune system by onionin A1might be an effective adjuvant therapy for patients with osteosarcoma, ovarian cancer and other malignant tumors. Based on these findings, pharmacological investigations will be conducted in the future to develop natural and healthy foods and anti-cancer agents that can prevent or combat disease.
authors.affiliation: Faculty of Pharmaceutical Sciences, Sojo University.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
authors.forename: Yukio
authors.initials: Y
authors.lastname: Fujiwara
authors.forename: Mona
authors.initials: M
authors.lastname: El-Aasr
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ikeda
authors.forename: Masateru
authors.initials: M
authors.lastname: Ono
authors.forename: Daisuke
authors.initials: D
authors.lastname: Nakano
authors.forename: Junei
authors.initials: J
authors.lastname: Kinjo
mesh_terms: D000490:Allium / Q000737:chemistry*; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D049109:Cell Proliferation / Q000187:drug effects; D006801:Humans; D009369:Neoplasms / Q000188:drug therapy* / Q000276:immunology / Q000473:pathology*; D019697:Onions / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D013440:Sulfides