Ishizaka S, Kimoto M, Kanda S, Saito S
Department of Parasitology, Nara Medical University, Kashihara, Japan.
Immunology. 1998 Nov;95(3):460-5. doi: 10.1046/j.1365-2567.1998.00652.x.
The latent form of transforming growth factor-beta (TGF-beta) in human milk and platelets was converted to the active form when conscious, pylorus-ligated mice were given human milk and platelets by intragastric intubation. Oral administration of TGF-beta exerted enhancing effects on the natural killer (NK)-cell activities in spleen and liver. Augmentation of NK-cell activities in spleen was observed for 7 days after oral administration of TGF-beta. TGF-beta at concentrations of 5 and 20 ng produced the greatest augmentation of NK-cell activities in spleen. However, NK-cell activities in spleen were unaffected when TGF-beta was given intravenously. Interleukin (IL)-12 production in spleen was enhanced by oral administration of TGF-beta, but not by intravenous administration of TGF-beta. These findings suggest that large amounts of TGF-beta in human milk are involved in early antiviral protection through the augmentation of NK-cell activities.
当对清醒的幽门结扎小鼠进行灌胃给予人乳和血小板时,人乳和血小板中转化生长因子β(TGF-β)的潜伏形式会转化为活性形式。口服TGF-β对脾脏和肝脏中的自然杀伤(NK)细胞活性具有增强作用。口服TGF-β后7天可观察到脾脏中NK细胞活性增强。浓度为5和20 ng的TGF-β可使脾脏中NK细胞活性增强最为显著。然而,静脉注射TGF-β时,脾脏中的NK细胞活性未受影响。口服TGF-β可增强脾脏中白细胞介素(IL)-12的产生,但静脉注射TGF-β则无此作用。这些发现表明,人乳中大量的TGF-β通过增强NK细胞活性参与早期抗病毒保护。