Abstract:
A soybean protein hydrolysate is provided to induce expression of heme oxygenase-1(HO-1), protect cells by effects of HO-1 including anti-inflammation, cell proliferation and apoptosis inhibition, and protect and treat vascular damage shown in obesity, hypertension, impotence, dysuria, diabetes, arthritis and aging. A soybean protein hydrolysate for increasing expression of heme oxygenase-1 is prepared by hydrolyzing soybeans with endopeptidase and exopeptidase, or fermenting soybeans with a microorganism selected from Bacillus sp., Leuconostoc sp., Lactobacillus sp. and Aspergillus sp., separating the hydrolyzed or fermented solution into a solid phase and a liquid phase, and filtering and powdering the liquid phase, wherein the soybean is black soybean; the microorganism is Bacillus subtilis(KCTC 11029BP); and the soybean protein hydrolysate activate Co-cGMP(cyclic guanosine mono-phosphate) pathway.