K. Tamagawa et al., PROANTHOCYANIDINS FROM BARLEY BRAN POTENTIATE RETINOIC ACID-INDUCED GRANULOCYTIC AND SODIUM BUTYRATE-INDUCED MONOCYTIC DIFFERENTIATION OF HL60 CELLS, Bioscience, biotechnology, and biochemistry, 62(8), 1998, pp. 1483-1487
Polyphenol extract from barley bran (BPE) induced nitro blue tetrazoli
um (NBT) reducing activity and alpha-naphthyl butyrate esterase activi
ty in HL60 human myeloid leukemia cells. Because BPE induced the bioch
emical markers of HL60 cell differentiation, we investigated the effec
ts of proanthocyanidins isolated from BPE on the HL60 cell differentia
tion of HL60 cells. Prodelphinidin B-3, T1, T2, and T3 induced 26-40%
NET-positive cells and 22-32% alpha-naphthyl butyrate esterase-positiv
e cells. Proanthocyanidins potentiated retinoic acid (all-trans-retino
ic acid)-induced granulocytic and sodium butyrate-induced monocytic di
fferentiation in HL60 cells.