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. 2021 Feb 26;11:145. doi: 10.1038/s41398-021-01266-1

Fig. 3. 3α,5α-THP inhibits MyD88, but not TRIF binding to TLRs.

Fig. 3

Protein extracts obtained from the NAc of male and female P rats (n = 3–4/grp) after administration of 3α,5α-THP (15 mg/kg) or vehicle (45% w/v 2-hydroxypropyl-β-cyclodextrin) were immunoprecipitated (IP) with antibody to MyD88 (A, B) or TRIF (C). Proteins immunoprecipitated with MyD88 antibody were analyzed by immunoblotting (IB) with TLR4 and MyD88 antibodies (A) and TLR7 and MyD88 antibodies (B). Proteins immunoprecipitated with TRIF antibody were analyzed by immunoblotting with TLR4 and TRIF antibodies (C). Normal IgG was used as immunoprecipitation control. MyD88 co-precipitated with TLR4 (A) and TLR7 (B), and TRIF co-precipitated with TLR4 (C) but MyD88 and TRIF did not co-precipitate with normal IgG (AC). A The levels of TLR4 co-precipitating with MyD88 were significantly reduced by 3α,5α-THP both in males (n = 3/grp) and females (n = 4/grp) (t-test, *p < 0.05). B The levels of TLR7 co-precipitating with MyD88 were also significantly reduced by 3α,5α-THP in females (t-test, *p < 0.05, n = 3/grp). C The levels of TLR4 co-precipitating with TRIF were not altered by 3α,5α-THP treatment both in males (n = 3/grp) and females (n = 3/grp) (t-test, p > 0.05).