HSJ1b deficiency does not alter Hsp70 mRNA levels but alters both MAPT and BDNF levels. A:
Hsp70 mRNA expression levels are not significantly altered in wt (black column) versus mutant (solid gray column) transfected HEK293 cells (P= ns). B:
MAPT (TAU) mRNA levels are significantly reduced in HSJ1b mutant transfected HEK293 cells (solid gray column) when compared with their wild type counterparts (black column) (P= 0.001).C: BDNF levels are reduced in cell lysatesof HSJ1b mutant cells (P= 0.05) but not in wtHSJ1b transfected cells (black column) (ns), which showed similar BDNF levels than non-transfected cells (ns). D: Overexpression of wild type HSJ1b (black column) did not increase the release of BDNF into the cell culture media when compared with non-transfected cells (black and white column) (ns). BNDF media release is increased in mutant HSJ1b transfected cells (solid gray column) (P = 0.03). Results are representative of two (A, B) or four (C, D) separate experiments. Values represent means ± SEM. *P≤ 0.05, **P< 0.001, ns = non-significant.