To detect whether the accumulation of miR5338 and down-regulation of Mfn1 in posterior lobes of rats, both simultaneously induced by rape bee pollen, might be related to apoptosis of BPH cells, we compared the expression of Bcl-2 between the model group and the rape bee pollen group by RT-qPCR (Fig. 5). Here, MFN1 is linked to benign prostatic hyperplasia.