Fig. 2. Preliminary evaluation of riboflavin’s protective effects on arsenic-induced male reproductive toxicity in a mouse model.

A Schematic diagram of mouse model design and treatment. B, C Evaluation of sperm morphology and sperm quality (sperm counts, sperm motility, sperm viability, sperm malformation rate) in mice, the red arrow indicates sperm malformations (n = 5; Sperm malformations included macrocephaly, microcephaly, headlessness, double heads, irregular head shape, neck/midpiece folding, tail coiling, double tails, etc.). D, E Representative images of H&E staining in testicular and epididymal tissue (caput epididymis, corpus epididymis, cauda epididymis) (scale bars = 50 μm and/or 100 μm; Black triangle, cells shed into the lumen; Blue triangle, loss and disordered cell arrangement). F Statistical analysis of testicular tissue (outer diameter of seminiferous tubule, inner diameter of seminiferous tubule, thickness of seminiferous tubules, n = 5). Note: Control: Control group; As: Arsenic trioxide group; Ribo: riboflavin group; As + Ribo: co-administration of arsenic trioxide and riboflavin group. ***P < 0.001, **P < 0.01 and *P < 0.05 vs. Control group; ###P < 0.001, ##P < 0.01 and #P < 0.05 vs. As group.