The expression of METTL4 in the low BMD group was significantly higher than that in the normal BMD group (Figure 6C), while the expression of RAB2A in the normal BMD group was significantly higher than that in the low BMD group (Figure 6D), suggesting that these two genes play an essential role in the occurrence and development of osteoporosis. The gene discussed is RAB2A; the disease is osteoporosis.