In conclusion, in this study, we determined that STAT3, CORO1C, SERPINH1, MVP, ITGB5, PCM1, SIRT1, EEF1G, PTEN and RPS2 might be critical genes in the development and prognosis of obesity through bioinformatics analysis combined with validations. The gene discussed is ITGB5; the disease is obesity due to melanocortin 4 receptor deficiency.