To investigate the mechanisms behind the worsening of acute lung injury (ALI) in obesity, transcriptomic sequencing is performed, and significantly reduced mRNA levels of Aconitate Decarboxylase 1 (ACOD1) in the lung tissue of high‐fat diet (HFD) mice are found. The gene discussed is ACOD1; the disease is obesity due to melanocortin 4 receptor deficiency.