In the ulcer group, the expression level of the LPA5 subtype was significantly decreased upon treatment with 0.3 M HCl/ethanol (p = 0.0003, Cohen’s d = 5.6) and indomethacin (p = 0.015, Cohen’s d = 2.6); however, the LPA2 receptor subtype was not affected under 0.3 M HCl/ethanol and indomethacin (Figure S1). The gene discussed is LPAR5; the disease is ulcer disease.