5-Hydroxytryptamine Receptor 3A (HTR3A) is essential in transmission of nerve impulses across cell membranes, stimulating vomiting reflexes, enhancing cognition in rats, which could likely suggest their potential use as memory enhancers, implicated in various disorders, neurological diseases and human breast cancer cell line (MCF-7 [12-15]. The gene discussed is HTR3A; the disease is breast carcinoma.