“Within the context of our hypothesis visceral nociception and nociceptor sensitization appear to be regulated by purinergic P2X3 and vanilloid TRPV1 receptors and 17β-estradiol modulates DRG neuron response to ATP (P2X agonist) and capsaicin (TRPV1 agonist) suggesting that visceral afferent nociceptors are modulated by estrogen in the DRG.”