Dolcanatide ia an orally administered analog of the human endogenous natriuretic hormone uroguanylin and guanylate cyclase C (GC-C) agonist, with potential laxative, anti-nociceptive and anti-inflammatory activities. Upon administration, dolcanatide, by mimicking uroguanylin, binds to and activates GC-C locally on endothelial cells in the gastrointestinal (GI) tract, without entering the systemic circulation. Activation of GC-C results in an increase in cyclic guanosine monophosphate (cGMP). Increased concentrations of cGMP lead to the activation of the anion channel cystic fibrosis transmembrane conductance regulator (CFTR). CFTR activation increases the secretion of negatively charged ions, particularly chloride and bicarbonate, into the GI tract lumen, which further drives sodium ions and then water into the lumen. This leads to increased fluid secretion in the GI tract, accelerated transit and changes in stool consistency. In addition, ion channel modulation may decrease muscle contractions and the activity of pain-sensing nerves, thereby decreasing intestinal pain. Also, GC-C may inhibit the secretion of pro-inflammatory cytokines, which may ameliorate GI inflammation. Delconitide is in phase I clinical trial to study how well it works in preventing colorectal cancer in healthy participants.

Thymoctonan (also known as Thymic humoral factor γ2 ) is an octapeptide thymic hormone patented by Yeda Research and Development Co. Ltd. as an immunoregulatory agent. In preclinical models, Thymoctonan exerts potent anti-tumor activity in mice and significantly increases the specific cytotoxic response of immune spleen cells. In addition, Thymoctonan treatment improved the competence of immune spleen cells in adoptive immunotherapy when performed in combination with chemotherapy by melphalan. Besides that Thymoctonan enhancing the anti-viral potential of murine cytomegalovirus immune spleen cells. In fatal murine cytomegalovirus infection model, daily injections of Thymoctonan- enhanced murine cytomegalovirus immune spleen cells prevented the development of a fatal disease in 93% of the recipient mice.

N-(2-Bromophenyl)-9-Methyl-9-Azabicyclo[3.3.1]Nonan-3-Amine (also known as AT-1001) is a high-affinity and highly selective ligand at α3β4 nicotinic cholinergic receptors (nAChRs) that was reported to decrease nicotine self-administration in rats. AT-1001 has a single-digit nanomolar binding affinity for the α3β4 nAChR and over 100-fold selectivity over the α4β2 nAChR and α7 nAChR in competition binding experiments. In electrophysiological experiments, AT-1001 had partial agonist activity at the α3β4 nAChR, evoking 35% of maximum ACh response, and at the same doses, produced desensitization of the ACh response, effectively acting as a functional antagonist at the α3β4 nAChR. Interestingly, AT-1001 also selectively decreased self-administration of cigarette smoke extract (CSE), an aqueous extract of cigarette smoke components, without altering natural food intake, when administered systemically to rats trained to self-administer CSE