NCI Drug Dictionary

The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

TLR 2/6/9 agonist PUL-042
A solution consisting of a combination of two toll-like receptor (TLR) ligands: Pam2CSK4 acetate (Pam2), a synthetic diacylated lipopeptide (LP) that is an agonist of TLR2 and TLR6 (TLR2/6) and the TLR9 agonist oligodeoxynucleotide (ODN) M362, which contains unmethylated CpG-based dinucleotides, with potential immunostimulating activity. Upon administration via inhalation of the PUL-042 solution, the components in PUL-042 bind to and activate TLRs on lung epithelial cells. This induces the epithelial cells to produce peptides and reactive oxygen species (ROS) against pathogens, including bacteria, fungi and viruses, that are present in the lungs. M362, through binding of the CpG motifs to TLR9 and subsequent TLR9-mediated signaling, initiates the innate immune system and activates macrophages, natural killer (NK) cells, B cells, and plasmacytoid dendritic cells (pDCs), stimulates interferon-alpha (IFN-a) production and induces a T-helper 1 cells (Th1)-mediated immune response. Pam2CSK4, through TLR2/6, activates the production of T-helper 2 cells (Th2), leading to the production of Th2-specific cytokines. Altogether, this protects against and kills the pathogens present in the lungs and prevents pulmonary infection. TLRs play fundamental roles in both pathogen recognition and the activation of innate immunity. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:inhalation solution PUL-042
Pam2/M362 combination
Pam2CSK4 acetate/ODN M362
Pam2CSK4 acetate/ODN M362 combination
solution PUL-042
TLR agonist PUL-042
Toll-like receptor agonist PUL-042
Code name:PUL 042