7,8-Dihydroxyflavone acts as a potent and selective small-molecule agonist of the TrkB receptor (Kd ≈ 320 nM), the main signaling receptor of brain-derived neurotrophic factor (BDNF).

ANA-12 is a potent and selective TrkB antagonist with anxiolytic and antidepressant activity in mice.

Belizatinib(TSR-011) is an orally available inhibitor of both the receptor tyrosine kinase anaplastic lymphoma kinase (ALK) and the tropomyosin-related kinases (TRK) TRKA, TRKB, and TRKC, with potential antineoplastic activity.

Entrectinib (RXDX-101), a potent and selective small molecule inhibitor of TrkA/B/C, ROS1, and ALK kinases, has demonstrated early clinical activity when orally administered intermittently under fasting conditions.

GW 441756 is a specific Tropomyosin-related kinase A (TrkA) inhibitor with an IC50 value of 2 nM; little activity to c-Raf1 and CDK2.

LOXO-101 is a small molecule that was designed to block the ATP binding site of the TRK family of receptors, with 2 to 20 nM cellular potency against the TRKA, TRKB, and TRKC kinases.

LOXO-195 is a next-generation TRK kinase (TKI) inhibitor, with IC50s of 0.6±0.1 nM, <2.5 nM for TRKA and TRKC respectively.

PF-06273340 is a highly potent, kinases elective, well-tolerated pan-Trk inhibitor with IC50 values of 6, 4, 3 nM for TrkA, TrkB, Trk C, respectively.

GNF-8625 monopyridin-N-piperazine hydrochloride (TRKi-2), a TRK inhibitor, which is from the patent WO 2020038415 A1.

BDNF (human) is a neurotrophin in the central nervous system?and mediates survival and differentiation of neurons. BDNF (human) binds to TrkB and leads to the dimerization and autophosphorylation of tyrosine residues in the intracellular domain of the receptor. BDNF (human) can be used for study of neurodegenerative and psychiatric disorder.

Cyclotraxin B, a cyclic peptide, is a highly potent and selective TrkB inhibitor without altering the binding of BDNF. Cyclotraxin B non-competitively inhibits BDNF-induced TrkB activity with an IC50  of  0.30 nM. Cyclotraxin B can crosse the blood-brain-barrier and has analgesic and anxiolytic-like behavioral effects.

LPM4870108 is a potent and orally active pan-Trk (WT and MT) inhibitor, with IC50s of 0.2 nM, 2.4 nM, 3.5 nM and 2.3 nM for TrkC, TrkA, TrkAG595R and TrkAG667C, respectively. LPM4870108 shows selectivity for Trk over ALK (IC50=182 nM). LPM4870108 exhibits anti-tumor activity.

Cyclotraxin B TFA, a cyclic peptide, is a highly potent and selective TrkB inhibitor without altering the binding of BDNF. Cyclotraxin B TFA non-competitively inhibits BDNF-induced TrkB activity with an IC50  of  0.30 nM. Cyclotraxin B TFA can crosse the blood-brain-barrier and has analgesic and anxiolytic-like behavioral effects.

Trk-IN-6 shows excellent in vitro potency on a panel of TRK mutants (IC50 = 0.2-0.7 nM).

Trk-IN-7 (compound I-6) is a potent TRK inhibitor with IC50s of ranging from 0.25-10 nM for TRKA, TRKB and TRKC, respectively. Trk-IN-7 shows inhibition against EML4-ALK (IC50<15 nM) ALK G1202R, ALK C1156Y, ALK R1275Q, ALK F1174L, ALK L1197M, and ALK G1269A (IC50=5-50 nM).

Trk-IN-8 is a potent TRK inhibitor with IC50s of 0.42, 0.89 and 1.5 nM for TRKAa, TRKA(G595R) and TRKC(G623R), respectively (WO2021115401A1, compound 3).

Trk-IN-1 (example 9), a potent tropomyosin-related kinase (Trk) inhibitor, shows potency against TrkA (3.7 nM) and TrkB (94 nM), respectively.

Trk-IN-10 (Compound 14j) is a potent inhibitor of TRK (IC50 = 0.86, 6.92 nM, against TrkA, TrkAG595R, respectively). As a receptor tyrosine kinase (RTK), tropomyosin receptor kinase (Trk) is a key drug target in solid tumors. Trk-IN-10 (IC50 = 350 nM against ALK) has a higher selectivity of Trk inhibition, which may be of great significance for reducing toxicity.

Trk-IN-11 (Compound 14h) is a potent inhibitor of TRK (IC50 = 1.4, 1.8 nM, against TrkA, TrkAG595R, respectively). As a receptor tyrosine kinase (RTK), tropomyosin receptor kinase (Trk) is a key drug target in solid tumors. Trk-IN-11 has the potential for the research of cancer disease.

Trk-IN-9 (Compound 12) is a potent inhibitor of TRK. Trk-IN-9 inhibits the proliferation of Km-12 cell lines. Trk-IN-9 induces the apoptosis of Km-12 cells in a concentration-dependent manner. Trk-IN-9 inhibits the phosphorylation of TRK to block downstream pathways. Trk-IN-9 has the potential for the research of NTRK-fusion cancers.

TRK-IN-12 (Compound 9e) is a potent inhibitor of TRK (TRKG595R IC50 = 13.1 nM). TRK-IN-12 is a macrocyclic derivative compound. TRK-IN-12 shows significant antiproliferative activity in the Ba/F3-LMNA-NTRK1 cell line (IC50 = 0.080 μM). TRK-IN-12 has shown a better inhibitory effect (IC50 = 0.646 μM) than control drug LOXO-101 in Ba/F3-LMNA-NTRK1-G595R cell line.

AZD1332 is a potent, selective, ATP-competitive neurotrophic tyrosine kinase receptor (NRTK;TRK) inhibitor with IC50 of <10 nM; inhibits phosphorylation of TrkA/B/C in MCF10A cells overexpressing TrkA and NIH3T3 cells over expressing TrkA, TrkB, or TrkC with IC50 of <5 nM, inhibits a panel Baf3 survival driven by TrkA, TrkB, or TrkC with EC50 of 2 nM, AZD 1332 is orally available.