Abstract:
:The tropomyosin receptor kinase (TRK) family includes TRKA, TRKB, and TRKC proteins, which are encoded by NTRK1, NTRK2 and NTRK3 genes, respectively. Binding of neurotrophins to TRK proteins induces receptor dimerization, phosphorylation, and activation of the downstream signaling cascades via PI3K, RAS/MAPK/ERK, and PLC-gamma. TRK pathway aberrations, including gene fusions, protein overexpression, and single nucleotide alterations, have been implicated in the pathogenesis of many cancer types, with NTRK gene fusions being the most well validated oncogenic events to date. Although the NTRK gene fusions are infrequent in most cancer types, certain rare tumor types are predominately driven by these events. Conversely, in more common histologies, such as lung and colorectal cancers, prevalence of the NTRK fusions is well below 5%. Selective inhibition of TRK signaling may therefore be beneficial among patients whose tumors vary in histologies, but share underlying oncogenic NTRK gene alterations. Currently, several TRK-targeting compounds are in clinical development. The ongoing Phase 2 trials with entrectinib and LOXO-101, two of the leading TRK inhibitors, are designed as 'basket trials', inclusive of patients whose tumors harbor NTRK gene fusions, independent of histology. Additional Phase 1 studies of other TRK inhibitors, including MGCD516, PLX7486, DS-6051b, and TSR-011, are underway. Interim data examining NTRK-rearranged tumors treated with entrectinib or LOXO-101 demonstrate encouraging activity, with patients achieving rapid and durable responses. Consequently, both drugs have achieved orphan designation from regulatory agencies, and efforts are underway to further expedite their development.
journal_name
Pharmacol Therjournal_title
Pharmacology & therapeuticsauthors
Khotskaya YB,Holla VR,Farago AF,Mills Shaw KR,Meric-Bernstam F,Hong DSdoi
10.1016/j.pharmthera.2017.02.006subject
Has Abstractpub_date
2017-05-01 00:00:00pages
58-66eissn
0163-7258issn
1879-016Xpii
S0163-7258(17)30020-7journal_volume
173pub_type
杂志文章,评审abstract::Alcoholism is a chronic relapsing disorder. Major characteristics observed in alcoholics during an initial period of alcohol abstinence are altered physiological functions and a negative emotional state. Evidence suggests that a persistent, cumulative adaptation involving a kindling/allostasis-like process occurs duri...
journal_title:Pharmacology & therapeutics
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journal_title:Pharmacology & therapeutics
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journal_title:Pharmacology & therapeutics
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journal_title:Pharmacology & therapeutics
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journal_title:Pharmacology & therapeutics
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journal_title:Pharmacology & therapeutics
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journal_title:Pharmacology & therapeutics
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更新日期:2019-01-01 00:00:00
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journal_title:Pharmacology & therapeutics
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更新日期:1997-01-01 00:00:00
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