Potent TMEM16A Small Molecule Treatment for Inflammatory and Reactive Airway Diseases, Asthma, Hypertension, Pain and Cancer

Tech ID: 29236 / UC Case 2017-138-0

Invention Novelty

A novel class of 2-acylamino-cycloalkylthiophene-3-carboxylic acid arylamides (AACTs) as potent TMEM16A inhibitors

Value Proposition

Transmembrane protein 16A (TMEM16A), also called anoctamin 1 (ANO1), is a Ca2+-activated Cl- channel expressed widely in mammalian epithelia, vascular smooth muscle and electrically excitable cells. Increased TMEM16A expression is associated with COPD and asthma, and TMEM16A is reported as a biomarker for gastrointestinal stromal and esophageal tumors. Pharmacological TMEM16A inhibitors, including the AACT small molecule scaffolds described in this invention, could be used to treat diseases such as inflammatory and reactive airway diseases, hypertension, gastrointestinal hypermotility and some cancers.

The TMEM16A inhibitors developed by UCSF scientists have the following advantages:

  • IC50 ~ 30 nM; substantially more potent than prior compounds
  • Substantially better metabolic stability and PK than prior compounds
  • Demonstrated efficacy in acute hypertension, inhibition of intestinal smooth muscle contraction and inhibition of GI tumor cell growth

Technology Description

The Verkman lab at the University of California, San Francisco has discovered, synthesized and biochemically evaluated of a series of TMEM16A inhibitors. The chemical structure of the 2-acylamino-cycloalkylthiophene-3-carboxylic acid arylamide inhibitor scaffold was refined through medicinal chemistry to identify bromodifluoroacetamide-based inhibitors with enhanced potency and metabolic stability.

Looking for Partners

To develop & commercialize the TMEM16A inhibitors as therapies for inflammatory and reactive airway diseases, hypertension, gastrointestinal hypermotility and some cancers.

Stage of Development

Proof of Concept – in vitro and ex vivo

Data Availability


Related Materials

Patent Status

Country Type Number Dated Case
European Patent Office Published Application 2017-138
Patent Cooperation Treaty Published Application WO2018195127 10/25/2018 2017-138

Additional Patent Pending


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  • Anderson, Marc O.
  • Phuan, Puay-Wah
  • Verkman, Alan S.

Other Information


Thiophene-arylamides, AACT, TMEM16A inhibitors, Ca2+-activated Cl- channel inhibitors

Categorized As