antagonist

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antagonist

1. any muscle that opposes the action of another
2. a drug that counteracts the effects of another drug

antagonist

[an′tag·ə‚nist]
(biochemistry)
A molecule that bears sufficient structural similarity to a second molecule to compete with that molecule for binding sites on a third molecule.
(pharmacology)
A drug or other chemical substance capable of reducing the physiological activity of another chemical substance; refers especially to a drug that opposes the action of a drug or other chemical substance on the nervous system by combining with and blocking the nerve receptor.
(physiology)
A muscle that contracts with, and limits the action of, another muscle, called an agonist, with which it is paired.
References in periodicals archive ?
It was left to the losing side in the House vote to point out, as Indiana Republican Mike Pence did, that now is probably not the best time to antagonize Ankara.
This is because influenza viruses, like many other viruses, encode mechanisms to evade and antagonize the IFN[alpha]/[beta] response (14).
The United States should take that role, if for no other reason than to antagonize the French government.
When asked if Antigua's vote for Japan's position at the International Whaling Commission was a factor in the country receiving the grant aid, Browne replied: "If we were to antagonize them I imagine that they would not be so anxious to assist us.
Of course it might be impolitic to antagonize these groups.
The value of native plant and animal species may still be unclear to western agriculturists but their preservation becomes mandatory in order to antagonize the risks of genetic erosion.
Tibi, a prolific scholar of Islam and Arab politics, repeatedly warns against the abuse of his argument: "we must never lose sight of the distinction between Islam and Islamic fundamentalism; any promotion of hostility to Islam itself in the guise of a clash of civilizations would unwittingly play into the hands of the fundamentalists in their efforts to antagonize the West" (p.
She still had hopes of being reinstated, and she feared that if she gave another interview she would further antagonize the company's management.
Since Aldus sued the Giunta press in 1507 and 1514 for their pirating of his titles, it would have made little sense for the Giunti to antagonize Aldus further by printing another of his titles.
Under the terms of the agreement, ImmuNext will grant Janssen a worldwide, exclusive license to develop and commercialize therapeutics that antagonize the V-region immunoglobulin-containing suppressor of T-cell activation (VISTA) signaling pathway.
The danger of an American-led Asian ''umbrella club,'' theoretically protected from any missiles - we say ''theoretically'' because of the technology's poor track record - is that it would unnecessarily isolate and antagonize China.
University of Otago (Dunedin, New Zealand) and Ludwig Institute for Cancer Research (New York, NY) have patented a method for using a viral VEGF-like protein from the orf virus strain NZ2 and from the orf virus strain NZ10 to bind to the extracellular domain of the VEGF receptor-2 to form bioactive complexes which mediate useful cellular responses and/or antagonize undesired biological activities.