(redirected from platelet factor)
Also found in: Dictionary, Thesaurus, Medical, Financial, Encyclopedia.


An event, circumstance, influence, or element that plays a part in bringing about a result.

A factor in a case contributes to its causation or outcome. In the area of Negligence law, the factors, or chain of causation, are important in determining whether liability ensues from a particular action done by the defendant.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.


n. 1) a salesman who sells in his/her own name on behalf of others, taking a commission for services. 2) something that contributes to the result.

Copyright © 1981-2005 by Gerald N. Hill and Kathleen T. Hill. All Right reserved.


1 a mercantile agent. An agent who is in the ordinary course of business entrusted with goods or documents of title representing goods with a view to their sale. A factor has a lien over goods entrusted to him; this lien covers any claims he may have against his principal arising out of the agency. Most factors will be mercantile agents (and have the powers of such) for the purposes of the Factors Act 1889. Under this Act, in certain circumstances a factor may pass a good title to goods entrusted to him.
2 an institution to whom a company assigns its book debts (see FACTORING).
3 in Scotland a landlord or superior's agent.
Collins Dictionary of Law © W.J. Stewart, 2006
References in periodicals archive ?
Finkel, "Elevated platelet factor 4 and [beta]-thromboglobulin plasma levels in depressed patients with ischemic heart disease," Biological Psychiatry, vol.
Owen, Plasma levels of a-thromboglobulin and platelet factor 4 as indices of platelet activation in vivo, Blood.
This function of platelets is known as platelet procoagulant activity or 'platelet factor 3'.
Drugs induced immune destruction of platelets can be caused by two mechanisms: a drug dependent binding of Fab part of the pathological IgG with the platelets, causing their destruction, and in the second type Fab portion of the pathological IgG binds to platelet factor 4(PF4).
For example, a small study found significantly elevated levels of platelet factor 4 among 12 depressed patients after a myocardial infarction, compared with 12 matched, nondepressed participants (Psychiatry Res.
Yet when the serum samples were tested for reactivity with antibodies, 100% of the samples reacted to platelet factor 4 bound to unfractionated heparin and to enoxaparin, but none reacted to platelet factor 4 bound to fondaparinux, Dr.
These cytokines include platelet-derived growth factor, transforming growth factor B1, platelet-derived epidermal growth factor, platelet-derived angiogenesis factor platelet factor 4, and platelet-activating factor.
We also investigated the persistence of circulating heparin-dependent antibodies by performing a platelet serotonin-release assay and an assay for anti-bodies against platelet factor 4.
When heparin is administered to patients susceptible to HIT, an antigen complex of heparin and platelet factor 4 (PF4) is formed.
The researchers insert into the virus the gene for platelet factor 4 (PF4), a substance that stops the growth of blood vessels.
Tilley et al., "Amplification of bacteria-induced platelet activation is triggered by FcyRIIA, integrin [[alpha].sub.1][[beta.sub.3], and platelet factor 4," Blood, vol.
Testing for platelet factor 4 (H/PF4) antibodies using IgG-specific enzyme immunoassay (EIA) (Immucor) was strongly positive at 2.971 optical density (OD) units (normal range: <0.399 OD units).