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F11R/JAM-A: why do platelets express a molecule which is also present in tight junctions?
Kamola, Piotr; Babinska, Anna; Przygodzki, Tomasz.
Afiliação
  • Kamola P; Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland.
  • Babinska A; Department of Medicine, State University of New York, Downstate Medical Center, Brooklyn, NY, USA.
  • Przygodzki T; Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland.
Platelets ; 34(1): 2214618, 2023 Dec.
Article em En | MEDLINE | ID: mdl-37246517
The molecule of a complex name F11R/JAM-A is a protein which was primarily discovered on blood platelets. Later, the presence of the same molecule was confirmed on endothelial cells and epithelial cells. From the moment of the discovery, most of the research was focused on the role of this protein in the latter types of cells. It was found to be an important element of so-called tight junctions. These structures are crucial for maintaining of integrity and selective permeability of cellular layers composed of these types of cells. In the following years, the presence of F11R/JAM-A has also been reported on leukocytes. An important role of specific type of leukocytes is their penetration to the sites of inflammation. Interplay of F11R/JAM-A present on endothelium and that on leukocyte is involved in this process. But what about the role of this protein in blood platelets where it was originally discovered? There is limited knowledge regarding this issue. It was found to play a role in the ability of platelets to adhere to a surface under static conditions, but it is not known if the same is true under flow. Is the protein necessary for platelets to aggregate and form thrombus? Genetically engineered mice were created which lack this protein in blood platelets to answer this question. These platelets were abnormally reactive, as it transpired that the protein plays a role of a negative regulator to one of the most important mechanisms, which triggers platelet aggregation. But is this inhibitory function the only task F11R/JAM-A has to fulfil in platelets? Presented review collects all the knowledge regarding this protein in blood platelets and tries to show interesting routes which need exploration.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Plaquetas / Molécula A de Adesão Juncional Limite: Humans Idioma: En Revista: Platelets Assunto da revista: HEMATOLOGIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Polônia

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Plaquetas / Molécula A de Adesão Juncional Limite: Humans Idioma: En Revista: Platelets Assunto da revista: HEMATOLOGIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Polônia