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词条 Platelet alpha-granule
释义

  1. Contents

  2. Clinical significance

  3. See also

  4. References

{{Infobox anatomy
| Name = Alpha granule
| Latin = granulum alpha
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| Precursor =
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| PartOf = Platelets
}}Alpha granules (or α-granules) are a cellular component of platelets. Platelets contain different types of granules that perform different functions including alpha granules, dense granules, and lysosomes.[1] Of these alpha granules are the most common.[1] The term "alpha granules" is used to describe granules containing several growth factors.[2]

Contents

Contents include insulin-like growth factor 1, platelet-derived growth factors, TGFβ, platelet factor 4 (which is a heparin-binding chemokine) and other clotting proteins (such as thrombospondin, fibronectin, factor V,[3] and von Willebrand factor).[4]

The alpha granules express the adhesion molecule P-selectin[5] and CD63.[6] These are transferred to the membrane after synthesis.

The other type of granules within platelets are called dense granules.

Clinical significance

A deficiency of alpha granules is known as gray platelet syndrome.

See also

  • Dense granule
  • Platelet rich fibrin

References

1. ^{{cite journal | vauthors = Blair P, Flaumenhaft R | title = Platelet alpha-granules: basic biology and clinical correlates | journal = Blood Reviews | volume = 23 | issue = 4 | pages = 177–89 | date = July 2009 | pmid = 19450911 | pmc = 2720568 | doi = 10.1016/j.blre.2009.04.001 }}
2. ^{{cite journal | vauthors = Harrison P, Cramer EM | title = Platelet alpha-granules | journal = Blood Reviews | volume = 7 | issue = 1 | pages = 52–62 | date = March 1993 | pmid = 8467233 | doi = 10.1016/0268-960X(93)90024-X }}
3. ^{{cite journal |vauthors = Whiteheart SW |title=Platelet granules: surprise packages |journal=Blood |date=August 2011 |volume=118 |issue=5 |pages=1190–1191 |doi=10.1182/blood-2011-06-359836|pmid=21816838 }}
4. ^{{cite journal | vauthors = Nurden AT | title = Platelets, inflammation and tissue regeneration | journal = Thrombosis and Haemostasis | volume = 105 | issue = Suppl 1 | pages = S13–33 | date = May 2011 | pmid = 21479340 | doi = 10.1160/THS10-11-0720 | url = https://www.researchgate.net/publication/51038268 }}
5. ^{{cite book | first1 = Stuart H. | last1 = Orkin | first2 = David G. | last2 = Nathan | first3 = David | last3 = Ginsburg | first4 = A. Thomas | last4 = Look | name-list-format = vanc |title=Nathan and Oski's hematology of infancy and childhood|url=https://books.google.com/books?id=_9CmOIvgJm4C&pg=PA1386|access-date=2 November 2010|year=2009|publisher=Elsevier Health Sciences|isbn=978-1-4160-3430-8|pages=1386–}}
6. ^{{cite book | first1 = William B. | last1 = Coleman | first2 = Gregory J. | last2 = Tsongalis | name-list-format = vanc |title=Molecular pathology: the molecular basis of human disease|url=https://books.google.com/books?id=btloapOq85wC&pg=PA258|access-date=2 November 2010|year=2009|publisher=Academic Press|isbn=978-0-12-374419-7|pages=258–}}
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1 : Growth factors

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