NCBI Summary:
The protein encoded by this gene is the alpha component of fibrinogen, a blood-borne glycoprotein comprised of three pairs of nonidentical polypeptide chains. Following vascular injury, fibrinogen is cleaved by thrombin to form fibrin which is the most abundant component of blood clots. In addition, various cleavage products of fibrinogen and fibrin regulate cell adhesion and spreading, display vasoconstrictor and chemotactic activities, and are mitogens for several cell types. Mutations in this gene lead to several disorders, including dysfibrinogenemia, hypofibrinogenemia, afibrinogenemia and renal amyloidosis. Alternative splicing results in two isoforms which vary in the carboxy-terminus. [provided by RefSeq]
General function
Extracellular binding protein
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Cellular localization
Secreted
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Ovarian function
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Expression regulated by
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Ovarian localization
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A proteomic analysis of IVF follicular fluid in women Estes SJ et al. OBJECTIVE: To address the lack of predictors of IVF success by using proteomic biometrics. DESIGN: Experimental study of follicular fluid specimens from a prospective cohort of IVF patients. SETTING: Academic research laboratory and IVF program. PATIENT(S): Women or=11 oocytes and live birth (10 pairs). Year of cycle start and IVF down-regulation protocol were also matched. INTERVENTION(S): Follicular fluid was separated by two-dimensional polyacrylamide gel electrophoresis followed by Sypro Ruby staining and comparison with PDQuest software. Logistic regression was incorporated to calculate the likelihood of live birth in relation to the protein spot of interest. MAIN OUTCOME MEASURE(S): Protein markers. RESULT(S): Liquid chromatography-tandem mass spectrometry and searching of sequence databases revealed 11 potential protein candidates. Haptoglobin alpha, predominantly fetal expressed T1 domain, mitochondrial integrity genome (ATPase), apolipoprotein H (beta-2 glycoprotein I), dihydrolipoyl dehydrogenase, lyzozyme C, fibrinogen alpha-chain, and immunoglobulin heavy chain V-III (region BRO) were found to have increased expression in the live birth group, whereas antithrombin, vitamin D-binding protein, and complement 3 were decreased. An ELISA confirmed a significantly lower level of antithrombin. CONCLUSION(S): Proteomic evaluation of follicular fluid is able to identify potential biomarkers of good versus poor responders in matched pairs of IVF patients.