TY - JOUR
T1 - Factor XIII-A
T2 - An Indispensable “Factor” in Haemostasis and Wound Healing
AU - Alshehri, Fahad Saeed M
AU - Whyte, Claire
AU - Mutch, Nicola
N1 - Author Contributions: F.S.M.A. wrote the manuscript; C.S.W. supervised the research and wrote the manuscript; N.J.M. supervised the research and wrote the manuscript. All authors have read and agreed to the published version of the manuscript.
Funding: Fahad S.M. Alshehri is supported by Royal Embassy of Saudi Arabia Cultural Bureau (KFMCS74). Claire S. Whyte and Nicola J. Mutch were supported by the British Heart Foundation project grants (PG/15/82/31721 and PG/20/17/35050).
Acknowledgments: All figures were prepared with https://biorender.com/ (accessed on 16 March 2021).
PY - 2021/3/17
Y1 - 2021/3/17
N2 - Factor XIII (FXIII) is a transglutaminase enzyme that catalyses the formation of ε-(γ-glutamyl)lysyl isopeptide bonds into protein substrates. The plasma form, FXIIIA2B2, has an established function in haemostasis, with fibrin being its principal substrate. A deficiency in FXIII manifests as a severe bleeding diathesis emphasising its crucial role in this pathway. The FXIII-A gene (F13A1) is expressed in cells of bone marrow and mesenchymal lineage. The cellular form, a homodimer of the A subunits denoted FXIII-A, was perceived to remain intracellular, due to the lack of a classical signal peptide for its release. It is now apparent that FXIII-A can be externalised from cells, by an as yet unknown mechanism. Thus, three pools of FXIII-A exist within the circulation: plasma where it circulates in complex with the inhibitory FXIII-B subunits, and the cellular form encased within platelets and monocytes/macrophages. The abundance of this transglutaminase in different forms and locations in the vasculature reflect the complex and crucial roles of this enzyme in physiological processes. Herein, we examine the significance of these pools of FXIII-A in different settings and the evidence to date to support their function in haemostasis and wound healing
AB - Factor XIII (FXIII) is a transglutaminase enzyme that catalyses the formation of ε-(γ-glutamyl)lysyl isopeptide bonds into protein substrates. The plasma form, FXIIIA2B2, has an established function in haemostasis, with fibrin being its principal substrate. A deficiency in FXIII manifests as a severe bleeding diathesis emphasising its crucial role in this pathway. The FXIII-A gene (F13A1) is expressed in cells of bone marrow and mesenchymal lineage. The cellular form, a homodimer of the A subunits denoted FXIII-A, was perceived to remain intracellular, due to the lack of a classical signal peptide for its release. It is now apparent that FXIII-A can be externalised from cells, by an as yet unknown mechanism. Thus, three pools of FXIII-A exist within the circulation: plasma where it circulates in complex with the inhibitory FXIII-B subunits, and the cellular form encased within platelets and monocytes/macrophages. The abundance of this transglutaminase in different forms and locations in the vasculature reflect the complex and crucial roles of this enzyme in physiological processes. Herein, we examine the significance of these pools of FXIII-A in different settings and the evidence to date to support their function in haemostasis and wound healing
KW - Factor XIII-A
KW - transglutaminase
KW - cross-linking
KW - cellular FXIII-A
KW - haemostasis
KW - wound healing
UR - http://www.scopus.com/inward/record.url?scp=85102577160&partnerID=8YFLogxK
U2 - 10.3390/ijms22063055
DO - 10.3390/ijms22063055
M3 - Article
C2 - 33802692
VL - 22
JO - International Journal of Molecular Sciences
JF - International Journal of Molecular Sciences
SN - 1422-0067
IS - 6
M1 - 3055
ER -