Complement Activation in Fish with Emphasis on MBL/MASP
Publikation: Bidrag til bog/antologi/rapport › Bidrag til bog/antologi › Forskning › fagfællebedømt
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Complement Activation in Fish with Emphasis on MBL/MASP. / Kania, Per; Buchmann, Kurt.
Principles of Fish Immunology: From Cells and Molecules to Host Protection. Bind 1 Springer, 2022. s. 279-300.Publikation: Bidrag til bog/antologi/rapport › Bidrag til bog/antologi › Forskning › fagfællebedømt
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TY - CHAP
T1 - Complement Activation in Fish with Emphasis on MBL/MASP
AU - Kania, Per
AU - Buchmann, Kurt
N1 - Edited by Kurt Buchmann and Christopher J. Secombes
PY - 2022
Y1 - 2022
N2 - The complement system in fish consists of a series of proteins interacting with both the innate and the adaptive immune systems. These distinct plasma proteins sequentially react with one another whereby they eventually directly kill the pathogens. The system is activated by binding of complement factors to surfaces of invading pathogens. During this process, complement factors and their cleavage products may opsonize invading microorganisms, induce a series of inflammatory responses and finally kill the pathogens. Activation of the complement system may take place through three pathways called the classical pathway (CP), the alternative pathway (AP) and the mannan-binding pathway (or lectin pathway) (LP). These activation routes depend on the different molecules acting in the initiation of the sequential reactions but they all converge to activate the same central effector molecule, C3. This is achieved by formation of a C3 convertase. Activation of C3 leads to the formation of two fragments C3a (an important factor, together with C5a, for inducing inflammation via its effect as an anaphylatoxin) and C3b which facilitates phagocytosis via its function as an opsonin. Activation of C3 also leads to the formation of a C5-convertase, leading to the assembly of the terminal C5b-C9 complex, otherwise termed the membrane attack complex (MAC). The MAC creates pores in the membrane of the invading pathogen, eventually leading to their cell-lysis and death.
AB - The complement system in fish consists of a series of proteins interacting with both the innate and the adaptive immune systems. These distinct plasma proteins sequentially react with one another whereby they eventually directly kill the pathogens. The system is activated by binding of complement factors to surfaces of invading pathogens. During this process, complement factors and their cleavage products may opsonize invading microorganisms, induce a series of inflammatory responses and finally kill the pathogens. Activation of the complement system may take place through three pathways called the classical pathway (CP), the alternative pathway (AP) and the mannan-binding pathway (or lectin pathway) (LP). These activation routes depend on the different molecules acting in the initiation of the sequential reactions but they all converge to activate the same central effector molecule, C3. This is achieved by formation of a C3 convertase. Activation of C3 leads to the formation of two fragments C3a (an important factor, together with C5a, for inducing inflammation via its effect as an anaphylatoxin) and C3b which facilitates phagocytosis via its function as an opsonin. Activation of C3 also leads to the formation of a C5-convertase, leading to the assembly of the terminal C5b-C9 complex, otherwise termed the membrane attack complex (MAC). The MAC creates pores in the membrane of the invading pathogen, eventually leading to their cell-lysis and death.
U2 - 10.1007/978-3-030-85420-1_9
DO - 10.1007/978-3-030-85420-1_9
M3 - Book chapter
SN - 978-3-030-85419-5
VL - 1
SP - 279
EP - 300
BT - Principles of Fish Immunology
PB - Springer
ER -
ID: 308376470