TY - JOUR
T1 - Conformationally altered hyaluronan restricts complement classical pathway activation by binding to C1q, C1r, C1s, C2, C5 and C9, and suppresses WOX1 expression in prostate DU145 cells
AU - Hong, Qunying
AU - Kuo, Emory
AU - Schultz, Lori
AU - Boackle, Robert J.
AU - Chang, Nan Shan
PY - 2007/1
Y1 - 2007/1
N2 - Linear non-sulfated hyaluronan (HA) does not bind complement proteins yet inhibits their hemolytic function. We have previously induced the complement inhibitory function of HA by heat treatment. However, heated HA readily loses its anti-complementary activity probably due to instantaneous interchain re-association. Here, HA solutions were heated and then freeze-dried. Compared to native HA, heated/freeze-dried HA stably restricted serum complement-mediated hemolysis via the classical pathway, in which serum C1 hemolytic function and C3 activation were blocked. Also, treated HA had a significantly increased binding of component C1q, C1r, C1s, C2, C5, C9, P, D and H. Further, when HA was gelfractionated by electrophoresis and then freeze-dried, its anti-complementary activity was stably induced. Both native and heated/freeze-dried HA stimulated ERK phosphorylation in prostate DU145 cells. However, treated HA suppressed the expression of tumor suppressors WOX1 and WOX2. Together, HA with an altered conformation stabilizes its inhibition and binding of complement proteins. It may recognize cell surface receptors differently from native HA, thereby differentially regulating the expression of cellular proteins.
AB - Linear non-sulfated hyaluronan (HA) does not bind complement proteins yet inhibits their hemolytic function. We have previously induced the complement inhibitory function of HA by heat treatment. However, heated HA readily loses its anti-complementary activity probably due to instantaneous interchain re-association. Here, HA solutions were heated and then freeze-dried. Compared to native HA, heated/freeze-dried HA stably restricted serum complement-mediated hemolysis via the classical pathway, in which serum C1 hemolytic function and C3 activation were blocked. Also, treated HA had a significantly increased binding of component C1q, C1r, C1s, C2, C5, C9, P, D and H. Further, when HA was gelfractionated by electrophoresis and then freeze-dried, its anti-complementary activity was stably induced. Both native and heated/freeze-dried HA stimulated ERK phosphorylation in prostate DU145 cells. However, treated HA suppressed the expression of tumor suppressors WOX1 and WOX2. Together, HA with an altered conformation stabilizes its inhibition and binding of complement proteins. It may recognize cell surface receptors differently from native HA, thereby differentially regulating the expression of cellular proteins.
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U2 - 10.3892/ijmm.19.1.173
DO - 10.3892/ijmm.19.1.173
M3 - Article
C2 - 17143562
AN - SCOPUS:39049194606
SN - 1107-3756
VL - 19
SP - 173
EP - 179
JO - International journal of molecular medicine
JF - International journal of molecular medicine
IS - 1
ER -