Cellular and molecular responses in progressive pseudorheumatoid dysplasia articular cartilage associated with compound heterozygous WISP3 gene mutation.
Progressive pseudorheumatoid dysplasia (PPD) is characterized by continuous degeneration and loss of articular cartilage, which has been attributed to mutations in the gene encoding WISP3. We collected a PPD family and analyzed their WISP3 genes mutation. Articular chondrocytes (ACs) were purified from the femurs of a PPD patient after hip replacement surgery. Cell growth, proliferation, and viability were examined. Gene expression profiling and analyses of matrix metalloproteinases (MMP)-1, -3, and -13 proteins were carried out using cDNA differential microarrays, real-time reverse transcriptase-polymerase chain reaction (RT-PCR), immunohistochemistry, and Western blot analysis. We found that two probands carried a deletion (840delT) mutation in maternal allele, which leads to truncated WISP3 protein missing 43 residues in C terminus; and a 1000T>C substitution in paternal allele, which was also passed on to four other members in the PPD kindred. PPD ACs were heterogeneous in size with an enhanced rate of cell proliferation and viability compared with the normal ACs. MMP-1, -3, and -13 mRNA expressions were dereased in PPD ACs. MMP-1, -3, and -13 protein levels, however, were increased in cell lysates from PPD ACs, but markedly decreased in the supernatants from cultured ACs. WISP3 mRNA expression in PPD ACs was also decreased. Our results show, for the first time, a compound heterozygous mutation of WISP3 and a series of cellular and molecular changes disturbing the endochondral ossification in this PPD patient.
Zhou
Hou-De
HD
Institute of Endocrinology and Metabolism, The Second Xiang-Ya Hospital of Central South University, 139# Mid-RenMin Road, Changsha, Hunan, 410011, China.
Bu
Yan-Hong
YH
Peng
Yi-Qun
YQ
Xie
Hui
H
Wang
Min
M
Yuan
Lin-Qing
LQ
Jiang
Yi
Y
Li
Duo
D
Wei
Qi-You
QY
He
Yu-Ling
YL
Xiao
Tao
T
Ni
Jiang-Dong
JD
Liao
Er-Yuan
EY
D000328:Adult; D015152:Blotting, Northern; D015153:Blotting, Western; D055511:CCN Intercellular Signaling Proteins; D002358:Cartilage, Articular / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000473:pathology; D049109:Cell Proliferation; D002478:Cells, Cultured; D019902:Chondrocytes / Q000378:metabolism / Q000473:pathology; D004252:DNA Mutational Analysis; D018450:Disease Progression; D005260:Female; D020022:Genetic Predisposition to Disease; D006579:Heterozygote; D006801:Humans; D007150:Immunohistochemistry; D018969:Insulin-Like Growth Factor Binding Proteins / Q000235:genetics* / Q000378:metabolism; D020781:Matrix Metalloproteinase 1 / Q000378:metabolism; D053509:Matrix Metalloproteinase 13 / Q000378:metabolism; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism; D009154:Mutation; D010009:Osteochondrodysplasias / Q000000981:diagnostic imaging / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011859:Radiography; D020133:Reverse Transcriptase Polymerase Chain Reaction
D055511:CCN Intercellular Signaling Proteins; C400081:CCN6 protein, human; D018969:Insulin-Like Growth Factor Binding Proteins; D012333:RNA, Messenger; D053509:Matrix Metalloproteinase 13; D020778:Matrix Metalloproteinase 2; D020781:Matrix Metalloproteinase 1