Hyaluronan synthase expression in pleural malignant mesotheliomas.
Hyaluronan (HA) is thought to play several important roles in tumor growth, tumorigenicity, and tumor dissemination and metastasis. Recently, three isoforms of hyaluronan synthase (HAS) have been cloned. Our objective was to determine which of the HAS isoforms were expressed in pleural malignant mesotheliomas, the most representative lesion of HA-producing tumors. We studied 10 cases of pleural malignant mesothelioma using novel antibodies of HAS. We compared HAS expression patterns of mesothelioma and pulmonary adenocarcinoma. Immunohistochemically, 9 of 10 (90%) cases of mesothelioma had extensive reaction to anti-HAS1 and anti-HAS2 antibodies, while HAS3 overexpression was present in 4 of 10 cases (40%). Of 20 cases of pulmonary adenocarcinoma, 5 overexpressed HAS1 (25%), 16 of 20 HAS2 (80%), and 4 of 20 HAS3 (20%). The expression level of HAS1 was significantly higher in mesotheliomas than in pulmonary adenocarcinoma (P=0.0036). Our data suggests that HAS1 might be a useful positive marker of malignant mesothelioma. However, a definitive conclusion should be based on further large-scale studies.
Kanomata
Naoki
N
Pathology Division, National Cancer Center Research Institute East, 6-5-1 Kashiwanoha, 277-8577 Kashiwa, Chiba, Japan.
Yokose
Tomoyuki
T
Kamijo
Tomoyuki
T
Yonou
Hiroyuki
H
Hasebe
Takahiro
T
Itano
Naoki
N
Kimata
Koji
K
Ochiai
Atsushi
A
D000230:Adenocarcinoma / Q000201:enzymology; D000368:Aged; D015415:Biomarkers / Q000032:analysis; D005260:Female; D014453:Glucuronosyltransferase / Q000096:biosynthesis*; D006801:Humans; D000076002:Hyaluronan Synthases; D007150:Immunohistochemistry; D007527:Isoenzymes / Q000096:biosynthesis*; D008297:Male; D008654:Mesothelioma / Q000201:enzymology*; D008875:Middle Aged; D010997:Pleural Neoplasms / Q000201:enzymology*
D015415:Biomarkers; D007527:Isoenzymes; D014453:Glucuronosyltransferase; D000076002:Hyaluronan Synthases
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