title: Influence of telomerase activity on bone and soft tissue tumors.
abstract: OBJECTIVE
  Telomeres consisting of a repeating nucleotide sequence (TTAGGG)n are shortened in normal somatic cells. Telomerase is an enzyme that elongates the telomere sequence and is detected in most human cancers and usually not in normal somatic cells. Little is known about telomerase activity in bone and soft tissue tumors. The aim of this study was to investigate the relationship between telomerase activity and clinical factors in bone and soft tissue tumors.
  
  
  METHODS
  Telomerase activity was measured using the modified telomeric repeat amplification protocol (TRAP) assay in 115 bone and soft tissue tumors obtained through open biopsy or resection.
  
  
  RESULTS
  Telomerase activity was detected in 10% of benign tumors and 44% of malignant tumors (p < 0.001). A higher incidence of telomerase activity was detected in high-grade tumors than in low-grade tumors (p = 0.002). The cumulative metastasis-free and overall survival in telomerase-positive patients was significantly worse than in telomerase-negative patients (p = 0.045 and p = 0.048).
  
  
  CONCLUSIONS
  Our study suggests that telomerase activity is associated with tumor aggressiveness and may be a useful parameter to predict the prognosis of patients with malignant bone and soft tissue tumors.
authors.affiliation: Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, 700 8558 Okayama, Japan.
authors.forename: Norifumi
authors.initials: N
authors.lastname: Umehara
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Ozaki
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Sugihara
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Kunisada
authors.forename: Yuki
authors.initials: Y
authors.lastname: Morimoto
authors.forename: Akira
authors.initials: A
authors.lastname: Kawai
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Nishida
authors.forename: Aki
authors.initials: A
authors.lastname: Yoshida
authors.forename: Takuro
authors.initials: T
authors.lastname: Murakami
authors.forename: Hajime
authors.initials: H
authors.lastname: Inoue
mesh_terms: D000293:Adolescent; D000328:Adult; D014408:Biomarkers, Tumor / Q000378:metabolism*; D001859:Bone Neoplasms / Q000201:enzymology*; D002648:Child; D018572:Disease-Free Survival; D005260:Female; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012983:Soft Tissue Neoplasms / Q000201:enzymology*; D016019:Survival Analysis; D019098:Telomerase / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D019098:Telomerase