title: Prevalence of fragile histidine triad expression in tumors from saudi arabia: a tissue microarray analysis.
abstract: OBJECTIVE
  The fragile histidine triad (FHIT) gene was discovered and proposed as a tumor suppressor gene for most human cancers. It encodes the most active common human chromosomal fragile region, FRA3B. We studied the prevalence of loss of FHIT expression in various tumors and correlated its loss with various clinicopathologic features.
  
  
  METHODS
  To determine whether the absence of FHIT expression correlates with clinical variables such as grade, stage, and survival time, we assessed FHIT expression using immunohistochemistry. More than 1,800 tumors from more than 75 tumor categories were analyzed by immunohistochemistry in a tissue microarray format.
  
  
  RESULTS
  Loss of FHIT expression ranged from 19% in ovarian tumors to 67% in lung cancers. Clinical and pathologic features like grade, stage, tumor size, and lymph node metastasis showed correlation with loss of FHIT expression in some tumors. No difference was seen in the survival patterns and loss of FHIT expression in any of the tumor groups studied.
  
  
  CONCLUSIONS
  Loss of FHIT expression is an ubiquitous event in the multistep, multifactorial carcinogenesis process. FHIT may be altered at different stages in different types of cancers. Most of the tumors with a wider prevalence of loss of FHIT expression as an early event show a correlation with clinicopathologic features. However, in some of the tumors, FHIT expression is lost as a late event and is only seen in a fraction of the tumors.
authors.affiliation: Research Centre at KFNCCC&R, King Faisal Specialist Hospital and Research Centre, MBC 98-16, P.O. Box 3354, Riyadh 11211, Saudi Arabia.
authors.forename: Prashant
authors.initials: P
authors.lastname: Bavi
authors.forename: Zeenath
authors.initials: Z
authors.lastname: Jehan
authors.forename: Valerie
authors.initials: V
authors.lastname: Atizado
authors.forename: Hassan
authors.initials: H
authors.lastname: Al-Dossari
authors.forename: Fouad
authors.initials: F
authors.lastname: Al-Dayel
authors.forename: Asmah
authors.initials: A
authors.lastname: Tulbah
authors.forename: Samir S
authors.initials: SS
authors.lastname: Amr
authors.forename: Salwa S
authors.initials: SS
authors.lastname: Sheikh
authors.forename: Adnan
authors.initials: A
authors.lastname: Ezzat
authors.forename: Hassan
authors.initials: H
authors.lastname: El-Solh
authors.forename: Shahab
authors.initials: S
authors.lastname: Uddin
authors.forename: Khawla
authors.initials: K
authors.lastname: Al-Kuraya
mesh_terms: D017766:Acid Anhydride Hydrolases / Q000032:analysis / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D016147:Genes, Tumor Suppressor; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis / Q000235:genetics*; D009369:Neoplasms / Q000235:genetics* / Q000473:pathology; D046888:Tissue Array Analysis / Q000379:methods*; D000099170:Bis(5'-adenosyl)triphosphatase
chemical_list: D017766:Acid Anhydride Hydrolases; D009363:Neoplasm Proteins; D000099170:Bis(5'-adenosyl)triphosphatase