Germ-line alterations in MSR1 gene and prostate cancer risk.
OBJECTIVE
The MSR1 gene maps to 8p22-23, a novel susceptibility locus for hereditary prostate cancer (HPC). Mutations in MSR1 have been reported to associate with prostate cancer (PRCA) risk. Here we report a follow-up study from Finland to evaluate the association between PRCA and MSR1 gene.


METHODS
The youngest affected patient from each of 120 HPC families was initially used for the screening of MSR1 mutations by single-strand conformational polymorphism analysis. Selected variants of MSR1 gene were then screened in 537 unselected PRCA cases and in 480 controls.


RESULTS
Among 120 HPC families, five MSR1 sequence variants were identified. The carrier frequencies of the R293X, P275A, and -14743A>G variants were compared between the probands with HPC, unselected PRCA cases, and healthy male blood donors. No significant differences were observed. The odds ratios for R293X, P275A, and -14743A>G mutations were also calculated to estimate the PRCA risk. No significantly elevated or lowered risks for PRCA among these three variants were detected. However, the mean age at diagnosis of the R293X mutation carriers among HPC probands was significantly lower compared with noncarriers (55.4 versus 65.4 years; t test, P = 0.04). The same trend was observed among unselected PRCA cases (65.7 versus 68.7 years; t test, P = 0.37).


CONCLUSIONS
Our results do not support a major role for the MSR1 gene in the causation of hereditary or unselected PRCAs but suggest a possible modifying role in cancer predisposition.
Seppälä
Eija H
EH
Laboratory of Cancer Genetics, Institute of Medical Technology, University of Tampere, Finland. eija.seppala@uta.fi
Ikonen
Tarja
T
Autio
Ville
V
Rökman
Annika
A
Mononen
Nina
N
Matikainen
Mika P
MP
Tammela
Teuvo L J
TL
Schleutker
Johanna
J
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D002898:Chromosomes, Human, Pair 8 / Q000235:genetics; D015331:Cohort Studies; D005190:Family; D005387:Finland / Q000453:epidemiology; D018095:Germ-Line Mutation / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D011471:Prostatic Neoplasms / Q000235:genetics*; D011971:Receptors, Immunologic / Q000235:genetics*; D051116:Receptors, Scavenger; D012307:Risk Factors; D051117:Scavenger Receptors, Class A
C495139:MSR1 protein, human; D011971:Receptors, Immunologic; D051116:Receptors, Scavenger; D051117:Scavenger Receptors, Class A