Method to detect prostate cancer in a sample
First Claim
1. A method for determining a predisposition for developing prostate cancer or a presence of prostate cancer in a patient, said method comprising:
- (a) obtaining a crude urine sample from a patient, said crude urine sample comprising at least one prostate cell or nucleic acid extract thereof;
(b) performing an RNA hybridization and/or amplification reaction on mRNA contained in said crude urine sample, using a first oligonucleotide or first primer pair specific to a prostate cancer-specific PCA3 mRNA molecule which is;
(i) a polynucleotide molecule comprising the sequence of SEQ ID NO;
9, 10 or 13;
(ii) a polynucleotide molecule that hybridizes under high stringency conditions to (i), wherein said high stringency conditions comprise a hybridization at 65°
C. in 6×
SSC or 5×
SSPE, 5×
Denhardt'"'"'s solution, 0.5% SDS and 100 μ
g/ml denatured carrier DNA and a washing at 65°
C. in 0.2×
SSC/0.1% SDS;
or(iii) a polynucleotide molecule fully complementary to (i) or (ii);
(c) performing a second RNA hybridization and/or amplification reaction on mRNA contained in said crude urine sample, using a second oligonucleotide or second primer pair specific to a prostate-specific mRNA molecule;
(d) detecting said PCA3 mRNA molecule and said prostate-specific mRNA molecule; and
(e) determining, based on the presence or level of said prostate cancer-specific PCA3 mRNA molecule in said crude urine sample, that;
(1) said patient has prostate cancer or has a higher risk of developing prostate cancer when an elevated level of said prostate cancer-specific PCA3 mRNA molecule is detected, as compared to a level thereof associated with a normal or non-malignant prostate state;
or(2) said patient does not have prostate cancer or has a lower risk of developing prostate cancer when said prostate cancer-specific PCA3 mRNA molecule is not detected or is detected at a lower level, as compared to a level thereof associated with a normal or non-malignant prostate state, and when said prostate-specific mRNA molecule is detected, thereby validating the non detection or lower detection of said PCA3 mRNA molecule.
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Accused Products
Abstract
The present invention relates to prostate cancer. More specifically, the present invention relates to a method to detect prostate cancer in a patient sample by detecting the RNA encoded by the gene PCA3. More particularly the present invention relates to a method for determining a predisposition, or presence of prostate cancer in a patient comprising: (a) contacting a biological sample of a patient with at least one oligonucleotide that hybridizes to a PCA3 polynucleotide; (b) detecting in the biological sample an amount of PCA3 and second prostate specific polynucleotides; and (c) comparing the amount of PCA3 polynucleotide that hybridizes to the oligonucleotide to a predetermined cut off value, and therefrom determining the presence or absence of prostate cancer in the biological sample. The present invention further relates to diagnostic kits for the detection of prostate cancer or the risk of developing same in a patient comprising: (a) at least one container means having disposed therein at least one oligonucleotide probe or primer that hybridizes to one a PCA3 nucleic acid or complement thereof; (b) at least one oligonucleotide probe or primer that hybridizes with a second prostate specific nucleic acid or complement thereof; and (c) reagents enabling a detection of PCA3 and of the second prostate specific nucleic acid when PCA3 or second prostate-specific nucleic acid sequence is present.
82 Citations
19 Claims
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1. A method for determining a predisposition for developing prostate cancer or a presence of prostate cancer in a patient, said method comprising:
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(a) obtaining a crude urine sample from a patient, said crude urine sample comprising at least one prostate cell or nucleic acid extract thereof; (b) performing an RNA hybridization and/or amplification reaction on mRNA contained in said crude urine sample, using a first oligonucleotide or first primer pair specific to a prostate cancer-specific PCA3 mRNA molecule which is; (i) a polynucleotide molecule comprising the sequence of SEQ ID NO;
9, 10 or 13;(ii) a polynucleotide molecule that hybridizes under high stringency conditions to (i), wherein said high stringency conditions comprise a hybridization at 65°
C. in 6×
SSC or 5×
SSPE, 5×
Denhardt'"'"'s solution, 0.5% SDS and 100 μ
g/ml denatured carrier DNA and a washing at 65°
C. in 0.2×
SSC/0.1% SDS;
or(iii) a polynucleotide molecule fully complementary to (i) or (ii); (c) performing a second RNA hybridization and/or amplification reaction on mRNA contained in said crude urine sample, using a second oligonucleotide or second primer pair specific to a prostate-specific mRNA molecule; (d) detecting said PCA3 mRNA molecule and said prostate-specific mRNA molecule; and (e) determining, based on the presence or level of said prostate cancer-specific PCA3 mRNA molecule in said crude urine sample, that; (1) said patient has prostate cancer or has a higher risk of developing prostate cancer when an elevated level of said prostate cancer-specific PCA3 mRNA molecule is detected, as compared to a level thereof associated with a normal or non-malignant prostate state;
or(2) said patient does not have prostate cancer or has a lower risk of developing prostate cancer when said prostate cancer-specific PCA3 mRNA molecule is not detected or is detected at a lower level, as compared to a level thereof associated with a normal or non-malignant prostate state, and when said prostate-specific mRNA molecule is detected, thereby validating the non detection or lower detection of said PCA3 mRNA molecule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification