Serial tissue polypeptide specific antigen determination in the followup of hormone treated carcinoma of the prostate.
OBJECTIVE
We determined the impact of serum cytokeratin-18-related tissue polypeptide specific antigen (TPS) in monitoring hormone treated carcinoma of the prostate.


METHODS
From 1991 to 1996, serial TPS and prostate specific antigen (PSA) determinations (3,882) in 443 hormone treated prostate carcinoma patients were correlated with the clinical course for a mean of 22 months.


RESULTS
Elevated TPS levels were significantly associated with disease progression in hormone treated stage M1 carcinoma of the prostate (p = 0.001), even in high grade, PSA negative tumors. Post-therapy TPS declines following second line therapy in hormone refractory prostate cancer patients (92) correlated significantly with subjective response (p = 0.001, PSA p = 0.02) and progression-free survival time (r(s) = -0.76, PSA r(s) = -0.32). A TPS decrease of more than 50% coincided with palliation in 90% of patients (PSA 64%) and predicted the best chance of a longer progression of free survival (p < 0.00005, PSA p = 0.036). Vice versa, rising TPS levels (more than 20%) coincided with subjective response in only 1 of 37 patients (PSA 9 of 33).


CONCLUSIONS
TPS may be a useful adjunct to PSA in monitoring hormone refractory, metastasized prostate cancer.
Kramer
G
G
Department of Urology, Institute for Medical Statistics, University of Vienna, Austria.
Steiner
G E
GE
Madersbacher
S
S
Stulnig
T
T
Lang
T
T
Marberger
M
M
D000368:Aged; D000369:Aged, 80 and over; D018931:Antineoplastic Agents, Hormonal / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000097:blood*; D018450:Disease Progression; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009919:Orchiectomy; D010455:Peptides / Q000097:blood*; D017430:Prostate-Specific Antigen / Q000097:blood*; D011471:Prostatic Neoplasms / Q000097:blood* / Q000401:mortality / Q000628:therapy; D015996:Survival Rate
D018931:Antineoplastic Agents, Hormonal; D014408:Biomarkers, Tumor; D010455:Peptides; C089984:tissue polypeptide specific antigen; D017430:Prostate-Specific Antigen