Elevated TGF-beta1 and decreased alpha2-M were consistently found in patients with PCa, and may be considered as risk factors for tumor development and progression. In comparison to PSA, the TGF-beta1 levels displayed a slow decline after radical prostatectomy; this indicates that TGF-beta1 is mainly produced outside the prostatic tissue. Since TGF-beta1 levels are influenced by the BMI, this indicates that PCa might be sensitive to diet.
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