Background
The determination of Acid Phosphatase ACP in seminal plasma was considered as an appropriate biochemical marker to evaluate prostate function , as recommended by the WHO manual. However, few reports on the standardization and quality control for the determination of biochemical markers in seminal plasma have been documented.
Methods
Two frozen samples of seminal plasma with or without phenylmethylsulfonyl fluoride were determined for their Acid Phosphatase (ACP) levels. The Acid Phosphatase level and sperm concentration of each of 72 samples of seminal plasma obtained at 1000×g for 10 min or 3000×g for 15 min centrifugation were assayed. Acid Phosphatase activity in 10 samples of seminal plasma was measured immediately or standing for 30 min after dilution. The ACP levels in seminal plasma with or without chymotrypsin were also assayed.
Results
There was no significant difference of ACP levels (P = 0.166) but of sperm concentrations (P = 0.000) in seminal plasma obtained by centrifugation at different velocity. ACP activities in seminal plasma measured when standing for 30 min after dilution were significantly lower than those measured immediately after dilution (P = 0.001). Both chymotrypsin and freezing–thawing had no apparent effect on the determination of ACP in seminal plasma.
Conclusion
The results indicated that standing time after dilution and centrifugation velocity should be standardized, and frozen seminal plasma could serve as the quality control products for the determination of ACP activity among different laboratories.
Department of Reproduction and Genetics, Jinling Hospital, School of Medicine, Nanjing University , Nanjing, Jiangsu 210002, China
Clinica Chimica Acta
Volume 375, Issues 1-2, January 2007, Pages 76-81
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Acid Phospatase
Acid phosphatase is a phosphatase, a type of enzyme, used to free attached phosphate groups from other molecules during digestion. Acid Phosphatase is basically a phospho homo esterase . Acid Phosphatase is stored in lysosomes and functions when these fuse with endosomes, which are acidified while they function; therefore, it has an acid pH optimum.
Different forms of acid phosphatase are found in different organs, and their serum levels are used as a diagnostic for disease in the corresponding organs. For example, elevated prostatic acid phosphatase levels may indicate the presence of prostate cancer.
Prostatic acid phosphatase (PAP) is an enzyme produced by the prostate. Acid phosphatase may be found in increased amounts in men who have prostate cancer or other diseases.
The highest levels of acid phosphatase are found in metastasized prostate cancer. Diseases of the bone, such as Paget's disease or hyperparathyroidism, diseases of blood cells, such as sickle-cell disease or multiple myeloma or lysosomal storage diseases, such as Gaucher's disease, will show moderately increased levels.
Different forms of acid phosphatase are found in different organs, and their serum levels are used as a diagnostic for disease in the corresponding organs. For example, elevated prostatic acid phosphatase levels may indicate the presence of prostate cancer.
Prostatic acid phosphatase (PAP) is an enzyme produced by the prostate. Acid phosphatase may be found in increased amounts in men who have prostate cancer or other diseases.
The highest levels of acid phosphatase are found in metastasized prostate cancer. Diseases of the bone, such as Paget's disease or hyperparathyroidism, diseases of blood cells, such as sickle-cell disease or multiple myeloma or lysosomal storage diseases, such as Gaucher's disease, will show moderately increased levels.
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