Evaluation of tartrate-resistant acid phosphatase (TRACP) 5b as bone resorption marker in irradiated bone metastases. 2005

Stephan Mose, and Christian Menzel, and Andreas A Kurth, and Kirstin Obert, and Ulla Ramm, and Klaus Eberlein, and Heinz D Boettcher, and Uwe Pichlmeier
Department of Radiooncology, Stiftung Friedrichsheim, Johann Wolfgang Goethe-University Hospital Frankfurt Main, Theodor-Stern Kai 7, D-60590 Frankfurt/Main, Germany. stephan.mose@sbk-vs.de

BACKGROUND The aim of our study was to evaluate if the determination of the active isoform 5b of tartrate-resistant acid phosphatase (TRACP 5b) provides the possibility to monitor the effect of local radiotherapy in bone metastases and if TRACP 5b will predict further osseous progression. METHODS In 48 breast cancer patients with bone metastases, patients' characteristics, diagnostic imaging and laboratory investigation, tumor- and therapy-related parameters were registered at the beginning and the end of radiotherapy, as well as 6 and 12 weeks afterwards. TRACP 5b activity was measured using a solid phase immunofixed enzyme activity assay with the monoclonal antibody O1A. RESULTS During follow-up, progression in another part of the skeleton was diagnosed in 31 patients (65%). There was a significant decrease of TRACP 5b in patients without progression in non-irradiated regions, whereas in progressive disease, TRACP 5b levels remained stable with a slightly increasing tendency (p < 0.007). In patients with < or =3 metastases, all TRACP 5b values were significantly lower than the values of those with >3 metastases (p = 0.01). CONCLUSIONS In patients without further osseous progression, TRACP 5b is able to monitor the effectiveness of local radiotherapy. The estimation of sensitivity and specificity based on each TRACP 5b value demonstrates that the ability to discriminate between those patients with or without osseous progression increases with time.

UI MeSH Term Description Entries
D007527 Isoenzymes Structurally related forms of an enzyme. Each isoenzyme has the same mechanism and classification, but differs in its chemical, physical, or immunological characteristics. Alloenzyme,Allozyme,Isoenzyme,Isozyme,Isozymes,Alloenzymes,Allozymes
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008991 Monitoring, Physiologic The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine. Patient Monitoring,Monitoring, Physiological,Physiologic Monitoring,Monitoring, Patient,Physiological Monitoring
D010146 Pain An unpleasant sensation induced by noxious stimuli which are detected by NERVE ENDINGS of NOCICEPTIVE NEURONS. Suffering, Physical,Ache,Pain, Burning,Pain, Crushing,Pain, Migratory,Pain, Radiating,Pain, Splitting,Aches,Burning Pain,Burning Pains,Crushing Pain,Crushing Pains,Migratory Pain,Migratory Pains,Pains, Burning,Pains, Crushing,Pains, Migratory,Pains, Radiating,Pains, Splitting,Physical Suffering,Physical Sufferings,Radiating Pain,Radiating Pains,Splitting Pain,Splitting Pains,Sufferings, Physical
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D001859 Bone Neoplasms Tumors or cancer located in bone tissue or specific BONES. Bone Cancer,Cancer of Bone,Cancer of the Bone,Neoplasms, Bone,Bone Neoplasm,Neoplasm, Bone
D001862 Bone Resorption Bone loss due to osteoclastic activity. Bone Loss, Osteoclastic,Osteoclastic Bone Loss,Bone Losses, Osteoclastic,Bone Resorptions,Loss, Osteoclastic Bone,Losses, Osteoclastic Bone,Osteoclastic Bone Losses,Resorption, Bone,Resorptions, Bone
D001943 Breast Neoplasms Tumors or cancer of the human BREAST. Breast Cancer,Breast Tumors,Cancer of Breast,Breast Carcinoma,Cancer of the Breast,Human Mammary Carcinoma,Malignant Neoplasm of Breast,Malignant Tumor of Breast,Mammary Cancer,Mammary Carcinoma, Human,Mammary Neoplasm, Human,Mammary Neoplasms, Human,Neoplasms, Breast,Tumors, Breast,Breast Carcinomas,Breast Malignant Neoplasm,Breast Malignant Neoplasms,Breast Malignant Tumor,Breast Malignant Tumors,Breast Neoplasm,Breast Tumor,Cancer, Breast,Cancer, Mammary,Cancers, Mammary,Carcinoma, Breast,Carcinoma, Human Mammary,Carcinomas, Breast,Carcinomas, Human Mammary,Human Mammary Carcinomas,Human Mammary Neoplasm,Human Mammary Neoplasms,Mammary Cancers,Mammary Carcinomas, Human,Neoplasm, Breast,Neoplasm, Human Mammary,Neoplasms, Human Mammary,Tumor, Breast
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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