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Activin A circulating levels in patients with bone metastasis from breast or prostate cancer

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Abstract

Recent studies have highlighted that Activin A, a member of the transforming growth factor-β (TGF-β) superfamily, may be involved in the regulation of osteoblastic activity and in osteoclast differentiation. Therefore, we have investigated the clinical significance of its circulating levels in patients with bone metastasis. Activin A serum concentrations were determined, by a commercially available enzyme-linked immunosorbent assay kit, in 72 patients with breast cancer (BC) or prostatic cancer (PC) with (BM+) or without (BM−) bone metastases, in 15 female patients with age-related osteoporosis (OP), in 20 patients with benign prostatic hypertrophy (BPH) and in 48 registered healthy blood donors (HS) of both sex (25 female and 23 male). Activin A serum concentrations were significantly increased in BC or PC patients as compared to OP (P < 0.0001) or BPH (P = 0.045), respectively, or to sex matched HS (P < 0.0001). Additionally, these levels resulted more elevated in PC patients as compared to BC patients (P = 0.032). Interestingly, Activin A was significantly higher in BM+ patients than in BM− patients (BC, P = 0.047; PC, P = 0.016). In BC patients, a significant correlation was observed only between Activin A and number of bone metastases (P = 0.0065) while, in PC patients, Activin A levels were strongly correlated with the Gleason score (P = 0.011) or PSA levels (P = 0.0001) and, to a lessen extent, with the number of bone metastases (P = 0.056). Receiver operating characteristic curve (ROC) analysis showed a fair diagnostic accuracy of Activin A to discriminate between BM+ and BM− patients (BC: AUC = 0.71 ± 0.09, P = 0.03; PC: AUC = 0.73 ± 0.081, P = 0.005). These findings indicate that Activin A may be implicated in the pathogenesis of bone metastasis. Therefore, this cytokine may be considered a novel potential target for a more selective therapeutic approach in the treatment of skeletal metastasis and may be also useful as additional biochemical marker of metastatic bone disease.

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Abbreviations

AUC:

Area under the curve

BC:

Breast cancer

BPH:

Benign prostatic hypertrophy

BM+:

Bone metastasis

BM−:

No metastasis

ELISA:

Enzyme-linked immunosorbent assay

HS:

Healthy subjects

OP:

Primary osteoporosis

PC:

Prostate cancer

PSA:

Prostate specific antigen

ROC:

Receiver operating characteristic curve

TGF-β:

Transforming growth factor-β

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Acknowledgement

This work was supported, in part, by funds (ex quota 60%) from Italian Ministry of Education, University and Research (MIUR).

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Correspondence to Gaetano Leto.

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Leto, G., Incorvaia, L., Badalamenti, G. et al. Activin A circulating levels in patients with bone metastasis from breast or prostate cancer. Clin Exp Metastasis 23, 117–122 (2006). https://doi.org/10.1007/s10585-006-9010-5

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  • DOI: https://doi.org/10.1007/s10585-006-9010-5

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