Abstract：
PURPOSE:The aim of this study was to investigate the putative changes in serum angiotensinase activities (aminopeptidase N, APN; aminopeptidase B, APB; aminopeptidase A, APA; aspartyl aminopeptidase, ASAP) involved in the renin-angiotensin system (RAS) in women with breast cancer treated or not with a neoadjuvant therapy of paclitaxel and anthracycline and in healthy women volunteers. METHODS:We fluorometrically analysed serum APN, APB, APA and ASAP activities using their corresponding aminoacyl-β-naphthylamides as substrates in women with breast cancer treated with a neoadjuvant therapy of paclitaxel and anthracycline. RESULTS:When compared with healthy controls, women with breast cancer not treated with neoadjuvant chemotherapy, showed a decrease in angiotensinase activity, which support the putative increase of angiotensin II (Ang II) levels, indicating that the tumour process would favour the development of the disease. Also, an increase in APN and APB activities was observed, which support a role for angiotensin IV (Ang IV). In women treated with a neoadjuvant therapy, we described an increase in ASAP and APA activities, supporting the idea that this treatment increases Ang II catabolism. The resulting decrease in Ang II level could lead to an inhibition of the tumour growth. CONCLUSION:Present results show changes in serum angiotensinase activities in women with breast cancer and in women with breast cancer treated with a neoadjuvant therapy of paclitaxel and anthracycline. Therefore, considerable attention should be focused on the development of RAS blockade therapy as a new strategy for breast cancer treatment.
journal_name
Maturitasjournal_title
Maturitasauthors
Ramírez-Expósito MJ,Carrera-González Mdel P,Mayas MD,Dueñas B,Martínez-Ferrol J,Martínez-Martos JMdoi
10.1016/j.maturitas.2012.02.007subject
Has Abstractpub_date
2012-05-01 00:00:00pages
79-83issue
1eissn
0378-5122issn
1873-4111pii
S0378-5122(12)00094-1journal_volume
72pub_type
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