Value of cardiac troponin I measurement in prediction of anthracycline-induced cardiotoxicity in breast cancer patients / 南方医科大学学报

<p><b>OBJECTIVE</b>To evaluate the value of cardiac troponin I (CTnI) measurement in predicting anthracycline-induced cardiotoxicity in patients with breast cancer.</p><p><b>METHODS</b>This study was conducted among 186 breast cancer patients receiving anthracycline-based chemotherapy. Serum cTnI concentrations before and after each cycle of the chemotherapy and the left ventricular ejection fraction (LVEF) before and at the 2nd, 4th and 6th months of the treatment were recorded. According to serum cTnI concentration, the patients were divided into CTnI+ group (with serum CTnI concentration of no less than 0.1 ng/ml, n=60) and CTnI- (<0.1 ng/ml) group (n=126).</p><p><b>RESULTS</b>No patients in this series experienced cardiac heart failure (CHF). The number of patients with a LVEF reduction by over 10% from the baseline was 16 (26.7%) in CTnI+ group, as compared to 7 (5.6%) in CTnI- group, showing a significant difference between the two groups (P<0.01).</p><p><b>CONCLUSION</b>CTnI can be a useful marker for early prediction of anthracycline-induced cardiotoxicity in patients with breast cancer.</p>

Cyclin D1 overexpression in esophageal cancer from southern China and its clinical significance.

Little reports showed cyclin D1 changes in esophageal cancer from southern China. In this study, we detected cyclin D1 expression in esophageal carcinomas from southern China 61% and 35% cases showed increased expression of cyclin D1 in esophageal carcinomas and the adjacent epithelia, respectively. Significant difference for cyclin D1 expression was found between esophageal carcinomas and the adjacent epithelia. Comparing cyclin D1 expression in the carcinomas at different stages, we found significant alterations. The results suggested that cyclin D1 was involved in the earlier event and accumulated as the cancer evolved to a later stage in some esophageal carcinomas.

Effects of MT1-MMP on the in vitro invasiveness of breast cancer cells / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the effect of membrane type-1 matrix metalloproteinase (MTI-MMP) on the invasive potential of breast cancer cell and analyze its mechanisms.</p><p><b>METHODS</b>After treatment of breast cancer MDA-MB-453 cell line with concanavalin A ( ConA, 20 microg/ml) for 24 h, MT1-MMP protein was detected in cancer cells by Western analysis and immunocytochemistry. MDA-MB-453 cells were cultured with exogenous latent proMMP-2 and MMP-2 activity was analyzed by gelatin zymography. The invasive potential of the tumor cells was measured with a membrane invasion culture system. Cancer cells of the cell line were divided into four groups: the control group treated by neither reagent, group ConA was only treated by ConA, group MMP-2 was treated only by MMP-2, and group ConA + MMP-2 was treated by both ConA and MMP-2. RESULTS The expression of MTI-MMP protein could be detected in groups ConA and ConA + MMP-2, but nothing was detected in control and group MMP-2. There was only 72 000 precursor form of MMP-2 in group MMP-2 and there were both 72 000 precursor form and 64 000 active enzyme form of MMP-2 in group ConA + MMP-2, but there was no forms of MMP-2 in the other two groups detected by gelatin zymography. The largest amount of cells penetrated through Matrigel was observed in group ConA + MMP-2 than in the other three groups.</p><p><b>CONCLUSION</b>MTI-MMP can remarkably promote the invasive potential of breast cancer cells mainly through its ability of activating latent proMMP-2 to degrade</p>