Breast cancer is a heterogeneous disease comprising the estrogen receptor (ER)–positive luminal subtype which is subdivided into luminal A and luminal B and ER-negative breast cancer which includes the triple-negative subtype. This study has four aims: 1) to examine whether Minichromosome Maintenance (MCM)2, MCM4, and MCM6 can be used as markers to differentiate between luminal A and luminal B subtypes; 2) to study whether MCM2, MCM4, and MCM6 are highly expressed in triple-negative breast cancer, as there is an urgent need to search for surrogate markers in this aggressive subtype, for drug development purposes; 3) to compare the prognostic values of these markers in predicting relapse-free survival; and 4) to compare the three approaches used for scoring the protein expression of these markers by immunohistochemistry (IHC). MCM2, MCM4, MCM6, and MKI67 mRNA expression was first studied using
in silico
analysis of available breast cancer datasets. We next used IHC to evaluate their protein expression on tissue microarrays using three scoring methods. MCM2, MCM4, and MCM6 can help in distinction between luminal A and luminal B whose therapeutic management and clinical outcomes are different. MCM2, MCM4, MCM6, and Ki-67 are highly expressed in breast cancer of high histological grades that comprise clinically aggressive tumors such as luminal B, HER2-positive, and triple-negative subtypes. Low transcript expression of these markers is associated with increased probability of relapse-free survival. A positive relationship exists among the three scoring methods of each of the four markers. An independent validation cohort is needed to confirm their clinical utility.
Obesity enhances BC extravasation by modifying the endothelium. To investigate the effects of obesity on cancer extravasation, we used a syngeneic BC cell line derived from the C57BL6 mouse mammary tumor virus-polyoma middle T antigen (MMTV-PyMT) model combined with a diet-induced obesity (DIO) model. Wild type (WT) C57BL6 female mice were enrolled on a low-fat (LF) (10% kcal) or high-fat (HF) (60% kcal) diet for 15 weeks (Fig. 1a,b) 10 , followed by tail vein injection of fluorescently labeled BC cells
This article explores the ways in which people cope with social and clinical dimensions of their chronic conditions. Existing literature was reviewed to categorize factors identified as being key. They were sorted into six groupings which are reflected by the acronym THRIVE: therapeutic interventions, habit and routine, relational-social, individual differences, values and beliefs, and emotional factors. We found little evidence to suggest different conditions prompt unique coping responses; rather, a range of common factors were observed across diverse conditions. The THRIVE framework not only summarizes current literature but provides a starting point for further research and development of future interventions.
Warfarin dose/week was significantly influenced by the combined MDR1 C3435T and EPHX1 H139R gene polymorphism since no polymorphism of PZ A-13G SNP was detected in our studied Egyptian population. Future studies with larger sample size will be needed to confirm our findings before definitive conclusions can be made.
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