Ras effectors required for transformation depend on the species, the cell type, and the tumor stage. However, these findings may be confounded because they were mainly conducted in cultured cells and by using H-Ras, the least commonly mutated Ras gene, to transform cells. K-Ras is the predominantly mutated Ras family member, and activating mutations in K-Ras are associated primarily with malign...

BACKGROUND Scleroderma (systemic sclerosis; SSc) is a clinically heterogeneous and often lethal acquired disorder of the connective tissue that is characterized by vascular, immune/inflammatory and fibrotic manifestations. Tissue fibrosis is the main cause of morbidity and mortality in SSc and an unmet medical challenge, mostly because of our limited understanding of the molecular factors and s...

Renal artery stensosis (RAS) continues to be a problem for clinicians, with no clear consensus on how to investigate and assess the clinical significance of stenotic lesions and manage the findings. RAS caused by fibromuscular dysplasia is probably commoner than previously appreciated, should be actively looked for in younger hypertensive patients and can be managed successfully with angioplast...

In this study, we developed the Rorschach Alexithymia Scale (RAS) to be used with protocols scored with the Comprehensive System (CS; Exner, 1993). A total of 92 patients with medical disease and 127 psychiatric outpatients were administered the Rorschach and the 20-item Toronto Alexithymia Scale (Bagby, Parker, & Taylor, 1994a, 1994b). We used a systematic approach, including cross-validation,...

background: recurrent aphthous stomatitis (ras) is the most common inflammatory ulcerative condition of oral cavity. the aim of this study was to compare the levels of the salivary malondialdehyde (mda) and total antioxidant capacity (tac) and blood parameter in ras versus healthy controls. methods: this case-control study consisted of 28 patients with ras and 28 age and sex -matched control wi...

background: endometrial cancer is the most common gynecologic malignancy that has often proceeded by a premalignant phase. modern molecular and immune staining methods for precancerous lesions diagnosis have been expanded. one of the genetic alternations in the endometrial cancer carcinogenesis is the mutational activation of the k-ras oncogene. k-ras mutation has recognized to occur at an earl...

Writers’ identity (Ivanič, 1998) and positioning in written text have been studied under multiple terms. However, a clearer distinction should be made between writers’ (Hyland, 2005a) presence or voice (John, 2005). This paper explores how disseminators specialised writers adapt mediate the of researchers medical research articles (Med-RAs) corresponding popularizations published on-line (Med-E...

Renal artery stenosis (RAS) is associated with increased cardiovascular mortality and morbidity and may constitute a treatable cause of secondary hypertension. Fibromuscular dysplasia is frequently affecting children as the main cause of RAS, but is very rare in adults. We present the case of a 19-year-old overweight patient, with no known pathological conditions in her medical history or famil...

The renin-angiotensin system (RAS) is a critical regulator of sodium balance, extracellular fluid volume, vascular resistance, and, ultimately, arterial blood pressure. In the kidney, angiotensin II exerts its effects to conserve salt and water through a combination of the hemodynamic control of renal blood flow and glomerular filtration rate and tubular epithelial cell sodium chloride and wate...