Although substantial evidence supports a critical role for the activation of Raf-1 and mitogen-activated protein kinases (MAPKs) in oncogenic Ras-mediated transformation, recent evidence suggests that Ras may activate a second signaling pathway which involves the Ras-related proteins Rac1 and RhoA. Consequently, we used three complementary approaches to determine the contribution of Rac1 and Rh...

The study of fluctuations in the incidence neoplasms children give us a possibility to identify critical periods adaptation oncogenic environmental factors at stages ontogenesis. This provides additional opportunities for development prevention measures childhood malignant neoplasms.

High-risk human papillomaviruses (HR-HPVs) cause mucosal epithelial malignancies, most notably cervical intraepithelial neoplasia (CIN) and cancer of the uterine cervix. Prophylactic vaccines based on the L1 capsid proteins of the most prevalent HR-HPV types have been commercialized, and recent studies have shown that crossneutralization epitopes are present in the L2 minor capsid protein of HR...

In the past there was much speculation as to the existence of tumor antigens because the molecular etiology of cancer was a mystery. The molecular changes associated with malignant transformation have now either been defined or are definable by current methods. Malignant transformation is the end result of alter­ ed expression of genes related to normal cell growth control and differentiation. ...

Genetic lesions that activate KRAS account for ∼30% of the 1.6 million annual cases of lung cancer. Despite clinical need, KRAS is still undruggable using traditional small-molecule drugs/inhibitors. When oncogenic Kras is suppressed by RNA interference, tumors initially regress but eventually recur and proliferate despite suppression of Kras Here, we show that tumor cells can survive knockout ...

Oncogenic ras alleles are among the most common mutations found in patients with acute myeloid leukemia (AML). Previously, the role of oncogenic ras in cancer was assessed in model systems overexpressing oncogenic ras from heterologous promoters. However, there is increasing evidence that subtle differences in gene dosage and regulation of gene expression from endogenous promoters play critical...

In many different human cancers, one of the HRAS, NRAS, or KRAS genes in the RAS family of small GTPases acquires an oncogenic mutation that renders the encoded protein constitutively GTP-bound and thereby active, which is well established to promote tumorigenesis. In addition to oncogenic mutations, accumulating evidence suggests that the wild-type isoforms may also be activated and contribute...

BACKGROUND Oncogenic osteomalacia is an acquired form of hypophosphatemic osteomalacia where the tumour resection may lead to cure of the disease. Tumours originating from the musculoskeletal region form an important subgroup of oncogenic osteomalacia. METHODS This was a retrospective study conducted at a tertiary care centre in south India where we analyzed the hospital records of all the pa...

Cancer is a genetic disease caused by a series of somatic and/or germline mutations. The roles of oncogenes and tumor suppressors in cancer molecular origin have been well established. Targeting oncogene products has become an attractive therapeutic strategy with great clinical success, whereas tumor suppressors are considered 'undruggable' because current technology is not able to restore tumo...

Tumor-induced osteomalacia (TIO) is a rare paraneoplastic syndrome characterized biochemically by hypophosphatemia, excessive urinary phosphate excretion, low 1,25-dihydroxyvitamin D levels, and clinically by osteomalacia, pseudofractures, bone pain, fatigue, and muscle weakness. TIO can occur in patients with a variety of benign mesenchimal tumors (hemangiopericitomas, fibromas, angiosarcomas,...