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p53 Signaling p53 Signaling Friday, January 23, 2015
p53 is a tumour suppressor protein that regulates the expression of a wide variety of genes involved in Apoptosis, Growth arrest, Inhibition of cell cycle progression, Differentiation and accelerated DNA repair or Senescence in response to Genotoxic or Cellular Stress. As a transcription factor, p53 is composed of an N-terminal Activation Domain, a central [...]
Actin Nucleation and Branching Actin Nucleation and Branching Wednesday, January 21, 2015
The actin family is a diverse and evolutionarily ancient group of proteins that provide the supportive framework to the three-dimensional structure of eukaryotic cells. It provides the forces that enable the cell to adopt a variety of shapes and to undertake directed movements. Certain cell types, such as polymorphonuclear leukocytes, monocyte/macrophages, and [...]
PI3K Signaling PI3K Signaling Tuesday, January 06, 2015
The PI3K (Phosphatidylinositde-3-Kinase) family of enzymes regulate diverse biological functions in every cell type by generating lipid second messengers that ultimately results in the mediation of cellular activities such as proliferation, differentiation, chemotaxis, survival, trafficking and Glucose homeostasis. On the basis of structural similarities, the PI3K members are sub-divided into three classes; Class I, II
CXCR4 Pathway CXCR4 Pathway Thursday, January 01, 2015
The Chemokine receptor CXCR4 is a 352 amino acid rhodopsin-like GPCR and selectively binds the CXC chemokine Stromal Cell-Derived Factor 1 (SDF-1) also known as CXCL12. Classically, two alternatively spliced isoforms of SDF have been identified. SDF-1Alpha is an 89 amino acid protein that is the predominantly expressed form of SDF-1 while [...]
Ebola Virus Pathogenesis Ebola Virus Pathogenesis Wednesday, December 10, 2014
Ebola virus is an aggressive pathogen that causes a highly lethal hemorrhagic fever syndrome in humans and nonhuman primates. Typically, Ebola virus infection runs its course within 14 to 21 days. Infection initially presents with nonspecific flu-like symptoms such as fever, myalgia, and malaise. As the infection progresses, patients exhibit severe bleeding [...]
Mitochondrial Apoptosis Mitochondrial Apoptosis Monday, December 01, 2014
Apoptosis is a naturally occurring process by which a cell is directed to Programmed Cell Death. Apoptosis is based on a genetic program that is an indispensable part of the development and function of an organism. In this process, cells that are no longer needed or that will be detrimental to an [...]
PTEN Pathway PTEN Pathway Thursday, November 13, 2014
Tumorigenesis is the result of abnormal activation of growth programs in the cells. Cancer cells escape normal growth control mechanisms as a consequence of activating mutations, or increased expression of one or more cellular protooncogenes, and/or inactivating mutations, or decreased expression of one or more tumor suppressor genes. Most oncogene and tumor [...]
IGF1R Signaling IGF1R Signaling Wednesday, October 29, 2014
Programmed cell death, a form of altruistic suicide is a genetically controlled means of cellular self-destruction that leads to dismantling and packaging of cell material for removal by phagocytosis. All cells possess the ability to undergo programmed cell death (otherwise known as apoptosis), and the process is essential for normal development to [...]