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Unlike necrosis, apoptosis produces cell fragments called apoptotic bodies that phagocytes are able to engulf and remove before the contents of the cell can spill out onto surrounding cells and cause damage to them. [5] Because apoptosis cannot stop once it has begun, it is a highly regulated process.
[19] [20] One of the damaging results of excess calcium in the cytosol is initiating apoptosis through cleaved caspase processing. [20] Another damaging result of excess calcium in the cytosol is the opening of the mitochondrial permeability transition pore, a pore in the membranes of mitochondria that opens when the organelles absorb too much ...
While apoptosis often provides beneficial effects to the organism, necrosis is almost always detrimental and can be fatal. [ 3 ] Cellular death due to necrosis does not follow the apoptotic signal transduction pathway, but rather various receptors are activated and result in the loss of cell membrane integrity [ 4 ] and an uncontrolled release ...
Cellular hypertrophy is an increase in cell size and volume. If enough cells of an organ hypertrophy the whole organ will increase in size. Hypertrophy may involve an increase in intracellular protein as well as cytosol (intracellular fluid) and other cytoplasmic components.
Overview of signal transduction pathways involved in apoptosis. Akt kinases can promote growth factor-mediated cell survival both directly and indirectly. BAD is a pro-apoptotic protein of the Bcl-2 family. Akt1 can phosphorylate BAD on Ser136, [21] which makes BAD dissociate from the Bcl-2/Bcl-X complex and lose the pro-apoptotic function. [22]
Insulin-like growth factors and their binding proteins play a key role in cancer cell proliferation, differentiation and apoptosis, suggesting possible involvement in carcinogenesis. [ 93 ] Hormones are important agents in sex-related cancers, such as cancer of the breast, endometrium , prostate, ovary and testis and also of thyroid cancer and ...
Apoptosis inducing factor is involved in initiating a caspase-independent pathway of apoptosis (positive intrinsic regulator of apoptosis) by causing DNA fragmentation and chromatin condensation. Apoptosis inducing factor is a flavoprotein. [2] It also acts as an NADH oxidase. Another AIF function is to regulate the permeability of the ...
Programmed cell death (PCD; sometimes referred to as cellular suicide [1]) is the death of a cell as a result of events inside of a cell, such as apoptosis or autophagy. [2] [3] PCD is carried out in a biological process, which usually confers advantage during an organism's lifecycle.