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Increased expression of apoptotic proteins such as BIM, or their decreased proteolysis, leads to cell death and can cause a number of pathologies, depending on the cells where excessive activity of BIM occurs. Cancer cells can escape apoptosis through mechanisms that suppress BIM expression or by increased proteolysis of BIM. [citation needed]
Cell damage (also known as cell injury) is a variety of changes of stress that a cell suffers due to external as well as internal environmental changes. Amongst other causes, this can be due to physical, chemical, infectious, biological, nutritional or immunological factors. Cell damage can be reversible or irreversible.
Atrophy is the partial or complete wasting away of a part of the body. Causes of atrophy include mutations (which can destroy the gene to build up the organ), poor nourishment, poor circulation, loss of hormonal support, loss of nerve supply to the target organ, excessive amount of apoptosis of cells, and disuse or lack of exercise or disease intrinsic to the tissue itself.
Malnutrition first causes fat loss but may progress to muscle atrophy in prolonged starvation and can be reversed with nutritional therapy. In contrast, cachexia is a wasting syndrome caused by an underlying disease such as cancer that causes dramatic muscle atrophy and cannot be completely reversed with nutritional therapy.
Cachexia (/ k ə ˈ k ɛ k s i ə / [1]) is a syndrome that happens when people have certain illnesses, causing muscle loss that cannot be fully reversed with improved nutrition. [2] It is most common in diseases like cancer, congestive heart failure, chronic obstructive pulmonary disease, chronic kidney disease, and AIDS.
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During apoptosis (programmed cell death), the cell's cytoskeleton breaks up and causes the membrane to bulge outward. [13] These bulges may separate from the cell, taking a portion of cytoplasm with them, to become known as apoptotic blebs. [14] Phagocytic cells eventually consume these fragments and the components are recycled. [citation needed]
Instead of helping celebrities look better, experts warn that extreme weight loss causes the opposite, as the body loses the necessary fat to look young and healthy Image credits: Leah Puttkammer ...