A specialized type of dense connective tissue consisting of cells embedded in a ground substance or matrix. The matrix is firm and compact; its proteoglycans can store considerably more sodium than plasma can, which in turn allows cartilage to store water, which in turn helps cartilage withstand pressure or impact. Cartilage is bluish-white or gray and is semiopaque; it has no nerve or blood supply of its own. The cells lie in cavities called lacunae. They may be single or in groups of two, three, or four. Cartilage forms parts of joints in the adult skeleton, such as between vertebral bodies and on the articular surfaces of bones. It also occurs in the costal cartilages of the ribs, in the nasal septum, in the external ear and lining of the eustachian tube, in the wall of the larynx, and in the trachea and bronchi. It forms the major portion of the embryonic skeleton, providing a model in which most bones develop.
A member of a group of enzymes that can break down proteins, such as collagen, that are normally found in the spaces between cells in tissues (i.e., extracellular matrix proteins). Because these enzymes need zinc or calcium atoms to work properly, they are called metalloproteinases. Matrix metalloproteinases are involved in wound healing, angiogenesis, and tumor cell metastasis.
Deal with one problem at a time, Keep finding ways to enjoy the outdoors but stay away from the sun. Florescent lights also seem to cause flareups in skin from my wife’s experience. A good book I read called “The Sun Is My Enemy” covers an experience that follows what you describe, and it helps to understand the symptoms and life long effects than need addressing but don’t determine quality or length of life.
The principal receptors on animal cells for binding most extracellular matrix proteins—including collagens, fibronectin, and laminins—are the integrins. Integrins, like other cell adhesion molecules, differ from cell-surface receptors for hormones and for other extracellular soluble signal molecules in that they usually bind their ligand with lower affinity and are usually present at about tenfold to a hundredfold higher concentration on the cell surface. If the binding were too tight, cells would presumably become irreversibly glued to the matrix and would be unable to move—a problem that does not arise if attachment depends on large numbers of weak adhesions. This is an example of the “Velcro principle” mentioned earlier. Like other transmembrane cell adhesion proteins, however, integrins do more than just attach a cell to its surroundings. They also activate intracellular signaling pathways that communicate to the cell the character of the extracellular matrix that is bound.
Other medicines. You may need other medicines to treat illnesses or diseases that are linked to your lupus — such as high blood pressure or osteoporosis. Many people with lupus are also at risk for blood clots, which can cause a stroke or heart attack. Your doctor may prescribe anticoagulants (“blood thinners”), such as warfarin or heparin, to prevent your blood from clotting too easily. You cannot take warfarin during pregnancy.
Research has demonstrated evidence that a key enzyme's failure to dispose of dying cells may contribute the development of systemic lupus erythematosus. The enzyme, DNase1, normally eliminates what is called "garbage DNA" and other cellular debris by chopping them into tiny fragments for easier disposal. Researchers turned off the DNase1 gene in mice. The mice appeared healthy at birth, but after six to eight months, the majority of mice without DNase1 showed signs of systemic lupus erythematosus. Thus, a genetic mutation in a gene that could disrupt the body's cellular waste disposal may be involved in the initiation of systemic lupus erythematosus.
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“My message to patients is that we can do an excellent job of managing the condition compared to 20 years ago,” says Roberto Caricchio, MD, the interim section chief of rheumatology at Temple University Hospital in Philadelphia and the director of the Temple Lupus Clinic at the Lewis Katz School of Medicine. With that said, people should never underestimate the serious effects lupus can have, he adds, which is why working with your doctor to manage the condition is so important.
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