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Dermatophytosis as a cause of alopecia is common in cats, too, and in long-haired varieties, dermatophytic pseudomycetomas may be to blame. [7] Alopecia areata has been studied on mice in laboratories. [8] In horses, human contact with the horse and the rubbing of the saddle across the mane can cause patches of hair loss. [7]
Black and tan a t causes a black back with a tan belly. A/a t heterozygotes look like A W mice. [4] Nonagouti a mice are almost completely black, with only a few yellow hairs around the ears and the genitals. [4] Extreme nonagouti a e mice are fully black, and is recessive to all other alleles in the series. [4] This is not a complete list of ...
The myoglobin is filtered by the kidneys, but is toxic to the renal tubular epithelium and so may cause acute kidney injury. [32] It is not the myoglobin itself that is toxic (it is a protoxin), but the ferrihemate portion that is dissociated from myoglobin in acidic environments (e.g., acidic urine, lysosomes). [citation needed]
Pattern hair loss (also known as androgenetic alopecia (AGA) [1]) is a hair loss condition that primarily affects the top and front of the scalp. [2] [3] In male-pattern hair loss (MPHL), the hair loss typically presents itself as either a receding front hairline, loss of hair on the crown and vertex of the scalp, or a combination of both.
Agouti-signaling protein is a protein that in humans is encoded by the ASIP gene. [5] [6] It is responsible for the distribution of melanin pigment in mammals.[7] [8] Agouti interacts with the melanocortin 1 receptor to determine whether the melanocyte (pigment cell) produces phaeomelanin (a red to yellow pigment), or eumelanin (a brown to black pigment). [9]
Severe hair loss is reported from doxorubicin, the nitrosoureas, and cyclophosphamide. Other causes are bleomycin, dactinomycin, daunorubicin, systemic fluorouracil, and high-dose methotrexate. Other medicines such as colchicine and ciclosporin (ciclosporin more often causes increased hair growth) Poisons such as thallium, arsenic, gold and ...
Piebaldism refers to the absence of mature melanin-forming cells (melanocytes) in certain areas of the skin and hair. It is a rare autosomal dominant disorder of melanocyte development. [ 2 ] : 867 Common characteristics include a congenital white forelock , scattered normal pigmented and hypopigmented macules and a triangular shaped ...
Alopecia totalis is the loss of all hair on the head and face.Its causes are unclear, but believed to be autoimmune.Research suggests there may be a genetic component linked to developing alopecia totalis; the presence of DRB1*0401 and DQB1*0301, both of which are human leukocyte antigens (HLA), were found to be associated with long-standing alopecia totalis.