|Basic structure of a peroxisome|
Acatalasia (also called acatalasemia, or Takahara's disease:809) is an autosomal recessive peroxisomal disorder caused by absent or very low levels of the enzyme catalase. Catalase breaks down hydrogen peroxide in cells into water and oxygen. Low levels of catalase can cause hydrogen peroxide to build up, causing damage to cells.
Acatalasia is often the result of mutations in both copies of the CAT gene which codes for the enzyme catalase. There are multiple types of mutation that can cause this condition. Inheriting a single CAT mutation results in hypocatalasia, in which catalase levels are reduced, but still at functional levels.
This disorder is commonly diagnosed pouring hydrogen peroxide on the patient's blood sample. Instead of a very bubbling reaction, blood turns brown-colored, which means the patient suffers from acatalasia
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In 1948, Dr. Shigeo Takahara (1908–1994), a Japanese otolaryngologist first reported this new disease. He had examined a patient with an oral ulcer. He had spread hydrogen peroxide on the diseased part, but oxygen was not generated due to the lack of catalase.
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- Bissonnette, Bruno; Luginbuehl, Igor; Marciniak, Bruno; Dalens, Bernard J. (2006). "Acatalasia/Acatalasemia". Syndromes: Rapid Recognition and Perioperative Implications. The McGraw-Hill Companies.
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- "OMIM Entry - # 614097 - ACATALASEMIA". www.omim.org.
- Takahara, S.; Miyamoto, H. Three cases of progressive oral gangrene due to lack of catalase in the blood. Nippon Jibi-Inkoka Gakkai Kaiho 51: 163 only, 1948.