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Hypouricemia or hypouricaemia is a level of uric acid in blood serum that is below normal. In humans, the normal range of this blood component has a lower threshold set variously in the range of 2 mg/dL to 4 mg/dL, while the upper threshold is 530 μmol/L (6 mg/dL) for women and 619 μmol/L (7 mg/dL) for men. [1]
Purine is a heterocyclic aromatic organic compound that consists of two rings (pyrimidine and imidazole) fused together. It is water-soluble. Purine also gives its name to the wider class of molecules, purines, which include substituted purines and their tautomers. They are the most widely occurring nitrogen-containing heterocycles in nature. [1]
Purines are biologically synthesized as nucleotides and in particular as ribotides, i.e. bases attached to ribose 5-phosphate.Both adenine and guanine are derived from the nucleotide inosine monophosphate (IMP), which is the first compound in the pathway to have a completely formed purine ring system.
Unless high blood levels of uric acid are determined in a clinical laboratory, hyperuricemia may not cause noticeable symptoms in most people. [4] Development of gout – which is a painful, short-term disorder – is the most common consequence of hyperuricemia, which causes deposition of uric acid crystals usually in joints of the extremities, but may also induce formation of kidney stones ...
Orotic aciduria (AKA hereditary orotic aciduria) is a disease caused by an enzyme deficiency, resulting in a decreased ability to synthesize pyrimidines.It was the first described enzyme deficiency of the de novo pyrimidine synthesis pathway.
Purine metabolism. As in other X-linked diseases, males are affected because they only have one copy of the X chromosome. In Lesch–Nyhan syndrome, the defective gene is that for hypoxanthine-guanine phosphoribosyltransferase (HGPRT), a participant in the 'recycling' of purine nucleotides. Female carriers have a second X chromosome, which ...
Analysis of a sample of synovial fluid to look for signs of an infection (infectious arthritis) or uric acid crystals (gout) Imaging tests, such as X-rays or MRI scans, to evaluate the condition ...
In general, the water solubility of uric acid and its alkali metal and alkaline earth salts is rather low. All these salts exhibit greater solubility in hot water than cold, allowing for easy recrystallization. This low solubility is significant for the etiology of gout. The solubility of the acid and its salts in ethanol is very low or ...