Lesch Nyhan Syndrome :: essays research papers

Lesch Nyhan SyndromeLesch Nyhan Syndrome (LNS) was first reported in 1964 by Michael Lesch and William L. Nyhan. It is a r are disorder located on the x chromosome. It is a sex-linked trait, which means that it is passed from mother to son. This condition can be inherited or occur spontaneously as a result of a patrimonial mutation. It usually appears once in every 100,000 male births. Since the defective gene is recessive, females almost never exhibit symptoms of the disease. However, they can be carriers of the allele. Lesch Nyhan is associated with an almost sail through absence of the enzyme HGPRTase (hypoxanthene guanine phosphoribosil transferase). This is the enzyme that recycles hypoxanthen and guanine, which are two of the genetic building blocks. When this enzyme is non present, the hypoxanthen and guanine are converted into excessive uric acid. Children around iv to six months old are usually diagnosed with LND when orange, sand like uric acid crystals are observed in their diapers. These crystals cause painful urination, arthritis and kidney stones as they build up in various areas of the body. LNS had many symptoms. Affected multitude manifest developmental delays, seizures, spacticiy, speech impairment and moderate retardation. The victims usually minify within a 40-80 IQ range. By four years of get on with the children usually start to exhibit the most well-known symptom of Lesch Nyhan self-mutilization. The patients buzz off practicing physical mutilization and hurting themselves through indirect emotional injuries. These behaviors seem to upgrade as the children get older and be deign more physically subject of inflicting self-injury and more mentally capable of thinking up new ship canal to hurt themselves. Early forms of self-mutilization include biting of the tongue and cheeks, gouging the nose and eyes, rub various body parts raw, and banging the head, arms, and legs on things. Another part of abnormal behavior associated wit h LNS is manifested as indirect or emotional self-injury. Individuals with these symptoms are compelled to hurt and abuse themselves and the people they care for most. They lash out at parents, teachers and aides. A few examples of this behavior include kicking and head butting as they are being dressed or bathed, cursing without provocation, spitting, vomiting or spilling drinks on care providers. After performing these behaviors, the individual will explain profusely, only to repeat the offending behavior shortly thereafter.Scientists have come to recognize this behavior as indirect attempts of self-injury.