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A suspected contributor to familial PED is a mutation in the GLUT1 gene, SLC2A1, which codes for the transporter GLUT1, a protein responsible for glucose entry across the blood–brain barrier. [5] It is not thought that the mutation causes a complete loss of function of the protein but rather only slightly reduces the transporter's activity. [8]
The GLUT1 protein that transports glucose across the blood brain barrier is encoded by the SLC2A1 gene, located on chromosome 1. [8] In GLUT1 deficiency syndrome, one of the two genes is damaged by a mutation and an insufficient amount protein is made. As a result, insufficient glucose is passing the blood brain barrier.
A newer theory suggests that the selective pressure on the CCR5 Delta 32 mutation was caused by smallpox instead of the bubonic plague. [117] Malaria resistance: An example of a harmful mutation is sickle-cell disease, a blood disorder in which the body produces an abnormal type of the oxygen-carrying substance haemoglobin in the red blood cells.
Mutations of the gene for this enzyme can cause unusual forms of diabetes or hypoglycemia. Glucokinase (GK) is a hexokinase isozyme, related homologously to at least three other hexokinases. [4] All of the hexokinases can mediate phosphorylation of glucose to glucose-6-phosphate (G6P), which is the first step of both glycogen synthesis and ...
Mutations in the GLUT1 gene are responsible for GLUT1 deficiency or De Vivo disease, which is a rare autosomal dominant disorder. [14] This disease is characterized by a low cerebrospinal fluid glucose concentration (hypoglycorrhachia), a type of neuroglycopenia, which results from impaired glucose transport across the blood–brain barrier.
Defects in the SLC2A2 gene are associated with a particular type of glycogen storage disease called Fanconi-Bickel syndrome. [13]In drug-treated diabetic pregnancies in which glucose levels in the woman are uncontrolled, neural tube and cardiac defects in the early-developing brain, spine, and heart depend upon functional GLUT2 carriers, and defects in the GLUT2 gene have been shown to be ...
Repaglinide (Prandin) can help the body regulate the amount of glucose in the blood by stimulating the pancreas to release insulin before meals. In some cases, the baseline glucose levels are too high as well and insulin is required. MODY2 is an autosomal dominant condition. Autosomal dominance refers to a single, abnormal gene on one of the ...
Glucose transporter type 4 (GLUT4), also known as solute carrier family 2, facilitated glucose transporter member 4, is a protein encoded, in humans, by the SLC2A4 gene. GLUT4 is the insulin -regulated glucose transporter found primarily in adipose tissues and striated muscle (skeletal and cardiac).