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Deficiency in GlcNAc-1-P transferase causes DPAGT1-CDG (CDG-Ij) [14] Loss of the first mannosyltransferase causes ALG1-CDG (CDG-Ik) [15] Loss of the second mannosyltransferase (adds Man II and III) causes ALG2-CDG (CDG-Ii). [16] Loss of the third mannosyltransferase (adds Man IV and V) causes ALG11-CDG (CDG-Ip) [17]
Infants with GLUT1 deficiency syndrome have a normal head size at birth, but the growth of the brain and skull is slow, in severe cases resulting in an abnormally small head size (microcephaly). [4] Typically, seizures start between one and four months in 90% of cases with abnormal eye movements and apneic episodes preceding the onset of ...
ALG1-CDG is an autosomal recessive congenital disorder of glycosylation caused by biallelic pathogenic variants in ALG1. The first cases of ALG1-CDG were described in 2004, and the causative gene was identified at the same time. This disorder was originally designated CDG-IK, under earlier nomenclature for congenital disorders of glycosylation. [1]
Glutaric acidemia type 1 (GA1) is an inherited disorder in which the body is unable to completely break down the amino acids lysine, hydroxylysine and tryptophan.Excessive levels of their intermediate breakdown products (glutaric acid, glutaryl-CoA, 3-hydroxyglutaric acid, glutaconic acid) can accumulate and cause damage to the brain (and also other organs [1]), but particularly the basal ...
It is decreased during attacks of hereditary angioedema (but those with the disease have a normal value in between attacks). [ 7 ] Increased CH50 values means that their complement is hyperfunctional relative to normal, and this may be seen in cancer or ulcerative colitis [ citation needed ] .
NGLY1 deficiency is a very rare genetic disorder caused by biallelic pathogenic variants in NGLY1. It is an autosomal recessive disorder. Errors in deglycosylation are responsible for the symptoms of this condition. [ 1 ]
A missense mutation is a point mutation that changes one nucleotide, which results in a codon that codes for the wrong amino acid. Alagille syndrome is inherited in an autosomal dominant pattern, which means one copy of the altered gene is sufficient to cause the disorder.
Isolated hypogonadotropic hypogonadism (IHH), also called idiopathic or congenital hypogonadotropic hypogonadism (CHH), as well as isolated or congenital gonadotropin-releasing hormone deficiency (IGD), is a condition which results in a small subset of cases of hypogonadotropic hypogonadism (HH) due to deficiency in or insensitivity to gonadotropin-releasing hormone (GnRH) where the function ...