Corticosteroid-Binding Globulin Deficiency (CBG DEFICIENCY)

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GARD: ¹⁹ Corticosteroid-binding globulin deficiency is a genetic disorder characterized by extreme tiredness (fatigue), particularly after physical exertion, and low blood pressure (hypotension). Corticosteroid-binding globulin (CBG) is a protein primarily produced in the liver that attaches to cortisol, a hormone with numerous functions, including maintaining blood sugar levels, protecting the body from stress, and suppressing inflammation. When cortisol is needed in the body, CBG delivers the cortisol where it is needed and releases it. Signs and symptoms of CBG deficiency vary. While some individuals may experience no symptoms, others are found to have a fatty liver and chronic pain. Some people with CBG deficiency also have chronic fatigue syndrome. CGB deficiency is caused by genetic changes in the SERPINA6 gene. The SERPINA6 gene is commonly also referred to as the CBG gene. Both autosomal dominant and autosomal recessive inheritance have been reported.

MalaCards based summary: Corticosteroid-Binding Globulin Deficiency, also known as transcortin deficiency, is related to chronic fatigue syndrome and pituitary-dependent cushing's disease, and has symptoms including fatigue and generalized fatigue. An important gene associated with Corticosteroid-Binding Globulin Deficiency is SERPINA6 (Serpin Family A Member 6), and among its related pathways/superpathways are Metabolism of steroids and Glucocorticoid receptor regulatory network. Affiliated tissues include adrenal gland, liver and brain, and related phenotypes are hypotension and hypertension

MedlinePlus Genetics: ⁴² Corticosteroid-binding globulin deficiency is a condition with subtle signs and symptoms, the most frequent being extreme tiredness (fatigue), especially after physical exertion. Many people with this condition have unusually low blood pressure (hypotension). Some affected individuals have a fatty liver or experience chronic pain, particularly in their muscles. These features vary among affected individuals, even those within the same family.Many people with corticosteroid-binding globulin deficiency have only one or two of these features; others have no signs and symptoms of the disorder and are only diagnosed after a relative is found to be affected.Some people with corticosteroid-binding globulin deficiency also have a condition called chronic fatigue syndrome. The features of chronic fatigue syndrome are prolonged fatigue that interferes with daily activities, as well as general symptoms, such as sore throat or headaches.

Orphanet: ⁵⁸ Corticosteroid-binding globulin deficiency is a rare, genetic, adrenal disease characterized by diminished corticosteroid-binding capacity associated with normal or low plasma corticosteroid-binding globulin concentration and reduced total plasma cortisol levels. Patients typically present chronic pain, fatigue and hypo/hypertension.

Disease Ontology: ¹¹ An adrenal gland disease characterized by decreased levels of serum corticosteroid-binding globulin and cortisol, and in some cases hypo- or hypertension, and muscle fatigue that has material basis in heterozygous or homozygous mutation in the SERPINA6 gene on chromosome 14q32.

UniProtKB/Swiss-Prot: ⁷³ Extremely rare hereditary disorder characterized by reduced corticosteroid-binding capacity with normal or low plasma corticosteroid-binding globulin concentration, and normal or low basal cortisol levels associated with hypo/hypertension and muscle fatigue.

Clinical features from OMIM®:

Search Clinical Trials, NIH Clinical Center for Corticosteroid-Binding Globulin Deficiency