Question: How many people are affected by inherited thyroxine-binding globulin deficiency ?
Answer: The complete form of inherited thyroxine-binding globulin deficiency, TBG-CD, affects about 1 in 15,000 newborns worldwide. The partial form, TBG-PD, affects about 1 in 4,000 newborns. These conditions appear to be more common in the Australian Aborigine population and in the Bedouin population of southern Israel.
Source: GHR

Question: What are the genetic changes related to inherited thyroxine-binding globulin deficiency ?
Answer: Inherited thyroxine-binding globulin deficiency results from mutations in the SERPINA7 gene. This gene provides instructions for making thyroxine-binding globulin. Some mutations in the SERPINA7 gene prevent the production of a functional protein, causing TBG-CD. Other mutations reduce the amount of this protein or alter its structure, resulting in TBG-PD. Researchers have also described non-inherited forms of thyroxine-binding globulin deficiency, which are more common than the inherited form. Non-inherited thyroxine-binding globulin deficiency can occur with a variety of illnesses and is a side effect of some medications.
Source: GHR

Question: Is inherited thyroxine-binding globulin deficiency inherited ?
Answer: Inherited thyroxine-binding globulin deficiency has an X-linked pattern of inheritance. The SERPINA7 gene is located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), a mutation in the only copy of the gene in each cell causes partial or complete inherited thyroxine-binding globulin deficiency. In females (who have two X chromosomes), a mutation in one of the two copies of the gene in each cell reduces the amount of thyroxine-binding globulin. However, their levels of this protein are usually within the normal range. A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons.
Source: GHR

Question: What are the treatments for inherited thyroxine-binding globulin deficiency ?
Answer: These resources address the diagnosis or management of inherited thyroxine-binding globulin deficiency: - American Thyroid Association: Thyroid Function Tests - MedlinePlus Encyclopedia: Serum TBG Level These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Source: GHR