LIG4 syndrome: Difference between revisions
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{{Infobox medical condition | |||
| name = LIG4 syndrome | |||
| image = [[File:LIG4.jpg]] | |||
| caption = | |||
| synonyms = Ligase IV syndrome | |||
| pronounce = | |||
| specialty = [[Clinical genetics]] | |||
| symptoms = [[Microcephaly]], [[developmental delay]], [[immunodeficiency]], [[facial dysmorphism]] | |||
| onset = [[Congenital]] | |||
| duration = Lifelong | |||
| causes = Mutations in the [[LIG4]] gene | |||
| risks = | |||
| diagnosis = [[Genetic testing]], [[clinical evaluation]] | |||
| differential = [[Nijmegen breakage syndrome]], [[Ataxia-telangiectasia]], [[Seckel syndrome]] | |||
| prevention = Genetic counseling | |||
| treatment = [[Hematopoietic stem cell transplantation]], supportive care | |||
| medication = | |||
| prognosis = Variable, depending on severity | |||
| frequency = Rare | |||
| deaths = | |||
}} | |||
'''LIG4 syndrome''' is a rare autosomal recessive [[genetic disorder]] characterized by [[hypersensitivity]] to ionizing radiation and a propensity to develop malignancies. The syndrome is caused by mutations in the [[LIG4]] gene, which is involved in the repair of DNA double-strand breaks. | '''LIG4 syndrome''' is a rare autosomal recessive [[genetic disorder]] characterized by [[hypersensitivity]] to ionizing radiation and a propensity to develop malignancies. The syndrome is caused by mutations in the [[LIG4]] gene, which is involved in the repair of DNA double-strand breaks. | ||
== Symptoms and Signs == | == Symptoms and Signs == | ||
Patients with LIG4 syndrome typically present with a variety of clinical manifestations, including [[microcephaly]], unusual facial features, growth retardation, and immunodeficiency. They may also have a higher risk of developing [[leukemia]] and [[lymphoma]]. | Patients with LIG4 syndrome typically present with a variety of clinical manifestations, including [[microcephaly]], unusual facial features, growth retardation, and immunodeficiency. They may also have a higher risk of developing [[leukemia]] and [[lymphoma]]. | ||
== Genetics == | == Genetics == | ||
LIG4 syndrome is caused by mutations in the LIG4 gene, which encodes a DNA ligase that is essential for the repair of DNA double-strand breaks. These breaks can occur spontaneously during DNA replication or can be induced by ionizing radiation or certain chemicals. The LIG4 protein is involved in the non-homologous end joining (NHEJ) pathway, which is one of the major pathways for repairing these breaks. | LIG4 syndrome is caused by mutations in the LIG4 gene, which encodes a DNA ligase that is essential for the repair of DNA double-strand breaks. These breaks can occur spontaneously during DNA replication or can be induced by ionizing radiation or certain chemicals. The LIG4 protein is involved in the non-homologous end joining (NHEJ) pathway, which is one of the major pathways for repairing these breaks. | ||
== Diagnosis == | == Diagnosis == | ||
The diagnosis of LIG4 syndrome is based on clinical features, laboratory findings, and the identification of a pathogenic mutation in the LIG4 gene. Laboratory findings may include lymphopenia, anemia, and increased levels of [[gamma globulin]]. | The diagnosis of LIG4 syndrome is based on clinical features, laboratory findings, and the identification of a pathogenic mutation in the LIG4 gene. Laboratory findings may include lymphopenia, anemia, and increased levels of [[gamma globulin]]. | ||
== Treatment == | == Treatment == | ||
There is currently no cure for LIG4 syndrome. Treatment is supportive and may include regular monitoring for malignancies, [[immunoglobulin]] replacement therapy for immunodeficiency, and avoidance of ionizing radiation. | There is currently no cure for LIG4 syndrome. Treatment is supportive and may include regular monitoring for malignancies, [[immunoglobulin]] replacement therapy for immunodeficiency, and avoidance of ionizing radiation. | ||
== See Also == | == See Also == | ||
* [[DNA repair]] | * [[DNA repair]] | ||
* [[Non-homologous end joining]] | * [[Non-homologous end joining]] | ||
* [[Genetic disorders]] | * [[Genetic disorders]] | ||
== References == | == References == | ||
* O'Driscoll M, Cerosaletti KM, Girard PM, et al. DNA ligase IV mutations identified in patients exhibiting developmental delay and immunodeficiency. Molecular Cell. 2001;8(6):1175-1185. | * O'Driscoll M, Cerosaletti KM, Girard PM, et al. DNA ligase IV mutations identified in patients exhibiting developmental delay and immunodeficiency. Molecular Cell. 2001;8(6):1175-1185. | ||
* Buck D, Malivert L, de Chasseval R, et al. Cernunnos, a novel nonhomologous end-joining factor, is mutated in human immunodeficiency with microcephaly. Cell. 2006;124(2):287-299. | * Buck D, Malivert L, de Chasseval R, et al. Cernunnos, a novel nonhomologous end-joining factor, is mutated in human immunodeficiency with microcephaly. Cell. 2006;124(2):287-299. | ||
[[Category:Genetic disorders]] | [[Category:Genetic disorders]] | ||
[[Category:Rare diseases]] | [[Category:Rare diseases]] | ||
| Line 28: | Line 43: | ||
{{Rare diseases}} | {{Rare diseases}} | ||
[[Category:Syndromes]] {{stub}} | [[Category:Syndromes]] {{stub}} | ||
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| LIG4 syndrome | |
|---|---|
| File:LIG4.jpg | |
| Synonyms | Ligase IV syndrome |
| Pronounce | |
| Specialty | Clinical genetics |
| Symptoms | Microcephaly, developmental delay, immunodeficiency, facial dysmorphism |
| Complications | N/A |
| Onset | Congenital |
| Duration | Lifelong |
| Types | N/A |
| Causes | Mutations in the LIG4 gene |
| Risks | |
| Diagnosis | Genetic testing, clinical evaluation |
| Differential diagnosis | Nijmegen breakage syndrome, Ataxia-telangiectasia, Seckel syndrome |
| Prevention | Genetic counseling |
| Treatment | Hematopoietic stem cell transplantation, supportive care |
| Medication | |
| Prognosis | Variable, depending on severity |
| Frequency | Rare |
| Deaths | |
LIG4 syndrome is a rare autosomal recessive genetic disorder characterized by hypersensitivity to ionizing radiation and a propensity to develop malignancies. The syndrome is caused by mutations in the LIG4 gene, which is involved in the repair of DNA double-strand breaks.
Symptoms and Signs[edit]
Patients with LIG4 syndrome typically present with a variety of clinical manifestations, including microcephaly, unusual facial features, growth retardation, and immunodeficiency. They may also have a higher risk of developing leukemia and lymphoma.
Genetics[edit]
LIG4 syndrome is caused by mutations in the LIG4 gene, which encodes a DNA ligase that is essential for the repair of DNA double-strand breaks. These breaks can occur spontaneously during DNA replication or can be induced by ionizing radiation or certain chemicals. The LIG4 protein is involved in the non-homologous end joining (NHEJ) pathway, which is one of the major pathways for repairing these breaks.
Diagnosis[edit]
The diagnosis of LIG4 syndrome is based on clinical features, laboratory findings, and the identification of a pathogenic mutation in the LIG4 gene. Laboratory findings may include lymphopenia, anemia, and increased levels of gamma globulin.
Treatment[edit]
There is currently no cure for LIG4 syndrome. Treatment is supportive and may include regular monitoring for malignancies, immunoglobulin replacement therapy for immunodeficiency, and avoidance of ionizing radiation.
See Also[edit]
References[edit]
- O'Driscoll M, Cerosaletti KM, Girard PM, et al. DNA ligase IV mutations identified in patients exhibiting developmental delay and immunodeficiency. Molecular Cell. 2001;8(6):1175-1185.
- Buck D, Malivert L, de Chasseval R, et al. Cernunnos, a novel nonhomologous end-joining factor, is mutated in human immunodeficiency with microcephaly. Cell. 2006;124(2):287-299.
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This genetic disorder related article is a stub.
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NIH genetic and rare disease info[edit]
LIG4 syndrome is a rare disease.
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Rare diseases - LIG4 syndrome
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