Hereditary spherocytosis causes: Difference between revisions

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==Overview==
==Overview==
* [[Hereditary spherocytosis|HS]] is caused by a variety of [[mutations]] that cause defects in [[Red blood cells|red blood cell (RBC)]] membrane proteins. HS usually is transmitted as an [[autosomal dominant]] trait, and the identification of the disorder in multiple [[Generation|generations]] of affected families is the rule.  
[[Hereditary spherocytosis]] is caused by a variety of [[Genetics|genetic]] [[Mutation|mutations]]. The 05 [[Gene|genes]] associated with [[hereditary spherocytosis]] include; [[Spectrin, alpha 1|alpha spectrin (SPTA1)]], [[Spectrin|beta spectrin (SPTB)]], [[Ankyrin|ankyrin (ANK1)]], [[band 3]] ([[SLC4A11|SLC4A1]]) and [[protein 4.2]] (EPB42). [[Mutation|Mutations]] in one or more of these [[Gene|genes]] can cause [[Cell membrane|membrane]] [[protein]] [[deficiency]] leading to [[hereditary spherocytosis]].


==Causes==
==Causes==
* [[Hereditary spherocytosis|HS]] is caused by a variety of [[mutations]] that lead to defects in [[Red blood cells|red blood cell (RBC)]] membrane proteins. HS usually is transmitted as an [[autosomal dominant]] trait, and the identification of the disorder in multiple [[Generation|generations]] of affected families is the rule. [[Homozygosity]] for this dominantly transmitted [[Hereditary spherocytosis|HS]] [[gene]] has not been identified, which suggests that the [[homozygous]] state is incompatible with life.
* [[Hereditary spherocytosis]] is caused by a variety of [[Genetics|genetic]] [[Mutation|mutations]].<ref name="HeLiao2018">{{cite journal|last1=He|first1=Ben-Jin|last2=Liao|first2=Lin|last3=Deng|first3=Zeng-Fu|last4=Tao|first4=Yi-Feng|last5=Xu|first5=Yu-Chan|last6=Lin|first6=Fa-Quan|title=Molecular Genetic Mechanisms of Hereditary Spherocytosis: Current Perspectives|journal=Acta Haematologica|volume=139|issue=1|year=2018|pages=60–66|issn=0001-5792|doi=10.1159/000486229}}</ref><ref name="PerrottaGallagher2008">{{cite journal|last1=Perrotta|first1=Silverio|last2=Gallagher|first2=Patrick G|last3=Mohandas|first3=Narla|title=Hereditary spherocytosis|journal=The Lancet|volume=372|issue=9647|year=2008|pages=1411–1426|issn=01406736|doi=10.1016/S0140-6736(08)61588-3}}</ref>
 
* There are 05 [[Gene|genes]] associated with [[hereditary spherocytosis]] including, [[Spectrin, alpha 1|alpha spectrin]] ([[SPTA1]]), [[Spectrin|beta spectrin]] ([[SPTB]]), [[ankyrin]] ([[ANK1]]), [[Band 3|band3]] ([[SLC4A11|SLC4A1]]) and [[protein 4.2]] (EPB42).
* Twenty-five percent of all newly diagnosed patients do not demonstrate a [[dominant]] inheritance pattern. Parents of these patients do not have clinical or hematologic abnormalities. Some of these sporadic cases may result from new [[mutations]].
* [[Mutation|Mutations]] in one or more of [[hereditary spherocytosis]] related [[Gene|genes]] can [[Causality|cause]] [[Cell membrane|membrane]] [[protein]] [[deficiency]] leading to [[hereditary spherocytosis]].
 
{| class="wikitable"
* An [[autosomal recessive]] mode of inheritance also occurs, as indicated by descriptions of families in which apparently healthy parents have had more than one affected child. [[Recessive]] inheritance may account for 20-25% of all [[Hereditary spherocytosis|HS]] cases. It manifests only in individuals who are [[homozygous]] or compound [[heterozygous]] and often is associated with severe [[hemolytic anemia]].
|+[[Molecule|Molecular]] and [[Genetics|Genetic]] Characteristics of 5 [[Red blood cell|Erythrocyte]] [[Membrane]] [[Protein]] [[Gene|Genes]]
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Gene}}
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Chromosome Location}}
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Membrane Protein}}
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Prevalent Mutations}}
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Heredity}}
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Associated Disease}}
|-
| [[ANK1]]
|[[Chromosome 8 (human)|8p11.2]]
| [[Ankyrin|Ankyrin-1]]
| [[Frameshift mutation|frameshift]], [[Nonsense mutation|nonsense]], [[Splicing (genetics)|splicing]], novel [[Mutation|mutations]]
| [[Dominance relationship|autosomal dominant]], [[autosomal recessive]]
| [[hereditary spherocytosis]]
|-
| [[SLC4A11|SLC4A1]]
| [[Chromosome 17 (human)|17q21]]
| [[Band 3|Band3]]
| [[Missense mutation|missense]],[[Frameshift mutation|frameshift]],[[polymorphism]]
| [[Dominance relationship|autosomal dominant]]
| [[hereditary spherocytosis]],[[Renal tubular acidosis|distal renal tubular acidosis]]
|-
| [[SPTA1]]
| [[Chromosome 1 (human)|1q22-q23]]
| [[Spectrin, alpha 1|alpha spectrin]]
| SpaLEPRA [[allele]], [[Splicing (genetics)|splicing]], [[Frameshift mutation|frameshift]]
| [[autosomal recessive]]
| [[hereditary spherocytosis]], [[hereditary elliptocytosis]], [[hereditary pyropoikilocytosis]]
|-
| [[SPTB]]
| [[Chromosome 14 (human)|14q23-q24.1]]
| [[Spectrin|beta spectrin]]
| [[Splicing (genetics)|splicing]], [[Frameshift mutation|frameshift]], [[Nonsense mutation|nonsense]], novel [[Mutation|mutations]]
| [[Dominance relationship|autosomal dominant]]
| [[hereditary spherocytosis]], [[hereditary elliptocytosis]], [[hereditary pyropoikilocytosis]]
|-
| EBP42
| [[Chromosome 15 (human)|15q15-q21]]
| [[protein 4.2]]
| [[Missense mutation|missense]], [[Nonsense mutation|nonsense]]
| [[autosomal recessive]]
| [[hereditary spherocytosis]]
|}


==References==
==References==

Latest revision as of 15:03, 5 December 2018

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Overview

Hereditary spherocytosis is caused by a variety of genetic mutations. The 05 genes associated with hereditary spherocytosis include; alpha spectrin (SPTA1), beta spectrin (SPTB), ankyrin (ANK1), band 3 (SLC4A1) and protein 4.2 (EPB42). Mutations in one or more of these genes can cause membrane protein deficiency leading to hereditary spherocytosis.

Causes

Molecular and Genetic Characteristics of 5 Erythrocyte Membrane Protein Genes
Gene Chromosome Location Membrane Protein Prevalent Mutations Heredity Associated Disease
ANK1 8p11.2 Ankyrin-1 frameshift, nonsense, splicing, novel mutations autosomal dominant, autosomal recessive hereditary spherocytosis
SLC4A1 17q21 Band3 missense,frameshift,polymorphism autosomal dominant hereditary spherocytosis,distal renal tubular acidosis
SPTA1 1q22-q23 alpha spectrin SpaLEPRA allele, splicing, frameshift autosomal recessive hereditary spherocytosis, hereditary elliptocytosis, hereditary pyropoikilocytosis
SPTB 14q23-q24.1 beta spectrin splicing, frameshift, nonsense, novel mutations autosomal dominant hereditary spherocytosis, hereditary elliptocytosis, hereditary pyropoikilocytosis
EBP42 15q15-q21 protein 4.2 missense, nonsense autosomal recessive hereditary spherocytosis

References

  1. He, Ben-Jin; Liao, Lin; Deng, Zeng-Fu; Tao, Yi-Feng; Xu, Yu-Chan; Lin, Fa-Quan (2018). "Molecular Genetic Mechanisms of Hereditary Spherocytosis: Current Perspectives". Acta Haematologica. 139 (1): 60–66. doi:10.1159/000486229. ISSN 0001-5792.
  2. Perrotta, Silverio; Gallagher, Patrick G; Mohandas, Narla (2008). "Hereditary spherocytosis". The Lancet. 372 (9647): 1411–1426. doi:10.1016/S0140-6736(08)61588-3. ISSN 0140-6736.

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