Aneuploidy: Difference between revisions
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[[ | {{SI}}<br> | ||
{{Infobox medical condition | |||
| name = Aneuploidy | |||
| image = [[File:Down_Syndrome_Karyotype.png|250px]] | |||
| caption = Karyotype of [[Down syndrome]], a common form of aneuploidy | |||
| field = [[Medical genetics]] | |||
| symptoms = Varies depending on the specific aneuploidy; may include developmental delays, intellectual disability, physical abnormalities | |||
| complications = Increased risk of [[congenital heart defects]], [[leukemia]], [[infertility]] | |||
| onset = Congenital | |||
| duration = Lifelong | |||
| causes = [[Nondisjunction]] during [[meiosis]] or [[mitosis]] | |||
| risks = Advanced maternal age, family history of aneuploidy | |||
| diagnosis = [[Karyotype]] analysis, [[prenatal screening]] | |||
| differential = [[Balanced translocation]], [[mosaicism]] | |||
| prevention = [[Genetic counseling]], [[preimplantation genetic diagnosis]] | |||
| treatment = Symptomatic and supportive care | |||
| prognosis = Varies widely depending on the specific aneuploidy | |||
| frequency = Varies; [[Down syndrome]] occurs in approximately 1 in 700 live births | |||
}} | |||
[[file:Human_male_karyotype.gif|thumb|left]] [[file:Trisomy_Detection_in_GeneMarker.jpg|thumb|right]] [[file:Human_karyotype_with_bands_and_sub-bands.png|thumb|right]] '''Aneuploidy''' | |||
'''Aneuploidy''' is a condition in which the number of [[chromosomes]] in the [[cell nucleus]] is not the typical number for the species. This deviation from the normal chromosome number can lead to various genetic disorders and is a significant area of study in [[genetics]] and [[medicine]]. | '''Aneuploidy''' is a condition in which the number of [[chromosomes]] in the [[cell nucleus]] is not the typical number for the species. This deviation from the normal chromosome number can lead to various genetic disorders and is a significant area of study in [[genetics]] and [[medicine]]. | ||
==Types of Aneuploidy== | ==Types of Aneuploidy== | ||
Aneuploidy can be classified based on the type of chromosome that is affected and the nature of the numerical change. The main types include: | Aneuploidy can be classified based on the type of chromosome that is affected and the nature of the numerical change. The main types include: | ||
* '''[[Monosomy]]''': The presence of only one chromosome from a pair. An example is [[Turner syndrome]], where there is a single X chromosome. | * '''[[Monosomy]]''': The presence of only one chromosome from a pair. An example is [[Turner syndrome]], where there is a single X chromosome. | ||
* '''[[Trisomy]]''': The presence of an extra chromosome, resulting in three copies instead of the usual two. Examples include [[Down syndrome]] (Trisomy 21), [[Edwards syndrome]] (Trisomy 18), and [[Patau syndrome]] (Trisomy 13). | * '''[[Trisomy]]''': The presence of an extra chromosome, resulting in three copies instead of the usual two. Examples include [[Down syndrome]] (Trisomy 21), [[Edwards syndrome]] (Trisomy 18), and [[Patau syndrome]] (Trisomy 13). | ||
* '''[[Tetrasomy]]''': The presence of four copies of a chromosome. | * '''[[Tetrasomy]]''': The presence of four copies of a chromosome. | ||
* '''[[Nullisomy]]''': The absence of both chromosomes from a pair. | * '''[[Nullisomy]]''': The absence of both chromosomes from a pair. | ||
==Causes== | ==Causes== | ||
Aneuploidy typically arises from errors during [[cell division]], specifically during [[meiosis]] or [[mitosis]]. These errors can include: | Aneuploidy typically arises from errors during [[cell division]], specifically during [[meiosis]] or [[mitosis]]. These errors can include: | ||
* '''[[Nondisjunction]]''': The failure of chromosomes to separate properly during cell division. | * '''[[Nondisjunction]]''': The failure of chromosomes to separate properly during cell division. | ||
* '''[[Anaphase lag]]''': A chromosome is left behind during cell division and is not included in the daughter cell. | * '''[[Anaphase lag]]''': A chromosome is left behind during cell division and is not included in the daughter cell. | ||
==Consequences== | ==Consequences== | ||
The consequences of aneuploidy can vary widely depending on the specific chromosomes involved and the type of aneuploidy. Some common consequences include: | The consequences of aneuploidy can vary widely depending on the specific chromosomes involved and the type of aneuploidy. Some common consequences include: | ||
* Developmental disorders | * Developmental disorders | ||
* Physical abnormalities | * Physical abnormalities | ||
* Intellectual disabilities | * Intellectual disabilities | ||
* Increased risk of certain diseases, such as [[cancer]] | * Increased risk of certain diseases, such as [[cancer]] | ||
==Diagnosis== | ==Diagnosis== | ||
Aneuploidy can be diagnosed through various genetic testing methods, including: | Aneuploidy can be diagnosed through various genetic testing methods, including: | ||
* [[Karyotyping]] | * [[Karyotyping]] | ||
* [[Fluorescence in situ hybridization]] (FISH) | * [[Fluorescence in situ hybridization]] (FISH) | ||
* [[Comparative genomic hybridization]] (CGH) | * [[Comparative genomic hybridization]] (CGH) | ||
* [[Prenatal screening]] techniques such as [[amniocentesis]] and [[chorionic villus sampling]] | * [[Prenatal screening]] techniques such as [[amniocentesis]] and [[chorionic villus sampling]] | ||
==Treatment and Management== | ==Treatment and Management== | ||
There is no cure for aneuploidy, but management strategies focus on addressing the symptoms and improving the quality of life for affected individuals. This may include: | There is no cure for aneuploidy, but management strategies focus on addressing the symptoms and improving the quality of life for affected individuals. This may include: | ||
* [[Physical therapy]] | * [[Physical therapy]] | ||
* [[Occupational therapy]] | * [[Occupational therapy]] | ||
* [[Speech therapy]] | * [[Speech therapy]] | ||
* Medical interventions for associated health issues | * Medical interventions for associated health issues | ||
==Research== | ==Research== | ||
Ongoing research in the field of genetics aims to better understand the mechanisms behind aneuploidy and develop potential therapies. Studies often focus on the role of aneuploidy in [[cancer]] and other diseases. | Ongoing research in the field of genetics aims to better understand the mechanisms behind aneuploidy and develop potential therapies. Studies often focus on the role of aneuploidy in [[cancer]] and other diseases. | ||
==See also== | ==See also== | ||
* [[Chromosomal disorder]] | * [[Chromosomal disorder]] | ||
| Line 50: | Line 56: | ||
* [[Mitosis]] | * [[Mitosis]] | ||
* [[Nondisjunction]] | * [[Nondisjunction]] | ||
==References== | ==References== | ||
{{Reflist}} | {{Reflist}} | ||
==External links== | ==External links== | ||
{{Commons category|Aneuploidy}} | {{Commons category|Aneuploidy}} | ||
[[Category:Genetics]] | [[Category:Genetics]] | ||
[[Category:Chromosomal abnormalities]] | [[Category:Chromosomal abnormalities]] | ||
[[Category:Medical conditions]] | [[Category:Medical conditions]] | ||
{{Genetics-stub}} | {{Genetics-stub}} | ||
{{medicine-stub}} | {{medicine-stub}} | ||
Latest revision as of 13:58, 4 April 2025
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD's medical weight loss NYC, sleep center NYC
Philadelphia medical weight loss and Philadelphia sleep clinics
| Aneuploidy | |
|---|---|
| |
| Synonyms | N/A |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Varies depending on the specific aneuploidy; may include developmental delays, intellectual disability, physical abnormalities |
| Complications | Increased risk of congenital heart defects, leukemia, infertility |
| Onset | Congenital |
| Duration | Lifelong |
| Types | N/A |
| Causes | Nondisjunction during meiosis or mitosis |
| Risks | Advanced maternal age, family history of aneuploidy |
| Diagnosis | Karyotype analysis, prenatal screening |
| Differential diagnosis | Balanced translocation, mosaicism |
| Prevention | Genetic counseling, preimplantation genetic diagnosis |
| Treatment | Symptomatic and supportive care |
| Medication | N/A |
| Prognosis | Varies widely depending on the specific aneuploidy |
| Frequency | Varies; Down syndrome occurs in approximately 1 in 700 live births |
| Deaths | N/A |
Aneuploidy
Aneuploidy is a condition in which the number of chromosomes in the cell nucleus is not the typical number for the species. This deviation from the normal chromosome number can lead to various genetic disorders and is a significant area of study in genetics and medicine.
Types of Aneuploidy[edit]
Aneuploidy can be classified based on the type of chromosome that is affected and the nature of the numerical change. The main types include:
- Monosomy: The presence of only one chromosome from a pair. An example is Turner syndrome, where there is a single X chromosome.
- Trisomy: The presence of an extra chromosome, resulting in three copies instead of the usual two. Examples include Down syndrome (Trisomy 21), Edwards syndrome (Trisomy 18), and Patau syndrome (Trisomy 13).
- Tetrasomy: The presence of four copies of a chromosome.
- Nullisomy: The absence of both chromosomes from a pair.
Causes[edit]
Aneuploidy typically arises from errors during cell division, specifically during meiosis or mitosis. These errors can include:
- Nondisjunction: The failure of chromosomes to separate properly during cell division.
- Anaphase lag: A chromosome is left behind during cell division and is not included in the daughter cell.
Consequences[edit]
The consequences of aneuploidy can vary widely depending on the specific chromosomes involved and the type of aneuploidy. Some common consequences include:
- Developmental disorders
- Physical abnormalities
- Intellectual disabilities
- Increased risk of certain diseases, such as cancer
Diagnosis[edit]
Aneuploidy can be diagnosed through various genetic testing methods, including:
- Karyotyping
- Fluorescence in situ hybridization (FISH)
- Comparative genomic hybridization (CGH)
- Prenatal screening techniques such as amniocentesis and chorionic villus sampling
Treatment and Management[edit]
There is no cure for aneuploidy, but management strategies focus on addressing the symptoms and improving the quality of life for affected individuals. This may include:
- Physical therapy
- Occupational therapy
- Speech therapy
- Medical interventions for associated health issues
Research[edit]
Ongoing research in the field of genetics aims to better understand the mechanisms behind aneuploidy and develop potential therapies. Studies often focus on the role of aneuploidy in cancer and other diseases.
See also[edit]
References[edit]
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External links[edit]
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