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Related Concept Videos

Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
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Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing
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Published on: February 10, 2023

Mitochondrial DNA haplogroups influence AIDS progression.

Sher L Hendrickson1, Holli B Hutcheson, Eduardo Ruiz-Pesini

  • 1Laboratory of Genomic Diversity, National Cancer Institute, Frederick, Maryland 21702-1201, USA. hendricksons@mail.nih.gov

AIDS (London, England)
|November 14, 2008
PubMed
Summary
This summary is machine-generated.

Mitochondrial DNA variations influence AIDS progression. Certain haplogroups (J, U5a) accelerate disease, while others (Uk, H3, IWX) offer protection in HIV-1 patients.

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Area of Science:

  • Genetics
  • Immunology
  • Cell Biology

Background:

  • Mitochondrial function impacts AIDS progression and antiretroviral therapy toxicity.
  • Mitochondrial DNA (mtDNA) single-nucleotide polymorphisms influence key cellular processes like oxidative phosphorylation, reactive oxygen species (ROS) production, and apoptosis.
  • Understanding mtDNA variation may reveal novel genetic factors influencing AIDS pathogenesis.

Purpose of the Study:

  • To investigate the association between mitochondrial DNA (mtDNA) haplogroups and the rate of AIDS progression.
  • To identify potential genetic markers within mtDNA that correlate with faster or slower disease advancement in HIV-1 infected individuals.

Main Methods:

  • Retrospective cohort study involving 1833 European American HIV-1 patients from five US cohorts.
  • Association study analyzing mitochondrial DNA haplogroups to determine correlation with AIDS progression rate.

Main Results:

  • Mitochondrial DNA haplogroups J and U5a were found at higher frequencies in HIV-1 patients with accelerated progression to AIDS and death.
  • Mitochondrial DNA haplogroups Uk, H3, and IWX showed a protective effect against AIDS progression.

Conclusions:

  • mtDNA variation, affecting ATP production, ROS generation, and apoptosis, is correlated with AIDS disease progression.
  • These findings suggest that specific mitochondrial genes serve as important indicators of AIDS progression in HIV-1 infected individuals.
  • Further research in diverse ethnic cohorts is recommended to validate these associations.