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Related Concept Videos

Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

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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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A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
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Mitochondrial transfer: Implications for assisted reproductive technologies.

A S Reznichenko1, C Huyser2, M S Pepper3

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|December 27, 2016
PubMed
Summary
This summary is machine-generated.

Mitochondrial transfer techniques, including pronuclear, spindle, ooplasmic, and blastomere transfer, are nearing clinical reality for preventing mitochondrial DNA diseases and improving fertility. Research analyzes their safety, efficacy, and potential applications in human and animal studies.

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Area of Science:

  • Reproductive Medicine and Genetics
  • Mitochondrial Biology
  • Developmental Biology

Background:

  • Mitochondrial DNA (mtDNA) diseases pose significant health challenges.
  • Mitochondrial transfer offers potential therapeutic strategies for preventing mtDNA disease transmission.
  • Clinical application of these techniques requires careful consideration of safety and efficacy.

Approach:

  • Overview of established and novel mitochondrial transfer techniques: pronuclear, spindle, ooplasmic, and blastomere transfer.
  • Analysis of technique suitability for mtDNA disease prevention, including advantages and disadvantages.
  • Evaluation of success rates, embryo viability, and developmental outcomes from animal and human studies.

Key Points:

  • Mitochondrial transfer techniques are advancing towards clinical use.
  • Technique selection impacts mtDNA disease prevention efficacy.
  • Potential adverse effects on embryos and offspring are a key concern.
  • Mitochondrial-nuclear genome compatibility is addressed.
  • Fertility enhancement and personalized stem cell generation are additional applications.

Conclusions:

  • Mitochondrial transfer techniques show promise for preventing inherited mitochondrial diseases.
  • Further research is needed to ensure safety and optimize outcomes for clinical application.
  • Somatic cell nuclear transfer offers an alternative therapeutic avenue for existing mitochondrial diseases.