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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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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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Mitochondrial Replacement Therapy: In Whose Interests?

Forough Noohi1,2, Vardit Ravitsky3, Bartha Maria Knoppers1

  • 1CENTRE OF GENOMICS AND POLICY, DEPARTMENT OF HUMAN GENETICS, McGILL UNIVERSITY, MONTREAL, QUEBEC, CANADA.

The Journal of Law, Medicine & Ethics : a Journal of the American Society of Law, Medicine & Ethics
|November 18, 2022
PubMed
Summary
This summary is machine-generated.

Mitochondrial replacement therapy (MRT) prevents mitochondrial DNA diseases. As MRT gains global traction, ethical considerations and responsible clinical use are crucial.

Keywords:
Genetic RelatednessMRTMitochondrial Replacement TherapyReproductive Autonomy

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Area of Science:

  • Genetics
  • Reproductive Medicine
  • Bioethics

Background:

  • Mitochondrial replacement therapy (MRT) is a novel technique designed to prevent the inheritance of mitochondrial DNA diseases.
  • The United Kingdom approved MRT in 2015, followed by Australia in 2021, establishing regulatory frameworks for its clinical application.
  • The global expansion of MRT necessitates a thorough examination of its responsible implementation.

Purpose of the Study:

  • To highlight the importance of evaluating the responsible use of mitochondrial replacement therapy.
  • To underscore the ethical challenges associated with the clinical translation of MRT.
  • To address the need for ethical discourse as MRT adoption grows globally.

Main Methods:

  • Review of regulatory approvals for MRT in different countries.
  • Analysis of the evolving clinical landscape of MRT.
  • Examination of ethical issues pertinent to MRT's clinical application.

Main Results:

  • MRT has seen regulatory approval in select countries, indicating its clinical advancement.
  • The global adoption of MRT is accelerating, presenting new challenges.
  • Ethical considerations are paramount due to varying reproductive laws worldwide.

Conclusions:

  • The rapid clinical progression of MRT demands urgent ethical evaluation and guidelines for responsible use.
  • Addressing the ethical implications of MRT is fundamental, especially in regions with less stringent reproductive regulations.
  • Continued dialogue on the ethical aspects of MRT is essential for its safe and responsible clinical translation.