Related Experiment Video

Updated: Aug 12, 2026

An In Vitro Approach to Study Mitochondrial Dysfunction: A Cybrid Model
06:05

An In Vitro Approach to Study Mitochondrial Dysfunction: A Cybrid Model

Published on: March 9, 2022

Mitochondrial inheritance and disease

P E Fine

    Lancet (London, England)
    |September 23, 1978
    PubMed

    Insights

    Mitochondrial DNA variants may cause human diseases, especially blood disorders linked to chloramphenicol. These conditions, inherited maternally, appear in related individuals and depend on mitochondrial distribution during development.

    Area of Science:

    • Mitochondrial genetics
    • Human disease etiology
    • Pharmacogenomics

    Background:

    • Mitochondria possess their own DNA (mtDNA) which can undergo spontaneous mutations.
    • Mitochondrial dysfunction is implicated in various human pathologies.
    • Certain drug toxicities, like chloramphenicol-induced blood dyscrasias, suggest a mitochondrial role.

    Purpose of the Study:

    • To explore the potential role of mitochondrial DNA (mtDNA) variants in human diseases.
    • To investigate the hypothesis that drug-induced blood dyscrasias, specifically chloramphenicol toxicity, may stem from mtDNA defects.
    • To understand the inheritance patterns and developmental factors influencing the manifestation of mitochondrial diseases.

    Main Methods:

    • Analysis of mtDNA in patients with suspected mitochondrial disorders.
    • Review of clinical data for drug-induced blood dyscrasias.
    • Pedigree analysis to trace maternal inheritance patterns.
    • Developmental biology principles applied to mitochondrial distribution.

    Main Results:

    • Spontaneous mtDNA variants are proposed as a cause of human disease.
    • Chloramphenicol-induced blood dyscrasias are highlighted as a key candidate for mitochondrial etiology.
    • Matroclinous inheritance is predicted for such mitochondrial disorders.
    • Clinical presentation is linked to the developmental allocation of mitochondria to tissues.

    Conclusions:

    • Mitochondrial DNA mutations represent a significant etiological factor in human diseases.
    • Drug-induced blood dyscrasias, particularly chloramphenicol toxicity, warrant further investigation as mitochondrial disorders.
    • Understanding maternal inheritance and developmental mitochondrial distribution is crucial for diagnosing and managing these conditions.

    More Related Videos

    Transmitochondrial Cybrid Generation Using Cancer Cell Lines07:49

    Transmitochondrial Cybrid Generation Using Cancer Cell Lines

    Published on: March 17, 2023

    Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models08:48

    Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models

    Published on: June 30, 2023

    Related Concept Videos

    Pedigree Analysis01:35

    Pedigree Analysis

    Overview
    Non-nuclear Inheritance01:29

    Non-nuclear Inheritance

    Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
    Non-nuclear Inheritance01:29

    Non-nuclear Inheritance

    Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
    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...
    Genomic Imprinting and Inheritance02:30

    Genomic Imprinting and Inheritance

    Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
    The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
    Mitochondria01:37

    Mitochondria

    Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...