Related Experiment Video
Updated: May 19, 2026
07:32
A Double Humanized BLT-mice Model Featuring a Stable Human-Like Gut Microbiome and Human Immune System
Published on: August 30, 2019
Human more complex than mouse at cellular level.
1Institute of Cytology, Russian Academy of Sciences, St.Petersburg, Russia. aevin@mail.cytspb.rssi.ru
Plos One
|August 23, 2012
Summary
Human cells express more C2H2-zinc finger (ZF) genes, particularly KRAB-domain containing ones, than mouse cells. This expansion correlates with anatomical complexity and brain development, while cancer cells show reduced expression.
Area of Science:
- Genomics
- Evolutionary Biology
- Molecular Biology
Background:
- The C2H2 zinc finger (ZF) transcription factor family is crucial for gene regulation and has expanded significantly in vertebrates, especially mammals.
- Mammals, like primates, exhibit greater anatomical complexity compared to rodents, raising questions about the role of C2H2-ZF gene expression in development and disease.
Purpose of the Study:
- To investigate the differential expression of C2H2-ZF genes in human versus mouse cells.
- To explore the correlation between C2H2-ZF gene expression, anatomical complexity, and cellular differentiation (embryogenesis, nervous system, cancer).
Main Methods:
- Comparative analysis of C2H2-ZF gene expression in human and mouse cellular transcriptomes.
- Examination of gene expression patterns across different tissues (brain, embryonic, cancer) and correlation with genomic content.
- Analysis of evolutionary turnover (gene duplication and loss) of C2H2-ZF genes.
Main Results:
- Human cells exhibit higher expression of C2H2-ZF genes, particularly those with a KRAB domain, compared to mouse cells.
- The relative increase in expressed C2H2-ZF(-KRAB) genes in humans surpasses the genomic difference, indicating a greater utilization of the gene repertoire.
- Expression is elevated in brain and embryonic cells, but reduced in cancer cells, suggesting a role in development and a link to oncogenesis.
Conclusions:
- Increased anatomical complexity in primates is associated with more complex intracellular regulation mediated by C2H2-ZF transcription factors.
- Malignization correlates with a simplification of this regulatory network, potentially explaining human cell resistance to oncogenic transformation.
- Identified specific C2H2-ZF genes whose suppression may be implicated in cancer development.
Related Concept Videos
02:43Mouse Models of Cancer Study
Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
01:18Structural Organization of the Human Body: An Overview
It is convenient to consider the body's structures in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, and organisms.
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
01:56Gastrulation
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...