Related Experiment Video
Updated: Jul 18, 2026

10:31
Lymphocyte Isolation from Human Skin for Phenotypic Analysis and Ex Vivo Cell Culture
Published on: April 8, 2016
Expression of telomerase reverse transcriptase in psoriatic lesional skin
Moushira A Mahmoud1, Roshdy W Mohamed, Fadia M Attia
1Department of Biochemistry, Suez Canal University, Ismailia, Egypt. moushiraa@yahoo.com
Disease Markers
|November 25, 2006
Summary
Telomerase mRNA is found in most psoriasis skin lesions and its levels correlate with disease severity and epidermal proliferation. This suggests telomerase may be a useful biomarker for psoriasis.
Area of Science:
- Dermatology
- Molecular Biology
- Biochemistry
Background:
- Psoriasis is a chronic skin disease with limited understanding of telomerase expression.
- Further research is needed to explore telomerase as a potential biomarker for psoriasis.
Purpose of the Study:
- To investigate human telomerase reverse transcriptase (hTERT) expression in psoriatic skin lesions.
- To determine the relationship between hTERT expression and psoriasis severity.
Main Methods:
- Quantification of hTERT-mRNA levels using real-time RT-PCR.
- Analysis of lesional versus nonlesional skin from 24 psoriasis patients.
Main Results:
- hTERT expression was detected in 66.7% of psoriatic lesions, but not in normal skin.
- No correlation found between hTERT levels and patient age or disease duration.
- Significant positive correlation between hTERT-mRNA levels and Psoriasis Area-and-Severity Index (PASI) and scaling scores in positive patients.
Conclusions:
- Telomerase mRNA is detectable in the majority of psoriatic lesional skin.
- hTERT expression in psoriatic skin correlates with disease severity and epidermal proliferation rate.
Related Concept Videos
T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Replicative Cell Senescence
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
