| Autor: |
Shakerian L; Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran. shakerian.l@gmail.com., Pourpak Z; Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran. Pourpakz@tums.ac.ir., Shamlou S; Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran. somayeh.shamlou@gmail.com., Domsgen E; ImmunoIVD, Nacka Strand, Nacka, Sweden. ed@mabtechdiagnostics.com., Kazemnejad A; Department of Biostatistics, Tarbiat Modares University, Tehran, Iran. KAZEM_AN@modares.ac.ir., Dalili H; Breastfeeding Research Center, Tehran University of Medical Sciences, Tehran, Iran. hoseindalili@yahoo.com., Nourizadeh M; Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran. nourizadeh.maryam@gmail.com. |
| Abstrakt: |
Assessment of the number of T-cell receptor excision circles (TREC) and kappa-deleting recombination excision circles (KREC) copies has been recently described as biomarkers of newly formed T and B cells respectively. In this study, we aimed to explore the effects of demographic variables including age, gender, weight, height and ethnicity on these two episomal DNA molecules. Second, for the first time in our country, we determined the reference values of TREC and KREC copy numbers in different age groups of Iranian healthy individuals as a threshold for identifying T cell and B cell lymphopenia. The TREC and KREC copy numbers were evaluated in 251 dried blood spot (DBS) samples from healthy volunteers (age range: 0-60 years). Six primary immunodeficiency (PID) patients were included as disease controls. TREC and KREC copies were markedly reduced with increasing age. Although the levels of TREC and KREC were higher in females than males, this difference did not reach statistical significance. These findings suggest that demographic variables including age should be considered for interpretation results of the TREC/KREC assay. |
