Publications by authors named "Alejandra Velez"
Article Synopsis
- CD4+ T cells are crucial for the immune system, but their exact function is not fully understood, particularly the role of the CD4 protein itself.
- Researchers studied seven patients with a rare genetic condition causing CD4 deficiency, leading to various infections, and found that these individuals lacked CD4+ T cells but had alternative T cell populations that could still mount immune responses.
- While the patients showed compensatory immune responses against many pathogens, CD4 remains essential for protection against specific infections like human papillomavirus and Whipple's disease.
Introduction: The HLA region strongly associates with autoimmune diseases, such as type 1 diabetes. An alternative way to test classical HLA alleles is by using tag SNP. A set of tag SNP for several classical HLA alleles has been reported as associated with susceptibility or resistance to this disease in Europeans.
View Article and Find Full Text PDFIntroduction: Common variable immunodeficiency is a heterogeneous syndrome characterized by recurrent infections, hypogammaglobulinemia and defective production of specific antibodies. Abnormalities in peripheral blood lymphocyte subpopulations, in particular of B lymphocytes, allow the classification of patients into homogeneous groups.
Objective: To perform a clinical and immunological characterization and to evaluate lymphocyte subpopulations of twelve Colombian patients with common variable immunodeficiency in order to define homogeneous groups.