Secondary lymphoid organs (SLOs) provide a niche for the initiation and regulation of T-cell responses, but the mechanisms have been poorly understood. We investigated the influence of chemokines CCL19 and CCL21 constitutively expressed in SLOs on activation-induced cell death (AICD) of CD4+ T cells. When paucity of lymph node T cells (plt) mutant mice lacking expression of CCL19/CCL21 were pri...

Malignant lymphocyte migration into lymph nodes is an important aspect of chronic lymphocytic leukemia (CLL), yet little is known about the processes involved. Here we demonstrate that CLL cells migrate across vascular endothelium in response to at least 3 chemokines, namely, CCL21, CCL19, and CXCL12. Moreover, transendothelial cell migration (TEM) in response to CCL21 and CCL19 was significant...

Developing robust in vitro models of HIV latency is needed to better understand how latency is established, maintained and reversed. In this study, we examined the effects of donor variability, HIV titre and co-receptor usage on establishing HIV latency in vitro using two models of HIV latency. Using the CCL19 model of HIV latency, we found that in up to 50% of donors, CCL19 enhanced latent inf...

Objective(s): Berberine is one of the main alkaloids and it has been proven to have different pharmacological effects including inhibition of cell cycle and progression of apoptosis in various cancerous cells; however, its effects on cancer metastasis are not well known. Cancer cells obtain the ability to change their chemokine system and convert into metastatic cells. In this study, we examine...

Dendritic cell (DC) migration from the site of infection to the site of T-cell priming is a crucial event in the generation of antiviral T-cell responses. Here we present to our knowledge the first functional evidence that human cytomegalovirus (HCMV) blocks the migration of infected monocyte-derived DCs toward lymphoid chemokines CCL19 and CCL21. DC migration is blocked by viral impairment of ...

background: genetic variation influences susceptibility/resistance to tuberculosis. cxcl10 is involved in t-cell migration and stimulation of natural killer cells in mycobacterium tuberculosis infection. objectives: we aimed to investigate the genetic polymorphisms in promoter of the cxcl10 gene in patients with pulmonary tuberculosis (ptb) and healthy controls, to clarify whether polymorphisms...

Chemokines displayed on the luminal surface of blood vessels play pivotal roles in inflammatory and homeostatic leukocyte trafficking in vivo. However, the mechanisms underlying the functional regulation of chemokines on the endothelial cell surface remain ill-defined. A promiscuous chemokine receptor, the Duffy antigen receptor for chemokines (DARC), has been implicated in the regulation of ch...

chemokines are biologically active peptides involved in the pathogenesis of various pathologies including brain malignancies. they are amongst primitive regulators of the development of immune responses against malignant glial tumors. the present study aimed to examine the expression of cc chemokines in anaplastic astrocytoma and glioblastoma multiform patients at both mrna and protein levels. ...

Abstract Background and Aims Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by immune-complex deposits inflammatory cell infiltrations in multiple organs, approximately half of patients have nephritis. Lymphangiogenesis the proliferation pre-existing lymphatic vessels (LVs), which regulate tissue fluid homeostasis immune trafficking, responding to environment. ...