Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.7.7.49 (reverse transcriptase)
 31,746 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Leukocyte trafficking is critically regulated by chemokines and their receptors. The involvement of the skin in certain subsets of T-cell malignancies has been explained by the discovery of an interaction between the thymus and activation-regulated chemokine (TARC), which is abundant in the skin, and its receptor, CC chemokine receptor 4 (CCR4), which is expressed in the tumor cells. We describe a diffuse large B-cell lymphoma (DLBCL) that showed CCR4 expression with involvement of the skin. A 55-year-old man presented with a giant skin ulcer of the right axilla, and his disease was diagnosed as DLBCL. Further clinical examination revealed an ulcerated gastric lymphoma lesion. Immunohistochemical and real-time reverse transcriptase-polymerase chain reaction analyses showed that the tumor cells were positive for CCR4, and TARC was expressed at extremely high levels in the lymphoma-affected skin. These observations suggest that the interaction between CCR4 and TARC played a significant role in the involvement of the skin in this case, similar to what has been observed in certain subsets of T-cell malignancies. To the best of our knowledge, this report is the first of a CCR4-positive B-cell lymphoma. The present case provides new insights into the pathogenesis of skin involvement in B-cell lymphomas.
 ...
PMID:CC chemokine receptor 4-positive diffuse large B-cell lymphoma involving the skin: a case report. 1614 48

Although cadexomer iodine is widely used for the treatment of skin ulcers such as decubitus ulcers, the mechanism by which it enhances wound healing is not clear. Recently, it has been demonstrated that macrophages play an important role in wound healing by inducing inflammation and angiogenesis. We examined the effects of cadexomer and cadexomer iodine on tumor necrosis factor (TNF)-alpha, interleukin (IL)-1 beta, IL-6, IL-8, IL-10, IL-12 p 40, vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) production by macrophages. Human macrophages were obtained by culturing CD14+ monocytes with macrophage colony stimulating factor (M-CSF) in the presence or absence of cadexomer or cadexomer iodine. The production of cytokines and the expression of mRNA were evaluated by enzyme linked immunosorbent assay (ELISA) of the culture supernatants and by reverse transcriptase polymerase chain reaction (RT-PCR) analysis, respectively. In addition, we examined the tissue concentration of VEGF in the wounds treated with or without cadexomer iodine. Cadexomer and cadexomer iodine significantly increased the expression of IL-1 beta, IL-8, TNF-alpha and VEGF mRNA, while they did not affect that of IL-6, IL-10, IL-12 p 40 or bFGF mRNA. In addition, they significantly increased the production of IL-1 beta and TNF-alpha. Although we could not detect increased production of VEGF in the culture supernatants, the western blot analysis of macrophages demonstrated the increased production of VEGF by the treatment with either cadexomer or cadexomer iodine. The treatment with cadexomer iodine increased the tissue concentration of VEGF in the skin wounds. These data suggest that cadexomer and cadexomer iodine have beneficial effects on wound healing in addition to those related to their antibacterial activity.
 ...
PMID:Cadexomer as well as cadexomer iodine induces the production of proinflammatory cytokines and vascular endothelial growth factor by human macrophages. 1735 38

Herein we report the case of a 20-year-old woman who presented with multiple skin ulcers on her legs, severe pansinusitis, and chronic lung disease. She was initially thought to have Wegener's granulomatosis (WG). However, serologic studies indicated an HLA class I deficiency, which was confirmed by flow cytometry. Complementation studies and reverse transcriptase-polymerase chain reaction followed by direct DNA sequencing revealed a mutation in the gene encoding subunit 1 of the peptide transporter associated with antigen processing (TAP1). This mutation, which has not been previously described in the literature, results in a stop codon in the catalytic domain of TAP1. Although TAP mutations are rare, clinicians may encounter them in the evaluation of patients with suspected WG. In patients with WG-like symptoms it is important to consider this alternative genetic diagnosis as early as possible, not only so that appropriate antibiotic therapy can be initiated to prevent bronchiectasis, but also to avoid inappropriate immunosuppressive therapy that worsens the disease.
 ...
PMID:HLA class I deficiency syndrome mimicking Wegener's granulomatosis. 1866 71