[Study on the relationship of the haplotypes of programmed cell death 1 gene and ultraviolet history with systemic lupus erythematosus].

Objective: To investigate the relationship of gene polymorphisms of programmed cell death 1 gene (PDCD1) and ultraviolet history with systemic lupus erythematosus (SLE) among the Han population in the southern region of yangtze river in China.

Methods: With a case control design, a total of 159 SLE cases and 159 controls were enrolled in this study, and single nucleotide polymorphisms (SNPs) of the PDCD1 gene were determined by PCR-restriction fragment length polymorphism (RFLP). With the aid of the logistic regression model, the effect of gene polymorphism, environmental factor and the interaction between gene and environment were fitted under the recessive, dominant, additive and codominant mode, respectively.

[Interactions between susceptible genes and risk environmental factors in Chinese females with systemic lupus erythematosus].

Objective: To explore the interactions of gene polymorphisms of cytotoxic T lymphocyte antigen 4 (CTLA-4) and programmed cell death 1 (PDCD-1) with risk environmental factors in individuals with systemic lupus erythematosus (SLE) from Han nationality female population in South of Changjiang River region of China.

Methods: With a case-only design, a total of 258 cases were enrolled in this study, and single nucleotide polymorphisms (SNPs) of the PDCD-1 and CTLA-4 genes were determined by means of PCR-RFLP. With the aid of Poisson loglinear mode, interactions between gene-gene and gene-environment were fitted under the dominant, recessive, additive and multiple models, respectively.

[Tripterine inhibits all-trans retinoic acid-caused adhesion between leukemia cells and endothelial cells].

Objective: Increasing of adhesion between leukemia cells and endothelial cells during all-trans retinoic acid (ATRA) treatment plays an important role in retinoic acid syndrome. This work observed the effects of tripterine on this ATRA-caused increasing in adhesion.

Methods: The effects of tripterine on ATRA-induced expressions of adhesive molecules in acute promyelocytic leukemia cell line NB4 and human umbilical vascular endothelial cells (HUVEC) were detected by flow cytometry.

Tripterine inhibits the expression of adhesion molecules in activated endothelial cells.

Cell adhesion molecules (CAM) expressed by vascular endothelium in response to cytokine stimulation play a key role in leukocyte adhesion to endothelium during the inflammatory response. Tripterine, a chemical compound of the Chinese plant Tripterygium wilfordii Hook f, displays anti-inflammatory properties in several animal models. However, mechanisms of its action are poorly understood.