YKL-40 expression in CD14+ liver cells in acute and chronic injury

被引:20
|
作者
Pizano-Martinez, Oscar [1 ]
Yanez-Sanchez, Irinea [1 ]
Alatorre-Carranza, Pilar [1 ]
Miranda-Diaz, Alejandra [1 ]
Ortiz-Lazareno, Pablo C. [2 ]
Garcia-Iglesias, Trinidad [1 ]
Daneri-Navarro, Adrian [1 ]
Vazquez-Del Mercado, Monica [1 ]
Fafutis-Morris, Mary [1 ]
Delgado-Rizo, Vidal [1 ]
机构
[1] Univ Guadalajara, CUCS, Dept Physiol, Guadalajara 44340, Jalisco, Mexico
[2] Ctr Invest Biomed Occidente IMSS, Div Immunol, Guadalajara 44340, Jalisco, Mexico
关键词
YKL-40; Kupffer cells; Liver cirrhosis; CD14(+) cells; HEPATIC-FIBROSIS; SERUM YKL-40; BETA; TRANSLOCATION; MACROPHAGES; DISEASE;
D O I
10.3748/wjg.v17.i33.3830
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
AIM: To demonstrate that CD14(+) cells are an important source of the growth factor YKL-40 in acute and chronic liver damage. METHODS: Rats were inoculated with one dose of CCl4 to induce acute damage. Liver biopsies were obtained at 0, 6, 12, 24, 48 and 72 h. For chronic damage, CCl4 was administered three days per week for 6 or 8 wk. Tissue samples were collected, and cellular populations were isolated by liver digestion and purified by cell sorting. YKL-40 mRNA and protein expression were evaluated by real-time polymerase chain reaction and western blot. RESULTS: Acute liver damage induced a rapid increase of YKL-40 mRNA beginning at 12 h. Expression peaked at 24 h, with a 26-fold increase over basal levels. By 72 h however, YKL-40 expression levels had nearly returned to control levels. On the other hand, chronic damage induced a sustained increase in YKL-40 expression, with 7- and 9-fold higher levels at 6 and 8 wk, respectively. The pattern of YKL-40 expression in different subpopulations showed that CD14(+) cells, which include Kupffer cells, are a source of YKL-40 after acute damage at 72 h [0.09 relative expression units (REU)] as well as after chronic injury at 6 wk (0.11 REU). Hepatocytes, in turn, accounted for 0.06 and 0.01 REU after 72 h (acute) or 6 wk (chronic), respectively. The rest of the CD14(-) cells (including T lymphocytes, B lymphocytes, natural killer and natural killer T cells) yielded 0.07 and 0.15 REU at 72 h and 6 wk, respectively. YKL-40 protein expression in liver was detected at 72 h as well as 6 and 8 wk, with the highest expression relative to controls (11-fold; P <= 0.05) seen at 6 wk. Macrophages were stimulated by lipopolysaccharide. We demonstrate that under these conditions, these cells showed maximum expression of YKL-40 at 12 h, with P < 0.05 compared with controls. CONCLUSION: Hepatic CD14(+) cells are an YKL-40 mRNA and protein source in acute and chronic liver injury, with expression patterns similar to growth factors implicated in inflammation-fibrogenesis. (C) 2011 Baishideng. All rights reserved.
引用
收藏
页码:3830 / 3835
页数:6
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