慢性乙型肝炎患者自然杀伤细胞干扰素γ的表达及其与病情的关系

目的 探讨NK细胞在慢性乙型肝炎患者发病中的作用.方法 收集慢性乙型肝炎108例,其中轻度43例,中度28例,重度37例.流式细胞胞内细胞因子染色法检测肝组织、外周血NK细胞分泌IFNγ的水平.数据行t检验.结果 CHB重度患者肝组织、外周血NK细胞IFNγ的分泌水平为(8.12±4.26)%、(4.59±2.95)%,显著高于CHB轻度患者的(3.53±1.56)%和(2.26±0.61)%(t=3.80,t=4.30;均P<0.05),也高于CHB中度患者的(4.59±1.98)%和(2.48±1.05)%(t=2.62,t=3.28;均P<0.05).但CHB轻,中度之间肝组织、外周血NK细胞IFNγ的分泌水平差异无统计学意义(t=0.99,t=1.27;P>0.05);CHB重度重症期患者肝组织和外周血NK细胞IFNγ的分泌水平为(10.02±4.15)%和(6.78±2.91)%,恢复期为(6.13±2.01)%和(3.13±1.52)%(t=1.89,t=1.74;P<0.05).结论 NK细胞在乙型肝炎的发病中可能有加重病情的作用.

Abstract：

Objective To investigate the role of natural killer cells (NK cells) in patients with chronic hepatitis B (CHB). Methods Blood samples and liver biopsies from 108 CHB patients including 43 mild, 28 moderate and 37 severe CHB patients were collected. The levels of interferon (IFN) gamma in liver tissues and peripheral blood were detected by intracellular cytokine staining.The data were analyzed by t test. Results The levels of IFN gamma produced by NK cells in liver tissues and peripheral blood of patients with severe CHB were (8. 12±4. 26) % and (4. 59±2. 95) % ,respectively, which were significantly higher than those in patients with mild CHB [(3. 53±1. 56)%and (2. 26±0.61)%, respectively; t=3. 80 and t = 4. 30, respectively; both P<0. 05] and those in patients with moderate CHB [(4. 59±1. 98)% and (2. 48±1. 05)%, respectively;t=2. 62 and t =3. 28, respectively; both P<0. 05]. While there were no differences of IFN gamma produced by NK cells both in liver tissues and peripheral blood between mild and moderate CHB patients (t=0. 99 and t=1. 27, respectively; both P>0. 05). The levels of IFN gamma produced by NK cells in liver tissues and blood samples in severe phase of severe CHB were (10. 02 ± 4. 15)% and (6. 78 + 2. 91)%, respectively, those in recovery phase were (6. 13±2. 01)% and (3. 13± 1. 52)%, respectively (t = 1. 89 and t=1. 74, respectively; both P<0. 05]. Conclusion NK cells may play a pivotal role in the pathogenesis of severe CHB.

Expressions and significance of interferon gamma produced by natural killer cells in patients with chronic hepatitis B

Objective To investigate the role of natural killer cells (NK cells) in patients with chronic hepatitis B (CHB). Methods Blood samples and liver biopsies from 108 CHB patients including 43 mild, 28 moderate and 37 severe CHB patients were collected. The levels of interferon (IFN) gamma in liver tissues and peripheral blood were detected by intracellular cytokine staining.The data were analyzed by t test. Results The levels of IFN gamma produced by NK cells in liver tissues and peripheral blood of patients with severe CHB were (8. 12±4. 26) % and (4. 59±2. 95) % ,respectively, which were significantly higher than those in patients with mild CHB [(3. 53±1. 56)%and (2. 26±0.61)%, respectively; t=3. 80 and t = 4. 30, respectively; both P<0. 05] and those in patients with moderate CHB [(4. 59±1. 98)% and (2. 48±1. 05)%, respectively;t=2. 62 and t =3. 28, respectively; both P<0. 05]. While there were no differences of IFN gamma produced by NK cells both in liver tissues and peripheral blood between mild and moderate CHB patients (t=0. 99 and t=1. 27, respectively; both P>0. 05). The levels of IFN gamma produced by NK cells in liver tissues and blood samples in severe phase of severe CHB were (10. 02 ± 4. 15)% and (6. 78 + 2. 91)%, respectively, those in recovery phase were (6. 13±2. 01)% and (3. 13± 1. 52)%, respectively (t = 1. 89 and t=1. 74, respectively; both P<0. 05]. Conclusion NK cells may play a pivotal role in the pathogenesis of severe CHB.