真性红细胞增多症患者骨髓CD34阳性细胞凋亡及增殖特征研究

目的　了解真性红细胞增多症 (PV)患者骨髓CD34 阳性细胞的凋亡、增殖情况。方法　应用双色流式细胞仪检测 2 0例PV患者及 10例原发性血小板增多症 (ET)患者和 12名正常人骨髓CD34 阳性细胞AnnexinⅤ以及细胞增殖相关抗原Ki6 7的表达情况并分析其与PV临床表现的相关性。结果　PVCD34 阳性细胞AnnexinⅤ表达率为 (15 .96± 1.4 5 ) % ,ET为 (15 .5 3± 1.76 ) % ,明显低于正常对照组的 (2 3.6 1± 3.89) % (P <0 .0 5 ) ;CD34 阳性细胞Ki6 7表达率PV为 (4 8.79± 11.6 8) % ,ET为 (4 9.6 0±9.98) % ,明显高于正常对照组的 (33.87± 6 .82 ) % (P <0 .0 1) ;凋亡增殖比PV为 0 .33± 0 .10 ,ET为 0 .32± 0 .0 2 ,明显低于正常对照组的 0 .72± 0 .11(P <0 .0 1) ;CD34 阳性细胞凋亡与血红蛋白、白细胞计数、内源性红系集落呈负相关 (分别r=- 0 .4 81,P =0 .0 37;r=- 0 .5 38,P =0 .0 2 6 ;r=- 0 .6 32 ,P =0 5 0 )。凋亡增殖比与血红蛋白、白细胞计数呈负相关 (分别r=- 0 .5 37,P =0 .0 18;r=- 0 .6 6 7,P =0 0 0 3)。结论　PV患者骨髓CD34 阳性细胞有低凋亡及高增殖特点 ,低凋亡与疾病严重度相关。

Apoptosis and proliferation of CD34 positive bone marrow cells in patients with polycythemia vera

OBJECTIVE: To study the apoptosis and proliferation of CD(34) positive (CD(34)(+)) bone marrow cells (BMC) in patients with polycythemia vera (PV). METHODS: The expression of Annexin V and Ki67 of the CD(34)(+) BMC in 20 PV patients and control cases 10 essential thrombocythemia (ET), 12 normal persons] were assessed by bicolor flow cytometry (FCM), and the correlation between apoptosis and clinical situation was analysed in PV patients. RESULTS: The Annexin V expressions of CD(34)(+) BMC were (15.96 +/- 1.45)% in PV patients and (15.53 +/- 1.76)% in ET patients which were lower than that in normal subjects (23.61 +/- 3.89)%, (P < 0.05)]. The Ki67 expression of CD(34)(+) BMC was (48.79 +/- 11.68)% in PV patients and (49.60 +/- 9.98)% in ET patients, which were significantly higher than that in normal controls (33.87 +/- 6.82)%. The ratio of apoptosis/proliferation in PV patients was 0.33 +/- 0.10 and in ET patients 0.32 +/- 0.02 which were significantly lower than that in normal controls 0.72 +/- 0.11 (P < 0.01). The apoptosis of CD(34)(+) BMC was negatively correlated with the hemoglobin (Hb) levels (r = -0.481, P = 0.037), white blood cells (WBC) (r = -0.538, P = 0.026) and the numbers of endogenous erythroid colony (EEC) (r = -0.632, P = 0.50), and the ratio of apoptosis/proliferation was negatively correlated with the Hb (r = -0.537, P = 0.018) and WBC (r = -0.667, P = 0.003) in PV patients. CONCLUSION: There were lower apoptosis and higher proliferation in CD(34)(+) BMC of PV patients. Lower apoptosis was correlated with the severity of the disease.