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Distribution of ~(99)Tc~m-rh-Annexin Ⅴ in Tumor and Expression Relationship of bcl-2, bax After a Single Dose of Chemotherapy

ZHANG Xin1, LI Ya-ming1, ZHANG Yan-jun2, JI Xiao-peng3,TAO Li2, ZHANG Jian-ying4,ZHAO Zhen-zhen4, ZHU Yi2, YANG Chun2, ZHAO Ming3, TIAN Ai-juan3(1.Department of Nuclear Medicine, The First Hospital Affiliated to Dalian Medical University, Dalian 116011, China; 2. Department of Nuclear Medicine, The First Hospital Affiliated to China Medical University, Shenyang 110001, China;3.Department of Nuclear Medicine, The Second Hospital Affiliated to Dalian Medical University, Dalian 116023, China;4. Key Laboratory of Radiopharmaceuticals (Beijing Normal University ), Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China)  
The expression of bcl-2 and bax after the single dose of chemotherapy with 99Tcm-rh-AnnexinV as the tracer of tumor apoptosis imaging is studied. Tumor cell apoptosis is examined by TUNEL methods, and the expression of bcl-2 and bax in tumor are determined by immunohistochemical methods. Single dose of chemotherapy significantly increased the tumor uptake of 99Tcm-rh-annexinⅤ and the positive number of TUNEL, as well as the expression of bax (P0.01). The expression of bcl-2/bax is significantly higher in contrast group than in therapy group (P0.01). The radio-uptake in tumor correlates well with the positive number of TUNEL in contrast group and therapy group(r=0.801, r=0.769). In therapy group, the expression of bax correlates well with the uptake and the positive number of TUNEL(r=0. 849, r=0.652), but the bcl-2/bax correlates negatively with radio-uptake and the positive number of TUNEL(r=-0. 820, r=-0. 694). The distribution of 99Tcm -rh-annexin Ⅴ in tumor reflectes not only the degree of apoptosis of tumor cells, but also the change of bax expression after the single dose of chemotherapy.
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