Objective: This study was designed to explore the diagnosis on Down syndrome by fluorescence in situ hybridization (FISH). Methods: We detected trisomy 21 with Down syndrome cristical region cosmid DNA probe, which co...Objective: This study was designed to explore the diagnosis on Down syndrome by fluorescence in situ hybridization (FISH). Methods: We detected trisomy 21 with Down syndrome cristical region cosmid DNA probe, which comes from specific KU21D library of chromosome 21 (carrier is 6.7 kb, insert sequence is 35 kb) and is located in 21q22.2. 48 cases of trisomy 21 were detected on cultured and uncultured lymphoblastoid cell by FISH. Results: There were three hybridization points in interphase nuclei and three hybridization signals on metaphase three chromosome 21. Hybridization rate was 81%~95%. Conclusion: Trisomy 21 could be diagnosed rapidly and accurately by DSCR Cosmid DNA probe in uncultured lymphoblastoid interphase unclei of patients.展开更多
神经母细胞瘤(NB)是儿童时期常见的恶性肿瘤之一。发病隐匿,致使70%的病例在临床被发现时已为时过晚,丧失治疗良机。因此,对 NB 的早期发现颇为关键。NB 和正常交感神经细胞一样,摄取血中酪氨酸并生成儿茶酚胺(CA)。CA 最终代谢产物—...神经母细胞瘤(NB)是儿童时期常见的恶性肿瘤之一。发病隐匿,致使70%的病例在临床被发现时已为时过晚,丧失治疗良机。因此,对 NB 的早期发现颇为关键。NB 和正常交感神经细胞一样,摄取血中酪氨酸并生成儿茶酚胺(CA)。CA 最终代谢产物—香草扁桃酸(VMA)、高香草酸(HVA)、香草乳酸(VLA)均排泄于尿中。在正常人尿中含量极少,而在 NB 病人尿中明显升高。双向纸层析法可检测病人尿中三种代谢产物的存在,对 NB 的早期诊断具有重要意义。展开更多
文摘Objective: This study was designed to explore the diagnosis on Down syndrome by fluorescence in situ hybridization (FISH). Methods: We detected trisomy 21 with Down syndrome cristical region cosmid DNA probe, which comes from specific KU21D library of chromosome 21 (carrier is 6.7 kb, insert sequence is 35 kb) and is located in 21q22.2. 48 cases of trisomy 21 were detected on cultured and uncultured lymphoblastoid cell by FISH. Results: There were three hybridization points in interphase nuclei and three hybridization signals on metaphase three chromosome 21. Hybridization rate was 81%~95%. Conclusion: Trisomy 21 could be diagnosed rapidly and accurately by DSCR Cosmid DNA probe in uncultured lymphoblastoid interphase unclei of patients.
文摘神经母细胞瘤(NB)是儿童时期常见的恶性肿瘤之一。发病隐匿,致使70%的病例在临床被发现时已为时过晚,丧失治疗良机。因此,对 NB 的早期发现颇为关键。NB 和正常交感神经细胞一样,摄取血中酪氨酸并生成儿茶酚胺(CA)。CA 最终代谢产物—香草扁桃酸(VMA)、高香草酸(HVA)、香草乳酸(VLA)均排泄于尿中。在正常人尿中含量极少,而在 NB 病人尿中明显升高。双向纸层析法可检测病人尿中三种代谢产物的存在,对 NB 的早期诊断具有重要意义。