• 제목/요약/키워드: CaHDR

검색결과 2건 처리시간 0.016초

Molecular cloning and characterization of 1-hydroxy-2-methyl-2-(E)-butenyl 4-diphosphate reductase (CaHDR) from Camptotheca acuminata and its functional identification in Escherichia coli

  • Wang, Qian;Pi, Yan;Hou, Rong;Jiang, Keji;Huang, Zhuoshi;Hsieh, Ming-shiun;Sun, Xiaofen;Tang, Kexuan
    • BMB Reports
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    • 제41권2호
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    • pp.112-118
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    • 2008
  • Camptothecin is an anti-cancer monoterpene indole alkaloid. The gene encoding 1-hydroxy-2-methyl-2-(E)-butenyl 4-diphosphate reductase (designated as CaHDR), the last catalytic enzyme of the MEP pathway for terpenoid biosynthesis, was isolated from camptothecin-producing Camptotheca acuminata. The full-length cDNA of CaHDR was 1686 bp encoding 459 amino acids. Comparison of the cDNA and genomic DNA of CaHDR revealed that there was no intron in genomic CaHDR. Southern blot analysis indicated that CaHDR belonged to a low-copy gene family. RT-PCR analysis revealed that CaHDR expressed constitutively in all tested plant organs with the highest expression level in flowers, and the expression of CaHDR could be induced by 100 ${\mu}M$ methyl-jasmonate (MeJA), but not by 100 mg/L salicylic acid (SA) in the callus of C. acuminata. The complementation of CaHDR in Escherichia coli ispH mutant MG1655 demonstrated its function.

원격조정 고선량 기관지내 근접 치료 (Remote Afterloading Hish Dose Rate (HDR) Endobronchia1 Brachytherapy)

  • 장혜숙;최은경;이병용;김원동;김우성;고윤석
    • Radiation Oncology Journal
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    • 제9권2호
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    • pp.227-232
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    • 1991
  • 기관지 폐색으로 호흡곤란을 유발하는 기관지내 악성종양을 치료하기 위한 방사선 치료방법으로 고선량 기관지내 근접치료법이 본원에서 시행되었다. 기관지 내시경 시술을 이용하여 근접치료용 관을 기관지 내로 삽입하며 microSelectron HDR Ir-192를 이용하여 고선량 근접치료를 시행하였다. 이 논문에서 저자들의 경험을 소개하고 이 새로운 근접치료 시술이 효과적이면서도 외래 환자로 통근 치료도 가능할 정도로 용이하고 안전한 치료법으로 자세한 기술적 인 점을 설명하고자 한다.

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