• 제목/요약/키워드: fludarabine

검색결과 5건 처리시간 0.02초

DNA 사슬 종결형 항암제인 플루다라빈에 의해 유도된 세포독성에 대한 아로니아-홍삼 에탄올 혼합 추출물의 효과 (Effects of Aronia melanocarpa and Korean Red Ginseng Ethanol Extracts Combination on Cytotoxicity induced by Fludarabine, a DNA Chain Terminating Anti-Cancer Drug)

  • 김민섭;정유헌;오홍근;박종군
    • 한국식품영양학회지
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    • 제30권4호
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    • pp.673-680
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    • 2017
  • Fludarabine, a chain terminating anti-cancer drug, is a purine analogue that causes DNA strand breaks in normal cells. In this study, we determined if A. melanocarpa and Korean red ginseng extract mixture reduce cytotoxicity of fludarabine. Treatment of HaCaT cells with $10{\mu}M$ of fludarabine for 24 hours decreased cell viability and increased DNA strand breaks. Treatment of A. melanocarpa and Korean red ginseng extract mixture for 24 hours increased cell viability as compared with single extract treatment. The protective effect of these extracts on cell activity increased in a concentration-dependent manner. DNA strand breaks induced by fludarabine decreased as concentration of extract mixture increased. p-H2AX level, a marker of DNA strand breakage, decreased depending on the concentration of extract mixture. The effect of mixed extract of A. melanocarpa and Korean red ginseng on DNA damage is due to the anti-oxidative effect of A. melanocarpa and signal transmission through glucocorticoid receptor upon binding of saponin of Korean red ginseng.

Fludarabine and Rituximab in Relapsed or Refractory Hairy Cell Leukmia Variant: A Case Report and Review of Literature

  • Lee, Ji Won;Choi, Youn Mi;Yang, Jae Yun;Han, Seung Moon;Kim, Bong Seog;Nam, Seung-Hyun
    • 고신대학교 의과대학 학술지
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    • 제33권3호
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    • pp.438-445
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    • 2018
  • Hairy cell leukemia (HCL) is a rare chronic B cell leukemia morphologically characterized by cells with an abundant cytoplasm and hair-like projections that can be found in the peripheral blood and bone marrow. The treatment for HCL is splenectomy or chemotherapy with the purine analogs pentostatin and cladribine. However, patients continue to relapse. Retreatment with the same or alternate purine analogs produces lower response rates and a shorter duration of response. Fludarabine is another purine analog widely used in treating indolent lymphoid cancers, often in combination with rituximab. Here, we report a case of HCL variant in a 60-year-old man who experienced multiple relapses after splenectomy and retreatment with cladribine. The patient was then treated with fludarabine and rituximab combination chemotherapy. After the treatment, he achieved complete remission that continued for 35 months.

Targeted busulfan and fludarabine-based conditioning for bone marrow transplantation in chronic granulomatous disease

  • Ju, Hee Young;Kang, Hyoung Jin;Hong, Che Ry;Lee, Ji Won;Kim, Hyery;Song, Sang Hoon;Yu, Kyung-Sang;Jang, In-Jin;Park, June Dong;Park, Kyung Duk;Shin, Hee Young;Kim, Joong-Gon;Ahn, Hyo Seop
    • Clinical and Experimental Pediatrics
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    • 제59권sup1호
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    • pp.57-59
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    • 2016
  • Chronic granulomatous disease (CGD) is a primary immunodeficiency disease caused by impaired phagocytic function. Hematopoietic stem cell transplantation (HSCT) is a definitive cure for CGD; however, the use of HSCT is limited because of associated problems, including transplantation-related mortality and engraftment failure. We report a case of a patient with CGD who underwent successful HSCT following a targeted busulfan and fludarabine reduced-toxicity myeloablative conditioning. Intravenous busulfan was administered once daily for 4 consecutive days (days -8 to -5), and the target area under the curve was $75,000{\mu}g{\cdot}hr/L$. Fludarabine ($40mg/m^2$) was administered once daily for 6 consecutive days from days -8 to -3. Antithymocyte globulin (2.5 mg/kg/day) was administered from days -4 to -2. The patient underwent successful engraftment and did not have any severe toxicity related to the transplantation. Conditioning with a targeted busulfan and fludarabine regimen could provide a better outcome for HSCT in CGD, with close regulation of the busulfan dose.

Role of Tumor Necrosis Factor-Producing Mesenchymal Stem Cells on Apoptosis of Chronic B-lymphocytic Tumor Cells Resistant to Fludarabine-based Chemotherapy

  • Valizadeh, Armita;Ahmadzadeh, Ahmad;Saki, Ghasem;Khodadadi, Ali;Teimoori, Ali
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권18호
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    • pp.8533-8539
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    • 2016
  • Background: B-cell chronic lymphocytic leukemia B (B-CLL), the most common type of leukemia, may be caused by apoptosis deficiency in the body. Adipose tissue-derived mesenchymal stem cells (AD-MSCs) as providers of pro-apoptotic molecules such as tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), can be considered as an effective anti-cancer therapy candidate. Therefore, in this study we assessed the role of tumor necrosis factor-producing mesenchymal stem cells oin apoptosis of B-CLL cells resistant to fludarabine-based chemotherapy. Materials and Methods: In this study, after isolation and culture of AD-MSCs, a lentiviral LeGO-iG2-TRAIL-GFP vector containing a gene producing the ligand pro-apoptotic with plasmid PsPAX2 and PMDG2 virus were transfected into cell-lines to generate T293HEK. Then, T293HEK cell supernatant containing the virus produced after 48 and 72 hours was collected, and these viruses were transduced to reprogram AD-MSCs. Apoptosis rates were separately studied in four groups: group 1, AD-MSCs-TRAIL; group 2, AD-MSCs-GFP; group 3, AD-MSCs; and group 4, CLL. Results: Observed apoptosis rates were: group 1, $42{\pm}1.04%$; group 2, $21{\pm}0.57%$; group 3, $19{\pm}2.6%$; and group 4, % $0.01{\pm}0.01$. The highest rate of apoptosis thus occurred ingroup 1 (transduced TRAIL encoding vector). In this group, the average medium-soluble TRAIL was 72.7pg/m and flow cytometry analysis showed a pro-apoptosis rate of $63{\pm}1.6%$, which was again higher than in other groups. Conclusions: In this study we have shown that tumor necrosis factor (TNF) secreted by AD-MSCs may play an effective role in inducing B-CLL cell apoptosis.

조혈모세포이식 후 생착 실패나 재발한 소아환자에서 2차 이식의 의의 (Second allogeneic hematopoietic stem cell transplantation in children to overcome graft failure or relapse after initial transplant)

  • 김동연;김도균;김수영;김석주;한동균;백희조;국훈;황태주
    • Clinical and Experimental Pediatrics
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    • 제49권12호
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    • pp.1329-1339
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    • 2006
  • 목 적 : 조혈모세포이식은 혈액암뿐만 아니라, 유전 질환, 면역질환에서 완치의 방법으로 널리 사용되고 있다. 그러나 생착 실패나 재발로 인해 조혈모세포이식이 실패하는 경우가 종종 있고, 이때는 장기 생존이 거의 불가능한 것으로 알려져 있으며, 치료방법도 정립되지 않았다. 이에 본 저자들은 1차 이식이 실패한 경우 치료법으로써 2차 이식의 의의에 대해 알아보고자 하였다. 방 법 : 1991년 5월부터 2004년 12월까지 전남대학교병원 소아과에서 조혈모세포이식을 시행한 115례 중에서 생착 실패나 재발로 2차 이식을 시행한 비혈액암 8례(재생불량성빈혈 7례, 부신백질이영양증 1례)와 혈액암 7례(급성골수성백혈병 3례, 급성림프구성백혈병 2례, 만성골수성백혈병 1례, 골수이형성증후군 1례), 총 15례의 의무기록지를 바탕으로 치료 방법, 합병증, 치료성과 등에 대해 분석 하였다. 결 과 : 비혈액암의 경우 2례는 일차성 생착 실패, 5례는 후기 이식편 거부, 1례는 Fanconi 빈혈로 1차 이식 후 급성골수성백혈병으로 전환되어 2차 이식을 시행하였다. 1차 이식 후 이식편기능 부전까지 기간은 중앙값 130.5일(범위, 59-279일)이었고, 1차와 2차 이식 사이의 간격은 중앙값 348일(범위, 86-1,875일)이었다. 전처치는 7례에서 cyclophosphamide를 기본으로 하였고, fludarabine을 3례에서, 방사선 조사를 2례에서 사용하였다. 이식원은 6례에서 조직형 일치 형제간 말초조혈모세포를, 1례에서 조직형 일치 형제간 골수를, 1례에서 제대혈을 사용하였고, 제대혈을 사용한 1례를 제외한 7례는 2차 이식의 공여자가 1차 이식 시와 동일하였다. 급성 이식대숙주병은 1례에서 Grade IV로 발생하였다. 총 8례 중 2례가 사망하였고, 1례는 생착 실패하였으나 생존하여, 5년 Kaplan-Meier(K-M)전체생존율은 75.0%, 무병생존율은 62.5%이었다. 혈액암의 경우 모두 재발로 인해 2차 이식을 시행하였다. 1차 이식 후 재발까지 기간은 중앙값 174일(범위, 90-1,474일)이었고, 1차 이식과 2차 이식 사이의 간격은 중앙값 319일(범위, 178-1,715일)이었다. 전처치는 5례에서 fludarabine, busulfan, antithymocyte globulin 병합요법을, 1례는 busulfan, ara-C, idarubicine 병합요법을, 나머지 1례는 melphalan, busulfan 병합요법을 사용하였다. 이식원은 5례는 1차 이식과 동일한 공여자의 말초조혈모세포였고, 나머지 2례는 제대혈을 사용하였다. grade II 이상의 급성 이식대숙주병은 2례에서 발생하였다. 사망한 5례 중 4례는 재발로, 나머지 1례는 이식관련 합병증으로 사망하였다. 2년 K-M 전체생존율과 무병생존율은 각각 28.6%이었다. 결 론 : 조혈모세포이식을 시행하고 이식편 거부나 재발이 된 경우 2차 이식은 일부 환자에서 장기 생존을 가능하게 하는 방법이 될 수 있다. 비혈액암 질환, 특히 재생불량성빈혈에서 생착 실패를 보이는 경우 2차 이식을 시행하는 것을 추천할 수 있지만, 적절한 전처치와 이식원에 관한 연구가 더 필요하겠고, 혈액암 질환에서 재발한 경우에는 소수에서만 장기 생존이 가능하므로 더욱 효과적인 항백혈병 치료가 필요할 것으로 사료되었다.