• 제목/요약/키워드: 5-aminolevulinic acid

검색결과 98건 처리시간 0.024초

Synthesis of 5-Aminolevulinic Acid (ALA) and Its t-Butyl Ester for the Fluorescence Detection of Early Cancer

  • Kang Min-Seok;Kim Dong-Myung;Kim Jeong Sook;Jeong Jin-Hyun
    • Archives of Pharmacal Research
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    • 제28권10호
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    • pp.1111-1113
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    • 2005
  • 5-Aminolevulinic acid and its derivatives, which are known to affect the early diagnosis and treatment of cancer, have been synthesized. Simple methods for the synthesis of 5-aminole-vulinic acid (ALA), a precursor of porphyrins, have been developed in our laboratory for use in studies on the biosynthesis of porphyrins.

Process Strategies to Enhance the Production of 5-Aminolevulinic Acid with Recombinant E. coli

  • LEE , DAE-HEE;JUN, WOO-JIN;YOON, JEONG-WEON;CHO, HONG-YON;HONG, BUM-SHIK
    • Journal of Microbiology and Biotechnology
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    • 제14권6호
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    • pp.1310-1317
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    • 2004
  • The extracellular production of 5-aminolevulinic acid (ALA) by recombinant E. coli BL21 harboring a fusion gene hemA was investigated in a fermenter. For this purpose, the effects of various physiological factors, such as isopropylthio­$\beta$-D-galactopyranoside (IPTG) concentrations and the time of induction, on enzyme activity were studied. Optimum concentrations of glycine and succinic acid were found to be 30 mM and 90 mM, respectively. When the cells were permitted to grow for 2 h prior to the addition of 0.1 mM IPTG, the activity of ALA synthase was higher than when IPTG was initially added. A 36-fold increase in the activity was observed with only 0.1 mM IPTG added. The pH of the medium also influenced the ALA synthase activity with the maximal activity occurring at pH 6.5. In recombinant E. coli extracts, the repeated addition of glycine and D-glucose increased the production of ALA and the inhibited intracellular ALA dehydratase activity, with up to 32 mM ALA being produced in the cultivation.

Bacillus cereus 1-1 균주의 5-Aminolevulinic Acid (ALA) 생산 (Production of 5-Aminolevulinic Acid (ALA) by Bacillus cereus 1-1)

  • 안경준
    • 미생물학회지
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    • 제43권4호
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    • pp.304-310
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    • 2007
  • Bacillus cereus 1-1 균주는 광이 없는 호기적 환경에서 levulinic acid와 같은 저해제 처리 없이도 5-aminolevulinic acid (ALA)를2 mM까지 생산하였다. B. cereus 1-1 균주는 TCY 배지에서 전 배양과 본 배양을 18시간 동안 지속하고, 배지의 pH가 6.8에 도달하는 대수기 후기에 acetic acid를 비롯한 유기산들을 16 mM 첨가하였을 때 많은 ALA를 생산하였으며, 본 배양 시작시 0.3% glucose를 첨가하는 것이 효과적이었다. Acetic acid 대신 glutamic acid를 첨가하였을 때 ALA 생산이 8시간 이상 지속되었고, $40\;{\mu}M$의 gabaculine을 첨가하면 생산이 현저히 저해되는 것으로 보아 B. cereus 1-1 균의 ALA 생산은 C-5 경로에 의함을 알 수 있었다.

수술현미경용 다중형광 관측 시스템 연구 (Development of Indocyanine Green and 5-Aminolevulinic Acid Detection System for Surgical Microscope)

  • 김홍래;이현민;윤웅배;김영재;김석기;유헌;주재영;김광기;이승훈
    • 대한의용생체공학회:의공학회지
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    • 제36권1호
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    • pp.16-21
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    • 2015
  • Indocyanine green(ICG) and 5-aminolevulinic acid(5-ALA) have been widely used to mark blood vessels or tumors. However, fluorescent dye detection systems were designed to use one type of dyes only. In this study, we proposed a detection system capable of detecting Indocyanine green and 5-aminolevulinic acid. Multiple filters and light sources are integrated into a single system. In this study, we performed analysis of fluorescent dyes and configured a detection system. During the analysis, it was found that Indocyanine green and 5-aminolevulinic acid have the maximum intensity at $40{\mu}M$. We designed light source for fluorescent dyes and conducted compatibility test using a commercial surgical microscope. The fluorescent dye detection system was configured based on the experimental results. The developed system successfully detects Indocyanine green and 5-aminolevulinic acid. Therefore, more efficient surgical operations can be achieved using both fluorescent dyes at the same time. We expect that the developed system can increase the survival rate of patients.

Cloning and Expression of the Rhodobacter capsulatus hemA Gene in E. coli for the Production of S-Aminolevulinic Acid

  • KANG , DAE-KYUNG;KIM, SANG-SUK;CHI, WON-JAE;HONG, SOON-KWANG;KIM, HA-KUN;KIM, HYUN-UK
    • Journal of Microbiology and Biotechnology
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    • 제14권6호
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    • pp.1327-1332
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    • 2004
  • The hemA gene encoding 5-aminolevulinic acid synthase (ALAS) was cloned from Rhodobacter capsulatus, and its nucleotide sequence was determined. DNA sequencing data revealed one open reading frame coding for a protein with 401 amino acids that displayed high similarity to the amino acid sequences of other known ALASs. The hemA gene was then cloned and expressed under the control of constitutive promotor in E. coli. The recombinant E. coli strain was able to accumulate 5-aminolevulinic acid to 21 mM in the liquid medium supplemented with 45 mM glycine and 120 mM succinate. In addition, a marked effect of the pH of the culture medium on ALA production was observed, and the optimum pH for culture medium was determined to be 5.8-6.3.

Rhodocyclus gelatinosus KUP-74에 의한 $\delta$-Aminolevulinic acid 생합성의 $C_5$-전구물질의 영향 (Influence of $C_5$-Precursors on $\delta$-Aminolevlinic Acid Biosynthesis in Rhodocyclus gelatinosus KUP-74)

  • 최경민;임왕진;황세영
    • 한국미생물·생명공학회지
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    • 제21권6호
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    • pp.527-533
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    • 1993
  • Aminolevulinic acid(ALA) was shown to be synthesized via active pathways of either C4 or C5 ALA biosynthesis in cells of a photosynthetic bacterium, Rhodocyclus gelatinosus KUP-74, where the C5 pathway was appeared to be preferntially expressed in the cells. It was strongly suggested that L-glutamine might be utilized more effectively than L-glutamate to synthesize ALA via C5 pathway in this bacterium from the fact of relationship between the cellular uptake rates of glutamate and its Gamma-derivaties and corresponded ALA productivities in vitro and in vivo.

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생분해성 생리활성물질 5-aminolevulinic acid의 제초 및 살충활성 (Herbicidal and Insecticidal Potentials of 5-Aminolevulinic acid, a Biodegradable Substance)

  • 천상욱
    • 농약과학회지
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    • 제11권1호
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    • pp.52-58
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    • 2007
  • 5-Aminolevulinic acid (ALA)는 protoporphyrinogen IX oxidase(Protox IX)의 작용기작에 의해 tetrapyrrole 의존형 광활성 제초제 또는 살충제로서 제안되어 왔다. 본 연구는 생분해성 생물농약 물질로서 ALA에 대한 식물과 해충의 생육반응을 검토하기 위해 수행되었다. 수도적 조건에서 ALA는 벼와 피 두 초종에 대해 독성을 보였으며 벼보다는 피의 초장과 지상부 생체중을 더 억제하였다. 밭 조건에서 두과작물 콩과 화본과 잡초 바랭이에 5 mM ALA를 처리한 결과 바랭이가 더 민감한 생육반응을 보였다. ALA 10 mM(10배액)로 파밤나방에 대한 살충효과는 살포법으로 처리한 결과 단제 및 합성 살충제 lufenuron과의 조합처리에서 다소 높게 나타났다. leaf disk법으로 응애에 대한 살비효과를 검정한 결과 10 mM ALA 처리 후 72시간에 가장 높게 나타났다. 이상의 결과로 볼 때 ALA는 비록 그 활성이 기존의 합성농약보다 낮을지라도 농업유해생물에 대해 잠재적인 제초 및 살충활성을 갖고 있는 것으로 나타났다.

Experience with 5-Aminolevulinic Acid in Fluorescence-Guided Resection of a Deep Sylvian Meningioma

  • Chae, Michael P.;Song, Sang Woo;Park, Sung-Hye;Park, Chul-Kee
    • Journal of Korean Neurosurgical Society
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    • 제52권6호
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    • pp.558-560
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    • 2012
  • The 5-aminolevulinic acid (5-ALA)-induced tumor fluorescence is a useful intraoperative marker for the diagnosis and the detection of various malignancies, but its use in meningioma is only reported infrequently. In meningioma, a complete resection of the tumor mass is crucial for the prevention of recurrence and postoperative morbidities. Deep sylvian meningioma is a rare type of meningioma where complete tumor removal is complicated by its deep anatomical location and close involvement with the middle cerebral artery. From our experience, 5-ALA-mediated fluorescence facilitated a safe excision whilst preserving critical neurovascular structures. To our best knowledge, this is first report from use of 5-ALA in a deep sylvian meningioma.

Rhodopseudomonas sp. KCTC1437에서의 Polyhydroxyalkanoates와 5-Aminolevulinic Acid의 생합성 (Biosynthesis of Polyhydroxyalkanoates and 5-Aminolevulinic Acid by Rhodopseudomonas sp. KCTC1437)

  • 이영하;기형석;최강국;문명님;양영기
    • 미생물학회지
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    • 제38권2호
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    • pp.144-151
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    • 2002
  • Rhodopseudomonas sp. KCTC1437균주를 이용하여 Polyhydroxyalkanoate (PHA)와 5-aminolevulinic acid (ALA)를 생산하기 위한 배양조건과 이들 생합성 조건의 상호관련성에 대하여 조사하였다. PHA생합성을 위한 탄소원으로는 acetic acid가 가장 효과적이었으나, succinic acid를 보조 탄소원으로 사용하였을 때의 세포건체량은 2.5g/ι, PHA함량은 건체량의 73%로서 주 탄소원만을 사용할 때에 비하여 크게 증가하였다. 조사된 탄소원으로부터 생합성된 PHA는 모두 polyhydroxybutyrate 단일중합체 이었으나, valeric acid로부터는 3-hydroxybutyrate와 3-hydroxyvalerate로 구성된 공중합체가 생산되었다. ALA의 생합성을 위하여서는 환원제 인 sodium thioglycolate를 첨가하여 혐기적 조건을 만들고, 탄소원인 acetic acid와 propionic acid 이외에 전구물질인 levulinic acid, succinic acid와 glycine을 반복적으로 공급해주었을 때 가장 좋았으며, 약 400 mg/ι의 ALA를 생산할 수 있었다. 그러나 ALA 생합성의 필수물질인 glycine, levulinic acid와 환원제는 세포생장과 PHA의 생합성을 저해하는 것으로 나타났다. 이러한 실험 결과, Rhodopseudomonas sp. KCTC1437균주로부터 PHA와 ALA를 동시에 생산할 수 있으나, 두 가지 유용산물을 효율적으로 생합성하기 위한 각각의 배양조건이 상호 배타적임을 확인하였다.

Rhodobacter sphaeroides에 의한 ${\delta}-aminolevulinic{\;}acid$생산에 있어서 glutamic acid 및 감마 유도체의 영향 (Effect of glutamic acid and its ${\gamma}-derivatives$ on the production of ${\delta}-aminolevulinic{\;}acid$ by Rhodobacter sphaeroides)

  • 최경민;임왕진;황세영
    • Applied Biological Chemistry
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    • 제36권3호
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    • pp.184-190
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    • 1993
  • Rhodobacter sphaeroides 균주가 생산하는 ${\delta}-aminolevulinic\;acid(ALA)$의 생산성에 관하여 in vivo, in vitro 상에서 기질 및 관련 화합물을 이용하여 검토하였다. $C_5\;ALA$ 생합성계에 의한 ALA yield 대비의 $C_4$ 생합성계에 의한 비율은 in vive 상에서 0.78인 반면, in vitro 상에서의 비율은 1.37이었다.$C_4\;C_5$ 각 계의 기질 첨가 배양에 의한 cell-free system의 $C_4,\;C_5$ 계의 발현도는 미첨가 배양에 의한 system과 비교하여 각각 1.35, 1.52로 증가하였으나, 증가한 계에 대한 상대계의 발현도가 억제되어, $C_4$$C_5$ 계가 각각 0.91, 0.83으로 나타났다. ${\gamma}-Glutamyl\;derivatives$의 세포내 uptake rates는 L-glutamic acid를 기준으로 비교해서 D-glutamic acid, 0.55: D-glutamine, 0.5: L-glutamine, 0.4: ${\gamma}-L-glutamyl\;ethylester$, 0.3: GSH 및 Glu-pNA, 0의 순서를 보였다. Uptake rate와 관계없이 in vivo 상에서 L-과 D-glutamine이 L-, D-glutamic acid보다 균체 외 ALA의 생산에 있어서 각각 높은 yield의 효과를 보였다.

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