• 제목/요약/키워드: zebrafish model

검색결과 82건 처리시간 0.025초

Symphoricarpos albus의 항산화능과 Zebrafish 배아 독성 및 재생 효능 평가 (Evaluation of antioxidant activity, zebrafish embryo toxicity, and regenerative efficacy of Symphoricarpos albus)

  • 이찬우;허혜연;김면수;장영표;김보애
    • 한국응용과학기술학회지
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    • 제41권2호
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    • pp.292-304
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    • 2024
  • 본 연구는 Symphoricarpos albus(S. albus) 추출물과 발효 추출물을 대상으로 zebrafish 배아를 이용하여 천연 화장품 소재로서의 유효성 평가 및 꼬리지느러미 재생력을 비교 평가하였다. 이를 위한 S. albus 추출물의 항산화 활성은 10-200 ㎍/mL 농도에서 DPPH radical scavenging, FRAP activity, ABTS+ radical scavenging을 진행하였으며, 모두 농도 의존적인 radical 소거 활성을 보이고, S. albus 잎 추출물에서 가장 높을 항산화 활성을 나타냈다. Zebrafish는 현재 각광받고 있는 실험 대체 동물로서 수많은 화장품 연구에 활용되고 있으며, 본 연구는 zebrafish 배아를 채취하여 응고율, 부화율, 심장 독성을 평가하였다. 그 결과 발효 추출물의 경우 100 ㎍/mL 이상의 농도에서는 독성을 나타내는 것을 확인하였다. 재생 효능을 평가하기 위해 zebrafish 꼬리지느러미를 절단하였고, 3일 동안 상처 회복력을 관찰하였다. 그 결과 72시간 부터 S. albus 잎 추출물 200 ㎍/mL에서 대조군 대비 17%의 재생 효과를 나타내었다. 이러한 결과는 S. albus가 피부 개선용 항산화 및 재생을 위한 천연소재로서 활용 가능한 것으로 사료된다.

Generation of ints14 Knockout Zebrafish using CRISPR/Cas9 for the Study of Development and Disease Mechanisms

  • Ji Hye Jung;Sanghoon Jeon;Heabin Kim;Seung-Hyun Jung
    • 한국발생생물학회지:발생과생식
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    • 제27권4호
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    • pp.205-211
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    • 2023
  • INTS14/VWA9, a component of the integrator complex subunits, plays a pivotal role in regulating the fate of numerous nascent RNAs transcribed by RNA polymerase II, particularly in the biogenesis of small nuclear RNAs and enhancer RNAs. Despite its significance, a comprehensive mutation model for developmental research has been lacking. To address this gap, we aimed to investigate the expression patterns of INTS14 during zebrafish embryonic development. We generated ints14 mutant strains using the CRISPR/Cas9 system. We validated the gRNA activity by co-injecting Cas9 protein and a single guide RNA into fertilized zebrafish eggs, subsequently confirming the presence of a 6- or 9-bp deletion in the ints14 gene. In addition, we examined the two mutant alleles through PCR analysis, T7E1 assay, TA-cloning, and sequencing. For the first time, we used the CRISPR/Cas9 system to create a model in which some sequences of the ints14 gene were removed. This breakthrough opens new avenues for in-depth exploration of the role of ints14 in animal diseases. The mutant strains generated in this study can provide a valuable resource for further investigations into the specific consequences of ints14 gene deletion during zebrafish development. This research establishes a foundation for future studies exploring the molecular mechanisms underlying the functions of ints14, its interactions with other genes or proteins, and its broader implications for biological processes.

Neurobehavioural Changes and Brain Oxidative Stress Induced by Acute Exposure to GSM900 Mobile Phone Radiations in Zebrafish (Danio rerio)

  • Nirwane, Abhijit;Sridhar, Vinay;Majumdar, Anuradha
    • Toxicological Research
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    • 제32권2호
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    • pp.123-132
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    • 2016
  • The impact of mobile phone (MP) radiation on the brain is of specific interest to the scientific community and warrants investigations, as MP is held close to the head. Studies on humans and rodents revealed hazards MP radiation associated such as brain tumors, impairment in cognition, hearing etc. Melatonin (MT) is an important modulator of CNS functioning and is a neural antioxidant hormone. Zebrafish has emerged as a popular model organism for CNS studies. Herein, we evaluated the impact of GSM900MP (GSM900MP) radiation exposure daily for 1 hr for 14 days with the SAR of 1.34W/Kg on neurobehavioral and oxidative stress parameters in zebrafish. Our study revealed that, GSM900MP radiation exposure, significantly decreased time spent near social stimulus zone and increased total distance travelled, in social interaction test. In the novel tank dive test, the GSM900MP radiation exposure elicited anxiety as revealed by significantly increased time spent in bottom half; freezing bouts and duration and decreased distance travelled, average velocity, and number of entries to upper half of the tank. Exposed zebrafish spent less time in the novel arm of the Y-Maze, corroborating significant impairment in learning as compared to the control group. Exposure decreased superoxide dismutase (SOD), catalase (CAT) activities whereas, increased levels of reduced glutathione (GSH) and lipid peroxidation (LPO) was encountered showing compromised antioxidant defense. Treatment with MT significantly reversed the above neurobehavioral and oxidative derangements induced by GSM900MP radiation exposure. This study traced GSM900MP radiation exposure induced neurobehavioral aberrations and alterations in brain oxidative status. Furthermore, MT proved to be a promising therapeutic candidate in ameliorating such outcomes in zebrafish.

Zebrafish에서 human cytochrome b5의 발현 (Expression of Human Cytochrome b5 in Zebrafish)

  • 한세미;유민
    • 생명과학회지
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    • 제27권6호
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    • pp.617-622
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    • 2017
  • 본 연구에서는 zebrafish에 사람의 cyt $b_5$ 유전자를 microinjection하여 발현시키고, 그 결과를 형광으로 확인하였다. HeLa cell에서 RT-PCR을 진행한 결과 414 bp의 cyt $b_5$ band가 증폭되었다. 염기서열 분석으로 재확인된 cyt $b_5$ insert를 pEGFP-N3의 형광 vector에 클로닝하였고, 이렇게 준비된 pEGFP-N3-cyt $b_5$ plasmid DNA를 1세 포기의 수정란에 microinjection하였다. cyt $b_5$를 microinjection한 치어를 형광현미경으로 관찰한 결과 대조군 치어보다 훨씬 선명한 형광을 띠는 것이 확인되었다. 최종적으로 치어에서 RNA를 분리하여 RT-PCR하였고 전기영동과 DNA sequencing으로 fusion 단백질의 발현을 재확인하였다. Cyt $b_5$의 발현으로 인해 zebrafish의 생존율이 다소 떨어지는 것으로 확인되었기에 독성 문제를 해결하기 위한 연구가 계속 필요할 것으로 사료된다. 이 연구는 향후 cyt $b_5$가 결핍되었을 경우 발생할 수 있는 여러 질병들을 유전자 차원에서 치료하고, 유용 유전자 클로닝을 위한 기술 개발에 발판이 될 수 있을 것으로 기대된다.

Whitening Effect of Octaphlorethol A Isolated from Ishige foliacea in an In Vivo Zebrafish Model

  • Kim, Kil-Nam;Yang, Hye-Mi;Kang, Sung-Myung;Ahn, Ginnae;Roh, Seong Woon;Lee, WonWoo;Kim, Daekyung;Jeon, You-Jin
    • Journal of Microbiology and Biotechnology
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    • 제25권4호
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    • pp.448-451
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    • 2015
  • In a previous study, we isolated octaphlorethol A (OPA) from Ishige foliacea and evaluated its anti-melanogenesis activity in a murine melanoma cell line. However, the whitening effect and toxicity of OPA have not yet been examined in vivo. Therefore, in this study, we investigated the inhibitory effect of OPA on melanin synthesis and tyrosinase activity in an in vivo zebrafish model. More than 90% of subject embryos survived upon exposure to OPA concentrations below $25{\mu}M$, which was not significantly different from the finding in the control group. OPA markedly inhibited melanin synthesis and tyrosinase activity in a concentration-dependent manner.

Therapeutic Potential of CKD-504, a Novel Selective Histone Deacetylase 6 Inhibitor, in a Zebrafish Model of Neuromuscular Junction Disorders

  • Jeong, Hui Su;Kim, Hye Jin;Kim, Deok-Ho;Chung, Ki Wha;Choi, Byung-Ok;Lee, Ji Eun
    • Molecules and Cells
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    • 제45권4호
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    • pp.231-242
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    • 2022
  • The neuromuscular junction (NMJ), which is a synapse for signal transmission from motor neurons to muscle cells, has emerged as an important region because of its association with several peripheral neuropathies. In particular, mutations in GARS that affect the formation of NMJ result in Charcot-Marie-Tooth disease and distal hereditary motor neuropathy. These disorders are mainly considered to be caused by neuronal axon abnormalities; however, no treatment is currently available. Therefore, in order to determine whether the NMJ could be targeted to treat neurodegenerative disorders, we investigated the NMJ recovery effect of HDAC6 inhibitors, which have been used in the treatment of several peripheral neuropathies. In the present study, we demonstrated that HDAC6 inhibition was sufficient to enhance movement by restoring NMJ impairments observed in a zebrafish disease model. We found that CKD-504, a novel HDAC6 inhibitor, was effective in repairing NMJ defects, suggesting that treatment of neurodegenerative diseases via NMJ targeting is possible.

제브라피쉬를 이용한 새로운 유전자의 발굴 및 기능분석 (Zebrafish as a Tool for Function Genomics)

  • 김현택;김철희
    • 한국발생생물학회지:발생과생식
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    • 제7권2호
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    • pp.69-80
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    • 2003
  • 대량의 발생 유전학적 연구가 가능한 척추동물로서 최근 제브라피쉬가 새로운 동물모델로 급부상하고 있다 다양한 형태의 돌연변이들로부터 새로운 유전자들이 발굴되어지고 있으며, 인간 유전체의 기능 분석 수단으로 활용되어지고 있다. 신경계의 형성과 분화에 이상이 있는 hendless와 mind bomb이라는 두 가지 돌연변이주에서 positional cloning에 의한 원인 유전자의 발굴과 기능 분석의 예로써 현재 제브라피쉬의 연구 현황을 살펴보고자 한다. headless의 원인 유전자로 Tcf-3가 밝혀졌으며, 초기 발생단계에서 Wnt 신호전달이 두뇌의 형태형성과 영역 결정에서 핵심적 역할을 하고 있다는 사실이 밝혀졌다. mind bomb에서의 비정상적인 신경세포의 운명 결정은 lateral inhibition과 Notch 신호전달의 결함에 의한 것이고, 그 원인 유전자는 Notch ligand인 Delta에 결합하는 새로운 ubiquitin E3 ligase로 밝혀졌다. 이러한 돌연변이를 통한 연구는 현재 인간 질환모델의 개발이라는 방향으로 확대되고 있다.

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Protective effects of extracts from six local strains of Pyropia yezoensis against oxidative damage in vitro and in zebrafish model

  • Dai, Yu-Lin;Kim, Gwang Hoon;Kang, Min-Cheol;Jeon, You-Jin
    • ALGAE
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    • 제35권2호
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    • pp.189-200
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    • 2020
  • Pyropia yezoensis has been used as functional food in East Asia, especially in Korea and Japan, for more than five hundred years. This study aims to evaluate the antioxidant effect of polyphenols and proteins-rich extracts from P. yezoensis (PPPs) against 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH)-induced oxidative cell damage. Among six Korean local strains obtained from Jinhae (JiH), Haenam (HN), Jangheung (JaH), Jindo (JD), Wando (WD), and Sinan (SA) areas, the extracts of P. yezoensis from SA and JD are relatively higher in polyphenols and proteins contents. SA showed the lowest IC50 scavenging activities against 1,1-diphenyl-2-picryl-hydrazyl and alkyl radicals and displayed protective effects against reactive oxygen species (ROS) in AAPH-induced Vero cells. Especially, the PPPs extracts from SA and JD showed protective activities against AAPH-induced apoptosis, as observed by nuclear staining with Hoechst 33342. Furthermore, in vivo studies of the SA extract in zebrafish showed significantly reduced ROS generation, lipid peroxidation, and cell damage. This is the first study, to our knowledge, to evaluate the antioxidant bioactivity of PPP in the Korean Peninsula using a zebrafish model. Due to SA and JD both located in the west coast of Korea, we deduced that the chemical content of the different PPP extracts was mildly influenced by their geographic location, and this alga has potential of protective activity against AAPH-induced ROS both in vitro and in vivo.

뇌전증 융합연구를 위한 MCS 녹아웃동물의 활용방안 (Evaluation of MCS Knockout Animal for Epilepsy Model)

  • 황규석;김옥희;김철희
    • 한국융합학회논문지
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    • 제7권2호
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    • pp.53-59
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    • 2016
  • 뇌전증은 뇌신경세포의 과흥분으로 인한 발작증상을 동반하는 질환이며, 최근 대단위 환자유전체 정보기술의 발달로 인해 뇌전증 발병의 원인으로서 유전자적 요인이 밝혀지고 있다. 본 연구에서는 지적장애 및 뇌전증 증상을 가지는 Miles-Carpenter syndrome (MCS)의 원인유전자에 대한 녹아웃동물을 활용하여 뇌전증 연구모델로 개발하고자 하였다. MCS 녹아웃 제브라피쉬는 억제성 GABA신경세포의 결손으로 인하여 비정상적으로 과다하게 움직이는 표현형을 나타내며, 이는 뇌전증 환자에서 보여지는 발작증상과 매우 유사한 것으로 판명되고 있다. 뇌전증 연구모델로 개발하기 위해, 기존에 알려진 뇌전증 치료제인 레티가빈을 MCS 녹아웃 제브라피쉬에 처리하여 약효를 평가하였으며 증상이 완화되는 것을 확인하였다. 이상의 결과들을 바탕으로 MCS 녹아웃동물이 향후 뇌전증 기전연구를 위한 동물모델로서의 융합적인 활용이 기대된다.