• 한국수산과학회지
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• 제48권4호
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• pp.403-410
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• 2015

Viral nervous necrosis (VNN) is a serious disease of sevenband grouper Epinephelus septemfasciatus in Korean aquaculture farms. However, we suggest the following preventative methods for hatcheries: 1) disinfecting rearing water, 2) selecting spawners via ELISA and PCR, 3) selecting eggs via PCR, 4) disinfecting fertilized eggs, and 5) proper facilities management. When these methods are implemented, nervous necrosis virus (NNV)-free fish are produced because vertical and horizontal transmission is prevented. However, horizontal transmission of NNV through rearing seawater sourced from the environment during grow-out stages in sea cages can still occur. Live NNV vaccines with a low rearing temperature or Poly(I:C) immunization are very effective at preventing horizontal transmission of NNV in rearing farms. Furthermore, even after VNN is contracted, fish mortality can be reduced by administering Poly(I:C).

• 한국미생물·생명공학회지
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• 제25권2호
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• pp.137-143
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• 1997

Porcine transforming growth factor-$\beta$1 (TGF-$\beta$1) was expressed in Escherichia coli using cDNA of TGF-$\beta$1 and glutathione S-transferase (GST) fusion vector pGEX-1$\lambda$T. An ApoI-Tth111I fragment of cDNA which correspond to the amino acid residues from 123 to 390 of the precursor TGF-$\beta$1 was inserted into EcoRI-Tth111I digested pGEM#-l$\lambda$T and the recombined plasmid was named pGET-12. Gene products from the cloned regions of the recombinant plasmids pGET-12 was not detected in soluble fraction of cell free extract but detected in insoluble fraction. The solubilization of insoluble gene product was achieved by the treatment of N-laurylsarcosine. Molecular weight of partially purified proteins determined by electrophoresis was same as expected from cloned fragment. The ELISA test results of the purified proteins showed that immunologically detectable epitope was preserved in recombinant protein.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.135.3-136
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• 2003

Liriope platyphylla (LP) Wang et Tang has been used for tonic, anti-tussive and expectorant in Korea. In the current study, we found that buthanol fraction of Liriope platyphylla-conditioned media of C6 and primary astrocyte induced the neurite outgrowth of PC 12 cells, which effect was reversed by addition of NGF-antibody. We demonstrated that buthanol fraction of Liriope platyphylla increased the expression and secretion of NGF through RT-PCR and ELISA. (omitted)

• 한국식품영양과학회지
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• 제29권3호
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• pp.437-441
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• 2000

감마선 조사기술을 이용하여 새우 알러지를 감소시키기 위해 본 연구를 실시하였다. 감마선 조사구(A), 감마선 조사후 가열처리구(B), 가열처리 후 감마선 조사구(C)로 실험구를 설정하고 1,3,5,7,10 kGy의 감마선을 조사하여 실험에 사용하였다. A 처리구로부터 새우의 근혈장 단백질 용액과 근섬유 단백질 용액을 준비하였고, B와 C처리구에서도 각각의 단백질 용액을 준비하였다. 각 단백질 용엑에 대한 환자 IgE와 mAb 4.9.5의 결합력을 ELISA로 조사하였다. 두 항체 모두 감마선 조사구의 단백질을 용액과의 결합력이 감마선 조사선량이 증가할수록 낮게 나타났고, 감마선 조사후 가열처리가 항체의 결합력을 감소시키는데 더 효과적이었다. SDS-PAGE 결과 감마선 조사된 새우 단백질의 전기영동적 분리 pattern에는 변화가 없었다. 이 결과는 적절한 선량의 감마선 조사가 새우 알러지를 감소시킬 수 있다는 것을 시사한다.

• Journal of Microbiology and Biotechnology
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• 제23권6호
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• pp.878-884
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• 2013

Salmonella is a major foodborne pathogen that causes a variety of human diseases. Development of ligands directly and specifically binding to the Salmonella will be crucial for the rapid detection of, and thus for efficient protection from, the virulent bacteria. In this study, we identified a RNA aptamer-based ligand that can specifically recognize Salmonella Typhimurium through SELEX technology. To this end, we isolated and characterized an RNase-resistant RNA aptamer that bound to the OmpC protein of Salmonella Typhimurium with high specificity and affinity ($K_d$ ~ 20 nM). Of note, the selected aptamer was found to specifically bind to Salmonella Typhimurium, but neither to Gram-positive bacteria (Staphylococcus aureus) nor to other Gram-negative bacteria (Escherichia coli O157:H7). This was evinced by aptamer-immobilized ELISA and aptamer-linked precipitation experiments. This Salmonella species-specific aptamer could be useful as a diagnostic ligand against pathogen-caused foodborne sickness.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2001년도 추계학술대회 및 정기총회
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• pp.102-102
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• 2001

Taurine (2-ethaneaminosulfonic acid) is one of the major intracellular ${\beta}$ -amino acids in mammals and is required for a number of biological processes including membrane stabilization, osmoregulation, antioxidation, detoxification, modulation of calcium flux and neurornodulation. The taurine transporter (TAUT) which contains 12 hydrophobic membrane-spanning domains has been cloned from dog kidney, rat brain, mouse brain, human thyroid, placenta and retina. In this study, The TAUT cDNA from the human intestinal epithelial cell, HT-29 was cloned and sequenced. Reverse-transcription polymerase chain reaction (RT-PCR) was performed to amplify partial cDNA encoding human intestinal TAUT. The coding region of the PCR product was 732 bp long. The primers were designed to encode highly conserved amino acid sequences near the transmembrane domains III (IPYFIFLF) and Ⅵ (KYKYNSYR) both in human and mouse. The TAUT cDNA amplified was ligated into the pGEX 4T-1 expression vector. The resulting sequence of human intestinal TAUT cDNA (Accession number of NCBI Genebank is AF346763) was identical to the sequences of the TAUTs previously determined in the human placenta and retina except 3 base pairs from that of the reported human thyroid. TAUT specific antibodies were generated to use them as biological tools in the studies of the biological role of TAUT. Peptides of 149-162 amino acid residue (14 amino acids) of the TAUT were synthesized. The synthetic peptide used in this study was LFQSFQKELPWAHC. This region was chosen not only to avoid putative glycosylation sites but also to exclude regions of known homology with GABA transporters in the extracellular hydrophilic domains. The synthetic peptide, TAUT-1 was conjugated with carrier protein, kehole lympet hemocyanin (KLH) to use as an antigen. When used for immunization on a rabbit to produce polyclonal antiserum, the conjugates elicited high -titered specific anti-TAUT-1 antibodies, which reacted well with the ovalbumin (OVA) conjugated peptides in ELISA. The KLH-conjugated peptide was also used as immunizing antigen in BALB/c mice to produce TAUT specific monoclonal antibodies. From the culture supernatant of the hybridoma, the specificity of anti-TAUT-1 monoclonal antibodies was confirmed by ELISA. Further applications of more tools in TAUT expression analysis will be performed such as western blotting and flow cytometry.

• Pediatric Infection and Vaccine
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• 제20권3호
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• pp.123-130
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• 2013

목적: 아급성경화범뇌염은 퇴행성 신경질환으로 홍역바이러스의 지속적 중추신경계 감염으로 나타난다. 저자들은 마우스 모델을 통해 아급성경화범뇌염 발병에서 만성 바이러스 감염에 관여하는 PD-1 유전자의 역할을 알아보고자 하였다. 방법: 3주령의 동형 PD-1 유전자 제거 마우스, 이형 PD-1 유전자 제거 마우스, 야생 BALB/c 마우스를 대상으로 측뇌실내 홍역바이러스를 주입하여 동물 모델로 하였다. 바이러스 주입 3개월 후, 마우스의 뇌 조직학적 소견을 관찰하고 혈청을 분리하여 IL-21의 혈청 농도를 ELISA kit을 통해 측정하였다. 결과: 야생 BALB/c 마우스에서 가장 많은 국소적 뇌백질의 괴사 및 성상세포의 증가가 관찰되었다. 이형 마우스에서 뇌실질의 병변은 적었으며 동형 마우스는 거의 보이지 않았다. 세 그룹에서 모두 혈청 IL-21의 증가는 보이지 않았다. 결론: 이 결과는 PD-1 유전자가 만성 바이러스 감염에 중요한 역할을 함을 시사한다.

• 식물병연구
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• 제12권2호
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• pp.91-98
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• 2006

Acinetobacter sp. KTB3의 배양여과액으로 제조한 분말 제제 KNF2022의 바이러스 감염억제 효과를 PMMoV 와 N. glutinosa 또는 N. tabacum cv. Xanthi nc를 이용하여 검정한 결과, 증류수 1/100 배양액의 실질 농도 10,000 ppm) 희석농도에서 $94.3{\sim}95.6%$의 높은 감염억제 효과를 나타냈다. 이 1/100 희석농도를 이용하여 PepMoV-C amaranticolor에서 검정한 억제효과는 97.1%, CMV-C amaranticolor 에서는 92.5%의 감염억제를 나타냈다. KNF2022 희석액을 N. glutinosa의 반엽에 도말하고 일정 시간 경과 후 PMMoV를 접종하여 조사한 억제효과의 지속성은 처리 2 일 후까지 약 80% 선에서 억제효과를 나타냈으나, 처리 4 일 후부터는 50% 수준으로 저하되었다. 고추에 KNF2022를 처리한 후 3 종의 바이러스를 접종하고 발현되는 병징을 조사한 결과, 각 바이러스를 단독으로 접종하였을 경우는 바이러스의 종류에 관계없이 접종 후 10 일까지 병징발현이 지연되는 효과를 보였다. 특히 PepMoV를 접종한 경우는 접종 후 30 일까지 병징발현이 억제되어 제제의 처리효과가 뚜렷하게 나타났다. 한편 이들 3 종 바이러스의 복합감염에 대한 KNF2022의 효과는 모든 바이러스 조합에서 단독감염 보다 강하게 발현되어 병징억제의 효과는 뚜렷하게 나타나지 않았다. 제제를 처리한 고추에서 증식된 바이러스의 농도를 PCR 및 ELISA로 검출한 결과, PepMoV를 단독으로 접종한 경우, 접종 후 30 일까지 cDNA가 검출되지 않았다. RT-PCR 검정에서 억제효과가 인정된 PepMoV와 그 복합감염 의 조합에 대해서 ELISA 검정을 실시한 결과, PCR 검정에서 얻어진 결과와 유사한 패턴을 보여 PepMoV에 대한 감염억제효과가 뚜렷하게 인정되었다. KNF2022를 처리하여 전자현미경으로 관찰한 PMMoV와 PepMoV는 처리 5 분 후에 각각 200-250 nm 및 400-600 nm의 길이로 절단된 입자가 많이 관찰되었고, 처리 30 분 후에는 대부분 100-150nm와 300-500 nm의 절편입자로 관찰되었다. 이와 같이 절단된 입자가 증가할수록 N. tabacum cv. Xanthi nc 와 C. amaranticolor에서 나타난 병반수는 급격하게 감소되었다. 한편 KNF2022를 처리한 후 전자현미경을 관찰한 CMV의 바이러스 입자는 처리시간에 비례하여 파괴된 입자의 수가 증가하였으며, 파괴된 바이러스입자가 증가할수록 C. amaranticolor에서의 병반수도 감소되었다.

• 한국축산식품학회지
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• 제21권3호
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• pp.265-271
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• 2001

We investigated changes of immunoglobulin G (IgG) concentrations by heating and drying condition. Also it is performed to group for commercial product by promoting of IgG preservation and reducing of protein denaturation. The result was that content of IgG in colostrum was higher than normal milk. Especially, IgG content of colostrum within 12 hrs after parturition was over 44.67mg/ml and it is 60 times of normal milk. IgG contents was reduced rapidly according as passage of the time. IgG content of the sample heating at 30min at 65$^{\circ}C$ was still a little higher that heating for 10sec at 72$^{\circ}C$. IgG denaturation of heat treatment at 100$^{\circ}C$ for 10sec was lower than at 85$^{\circ}C$ for 30min. We investigated the changes of IgG concentrations of kinds of market milk different with heating processing. This result showed that IgG denaturation ratio by ultra high temperature pasteurization (UHT) was higher than long time low temperature pasteurization (LTLT). On the other hands, IgG content by spray drying was 14.5mg/g and freezing drying was 10.8mg/g. It showed that denaturation of protein content by freezing drying was more than spray drying.

• Asian-Australasian Journal of Animal Sciences
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• 제21권12호
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• pp.1760-1765
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• 2008

A total of 60 one-day-old Yellow-feather broiler chickens were allotted into treatment and control groups. The treatment group was fed with the diet supplemented with 3% conjugated linoleic acid (CLA) for 48 d, while control group was fed with the diet supplemented with 3% rapeseed oil. Chickens were slaughtered in each group at the age of 49 d, and the blood and the abdominal adipose tissue were sampled. Serum cLeptin and serum cAdiponectin were measured by ELISA. The total RNA was extracted from adipose tissue to measure the abundance of the chicken growth hormone receptor (cGHR), insulin-like growth factor 1 (cIGF-1), insulin-like growth factor I receptor (cIGF-IR), peroxisome proliferator-activated receptor gamma ($cPPAR{\gamma}$), cAdiponectin and cAdipoIR mRNA by RT-PCR using ${\beta}$-actin as an internal standard. Results showed that the CLA decreased the abdominal fat index by 20.93% (p<0.05). The level of serum cLeptin but not serum cAdiponectin was significantly increased by CLA treatment (p<0.05). CLA down-regulated the relative abundance of cGH-R mRNA and $cPPAR{\gamma}$ mRNA in abdominal adipose tissue by 24.74% (p<0.05) and 66.52% (p<0.01) respectively. However, no differences were found between CLA treatment group and control group (p>0.05) in the relative abundance of cIGF-1, cIGF-IR, cAdiponectin, and cAdipoIR mRNA in abdominal adipose tissue. The data suggested that CLA inhibited abdominal fat deposition in broiler chicken may be determined by decreasing the GHR available for GH, and by inhibiting the differentiation of preadipocytes via down-regulation of $PPAR{\gamma}$, but independent of IGF and (or) GH-IGF pathway or adiponectin action.