• Childhood Kidney Diseases
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• 제19권2호
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• pp.79-88
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• 2015

Neutrophil gelatinase-associated lipocalin (NGAL) has emerged as one of the most promising biomarkers of renal epithelial injury. Numerous studies have presented the diagnostic and prognostic utility of urinary and plasma NGAL in patients with acute kidney injury, chronic kidney disease, renal injury after kidney transplantation, and other renal diseases. NGAL is a member of the lipocalin family that is abundantly expressed in neutrophils and monocytes/macrophages and is a mediator of the innate immune response. The biological significance of NGAL to hamper bacterial growth by sequestering iron-binding siderophores has been studied in a knock-out mouse model. Besides neutrophils, NGAL is detectable in most tissues normally encountered by microorganisms, and its expression is upregulated in epithelial cells during inflammation. A growing number of studies have supported the clinical utility of NAGL for detecting invasive bacterial infections. Several investigators including our group have reported that measuring NGAL can be used to help predict and manage urinary tract infections and acute pyelonephritis. This article summarizes the biology and pathophysiology of NGAL and reviews studies on the implications of NGAL in various renal diseases from acute kidney injury to acute pyelonephritis.

• Biotechnology and Bioprocess Engineering:BBE
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• 제8권4호
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• pp.263-267
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• 2003

Magnetic nanoparticles prepared from an alkaline solution of divalent and trivalent iron ions could covalently bind protein via the activation of Nethyl-N-(3-dimethylaminopropyl) carbodiimide (EDC). Trypsin and avidin were taken as the model proteins for the formation of protein-nanoparticle conjugates. The immobilized yield of protein increased with molar ratio of EDC/nanoparticie. Higher concentrations of added protein could yield higher immobilized protein densities on the particles. In contrast to EDC, the yields of protein immobilization via the a ctivation of cyanamide were relatively lower. Nanoparticles bound with avidin could attach a single-stranded DNA through the avidin-biotin interaction and hybridize with a DNA probe. The DNA hybridization was confirmed by fluorescence microscopy observations. Immobilized DNA on nanoparticles by this technique may have widespread applicability to the detection of specific nucleic acid sequence and targeting of DNA to particular cells.

• Biotechnology and Bioprocess Engineering:BBE
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• 제10권6호
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• pp.500-504
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• 2005

Fusion ferritin (heavy chain ferritin, $F_H+$ light chain ferritin, $F_L$), an iron-binding protein, was primarily purified from recombinant Escherichia coli by two-step sonications with urea [1]. Unfolded ferritin was refolded by gel filtration chromatography (GFC) with refolding enhancer, where 50 mM Na-phosphate (pH 7.4) buffer containing additives such as Tween 20, PEG, and L-arginine was used. Ferritin is a multimeric protein that contains approximately 20 monomeric units for full activity. Fusion ferritin was expressed in the form of inclusion bodies (IBs). The IBs were initially solubilized in 4 M urea denaturant. The refolding process was then performed by decreasing the urea concentration on the GFC column to form protein multimers. The combination of the buffer-exchange effect of GFC and the refolding enhancers in refolding buffer resulted in an efficient route for producing properly folded fusion ferritin.

• Journal of Plant Biotechnology
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• 제36권3호
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• pp.224-229
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• 2009

Human lactoferrin is an iron-binding glycoprotein with many biological activities, including the protection against microbial and virus infection and stimulation of the immune system. We introduced a human lactoferrin (hLf) cDNA under the control of 35S promoter into sweet potato by particle bombardment. Transgenic plants were regenerated via somatic embryogenesis. Transgenic plants were produced typical tuberous roots in soil. PCR, Southern and northern analyses confirmed that the hLf cDNA was incorporated into the plant genome and was properly expressed in plants. Western blot analysis showed that the 80 kDa full length hLf protein was produced in transgenic tuberous roots. Overall results indicated that sweet potato would be an excellent host to produce human therapeutic proteins.

• EDISON SW 활용 경진대회 논문집
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• 제3회(2014년)
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• pp.425-429
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• 2014

Half-metallic nanostructure is highly applicable in the field of Spintronics and electronic device technology. We examine the electronic properties of a ferrocene-based nanowire as a possible candidate for a half-metallic nanostructure using VASP and SIESTA. Ferrocene-based nanowire shows high stability in both binding energy simulation and molecular dynamics (MD) simulation. The density of states (DOS) and the projected DOS of the ferrocene-based nanowire indicate that one-dimensional clustering of ferrocene molecules can be explained because of p-d orbital hybridization between iron and carbon. Half-metallic property and energy dispersion at the Fermi level due to one-dimensional structure is also observed from the DOS results.

• Korean Journal of Acupuncture
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• 제19권1호
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• pp.67-75
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• 2002

목적 : 자성(雌性) 흰쥐에서 phenylhydrazine으로 유발된 용혈성 빈혈에 오미자 약침의 항빈혈효과를 알아보기 위해서 적혈구수, hematocrit ratio, hemoglobin, 혈청 철함유량 및 serum total iron binding capacity (TIBC)를 관찰하였다. 방법 : 실험동물은 정상군, 대조군, 250 mg/kg 오미자 투여군 및 500 mg/kg 오미자 투여군으로 총 4개의 군으로 분류하였다. 정상군의 흰쥐는 아무런 처치도 하지 않았고, 대조군은 phenylhydrazine으로 용혈성 빈혈을 유발하였다. 오미자 투여군은 용혈성 빈혈을 유발한 후 7일간 매일 250 mg/kg 및 500 mg/kg의 용량으로 중완혈에 자침하였다. 결과 : 적혈구수, hematocrit ratio 및 hemoglobin은 대조군에서 정상군에 비해 감소한 반면 오미자 투여군은 증가하였다. 혈청 철함유량과 TIBC는 대조군에서 증가하였으나, 오미자 투여군에서는 감소하였다. 이러한 결과로 중완혈에 오미자 자침은 phenylhydrazine으로 유발된 용혈성 빈혈에서 항빈혈효과가 있는 것으로 사려된다.

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 1996년도 정기총회 및 학술발표회
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• pp.30-30
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• 1996

A suproxide dismutase gene of Aquifex pyroprolus, a novel marine hypenhermophilic bacterium, was cloned, expressed, and characterized. The SOD of A pyrophilus (ApSOD) is an iron-containing homo-oligomeric protein with a monomeric molecular weight of 24.2 kDa. the amino acid sequence is similar to those of known Mn- and Fe-SODs from thermophilic archaea, and metal binding residues in all SOD sequences from different species are also conserved in A. pyrophilus SOD. (omitted)

• International Journal of Oral Biology
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• 제43권4호
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• pp.201-207
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• 2018

Porphyromonas gingivalis is among the major etiological pathogens of chronic periodontitis. The virulence mechanisms of P. gingivalis is yet to be identified as its activity is largely unknown in actual disease process. The purpose of this study is to identify antigens of P. gingivalis expressed only in patients with chronic periodontitis using a unique immunoscreening technique. Change Mediated Antigen Technology (CMAT), an antibody-based screening technique, was used to identify virulence-associated proteins of P. gingivalis that are expressed only during infection stage in patients having chronic periodontitis. Out of 13,000 recombinant clones screened, 22 tested positive for reproducible reactivity with rabbit hyperimmune anti-sera prepared against dental plaque samples acquired from periodontitis patients. The DNA sequences of these 18 genes were determined. CMAT-identified protein antigens of P. gingivalis included proteins involved in energy metabolism and biosynthesis, heme and iron binding, drug resistance, specific enzyme activities, and unknown functions. Further analysis of these genes could result in a novel insight into the virulence mechanisms of P. gingivalis.

• 동의생리병리학회지
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• 제22권6호
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• pp.1579-1584
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• 2008

Anemia are often detected among many patients who are treated in oriental traditional medicine hospitals in Korea through blood tests which are taken to diagnose the patients' general state, and most of them are diagnosed to have iron deficiency anemia. This study amis the effect of herbal medicine on the RBC count, hemoglobin, hematocrits and indices of red blood cells such as mean corpuscular volume(MCV), mean corpuscular hemoglobin(MCH), mean corpuscular hemoglobin concentration(MCHC), serum iron, and total iron binding capacity(TIBC) among patients who were treated in oriental medical hospital and diagnosed to have anemia through blood tests other than main symptoms. The subjects of this study were 29 patients(male 7, female 22, mean age: 56.24${\pm}$19.11years) who were chosen ones, they has below hemoglobin 12 gm/dL, serum iron 70 IU/L, MCV 80 fL on laboratory screening test when they first visits our hospital. As a result, the volume of red blood cell(RBC), hematocrit(HCT), and hemoglobin(Hb) in peripheral blood increased from $348.27{\pm}8.95{\times}10^5$ /UL, 28.82${\pm}$0.56%, 9.24${\pm}$0.22 g/dL to $375.62{\pm}9.11{\times}10^5$ /UL, 31.36${\pm}$0.68%, 10.31${\pm}$0.25 g/dL comparing before and after oriental medicine treatment. After the treatment, MCH, MCHC, and MCV also increased from 26.98${\pm}$0.84 Pg, 32.62${\pm}$0.45 g/dl, 79.26${\pm}$0.17 fL to 27.74${\pm}$0.74 Pg, 32.84${\pm}$0.33 g/dl, 84.15${\pm}$1.67 fL. There was statistically significant increase in MCH, MCV(P<0.05); however, there was no significant change in MCHC(P>0.05). The amount of iron in blood increased from 32.96${\pm}$4.20 ug/dL to 67.22${\pm}$7.18 ug/dL, which showed a statistically significant increase(P<0.05). On the other hand, TIBC decreased from 325.08${\pm}$13.97 ug/dL to 315.61${\pm}$18.79 ug/dL, which was not a statistically significant change(P>0.05). Like this, all the patients showed favorable results in anemia based on the measurements of indices of red blood cells except MCHC. According to the classification of herbal medicines, in strengthening energy group(補氣), replenishing blood group(補血), and replenishing both energy and blood group(補氣血), the volume of RBC, HCT, and hemoglobin showed significant increases. Furthermore, in herbal medicines strengthening blood(補血) and replenishing both energy and blood group(補氣血), serum iron also relatively increased compare to strengthening energy group(補氣).

• Journal of Microbiology
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• 제44권1호
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• pp.54-63
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• 2006

Ferritin is a major eukaryotic protein and in humans is the protein of iron storage. A partial gene fragment of ferritin (255 bp) taken from the total RNA of Periserrula leucophryna, was amplified by RT-PCR using oligonucleotide primers designed from the conserved metal binding domain of eukaryotic ferritin and confirmed by DNA sequencing. Using the $^{32}P-labeled$ partial ferritin cDNA fragment, 28 different clones were obtained by the screening of the P. leucophryna cDNA library prepared in the Uni-ZAP XR vector, sequenced and characterized. The longest clone was named the PLF (Periserrula leucophryna ferritin) gene and the nucleotide and amino acid sequences of this novel gene were deposited in the GenBank databases with accession numbers DQ207752 and ABA55730, respectively. The entire cDNA of PLF clone was 1109 bp (CDS: 129-653), including a coding nucleotide sequence of 525 bp, a 5' -untranslated region of 128 bp, and a 3'-noncoding region of 456 bp. The 5'-UTR contains a putative iron responsive element (IRE) sequence. Ferritin has an open reading frame encoding a polypeptide of 174 amino acids including a hydrophobic signal peptide of 17 amino acids. The predicted molecular weights of the immature and mature ferritin were calculated to be 20.3 kDa and 18.2 kDa, respectively. The region encoding the mature ferritin was subcloned into the pT7-7 expression vector after PCR amplification using the designed primers and included the initiation and termination codons; the recombinant clones were expressed in E. coli BL21(DE3) or E. coli BL21(DE3)pLysE. SDS-PAGE and western blot analysis showed that a ferritin of approximately 18 kDa (mature form) was produced and that by iron staining in native PAGE, it is likely that the recombinant ferritin is correctly folded and assembled into a homopolymer composed of a single subunit.