• 한국식품영양과학회지
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• 제28권3호
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• pp.685-690
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• 1999

The insulin like growth factors(IGFs) are bound to several binding proteins(IGFBPs) that appear to regulate IGF transfort, receptor binding, and its action. The concentrations of these peptides are regulated by quantity and nutritional quality of dietary proteins. The aim of this study was to compare the effects of two diets, which differed in their protein source, Carassius carassius(CC), Carassius carassius hot water extract(CCHE), for 4 weeks. Body weight was significantly increased in the CC group(74.14$\pm$12.00 to 266.31$\pm$36.62g; p<0.01). Likewise, IGF I concentration of CC group(101.76$\pm$15.90 ng/ml) was significantly higher than that of CCHE group(38.50$\pm$ 11.20ng/ml; p<0.05). By western immunoblot analysis, especially IGFBP 1, 2 levels are increased, whereas IGFBP 3 level was de creased in CCHE group. After extraction of browning material from each samples, the extractive was filtered and absorbance at 420nm was measured. The absorbance of CCHE group was significantly higher than that of CC group. These results suggest that IGF I can be employed as an index of protein metabolism, particulary as a simple index in the assessing the status of protein nutrition.

• 대한소아치과학회지
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• 제50권3호
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• pp.334-346
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• 2023

이 연구의 목적은 Skeletal maturity indicator (SMI) 및 Middle phalanx of the third finger (MP3)와 혈청 Insulin-like growth factor-1 (IGF-1) 및 Insulin-like growth factor binding protein-3 (IGFBP-3)의 상관 관계를 통해 골격적 성숙도의 예측 지표로 사용될 수 있는지 알아보는 것이다. 2018년 1월부터 2022년 12월까지 아주대학교 치과병원 및 소아청소년과에 내원한 만 7세 이상 17세 이하 환자 205명의 의무기록을 후향적으로 분석하였다. 혈청 IGF-1 농도는 SMI 6 - 8, MP3 - G에서 가장 높았고(p < 0.0001) 혈청 IGFBP-3 농도는 SMI 9 - 10, MP3 - I에서 가장 높았다(p = 0.010, 0.030). SMI, MP3와 혈청 IGF-1 농도 간 비교적 높은 Pearson 상관계수를 나타냈다(r = 0.698, 0.622, p < 0.0001). 혈청 IGF-1는 소아청소년의 골격적 성숙도를 평가하는 보조적 수단으로 활용될 수 있을 것이며 임상적으로는 472 ㎍/L에서 510.63 ㎍/L의 범위를 최대성장기로 고려할 수 있다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제33권6호
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• pp.617-624
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• 2007

Insulin-like growth factor(IGF) is the most abundant growth factor in bone matrix. Recent studies have shown that it can sensitize apoptotic cell death of osteoblasts. Thus, this study investigated whether IGF-II aggravates irradiation-induced cell death of osteoblasts. Cultured MC3T3 osteoblasts were irradiated and IGF-II was added at the concentration of 50 ng/ml immediately after the irradiation. Cell viability was measured by MTT assay. Changes in cell death and cell cycle were analyzed by flow cytometry. The expression of proapoptotic gene bax and antiapoptotic gene bcl-2 was quantified by real time RT-PCR and Western blot. A dose of 30 Gy caused G2/M arrest and increased cell death through both necrosis and apoptosis, while irradiation from 4 to 10 Gy little affected cell cycle and death. IGF-II treatment reduced cell viability without stimulating cell proliferation and changing cell cycle. Combined treatment of IGF-II with irradiation decreased cell viability and proliferation and increased cell death along with G2/M arrest. These effects were not different from those of irradiation only. At transcriptional and protein levels, IGF-II treatment did not affect bax and bcl-2 expression, whereas irradiation increased the expression ofbax without changes in bcl-2. IGF-II in combination with irradiation showed similar findings. These results suggest that IGF-II could modulate apoptotic cell death through mechanisms other than an imbalance between bax and bcl-2 gene expression, although its effect was overridden by irradiation.

• Asian-Australasian Journal of Animal Sciences
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• 제33권10호
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• pp.1674-1682
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• 2020

Objective: This study aimed to elucidate the effect of miR-140 on the proliferation of porcine fetal fibroblasts (PFFs) and identify the target genes of miR-140 in PFFs. Methods: In this study, bioinformatics software was used to predict and verify target genes of miR-140. Quantitative polymerase chain reaction and western blot were used to detect the relationship between miR-140 and its target genes in PFFs. Dual luciferase reporter gene assays were performed to assess the interactions among miR-140, type 1 insulin-like growth factor receptor (IGF1R), and SRY-box 4 (SOX4). The effect of miR-140 on the proliferation of PFFs was measured by CCK-8 when PFFs were transfected with a miR-140 mimic or inhibitor. The transcription factor SOX4 binding to promoter of IGF1R was detected by chromatin immunoprecipitation assay (ChIP). Results: miR-140 directly targeted IGF1R and inhibited proliferation of PFFs. Meanwhile, miR-140 targeted transcription factor SOX4 that binds to promoter of porcine IGF1R to indirectly inhibit the expression of IGF1R. In addition, miR-140 inhibitor promoted PFFs proliferation, which is abrogated by SOX4 or IGF1R knockdown. Conclusion: miR-140 inhibited PFFs proliferation by directly targeting IGF1R and indirectly inhibiting IGF1R expression via SOX4, which play an important role in the development of porcine fetal.

• Fisheries and Aquatic Sciences
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• 제21권2호
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• pp.4.1-4.5
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• 2018

Insulin-like growth factors (IGFs), along with IGF-binding protein and IGF receptor, are well-known regulators in the growth and survival of vertebrates. In this study, we investigated the involvement of IGFs and protein variation during embryonic development of the olive flounder (Paralichthys olivaceus). Morphological stages were divided into six main developments as blastula, gastrula, cephalization, cranial regionalization, tail lift, and hatch. During embryonic development, protein variation was investigated using sodium dodecyl sulfate-polyacrylamide gel electrophoresis and electrospray ionization quadrupole time-of-flight mass spectrometry/mass spectrometry. In addition, the mechanism of signaling of IGF-I receptor was examined using immuno-blot analysis. We found marked changes in protein expression at four stages of embryonic development and identified proteins as belonging to the vitellogenin 2 family. As development progresses, expression of IGF-II, phosphotyrosine, and phospho-Akt increased, while expression of growth factor receptor-bound protein 2 (GRB2) and one of guanine-nucleotide-binding proteins (Ras) decreased. These results provide basic information on the IGF system in the embryonic development of the olive flounder.

• Clinical and Experimental Pediatrics
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• 제51권12호
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• pp.1329-1335
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• 2008

목 적: 저자들은 한국 소아발육 표준치를 이용하여 25-50백분위수에 속하는 정상대조군 환자들의 혈중 I형 인슐린 양 성장인자(IGF-I)와 인슐린 양 성장인자 결합단백-3 (IGFBP-3) 농도의 SD치를 이용하여, 성장호르몬 결핍증을 진단하는데 있어서 검색검사로서의 진단적 유용성에 대한 분석을 시도하였다. 방 법: 성장호르몬 결핍증 환아 31명, 정상대조군 230명(남아 129명, 여아 101명)을 대상으로 하였다. 성장호르몬 결핍증 환자는 완전 결핍증 14명(남아 12명, 여아 2명), 부분 결핍증 17명(남아 9명, 여아 8명) 이었다. 연령분포는 7세에서 15세 사이였다. IGF-I은 RIA 방법으로, IGFBP-3는 IRMA 방법으로 측정하였다. 결 과: ROC 분석을 통해 얻어진 가장 가능성이 높은 절단치는 정상대조군에서 얻어진 혈중 농도의 -1 표준 편차에 해당하는 값과 유사하였다. 이를 토대로 하여 정상키를 가진 대조군의 혈중 IGF-I 농도의 -1 표준편차 값을 기준 절단치로 잡아 7-9세군, 10-12세군, 13-14세군 각각에서의 성장호르몬 결핍증의 민감도와 특이도를 계산하였을 때 민감도는 87.5-100%였고 특이도는 80-84.6%로 비슷하게 나타났다. 혈중 IGFBP-3는 민감도는 58.7-85.7%로 다소 차이가 많았고 특이도는 79.2-85.5%로 유사하였다. 전체 연령군을 대상으로 한 혈중 IGF-I의 진단적 정확도는 완전결핍 군에서 78.5%, 불완전결핍 군에서는 94.1%였다. 혈중 IGFBP-3의 진단적 정확도는 완전결핍 군에서 83.3%, 불완전결핍 군에서는 76.5%였다. 결 론: 성장호르몬 결핍증을 진단하기 위해서 외래에서 시행하는 일회성 검색검사로 혈중 IGF-I 및 IGFBP-3농도의 측정은 신체계측, 방사선학적 검사법등과 함께 유용하게 사용될 수 있을 것으로 판단되며, 본 연구에서는 절단치를 대조군으로부터 얻어진 혈중 평균농도치의 -1 표준 편차 값으로 잡았을 때 비교적 만족할 만한 결과를 얻었다고 생각한다.

• Reproductive and Developmental Biology
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• 제41권3호
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• pp.51-55
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• 2017

The production of therapeutic protein from transgenic domestic animal is the major technology of biotechnology. Insulin-like growth factor-1 (IGF-1) is known to play an important role in the growth of the animal. The objective of this study is construction of knock-in vector that bovine IGF-1 gene is inserted into the exon 7 locus of ${\beta}$-casein gene and expressed using the gene regulatory DNA sequence of bovine ${\beta}$-casein gene. The knock-in vector consists of 5' arm region (1.02 kb), bIGF-1 cDNA, CMV-EGFP, and 3' arm region (1.81 kb). To express bIGF-1 gene as transgene, the F2A sequence was fused to the 5' terminal of bIGF-1 gene and inserted into exon 7 of the ${\beta}$-casein gene. As a result, the knock-in vector is confirmed that the amino acids are synthesized without termination from the ${\beta}$-casein exon 7 region to the bIGF-1 gene by DNA sequence. These knock-in vectors may help to create transgenic dairy cattle expressing bovine bIGF-1 protein in the mammary gland via the expression system of the bovine ${\beta}$-casein gene.

• Clinical and Experimental Pediatrics
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• 제48권11호
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• pp.1172-1178
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• 2005

목 적 : 소아 비만은 전세계적으로 증가하고 있는 추세이며, 신체적으로나 정신적으로 장애를 일으킨다. 특히 고혈압, 관상동맥질환, 당뇨병 등의 성인병이 문제가 되고 있다. 이에 비만 청소년에서 혈중 인슐린, 인슐린저항지수, 유리 지방산, IGF-I, IGFBP-3를 측정하였고, 심혈관 질환으로 진행할 수 있는 위험인자로 유용한지 알아보기 위해 본 연구를 실시하였다. 방 법 : 64명의 중등도 이상의 비만 청소년를 대상군으로 하였고, 같은 연령의 정상 청소년 20명을 대조군으로 하였다. 신장, 체중을 이용하여 비만도와 체질량지수를 산출하였고, 안정된 상태에서 수축기, 이완기 혈압을 측정하였다. 10시간 이상 금식 후 총 콜레스테롤, 중성지방, HDL 콜레스테롤, LDL 콜레스테롤, AST, ALT, 혈당, 인슐린, 유리지방산, IGF-I, IGFBP-3를 측정하였다. 결 과 : 인슐린은 비만군에서 $15.6{\pm}7.0{\mu}IU/mL$로 정상군보다 유의하게 높았고(P<0.01), 인슐린저항지수도 비만군에서 $64.6{\pm}31.6$으로 정상군보다 유의하게 높았다(P<0.01). IGF-I은 비만군에서 $498.1{\pm}122.2ng/mL$로 정상군보다 유의하게 높았고(P<0.05), IGFBP-3도 비만군에서 $3,777{\pm}4,721ng/mL$로 정상군보다 유의하게 높았다(P<0.05). 인슐린은 체질량지수(r=0.394), 비만도(r=0.304)와 양의 상관관계를 나타냈다. IGFBP-3는 비만도(r=0.419), 이완기 혈압(r=0.264), 체질량지수(r=0.247)와 양의 상관관계를 보였다. 인슐린저항지수는 체질량지수(r=0.595), 혈중 중성지방(r=0.515), 비만도(0.469)와 양의 상관관계를 나타냈다. 결 론 : 비만 청소년에서 혈중 인슐린, 인슐린저항지수, IGF-I, IGFBP-3가 증가하였다. 청소년 비만에서 이들 검사는 심혈관질환으로의 진행을 예측하는데 유용하리라 생각한다.

• 한국가정과학회지
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• 제9권1호
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• pp.81-88
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• 2006

IGFs and IGFBPs have an important role in controlling glucose homeostasis. This study was conducted to investigate the changes of insulin-like growth factor(IGF)-I. IGF-II and IGF binding proteins (IGFBPs) on fasting and postprandial state in Korean diabetes, Twenty eight healthy subjects and fifty seven diabetic patients participated in this study. The healthy subjects were not knowingly suffered from any disease and were not receiving any medical treatment, and diabetic subjects were undergo medical treatment, continuously. Weight and height were measured and body mass index (BMI) was calculated as weight (kg) divided by the square of height (m2). Blood pressure was measured. Plasma lipid profiles were analyzed by enzymatic methods, plasma Insulin and glucose levels were measured in fasting and postprandial state, respectively. The levels of serum IGFs and IGFBP-3 were measured by radioimmunoassay (RIA). The levels of glucose and insulin were significantly higher in diabetes than normal subjects on fasting as well as postprandial state (p<0.0l). The levels of IGF-I was significantly lower in diabetes than normal subjects, however in postprandial state, there was no significant difference between diabetes and control subjects, The levels of IGF-II were significantly lower in diabetes than control subjects both fasting and postpradial state, The level of IGFBP-3 were not significantly different between diabetes and normal subjects. Fasting IGF-I, IGF-II and IGFBP-3 levels were positively correlated with those levels on postprandial state, fasting IGe levels of IGF-I levels were positively correlated with fasting insulin levels, and postprandial IGF-I levels were positively correlated with fasting glucose, postprandial insulin and postprandial insulin levels, plasma triglyceride levels were correlated with plasma triglyceride levels. The IGFBP-3 levels were not correlated with IGF components, glucose, insulin and plasma lipids, These results demonstrate that in diabetes, the components IGF-I/IGFBPs system were significantly correlated with plsma glucose and insulin levels both fasting and postprandial state.

• 한국수정란이식학회지
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• 제13권3호
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• pp.245-249
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• 1998

본 연구는 성장인자 EGF, IGF-1, EGF+IGF-1 이 소 난포란의 체외성숙에 미치는 영향을 규명하기 위하여 실시하였다. 소 난포란의 체외성숙 시 EGF를 농도별 (10, 50 및 100ng/m1)로 첨가하여 실험한 결과 통계학적 유의성은 인정되지 않았으나 24시간 배양 후 성숙율은 대조군에 비하여 높은 경향을 나타내었다. 소난포란의 체외성숙 시 EGF와 IGF-1을 병용 처리하여 실험한 결과, EGF 또는 IGF-1 단독처리 군에 비하여 병용처리군이 유의적으로 높은 체외성숙율을 나타내었다(p〈0.05). 따라서 소난포란의 체외성숙율은 EGF와 IGF-1에 의하여 영향을 받으며 특히 EGF와 IGF-1의 상호작용에 의하여 더 유효한 효과를 나타내는 것으로 사료된다.