• Asian-Australasian Journal of Animal Sciences
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• 제24권5호
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• pp.670-677
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• 2011

The growth rate of the young pig is generally much less than it's potential and may be constrained by endocrine status as well as nutrient intake. Growth factors are present in relatively high quantities in colostrum and play an important part in gut development. It is possible that supplementation of colostrum protein isolate may stimulate gut and whole body growth in the pig. Eight male and 8 female (Large Whitex${\times}$Landrace) piglets were weaned at 1 d of age after each pig had obtained colostrum from their dam, and were trained to consume one of two liquid diets. The two diets were based on either a colostrum protein isolate (n = 4 males and 4 females) or whey protein concentrate (n = 4 males and 4 females) and were formulated to contain equal levels of crude protein and amino acids. Pigs were fed their diets ad libitum for 28 days after which time 12 pigs were euthanised and various tissues and organs weighed. Pigs were bled for IGF-I analyses at 21 and 28 days of age. Daily gain was higher in pigs consuming the colostrum isolate (171 vs. 216 g/d, p = 0.010), particularly between 2 and 4 weeks of age (212 vs. 298 g/d, p = 0.010). Pigs tended to consume more of the liquid feed containing colostrum isolate (25.5 vs. 29.1 kg, p = 0.074) and gained more live weight per unit of liquid feed (0.203 vs. 0.223 g/g, p = 0.056). There were no effects of sex on growth performance. Pigs consuming the diet supplemented with colostrum isolate had higher (p<0.05) full gut weight (445 vs. 554 g, p = 0.026), empty gut weight (356 vs. 463 g, p = 0.008), stomach weight (42.2 vs. 54.4 g, p = 0.001), small intestine weight (222 vs. 275 g, p = 0.025) and large intestine weight (63.7 vs. 98.0 g, p = 0.005). Plasma IGF-I (99 vs. 150 ng/ml, p<0.001) and IGF-II (265 vs. 406 ng/ml, p<0.001) were higher in pigs fed colostrum isolate. Pigs consuming colostrum protein isolate ate more, grew faster and had higher plasma IGF-I concentrations than pigs consuming a diet with similar macronutrient content but devoid of growth factors.

• Asian Pacific Journal of Cancer Prevention
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• 제16권9호
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• pp.3667-3671
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• 2015

Invasion and metastasis is the major cause of tumor recurrence, difficulty for cure and low survival rate. Excavating key transcription factors, which can regulate tumor invasion and metastasis, are crucial to the development of therapeutic strategies for cancers. PU.1 is a master hematopoietic transcription factor and a vital regulator in life. Here, we report that, compared to adjacent non-cancerous tissues, expression of PU.1 mRNA in metastatic hepatocellular carcinoma (HCC), but not primary HCC, was significantly down-regulated. In addition, levels of PU.1 mRNA in metastatic hepatoma cell lines MHCC97L and MHCC97H were much lower than in non-metastatic Hep3B cells. Transwell invasion assays after PU.1 siRNA transfection showed that the invasion of hepatoma cell lines was increased markedly by PU.1 knockdown. Oppositely, overexpression of PU.1 suppressed the invasion of these cells. However, knockdown and overexpression of PU.1 did not influence proliferation. Finally, we tried to explore the potential mechanism of PU.1 suppressing hepatoma cell invasion. ChIP-qPCR analysis showed that PU.1 exhibited a high binding capacity with miR-615-5p promoter sequence. Overexpression of PU.1 caused a dramatic increase of pri-, pre- and mature miR-615-5p, as well as a marked decrease of miR-615-5p target gene IGF2. These data indicate that PU.1 inhibits invasion of human HCC through promoting miR-615-5p and suppressing IGF2. These findings improve our understanding of PU.1 regulatory roles and provided a potential target for metastatic HCC diagnosis and therapy.

• Clinical and Experimental Pediatrics
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• 제49권1호
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• pp.93-98
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• 2006

목 적 : 재태연령 34주 이상의 적정체중아(appropriate for gestational age, AGA)에서 제대혈의 ghrelin과 leptin의 농도를 측정하고 출생체중, 체질량지수(body mass index, BMI) 등의 신체계측치와의 연관성 및 IGF-I, IGFBP-3와 같은 성장과 관련된 호르몬과의 관계에 대해 알아보았다. 방 법 : 재태연령 34주에서 42주 미만의 신생아 중 재태기간과 비교해 적정체중을 가진 건강한 남아 31명과 여아 29명을 대상으로 하였다. 대상 신생아의 출생체중, 체질량지수를 계측하고 제대정맥혈을 채취하여 ghrelin, leptin, IGF-I 및 IGFBP-3 농도를 측정하여 분석하였다. 결 과 : 대상 신생아들의 제대혈에서 ghrelin 농도($528.3{\pm}307.3pg/mL$)는 신생아의 출생체중(r=-0.29, P<0.05)과 재태연령(r=-0.28, P<0.05)과 반비례하였다. 한편, 대상 신생아 제대혈의 leptin 농도($4.43{\pm}3.66ng/mL$)는 신생아의 출생체중(r=0.44, P<0.01), 재태연령(r=0.36, P<0.01), 체질량지수(r=0.28, P<0.05) 등과 비례하였다. 제대혈의 ghrelin 농도는 성별에 따른 차이가 없었으나 leptin 농도는 여아($5.45{\pm}4.32ng/mL$)에서가 남아($3.48{\pm}2.64ng/mL$)에서보다 유의하게 높았으며(P<0.05), 특히 재태연령 37주 이상인 군에서 성별에 따라 뚜렷한 차이를 보였다(P<0.01). 제대혈의 ghrelin과 leptin 농도 사이에서는 의미있는 상관관계가 없었으며, ghrelin 농도와 제대혈의 IGF-I 및 IGFBP-3 사이에서도 역시 의미있는 상관관계가 없었다. 결 론 : 적정체중을 가진 신생아의 제대혈 ghrelin 농도는 출생체중 및 재태연령에 반비례하였다. 제대혈의 leptin 농도는 신생아의 출생체중, 재태연령 및 체질량지수 등의 신체계측치에 비례하였으며 여아에서 남아에서보다 더 높은 농도를 나타냈다. 제대혈의 ghrelin과 leptin 농도 사이에는 특별한 상관관계가 없었다. 앞으로 이들 물질이 태아 성장에 생리적, 병리적으로 상호 어떤 역할을 하는지 규명하기 위해 더 많은 연구가 필요할 것으로 생각된다.

• 대한본초학회지
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• 제24권4호
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• pp.149-157
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• 2009

Objectives : This study was designed to investigate the effects of Cheunggyeongsamul-tang extract on the growth of longitudinal bone in adolescent female rats. Methods : Longitudinal bone growth was measured by fluorescent microscopy. To examine the effects on the growth plate metabolism, the total height of growth plate, the induction of local insulin-like growth factor-1 (IGF-1), IGF-1 receptor, bone morphogenetic protein-2 (BMP-2), BMPR-1A, indian hedgehog (IHH), and parathyroid hormone-related protein (PTH-rP) were measured. Results : Cheunggyeongsamul-tang extract enhanced longitudinal bone growth and total height of the growth plate. Also, it promoted the induction of local IGF-1, BMP-2, IHH and PTH-rP of the growth plate. Conclusions : This study shows that the Cheunggyeongsamul-tang extract effects longitudinal bone growth in adolescent rats and might be used for both stunted adolescents and inherent growth failure patients.

• Journal of Animal Science and Technology
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• 제51권6호
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• pp.459-470
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• 2009

The aim of this study was to analyze the proteome of proliferating bovine satellite cells from longissimus dorsi, deep pectoral and semitendinosus muscle depots which had been subjected to hormonal deprivation or addition in culture. For hormone deprivation or addition studies, the cells were either grown in 10% charcoal-dextran stripped fetal bovine serum (CD-FBS) or in 10% FBS supplemented medium. Further to analyze the effect of insulin like growth factor (IGF-1) and testosterone (TS), the cells were grown in 10% CD-FBS containing IGF-1 (10 ng/ml) or TS (10 nM). Results have shown that hormone deprivation had a negative impact on proliferation of the cells from each of the muscle depots. In case of IGF-1 and TS addition, the proliferation levels were low compared with that of the cells grown in 10% FBS. Hence, to gain the insights of the proteins that are involved in such divergent levels of proliferation, the proteome of such satellite cells proliferating under the above mentioned conditions were analyzed using 2D-DIGE and MALDI-ToF/ToF. Thirteen proteins during hormone deprivation and nine proteins from hormone addition were found to be differentially expressed in all the cultures of the cells from the three depots. Moreover, the results highlighted in this study offer a role for each differentially expressed protein with respect to its effect on positive or negative regulation of cell proliferation.

• Journal of Animal Science and Technology
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• 제55권2호
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• pp.95-101
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• 2013

The present study was conducted to test a hypothesis that pork quality traits would be influenced by the systemic and/or local bioavailability of insulin-like growth factor-I (IGF-I), transforming growth factor-${\beta}1$ (TGF-${\beta}1$), or epidermal growth factor (EGF) before or at slaughter. To this end, 60 cross-bred female market pigs weighing approximately 110 kg were slaughtered, after which Longissimus dorsi muscle (LM) samples taken at slaughter (D 0) and blood samples taken at D -7 and D 0 were analyzed. The 60 carcasses rendered 36 RFN (reddish-pink, firm, and non-exudative), 16 RSE (reddish-pink, soft, and exudative), and 6 PSE (pale, soft, and exudative); 2 DFD (dark, firm, and dry) also were found but were excluded in subsequent experiments. The $L^*$ and drip loss were greater in PSE vs. RFN and RSE and in PSE and RSE vs. RFN, respectively, as they should (P<0.05). The $pH_{45min}$ was less in PSE vs. RFN (P<0.05); $pH_{24h}$ tended to be less in the former (P=0.09). The LM IGF-I and TGF-${\beta}1$ as well as serum EGF concentrations were less in PSE than in RFN. None of the other LM and serum concentrations of the three growth factors differed across the three pork quality categories. The LM IGF-I and TGF-${\beta}1$ concentrations and serum EGF concentration at D 0 were negatively correlated with drip loss [r = -0.36(P<0.01), -0.44 (P<0.01), and -0.32 (P<0.05), respectively]. However, none of the serum and LM growth factor variables was correlated with $L^*$ or $a^*$ (redness) of LM. Taken together, results suggest that locally expressed IGF-I and TGF-${\beta}1$ and blood-borne EGF may have a beneficial effect on postmortem water holding capacity of the muscle and that pork quality traits could be predicted to some extent from concentrations of IGF-I and TGF-${\beta}1$ in muscle and EGF in serum at slaughter.

• Asian Pacific Journal of Cancer Prevention
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• 제15권13호
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• pp.5137-5142
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• 2014

Adriamycin (ADR) is an important chemotherapeutic agent frequently used in treatment of breast cancer. However, resistance to ADR results in treatment failure in many patients. Recent studies have indicated that microRNAs (miRNAs) may play an important role in such drug-resistance. In the present study, microRNA-452 (miR-452) was found to be significantly down-regulated in adriamycin-resistant MCF-7 cells (MCF-7/ADR) compared with the parental MCF-7 cells by miRNA microarray and real-time quantitative PCR (RT-qPCR). MiR-452 mimics and inhibitors partially changed the adriamycin-resistance of breast cancer cells, as also confirmed by apoptosis assay. In exploring the potential mechanisms of miR-452 in the adriamycin-resistance of breast cancer cells, bioinformatics analysis, RT-qPCR and Western blotting showed that dysregulation of miR-452 played an important role in the acquired adriamycin-resistance of breast cancer, maybe at least in part via targeting insulin-like growth factor-1 receptor (IGF-1R).

• Genomics & Informatics
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• 제6권1호
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• pp.32-35
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• 2008

Little evidence supports the existence of imprinted genes in chicken. Imprinted genes are thought to be intimately connected with the acquisition of parental resources in mammals; thus, the predicted lack of this type of gene in chicken is not surprising, given that they leave their offspring to their own heritance after conception. In this study, we identified several imprinted genes and their orthologs in human, mouse, and zebrafish, including 30 previously identified human and mouse imprinted genes. Next, using the HomoloGene database, we identified six orthologous genes in human, mouse, and chicken; however, no orthologs were identified for SLC22A18, and mouse Ppp1r9a was not included in the HomoloGene database. Thus, from our analysis, four candidate chicken imprinted genes (IGF2, UBE3A, PHLDA2, and GRB10) were identified. To expand our analysis, zebrafish was included, but no probe ID for UBE3A exists in this species. Thus, ultimately, three candidate imprinted genes (IGF2, PHLDA2, and GRB10) in chicken were identified. GRB10 was not significant in chicken and zebrafish based on the Wilcoxon-Mann-Whitney test, whereas a weak correlation between PHLDA2 in chicken and human was identified from the Spearman's rank correlation coefficient. Significant associations between human, mouse, chicken, and zebrafish were found for IGF2 and GRB10 using the Friedman's test. Based on our results, IGF2, PHLDA2, and GRB10 are candidate imprinted genes in chicken. Importantly, the strongest candidate was PHLDA2.

• Journal of Animal Science and Technology
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• 제47권5호
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• pp.905-912
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• 2005

낙각시기는 MPA을 투여 하였을때 엘크 및 꽃사슴에서 처리 후 평균 21일에 낙각이 되었으며, 대조구에 비하여 엘크는 평균 37일 꽃사슴은 24일 낙각시기가 빨랐다(P<0.01). MPA 투여구에서는 꽃사슴과 엘크 모두 절각 후 재생뿔이 발생되었으며, 뿔 성장기간은 두 품종 모두 대조구보다 MPA 투여구가 2배정도 길었다. 녹용 총 생산량은 엘크의 경우 대조구 및 MPA 투여구가 각각 7.31, 10.11kg 이였고, 꽃사슴은 1.00, 1.41kg으로 MPA 투여구가 유의적으로 많았다.꽃사슴과 엘크사슴의 낙각이 될때의 혈중 testosterone 농도는 4.0ng/ml 이하였으며, 사슴뿔의 성장기간 동안에도 4.0ng/ml 이하를 나타내었다. 녹용 성장기의 꽃사슴과 엘크 사슴의 혈중 IGF-Ⅰ 농도는 사슴뿔의 성장곡선과 같이 IGF-Ⅰ의 농도도 증가하는 경향을 나타내었다.

• Asian-Australasian Journal of Animal Sciences
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• 제17권6호
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• pp.784-793
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• 2004

Major objective was to evaluate three doses of bST (POSILAC(R)) injected into Holstein cows during the transition period and through 56 d of lactation for potential to improve DMI, BCS, BW, metabolites, hormones, IGF-I and milk production. Biweekly injections of bST (0, 5.1, 10.2, or 15.3 mg bST/d) began 28 d before expected parturition and continued through 56 d postpartum. Twenty-three of the 25 multiparous Holstein cows assigned randomly to four groups completed experiment (7, 5, 6 and 5 cows/group, respectively). The DMI, BW and BCS were recorded weekly throughout the prepartum and postpartum periods and blood samples were collected thrice weekly for analyses of ST, insulin, $T_{4}$, $T_{3}$, IGF-I, glucose and NEFA. Milk yields were recorded daily through 60 d postpartum and milk components measured once weekly. Mathematical model for data analyses for prepartum and postpartum periods included treatment, calving month, and the two-factor interaction. Cows injected with 10.2 and 15.3 mg bST prepartum had greater mean prepartum concentrations of ST and IGF-I. Prepartum injections of bST did not affect prepartum BW or BCS. On average, cows injected postpartum better maintained their BCS during first 60 d of lactation (3.15$\pm$0.06, 3.12$\pm$0.007, 3.20$\pm$0.006 and 3.58$\pm$0.009). Treatments did not affect mean prepartum DMI but cows injected with 15.3 mg bST/d had greatest DMI and greatest mean daily MY during the first 3 wk and tended to be greater during first 60 d of lactation. Cows injected with two highest bST doses (10.1 and 15.2 mg/d) had greater mean postpartum concentrations of ST and $T_{3}$, but IGF-I, $T_{4}$, glucose and NEFA did not differ across groups. No adverse effects of bST treatment were observed.