An experiment was conducted to determine the concentration variation of epidermal growth factors(EGF), include insulin-like growth factor -Ⅰ(IGF-Ⅰ), transforming growth factor-beta(TGF-Ⅰ ), and basic fibroblast gr-...An experiment was conducted to determine the concentration variation of epidermal growth factors(EGF), include insulin-like growth factor -Ⅰ(IGF-Ⅰ), transforming growth factor-beta(TGF-Ⅰ ), and basic fibroblast gr-owth factor (bFGF) in colostrum and normal milk of sows within 35 days after parturition. The results showed that the concentration of EGF, IGF-Ⅰ, TGF-β, bFGF was significantly higher in colostrum than that in normal milk. The concentration of these growth factors in colostrum was significantly decreased with the stage lapse of lactation, and then they remained stable in normal milk. Parity had a slight effect on the concentration of these growth factors.展开更多
To further utilize bioactive substance such as bovine colostrum sIgA and IgG, sIgA and IgG were isolated and purified simultaneously by salting out, ultrafiltration and gel chromatography, etc. The analysis of results...To further utilize bioactive substance such as bovine colostrum sIgA and IgG, sIgA and IgG were isolated and purified simultaneously by salting out, ultrafiltration and gel chromatography, etc. The analysis of results were showed quantitatively by nonhydrogenized SDS-PAGE, and quanlities of sIgA and IgG were respectively detected by Western Blot. The results showed that the purity and yield of bovine colostrum sIgA were 85.3% and 42.8%, respectively, while the purity and yield of bovine colostrum IgG were respectively 97.2% and 64.4%. This preparative method provides theoretical and experimental foundation for sIgA industrial production.展开更多
sIgA in bovine colostrum was purified by ultrafiltration and enzymolysis methods in this experiment, and the prepared substance was detected by Western Blot. The purity and yield were up to 73.6% and 65.2%, respective...sIgA in bovine colostrum was purified by ultrafiltration and enzymolysis methods in this experiment, and the prepared substance was detected by Western Blot. The purity and yield were up to 73.6% and 65.2%, respectively. This convenient technique offers helpful exploration for production of bovine colostrum sIgA展开更多
Chemical compositions of bovine colostrum and their change after parturition were studied.Fat,total protein,whey proteins,ash and total solid were higher than those in milk and decreased as lactation time was increase...Chemical compositions of bovine colostrum and their change after parturition were studied.Fat,total protein,whey proteins,ash and total solid were higher than those in milk and decreased as lactation time was increased.Lactose was lower than that in milk and moresed with the increase of lactation time.Whey proteins of colostrum such as Ig,β-Lg,BSA,Lf and LP were obviously higher than those in milk and dccrcascd as lactation time was increased.There were high unsaturated fatty acids in colostrum compared with bovine milk.Na,Cl,Fe,Zn,Cr and Mg in colostrum were higher than those in milk.They fell as lactation time was increased.I,K,P,Mn and Cu increased with the increase of lactation time.Co,As and Pb were not dctccrcd by ICP method.展开更多
背景既往关于口咽初乳对坏死性小肠结肠炎(NEC)发生率影响的文献结论不一。目的系统检索文献,更新Meta分析,探讨口咽初乳能否有效降低NEC发生率。设计系统评价/Meta分析。方法检索英文数据库(PubMed、Embase、Web of Science、Cochrane ...背景既往关于口咽初乳对坏死性小肠结肠炎(NEC)发生率影响的文献结论不一。目的系统检索文献,更新Meta分析,探讨口咽初乳能否有效降低NEC发生率。设计系统评价/Meta分析。方法检索英文数据库(PubMed、Embase、Web of Science、Cochrane Library)和中文数据库(中国知网、万方、维普、中华医学期刊全文数据库),检索时间为建库至2025年1月8日。纳入研究对象为胎龄<37周的新生儿(不限制出生体重),试验组采用口咽初乳、初乳涂抹或初乳滴注,对照组采用等量无菌水、生理盐水进行相同操作或常规护理,结局指标包含NEC的中英文RCT文献。由2名研究者独立筛选文献、提取数据,并根据Cochrane系统评价手册6.1提供的偏倚风险评估工具对文献进行偏倚风险评估。主要结局指标NEC(Ⅱ期或以上)发生率。结果27篇RCT(英文18篇,中文9篇)共纳入2950例早产儿,干预组1462例,对照组1488例。口咽初乳的剂量以0.2 mL为主(89%),间隔时间以2~4 h为主(85%),持续时间以3~7 d为主(70%)。Meta分析显示,干预组NECⅡ期或以上的发生率(65/1462)与对照组(147/1488)差异有统计学意义(OR=0.44,95%CI:0.32~0.61,P<0.01),漏斗图分析显示文献发表偏倚不明显。次要结局指标:口咽初乳可降低新生儿败血症(OR=0.55,95%CI:0.42~0.72)、喂养不耐受(OR=0.46,95%CI:0.27~0.78)、新生儿呼吸机相关性肺炎(VAP,OR=0.51,95%CI:0.29~0.92)发生率,缩短达到完全肠内营养时间[-2.50(-4.08~-0.91)d]、住院时间[-4.43(-6.32~-2.54)d]、抗生素使用时间[-2.56(-4.12~-1.01)d]。干预组和对照组的全因死亡率以及脑室内出血(IVH)、慢性肺病(CLD)、早产儿视网膜病变(ROP)发生率差异均无统计学意义。结论口咽初乳可以降低早产儿NEC、新生儿败血症、喂养不耐受、VAP的发生率,缩短早产儿完全肠内营养时间、住院时间及抗生素使用时间。展开更多
文摘An experiment was conducted to determine the concentration variation of epidermal growth factors(EGF), include insulin-like growth factor -Ⅰ(IGF-Ⅰ), transforming growth factor-beta(TGF-Ⅰ ), and basic fibroblast gr-owth factor (bFGF) in colostrum and normal milk of sows within 35 days after parturition. The results showed that the concentration of EGF, IGF-Ⅰ, TGF-β, bFGF was significantly higher in colostrum than that in normal milk. The concentration of these growth factors in colostrum was significantly decreased with the stage lapse of lactation, and then they remained stable in normal milk. Parity had a slight effect on the concentration of these growth factors.
文摘To further utilize bioactive substance such as bovine colostrum sIgA and IgG, sIgA and IgG were isolated and purified simultaneously by salting out, ultrafiltration and gel chromatography, etc. The analysis of results were showed quantitatively by nonhydrogenized SDS-PAGE, and quanlities of sIgA and IgG were respectively detected by Western Blot. The results showed that the purity and yield of bovine colostrum sIgA were 85.3% and 42.8%, respectively, while the purity and yield of bovine colostrum IgG were respectively 97.2% and 64.4%. This preparative method provides theoretical and experimental foundation for sIgA industrial production.
基金the Science and Technology Foundation of Heilongjiang Province (GA06B201-4)
文摘sIgA in bovine colostrum was purified by ultrafiltration and enzymolysis methods in this experiment, and the prepared substance was detected by Western Blot. The purity and yield were up to 73.6% and 65.2%, respectively. This convenient technique offers helpful exploration for production of bovine colostrum sIgA
文摘Chemical compositions of bovine colostrum and their change after parturition were studied.Fat,total protein,whey proteins,ash and total solid were higher than those in milk and decreased as lactation time was increased.Lactose was lower than that in milk and moresed with the increase of lactation time.Whey proteins of colostrum such as Ig,β-Lg,BSA,Lf and LP were obviously higher than those in milk and dccrcascd as lactation time was increased.There were high unsaturated fatty acids in colostrum compared with bovine milk.Na,Cl,Fe,Zn,Cr and Mg in colostrum were higher than those in milk.They fell as lactation time was increased.I,K,P,Mn and Cu increased with the increase of lactation time.Co,As and Pb were not dctccrcd by ICP method.
