Major royal jelly protein 1（MRJP1）, designated apalbumin 1, has been regarded as a freshness marker of royal jelly（RJ）. A MRJP1-specific peptide（IKEALPHVPIFD） identified by bioinformatics analysis of homologous ...Major royal jelly protein 1（MRJP1）, designated apalbumin 1, has been regarded as a freshness marker of royal jelly（RJ）. A MRJP1-specific peptide（IKEALPHVPIFD） identified by bioinformatics analysis of homologous members of the major royal protein family was synthesized and used to raise polyclonal anti-MRJP1 antibody（antiSP-MRJP1 antibody）. Western blot analysis showed that anti-SP-MRJP1 antibody only reacted with MRJP1 in RJ. In contrast, the previously reported antibody against recombinant MRJP1（anti-R-MRJP1 antibody） reacted with other members of MRJP family in RJ. Enzyme-linked immunosorbent assay（ELISA） using anti-SP-MRJP1 antibody demonstrated that MRJP1 content in RJ stored at 40 °C significantly degraded by 37.3%, 55.9%, 58.0%, 60.6%, 65.7%, 72.7%, and 73.1% at 7, 14, 21, 28, 35, 42, and 49 d, respectively, when compared with MRJP1 content in fresh RJ（0 d）. Optical density analysis of MRJP bands from sodium dodecyl sulfate-polyacrylamide gel electrophoresis（SDS-PAGE） profiles demonstrated that the degradation of MRJP1, MRJP2, MRJP3, and MRJP5 in RJ was strongly and positively correlated with the period of storage（P〈0.0001）. Our results indicated anti-SP-MRJP1 antibody was highly specific for MRJP1, and ELISA using the antibody is a sensitive and easy-to-use method to determine the freshness and authenticity of RJ.展开更多
Royal jelly （R J） is a well-known bioactive substance. It contains large amounts of major royal jelly proteins （MRJPs）, which express growth-factor-like activity in several animal and human cell lines. However, th...Royal jelly （R J） is a well-known bioactive substance. It contains large amounts of major royal jelly proteins （MRJPs）, which express growth-factor-like activity in several animal and human cell lines. However, the question on whether MRJPs possess growth-factor-like activity on all types of cell cultures remains. In order to determine whether MRJPs can be used as an alternative to fetal bovine serum （FBS） in different types of human cell culture, the prolif- eration of the complex serum with different ratios of MRJPs/FBS （M/F） was evaluated on five cell lines： 293T, HFL-I, 231, HCT116, and Changliver using MTT （3-（4,5-dimethyl-2-thiazolyl）-2,5-diphenyl-2H-tetrazolium bromide） assay. The proliferation activity of the combination of the complex M/F serum with cytokines on the test cell lines was also measured. The results demonstrated that the complex serum with M/F 6/4 possessed the highest proliferation activity similar to or in excess of FBS. However, no activity of complex medium with M/F 6/4 was observed in 231 cells, indicating a selectivity of MRJPs on cell types. Compared with the complex medium with M/F 6/4, the complex medium with M/F 6/4 together with two cytokines, epidermal growth factor （EGF） and insulin-transferrin-selenium （ITS）, pro- moted proliferations of Changliver, 293T, HCT116, and H FL-I by 18.73%-56.19% （P〈0.01）. Our findings demonstrate that MRJPs could partially replace FBS in culturing many human cell lines.展开更多
采用超滤方法从鲜王浆中提取王浆主蛋白(major royal jelly proteins,MRJPs),先就水料比、pH、离子强度3种单因素对MRJPs提取率的影响进行单因素分析,然后通过正交试验对MRJPs的超滤提取工艺进行优化,最后对MRJPs分离产物冻干粉和滤后...采用超滤方法从鲜王浆中提取王浆主蛋白(major royal jelly proteins,MRJPs),先就水料比、pH、离子强度3种单因素对MRJPs提取率的影响进行单因素分析,然后通过正交试验对MRJPs的超滤提取工艺进行优化,最后对MRJPs分离产物冻干粉和滤后液进行成分测定.结果表明:最佳提取工艺为水料体积质量比5:1(mL/g),pH 7.0,离子强度0.5 mol/L.在最佳工艺条件下,MRJPs的提取率为82.63%,冻干粉含可溶性蛋白91.00%、水分0.01%、总糖15.22%、王浆酸2.00%,超滤副产物——滤后液中王浆酸和总糖的回收率分别为3.60%和2.11%.超滤工艺具有无溶剂污染、王浆成分可回收利用,适合规模化生产的优点,为MRJPs分离提取提供了新的工艺方法,为王浆深加工和MRJPs蛋白产品开发提供了科学依据.展开更多
作为社会性昆虫,蜜蜂是研究社会行为和学习记忆的理想模式生物。王浆主蛋白(Major royal jelly protein,MRJP)是蜂王浆中蛋白质的主要成分,该家族一共有9个成员,MRJP1~MRJP9。所有mrjps均以串联排列的形式位于蜜蜂11号染色体上一个大约6...作为社会性昆虫,蜜蜂是研究社会行为和学习记忆的理想模式生物。王浆主蛋白(Major royal jelly protein,MRJP)是蜂王浆中蛋白质的主要成分,该家族一共有9个成员,MRJP1~MRJP9。所有mrjps均以串联排列的形式位于蜜蜂11号染色体上一个大约60 kb的DNA片段上。mrjp的同源体也存在于其他的膜翅目昆虫,均是通过yellow进化而来的。随着不断地进化,MRJPs家族进化出许多重要功能,其中最主要的就是营养功能。本文从MRJPs家族的基因及蛋白质结构、mRNA表达情况、进化和功能等方面进行综述,为今后开展相关研究提供理论支持。展开更多
基金supported by the Public Beneficial Scientific&Technical Plan of Zhejiang(No.2011C22039)the Important Scientific & Technical Plan of Zhejiang(No.2011C12023)+2 种基金the Important Scientific & Technical Innovation Project of Hangzhou(No.20131812A25)the Foundation of Fuli Institute of Food Science of Zhejiang University(No.KY201404)the National Natural Science Foundation of China(No.31271848)
文摘Major royal jelly protein 1（MRJP1）, designated apalbumin 1, has been regarded as a freshness marker of royal jelly（RJ）. A MRJP1-specific peptide（IKEALPHVPIFD） identified by bioinformatics analysis of homologous members of the major royal protein family was synthesized and used to raise polyclonal anti-MRJP1 antibody（antiSP-MRJP1 antibody）. Western blot analysis showed that anti-SP-MRJP1 antibody only reacted with MRJP1 in RJ. In contrast, the previously reported antibody against recombinant MRJP1（anti-R-MRJP1 antibody） reacted with other members of MRJP family in RJ. Enzyme-linked immunosorbent assay（ELISA） using anti-SP-MRJP1 antibody demonstrated that MRJP1 content in RJ stored at 40 °C significantly degraded by 37.3%, 55.9%, 58.0%, 60.6%, 65.7%, 72.7%, and 73.1% at 7, 14, 21, 28, 35, 42, and 49 d, respectively, when compared with MRJP1 content in fresh RJ（0 d）. Optical density analysis of MRJP bands from sodium dodecyl sulfate-polyacrylamide gel electrophoresis（SDS-PAGE） profiles demonstrated that the degradation of MRJP1, MRJP2, MRJP3, and MRJP5 in RJ was strongly and positively correlated with the period of storage（P〈0.0001）. Our results indicated anti-SP-MRJP1 antibody was highly specific for MRJP1, and ELISA using the antibody is a sensitive and easy-to-use method to determine the freshness and authenticity of RJ.
基金Project supported by the National Natural Science Foundation of China(No.31271848)the Important Scientific&Technical Innovation Project of Hangzhou(No.20131812A25)the Foundation of Fuli Institute of Food Science of Zhejiang University(No.KY201404),China
文摘Royal jelly （R J） is a well-known bioactive substance. It contains large amounts of major royal jelly proteins （MRJPs）, which express growth-factor-like activity in several animal and human cell lines. However, the question on whether MRJPs possess growth-factor-like activity on all types of cell cultures remains. In order to determine whether MRJPs can be used as an alternative to fetal bovine serum （FBS） in different types of human cell culture, the prolif- eration of the complex serum with different ratios of MRJPs/FBS （M/F） was evaluated on five cell lines： 293T, HFL-I, 231, HCT116, and Changliver using MTT （3-（4,5-dimethyl-2-thiazolyl）-2,5-diphenyl-2H-tetrazolium bromide） assay. The proliferation activity of the combination of the complex M/F serum with cytokines on the test cell lines was also measured. The results demonstrated that the complex serum with M/F 6/4 possessed the highest proliferation activity similar to or in excess of FBS. However, no activity of complex medium with M/F 6/4 was observed in 231 cells, indicating a selectivity of MRJPs on cell types. Compared with the complex medium with M/F 6/4, the complex medium with M/F 6/4 together with two cytokines, epidermal growth factor （EGF） and insulin-transferrin-selenium （ITS）, pro- moted proliferations of Changliver, 293T, HCT116, and H FL-I by 18.73%-56.19% （P〈0.01）. Our findings demonstrate that MRJPs could partially replace FBS in culturing many human cell lines.
文摘为建立精准的蜂王浆新鲜度检测方法,利用超高效液相色谱-串联四极杆飞行时间质谱(ultra-high performance liquid chromatography-tandem quadrupole-time-of-flight mass spectrometry,UPLC-Q-TOF/MS)对经胰蛋白酶酶解的蜂王浆中王浆主蛋白(major royal jelly proteins,MRJPs)进行定性分析,并通过蛋白质组学分析平台比对,鉴定出8种王浆主蛋白(MRJP1~7和MRJP9)的一级序列数据,然后按同时具备高易酶解性与酶解后高稳定性的标准筛选得到3个特异性标志多肽,包括MRJP1多肽YNGVPSSLNVISK、MRJP2多肽TLQMIAGMK、MRJP3多肽LTVAGESFTVK。分别合成MRJP1~3的3条特异性标志多肽标准品及其同位素标志肽,建立蜂王浆中MRJP1~3的超高效液相色谱-串联三重四极杆质谱(ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry,UPLC-TQMS)定量检测方法。采用UPLC-TQMS分别检测蜂王浆样品中MRJP1~3含量发现,MRJP1多肽在10~1 600 ng/mL范围内具有良好的线性关系,MRJP2和MRJP3多肽在10~600 ng/mL范围内均具有良好的线性关系,决定系数(R~2)均大于0.99。最后,通过分析蜂王浆中MRJP1~3随加温老化时间的降解程度,证实MRJP1~3的降解率均与老化时间(40℃)呈正相关(R~2>0.9)。说明本研究所建立的MRJP1~3检测方法具有高度特异性,可为蜂王浆质量评价提供技术支撑。
文摘作为社会性昆虫,蜜蜂是研究社会行为和学习记忆的理想模式生物。王浆主蛋白(Major royal jelly protein,MRJP)是蜂王浆中蛋白质的主要成分,该家族一共有9个成员,MRJP1~MRJP9。所有mrjps均以串联排列的形式位于蜜蜂11号染色体上一个大约60 kb的DNA片段上。mrjp的同源体也存在于其他的膜翅目昆虫,均是通过yellow进化而来的。随着不断地进化,MRJPs家族进化出许多重要功能,其中最主要的就是营养功能。本文从MRJPs家族的基因及蛋白质结构、mRNA表达情况、进化和功能等方面进行综述,为今后开展相关研究提供理论支持。
