试验旨在研究刺五加多糖(ASPS)对免疫抑制雏鸡脾脏中T淋巴细胞分布及免疫功能的影响,从而对ASPS的免疫增强作用进行评价。300只4日龄海兰褐公雏随机分为3组,每组100只:第1组为空白对照组,第2组为环磷酰胺(CTX)致免疫抑制组,第3组为ASPS+...试验旨在研究刺五加多糖(ASPS)对免疫抑制雏鸡脾脏中T淋巴细胞分布及免疫功能的影响,从而对ASPS的免疫增强作用进行评价。300只4日龄海兰褐公雏随机分为3组,每组100只:第1组为空白对照组,第2组为环磷酰胺(CTX)致免疫抑制组,第3组为ASPS+CTX组。第2组和第3组按照80 mg/kg·d的剂量皮下注射CTX,连续注射3 d。从10日龄开始,第3组每只鸡每天皮下注射0.2 m L 200 mg/m L的ASPS,连续注射3 d。第1组和第2组以同样方式注射等量灭菌生理盐水。注射后的第7、14、21和28天分别取脾脏,通过免疫组织化学染色和流式细胞术检测脾脏中CD4+、CD8+T淋巴细胞分布和数量变化,并利用荧光定量PCR方法检测脾脏中IFN-γ和IL-2 m RNA表达水平的变化。结果显示:CTX能够造成脾脏中CD4+和CD8+T淋巴细胞数量均显著减少(P<0.05),主要由CD4+细胞构成的PALS数量减少或消失,红髓和白髓中的CD4+和CD8+T淋巴细胞分布范围均减小,而且细胞排列疏松,IFN-γ和IL-2m RNA表达水平较空白对照组显著减少(P<0.05);在ASPS的作用下,ASPS+CTX组CD4+和CD8+T淋巴细胞的数量均比CTX组显著增加(P<0.05),PALS面积逐渐增加,而且结构逐渐完整清晰,CD8+T淋巴细胞的分布范围显著增加,红髓和白髓中CD8+细胞分布更加密集,免疫后28 d时基本恢复正常水平,IFN-γ和IL-2 m RNA表达水平显著提高(P<0.05)。结果表明,ASPS对CTX造成的脾脏中CD4+和CD8+T淋巴细胞定位分布和数量异常以及IFN-γ和IL-2 m RNA表达水平下降有显著的修复作用,证明ASPS对鸡脾脏免疫功能具有显著的增强作用。展开更多
Crystalline basement and Precambrian crustal growth of the continental massifs within the Central Asian Orogenic Belt(CAOB) are still pending problems. Our geological and geochemical investigations identified an Arche...Crystalline basement and Precambrian crustal growth of the continental massifs within the Central Asian Orogenic Belt(CAOB) are still pending problems. Our geological and geochemical investigations identified an Archean(2606 Ma) granitic pluton in the Biliya area of the Erguna Massif. The Neoarchean granitoids show high and positive in-situ zircon ε_(Ht)(t)(+0.3 to +10.0), whole-rock ε_(Nd)(t)(+4.8) and whole-rock ε_(Ht)(t) values(+2.1). They are characterized by high Y + Ce + Zr + Nb(> 220 ppm) and Zr contents and could be classified as A-type granites. These granitoids are characterized by high Zr saturation temperatures(T;)(796–836°C). They were derived from partial re-melting of juvenile mafic lower crust in an intracontinental back-arc extensional environment. This newly identified Neoarchean granitic pluton may represent the crystalline basement of the several continent massifs within the CAOB, and their high ε_(Ht)(t)–ε_(Nd)(t) values may also indicate the occurrence of lateral crustal growth events in these massifs during the Neoarchean.展开更多
文摘试验旨在研究刺五加多糖(ASPS)对免疫抑制雏鸡脾脏中T淋巴细胞分布及免疫功能的影响,从而对ASPS的免疫增强作用进行评价。300只4日龄海兰褐公雏随机分为3组,每组100只:第1组为空白对照组,第2组为环磷酰胺(CTX)致免疫抑制组,第3组为ASPS+CTX组。第2组和第3组按照80 mg/kg·d的剂量皮下注射CTX,连续注射3 d。从10日龄开始,第3组每只鸡每天皮下注射0.2 m L 200 mg/m L的ASPS,连续注射3 d。第1组和第2组以同样方式注射等量灭菌生理盐水。注射后的第7、14、21和28天分别取脾脏,通过免疫组织化学染色和流式细胞术检测脾脏中CD4+、CD8+T淋巴细胞分布和数量变化,并利用荧光定量PCR方法检测脾脏中IFN-γ和IL-2 m RNA表达水平的变化。结果显示:CTX能够造成脾脏中CD4+和CD8+T淋巴细胞数量均显著减少(P<0.05),主要由CD4+细胞构成的PALS数量减少或消失,红髓和白髓中的CD4+和CD8+T淋巴细胞分布范围均减小,而且细胞排列疏松,IFN-γ和IL-2m RNA表达水平较空白对照组显著减少(P<0.05);在ASPS的作用下,ASPS+CTX组CD4+和CD8+T淋巴细胞的数量均比CTX组显著增加(P<0.05),PALS面积逐渐增加,而且结构逐渐完整清晰,CD8+T淋巴细胞的分布范围显著增加,红髓和白髓中CD8+细胞分布更加密集,免疫后28 d时基本恢复正常水平,IFN-γ和IL-2 m RNA表达水平显著提高(P<0.05)。结果表明,ASPS对CTX造成的脾脏中CD4+和CD8+T淋巴细胞定位分布和数量异常以及IFN-γ和IL-2 m RNA表达水平下降有显著的修复作用,证明ASPS对鸡脾脏免疫功能具有显著的增强作用。
基金financially supported by Geological Survey projects of China Geological Survey (DD20160047 and 12120115031301)。
文摘Crystalline basement and Precambrian crustal growth of the continental massifs within the Central Asian Orogenic Belt(CAOB) are still pending problems. Our geological and geochemical investigations identified an Archean(2606 Ma) granitic pluton in the Biliya area of the Erguna Massif. The Neoarchean granitoids show high and positive in-situ zircon ε_(Ht)(t)(+0.3 to +10.0), whole-rock ε_(Nd)(t)(+4.8) and whole-rock ε_(Ht)(t) values(+2.1). They are characterized by high Y + Ce + Zr + Nb(> 220 ppm) and Zr contents and could be classified as A-type granites. These granitoids are characterized by high Zr saturation temperatures(T;)(796–836°C). They were derived from partial re-melting of juvenile mafic lower crust in an intracontinental back-arc extensional environment. This newly identified Neoarchean granitic pluton may represent the crystalline basement of the several continent massifs within the CAOB, and their high ε_(Ht)(t)–ε_(Nd)(t) values may also indicate the occurrence of lateral crustal growth events in these massifs during the Neoarchean.