测定自制的A nnex in V变体冻干品中的氯化亚锡含量。在酸性条件下,用钼酸钠-硫氰酸钾比色法测定,K=460nm。亚锡在5—50Lg内线性关系良好,低、中、高三浓度平均回收率分别为102.9%,99.9%,101.0%;RSD分别为6.4%,8.1%,5.1%(n=6)。用比色...测定自制的A nnex in V变体冻干品中的氯化亚锡含量。在酸性条件下,用钼酸钠-硫氰酸钾比色法测定,K=460nm。亚锡在5—50Lg内线性关系良好,低、中、高三浓度平均回收率分别为102.9%,99.9%,101.0%;RSD分别为6.4%,8.1%,5.1%(n=6)。用比色法测定A nnex in V变体冻干品中亚锡含量,方法简便、迅捷、试剂易得,可用于冻干品中氯化亚锡的质量控制。展开更多
While hallmarks of rodent spermatogonia stem cell biomarkers' heterogeneity have recently been identified, their stage and subset distributions remain unclear. Furthermore, it is currently difficult to accurately ...While hallmarks of rodent spermatogonia stem cell biomarkers' heterogeneity have recently been identified, their stage and subset distributions remain unclear. Furthermore, it is currently difficult to accurately identify subset-specific SSC marker distributions due to the poor nuclear morphological characteristics associated with fixation in 4% paraformaldehyde. In the present study, testicular cross-sections and whole-mount samples were Bouin fixed to optimize nuclear resolution and visualized by immunohistochemistry (IHC) and immunofluorescence (IF). The results identified an expression pattern of PLZFhighc-KITpos in A1 spermatogonia, while A2–A4-differentiating spermatogonia were PLZFlowc-KITpos. Additionally, this procedure was used to examine asymmetrically expressing GFRA1 and PLZF clones, asymmetric Apr and false clones were distinguished based on the presence or absence of TEX14, a molecular maker of intercellular bridges, despite having identical nuclear morphology and intercellular distances that were <25 μm. In conclusion, this optimized Bouin fixation procedure facilitates the accurate identification of spermatogonium subsets based on their molecular profiles and is capable of distinguishing asymmetric and false clones. Therefore, the findings presented herein will facilitate further morphological and functional analysis studies and provide further insight into spermatogonium subtypes.展开更多
文摘测定自制的A nnex in V变体冻干品中的氯化亚锡含量。在酸性条件下,用钼酸钠-硫氰酸钾比色法测定,K=460nm。亚锡在5—50Lg内线性关系良好,低、中、高三浓度平均回收率分别为102.9%,99.9%,101.0%;RSD分别为6.4%,8.1%,5.1%(n=6)。用比色法测定A nnex in V变体冻干品中亚锡含量,方法简便、迅捷、试剂易得,可用于冻干品中氯化亚锡的质量控制。
基金the grants from the National Key Research and Development Program of China (Project No. 2016YFC1000200)the National Natural Science Foundation of China (Project No. 31472054).
文摘While hallmarks of rodent spermatogonia stem cell biomarkers' heterogeneity have recently been identified, their stage and subset distributions remain unclear. Furthermore, it is currently difficult to accurately identify subset-specific SSC marker distributions due to the poor nuclear morphological characteristics associated with fixation in 4% paraformaldehyde. In the present study, testicular cross-sections and whole-mount samples were Bouin fixed to optimize nuclear resolution and visualized by immunohistochemistry (IHC) and immunofluorescence (IF). The results identified an expression pattern of PLZFhighc-KITpos in A1 spermatogonia, while A2–A4-differentiating spermatogonia were PLZFlowc-KITpos. Additionally, this procedure was used to examine asymmetrically expressing GFRA1 and PLZF clones, asymmetric Apr and false clones were distinguished based on the presence or absence of TEX14, a molecular maker of intercellular bridges, despite having identical nuclear morphology and intercellular distances that were <25 μm. In conclusion, this optimized Bouin fixation procedure facilitates the accurate identification of spermatogonium subsets based on their molecular profiles and is capable of distinguishing asymmetric and false clones. Therefore, the findings presented herein will facilitate further morphological and functional analysis studies and provide further insight into spermatogonium subtypes.
