胆囊小细胞型神经内分泌癌(gallbladder small cell neuroendocrine carcinoma,GB-SCNEC)是一种非常少见的高度恶性肿瘤,占胆囊所有恶性肿瘤的0.5%[1]。由于患者缺乏典型的临床特征,故容易漏诊误诊。本研究分析2例GB-SCNEC临床及病理资...胆囊小细胞型神经内分泌癌(gallbladder small cell neuroendocrine carcinoma,GB-SCNEC)是一种非常少见的高度恶性肿瘤,占胆囊所有恶性肿瘤的0.5%[1]。由于患者缺乏典型的临床特征,故容易漏诊误诊。本研究分析2例GB-SCNEC临床及病理资料,从而为今后的诊断和治疗提供参考依据。展开更多
Kinesins are microtubule-based motors involved in various intracellular transports. Neurons, flagellated cells, and pigment cells have been traditionally used as model systems to study the cellular functions of kinesi...Kinesins are microtubule-based motors involved in various intracellular transports. Neurons, flagellated cells, and pigment cells have been traditionally used as model systems to study the cellular functions of kinesins. Here, we report silkworm posterior silkgland （PSG）, specialized cells with an extensive endomembrane system for intracellular transport and efficient secretion of fibroin, as a novel model for kinesin study. To investigate kinesindriven intracellular transport in PSG cells, we cloned five silkworm kinesin-like proteins （KLPs）, BmKinesin-1, BmKinesin-6, BmKinesin-7, BmKinesin-13, and BmKinesin-14A. We determined their expression patterns by relative real-time PCR and western blotting. Immunofluorescence microscopy verified their colocalization with microtubules. By combining pull-down assays, LC-MS/MS, and western blotting analysis, we identified many potential cargoes of BmKinesin-1 in PSG, including fibroin-containing granules and exuperantia-associated ribonucleoprotein （RNP） complexes. Moreover, BmKinesin-13 overexpression disrupted the microtubule network in BmN cells, which is consistent with a role of Kinesin-13 in regulating microtubule dynamics in other organisms. On the basis of these results, we concluded that PSG might have advantages in elucidating mechanisms of intracellular transport in secretory tissues and could serve as a potential model for kinesin studies.展开更多
文摘胆囊小细胞型神经内分泌癌(gallbladder small cell neuroendocrine carcinoma,GB-SCNEC)是一种非常少见的高度恶性肿瘤,占胆囊所有恶性肿瘤的0.5%[1]。由于患者缺乏典型的临床特征,故容易漏诊误诊。本研究分析2例GB-SCNEC临床及病理资料,从而为今后的诊断和治疗提供参考依据。
基金Acknowledgments We wish to thank Prof GZ Zhang and Prof ZF Zhang at the Sericultural Research Institute of the Chinese Academy of Agricultural Sciences for B. mori strain and silkworm artificial diet, respectively. This work was supported by the National Natural Science Foundation of China （30670659, 30771086, 30721064）, the Major State Basic Research Development Program of China （973 Program） （2006CB500700, 2006CB910700, 2010CB833705）, and the National High Technology Research and Development Program of China （863 Program） （2006AA10A119）.
文摘Kinesins are microtubule-based motors involved in various intracellular transports. Neurons, flagellated cells, and pigment cells have been traditionally used as model systems to study the cellular functions of kinesins. Here, we report silkworm posterior silkgland （PSG）, specialized cells with an extensive endomembrane system for intracellular transport and efficient secretion of fibroin, as a novel model for kinesin study. To investigate kinesindriven intracellular transport in PSG cells, we cloned five silkworm kinesin-like proteins （KLPs）, BmKinesin-1, BmKinesin-6, BmKinesin-7, BmKinesin-13, and BmKinesin-14A. We determined their expression patterns by relative real-time PCR and western blotting. Immunofluorescence microscopy verified their colocalization with microtubules. By combining pull-down assays, LC-MS/MS, and western blotting analysis, we identified many potential cargoes of BmKinesin-1 in PSG, including fibroin-containing granules and exuperantia-associated ribonucleoprotein （RNP） complexes. Moreover, BmKinesin-13 overexpression disrupted the microtubule network in BmN cells, which is consistent with a role of Kinesin-13 in regulating microtubule dynamics in other organisms. On the basis of these results, we concluded that PSG might have advantages in elucidating mechanisms of intracellular transport in secretory tissues and could serve as a potential model for kinesin studies.
