Bone metastasis is a common and debilitating consequence of lung cancer:30%-40% of patients with nonsmall cell lung cancer develop bone metastases during the course of their disease. Lung cancer cells find a favorable...Bone metastasis is a common and debilitating consequence of lung cancer:30%-40% of patients with nonsmall cell lung cancer develop bone metastases during the course of their disease. Lung cancer cells find a favorable soil in the bone microenvironment due to factors released by the bone matrix, the immune system cells, and the same cancer cells. Many aspects of the cross-talk among lung tumor cells, the immune system,and bone cells are not clear, but this review aims to summarize the recent findings in this field, with particular attention to studies conducted to identify biomarkers for early detection of lung cancer bone metastases.展开更多
Osteoclast-like giant cell tumors （OGCT） are rare abdominal tumors, which mainly occur in the pancreas. The neoplasms are composed of two distinct cell populations and frequently show an inhomogenous appearance with...Osteoclast-like giant cell tumors （OGCT） are rare abdominal tumors, which mainly occur in the pancreas. The neoplasms are composed of two distinct cell populations and frequently show an inhomogenous appearance with cystic structures. However, due to the rarity of these tumors, only very limited clinical data are available. Imaging features and sonographic appearance have hardly been characterized. Here we report on two cases of osteoclast-like giant cell tumors, one located within the pancreas, the other within the liver, in which OGCTs are extremely rare. Both patients were investigated by contrast sonography, which demonstrated a complex, partly cystic and strongly vascularized tumor within the head of the pancreas in the first patient and a large, hypervascularized neoplasm with calcifications within the liver in the second patient. The liver OGCT responded well to a combination of carboplatin, etoposide and paclitaxel. With a combination of surgical resection, radiofrequency ablation and chemotherapy, the patient＇s survival is currently more than 15 too, making him the longest survivor with an OGCT of the liver to date.展开更多
背景:机械敏感通道蛋白Piezo1是机械应力刺激的重要靶蛋白,能将物理的机械力转化成生物电信号,从而调控骨形成与骨吸收,在抗骨质疏松中发挥着重要作用。目的:总结机械应力刺激在抗骨质疏松中的作用机制、Piezo1分子生物学研究进程及Pie...背景:机械敏感通道蛋白Piezo1是机械应力刺激的重要靶蛋白,能将物理的机械力转化成生物电信号,从而调控骨形成与骨吸收,在抗骨质疏松中发挥着重要作用。目的:总结机械应力刺激在抗骨质疏松中的作用机制、Piezo1分子生物学研究进程及Piezo1在骨质疏松中的研究进展。方法:使用计算机在中国知网、万方、维普、PubMed及Web of Science数据库进行文献检索,中文检索词为“骨质疏松、Piezo1、机械应力、骨”,英文检索词为“osteoporosis,Piezo1,mechanical,osteoblast,osteoclast,chondrocyte,bone”,根据纳排标准对文献进行筛选,最终纳入65篇文献进行综述。结果与结论:①机械敏感通道蛋白Piezo1的蛋白结构在冷冻电镜技术突破中不断得到新的解析,目前研究表明Piezo1蛋白基于三叶螺旋桨状三维构造主体,在静默和应激状态下可表现出不同的结构变化;②Piezo1介导的机械应力刺激能通过调控成骨细胞、软骨细胞、内皮细胞、肠道细胞的功能影响骨形成,同时调控破骨细胞的功能影响骨吸收,进而在抗骨质疏松中发挥重要作用;③Piezo1介导的机械应力刺激主要通过Wnt/β-catenin信号通路调控成骨细胞功能影响骨形成;而其对破骨细胞功能的调节,因机械力的类型、大小、作用时间的不同而对骨吸收有双向调节作用,需进一步量化的研究;④未来基于Piezo1在骨质疏松中的临床研究、骨质疏松动物模型研究、破骨细胞的相关机制及新型复合材料研究仍需更多的关注。展开更多
基金Supported by Italian Ministry of Health:Ricerca Sanitaria Finalizzata e Giovani Ricercatori 2009,No.GR 2009-1584485
文摘Bone metastasis is a common and debilitating consequence of lung cancer:30%-40% of patients with nonsmall cell lung cancer develop bone metastases during the course of their disease. Lung cancer cells find a favorable soil in the bone microenvironment due to factors released by the bone matrix, the immune system cells, and the same cancer cells. Many aspects of the cross-talk among lung tumor cells, the immune system,and bone cells are not clear, but this review aims to summarize the recent findings in this field, with particular attention to studies conducted to identify biomarkers for early detection of lung cancer bone metastases.
文摘Osteoclast-like giant cell tumors （OGCT） are rare abdominal tumors, which mainly occur in the pancreas. The neoplasms are composed of two distinct cell populations and frequently show an inhomogenous appearance with cystic structures. However, due to the rarity of these tumors, only very limited clinical data are available. Imaging features and sonographic appearance have hardly been characterized. Here we report on two cases of osteoclast-like giant cell tumors, one located within the pancreas, the other within the liver, in which OGCTs are extremely rare. Both patients were investigated by contrast sonography, which demonstrated a complex, partly cystic and strongly vascularized tumor within the head of the pancreas in the first patient and a large, hypervascularized neoplasm with calcifications within the liver in the second patient. The liver OGCT responded well to a combination of carboplatin, etoposide and paclitaxel. With a combination of surgical resection, radiofrequency ablation and chemotherapy, the patient＇s survival is currently more than 15 too, making him the longest survivor with an OGCT of the liver to date.
文摘背景:机械敏感通道蛋白Piezo1是机械应力刺激的重要靶蛋白,能将物理的机械力转化成生物电信号,从而调控骨形成与骨吸收,在抗骨质疏松中发挥着重要作用。目的:总结机械应力刺激在抗骨质疏松中的作用机制、Piezo1分子生物学研究进程及Piezo1在骨质疏松中的研究进展。方法:使用计算机在中国知网、万方、维普、PubMed及Web of Science数据库进行文献检索,中文检索词为“骨质疏松、Piezo1、机械应力、骨”,英文检索词为“osteoporosis,Piezo1,mechanical,osteoblast,osteoclast,chondrocyte,bone”,根据纳排标准对文献进行筛选,最终纳入65篇文献进行综述。结果与结论:①机械敏感通道蛋白Piezo1的蛋白结构在冷冻电镜技术突破中不断得到新的解析,目前研究表明Piezo1蛋白基于三叶螺旋桨状三维构造主体,在静默和应激状态下可表现出不同的结构变化;②Piezo1介导的机械应力刺激能通过调控成骨细胞、软骨细胞、内皮细胞、肠道细胞的功能影响骨形成,同时调控破骨细胞的功能影响骨吸收,进而在抗骨质疏松中发挥重要作用;③Piezo1介导的机械应力刺激主要通过Wnt/β-catenin信号通路调控成骨细胞功能影响骨形成;而其对破骨细胞功能的调节,因机械力的类型、大小、作用时间的不同而对骨吸收有双向调节作用,需进一步量化的研究;④未来基于Piezo1在骨质疏松中的临床研究、骨质疏松动物模型研究、破骨细胞的相关机制及新型复合材料研究仍需更多的关注。
