Cancer is a multistep process encompassing the transformation of normal epithelial cells to the stromal invasion and metastasis, with these last considered the final stage of the disease. Tumor invasiveness is based o...Cancer is a multistep process encompassing the transformation of normal epithelial cells to the stromal invasion and metastasis, with these last considered the final stage of the disease. Tumor invasiveness is based on creation of a specific peri-tumoral environment which on turn depends upon epithelial-stromal interactions, degradation of extracellular matrix and reorganization of fibrillar components. Even though several aspects of the stromal and cellular remodeling have been elucidated and described, such as the epithelial-mesenchymal transition (EMT) and extracellular matrix degradation, all the underlying molecular mechanism are far to be elucidated in their complexity. In this review we focused on new actors such as microRNAs, G protein coupled receptor kinases (GRKs) and Calcium/calmodulin-dependent protein kinase (CaMKs) known to be involved in several important physiological processes like development, cell differentiation and cell signaling, and more recently linked to tumor progression and invasion.展开更多
Coronavirus disease-19(COVID-19)is caused by a severe acute respiratory syndrome coronavirus-2 and was declared a pandemic in March 2020.It mainly causes upper respiratory symptoms,but an interstitial viral pneumonia ...Coronavirus disease-19(COVID-19)is caused by a severe acute respiratory syndrome coronavirus-2 and was declared a pandemic in March 2020.It mainly causes upper respiratory symptoms,but an interstitial viral pneumonia may occur,in severe cases complicated by acute respiratory distress syndrome.Neurological involvement has been reported but has not been well investigated.A 75-year old man presenting with severe COVID-19 related pneumonia developed a severe cognitive impairment and a right temporal hemianopsia,with focal microangiopathy and subacute ischemic alterations detected on brain imaging,interpreted as vasculitic-inflammatory injury.The neurological disorder was diagnosed only after he was extubated.A rehabilitation program was set up,so the patient had a complete cognitive recovery.Our case underlines how COVID-19 can lead to severe neurological sequelae,so neurological examination should be promptly performed when patients display signs of nervous system involvement,in order to prevent further damages.展开更多
文摘Cancer is a multistep process encompassing the transformation of normal epithelial cells to the stromal invasion and metastasis, with these last considered the final stage of the disease. Tumor invasiveness is based on creation of a specific peri-tumoral environment which on turn depends upon epithelial-stromal interactions, degradation of extracellular matrix and reorganization of fibrillar components. Even though several aspects of the stromal and cellular remodeling have been elucidated and described, such as the epithelial-mesenchymal transition (EMT) and extracellular matrix degradation, all the underlying molecular mechanism are far to be elucidated in their complexity. In this review we focused on new actors such as microRNAs, G protein coupled receptor kinases (GRKs) and Calcium/calmodulin-dependent protein kinase (CaMKs) known to be involved in several important physiological processes like development, cell differentiation and cell signaling, and more recently linked to tumor progression and invasion.
文摘Coronavirus disease-19(COVID-19)is caused by a severe acute respiratory syndrome coronavirus-2 and was declared a pandemic in March 2020.It mainly causes upper respiratory symptoms,but an interstitial viral pneumonia may occur,in severe cases complicated by acute respiratory distress syndrome.Neurological involvement has been reported but has not been well investigated.A 75-year old man presenting with severe COVID-19 related pneumonia developed a severe cognitive impairment and a right temporal hemianopsia,with focal microangiopathy and subacute ischemic alterations detected on brain imaging,interpreted as vasculitic-inflammatory injury.The neurological disorder was diagnosed only after he was extubated.A rehabilitation program was set up,so the patient had a complete cognitive recovery.Our case underlines how COVID-19 can lead to severe neurological sequelae,so neurological examination should be promptly performed when patients display signs of nervous system involvement,in order to prevent further damages.
