A monolayer of endothelial cells (ECs) lines the lumen of blood vessels and forms a multifunctional transducing organ that mediates a plethora of cardiovascular processes. The activation of ECs from as state of quiesc...A monolayer of endothelial cells (ECs) lines the lumen of blood vessels and forms a multifunctional transducing organ that mediates a plethora of cardiovascular processes. The activation of ECs from as state of quiescence is, therefore, regarded among the early events leading to the onset and progression of potentially lethal diseases, such as hypertension, myocardial infarction, brain stroke, and tumor. Intracellular Ca2+ signals have long been know to play a central role in the complex network of signaling pathways regulating the endothelial functions. Notably, recent work has outlined how any change in the pattern of expression of endothelial channels, transporters and pumps involved in the modulation of intracellular Ca2+ levels may dramatically affect whole body homeostasis. Vascular ECs may react to both mechanical and chemical stimuli by generating a variety of intracellular Ca2+ signals, ranging from brief, localized Ca2+ pulses to prolonged Ca2+ oscillations engulfing the whole cytoplasm. The well-defined spatiotemporal profile of the subcellular Ca2+ signals elicited in ECs by specific extracellular inputs depends on the interaction between Ca2+ releasing channels, which arelocated both on the plasma membrane and in a number of intracellular organelles, and Ca2+ removing systems. The present article aims to summarize both the past and recent literature in the field to provide a clear-cut picture of our current knowledge on the molecular nature and the role played by the components of the Ca2+ machinery in vascular ECs under both physiological and pathological conditions.展开更多
In October 2012, a 29-year-old woman affected by chronic constipation underwent surgery for a laparoscopic total colectomy with ileal j-pouch-rectal anastomosis. After a precise instrumental work-up, the patient was s...In October 2012, a 29-year-old woman affected by chronic constipation underwent surgery for a laparoscopic total colectomy with ileal j-pouch-rectal anastomosis. After a precise instrumental work-up, the patient was selected as a potential candidate for the surgical treatment after failing to respond to all other medical treatment. During the first three months following the surgery, the patient recorded 3 - 4 daily evacuations of soft stool. After the third month, the number of evacuations stabilised at 2 -?3 a day, with formed stool, and no mention of incontinence or abdominal pain. Although the laparoscopic total colectomy with ileorectal anastomosis (TC with IRA) and the laparoscopically assisted subtotal colectomy with cecorectal anastomosis (SC with CRA) are the most frequently practiced procedures in the surgical treatment of chronic constipation, the laparoscopic colectomy with ileal j-pouch has shown in our experience to be a feasible and effective procedure, with similar results to the two aforementioned procedures in terms of morbidity, mortality and quality of life. In fact, like the first two, the total colectomy with ileal j-pouch has demonstrated the advantages of laparoscopic surgery: low invasiveness, less post-operative pain or ileus, respect of parietal integrity, reduced hospitalization and, lastly, a better cosmesis.展开更多
文摘A monolayer of endothelial cells (ECs) lines the lumen of blood vessels and forms a multifunctional transducing organ that mediates a plethora of cardiovascular processes. The activation of ECs from as state of quiescence is, therefore, regarded among the early events leading to the onset and progression of potentially lethal diseases, such as hypertension, myocardial infarction, brain stroke, and tumor. Intracellular Ca2+ signals have long been know to play a central role in the complex network of signaling pathways regulating the endothelial functions. Notably, recent work has outlined how any change in the pattern of expression of endothelial channels, transporters and pumps involved in the modulation of intracellular Ca2+ levels may dramatically affect whole body homeostasis. Vascular ECs may react to both mechanical and chemical stimuli by generating a variety of intracellular Ca2+ signals, ranging from brief, localized Ca2+ pulses to prolonged Ca2+ oscillations engulfing the whole cytoplasm. The well-defined spatiotemporal profile of the subcellular Ca2+ signals elicited in ECs by specific extracellular inputs depends on the interaction between Ca2+ releasing channels, which arelocated both on the plasma membrane and in a number of intracellular organelles, and Ca2+ removing systems. The present article aims to summarize both the past and recent literature in the field to provide a clear-cut picture of our current knowledge on the molecular nature and the role played by the components of the Ca2+ machinery in vascular ECs under both physiological and pathological conditions.
文摘In October 2012, a 29-year-old woman affected by chronic constipation underwent surgery for a laparoscopic total colectomy with ileal j-pouch-rectal anastomosis. After a precise instrumental work-up, the patient was selected as a potential candidate for the surgical treatment after failing to respond to all other medical treatment. During the first three months following the surgery, the patient recorded 3 - 4 daily evacuations of soft stool. After the third month, the number of evacuations stabilised at 2 -?3 a day, with formed stool, and no mention of incontinence or abdominal pain. Although the laparoscopic total colectomy with ileorectal anastomosis (TC with IRA) and the laparoscopically assisted subtotal colectomy with cecorectal anastomosis (SC with CRA) are the most frequently practiced procedures in the surgical treatment of chronic constipation, the laparoscopic colectomy with ileal j-pouch has shown in our experience to be a feasible and effective procedure, with similar results to the two aforementioned procedures in terms of morbidity, mortality and quality of life. In fact, like the first two, the total colectomy with ileal j-pouch has demonstrated the advantages of laparoscopic surgery: low invasiveness, less post-operative pain or ileus, respect of parietal integrity, reduced hospitalization and, lastly, a better cosmesis.
