Over the last years,cholangiocytes,the cells that line the biliary tree,have been considered an important object of study for their biological properties which involves bile formation,proliferation,injury repair,fibro...Over the last years,cholangiocytes,the cells that line the biliary tree,have been considered an important object of study for their biological properties which involves bile formation,proliferation,injury repair,fibrosis and angiogenesis.Cholangiocyte proliferation occurs in all pathologic conditions of liver injury where it is associated with inflammation and regeneration.During these processes,biliary cells start to secrete different cytokines,growth factors,neuropeptides and hormones which represent potential mechanisms for cross talk with other liver cells.Several studies suggest that hormones,and in particular,sex hormones,play a fundamental role in the modulation of the growth of this compartment in the injured liver which functionally conditions the progression of liver disease.Understanding the mechanisms of action and the intracellular pathways of these compounds on cholangiocyte pathophysiology will provide new potential strategies for the management of chronic liver diseases.The purpose of this review is to summarize the recent findings on the role of sex hormones in cholangiocyte proliferation and biology.展开更多
Histamine has long been known to be involved in inflammatory events.The discovery of antihistamines dates back to the first half of the 20th century when a Swiss-Italian pharmacologist,Daniel Bovet began his work.In 1...Histamine has long been known to be involved in inflammatory events.The discovery of antihistamines dates back to the first half of the 20th century when a Swiss-Italian pharmacologist,Daniel Bovet began his work.In 1957 he was awarded a Nobel Prize for his production of antihistamines for allergy relief.Since that time,histamine has been found to play a role in other events besides allergic reaction.Possiblyun believable to Bovet and his peers,histamine has now been marked as playing a role in liver pathologies including hepatobiliary diseases.展开更多
Anatomy of the thyroid has been extensively studied but the presence of pyramidal lobe varies in percentages from 15% to 75% of cases according to different authors. We therefore investigated systematically this pecul...Anatomy of the thyroid has been extensively studied but the presence of pyramidal lobe varies in percentages from 15% to 75% of cases according to different authors. We therefore investigated systematically this peculiar anatomical aspect. From January 2001 to December 2011, 1002 patients underwent total thyroidectomy in our Division of General Surgery. We analyzed the data collected on the latest 200 thyroidectomies: for all patients pyramidal lobe was measured at removal of the specimen then dimension of the pyramidal lobe after fixation was checked. We found the pyramidal lobe in all cases. In most cases, it was approximately 2 cm (range 1 - 8 cm on fresh specimen). At histology it was described in 72% of cases, after fixation size decreased by a third approximatively. This is the first systematic intraoperative study to verify the prevalence of the thyroid pyramidal lobe. In our experience, the pyramidal lobe is always present and the thyroglossal duct is identifiable.展开更多
基金MIUR grants PRIN, No.2003060498_002 and No. 2005067975_002 to Dr. Alvaro and by a grant award from Scott & White Hospital and The Texas A&M University System Health Science Center, a VA Merit Award, a VA Research Scholar Award and the NIH grants DK58411 and DK062975 to Dr. Alpini
基金MIUR grants PRIN 2005 (prot. 2005067975_001) to E. Gaudio and Biomedicina, Cluster C04, Progetto n. 5 to E.Gaudio-P.Onori MIUR grants PRIN 2005 (prot.No: 2005067975_002) to D. Alvaro and a VA Research Scholar Award, a VA Merit Award and the NIH grants DK58411 and DK062975 to Gianfranco Alpini
基金Supported partly by the University Federate Athenaeum Funds from University of Rome "La Sapienza" and PRIN 2007 to Gaudio EUniversity Funds to Onori P,the Dr.Nicholas C Hightower Centennial Chair of Gastroenterology from Scott and White+3 种基金the VA Research Scholar Awarda VA Merit Awardand the NIH Grants DK58411,and DK76898 to Dr.Alpinia NIH RO1 Grant Award to Dr.Glaser(DK081442)a NIH K01Grant Award(DK078532)to Dr.DeMorrow
文摘Over the last years,cholangiocytes,the cells that line the biliary tree,have been considered an important object of study for their biological properties which involves bile formation,proliferation,injury repair,fibrosis and angiogenesis.Cholangiocyte proliferation occurs in all pathologic conditions of liver injury where it is associated with inflammation and regeneration.During these processes,biliary cells start to secrete different cytokines,growth factors,neuropeptides and hormones which represent potential mechanisms for cross talk with other liver cells.Several studies suggest that hormones,and in particular,sex hormones,play a fundamental role in the modulation of the growth of this compartment in the injured liver which functionally conditions the progression of liver disease.Understanding the mechanisms of action and the intracellular pathways of these compounds on cholangiocyte pathophysiology will provide new potential strategies for the management of chronic liver diseases.The purpose of this review is to summarize the recent findings on the role of sex hormones in cholangiocyte proliferation and biology.
基金Supported partly by Dr.Nicholas C Hightower Centennial Chair of Gastroenterology from Scott and White,the VA Research Scholar Award,a VA Merit Award,the NIH Grants DK58411,and DK76898 to Dr.AlpiniUniversity funds to Dr.OnoriPRIN 2007 and Federate Athenaeum Funds from University of Rome "La Sapienza" to Professor Gaudio
文摘Histamine has long been known to be involved in inflammatory events.The discovery of antihistamines dates back to the first half of the 20th century when a Swiss-Italian pharmacologist,Daniel Bovet began his work.In 1957 he was awarded a Nobel Prize for his production of antihistamines for allergy relief.Since that time,histamine has been found to play a role in other events besides allergic reaction.Possiblyun believable to Bovet and his peers,histamine has now been marked as playing a role in liver pathologies including hepatobiliary diseases.
文摘Anatomy of the thyroid has been extensively studied but the presence of pyramidal lobe varies in percentages from 15% to 75% of cases according to different authors. We therefore investigated systematically this peculiar anatomical aspect. From January 2001 to December 2011, 1002 patients underwent total thyroidectomy in our Division of General Surgery. We analyzed the data collected on the latest 200 thyroidectomies: for all patients pyramidal lobe was measured at removal of the specimen then dimension of the pyramidal lobe after fixation was checked. We found the pyramidal lobe in all cases. In most cases, it was approximately 2 cm (range 1 - 8 cm on fresh specimen). At histology it was described in 72% of cases, after fixation size decreased by a third approximatively. This is the first systematic intraoperative study to verify the prevalence of the thyroid pyramidal lobe. In our experience, the pyramidal lobe is always present and the thyroglossal duct is identifiable.