D
Dr. Vad
⚪
Уважаемый Владимир Яковлевич!
Приношу свои извинения за неверно интерпретированное Ваше высказывание.
Действительно, мужчины-доноры отдают за раз крови столько, сколько иные сильно менструирующие женщины теряют за 3-4 мес. В среднем содержание неглобинового железа в организме оценивается примерно 1,0 г плюс повышение усвояемости Fе при скрытом дефиците, все это ведет к тому что сдавание 200-230 мг железа за сеанс донорства ведет к неуклонному возрастанию тканевого дефицита в организме (если не имеются наследственные мутации НFЕ [5-6% в популяции], приводящие к повышенному всасыванию Fе), но анемия проявляется значительно реже и позже. Быть может, ее появлению способствуют и др. факторы, напр. появление/наличие хеликобактера.
Helicobacter 2002 Apr;7(2):71-5
Helicobacter pylori-related iron deficiency anemia: a review.
Barabino A.
Pediatric Gastroenterology, G. Gaslini Institute, Genoa, Italy.
Several clinical reports have demonstrated that Helicobacter pylori gastric infection has emerged as a new cause of refractory iron deficiency anemia, unresponsive to iron therapy, and not attributable to usual causes such as intestinal losses or poor intake, malabsorption or diversion of iron in the reticulo-endothelial system. Although the interaction between infection and iron metabolism is now well consolidated, our understanding of the pathogenetic mechanism underlying the anemia is still wanting. Microbiological and ferrokinetic studies seem to suggest that Helicobacter pylori infected antrum could act as a sequestering focus for serum iron by means of outer membrane receptors of the bacterium, that in vitro are able to capture and utilize for growth iron from human lactoferrin. The proposed hypothesis does not answer why this complication is such a rare disease outcome in a common human infection but it may be used as a template for further controlled studies to determine the mechanisms of this atypical, medically important putative sequelae of H. pylori infection.
Gut 2003 Apr;52(4):496-501
Concomitant alterations in intragastric pH and ascorbic acid concentration in patients with Helicobacter pylori gastritis and associated iron deficiency anaemia.
Annibale B, Capurso G, Lahner E, Passi S, Ricci R, Maggio F, Delle Fave G.
Digestive and Liver Disease Unit, II Medical School, University La Sapienza, Roma, Italy. Cellular Ageing Centre, IDI, Roma, Italy.
BACKGROUND: Seroepidemiological and clinical studies suggest that Helicobacter pylori may cause iron deficiency anaemia (IDA) in the absence of peptic lesions by undefined mechanisms, which still remain to be fully elucidated. Gastric acidity and ascorbic acid (AA) promote iron absorption. AA is lowered in the presence of H pylori infection. H pylori can cause atrophic body gastritis with achlorhydria, decreased iron absorption, and consequent IDA. Whether alterations in intragastric acidity and AA concentrations play a role in IDA developing in patients with H pylori gastritis remains to be determined. Aim: To evaluate gastric juice pH and gastric juice and plasma AA in patients with H pylori infection and unexplained IDA, compared with controls with IDA and a healthy stomach or with controls with H pylori infection and no IDA. RESULTS: Patients with IDA and H pylori gastritis were characterised by concomitant increased intragastric pH (median value 7) and decreased intragastric AA (median value 4.4 micro g/ml) compared with controls with a healthy stomach (median pH 2; median intragastric AA 17.5 micro g/ml) and with H pylori positive controls without IDA (median pH 2.1; median intragastric AA 7.06 micro g/ml). Intragastric AA was inversely related to pH (r=-0.40, p=0.0059) and corporal degree of gastritis (r=-0.53, p=0.0039). Plasma AA concentrations were lower in all infected groups than in healthy controls. CONCLUSIONS: Patients with unexplained IDA and H pylori gastritis present concomitant changes in intragastric pH and AA that may justify impaired alimentary iron absorption and consequent IDA.
Приношу свои извинения за неверно интерпретированное Ваше высказывание.
Действительно, мужчины-доноры отдают за раз крови столько, сколько иные сильно менструирующие женщины теряют за 3-4 мес. В среднем содержание неглобинового железа в организме оценивается примерно 1,0 г плюс повышение усвояемости Fе при скрытом дефиците, все это ведет к тому что сдавание 200-230 мг железа за сеанс донорства ведет к неуклонному возрастанию тканевого дефицита в организме (если не имеются наследственные мутации НFЕ [5-6% в популяции], приводящие к повышенному всасыванию Fе), но анемия проявляется значительно реже и позже. Быть может, ее появлению способствуют и др. факторы, напр. появление/наличие хеликобактера.
Helicobacter 2002 Apr;7(2):71-5
Helicobacter pylori-related iron deficiency anemia: a review.
Barabino A.
Pediatric Gastroenterology, G. Gaslini Institute, Genoa, Italy.
Several clinical reports have demonstrated that Helicobacter pylori gastric infection has emerged as a new cause of refractory iron deficiency anemia, unresponsive to iron therapy, and not attributable to usual causes such as intestinal losses or poor intake, malabsorption or diversion of iron in the reticulo-endothelial system. Although the interaction between infection and iron metabolism is now well consolidated, our understanding of the pathogenetic mechanism underlying the anemia is still wanting. Microbiological and ferrokinetic studies seem to suggest that Helicobacter pylori infected antrum could act as a sequestering focus for serum iron by means of outer membrane receptors of the bacterium, that in vitro are able to capture and utilize for growth iron from human lactoferrin. The proposed hypothesis does not answer why this complication is such a rare disease outcome in a common human infection but it may be used as a template for further controlled studies to determine the mechanisms of this atypical, medically important putative sequelae of H. pylori infection.
Gut 2003 Apr;52(4):496-501
Concomitant alterations in intragastric pH and ascorbic acid concentration in patients with Helicobacter pylori gastritis and associated iron deficiency anaemia.
Annibale B, Capurso G, Lahner E, Passi S, Ricci R, Maggio F, Delle Fave G.
Digestive and Liver Disease Unit, II Medical School, University La Sapienza, Roma, Italy. Cellular Ageing Centre, IDI, Roma, Italy.
BACKGROUND: Seroepidemiological and clinical studies suggest that Helicobacter pylori may cause iron deficiency anaemia (IDA) in the absence of peptic lesions by undefined mechanisms, which still remain to be fully elucidated. Gastric acidity and ascorbic acid (AA) promote iron absorption. AA is lowered in the presence of H pylori infection. H pylori can cause atrophic body gastritis with achlorhydria, decreased iron absorption, and consequent IDA. Whether alterations in intragastric acidity and AA concentrations play a role in IDA developing in patients with H pylori gastritis remains to be determined. Aim: To evaluate gastric juice pH and gastric juice and plasma AA in patients with H pylori infection and unexplained IDA, compared with controls with IDA and a healthy stomach or with controls with H pylori infection and no IDA. RESULTS: Patients with IDA and H pylori gastritis were characterised by concomitant increased intragastric pH (median value 7) and decreased intragastric AA (median value 4.4 micro g/ml) compared with controls with a healthy stomach (median pH 2; median intragastric AA 17.5 micro g/ml) and with H pylori positive controls without IDA (median pH 2.1; median intragastric AA 7.06 micro g/ml). Intragastric AA was inversely related to pH (r=-0.40, p=0.0059) and corporal degree of gastritis (r=-0.53, p=0.0039). Plasma AA concentrations were lower in all infected groups than in healthy controls. CONCLUSIONS: Patients with unexplained IDA and H pylori gastritis present concomitant changes in intragastric pH and AA that may justify impaired alimentary iron absorption and consequent IDA.