RESUMO
The authors present complex surgical treatment of a patient with rheumatoid arthritis and persistent wound in the right gluteal region after previous surgical treatment of post-injection abscess. According to these data, active surgical treatment of wounds and purulent-necrotic lesions of any etiology and localization, augmented by modern agents for local and systemic therapy (including phage therapy) provide favorable functional and cosmetic results even in patients with systemic autoimmune diseases receiving glucocorticosteroids. It is important to assess the wound process considering not only clinical data, but also objective information of qualitative and quantitative microbiological and cytological examinations.
Assuntos
Abscesso , Doenças Autoimunes , Humanos , Abscesso/diagnóstico , Abscesso/etiologia , Abscesso/cirurgia , Doenças Autoimunes/complicações , Doenças Autoimunes/diagnósticoRESUMO
OBJECTIVE: To report own experience in the treatment of patients with proinsulinoma. MATERIAL AND METHODS: There were 10 patients with increased proinsulin production and normal insulin level since 2017. Most of them were young women. RESULTS: Fasting hypoglycemia in all patients was severe (up to 0.7 mmol/l). Clinical picture consisted of typical symptoms similar to those in insulinoma. The main difference in the course of proinsulinoma was the absence of weight gain in 7 patients and rapid weight loss (from 210 to 90 kg within 9 months) in 1 patient. All patients with proinsulinoma underwent surgery. In most cases, minimally aggressive surgery was performed. CONCLUSION: Proinsulinoma is an extremely rare endocrine-active neuroendocrine pancreatic tumor. Differential features of proinsulinoma are the absence of weight gain and normal insulin levels in the presence of hypoglycemia. Surgery is the only radical method of treatment.
Assuntos
Insulinoma , Neoplasias Pancreáticas , Proinsulina/biossíntese , Feminino , Humanos , Hipoglicemia/etiologia , Insulina/análise , Insulinoma/complicações , Insulinoma/diagnóstico , Insulinoma/metabolismo , Insulinoma/cirurgia , Masculino , Pâncreas/metabolismo , Pâncreas/patologia , Pâncreas/cirurgia , Neoplasias Pancreáticas/complicações , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/metabolismo , Neoplasias Pancreáticas/cirurgiaRESUMO
AIM: To evaluate dynamics of presepsin, procalcitonin and C-reactive protein in survived and dead patients with sepsis. MATERIAL AND METHODS: There were 41 patients with diagnosis of 'sepsis' ('Sepsis-3' concept) who were divided into 2 groups: survived patients with sepsis (21 people) - group 1, dead patients with sepsis (20 people) - group 2. All patients underwent generally accepted intensive therapy for sepsis. Besides conventional laboratory and instrumental examination, dynamics of presepsin, procalcitonin and C-reactive protein was assessed. RESULTS: Mean level of presepsin was 1718.00 and 3266.50 pg/ml in groups 1 and group 2, respectively. Half of the values was within (Me (25; 75) 1021.00-3231.00 pg/ml and 1618.50-7469.00 pg/ml in both groups, respectively. Mean level of procalcitonin was 0.995 and 4.465 ng/ml, respectively. Median (25; 75) was 0.49-4.44 ng/ml and 1,625-19.30 ng/ml, respectively. Mean level of C-reactive protein was 95.5 and 215.0 mg/L, respectively, median (25; 75) - 64.00-155.00 mg/L and 155.00-264.00 mg/L, respectively. Significant differences were determined for all variables (p-value 0.000008, 0.000242, 0.0000001 for presepsin, procalcitonin and C-reactive protein, respectively). CONCLUSION: The levels of C-reactive protein, procalcitonin and presepsin were significantly different in patients with sepsis followed by favorable and unfavorable clinical outcome. Unfavorable outcome was associated with increased levels of all biomarkers. Comprehensive assessment of all biological markers of sepsis is useful to assess an effectiveness of intensive therapy and to predict clinical outcome.
Assuntos
Proteína C-Reativa/análise , Receptores de Lipopolissacarídeos/sangue , Fragmentos de Peptídeos/sangue , Pró-Calcitonina/sangue , Sepse/sangue , Biomarcadores/análise , Biomarcadores/sangue , Cuidados Críticos , Humanos , Valor Preditivo dos Testes , Prognóstico , Sepse/mortalidade , Sepse/terapia , Resultado do TratamentoRESUMO
AIM: To optimize diagnostics and treatment of cystic liver tumors. MATERIAL AND METHODS: The analysis included outcomes of 46 patients with liver cystic tumors. RESULTS AND DISCUSSION: The use of abdominal Doppler-sonography (37 patients), abdominal contrast-enhanced CT (44 patients) and MRI of abdominal cavity with MR-cholangiography (24 patients) defined radiological semiotics of cystic liver diseases. The most important features of cystic tumors are intraluminal septums with blood flow (82% of patients), solid component (6.8%), daughterly cysts (11.3%), as well as biliary hypertension (39.2% of patients). Research of oncomarkers (CEA, SA 19-9, AFP) in 40 patients showed increased level of SA 19-9 only in case of cystadenocarcinoma and intraductal papillary mucinous neoplasm of biliary type. Benign and malignant cystic tumors had increased contents of oncomarkers in all cases. Surgical treatment was used in 42 patients. Extended liver resections were performed in 10 (23.8%) patients, atypical and anatomical resections (removal of less than 3 segments) - in 31 (73.8%) patients. In one case we applied cryoablation of CA in segment I of the liver in view of invasion into the wall of inferior vena cava and hepatoduodenal ligament. In 2 cases surgery was carried out laparoscopically. Also robot-assisted technique was used in 3 patients. Immunohistochemical study was performed in 22 (44.8%) patients. The diagnosis of CAC and biliary type of IPMN was confirmed in case of high expression of CK7, SK19, MUC1, S100p, SDH2, p53 antibodies. Cystadenomas were associated with moderate expression of ER, PR and p53 antibodies by stroma and CK7, SK19, CDX2, MUC1, S100p antibodies by epithelium. CONCLUSION: There are considerable difficulties of differential diagnosis of liver cystic tumors. Therefore, the use of single algorithm of diagnostics and treatment is necessary to confirm accurately the diagnosis at the perioperative stage. Cystic tumor is more likely to be assumed in women with solitary cyst in segment IV of liver. If the diagnosis is suspected or confirmed anatomical liver resection with complete tumor removal is necessary to prevent the recurrence.
Assuntos
Cistadenocarcinoma Mucinoso , Cistadenoma Mucinoso , Hepatectomia , Neoplasias Hepáticas , Fígado , Recidiva Local de Neoplasia/prevenção & controle , Adulto , Biomarcadores Tumorais/sangue , Cistadenocarcinoma Mucinoso/sangue , Cistadenocarcinoma Mucinoso/diagnóstico , Cistadenocarcinoma Mucinoso/patologia , Cistadenocarcinoma Mucinoso/cirurgia , Cistadenoma Mucinoso/sangue , Cistadenoma Mucinoso/diagnóstico , Cistadenoma Mucinoso/patologia , Cistadenoma Mucinoso/cirurgia , Diagnóstico Diferencial , Feminino , Hepatectomia/efeitos adversos , Hepatectomia/métodos , Humanos , Fígado/diagnóstico por imagem , Fígado/patologia , Neoplasias Hepáticas/sangue , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/cirurgia , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Avaliação de Processos e Resultados em Cuidados de Saúde , Tomografia Computadorizada por Raios X/métodos , Ultrassonografia Doppler/métodosRESUMO
56 Patients with cancer of major duodenal papilla were examined before and after pylorus-saving pancreaticoduodenal resection. Carbohydrate metabolism was estimated before and after the operation, impact of the operation on diabetes mellitus progression was detected. If there were no carbohydrate metabolism abnormalities in 75% before the operation, then there were 55% of such patients after the operation. After the pylorus-saving pancreaticoduodenal resection the impaired glucose tolerance was detected in 4 (7%) of patients whose carbohydrate metabolism had corresponded to norms before the operation. 7 (13%) of 17 (31%) patients had diabetes mellitus of mild severity after the pylorus-saving pancreaticoduodenal resection, the rest 10 (18%) had diabetes mellitus of moderate severity. In 7 (13%) patients after the pylorus-saving pancreaticoduodenal resection the diabetes mellitus of moderate severity was detected for the first time, at that in 4 patients diabetes mellitus of mild severity was detected, and in 3 patients--diabetes mellitus of moderate severity (everyone received insulin therapy in the long-term postoperative period) was detected. Checking protocol of the patients' carbohydrate metabolism in the perioperative period was described in detail. The possibility of prognostication of carbohydrate metabolism abnormalities in the long-term postoperative period by indications of carbohydrate metabolism before the operation and in early postoperative period was studied. Middle blood glucose level in early postoperative period is an informative indication for prognostication of carbohydrate metabolism state in the long-term postoperative period. An algorithm of patients' examination with cancer of major duodenal papilla before the operation and after it was offered; also checking protocol of carbohydrate metabolism indices and correction of the detected abnormalities in the early postoperative period were offered.
Assuntos
Metabolismo dos Carboidratos , Neoplasias do Ducto Colédoco/metabolismo , Neoplasias do Ducto Colédoco/cirurgia , Diabetes Mellitus/etiologia , Adulto , Idoso , Glicemia/análise , Neoplasias do Ducto Colédoco/complicações , Diabetes Mellitus/tratamento farmacológico , Diabetes Mellitus/metabolismo , Feminino , Teste de Tolerância a Glucose , Humanos , Insulina/uso terapêutico , Masculino , Pessoa de Meia-Idade , Pancreaticoduodenectomia , Período Pós-OperatórioRESUMO
Interdependence between the level of homocysteine and acute-phase proteins was assessed in patients presenting with a severe course of atherosclerosis. We examined a total of 67 patients aged 62.3 +/- 1.03 years. Of these, 34 patients had type 2 diabetes mellitus and 35 were non-diabetic. The diabetic patients were found to suffer a severe course of the disease, with 65.6% having a decompensated form. We carried out a comparative analysis of the level of homocysteine, C-reactive protein, and that of fibrinogen. It was noted that diabetic patients significantly more often showed high levels of blood-plasma total homocysteine, C-reactive protein, and that of fibrinogen as compared to nondiabetic patients. Hyperhomocysteinemia appeared to correlate with elevated levels of C-reactive protein (r = 0.37, p = 0.04) and that of fibrinogen (r = 0.36, p = 0.04) at HbA1c > or = 7%. The obtained findings strongly suggest interrelationship of high levels of blood-plasma homocysteine and an elevation in acute-phase proteins in a decompensated form of diabetes mellitus and the presence of sluggish chronic inflammation in all patients, either with or without diabetes mellitus. Inclusion of homocysteine measuring and a highly sensitive method for determining C-reactive protein into the standard of examining patients with atherosclerosis improves diagnosis of the pathological condition, while timely correction of the impairments revealed promotes a decrease in the risk of the development of complications.
Assuntos
Aterosclerose , Proteína C-Reativa/análise , Diabetes Mellitus Tipo 2 , Hiper-Homocisteinemia , Complicações Pós-Operatórias , Aterosclerose/sangue , Aterosclerose/diagnóstico , Aterosclerose/etiologia , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/diagnóstico , Progressão da Doença , Feminino , Fibrinogênio/análise , Hemoglobinas Glicadas/análise , Homocisteína/sangue , Humanos , Hiper-Homocisteinemia/sangue , Hiper-Homocisteinemia/etiologia , Inflamação/sangue , Inflamação/etiologia , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/sangue , Complicações Pós-Operatórias/diagnóstico , Medição de Risco , Índice de Gravidade de Doença , Estatística como Assunto , Procedimentos Cirúrgicos Vasculares/efeitos adversosRESUMO
The carbohydrate metabolism was analyzed in 70 patients with the complicated chronic pancreatitis before and after pylorus-preserving pancreatoduodenal resection (PPDR). Patients were aged 42±1,15 years, of them 64 were men and 6 - women. Bodymass index was 2,2±0,54kg/m2. Patients were divided in groups according to pre- and postoperative glucose metabolism disorders to define the diabetes morbidity by chronic pancreatitis and the influence of surgery on the first. According to the preoperative data, diabetes mellitus of mild severity had 9 of 70 operated patients, 18 patients had medium diabetes. After the operation only one patient demonstrated the aggravation of diabetes. However, the onset of diabetes mellitus was registered in 8 patients postoperatively. The increased glucose blood level in early postoperative period proved to have a high prognostic significance. Therefore, all patients of that category must be strongly recommended to be under the endocrinologist's observation after hospital discharge. That measure would provide a timely diagnose and treatment of the diabetes mellitus. All patients with chronic pancreatitis should be thoroughly investigated concerning glucose metabolism disorders before the operation.
Assuntos
Glicemia/metabolismo , Transtornos do Metabolismo de Glucose/etiologia , Pancreaticoduodenectomia , Pancreatite Crônica/sangue , Adulto , Biomarcadores/sangue , Índice de Massa Corporal , Carboidratos/sangue , Progressão da Doença , Feminino , Seguimentos , Transtornos do Metabolismo de Glucose/sangue , Humanos , Masculino , Pancreatite Crônica/complicações , Pancreatite Crônica/cirurgia , Período Pós-Operatório , PrognósticoRESUMO
Carbohydrate metabolism was explored in 52 patients with cancer of the head of pancreas before and after pylorus-preserving pancreatoduodenal resection. Glycemia, insulin dosage, glucosuria and acetonuria were assessed retrospectively to reveal correlation with postoperative carbohydrate metabolism disturbances. Preoperatively 46.2% of patients had no metabolic problems, whereas postoperatively only 38.5% of patients showed normal sugar metabolism. 9 (17.3%) patients developed disturbed glucose tolerance, 5 (9.6%) patients developed mild diabetes mellitus and 18 (34.6%) patients had diabetes of medium severity. Combination of first diagnosed diabetes mellitus, progressive weight loss and abdominal pain proved to be the negative prognostic set of symptoms and should urge on pancreatic tumor search. Glucose level in early postoperative period is a valuable prognostic criteria for the development of carbohydrate metabolism disturbances in long-term postoperative period.
Assuntos
Transtornos do Metabolismo de Glucose/etiologia , Pancreaticoduodenectomia/efeitos adversos , Complicações Pós-Operatórias/etiologia , Acetona/urina , Glicemia/análise , Metabolismo dos Carboidratos , Diabetes Mellitus/diagnóstico , Diabetes Mellitus/etiologia , Feminino , Transtornos do Metabolismo de Glucose/diagnóstico , Índice Glicêmico , Humanos , Insulina/administração & dosagem , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas , Complicações Pós-Operatórias/diagnóstico , PrognósticoRESUMO
Efficacy of out-hospital treatment of coagulation disorders in patients with diabetes mellitus type II (DMII) in comparison with non-diabetic patients after aortic-femoral reconstruction was studied. Long-term results were obtained within 65,1±3,95 months after surgery. Data of 67 patients were obtained, of them 32 had severe DMII, 35 patients had no diabetic disorders. 94% of patients had various hypercoagulation disorders and thrombophilia stage I-II. Desagregant therapy was noneffective in 70,1% of patients. Patients with atherosclerosis after reconstructive vascular surgery showed disorders of both thrombocytic and plasma links of coagulation, which requires combined (anticoagulant and desagregant) therapy. Patients with DMII require also blood glucose and HbA1c control postoperatively.
Assuntos
Angioplastia , Anticoagulantes/uso terapêutico , Aorta/cirurgia , Diabetes Mellitus Tipo 2/sangue , Artéria Femoral/cirurgia , Complicações Pós-Operatórias/tratamento farmacológico , Trombofilia/tratamento farmacológico , Coagulação Sanguínea , Plaquetas/efeitos dos fármacos , Feminino , Hemoglobinas Glicadas/análise , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
The authors carried out a comparative analysis of the level of homocysteine and the state of haemostasis in patients with and without type 2 diabetes mellitus in the remote terms after endured reconstructive operations on the aorto-iliac segment. They examined a total of eighty-eight patients who had endured reconstructive operations on the aorto-iliac segment at various terms. Of these, forty-two patients were found to have a severe course of type 2 diabetes mellitus (59.9% with decompensation) and forty-six subjects without diabetes constituted the group of comparison. The average age of the patients amounted to 61.9 +/- 1.25 years, with all being smokers. The following parameters were assessed: patency of the bypasses and major arteries of the lower limbs (LL), homocysteine (Hey), fibrinolytic activity, fibrinogen, activated partial thromboplastin time (aPTT), factor XIII, thrombin time, prothrombin index, activity of antithrombin III (AIII), platelet aggregation with ADP, and glycosylated haemoglobin (Hb Aic).
Assuntos
Aorta Abdominal/cirurgia , Implante de Prótese Vascular , Diabetes Mellitus Tipo 2/sangue , Hemostasia , Homocisteína/sangue , Artéria Ilíaca/cirurgia , Perna (Membro)/irrigação sanguínea , Idoso , Antitrombina III/análise , Interpretação Estatística de Dados , Diabetes Mellitus Tipo 2/complicações , Feminino , Fibrinogênio/análise , Seguimentos , Humanos , Perna (Membro)/cirurgia , Masculino , Pessoa de Meia-Idade , Agregação Plaquetária , Complicações Pós-Operatórias , Procedimentos de Cirurgia Plástica , Tromboplastina/análise , Fatores de TempoRESUMO
The article is dedicated to assessment of quality of ambulatory management of patients suffering from type 2 diabetes mellitus in remote terms following reconstructive operations on the aortoiliac segment. The aspects investigated included the frequency of the of patients' visiting the district polyclinic, as well as frequency and quality of planned examinations and conservative treatment. Presented herein are the results of questioning and comprehensive examination of fifty-six patients suffering from type 2 diabetes mellitus (mean age 62.3 +/- 1. 7years) performed averagely 61.9 +/- 2.1 months after surgical treatment. Fifty percent of these patients appeared to have prior to the operation had critical ischaemia of the lower extremities. By the time of the check up examination, 62.5% of these preserved stage 1 or 2A ischaemia and 37.5% had stage 2B ischaemia, which on the whole was indicative of a long-term positive outcome of surgical interventions in this severely ill cohort of patients. During this time period, in 23 (41.1%) patients with baseline critical ischaemia it turned out possible to avoid limb amputation, and 62.5% were found to have considerably increased the distance of pain-free walking (stage 1 or 2A). Together with it, the obtained findings suggested virtually total lack of adequate angiological care for the postoperative patients at the ambulatory-polyclinic level. First of all, there are neither correctly organized dispensary follow up of patients nor continuity between the clinical hospital and the polyclinic. Analysing the check-up clinical evidence showed that 83.9% of patients required correction of blood glucose level, 96.4% that of lipid profile, and 73.2% that of the haemocoagulation system. Twenty-five (44.6%) patients required stagewise reconstructions due to an atherosclerotic lesion of the previously intact arteries of the lower limbs (21), prosthesis-leg thrombosis (1) and anastomotic restenosis (3). Hence, the clinical effect of a clinical intervention in diabetic patients is apparently evident. Correct and adequate organization of therapeutic and preventive care at the ambulatory and polyclinic level may substantially improve the remote results of vascular operations in this cohort of patients.
Assuntos
Assistência Ambulatorial/normas , Aorta Abdominal/cirurgia , Arteriopatias Oclusivas/cirurgia , Diabetes Mellitus Tipo 2/complicações , Artéria Ilíaca/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Garantia da Qualidade dos Cuidados de Saúde/métodos , Idoso , Anastomose Cirúrgica , Arteriopatias Oclusivas/complicações , Diabetes Mellitus Tipo 2/cirurgia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Inquéritos e QuestionáriosAssuntos
Complicações do Diabetes/epidemiologia , Diabetes Mellitus/epidemiologia , Neoplasias Pancreáticas , Saúde Global , Humanos , Morbidade/tendências , Neoplasias Pancreáticas/epidemiologia , Neoplasias Pancreáticas/etiologia , Neoplasias Pancreáticas/cirurgia , Fatores de Risco , Taxa de SobrevidaRESUMO
Glucose metabolism is evaluated before and after the operation in 51 patients (41--men, 10--women), operated on account of the complicated chronic pancreatitis. The distal pancreatic resection (50% of the gland) was performed in all cases. The middle age of the patients is 41.2+/-7.9. Body mass index (BMI) was 23.7+/-3.4 kg/m2. After distal pancreatic resection 33.33% of patients with chronic pancreatitis didn't have glucose metabolism disturbances. In 27.45% of patients diabetes mellitus was diagnosed for the first time after the operation. At the same time, in 5.8% of cases the worsening from the light to the moderate form of diabetes mellitus was observed. As far as blood glucose level (glycemic control) doesn't have any prognostic value in predicting diabetes mellitus in early postoperative period, it is necessary to recommend regular supervision by the endocrinologist to the patient after discharge. All patients with chronic pancreatitis should be carefully investigated so as to detect glycaemic disorders. It is recommended to determine fasting blood glucose level, glycemia throughout the day, glycated hemoglobin, 24 hours' glucosuria. It is also essential to perform an oral glucose tolerance test (OGTT).
Assuntos
Transtornos do Metabolismo de Glucose/etiologia , Glucose/metabolismo , Pancreatectomia/métodos , Pancreatite Crônica/complicações , Adulto , Feminino , Seguimentos , Transtornos do Metabolismo de Glucose/sangue , Transtornos do Metabolismo de Glucose/urina , Humanos , Masculino , Pancreatite Crônica/metabolismo , Pancreatite Crônica/cirurgia , Prognóstico , Estudos RetrospectivosRESUMO
The article deals with analysing the outcomes of administering low-molecular-weight heparins (LMWH) by the example of nadroparin ("Fraxiparin") during the intraoperative period in patients diagnosed with atherosclerotic lesions of femoropoplietal-crural segment of the lower-limb arteries as compared with non-fractionated heparin (NFH). Studied were the alterations in the parameters of the plasmatic and thrombocytic links of haemostasis on the background of administering various molecular-weight fractions of heparin. A conclusion was drawn on advantageous use of LMWH in the cohort of the patients involved. Also presented herein is an analysis of the literature data concerning appropriate usage of LMWH during the intraoperative period.
Assuntos
Anticoagulantes/administração & dosagem , Heparina de Baixo Peso Molecular/administração & dosagem , Cuidados Intraoperatórios/métodos , Isquemia/cirurgia , Perna (Membro)/irrigação sanguínea , Trombose/prevenção & controle , Procedimentos Cirúrgicos Vasculares/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Seguimentos , Humanos , Complicações Intraoperatórias/prevenção & controle , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/prevenção & controle , Estudos Retrospectivos , Resultado do TratamentoRESUMO
Early studies have demonstrated that the unique phenomenon ATP aerobic synthesis on neutrophilic plasma membranes is observed when neutrophils are activated with the chemoattractive peptide FMLP. This paper presents the results of the study of a possible association of ATP plasma membranous synthesis with priming, with the occurrence of respiratory explosion and apoptosis of the neutrophils isolated from the blood of donors and patients with surgical infection of different severity. The interaction of neutrophilic plasma membranes with FMLP and with hTNF (was attended by ATP synthesis. Examining the level of FMLP-stimulated production of superoxide in patients with surgical infection revealed that the amount of the superoxide produced by neutrophils noticeably decreased and droppped by more than 5 times in sepsis. The FMLP-stimulated plasma membranous synthesis of ATP was determined in the same patients. A decrease in the production of superoxide was simultaneously accompanied by a reduction in the plasma membranous synthesis of ATP. Both the plasma membranous synthesis of ATP and the production of superoxide declined in sepsis at the most. The neutrophils isolated from peripheral blood of the same patients showed DNA damage whose degree was directly related to the condition of a patient. The maximum DNA damages were observed in sepsis. The findings suggest that apoptosis is induced in surgical infection in the peripheral neutrophils. The DNA damage and the FMLP-stimulated plasma membranous synthesis of ATP was estimated in the neutrophils isolated from the inflammation focus. It turned out that in local surgical infection, there were the maximum DNA damages and the FMLP-stimulated plasma membranous synthesis of ATP was lower than that in the peripheral neutrophils. It can be suggested that the FMLP-stimulated plasma membranous synthesis of ATP may be a regulators of neutrophilic functional states in surgical infection and sepsis.
Assuntos
Trifosfato de Adenosina/biossíntese , Neutrófilos/metabolismo , Infecção da Ferida Cirúrgica/sangue , Trifosfato de Adenosina/sangue , Adulto , Idoso , Membrana Celular/metabolismo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , N-Formilmetionina Leucil-Fenilalanina/metabolismoRESUMO
Plasma-membrane-enriched particles isolated from the tissues of malignant tumors of different sites are shown to accumulate ATP under the influence of polypeptide growth factors and cytokines whose receptors have a tyrosine kinase activity. Polypeptide growth factors, such as EGF, FGF, NGF, TNF, insulin, and the cytokine IL-2, were studied on the accumulation of adenosine-5'-triphosphate (ATP) by the preparations of plasma-membrane-enriched particles isolated from the target tissues of human malignant tumors. The tumor (transformed) cell plasma membranes of the lung, bowel, stomach, pancreas, as well as the cells of neurinoma and a retroperitoneal extra-organ malignant tumor (leiomyosarcoma) are demonstrated to be able to synthesize ATP from inorganic phosphate and ADP under aerobic conditions human with the participation of the cyanide-insensitive proton phoric NADH-bound transversely oriented chain. Signal-stimulated accumulation of plasma membranous ATP was found to increase in the tissues in malignant transformation as compared to that in normal tissues. Experiments using selective inhibitors of tyrosine kinases (tyrphostin-25, quercetin) indicated the involvement of plasma membranous signal-transducing ATP in the activation of receptor tyrosine kinase growth factors.
Assuntos
Trifosfato de Adenosina/biossíntese , Membrana Celular/metabolismo , Transformação Celular Neoplásica/metabolismo , Substâncias de Crescimento/farmacologia , Interleucina-2/farmacologia , Neoplasias/metabolismo , Difosfato de Adenosina/biossíntese , Antineoplásicos/farmacologia , Inibidores Enzimáticos/farmacologia , Humanos , Neoplasias/enzimologia , Proteínas Tirosina Quinases/antagonistas & inibidores , Proteínas Tirosina Quinases/metabolismo , Quercetina/farmacologia , Transdução de Sinais , Células Tumorais Cultivadas/efeitos dos fármacos , Células Tumorais Cultivadas/metabolismo , Tirfostinas/farmacologiaRESUMO
Plasma membrane signal ATP (psATP) was synthesized in response to the effect insulin (0.4 microgram/ml) in erythrocyte membranes, washed in 0.25 M sucrose and maintained in the mixture containing all the components required for aerobic phosphorylation. Biosynthesis of psATP was completely inhibited by amiloride at a concentration of 2 x 10(-3) M. Ouabain (0.5 x 10(-6) M) inhibited the triphosphate synthesis by 95%. Monensin (0.3 x 10(-6) M) activated ATP formation 2-fold approximately in erythrocyte membranes both stimulated by insulin and free of the hormone effect. Monensin, added into the incubation mixture simultaneously with ouabain, abolished its inhibitory effect on psATP synthesis. In absence of Na+ the psATP biosynthesis was not detected. Protonophore FCCP stimulated the biosynthesis at various concentrations from 10(-7) to 10(-3) M. These data indicated that biosynthesis of psATP is related to Na+/H+ metabolism in plasma membranes of human erythrocytes.
Assuntos
Trifosfato de Adenosina/biossíntese , Amilorida/farmacologia , Membrana Eritrocítica/efeitos dos fármacos , Hidrogênio/metabolismo , Insulina/farmacologia , Sódio/metabolismo , Carbonil Cianeto p-Trifluormetoxifenil Hidrazona/farmacologia , Membrana Eritrocítica/metabolismo , Humanos , Técnicas In VitroRESUMO
Production of superoxide anion by polymorphonuclear leukocytes (PMNL) was studied in donors and patients with burns. N-formyl-L-Met-L-Leu-L-Phe (FMLP) was used as an activator of PMNL. Evaluation in production of superoxide anion, caused by the activating effect of FMLP, proved to be useful as a diagnostic and prognostic criterion. 56 preparations of blood were studied in 21 patients with burns within the periods of acute burns toxemia, burns septicotoxemia and convalescence. Superoxide anion generating activity correlated with the disease severity: content of superoxide anion was distinctly decreased within the period of sepsis development. At the same time, complex treatment of the patients, involving step-by-step autodermoplastics, antibacterial preparations and immunotherapy, enabled to restore the superoxide anion production up to normal values. Evaluation of the superoxide anion generating activity by PMNL in the patients with severe forms of burns enabled to estimate the state of cell immunity in the patients depending on severity of burns trauma, period of burn disease and adequacy of the treatment applied.
Assuntos
Queimaduras/metabolismo , Neutrófilos/metabolismo , Superóxidos/sangue , Queimaduras/sangue , Queimaduras/cirurgia , Humanos , Neutrófilos/enzimologia , Fagocitose , Prognóstico , Fatores de TempoRESUMO
Energy-consuming, ATP-dependent step of transmembrane transmission of the signal for chemotaxis was studied at the pathway between receptors of formylpeptide and membrane kinase of polymorphonuclears leukocytes. Some peptides, particularly formylmethionyl leucylphenylalanine (FMLP), were demonstrated to have a property of chemostimulation, i.e. they had an ability to stimulate phagocytosis in human and animal neutrophils due to presence of specific receptors on the cell surface. Isolation, identification and use of the membrane ATP, synthesized in presence of the chemotactic peptide FMLP, is described. The ATP was produced within 1 min on the surface of polymorphonuclear leukocytes during aerobic phosphorylation from ADP and inorganic phosphate, coupled with transmission of electrons and protons. The ATP-producing activity of polymorphonuclear leukocytes, stimulated by the formylpeptide, was distinctly decreased in the patients with various forms of purulent surgical infections--sepsis, pyo-resorptive fever. The ATP, synthesized in plasmatic membranes of polymorphonuclear leukocytes, appears to serve as a translator of the chemotactic, energy-consuming signal.
Assuntos
Trifosfato de Adenosina/biossíntese , N-Formilmetionina Leucil-Fenilalanina/farmacologia , Neutrófilos/metabolismo , Trifosfato de Adenosina/sangue , Animais , Membrana Celular/metabolismo , Cobaias , Humanos , Técnicas In Vitro , Infecção da Ferida Cirúrgica/metabolismoRESUMO
Distinct increase in content of ATP was found in preparations of enriched with plasmatic membranes particles from rat thymus T lymphocytes and from human peripheric blood T lymphocytes after their incubation with interleukin-2 as compared with controls which did not contain the peptide. The phenomenon observed was manifested only if these particles from T cells were preincubated with concanavalin A (2 min, 40 micrograms/ml), which is required to expression of the receptors for interleukin-2. The membrane-bound ATP, formed after the interleukin-2 effect on receptors of T lymphocytes, appears to serve as the secondary messenger activating protein kinase C.