RESUMO
AIM OF THE STUDY: The implantation of biological prostheses in an at-risk environment has seen increasing use. Their markedly higher cost compared to synthetic prostheses makes it important to analyse their usefulness in terms of actual benefit and cost-effectiveness. This study aims to examine the relevance of bioprostheses during surgical repair of Grade II/III ventral hernias as classified by the Ventral hernia working group (VHWG). MATERIALS AND METHODS: This study analysed the data of 119 patients requiring non-emergency repair of VHWG II/III grade hernias between 2010 and 2017. The results of patients who were treated with a bioprosthesis (n=59) were compared to those receiving a synthetic prosthesis (n=60). The primary outcome was surgical site infection (SSI) at 90 days. The secondary endpoints were hernia recurrence rate, cost of the prosthesis, duration of hospital stay and re-hospitalisation rate. RESULTS: The two groups were shown to be comparable by analysis of demographic, pre- and intraoperative data. The SSI rate was significantly higher in the bioprosthesis group (20% vs. 7%; P=0.010), as was the recurrence rate (56% vs. 28%; P=0.003) with a median follow-up of 40 months. The cost of the bioprosthesis was significantly higher than that of the synthetic prosthesis (3363 vs. 249; P<0.010). CONCLUSION: In this retrospective study, the use of a bioprosthesis for repair of VHWG II/III ventral hernias was associated with a higher rate of both SSI and hernia recurrence at a cost 13 times greater than the use of a synthetic prosthesis.
Assuntos
Hérnia Ventral , Herniorrafia , Hérnia Ventral/cirurgia , Herniorrafia/métodos , Humanos , Próteses e Implantes , Recidiva , Estudos Retrospectivos , Telas Cirúrgicas , Infecção da Ferida Cirúrgica/epidemiologia , Infecção da Ferida Cirúrgica/etiologia , Resultado do TratamentoRESUMO
The study used mass spectrometry imaging (MSI) to map the distribution of enzymatically degraded cell wall polysaccharides in maize stems for two genotypes and at several stages of development. The context was the production of biofuels, and the overall objective was to better describe the structural determinants of recalcitrance of grasses in bioconversion. The selected genotypes showed contrasting characteristics in bioconversion assays as well as in their lignin deposition pattern. We compared the pattern of cell wall polysaccharide degradation observed by MSI following the enzymatic degradation of tissues with that of lignin deposition. Several enzymes targeting the main families of wall polysaccharides were used. In the early stages of development, cellulose and mixed-linked ß-glucans appeared as the main polysaccharides degraded from the walls, while heteroxylan products were barely detected, suggesting subsequent deposition of heteroxylans in the walls. At all stages and for both genotypes, enzymatic degradation occurred preferentially in nonlignified walls for all structural families of polysaccharides studied here. However, our results showed heterogeneity in the distribution of heteroxylan products according to their chemical structure: arabinosylated products were mostly represented in the pith center, while glucuronylated products were found at the pith periphery. The conclusions of our work are in agreement with those of previous studies. The MSI approach presented here is unique and attractive for addressing the histological and biochemical aspects of biomass recalcitrance to conversion, as it allows for a simultaneous interpretation of cell wall degradation and lignification patterns at the scale of an entire stem section.
Assuntos
Celulose/química , Polissacarídeos/química , Zea mays/química , Parede Celular/química , Espectrometria de Massas , Caules de Planta/químicaRESUMO
BACKGROUND: Prosthetic-related infection and erosion occurring after a laparoscopic ventral rectopexy (LVR) are rare complications, and their importance is often underestimated. The aim of this study was to compare the incidence rate and surgical management of these complications in LVR patients with polyester (PE) or polypropylene (PP) prostheses. METHODS: From January 2004 to June 2012, 149 patients underwent LVR with PE and 176 underwent LVR with PP. Surgical management and rate of infectious and erosive prosthesis-related complications, depending on the type of prosthesis, were described and compared. Functional results after complications were assessed. RESULTS: Five patients from the PE prosthesis group (3.3 %), compared with two patients from the PP prosthesis group (1.1 %), experienced prosthesis-related infection or erosion (p = 0.16). The rate of erosion alone was 3.3 % in patients with a PE prosthesis, and 0.55 % in patients with a PP prosthesis (p = 0.06). The average time until clinical diagnosis of a prosthesis-related complication was identical for both groups: 31 months (range 3-62 months). All patients underwent surgical removal of the prosthesis: For the five patients from the PE group, complete removal was performed by laparoscopy associated with a transanal procedure. For the two patients in the PP mesh group, laparoscopy was ineffective in removing the mesh which was partially removed through a subsequent transanal procedure. None of the patients had a protective stoma, and in all patients the complication had resolved 12 months after removal. Only one patient had worsening functional symptoms (fecal incontinence) after prosthesis removal. CONCLUSIONS: When a prosthesis-related infection or erosion occurs, treatment consists in the surgical removal of the prosthesis by laparoscopy/and/or a transanal procedure. Functional symptoms do not routinely recur after prosthesis removal.
Assuntos
Remoção de Dispositivo/métodos , Laparoscopia/instrumentação , Desenho de Prótese/efeitos adversos , Infecções Relacionadas à Prótese/epidemiologia , Telas Cirúrgicas/efeitos adversos , Adulto , Idoso , Feminino , Seguimentos , Humanos , Incidência , Laparoscopia/métodos , Pessoa de Meia-Idade , Poliésteres/efeitos adversos , Polipropilenos/efeitos adversos , Período Pós-Operatório , Falha de Prótese/efeitos adversos , Falha de Prótese/etiologia , Infecções Relacionadas à Prótese/etiologia , Infecções Relacionadas à Prótese/cirurgia , Prolapso Retal , Retocele , Reto/cirurgia , Estudos Retrospectivos , Fatores de Tempo , Cirurgia Endoscópica Transanal/métodos , Resultado do TratamentoRESUMO
PURPOSE OF THE STUDY: The management of the severe blunt splenic injuries remains debated. The aim of this study is to evaluate the morbidity and mortality of splenic injury according to severity and management (surgery, embolization, non-operative management [NOM]). METHODS: A prospective multicenter study was conducted including patients aged 16 years and older with diagnosed splenic injury. We evaluated severity according to the AAST classification, the presence of hemoperitoneum or a contrast blush on initial CT scan. The initial hemodynamic status, patients co-morbidities, the ISS (injury severity score), management and morbidity were also noted. RESULTS: Between May 2010 and May 2012, 91 patients were included. Thirty-seven patients (41%) had mild splenic injury (AAST I or II and a small hemoperitoneum) while 54 patients (59%) had severe splenic injury (AAST III or greater). The management included 18 splenectomies (20%), 15 embolizations (16%). Among 67 patients undergoing NOM without initial embolization, five (7%) developed secondary bleeding, five required surgery and nine underwent secondary embolization. No patient died and morbidity was 44% (n=40), 13% for mild injuries vs. 65% for severe injuries (P<0.01). For severe injuries, total morbidity was 58% after NOM, 73% after embolization and 70% after surgery. Specific morbidity related to the management was 10% after NOM vs. 47% after embolization (P=0.02). Specific morbidity after surgery was 15%. CONCLUSION: Embolization, because of its important specific morbidity, should not be performed as a prophylactic measure, but only in presence of clinical or laboratory signs of bleeding.
Assuntos
Embolização Terapêutica/estatística & dados numéricos , Tempo de Internação/estatística & dados numéricos , Baço/cirurgia , Esplenectomia/estatística & dados numéricos , Ferimentos não Penetrantes/epidemiologia , Ferimentos não Penetrantes/terapia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Seguimentos , França/epidemiologia , Humanos , Escala de Gravidade do Ferimento , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Fatores de Risco , Baço/lesões , Esplenectomia/métodos , Resultado do Tratamento , Ferimentos não Penetrantes/complicações , Ferimentos não Penetrantes/diagnóstico , Ferimentos não Penetrantes/mortalidadeRESUMO
BACKGROUND AND AIMS: Rhamnogalacturonan II (RGII) is a structurally complex pectic sub-domain composed of more than 12 different sugars and 20 different linkages distributed in five side chains along a homogalacturonan backbone. Although RGII has long been described as highly conserved over plant evolution, recent studies have revealed variations in the structure of the polysaccharide. This study examines the fine structure variability of RGII in wine, focusing on the side chains A and B obtained after sequential mild acid hydrolysis. Specifically, this study aims to differentiate intrinsic structural variations in these RGII side chains from structural variations due to acid hydrolysis. METHODS: RGII from wine (Vitis vinifera Merlot) was sequentially hydrolysed with trifluoroacetic acid (TFA) and the hydrolysis products were separated by anion-exchange chromatography (AEC). AEC fractions or total hydrolysates were analysed by MALDI-TOF mass spectrometry. KEY RESULTS: The optimal conditions to recover non-degraded side chain B, side chain A and RGII backbone were 0·1 m TFA at 40 °C for 16 h, 0·48 m TFA at 40 °C for 16 h (or 0·1 m TFA at 60 °C for 8 h) and 0·1 m TFA at 60 °C for 16 h, respectively. Side chain B was particularly prone to acid degradation. Side chain A and the RGII GalA backbone were partly degraded by 0·1 m TFA at 80 °C for 1-4 h. AEC allowed separation of side chain B, methyl-esterified side chain A and non-methyl-esterified side chain A. The structure of side chain A and the GalA backbone were highly variable. CONCLUSIONS: Several modifications to the RGII structure of wine were identified. The observed dearabinosylation and deacetylation were primarily the consequence of acidic treatment, while variation in methyl-esterification, methyl-ether linkages and oxidation reflect natural diversity. The physiological significance of this variability, however, remains to be determined.
Assuntos
Parede Celular/química , Pectinas/química , Polissacarídeos/química , Vitis/química , Parede Celular/metabolismo , Esterificação , Concentração de Íons de Hidrogênio , Hidrólise , Pectinas/isolamento & purificação , Pectinas/metabolismo , Polissacarídeos/isolamento & purificação , Polissacarídeos/metabolismo , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Vitis/metabolismo , VinhoRESUMO
BACKGROUND: We hypothesised that in blunt trauma patients with haemodynamic instability and haemoperitoneum on hospital admission, the haemorrhagic source may not be confined to the peritoneum. The purpose of this study was to describe the incidence and location of bleeding source in this population. METHODS: The charts of trauma patients admitted consecutively between January 2005 and January 2010 to our level I Regional Trauma Centre were reviewed retrospectively. All hypotensive patients presenting a haemoperitoneum on admission were included. Hypotension was defined by a systolic blood pressure ≤ 90 mmHg. The haemoperitoneum was quantified on CT images or from operative reports as moderate (Federle score<3 or between 200 and 500 ml) or large (Federle score ≥ 3 or >500 ml). Active bleeding (AB) was defined as injury requiring a surgical or radiologic haemostatic procedure, regardless of origin (peritoneal (PAB) or extraperitoneal (EPAB)). RESULTS: Of 1079 patients admitted for severe trauma, 110 patients met the inclusion criteria. Seventy-eight (71%) were male, mean age 35.3 (SD 19) years and mean ISS 36.5 (SD 20.5). Among the 91 patients who had AB, 37 patients (41%) had PAB, 34 (37%) had EPAB and 20 had both (22%). Forty-eight (53%) of them had moderate haemoperitoneum and 43 (47%) had large haemoperitoneum. A large haemoperitoneum had positive predictive value for PAB of 88% (95% CI 75-95%) and negative predictive value of 65% (95% CI 49-79%). The corresponding values in the subgroup of patients with EPAB were 65% (95% CI 38-86%) and 76% (95% CI 59-88%). CONCLUSION: Haemoperitoneum was associated with PAB in only 52% of hypotensive blunt trauma patients and 63% of bleeding patients. In contrast, 59% of bleeding patients had at least one EPAB. The screening of a haemoperitoneum as a marker of active haemorrhagic source may be confusing and lead to misdiagnosis and inappropriate strategy. Clinician should exclude carefully the presence of any EPAB explaining haemorrhagic shock, before to decide haemostatic treatment.
Assuntos
Traumatismos Abdominais/diagnóstico por imagem , Erros de Diagnóstico/prevenção & controle , Hemoperitônio/diagnóstico por imagem , Hemostáticos/administração & dosagem , Hipotensão/etiologia , Peritônio/patologia , Tomografia Computadorizada por Raios X , Ferimentos não Penetrantes/diagnóstico por imagem , Traumatismos Abdominais/complicações , Traumatismos Abdominais/terapia , Adulto , Feminino , Hemoperitônio/etiologia , Hemoperitônio/terapia , Humanos , Escala de Gravidade do Ferimento , Masculino , Guias de Prática Clínica como Assunto , Valor Preditivo dos Testes , Estudos Retrospectivos , Centros de Traumatologia , Ferimentos não Penetrantes/complicações , Ferimentos não Penetrantes/terapiaRESUMO
Plant cell walls are complex structures critical for plant fitness and valuable for human nutrition as dietary fiber and for industrial uses such as biofuel production. The cell wall polysaccharides in wheat endosperm consist of two major polymers, arabinoxylans and beta-glucans, as well as other minor components. Most of these polysaccharides are synthesized in the Golgi apparatus but the mechanisms underlying their synthesis have yet to be fully elucidated and only a few of the enzymes involved have been characterized. To identify actors involved in the wheat endosperm cell wall formation, we used a subcellular fractionation strategy to isolate Golgi-enriched fractions from endosperm harvested during active cell wall deposition. The proteins extracted from these Golgi-enriched fractions were analyzed by LC-MS/MS. We report the identification of 1135 proteins among which 64 glycosyltransferases distributed in 17 families. Their potential function in cell wall synthesis is discussed. In addition, we identified 63 glycosylhydrolases, some of which may be involved in cell wall remodeling. Several glycosyltransferases were validated by showing that when expressed as fusion proteins with a fluorescent reporter, they indeed accumulate in the Golgi apparatus. Our results provide new candidates potentially involved in cell wall biogenesis in wheat endosperm.
Assuntos
Parede Celular/enzimologia , Endosperma/enzimologia , Glicosiltransferases/metabolismo , Proteínas de Plantas/metabolismo , Triticum/enzimologia , Fibras na Dieta/metabolismo , Complexo de Golgi/enzimologia , Humanos , Espectrometria de Massas , Polissacarídeos/biossínteseRESUMO
In fleshy fruits, the variability of cell morphology at the fruit scale is largely unknown. It presents both a huge variability and a high level of organization. Better knowledge of cell morphology heterogeneity within the fruit is necessary to understand fruit development, to model fruit mechanical behaviour, or to investigate variations of physico-chemical measurements. A generic approach is proposed to build cartographies of cell morphology at the fruit scale, which depict regions corresponding to different cell morphologies. The approach is based on: (1) sampling the whole fruit at known positions; (2) imaging and quantifying local cell morphology; (3) pooling measurements to take biological variability into account and (4) projecting results in a morphology model of the whole fruit. The result is a synthetic representation of cell morphology variations within the whole fruit. The method was applied to the characterization of cell morphology in tomato pericarp. Two different imaging scales that provided complementary descriptions were used: 3D confocal microscopy and macroscopy. The approach is generic and can be adapted to other fruits or other products.
Assuntos
Frutas/citologia , Solanum lycopersicum/citologia , Forma Celular , Microscopia/métodosRESUMO
A detailed and comprehensive understanding of seed reserve accumulation is of great importance for agriculture and crop improvement strategies. This work is part of a research programme aimed at using Brachypodium distachyon as a model plant for cereal grain development and filling. The focus was on the Bd21-3 accession, gathering morphological, cytological, and biochemical data, including protein, lipid, sugars, starch, and cell-wall analyses during grain development. This study highlighted the existence of three main developmental phases in Brachypodium caryopsis and provided an extensive description of Brachypodium grain development. In the first phase, namely morphogenesis, the embryo developed rapidly reaching its final morphology about 18 d after fertilization (DAF). Over the same period the endosperm enlarged, finally to occupy 80% of the grain volume. During the maturation phase, carbohydrates were continuously stored, mainly in the endosperm, switching from sucrose to starch accumulation. Large quantities of ß-glucans accumulated in the endosperm with local variations in the deposition pattern. Interestingly, new ß-glucans were found in Brachypodium compared with other cereals. Proteins (i.e. globulins and prolamins) were found in large quantities from 15 DAF onwards. These proteins were stored in two different sub-cellular structures which are also found in rice, but are unusual for the Pooideae. During the late stage of development, the grain desiccated while the dry matter remained fairly constant. Brachypodium exhibits some significant differences with domesticated cereals. Beta-glucan accumulates during grain development and this cell wall polysaccharide is the main storage carbohydrate at the expense of starch.
Assuntos
Brachypodium/crescimento & desenvolvimento , Sementes/crescimento & desenvolvimento , Amido/metabolismo , Brachypodium/embriologia , Brachypodium/fisiologia , Brachypodium/ultraestrutura , Parede Celular/metabolismo , Grão Comestível/embriologia , Grão Comestível/crescimento & desenvolvimento , Grão Comestível/fisiologia , Grão Comestível/ultraestrutura , Endosperma/crescimento & desenvolvimento , Endosperma/metabolismo , Ácidos Graxos/metabolismo , Proteínas de Plantas/metabolismo , Polissacarídeos/metabolismo , Proteoma , Sementes/embriologia , Sementes/fisiologia , Sementes/ultraestrutura , Sacarose/metabolismo , beta-Glucanas/metabolismoRESUMO
In addition to the starchy endosperm, a specialized tissue accumulating storage material, the endosperm of wheat grain, comprises the aleurone layer and the transfer cells next to the crease. The transfer cells, located at the ventral region of the grain, are involved in nutrient transfer from the maternal tissues to the developing endosperm. Immunolabeling techniques, Raman spectroscopy, and synchrotron infrared micro-spectroscopy were used to study the chemistry of the transfer cell walls during wheat grain development. The kinetic depositions of the main cell wall polysaccharides of wheat grain endosperm, arabinoxylan, and (1-3)(1-4)-ß-glucan in transfer cell walls were different from kinetics previously observed in the aleurone cell walls. While (1-3)(1-4)-ß-glucan appeared first in the aleurone cell walls at 90°D, arabinoxylan predominated in the transfer cell walls from 90 to 445°D. Both aleurone and transfer cell walls were enriched in (1-3)(1-4)-ß-glucan at the mature stage of wheat grain development. Arabinoxylan was more substituted in the transfer cell walls than in the aleurone walls. However, arabinoxylan was more feruloylated in the aleurone than in the transfer cell walls, whatever the stage of grain development. In the transfer cells, the ferulic acid was less abundant in the outer periclinal walls while para-coumarate was absent. Possible implications of such differences are discussed.
Assuntos
Parede Celular/metabolismo , Grão Comestível/metabolismo , Endosperma/metabolismo , Polissacarídeos/metabolismo , Triticum/metabolismo , Diferenciação Celular , Grão Comestível/crescimento & desenvolvimento , Endosperma/citologia , Espectroscopia de Infravermelho com Transformada de Fourier , Análise Espectral Raman , Xilanos/análiseRESUMO
GOAL OF STUDY: Treatment of splenic injury is not standardized. We conducted an inventory of splenic injury treatment modalities of splenic injury in the Languedoc-Roussillon region of France. METHODS: A questionnaire was sent by e-mail to 33 surgeons practicing in 10 hospitals in that region. Surgeons were asked: how many cases were treated per year (PMSI databank for the last three years), local resources (resuscitation bay or intensive care unit, availability of CT and interventional radiology), indications (surgery, embolization, nonoperative management [NOM]), prognostic criteria, NOM modalities (duration of bed rest, hospital stay, restriction of physical activity, thromboembolic prophylaxis, and imaging schedule). RESULTS: Thirty-one surgeons replied. An average of 185 patients were treated per year. There was consensus concerning the indication for urgent splenectomy, NOM was practiced in the stable patient (even with diffuse hemoperitoneum) and splenic artery embolization was performed for active bleeding (blush on CT) (for the six centers who have interventional radiology at their disposal). Disparities existed between centers concerning the modalities of NOM excepting imaging monitoring, initial surveillance in resuscitation bay or intensive care and in the therapeutic indications when bleeding persisted. CONCLUSION: Based on the consensus observed in this study and an analysis of the literature, a uniform treatment policy can be proposed.
Assuntos
Contusões/terapia , Embolização Terapêutica/estatística & dados numéricos , Emergências , Baço/lesões , Esplenectomia/estatística & dados numéricos , Tomografia Computadorizada por Raios X/estatística & dados numéricos , Consenso , Contusões/diagnóstico por imagem , França , Hemoglobinometria , Hemoperitônio/diagnóstico por imagem , Hemoperitônio/terapia , Humanos , Radiologia Intervencionista , Fatores de Risco , Baço/irrigação sanguínea , Baço/diagnóstico por imagem , Artéria Esplênica/diagnóstico por imagem , Inquéritos e Questionários , Revisão da Utilização de Recursos de Saúde/estatística & dados numéricosRESUMO
Seed storage proteins are of great importance in nutrition and in industrial transformation because of their functional properties. Brachypodium distachyon has been proposed as a new model plant to study temperate cereals. The protein composition of Brachypodium grain was investigated by separating the proteins on the basis of their solubility combined with a proteomic approach. Salt-soluble proteins as well as salt-insoluble proteins separated by two-dimensional gel electrophoresis revealed 284 and 120 spots, respectively. Proteins from the major spots were sequenced by mass spectrometry and identified by searching against a Brachypodium putative protein database. Our analysis detected globulins and prolamins but no albumins. Globulins were represented mainly by the 11S type and their solubility properties corresponded to the glutelin found in rice. An in silico search for storage proteins returned more translated genes than expressed products identified by mass spectrometry, particularly in the case of prolamin type proteins, reflecting a strong expression of globulins at the expense of prolamins. Microscopic examination of endosperm cells revealed scarce small-size starch granules surrounded by protein bodies containing 11S globulins. The presence of protein bodies containing glutelins makes B. distachyon closer to rice or oat than to wheat endosperm.
Assuntos
Proteínas de Plantas/metabolismo , Poaceae/metabolismo , Sementes/metabolismo , Eletroforese em Gel Bidimensional , Globulinas/metabolismo , Espectrometria de Massas , Microscopia Eletrônica de Transmissão , Poaceae/genética , Poaceae/ultraestrutura , Prolaminas/metabolismo , Sementes/genética , Sementes/ultraestruturaRESUMO
Monoclonal antibodies were raised against rhamnogalacturonan I backbone, a pectin domain, using Arabidopsis thaliana seed mucilage-derived rhamnogalacturonan I oligosaccharides--BSA conjugates. Two monoclonal antibodies, designated INRA-RU1 and INRA-RU2, selected for further characterization, were specific for the backbone of rhamnogalacturonan I, displaying no binding activity against the other pectin domains i.e. homogalacturonans, galactans or arabinans. A range of oligosaccharides was prepared by enzymatic digestion of rhamnogalacturonan I isolated from Arabidopsis thaliana seed mucilage and from sugar beet pectin, purified by low-pressure chromatography and characterized by high-performance anion-exchange chromatography and mass spectrometry. These rhamnogalacturonan I oligomers were used to characterize the binding site of the two monoclonal antibodies by competitive inhibition. Both INRA-RU1 and INRA-RU2 showed maximal binding to the [-->2)-alpha-L-rhamnosep-(1-->4)-alpha-D-galacturonic acid p-(1-->](7) structural motif but differed in their minimum binding requirement. INRA-RU2 required at least two disaccharide (rhamnose-galacturonic acid) repeats for the antibody to bind, while INRA-RU1 required a minimum of six disaccharide repeats. Furthermore, the binding capacity of INRA-RU1 decreased steeply as the number of disaccharide repeats go beyond seven. Each of these antibodies reacted with hairy regions isolated from sugar beet pectin. Immunofluorescence microscopy indicated that both antibodies can be readily used to detect rhamnogalacturonan I epitopes in various cell wall samples.
Assuntos
Anticorpos Monoclonais/imunologia , Pectinas/química , Pectinas/imunologia , Anticorpos Monoclonais/biossíntese , Arabidopsis/química , Sequência de Carboidratos , Parede Celular/metabolismo , Cromatografia em Gel , Ensaio de Imunoadsorção Enzimática , Imunofluorescência , Glicoproteínas/biossíntese , Haptenos/biossíntese , Haptenos/imunologia , Isotipos de Imunoglobulinas/biossíntese , Dados de Sequência Molecular , Oligossacarídeos/biossíntese , Oligossacarídeos/imunologia , Solubilidade , ÁguaRESUMO
Chronic beryllium disease (CBD) is a granulomatous disorder that affects the lung after exposure to beryllium. The present study reports short- and long-term evolution of granulomatous and fibrotic components in eight patients with severe CBD receiving corticosteroid therapy. Eight patients with confirmed CBD were studied at baseline, after initial corticosteroid treatment (4-12 months), at relapse and at the final visit. Beryllium exposure, Glu(69) (HLA-DPB1 genes coding for glutamate at position beta69) polymorphism, symptoms, pulmonary function tests (PFT), serum angiotensin-converting enzyme (SACE) and high-resolution computed tomography (HRCT) quantification of pulmonary lesions were analysed. The CBD patients were observed for a median (range) of 69 (20-180) months. After stopping beryllium exposure, corticosteroids improved symptoms and PFT (vital capacity +26%, diffusing capacity of the lung for carbon monoxide +15%), and decreased SACE level and active lesion HRCT score. In total, 18 clinical relapses occurred after the treatment was tapered and these were associated with SACE and active lesion HRCT score impairment. At the final visit, corticosteroids had completely stabilised all parameters including both HRCT scores of active lesions and fibrotic lesions in six out of eight patients. Corticosteroids were beneficial in chronic beryllium disease. They were effective in suppressing granulomatosis lesions in all cases and in stopping the evolution to pulmonary fibrosis in six out of eight patients.
Assuntos
Corticosteroides/uso terapêutico , Beriliose/tratamento farmacológico , Líquido da Lavagem Broncoalveolar/imunologia , Programas de Rastreamento , Fibrose Pulmonar/prevenção & controle , Adulto , Beriliose/complicações , Beriliose/imunologia , Líquido da Lavagem Broncoalveolar/citologia , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Fibrose Pulmonar/etiologia , Recuperação de Função Fisiológica , Testes de Função Respiratória , Estudos RetrospectivosRESUMO
Infrared microspectroscopy and immunolabeling techniques were employed in order to obtain deeper insight into the biochemical nature of aleurone cell walls of wheat grain. The use of a synchrotron source, thanks to its intrinsic brightness, has provided unprecedented information at the level of a few micrometers and has allowed the discrimination of various polysaccharides in cell walls. The high spectral quality obtained in the small analyzed domain has been beneficial in estimating the relative proportions of beta-glucan and arabinoxylan, through the use of principal component analysis (PCA). The highest amount of beta-glucan is found in periclinal cell walls close to the starchy endosperm. The junction regions between aleurone cells are enriched in arabinoxylan. At the early stage of wheat grain development (271 degrees D), the chemical composition along the cell walls is more heterogeneous than at the mature stage. Both synchrotron infrared microspectroscopy and immunolabeling experiments made it possible to reveal the spatial heterogeneity of the various chemical compositions of aleurone cell walls.
Assuntos
Parede Celular/química , Proteínas de Plantas/química , Triticum , Extratos Vegetais/química , Espectroscopia de Infravermelho com Transformada de Fourier/métodos , Síncrotrons , Triticum/química , Triticum/citologia , Xilanos/química , beta-Glucanas/químicaRESUMO
Anthracofibrosis, defined as bronchial luminal narrowing with black pigmentation of the overlying mucosa, has been attributed to tuberculosis. Three patients with anthracofibrosis without mycobacterial infection are described who had previous occupational exposure to mixed dusts. CT scans showed calcified hilar lymph nodes in two patients. Surgical biopsy in one patient and autopsy in another revealed fibrotic lymph nodes with black pigmentation. Mineralogical analysis by transmission electron microscopy of pulmonary, hilar and/or bronchial samples found high levels of particle retention, raised percentages of free crystalline silica and mica in two patients, and free crystalline silica, kaolin and other silicates in the third. No evidence of any other contributory factor was found, suggesting that mixed mineral dust was the most probable cause. These observations suggest that exposure to mixed mineral dust should be added to the aetiology of anthracofibrosis.
Assuntos
Poluentes Ocupacionais do Ar/toxicidade , Antracossilicose/etiologia , Poeira , Fibras Minerais/toxicidade , Exposição Ocupacional/efeitos adversos , Fibrose Pulmonar/etiologia , Idoso , Humanos , MasculinoRESUMO
AIM OF THE STUDY: Splenic artery embolization has been used as an adjunct to the non-surgical management of blunt splenic injury. No consensus on its indications has emerged from the literature. This multicentric study aimed to evaluate the results of this technique in France. PATIENTS AND METHODS: Between March 2000 and April 2006, 22 patients older than 15 years of age (mean age 29, range: 15-59) with splenicv rupture due to blunt trauma underwent splenic artery embolization in six Level I Trauma Centers in France. Splenic rupture was classified Moore II in 3 cases, Moore III in 12 cases, and Moore IV in 7 cases. Angiography was performed within 4 hours of admission in half of the cases. The main indications for splenic artery embolization were: extravasation of contrast medium on CT scan (10 cases, 45%); early pseudo-aneurysm (6 cases, 23%); hypotension despite fluid resuscitation and/or progressive need for transfusion (5 cases, 22%). RESULTS: There was no mortality. Nine patients experienced complications (41%) including 6 (27%) who developed left pleural effusion. Two patients eventually underwent splenectomy (one for persistent hemorrhage, one for splenic necrosis). The overall splenic salvage rate was 91%. CONCLUSION: Splenic artery embolization is a valuable techniche that hels to lower the rate of splenectomy for traumatic splenic rupture with relatively low morbidity.
Assuntos
Embolização Terapêutica , Baço/lesões , Artéria Esplênica/lesões , Ferimentos não Penetrantes/terapia , Adolescente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos RetrospectivosRESUMO
UNLABELLED: Biliary injuries after laparoscopic cholecystectomy are rare but serious. Their mortality rate can reach 9%. AIM OF THE STUDY: Describe the management of biliary injuries after laparoscopic cholecystectomy in our center. PATIENTS: Between January 1995 and June 2005, 27 patients (13 women, 14 men) were treated. The mean age was 53 years old (range, 18-92 years). The biliary injuries were common bile duct sections (n=16, 60%), common bile duct stenoses (n=5, 18.5%), biliary fistulas from the cystic duct (n=4, 15%), and biliary fistulas from an aberrant biliary duct (n=2, 7.5%). RESULTS: Acute cholecystis was present in 40% of cases (n=11). An intraoperative cholangiography was done in 12 patients (44%). The mortality rate was 0%. Of the common bile duct sections, 43% were diagnosed during the cholecystectomy (n=7) or after the cholecystectomy within a mean of 11.2 days (n=9). Common bile duct injuries were treated in 16 cases with hepatojejunostomy and in five cases with an external biliary drain. Fistulas from the cystic duct were diagnosed within a mean 14.8 days. A fistula from an aberrant biliary duct was diagnosed during the cholecystectomy (n=1) or in the second postoperative day (n=1). Fistulas were treated with a clip on the cystic duct (n=2), an external biliary drain (n=1), a biliary endoprosthesis (n=1), and the biliary aberrant duct suture (n=2). CONCLUSION: Common bile duct injuries are a serious complication because their treatment is a hepaticojejunostomy in 75% of cases.
Assuntos
Colecistectomia Laparoscópica/efeitos adversos , Ducto Colédoco/lesões , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Fístula Biliar/etiologia , Fístula Biliar/terapia , Colangiografia/estatística & dados numéricos , Constrição Patológica/etiologia , Constrição Patológica/terapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos RetrospectivosRESUMO
An unusual uterus benign tumor, intravascular leiomyomatosis is also a differential diagnosis of uterine fibromas. It is most likely to be diagnosed post operatively and must be treated in an adequate way to avoid a recidive.