Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 925
Filtrar
Mais filtros

Intervalo de ano de publicação
1.
Cell ; 161(2): 199-200, 2015 Apr 09.
Artigo em Inglês | MEDLINE | ID: mdl-25860603

RESUMO

Benanti et al. report that Burkholderia pseudomallei and Burkholderia mallei bacteria express proteins that mimic Ena/Vasp family proteins to polymerize actin, thereby inducing actin-based motility. Thus, bacteria can use the various cellular actin polymerization mechanisms for intra- and inter-cellular dissemination.


Assuntos
Actinas/metabolismo , Infecções por Burkholderia/microbiologia , Burkholderia/fisiologia , Burkholderia/patogenicidade , Moléculas de Adesão Celular/metabolismo , Proteínas dos Microfilamentos/metabolismo , Fosfoproteínas/metabolismo , Animais , Humanos
2.
J Biol Chem ; 299(2): 102823, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36565989

RESUMO

The prion protein (PrPC) is subjected to several conserved endoproteolytic events producing bioactive fragments that are of increasing interest for their physiological functions and their implication in the pathogenesis of prion diseases and other neurodegenerative diseases. However, systematic and comprehensive investigations on the full spectrum of PrPC proteoforms have been hampered by the lack of methods able to identify all PrPC-derived proteoforms. Building on previous knowledge of PrPC endoproteolytic processing, we thus developed an optimized Western blot assay able to obtain the maximum information about PrPC constitutive processing and the relative abundance of PrPC proteoforms in a complex biological sample. This approach led to the concurrent identification of the whole spectrum of known endoproteolytic-derived PrPC proteoforms in brain homogenates, including C-terminal, N-terminal and, most importantly, shed PrPC-derived fragments. Endoproteolytic processing of PrPC was remarkably similar in the brain of widely used wild type and transgenic rodent models, with α-cleavage-derived C1 representing the most abundant proteoform and ADAM10-mediated shedding being an unexpectedly prominent proteolytic event. Interestingly, the relative amount of shed PrPC was higher in WT mice than in most other models. Our results indicate that constitutive endoproteolytic processing of PrPC is not affected by PrPC overexpression or host factors other than PrPC but can be impacted by PrPC primary structure. Finally, this method represents a crucial step in gaining insight into pathophysiological roles, biomarker suitability, and therapeutic potential of shed PrPC and for a comprehensive appraisal of PrPC proteoforms in therapies, drug screening, or in the progression of neurodegenerative diseases.


Assuntos
Western Blotting , Fragmentos de Peptídeos , Proteínas PrPC , Proteólise , Animais , Camundongos , Western Blotting/métodos , Doenças Priônicas/metabolismo , Doenças Priônicas/patologia , Doenças Priônicas/fisiopatologia , Proteínas PrPC/química , Proteínas PrPC/genética , Proteínas PrPC/metabolismo , Isoformas de Proteínas/química , Isoformas de Proteínas/genética , Isoformas de Proteínas/metabolismo , Fragmentos de Peptídeos/química , Fragmentos de Peptídeos/metabolismo , Encéfalo/metabolismo
3.
Am J Transplant ; 24(3): 362-379, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37871799

RESUMO

The Banff pancreas working schema for diagnosis and grading of rejection is widely used for treatment guidance and risk stratification in centers that perform pancreas allograft biopsies. Since the last update, various studies have provided additional insight regarding the application of the schema and enhanced our understanding of additional clinicopathologic entities. This update aims to clarify terminology and lesion description for T cell-mediated and antibody-mediated allograft rejections, in both active and chronic forms. In addition, morphologic and immunohistochemical tools are described to help distinguish rejection from nonrejection pathologies. For the first time, a clinicopathologic approach to islet pathology in the early and late posttransplant periods is discussed. This update also includes a discussion and recommendations on the utilization of endoscopic duodenal donor cuff biopsies as surrogates for pancreas biopsies in various clinical settings. Finally, an analysis and recommendations on the use of donor-derived cell-free DNA for monitoring pancreas graft recipients are provided. This multidisciplinary effort assesses the current role of pancreas allograft biopsies and offers practical guidelines that can be helpful to pancreas transplant practitioners as well as experienced pathologists and pathologists in training.


Assuntos
Transplante de Pâncreas , Transplante Homólogo , Biópsia , Isoanticorpos , Linfócitos T
4.
Fungal Genet Biol ; 172: 103894, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38657897

RESUMO

Inactivation of flbA in Aspergillus niger results in thinner cell walls, increased cell lysis, abolished sporulation, and an increased secretome complexity. A total of 36 transcription factor (TF) genes are differentially expressed in ΔflbA. Here, seven of these genes (abaA, aslA, aslB, azf1, htfA, nosA, and srbA) were inactivated. Inactivation of each of these genes affected sporulation and, with the exception of abaA, cell wall integrity and protein secretion. The impact on secretion was strongest in the case of ΔaslA and ΔaslB that showed increased pepsin, cellulase, and amylase activity. Biomass was reduced of agar cultures of ΔabaA, ΔaslA, ΔnosA, and ΔsrbA, while biomass was higher in liquid shaken cultures of ΔaslA and ΔaslB. The ΔaslA and ΔhtfA strains showed increased resistance to H2O2, while ΔaslB was more sensitive to this reactive oxygen species. Together, inactivation of the seven TF genes impacted biomass formation, sporulation, protein secretion, and stress resistance, and thereby these genes explain at least part of the pleiotropic phenotype of ΔflbA of A. niger.


Assuntos
Aspergillus niger , Parede Celular , Proteínas Fúngicas , Regulação Fúngica da Expressão Gênica , Fenótipo , Esporos Fúngicos , Fatores de Transcrição , Aspergillus niger/genética , Aspergillus niger/metabolismo , Aspergillus niger/crescimento & desenvolvimento , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Proteínas Fúngicas/genética , Proteínas Fúngicas/metabolismo , Regulação Fúngica da Expressão Gênica/genética , Esporos Fúngicos/genética , Esporos Fúngicos/crescimento & desenvolvimento , Parede Celular/metabolismo , Parede Celular/genética , Peróxido de Hidrogênio/farmacologia , Pleiotropia Genética
5.
PLoS Pathog ; 18(10): e1010900, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36206325

RESUMO

The role of the glycosylation status of PrPC in the conversion to its pathological counterpart and on cross-species transmission of prion strains has been widely discussed. Here, we assessed the effect on strain characteristics of bovine spongiform encephalopathy (BSE) isolates with different transmission histories upon propagation on a model expressing a non-glycosylated human PrPC. Bovine, ovine and porcine-passaged BSE, and variant Creutzfeldt-Jakob disease (vCJD) isolates were used as seeds/inocula in both in vitro and in vivo propagation assays using the non-glycosylated human PrPC-expressing mouse model (TgNN6h). After protein misfolding cyclic amplification (PMCA), all isolates maintained the biochemical characteristics of BSE. On bioassay, all PMCA-propagated BSE prions were readily transmitted to TgNN6h mice, in agreement with our previous in vitro results. TgNN6h mice reproduced the characteristic neuropathological and biochemical hallmarks of BSE, suggesting that the absence of glycans did not alter the pathobiological features of BSE prions. Moreover, back-passage of TgNN6h-adapted BSE prions to BoTg110 mice recovered the full BSE phenotype, confirming that the glycosylation of human PrPC is not essential for the preservation of the human transmission barrier for BSE prions or for the maintenance of BSE strain properties.


Assuntos
Síndrome de Creutzfeldt-Jakob , Encefalopatia Espongiforme Bovina , Príons , Animais , Ovinos , Bovinos , Camundongos , Humanos , Suínos , Encefalopatia Espongiforme Bovina/patologia , Camundongos Transgênicos , Encéfalo/patologia , Síndrome de Creutzfeldt-Jakob/patologia , Príons/metabolismo , Polissacarídeos/metabolismo , Carneiro Doméstico/metabolismo
6.
Neuropathol Appl Neurobiol ; 50(1): e12963, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38353056

RESUMO

AIM: CH1641 was discovered in 1970 as a scrapie isolate that was unlike all other classical strains of scrapie isolated so far. We performed bio-assays of CH1641 in mice in order to further characterise this specific isolate. METHODS: We inoculated the original CH1641 isolate into ovine and bovine prion protein (PrP) transgenic mice as well as wild-type mice. In addition, we performed cross- and back passages between the various mouse lines to examine if one identical prion strain was isolated in all mouse lines or whether multiple prion strains exist in CH1641. RESULTS: We report the first successful transmission of CH1641 to wild-type RIII mice and via RIII mice to wild-type VM mice. Unexpectedly, analysis of the protease-resistant prion protein (PrPres ) in wild-type mice showed a classical scrapie banding pattern differing from the banding pattern of the original CH1641 isolate. Cross- and back passages of CH1641 between the various mouse lines confirmed that the same prion strain had been isolated in all mouse lines. CONCLUSIONS: The CH1641 isolate consists of a single prion strain but its molecular banding pattern of PrPres differs between wild-type mice and PrP transgenic mice. Consequently, molecular banding patterns of PrPres should be used with caution in strain typing since they do not solely depend on the properties of the prion strain but also on the host prion protein.


Assuntos
Príons , Scrapie , Camundongos , Animais , Bovinos , Ovinos , Príons/metabolismo , Scrapie/metabolismo , Proteínas Priônicas/genética , Proteínas PrPSc/metabolismo , Camundongos Transgênicos
7.
Curr Opin Cardiol ; 39(4): 273-278, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38547158

RESUMO

PURPOSE OF REVIEW: Hypertension remains one of the most common clinical problems leading to significant posttransplant complications. This study reviews the pathophysiology of hypertension in the postcardiac transplant phase and provides an update on currently available antihypertensive therapies for heart transplant patients. RECENT FINDINGS: The true prevalence of hypertension in the heart transplant population remains unknown. Effective blood pressure (BP) control is key to prevent left ventricular remodeling, diastolic dysfunction and stroke. Calcium channel blockers (CCBs) are the most commonly and preferred agents in the early posttransplant phase and may have renal protective effects. Angiotensin-converting enzyme inhibitors (ACEIs), angiotensin receptor blockers (ARBs) can all be used as second line antihypertensive agents and may have a role in preventing other long-term complications such as calcineurin-inhibitor induced nephropathy. Although more data are needed, sodium-glucose co-transporter 2 inhibitors (SGLT2i) appeared to be well tolerated and could be considered especially in the presence of type diabetes and chronic kidney disease. Conversely, angiotensin receptor-neprilysin inhibition (ARNI) have not been studied in the heart transplant population therefore cannot be recommended at this time. SUMMARY: Hypertension is very common after heart transplant. Early steroid wean and traditional risk factor modification play an important part in the management of post-heart transplant hypertension. CCB, ACEI, ARB are the preferred antihypertensive agents to improve postcardiac transplant complications. Novel therapies such as SGLT2i appear well tolerated and may have benefits in both BP and glycemic control in heart transplant; however, larger trials are needed.


Assuntos
Anti-Hipertensivos , Transplante de Coração , Hipertensão , Humanos , Transplante de Coração/efeitos adversos , Hipertensão/tratamento farmacológico , Hipertensão/etiologia , Anti-Hipertensivos/uso terapêutico , Antagonistas de Receptores de Angiotensina/uso terapêutico , Complicações Pós-Operatórias/prevenção & controle , Complicações Pós-Operatórias/etiologia , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico
8.
Vet Res ; 55(1): 62, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38750594

RESUMO

The first case of CWD in a Norwegian red deer was detected by a routine ELISA test and confirmed by western blotting and immunohistochemistry in the brain stem of the animal. Two different western blotting tests were conducted independently in two different laboratories, showing that the red deer glycoprofile was different from the Norwegian CWD reindeer and CWD moose and from North American CWD. The isolate showed nevertheless features similar to the classical BSE (BSE-C) strain. Furthermore, BSE-C could not be excluded based on the PrPSc immunohistochemistry staining in the brainstem and the absence of detectable PrPSc in the lymphoid tissues. Because of the known ability of BSE-C to cross species barriers as well as its zoonotic potential, the CWD red deer isolate was submitted to the EURL Strain Typing Expert Group (STEG) as a BSE-C suspect for further investigation. In addition, different strain typing in vivo and in vitro strategies aiming at identifying the BSE-C strain in the red deer isolate were performed independently in three research groups and BSE-C was not found in it. These results suggest that the Norwegian CWD red deer case was infected with a previously unknown CWD type and further investigation is needed to determine the characteristics of this potential new CWD strain.


Assuntos
Cervos , Encefalopatia Espongiforme Bovina , Doença de Emaciação Crônica , Animais , Noruega , Western Blotting/veterinária , Ensaio de Imunoadsorção Enzimática/veterinária , Príons/metabolismo , Bovinos , Imuno-Histoquímica/veterinária , Proteínas PrPSc/metabolismo
9.
Antonie Van Leeuwenhoek ; 117(1): 58, 2024 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-38502333

RESUMO

Genes flbA-E are involved in sporulation and vegetative growth in Aspergillus nidulans. Inactivation of either of these genes results in a fluffy phenotype with delayed or even abolished sporulation. Previously, a non-sporulating phenotype was obtained by inactivating flbA in Aspergillus niger, which was accompanied by lysis, thinner cell walls, and an increased secretome complexity. Here, we further studied the role of the flb genes of A. niger. Strains ΔflbA, ΔflbB and ΔflbE showed increased biomass formation, while inactivation of flbA-D reduced, or even abolished, formation of conidia. Strain ΔflbA was more sensitive to H2O2, DTT, and the cell wall integrity stress compounds SDS and Congo Red (CR). Also, ΔflbC was more sensitive to SDS, while ΔflbB, ΔflbD, and ΔflbE were more sensitive to CR. On the other hand, inactivation of flbE increased resistance to H2O2. Enzyme secretion was impacted when the Δflb strains were grown on xylose. Strain ΔflbE showed reduced xylanase, cellulase and amylase secretion. On the other hand, amylase secretion at the periphery of the ΔflbA colony was reduced but not in its center, while secretion of this enzyme was increased in the center of the ΔflbB colony but not at its periphery. Inactivation of flbC and flbD also impacted zonal cellulase and amylase activity. Together, the Flb protein family of A. niger function in biomass formation, sporulation, stress response, and protein secretion.


Assuntos
Aspergillus niger , Celulases , Animais , Aspergillus niger/metabolismo , Proteínas Fúngicas/genética , Proteínas Fúngicas/metabolismo , Peróxido de Hidrogênio/metabolismo , Estágios do Ciclo de Vida , Celulases/metabolismo , Amilases/metabolismo , Esporos Fúngicos
10.
Int J Neurosci ; : 1-7, 2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38294709

RESUMO

PURPOSE: To examine the link between tremor and sex chromosome abnormalities, emphasizing the necessity of comprehensive physical examination. CASE DESCRIPTION: An 18-year-old man exhibited an isolated action tremor in both hands. Despite having no familial history of tremors and no identifiable secondary causes, his tall stature and learning difficulties suggested a genetic origin. His karyotype confirmed the diagnosis of Jacob's syndrome (XYY syndrome). Therapies with primidone and propranolol were ineffective for his tremor. CONCLUSIONS: Tremor can be caused by various conditions, and aneuploidies might often be overlooked as a cause. They should be considered in young patients with concrete phenotypes and negative familiar history of tremors. Karyotyping is a cost-effective diagnostic tool crucial for genetic counselling. Common treatments for tremors often yield unsatisfactory results in these cases.

11.
Int J Mol Sci ; 25(8)2024 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-38673884

RESUMO

The p.Arg301Gln variant in the α -galactosidase A gene (GLA) has been poorly described in the literature. The few reports show controversial information, with both classical and nonclassical Anderson-Fabry Disease (AFD) presentation patterns. The aim of this study was to analyze the penetrance, clinical phenotype, and biochemical profile of an international cohort of patients carrying the p.Arg301Gln genetic variant in the GLA gene. This was an observational, international, and retrospective cohort case series study of patients carrying the p.Arg301Gln variant in the GLA gene associated with AFD disease. Forty-nine p.Arg301Gln GLA carriers, 41% male, were analyzed. The penetrance was 63% in the entire cohort and 1.5 times higher in men. The mean age of symptoms onset was 41 years; compared to women, men presented symptoms earlier and with a shorter delay to diagnosis. The typical clinical triad-cornea verticillate, neuropathic pain, and angiokeratomas-affected only 20% of the cohort, with no differences between genders. During follow-up, almost 20% of the patients presented some type of nonfatal cardiovascular and renal event (stroke, need for dialysis, heart failure, and arrhythmias requiring intracardiac devices), predominantly affecting men. Residual levels were the most common finding of α-GAL A enzyme activity, only a few women had a normal level; a small proportion of men had undetectable levels. The incidence of combined outcomes including all causes of death was 33%, and the cumulative incidence of all-cause mortality was 9% at the follow-up. Patients carrying the p.Arg301Gln GLA variant have a high penetrance, with predominantly cardiorenal involvement and clinical onset of the disease in middle age. Only a small proportion showed the classic clinical presentation of AFD. As in other X-linked diseases, males were more affected by severe cardiovascular and renal events. This genotype-phenotype correlation could be useful from a practical clinical point of view and for future decision making.


Assuntos
Doença de Fabry , Fenótipo , alfa-Galactosidase , Humanos , Doença de Fabry/genética , Masculino , alfa-Galactosidase/genética , Feminino , Pessoa de Meia-Idade , Adulto , Estudos Retrospectivos , Idoso , Penetrância
12.
BMC Nurs ; 23(1): 28, 2024 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-38195560

RESUMO

BACKGROUND: Dating Violence (DV) is a type of Intimate Partner Violence that occurs between young people, and they are those behaviours that cause physical, sexual or psychological harm. OBJECTIVE/AIM: To know the experience of university students around dating violence. DESIGN AND METHODS: Qualitative study with a phenomenological approach was conducted through semi-structured individual interviews with nursing students' victims of dating violence with the same starting categories. The public involve in this study were nursing students who freely agreed to participate in the interviews and gave their informed consent. RESULTS: Eleven nursing students participated, the sample was heterogeneous for gender and sexual diversity. Obtaining results about their experience with dating violence, manifestations of dating violence and cyber violence in their relationships, consequences, formal and informal help seeking and proposals for help as nursing students, among others. CONCLUSION: Dating violence is a serious problem that seriously affects the victims and requires the creation of prevention programs. The experiences of university students about DV are mainly painful experiences, with serious consequences for those involved, needing help from their close environment and professional help to overcome the problems generated by their partners. IMPLICATIONS: It is important due to the high prevalence of this phenomenon, also among nursing students, to provide key points to future health professionals and victims of dating violence on the correct way to act against violence due to lack of knowledge on the subject. This study clarifies the experiences of dating violence and how to offer help to victims from the informal and professional sphere. TRIAL REGISTRATION: This study was approved by the Ethics Committee of Clinical Research of the Health Area of Talavera de la Reina (Toledo) with code 01/2021.

13.
Trop Anim Health Prod ; 56(3): 117, 2024 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-38568238

RESUMO

Cereals such as triticale may contain high levels of xylans and arabinoxylans, limiting its use in diets since they act as anti-nutritional factors. The objective was to evaluate the effects of the enzyme xylanase included in triticale-based diets on productive performance, digestibility, carcass traits and meat quality in growing-finishing rabbits. Eighty rabbits (New Zealand X California breed), 35 days old, with an average initial live weight of 821 ± 26 g, were used. Twenty animals for treatment were used in each one of the fourth experimental treatments: 0, 4000, 8000 and 12,000 XU/kg of xylanase inclusion (XilaBlend 6X). The rabbits were fed ad libitum and fecal excretion was collected on days 7, 14, 21, 28 and 35 of the experimental period. At the end of the experimental period, the rabbits were slaughtered and carcass characteristics and meat quality were measured. A higher (P < 0.05) live weight was observed in rabbits fed diets with the addition of xylanase enzyme on days 4 and 7 of the experimental period. On the other hand, in the average total tract digestibility of organic matter, no significant difference was observed, similar to what occurred in the carcass traits and nutritional quality of the meat. The inclusion of 8000 XU/kg of xylanase enzyme provided the best values of apparent digestibility of total tract protein and dry matter on the finished stage of rabbits.


Assuntos
Triticale , Animais , Coelhos , Melhoramento Vegetal , Dieta/veterinária , Suplementos Nutricionais , Carne
14.
Prague Med Rep ; 125(2): 146-150, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38761047

RESUMO

We present a case of obstruction in the third portion of the duodenum secondary to a phytobezoar in an adult patient with no surgical history and without a vegan diet. High intestinal obstruction due to a phytobezoar is rarely described in the literature, posing a diagnostic challenge when evaluating potential differentials in the emergency setting. Subsequently, we conduct a review focusing on tomographic findings and the surgical specimen, highlighting key points to consider when addressing such pathologies.


Assuntos
Bezoares , Humanos , Masculino , Pessoa de Meia-Idade , Bezoares/cirurgia , Bezoares/diagnóstico , Obstrução Duodenal/etiologia , Obstrução Duodenal/diagnóstico , Obstrução Duodenal/cirurgia , Duodeno , Tomografia Computadorizada por Raios X
15.
Eur J Orthop Surg Traumatol ; 34(1): 271-277, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37452136

RESUMO

PURPOSE: The usefulness of closed suction drains (CSD) after open reduction and internal fixation (ORIF) of tibial plateau fractures is a contested topic. The purpose of this study was to examine the impact of CSD in postoperative outcomes after tibial plateau fracture. METHODS: Data were retrospectively collected from patients who underwent primary repair of closed tibial plateau fractures via an anterolateral approach between June 2021 to May 2022 at a single academic center. Fifty-six patients were included and 28 received CSDs at time of surgery. P values less than 0.05 were considered significant. RESULTS: Fifty-six patients were included. There was no significant difference in demographics, pre- and post-op hemoglobin, estimated blood loss during surgery, length of stay, postoperative MMEs and pain at 3 month follow-up, deep vein thrombosis (DVT), compartment syndrome, flexion contracture, use of incisional vac, infection rate, wound drainage, hematoma, neurologic pain, dehiscence, additional surgery, or range of motion at 3 months follow-up. We noted a significant difference in Defense and Veterans Pain Rating Scale (DVPRS) on POD1, demonstrating greater pain in those in the CSD group. CONCLUSION: Our findings suggest that the use of CSD in ORIF of tibial plateau fractures may not be of significant prophylactic benefit. CSDs in ORIF patients were associated with increased early postoperative pain and had no identifiable benefits. LEVEL OF EVIDENCE: III.


Assuntos
Fraturas da Tíbia , Fraturas do Planalto Tibial , Humanos , Sucção , Estudos Retrospectivos , Fixação Interna de Fraturas/efeitos adversos , Fraturas da Tíbia/cirurgia , Redução Aberta/efeitos adversos , Dor Pós-Operatória/etiologia , Dor Pós-Operatória/prevenção & controle , Resultado do Tratamento
16.
Liver Transpl ; 29(10): 1100-1108, 2023 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-36929835

RESUMO

To address the feasibility of implementing a lung cancer screening program in liver transplant recipients (LTR) targeted to detect early-stage lung cancer one hundred twenty-four LTR (89% male, 59.8+/-8.8 y old), who entered the lung cancer screening program at our hospital were reviewed. The results of the diagnostic algorithm using low-dose CT and F-18-fluorodeoxyglycose positron emission tomography (FDG-PET) were analyzed. Lung cancer was detected in 12 LTR (9.7%), most of which corresponded to the non-small cell subtype. Two of the 12 lung cancers were detected in the baseline study (prevalence of 1.6%), whereas 10 patients were diagnosed with lung cancer in the follow-up (incidence of 8.1%). Considering all cancers, 10 of 12 (83.3%) were diagnosed at stage I, one cancer was diagnosed at stage IIIA, and another one at stage IV. The sensitivity, specificity, diagnostic accuracy, and positive and negative predictive values of F-18-fluorodeoxyglycose positron emission tomography to detect malignancy in our cohort were 81.8%,100%, 99.3%, 100%, and 99.3%, respectively. A carefully followed multidisciplinary lung cancer screening algorithm in LTR that includes F-18-fluorodeoxyglycose positron emission tomography and low-dose CT allows lung cancer to be diagnosed at an early stage while reducing unnecessary invasive procedures.


Assuntos
Transplante de Fígado , Neoplasias Pulmonares , Humanos , Masculino , Feminino , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/epidemiologia , Neoplasias Pulmonares/cirurgia , Fluordesoxiglucose F18 , Detecção Precoce de Câncer/métodos , Transplante de Fígado/efeitos adversos , Compostos Radiofarmacêuticos , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Estudos Retrospectivos
17.
Vet Res ; 54(1): 98, 2023 Oct 20.
Artigo em Inglês | MEDLINE | ID: mdl-37864218

RESUMO

Classical bovine spongiform encephalopathy (BSE) in cattle was caused by the recycling and feeding of meat and bone meal contaminated with a transmissible spongiform encephalopathy (TSE) agent but its origin remains unknown. This study aimed to determine whether atypical scrapie could cause disease in cattle and to compare it with other known TSEs in cattle. Two groups of calves (five and two) were intracerebrally inoculated with atypical scrapie brain homogenate from two sheep with atypical scrapie. Controls were five calves intracerebrally inoculated with saline solution and one non-inoculated animal. Cattle were clinically monitored until clinical end-stage or at least 96 months post-inoculation (mpi). After euthanasia, tissues were collected for TSE diagnosis and potential transgenic mouse bioassay. One animal was culled with BSE-like clinical signs at 48 mpi. The other cattle either developed intercurrent diseases leading to cull or remained clinical unremarkable at study endpoint, including control cattle. None of the animals tested positive for TSEs by Western immunoblot and immunohistochemistry. Bioassay of brain samples from the clinical suspect in Ov-Tg338 and Bov-Tg110 mice was also negative. By contrast, protein misfolding cyclic amplification detected prions in the examined brains from atypical scrapie-challenged cattle, which had a classical BSE-like phenotype. This study demonstrates for the first time that a TSE agent with BSE-like properties can be amplified in cattle inoculated with atypical scrapie brain homogenate.


Assuntos
Doenças dos Bovinos , Encefalopatia Espongiforme Bovina , Príons , Scrapie , Doenças dos Ovinos , Ovinos , Animais , Bovinos , Camundongos , Scrapie/metabolismo , Príons/genética , Encefalopatia Espongiforme Bovina/metabolismo , Encéfalo/metabolismo , Camundongos Transgênicos , Doenças dos Bovinos/metabolismo , Doenças dos Ovinos/diagnóstico
18.
Antonie Van Leeuwenhoek ; 116(9): 867-882, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37316742

RESUMO

Aspergillus niger is widely used as a cell factory for the industrial production of enzymes. Previously, it was shown that deletion of α-1-3 glucan synthase genes results in smaller micro-colonies in liquid cultures of Aspergillus nidulans. Also, it has been shown that small wild-type Aspergillus niger micro-colonies secrete more protein than large mirco-colonies. We here assessed whether deletion of the agsC or agsE α-1-3 glucan synthase genes results in smaller A. niger micro-colonies and whether this is accompanied by a change in protein secretion. Biomass formation was not affected in the deletion strains but pH of the culture medium had changed from 5.2 in the case of the wild-type to 4.6 and 6.4 for ΔagsC and ΔagsE, respectively. The diameter of the ΔagsC micro-colonies was not affected in liquid cultures. In contrast, diameter of the ΔagsE micro-colonies was reduced from 3304 ± 338 µm to 1229 ± 113 µm. Moreover, the ΔagsE secretome was affected with 54 and 36 unique proteins with a predicted signal peptide in the culture medium of MA234.1 and the ΔagsE, respectively. Results show that these strains have complementary cellulase activity and thus may have complementary activity on plant biomass degradation. Together, α-1-3 glucan synthesis (in)directly impacts protein secretion in A. niger.


Assuntos
Aspergillus niger , Secretoma , Aspergillus niger/genética , Aspergillus niger/metabolismo , Glucosiltransferases/genética , Glucosiltransferases/metabolismo , Proteínas Fúngicas/genética , Proteínas Fúngicas/metabolismo
19.
Eur J Pediatr ; 182(11): 5131-5136, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37684486

RESUMO

Universal congenital cytomegalovirus (cCMV) screening in saliva is increasingly recommended. The aim of our study was to correlate the performance of a point-of-care rapid molecular test with CMV real time PCR (CMV RT-PCR) detection, using saliva pool-testing in newborns under a universal screening strategy. Saliva swabs were prospectively collected from newborns < 21 days old and tested by Alethia-LAMP-CMV assay in pools of 5 samples. In positive pools, subjects were tested individually and by saliva and urine CMV RT-PCR. A subset of negative pools were studied with both techniques and viral loads in whole blood were determined in positive patients. From 1,642 newborns included in 328 pools, 8 were confirmed by urine CMV RT-PCR, (cCMV prevalence 0,49%). The PPA and NNA of the pooled saliva Alethia-LAMP-CMV testing were 87,5% and 99,8% with a negative and positive predictive value of 99,9% and 77,7%, respectively. Two false positives were detected (0,12%). A subset of 17 negative pools (85 samples), studied by saliva CMV RT-PCR, showed 100% concordance.  Conclusion: CMV pool-testing using a rapid molecular test in saliva proved feasible when compared to PCR gold standards. This strategy could improve cost-effectiveness for cCMV universal neonatal screening, based on the low prevalence of the infection and could be a more affordable approach in less developed regions with reduced detection capacity. What is Known: • cCMV is the most frequent congenital infection and a leading nongenetic cause of sensorineural hearing loss and brain disease. • Universal screening could allow early detection of congenitally infected infants, improving clinical outcome. • Saliva PCR is the preferred and non-invasive test for newborn cCMV screening. What is New: • The feasibility of a universal cCMV screening by pool-testing in saliva using a rapid test in pools of 5 samples. • PPA and NPA were 87,5 and 99,8% compared to CMV PCR in urine. • This strategy could be relevant specially in LMIC where detection capacity is reduced and could improve cost-effectiveness. • cCMV prevalence in our center was 0,49%.


Assuntos
Infecções por Citomegalovirus , Citomegalovirus , Lactente , Humanos , Recém-Nascido , Citomegalovirus/genética , Saliva , Infecções por Citomegalovirus/diagnóstico , Triagem Neonatal/métodos , Reação em Cadeia da Polimerase em Tempo Real/métodos
20.
Langenbecks Arch Surg ; 408(1): 196, 2023 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-37191721

RESUMO

BACKGROUND: Simultaneous pancreas-kidney transplantation (SPK) is still characterized by high rates of postoperative complications. This study aims to offer an in-depth characterization of early, medium-term, and late complications following SPK to derive insights for postoperative management and follow-up. METHODS: Consecutive SPK transplantations were analysed. Pancreatic graft (P-graft)- and kidney graft (K-graft)-related complications were analysed separately. The global postoperative course was assessed in three timeframes (early, medium-term, and late) using the comprehensive complication index (CCI). Predictors of complications and early graft loss were explored. RESULTS: Complications occurred in 61.2% of patients, and the 90-day mortality was 3.9%. The overall burden of complications was significantly high during admission (CCI 22.4 ± 21.1) and decreased gradually afterwards. P-graft-related complications burdened the most in the early postoperative course (CCI 11.6 ± 13.8); postoperative ileus and perigraft fluid collection were the most frequent complications, and pseudoaneurysms, haemorrhages, and bowel leaks were the major concerns. K-related complications were milder but represented the largest proportion of the CCI in the late postoperative timeframe (CCI 7.6 ± 13.6). No predictors of P-graft- or K-graft-related complications were found. CONCLUSION: Pancreas graft-related complications represent the largest part of the clinical burden in the early postoperative timeframe but are negligible after 3 months. Kidney grafts have a relevant impact in the long term. The multidisciplinary approach to SPK recipients should be driven based on all graft-specific complications and tailored on a time-dependent basis.


Assuntos
Diabetes Mellitus Tipo 1 , Transplante de Rim , Transplante de Pâncreas , Humanos , Transplante de Rim/efeitos adversos , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Pâncreas , Transplante de Pâncreas/efeitos adversos , Sobrevivência de Enxerto
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA