Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 50
Filtrar
1.
Nat Immunol ; 25(9): 1678-1691, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39060650

RESUMO

Whole-exome sequencing of two unrelated kindreds with systemic autoimmune disease featuring antinuclear antibodies with IgG4 elevation uncovered an identical ultrarare heterozygous TNIP1Q333P variant segregating with disease. Mice with the orthologous Q346P variant developed antinuclear autoantibodies, salivary gland inflammation, elevated IgG2c, spontaneous germinal centers and expansion of age-associated B cells, plasma cells and follicular and extrafollicular helper T cells. B cell phenotypes were cell-autonomous and rescued by ablation of Toll-like receptor 7 (TLR7) or MyD88. The variant increased interferon-ß without altering nuclear factor kappa-light-chain-enhancer of activated B cells signaling, and impaired MyD88 and IRAK1 recruitment to autophagosomes. Additionally, the Q333P variant impaired TNIP1 localization to damaged mitochondria and mitophagosome formation. Damaged mitochondria were abundant in the salivary epithelial cells of Tnip1Q346P mice. These findings suggest that TNIP1-mediated autoimmunity may be a consequence of increased TLR7 signaling due to impaired recruitment of downstream signaling molecules and damaged mitochondria to autophagosomes and may thus respond to TLR7-targeted therapeutics.


Assuntos
Doenças Autoimunes , Proteínas de Ligação a DNA , Imunoglobulina G , Fator 88 de Diferenciação Mieloide , Receptor 7 Toll-Like , Animais , Imunoglobulina G/imunologia , Imunoglobulina G/metabolismo , Humanos , Receptor 7 Toll-Like/metabolismo , Receptor 7 Toll-Like/genética , Receptor 7 Toll-Like/imunologia , Camundongos , Fator 88 de Diferenciação Mieloide/metabolismo , Fator 88 de Diferenciação Mieloide/genética , Doenças Autoimunes/imunologia , Doenças Autoimunes/genética , Proteínas de Ligação a DNA/metabolismo , Proteínas de Ligação a DNA/genética , Feminino , Masculino , Transdução de Sinais , Mitocôndrias/metabolismo , Sequenciamento do Exoma , Anticorpos Antinucleares/imunologia , Linfócitos B/imunologia , Camundongos Knockout , Camundongos Endogâmicos C57BL , Centro Germinativo/imunologia , Linhagem , Glândulas Salivares/imunologia , Glândulas Salivares/metabolismo , Glândulas Salivares/patologia , Glicoproteínas de Membrana
2.
Am J Hum Genet ; 107(2): 175-182, 2020 08 06.
Artigo em Inglês | MEDLINE | ID: mdl-32763188

RESUMO

Expanded carrier screening (ECS) for recessive monogenic diseases requires prior knowledge of genomic variation, including DNA variants that cause disease. The composition of pathogenic variants differs greatly among human populations, but historically, research about monogenic diseases has focused mainly on people with European ancestry. By comparison, less is known about pathogenic DNA variants in people from other parts of the world. Consequently, inclusion of currently underrepresented Indigenous and other minority population groups in genomic research is essential to enable equitable outcomes in ECS and other areas of genomic medicine. Here, we discuss this issue in relation to the implementation of ECS in Australia, which is currently being evaluated as part of the national Government's Genomics Health Futures Mission. We argue that significant effort is required to build an evidence base and genomic reference data so that ECS can bring significant clinical benefit for many Aboriginal and/or Torres Strait Islander Australians. These efforts are essential steps to achieving the Australian Government's objectives and its commitment "to leveraging the benefits of genomics in the health system for all Australians." They require culturally safe, community-led research and community involvement embedded within national health and medical genomics programs to ensure that new knowledge is integrated into medicine and health services in ways that address the specific and articulated cultural and health needs of Indigenous people. Until this occurs, people who do not have European ancestry are at risk of being, in relative terms, further disadvantaged.


Assuntos
Metagenômica/métodos , Grupos Populacionais/genética , Austrália , Variação Genética/genética , Humanos
3.
Dermatol Online J ; 29(2)2023 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-37220289

RESUMO

Dermatomyositis is an inflammatory myopathy involving the skin that typically affects patients between 40-60 years of age and is more likely to be diagnosed in women. Around 10-20% of dermatomyositis cases present with subclinical or absent muscle involvement, termed "clinically amyopathic." Presence of anti-transcription intermediary factor 1? (TIF1?) antibodies is an important indicator of underlying malignancy. We present a patient with anti-TIF1? positive amyopathic dermatomyositis associated with bilateral breast cancer. The patient was safely treated with trastuzumab for breast cancer and intravenous immunoglobulin for dermatomyositis.


Assuntos
Neoplasias da Mama , Dermatomiosite , Humanos , Feminino , Imunoglobulinas Intravenosas , Pele
4.
Br J Dermatol ; 187(3): 417-419, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35192196

RESUMO

In this case series, ustekinumab therapy demonstrated efficacy in some patients with severe hidradenitis suppurativa previously treated with adalimumab and/or infliximab. Larger prospective studies are needed to evaluate ustekinumab as a treatment option for recalcitrant hidradenitis suppurativa.


Assuntos
Fármacos Dermatológicos , Hidradenite Supurativa , Adalimumab/uso terapêutico , Fármacos Dermatológicos/uso terapêutico , Hidradenite Supurativa/tratamento farmacológico , Humanos , Infliximab/uso terapêutico , Ustekinumab/uso terapêutico
5.
Lupus ; 30(11): 1756-1763, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34266320

RESUMO

OBJECTIVE: To compare the frequency of rare variants in genes of the pathophysiologically relevant endosomal Toll-like receptor (eTLR) pathway and any quantifiable differences in variant rarity, predicted deleteriousness, or molecular proximity in patients with systemic lupus erythematosus (SLE) and healthy controls. PATIENTS AND METHODS: 65 genes associated with the eTLR pathway were identified by literature search and pathway analysis. Using next generation sequencing techniques, these were compared in two randomised cohorts of patients with SLE (n = 114 and n = 113) with 197 healthy controls. Genetically determined ethnicity was used to normalise minor allele frequencies (MAF) for the identified genetic variants and these were then compared by their frequency: rare (MAF < 0.005), uncommon (MAF 0.005-0.02), and common (MAF >0.02). This was compared to the results for 65 randomly selected genes. RESULTS: Patients with SLE are more likely to carry a rare nonsynonymous variant affecting proteins within the eTLR pathway than healthy controls. Furthermore, individuals with SLE are more likely to have multiple rare variants in this pathway. There were no differences in rarity, Combined Annotation Dependent Depletion (CADD) score, or molecular proximity for rare eTLR pathway variants. CONCLUSIONS: Rare non-synonymous variants are enriched in patients with SLE in the eTLR pathway. This supports the hypothesis that SLE arises from several rare variants of relatively large effect rather than many common variants of small effect.


Assuntos
Lúpus Eritematoso Sistêmico , Receptores Toll-Like , Endossomos/genética , Frequência do Gene , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Lúpus Eritematoso Sistêmico/genética , Mutação , Receptores Toll-Like/genética
6.
Immunol Cell Biol ; 98(6): 490-499, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32315078

RESUMO

Autoimmune disease is a substantial cause of morbidity and is strongly influenced by genetic risk. Extensive efforts have characterized the overall genetic basis of many autoimmune diseases, typically by investigation of common variants. While these common variants have modest effects and may cumulatively predispose to disease, it is also increasingly apparent that rare variants have significantly greater effect on phenotype and are likely to contribute to autoimmune disease. Recent advances have illustrated the next fundamental step in elucidating the genetic basis of autoimmunity, moving beyond association to demonstrate the functional consequences of these variants.


Assuntos
Doenças Autoimunes , Doenças Autoimunes/genética , Autoimunidade , Predisposição Genética para Doença , Humanos , Fenótipo
7.
J Pathol ; 248(1): 9-15, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30684265

RESUMO

Acute kidney injury (AKI) remains a global challenge and, despite the availability of dialysis and transplantation, can be fatal. Those that survive an AKI are at increased risk of developing chronic kidney disease and end stage renal failure. Understanding the fundamental mechanisms underpinning the pathophysiology of AKI is critical for developing novel strategies for diagnosis and treatment. A growing body of evidence indicates that amplifying type 2 immunity may have therapeutic potential in kidney injury and disease. Of particular interest are the recently described subset of innate immune cells, termed group 2 innate lymphoid cells (ILCs). Group 2 ILCs are crucial tissue-resident immune cells that maintain homeostasis and regulate tissue repair at multiple organ sites, including the kidney. They are critical mediators of type 2 immune responses following infection and injury. The existing literature suggests that activation of group 2 ILCs and production of a local type 2 immune milieu is protective against renal injury and associated pathology. In this review, we describe the emerging role for group 2 ILCs in renal homeostasis and repair. We provide an in-depth discussion of the most recent literature that use preclinical models of AKI and assess the therapeutic effect of modulating group 2 ILC function. We debate the potential for targeting these cells as novel cellular therapies in AKI and discuss the implications for future studies and translation. Copyright © 2019 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.


Assuntos
Injúria Renal Aguda/imunologia , Injúria Renal Aguda/terapia , Subpopulações de Linfócitos/imunologia , Imunidade Adaptativa/imunologia , Animais , Terapia Baseada em Transplante de Células e Tecidos/métodos , Modelos Animais de Doenças , Humanos , Imunidade Inata/imunologia , Interleucina-33/uso terapêutico , Ativação Linfocitária/imunologia , Subpopulações de Linfócitos/transplante , Camundongos
8.
Cochrane Database Syst Rev ; 12: CD011393, 2020 12 07.
Artigo em Inglês | MEDLINE | ID: mdl-33283264

RESUMO

BACKGROUND: Itch in patients with chronic kidney disease (CKD) is common, often very distressing and associated with depression, reduced quality of life, and increased death. The most common first-line treatment has been the use of antihistamines despite the lack of substantial evidence for its use for uraemic itch. Few recommendations and guidelines exist for treatment. OBJECTIVES: We aimed to determine: 1) the benefits and harms (both absolute and relative) of all topical and systemic interventions for the treatment of uraemic itch, either alone or in combination, when compared with placebo or standard care; and, 2) the dose strength or frequency, stage of kidney disease or method of dialysis used (where applicable) in cases where the effects of these interventions vary depending on co-interventions. SEARCH METHODS: We searched the Cochrane Kidney and Transplant Register of Studies up to 17 December 2019 through contact with the Information Specialist using search terms relevant to this review. Studies in the Register are identified through searches of CENTRAL, MEDLINE, and EMBASE, conference proceedings, the International Clinical Trials Register (ICTRP) Search Portal and ClinicalTrials.gov. SELECTION CRITERIA: Randomised controlled trials (RCTs) in adults with CKD stages 4 or 5 comparing treatments (pharmacological, topical, exposure, dialysis modality) for CKD associated itch to either placebo or other established treatments. DATA COLLECTION AND ANALYSIS: Two authors independently abstracted study data and assessed study quality. Data were analysed using a random effects meta-analysis design estimating the relative effects of treatment versus placebo. Estimates of the relative effects between treatments are included where possible. For continuous measures of severity of itch up to three months, mean difference (MD) or standardised mean difference (SMD) were used. When reported, adverse effects were tabulated. The certainty of the evidence was estimated using GRADE. MAIN RESULTS: Ninety-two RCTs, randomising 4466 participants were included. Fifty-eight studies (3285 participants) provided sufficient data to be meta-analysed. Of these, 30 compared an intervention to a placebo or control. The 10 cm Visual Analogue Scale (VAS) was the dominant instrument utilized for itch reporting and the Duo score was used in a minority of studies. GABA analogues including, gabapentin and pregabalin, reduce itch in patients with CKD (5 studies, 297 participants: 4.95 cm reduction, 95% CI 5.46 to 4.44 lower in VAS compared to placebo; high certainty evidence). Kappa opioid agonists, including nalfurafine also reduced itch in this population (6 studies, 661 participants: 1.05 cm reduction, 95% CI 1.40 to 0.71 lower in VAS compared to placebo; high certainty evidence). Ondansetron had little or no effect on itch scores (3 studies, 183 participants: 0.38 cm reduction, 95% CI 1.04 lower to 0.29 higher in VAS compared to placebo; high certainty evidence). Reduction in the severity of itch was reported with oral montelukast, turmeric, zinc sulfate and topical capsaicin. For all other interventions, the certainty of the evidence was low to moderate, and the interventions had uncertain effects on uraemic pruritus. Six studies have disclosed significant financial support from their respective manufacturers, six were affected by lack of blinding, and 11 studies have 15 participants or less. Older, smaller RCTs often failed to follow intention-to-treat protocols with unexplained dropouts after randomisation. Adverse effects were generally poorly and inconsistently reported across all RCTs. No severe adverse events were reported for any intervention. AUTHORS' CONCLUSIONS: The RCTs of this meta-analysis contain a large array of interventions with a diverse set of comparators. For many interventions, trials are sparse. This served to make informative meta-analysis challenging. Of all treatments for uraemic pruritus, gabapentinoids (gabapentin and pregabalin) were the most studied and show the greatest reduction in itch scores. Further RCTs, even of the scale of the largest trials included in this review, are unlikely to significantly change this finding. Kappa-opioid agonists (mainly nalfurafine) also may reduce itch, but indirect comparison suggests a much more modest effect in comparison to GABA analogues. Evidence for oral montelukast, turmeric, zinc sulfate, and topical capsaicin also showed an itch score reduction. However, these reductions were reported in small studies, and warrant further investigation. Ondansetron did not reduce itch. It is somewhat unlikely that a further study of ondansetron will change this result.


Assuntos
Analgésicos/uso terapêutico , Antipruriginosos/uso terapêutico , Prurido/tratamento farmacológico , Insuficiência Renal Crônica/complicações , Humanos , Prurido/etiologia , Ensaios Clínicos Controlados Aleatórios como Assunto , Diálise Renal/métodos , Insuficiência Renal Crônica/terapia
9.
Aust Prescr ; 43(3): 85-90, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32675909

RESUMO

Systemic lupus erythematosus should be suspected in individuals with one or more classic symptoms. Diagnosis is made clinically and supported by serology Reducing sun exposure is central to the management of lupus Hydroxychloroquine is first-line treatment unless contraindicated and is useful in almost all manifestations of lupus. Other treatments are titrated against type and severity of organ involvement Monoclonal antibodies have a limited role in the management of lupus

13.
Cochrane Database Syst Rev ; 10: CD011953, 2017 10 26.
Artigo em Inglês | MEDLINE | ID: mdl-29106711

RESUMO

BACKGROUND: Adequate haemodialysis (HD) in people with end-stage kidney disease (ESKD) is reliant upon establishment of vascular access, which may consist of arteriovenous fistula, arteriovenous graft, or central venous catheters (CVC). Although discouraged due to high rates of infectious and thrombotic complications as well as technical issues that limit their life span, CVC have the significant advantage of being immediately usable and are the only means of vascular access in a significant number of patients. Previous studies have established the role of thrombolytic agents (TLA) in the prevention of catheter malfunction. Systematic review of different thrombolytic agents has also identified their utility in restoration of catheter patency following catheter malfunction. To date the use and efficacy of fibrin sheath stripping and catheter exchange have not been evaluated against thrombolytic agents. OBJECTIVES: This review aimed to evaluate the benefits and harms of TLA, preparations, doses and administration as well as fibrin-sheath stripping, over-the-wire catheter exchange or any other intervention proposed for management of tunnelled CVC malfunction in patients with ESKD on HD. SEARCH METHODS: We searched the Cochrane Kidney and Transplant Specialised Register up to 17 August 2017 through contact with the Information Specialist using search terms relevant to this review. Studies in the Specialised Register are identified through searches of CENTRAL, MEDLINE, and EMBASE, conference proceedings, the International Clinical Trials Register (ICTRP) Search Portal, and ClinicalTrials.gov. SELECTION CRITERIA: We included all studies conducted in people with ESKD who rely on tunnelled CVC for either initiation or maintenance of HD access and who require restoration of catheter patency following late-onset catheter malfunction and evaluated the role of TLA, fibrin sheath stripping or over-the-wire catheter exchange to restore catheter function. The primary outcome was be restoration of line patency defined as ≥ 300 mL/min or adequate to complete a HD session or as defined by the study authors. Secondary outcomes included dialysis adequacy and adverse outcomes. DATA COLLECTION AND ANALYSIS: Two authors independently assessed retrieved studies to determine which studies satisfy the inclusion criteria and carried out data extraction. Included studies were assessed for risk of bias. Summary estimates of effect were obtained using a random-effects model, and results were expressed as risk ratios (RR) and their 95% confidence intervals (CI) for dichotomous outcomes, and mean difference (MD) and 95% CI for continuous outcomes. Confidence in the evidence was assessed using GRADE. MAIN RESULTS: Our search strategy identified 8 studies (580 participants) as eligible for inclusion in this review. Interventions included: thrombolytic therapy versus placebo (1 study); low versus high dose thrombolytic therapy (1); alteplase versus urokinase (1); short versus long thrombolytic dwell (1); thrombolytic therapy versus percutaneous fibrin sheath stripping (1); fibrin sheath stripping versus over-the-wire catheter exchange (1); and over-the-wire catheter exchange versus exchange with and without angioplasty sheath disruption (1). No two studies compared the same interventions. Most studies had a high risk of bias due to poor study design, broad inclusion criteria, low patient numbers and industry involvement.Based on low certainty evidence, thrombolytic therapy may restore catheter function when compared to placebo (149 participants: RR 4.05, 95% CI 1.42 to 11.56) but there is no data available to suggest an optimal dose or administration method. The certainty of this evidence is reduced due to the fact that it is based on only a single study with wide confidence limits, high risk of bias and imprecision in the estimates of adverse events (149 participants: RR 2.03, 95% CI 0.38 to 10.73).Based on the available evidence, physical disruption of a fibrin sheath using interventional radiology techniques appears to be equally efficacious as the use of a pharmaceutical thrombolytic agent for the immediate management of dysfunctional catheters (57 participants: RR 0.92, 95% CI 0.80 to 1.07).Catheter patency is poor following use of thrombolytic agents with studies reporting median catheter survival rates of 14 to 42 days and was reported to improve significantly by fibrin sheath stripping or catheter exchange (37 participants: MD -27.70 days, 95% CI -51.00 to -4.40). Catheter exchange was reported to be superior to sheath disruption with respect to catheter survival (30 participants: MD 213.00 days, 95% CI 205.70 to 220.30).There is insufficient evidence to suggest any specific intervention is superior in terms of ensuring either dialysis adequacy or reduced risk of adverse events. AUTHORS' CONCLUSIONS: Thrombolysis, fibrin sheath disruption and over-the-wire catheter exchange are effective and appropriate therapies for immediately restoring catheter patency in dysfunctional cuffed and tunnelled HD catheters. On current data there is no evidence to support physical intervention over the use of pharmaceutical agents in the acute setting. Pharmacological interventions appear to have a bridging role and long-term catheter survival may be improved by fibrin sheath disruption and is probably superior following catheter exchange. There is no evidence favouring any of these approaches with respect to dialysis adequacy or risk of adverse events.The current review is limited by the small number of available studies with limited numbers of patients enrolled. Most of the studies included in this review were judged to have a high risk of bias and were potentially influenced by pharmaceutical industry involvement.Further research is required to adequately address the question of the most efficacious and clinically appropriate technique for HD catheter dysfunction.

14.
Arch Dermatol Res ; 316(6): 287, 2024 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-38805059

RESUMO

Since 2006, iPLEDGE, a risk evaluation and mitigation strategy (REMS), has attempted to prevent fetal exposures in people taking isotretinoin through contraceptive requirements and regular pregnancy testing. There has been criticism of iPLEDGE's requirements, results, and accessibility. iPLEDGE has placed significant burdens on physicians, patients, and administrative staff. Some level of burden is acceptable to prevent fetal exposures, but iPLEDGE burdens are so strenuous that physicians may choose not to prescribe isotretinoin because of them. There are several evidence-based adaptations that iPLEDGE and physicians can enact to improve the isotretinoin experience. First, physicians can practice shared-decision making in contraceptive counseling and educate patients on long-acting reversible contraceptives (LARCs) to improve the counseling process and outcomes. Second, physicians can take advantage of the reimbursed iPLEDGE contraceptive counseling sessions and refer patients accordingly. Finally, iPLEDGE should recognize the variation in efficacy among contraceptives. Specifically, LARCs and permanent surgical sterilization should be exempt from certain iPLEDGE requirements such as monthly pregnancy testing and attestations. iPLEDGE should work with dermatologists for the continual improvement of iPLEDGE. Communication, repetitive reassessment, and subsequent adaptations will result in better care for patients requiring isotretinoin.


Assuntos
Aconselhamento , Dermatologistas , Isotretinoína , Humanos , Feminino , Aconselhamento/métodos , Gravidez , Isotretinoína/efeitos adversos , Isotretinoína/uso terapêutico , Dermatologistas/psicologia , Acne Vulgar/tratamento farmacológico , Anticoncepção/métodos , Fármacos Dermatológicos/uso terapêutico , Tomada de Decisão Compartilhada , Medição de Risco , Contracepção Reversível de Longo Prazo/métodos
15.
JID Innov ; 4(4): 100285, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39036289

RESUMO

The image quality received for clinical evaluation is often suboptimal. The goal is to develop an image quality analysis tool to assess patient- and primary care physician-derived images using deep learning model. Dataset included patient- and primary care physician-derived images from August 21, 2018 to June 30, 2022 with 4 unique quality labels. VGG16 model was fine tuned with input data, and optimal threshold was determined by Youden's index. Ordinal labels were transformed to binary labels using a majority vote because model distinguishes between 2 categories (good vs bad). At a threshold of 0.587, area under the curve for the test set was 0.885 (95% confidence interval = 0.838-0.933); sensitivity, specificity, positive predictive value, and negative predictive value were 0.829, 0.784, 0.906, and 0.645, respectively. Independent validation of 300 additional images (from patients and primary care physicians) demonstrated area under the curve of 0.864 (95% confidence interval = 0.818-0.909) and area under the curve of 0.902 (95% confidence interval = 0.85-0.95), respectively. The sensitivity, specificity, positive predictive value, and negative predictive value for the 300 images were 0.827, 0.800, 0.959, and 0.450, respectively. We demonstrate a practical approach improving the image quality for clinical workflow. Although users may have to capture additional images, this is offset by the improved workload and efficiency for clinical teams.

16.
Nat Commun ; 15(1): 4422, 2024 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-38789440

RESUMO

The heterogeneous composition of cellular transcriptomes poses a major challenge for detecting weakly expressed RNA classes, as they can be obscured by abundant RNAs. Although biochemical protocols can enrich or deplete specified RNAs, they are time-consuming, expensive and can compromise RNA integrity. Here we introduce RISER, a biochemical-free technology for the real-time enrichment or depletion of RNA classes. RISER performs selective rejection of molecules during direct RNA sequencing by identifying RNA classes directly from nanopore signals with deep learning and communicating with the sequencing hardware in real time. By targeting the dominant messenger and mitochondrial RNA classes for depletion, RISER reduces their respective read counts by more than 85%, resulting in an increase in sequencing depth of 47% on average for long non-coding RNAs. We also apply RISER for the depletion of globin mRNA in whole blood, achieving a decrease in globin reads by more than 90% as well as an increase in non-globin reads by 16% on average. Furthermore, using a GPU or a CPU, RISER is faster than GPU-accelerated basecalling and mapping. RISER's modular and retrainable software and intuitive command-line interface allow easy adaptation to other RNA classes. RISER is available at https://github.com/comprna/riser .


Assuntos
RNA Mensageiro , Análise de Sequência de RNA , Análise de Sequência de RNA/métodos , Humanos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , RNA Longo não Codificante/genética , RNA/genética , Software , Globinas/genética , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Aprendizado Profundo , Transcriptoma , RNA Mitocondrial/genética , RNA Mitocondrial/metabolismo
17.
Forensic Sci Int Genet ; 71: 103048, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38640705

RESUMO

DNA methylation plays essential roles in regulating physiological processes, from tissue and organ development to gene expression and aging processes and has emerged as a widely used biomarker for the identification of body fluids and age prediction. Currently, methylation markers are targeted independently at specific CpG sites as part of a multiplexed assay rather than through a unified assay. Methylation detection is also dependent on divergent methodologies, ranging from enzyme digestion and affinity enrichment to bisulfite treatment, alongside various technologies for high-throughput profiling, including microarray and sequencing. In this pilot study, we test the simultaneous identification of age-associated and body fluid-specific methylation markers using a single technology, nanopore adaptive sampling. This innovative approach enables the profiling of multiple CpG marker sites across entire gene regions from a single sample without the need for specialized DNA preparation or additional biochemical treatments. Our study demonstrates that adaptive sampling achieves sufficient coverage in regions of interest to accurately determine the methylation status, shows a robust consistency with whole-genome bisulfite sequencing data, and corroborates known CpG markers of age and body fluids. Our work also resulted in the identification of new sites strongly correlated with age, suggesting new possible age methylation markers. This study lays the groundwork for the systematic development of nanopore-based methodologies in both age prediction and body fluid identification, highlighting the feasibility and potential of nanopore adaptive sampling while acknowledging the need for further validation and expansion in future research.


Assuntos
Envelhecimento , Ilhas de CpG , Metilação de DNA , Humanos , Ilhas de CpG/genética , Projetos Piloto , Marcadores Genéticos , Envelhecimento/genética , Adulto , Nanoporos , Pessoa de Meia-Idade , Idoso , Análise de Sequência de DNA , Masculino , Saliva/química , Feminino , Adulto Jovem , Sequenciamento por Nanoporos , Sêmen/química
18.
Semin Dial ; 26(3): 361-5, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-22994648

RESUMO

Establishing and maintaining hemodialysis access are major challenges in dialysis patient care. The impact of implementing guideline recommendations around vascular access surveillance, which lacks strong evidence, is poorly understood. We report the results of a vascular access surveillance and early intervention program upon hemodialysis thrombosis rates for all patients hemodialyzing in a single center between January 2005 and March 2011. Data were derived from hospital records and the Australian and New Zealand Dialysis and Transplant Registry (ANZDATA). Data were collected of 227 prevalent patients over the 6-year period. Crude ultrasound and angiography intervention rates increased from 23 and 57 per 100 prevalent patients per quarter (/100 pts/qtr) to 31 and 83/100 pts/qtr, respectively, during the study. Crude thrombosis rates fell from 21 to 2/100 pts/qtr during the study. After adjustment for comorbidities, mean ultrasound use increased by 4.6% per quarter (95% CI: 2.4-6.9, p<0.001), mean interventional angiography increased by 2.6% per quarter (95% CI: 1.1-4.2, p=0.001), and the predicted mean of the number of thromboses decreased by 8.4% per quarter (95% CI: 5.6-11.1, p<0.001). Implementation of a vascular access surveillance increases service utilization and is associated with a reduction in vascular access thrombosis.


Assuntos
Derivação Arteriovenosa Cirúrgica , Oclusão de Enxerto Vascular/epidemiologia , Oclusão de Enxerto Vascular/prevenção & controle , Falência Renal Crônica/terapia , Monitorização Fisiológica , Diálise Renal , Trombose/epidemiologia , Trombose/prevenção & controle , Idoso , Feminino , Oclusão de Enxerto Vascular/diagnóstico , Humanos , Falência Renal Crônica/epidemiologia , Masculino , Pessoa de Meia-Idade , Nova Zelândia/epidemiologia , Vigilância da População , Estudos Prospectivos , Sistema de Registros , Taxa de Sobrevida
19.
Nephrology (Carlton) ; 18(1): 22-5, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23252801

RESUMO

A significant proportion of peritoneal dialysis (PD) patients will have abrupt technique failure requiring conversion to haemodialysis, often using temporary vascular catheters as bridging access. However, vascular catheter use has been associated with increased mortality and great effort has been made to reduce their use. Just under two decades ago, a trial of dual arteriovenous fistula (AVF) formation and Tenckhoff catheter insertion reported only 4% of those in whom back-up fistulae were formed ever used them. Patient demographic, surgical technique and fistula care over those decades have changed substantially, potentially making this practice feasible. Thirty-five selected patients at Concord Repatriation and General Hospital had AVF formed at the time of Tenckhoff insertion and were entered prospectively into a vascular access database. We retrospectively examined this database with a median follow up of 345 days (interquartile range 183-658). Thirty-one per cent of all patients used the preformed AVF, and a further 19% who were still on PD had clinically functioning AVF. The vast majority (62%) had abrupt PD technique failure. This is a marked difference to dated reports of AVF use after concurrent PD and AVF formation. It raises the possibility that the formation of back-up fistula may be another method to reduce the need for vascular catheter use.


Assuntos
Derivação Arteriovenosa Cirúrgica , Cateteres de Demora , Diálise Peritoneal , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
20.
BMC Rheumatol ; 7(1): 37, 2023 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-37807057

RESUMO

BACKGROUND: To determine the safety and efficacy of biological agents used in the treatment of systemic lupus erythematosus (SLE) in adults. METHODS: Systematic review and meta-analysis following PRISMA guidelines. DATA SOURCES: MEDLINE (through Pubmed), EMBASE, Cochrane library, Clinicaltrials.gov, Australianclinicaltrials.gov.au, ANZCTR.org.au and WHO International Clinical Trials Registry Platform for studies published from 20 May 2021 and 15 years prior. A grey literature search was performed and completed on 31 May 2021. STUDY CRITERIA: Phase II, III or quasi randomised controlled trials, studies with only cerebral or cutaneous lupus were excluded. DATA EXTRACTION: Two authors independently screened studies for eligibility, extracted, reviewed data for accuracy, and used the Cochrane tool to assess risk of bias. RESULTS: Forty-four studies were identified, consisting of 15 groups of drugs and 25 different biological agents, totalling 16,889 patients. The main outcomes assessed included Systemic Lupus Erythematosus Responder Index (SRI), BILAG-Based Composite Lupus Assessment (BICLA) and combined combined/partial renal remission (CRR/PRR). Four groups of biologics were found to improve outcomes. Anti-interferons: Anifrolumab increased BICLA response and SRI 5 to 8, decreased prednisone dosages, with increased herpes zoster infections, but fewer serious adverse events. Sifalimumab improved SRI but also increased herpes zoster infections. Anti BAFF/BLyS and/or APRIL: Belimumab consistently improved SRI 4, decreased prednisone dosages, increased combined CRR/PRR, and had no adverse safety outcomes. Tabalumab increased SRI 5 at 52 weeks with no steroid sparing effect but was associated with increased infusion related adverse events. Telitacicept improved SRI 4 at 52 weeks, with no increased adverse events, though data was rather sparse. Anti CD-20 monoclonal antibody, Obinutuzumab increased combined CRR/PRR at 1 and 2 years. Anti IL12/23 monoclonal antibody, Ustekinumab, increased SRI 4 to 6, but not BICLA at 24 weeks, with no concerning safety outcomes. CONCLUSION: Multiple biologic agents are shown in high quality studies to have a significant therapeutic impact on outcomes in SLE.

SELEÇÃO DE REFERÊNCIAS
Detalhe da pesquisa