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1.
J Clin Psychol Med Settings ; 29(3): 636-644, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-34436717

RESUMO

Integrated behavioral healthcare (IBH) is the "standard of care" to address psychosocial factors impacting diabetes outcomes; it is not standard in practice. This longitudinal, retrospective, chart-review examines IBH impact on glycemic control in an adult diabetes clinic. Adults (n = 374) with ≥ 1 behavioral health encounter, ≥ 2 hemoglobin A1c (HbA1c) values, and HbA1c value > 8% at initial IBH visit were included. Mixed effects linear piecewise models examined differences in slope trajectories for 365 days pre- and post-IBH intervention. Pre-intervention slope was not significant (z = - 1.09, p = 0.28). The post-intervention slope was significant (z = - 6.44, p < 0.001), indicating a significant linear decrease in HbA1c values. Results demonstrated that prior to engaging with behavioral health, there was no change in HbA1c. After initial IBH visit, there was a predicted reduction of > 1% in HbA1c over the following year. These results suggest that IBH significantly improves patients' metabolic status. Next steps for IBH research are offered.


Assuntos
Diabetes Mellitus Tipo 2 , Controle Glicêmico , Adulto , Atenção à Saúde , Hemoglobinas Glicadas/análise , Humanos , Estudos Retrospectivos
2.
Lancet ; 389(10067): 369-380, 2017 01 28.
Artigo em Inglês | MEDLINE | ID: mdl-28007348

RESUMO

BACKGROUND: The safety and effectiveness of a continuous, day-and-night automated glycaemic control system using insulin and glucagon has not been shown in a free-living, home-use setting. We aimed to assess whether bihormonal bionic pancreas initialised only with body mass can safely reduce mean glycaemia and hypoglycaemia in adults with type 1 diabetes who were living at home and participating in their normal daily routines without restrictions on diet or physical activity. METHODS: We did a random-order crossover study in volunteers at least 18 years old who had type 1 diabetes and lived within a 30 min drive of four sites in the USA. Participants were randomly assigned (1:1) in blocks of two using sequentially numbered sealed envelopes to glycaemic regulation with a bihormonal bionic pancreas or usual care (conventional or sensor-augmented insulin pump therapy) first, followed by the opposite intervention. Both study periods were 11 days in length, during which time participants continued all normal activities, including athletics and driving. The bionic pancreas was initialised with only the participant's body mass. Autonomously adaptive dosing algorithms used data from a continuous glucose monitor to control subcutaneous delivery of insulin and glucagon. The coprimary outcomes were the mean glucose concentration and time with continuous glucose monitoring (CGM) glucose concentration less than 3·3 mmol/L, analysed over days 2-11 in participants who completed both periods of the study. This trial is registered with ClinicalTrials.gov, number NCT02092220. FINDINGS: We randomly assigned 43 participants between May 6, 2014, and July 3, 2015, 39 of whom completed the study: 20 who were assigned to bionic pancreas first and 19 who were assigned to the comparator first. The mean CGM glucose concentration was 7·8 mmol/L (SD 0·6) in the bionic pancreas period versus 9·0 mmol/L (1·6) in the comparator period (difference 1·1 mmol/L, 95% CI 0·7-1·6; p<0·0001), and the mean time with CGM glucose concentration less than 3·3 mmol/L was 0·6% (0·6) in the bionic pancreas period versus 1·9% (1·7) in the comparator period (difference 1·3%, 95% CI 0·8-1·8; p<0·0001). The mean nausea score on the Visual Analogue Scale (score 0-10) was greater during the bionic pancreas period (0·52 [SD 0·83]) than in the comparator period (0·05 [0·17]; difference 0·47, 95% CI 0·21-0·73; p=0·0024). Body mass and laboratory parameters did not differ between periods. There were no serious or unexpected adverse events in the bionic pancreas period of the study. INTERPRETATION: Relative to conventional and sensor-augmented insulin pump therapy, the bihormonal bionic pancreas, initialised only with participant weight, was able to achieve superior glycaemic regulation without the need for carbohydrate counting. Larger and longer studies are needed to establish the long-term benefits and risks of automated glycaemic management with a bihormonal bionic pancreas. FUNDING: National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health, and National Center for Advancing Translational Sciences.


Assuntos
Diabetes Mellitus Tipo 1/tratamento farmacológico , Glucagon/administração & dosagem , Hormônios/administração & dosagem , Hipoglicemiantes/administração & dosagem , Sistemas de Infusão de Insulina , Insulina/administração & dosagem , Pâncreas Artificial , Adulto , Biônica , Glicemia/metabolismo , Estudos Cross-Over , Diabetes Mellitus Tipo 1/metabolismo , Feminino , Glucagon/uso terapêutico , Hormônios/uso terapêutico , Humanos , Hipoglicemia/induzido quimicamente , Hipoglicemiantes/uso terapêutico , Insulina/uso terapêutico , Masculino , Pessoa de Meia-Idade , Monitorização Fisiológica , Náusea/induzido quimicamente , Adulto Jovem
3.
Mol Ecol ; 25(8): 1838-55, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27112634

RESUMO

The process of domestication can exert intense trait-targeted selection on genes and regulatory regions. Specifically, rapid shifts in the structure and sequence of genomic regulatory elements could provide an explanation for the extensive, and sometimes extreme, variation in phenotypic traits observed in domesticated species. Here, we explored methylation differences from >24 000 cytosines distributed across the genomes of the domesticated dog (Canis familiaris) and the grey wolf (Canis lupus). PCA and model-based cluster analyses identified two primary groups, domestic vs. wild canids. A scan for significantly differentially methylated sites (DMSs) revealed species-specific patterns at 68 sites after correcting for cell heterogeneity, with weak yet significant hypermethylation typical of purebred dogs when compared to wolves (59% and 58%, P < 0.05, respectively). Additionally, methylation patterns at eight genes significantly deviated from neutrality, with similar trends of hypermethylation in purebred dogs. The majority (>66%) of differentially methylated regions contained or were associated with repetitive elements, indicative of a genotype-mediated trend. However, DMSs were also often linked to functionally relevant genes (e.g. neurotransmitters). Finally, we utilized known genealogical relationships among Yellowstone wolves to survey transmission stability of methylation marks, from which we found a substantial fraction that demonstrated high heritability (both H(2) and h(2 ) > 0.99). These analyses provide a unique epigenetic insight into the molecular consequences of recent selection and radiation of our most ancient domesticated companion, the dog. These findings suggest selection has acted on methylation patterns, providing a new genomic perspective on phenotypic diversification in domesticated species.


Assuntos
Metilação de DNA , Elementos de DNA Transponíveis , Cães/genética , Domesticação , Lobos/genética , Animais , Evolução Molecular , Padrões de Herança , Linhagem , Polimorfismo Genético , Análise de Sequência de DNA , Especificidade da Espécie
4.
Sci Rep ; 14(1): 13630, 2024 06 13.
Artigo em Inglês | MEDLINE | ID: mdl-38871777

RESUMO

This cross-sectional study investigated differences in the plasma metabolome in two groups of adults that were of similar age but varied markedly in body composition and dietary and physical activity patterns. Study participants included 52 adults in the lifestyle group (LIFE) (28 males, 24 females) and 52 in the control group (CON) (27 males, 25 females). The results using an extensive untargeted ultra high-performance liquid chromatography-high resolution mass spectrometry (UHPLC-HRMS) metabolomics analysis with 10,535 metabolite peaks identified 486 important metabolites (variable influence on projections scores of VIP ≥ 1) and 16 significantly enriched metabolic pathways that differentiated LIFE and CON groups. A novel metabolite signature of positive lifestyle habits emerged from this analysis highlighted by lower plasma levels of numerous bile acids, an amino acid profile characterized by higher histidine and lower glutamic acid, glutamine, ß-alanine, phenylalanine, tyrosine, and proline, an elevated vitamin D status, higher levels of beneficial fatty acids and gut microbiome catabolism metabolites from plant substrates, and reduced levels of N-glycan degradation metabolites and environmental contaminants. This study established that the plasma metabolome is strongly associated with body composition and lifestyle habits. The robust lifestyle metabolite signature identified in this study is consistent with an improved life expectancy and a reduced risk for chronic disease.


Assuntos
Estilo de Vida Saudável , Metaboloma , Metabolômica , Humanos , Masculino , Feminino , Metabolômica/métodos , Pessoa de Meia-Idade , Adulto , Estudos Transversais , Composição Corporal , Cromatografia Líquida de Alta Pressão , Ácidos e Sais Biliares/metabolismo , Ácidos e Sais Biliares/sangue , Exercício Físico/fisiologia , Estilo de Vida
5.
Nature ; 447(7143): 453-7, 2007 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-17468747

RESUMO

Amyloid fibrils formed from different proteins, each associated with a particular disease, contain a common cross-beta spine. The atomic architecture of a spine, from the fibril-forming segment GNNQQNY of the yeast prion protein Sup35, was recently revealed by X-ray microcrystallography. It is a pair of beta-sheets, with the facing side chains of the two sheets interdigitated in a dry 'steric zipper'. Here we report some 30 other segments from fibril-forming proteins that form amyloid-like fibrils, microcrystals, or usually both. These include segments from the Alzheimer's amyloid-beta and tau proteins, the PrP prion protein, insulin, islet amyloid polypeptide (IAPP), lysozyme, myoglobin, alpha-synuclein and beta(2)-microglobulin, suggesting that common structural features are shared by amyloid diseases at the molecular level. Structures of 13 of these microcrystals all reveal steric zippers, but with variations that expand the range of atomic architectures for amyloid-like fibrils and offer an atomic-level hypothesis for the basis of prion strains.


Assuntos
Amiloide/química , Fragmentos de Peptídeos/química , Sequência de Aminoácidos , Cristalização , Modelos Moleculares , Príons/química , Conformação Proteica
6.
Sci Rep ; 13(1): 16728, 2023 10 04.
Artigo em Inglês | MEDLINE | ID: mdl-37794065

RESUMO

This study used untargeted proteomics to compare blood proteomic profiles in two groups of adults that differed widely in lifestyle habits. A total of 52 subjects in the lifestyle group (LIFE) (28 males, 24 females) and 52 in the control group (CON) (27 males, 25 females) participated in this cross-sectional study. Age, education level, marital status, and height did not differ significantly between LIFE and CON groups. The LIFE and CON groups differed markedly in body composition, physical activity patterns, dietary intake patterns, disease risk factor prevalence, blood measures of inflammation, triglycerides, HDL-cholesterol, glucose, and insulin, weight-adjusted leg/back and handgrip strength, and mood states. The proteomics analysis showed strong group differences for 39 of 725 proteins identified in dried blood spot samples. Of these, 18 were downregulated in the LIFE group and collectively indicated a lower innate immune activation signature. A total of 21 proteins were upregulated in the LIFE group and supported greater lipoprotein metabolism and HDL remodeling. Lifestyle-related habits and biomarkers were probed and the variance (> 50%) in proteomic profiles was best explained by group contrasts in indicators of adiposity. This cross-sectional study established that a relatively small number of proteins are associated with good lifestyle habits.


Assuntos
Força da Mão , Proteômica , Adulto , Masculino , Feminino , Humanos , Estudos Transversais , Fatores de Risco , Triglicerídeos , Estilo de Vida , Estilo de Vida Saudável , HDL-Colesterol , Imunidade Inata , Índice de Massa Corporal
7.
Genome Res ; 19(10): 1836-42, 2009 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-19622793

RESUMO

Next-generation DNA sequencing technologies have revolutionized diverse genomics applications, including de novo genome sequencing, SNP detection, chromatin immunoprecipitation, and transcriptome analysis. Here we apply deep sequencing to genome-scale fitness profiling to evaluate yeast strain collections in parallel. This method, Barcode analysis by Sequencing, or "Bar-seq," outperforms the current benchmark barcode microarray assay in terms of both dynamic range and throughput. When applied to a complex chemogenomic assay, Bar-seq quantitatively identifies drug targets, with performance superior to the benchmark microarray assay. We also show that Bar-seq is well-suited for a multiplex format. We completely re-sequenced and re-annotated the yeast deletion collection using deep sequencing, found that approximately 20% of the barcodes and common priming sequences varied from expectation, and used this revised list of barcode sequences to improve data quality. Together, this new assay and analysis routine provide a deep-sequencing-based toolkit for identifying gene-environment interactions on a genome-wide scale.


Assuntos
Processamento Eletrônico de Dados/métodos , Perfilação da Expressão Gênica/métodos , Análise de Sequência com Séries de Oligonucleotídeos/métodos , Fenótipo , Análise de Sequência de DNA/métodos , Antibacterianos/farmacologia , Análise Custo-Benefício , Doxorrubicina/farmacologia , Avaliação Pré-Clínica de Medicamentos/métodos , Processamento Eletrônico de Dados/economia , Genômica/métodos , Testes de Sensibilidade Microbiana , Análise de Sequência com Séries de Oligonucleotídeos/economia , Piridinas/farmacologia , Sensibilidade e Especificidade , Análise de Sequência de DNA/economia , Tunicamicina/farmacologia , Leveduras/efeitos dos fármacos , Leveduras/fisiologia
8.
Nat Commun ; 13(1): 783, 2022 02 10.
Artigo em Inglês | MEDLINE | ID: mdl-35145108

RESUMO

Infinium methylation arrays are not available for the vast majority of non-human mammals. Moreover, even if species-specific arrays were available, probe differences between them would confound cross-species comparisons. To address these challenges, we developed the mammalian methylation array, a single custom array that measures up to 36k CpGs per species that are well conserved across many mammalian species. We designed a set of probes that can tolerate specific cross-species mutations. We annotate the array in over 200 species and report CpG island status and chromatin states in select species. Calibration experiments demonstrate the high fidelity in humans, rats, and mice. The mammalian methylation array has several strengths: it applies to all mammalian species even those that have not yet been sequenced, it provides deep coverage of conserved cytosines facilitating the development of epigenetic biomarkers, and it increases the probability that biological insights gained in one species will translate to others.


Assuntos
Sequência Conservada , Metilação de DNA , Mamíferos/genética , Mamíferos/metabolismo , Processamento de Proteína Pós-Traducional/genética , Processamento de Proteína Pós-Traducional/fisiologia , Animais , Biomarcadores , Ilhas de CpG , Epigênese Genética , Humanos , Camundongos , Mutação , Ratos , Transcriptoma
9.
Diabetes Technol Ther ; 24(6): 424-434, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35294272

RESUMO

Objective: To evaluate glycemic outcomes in the Wireless Innovation for Seniors with Diabetes Mellitus (WISDM) randomized clinical trial (RCT) participants during an observational extension phase. Research Design and Methods: WISDM RCT was a 26-week RCT comparing continuous glucose monitoring (CGM) with blood glucose monitoring (BGM) in 203 adults aged ≥60 years with type 1 diabetes. Of the 198 participants who completed the RCT, 100 (98%) CGM group participants continued CGM (CGM-CGM cohort) and 94 (98%) BGM group participants initiated CGM (BGM-CGM cohort) for an additional 26 weeks. Results: CGM was used a median of >90% of the time at 52 weeks in both cohorts. In the CGM-CGM cohort, median time <70 mg/dL decreased from 5.0% at baseline to 2.6% at 26 weeks and remained stable with a median of 2.8% at 52 weeks (P < 0.001 baseline to 52 weeks). Participants spent more time in range 70-180 mg/dL (TIR) (mean 56% vs. 64%; P < 0.001) and had lower hemoglobin A1c (HbA1c) (mean 7.6% [59 mmol/mol] vs. 7.4% [57 mmol/mol]; P = 0.01) from baseline to 52 weeks. In BGM-CGM, from 26 to 52 weeks median time <70 mg/dL decreased from 3.9% to 1.9% (P < 0.001), TIR increased from 56% to 60% (P = 0.006) and HbA1c decreased from 7.5% (58 mmol/mol) to 7.3% (57 mmol/mol) (P = 0.025). In BGM-CGM, a severe hypoglycemic event was reported for nine participants while using BGM during the RCT and for two participants during the extension phase with CGM (P = 0.02). Conclusions: CGM use reduced hypoglycemia without increasing hyperglycemia in older adults with type 1 diabetes. These data provide further evidence for fully integrating CGM into clinical practice. Clinicaltrials.gov (NCT03240432).


Assuntos
Diabetes Mellitus Tipo 1 , Hipoglicemia , Idoso , Glicemia , Automonitorização da Glicemia , Diabetes Mellitus Tipo 1/tratamento farmacológico , Hemoglobinas Glicadas/análise , Humanos , Hipoglicemia/prevenção & controle , Hipoglicemiantes/uso terapêutico
10.
JMIR Diabetes ; 6(1): e25574, 2021 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-33704077

RESUMO

BACKGROUND: Patients with poorly controlled type 2 diabetes (T2D) experience increased morbidity, increased mortality, and higher cost of care. Self-monitoring of blood glucose (SMBG) is a critical component of diabetes self-management with established diabetes outcome benefits. Technological advancements in blood glucose meters, including cellular-connected devices that automatically upload SMBG data to secure cloud-based databases, allow for improved sharing and monitoring of SMBG data. Real-time monitoring of SMBG data presents opportunities to provide timely support to patients that is responsive to abnormal SMBG recordings. Such diabetes remote monitoring programs can provide patients with poorly controlled T2D additional support needed to improve critical outcomes. OBJECTIVE: To evaluate 6 months of a diabetes remote monitoring program facilitated by cellular-connected glucose meter, access to a diabetes coach, and support responsive to abnormal blood glucose recordings greater than 400 mg/dL or below 50 mg/dL in adults with poorly controlled T2D. METHODS: Patients (N=119) receiving care at a diabetes center of excellence participated in a two-arm, 12-month randomized crossover study. The intervention included a cellular-connected glucose meter and phone-based diabetes coaching provided by Livongo Health. The coach answered questions, assisted in goal setting, and provided support in response to abnormal glucose levels. One group received the intervention for 6 months before returning to usual care (IV/UC). The other group received usual care before enrolling in the intervention (UC/IV) for 6 months. Change in hemoglobin A1c (HbA1c) was the primary outcome, and change in treatment satisfaction was the secondary outcome. RESULTS: Improvements in mean HbA1c were seen in both groups during the first 6 months (IV/UC -1.1%, SD 1.5 vs UC/IV -0.8%, SD 1.5; P<.001). After crossover, there was no significant change in HbA1c in IV/UC (mean HbA1c change +0.2, SD 1.7, P=.41); however, those in UC/IV showed further improvement (mean HbA1c change -0.4%, SD 1.0, P=.008). A mixed-effects model showed no significant treatment effect (IV vs UC) over 12 months (P=.06). However, participants with higher baseline HbA1c and those in the first time period experienced greater improvements in HbA1c. Both groups reported similar improvements in treatment satisfaction throughout the study. CONCLUSIONS: Patients enrolled in the diabetes remote monitoring program intervention experienced improvements in HbA1c and treatment satisfaction similar to usual care at a specialty diabetes center. Future studies on diabetes remote monitoring programs should incorporate scheduled coaching components and involve family members and caregivers. TRIAL REGISTRATION: ClinicalTrials.gov NCT03124043; https://clinicaltrials.gov/ct2/show/NCT03124043.

11.
Evol Appl ; 14(5): 1263-1273, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34025766

RESUMO

DNA methylation data facilitate the development of accurate molecular estimators of chronological age or "epigenetic clocks." We present a robust epigenetic clock for the beluga whale, Delphinapterus leucas, developed for an endangered population in Cook Inlet, Alaska, USA. We used a custom methylation array to measure methylation levels at 37,491 cytosine-guanine sites (CpGs) from skin samples of dead whales (n = 67) whose chronological ages were estimated based on tooth growth layer groups. Using these calibration data, a penalized regression model selected 23 CpGs, providing an R 2 = 0.92 for the training data; and an R 2 = 0.74 and median absolute age error = 2.9 years for the leave one out cross-validation. We applied the epigenetic clock to an independent dataset of 38 skin samples collected with a biopsy dart from living whales between 2016 and 2018. Age estimates ranged from 11 to 27 years. We also report sex correlations in CpG data and describe an approach of identifying the sex of an animal using DNA methylation. The epigenetic estimators of age and sex presented here have broad applications for conservation and management of Cook Inlet beluga whales and potentially other cetaceans.

12.
Nat Biotechnol ; 23(3): 377-83, 2005 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15765094

RESUMO

A major challenge in drug discovery is to distinguish the molecular targets of a bioactive compound from the hundreds to thousands of additional gene products that respond indirectly to changes in the activity of the targets. Here, we present an integrated computational-experimental approach for computing the likelihood that gene products and associated pathways are targets of a compound. This is achieved by filtering the mRNA expression profile of compound-exposed cells using a reverse-engineered model of the cell's gene regulatory network. We apply the method to a set of 515 whole-genome yeast expression profiles resulting from a variety of treatments (compounds, knockouts and induced expression), and correctly enrich for the known targets and associated pathways in the majority of compounds examined. We demonstrate our approach with PTSB, a growth inhibitory compound with a previously unknown mode of action, by predicting and validating thioredoxin and thioredoxin reductase as its target.


Assuntos
Algoritmos , Desenho de Fármacos , Perfilação da Expressão Gênica/métodos , Regulação da Expressão Gênica/fisiologia , Engenharia de Proteínas/métodos , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/metabolismo , Transdução de Sinais/fisiologia , Inteligência Artificial , Simulação por Computador , Sistemas de Liberação de Medicamentos/métodos , Regulação da Expressão Gênica/efeitos dos fármacos , Modelos Biológicos , Modelos Estatísticos , Mapeamento de Interação de Proteínas/métodos , Saccharomyces cerevisiae/efeitos dos fármacos , Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/genética , Transdução de Sinais/efeitos dos fármacos , Tiorredoxina Dissulfeto Redutase/genética , Tiorredoxina Dissulfeto Redutase/metabolismo , Tiorredoxinas/genética , Tiorredoxinas/metabolismo
13.
Cell Rep ; 25(13): 3721-3732.e6, 2018 12 26.
Artigo em Inglês | MEDLINE | ID: mdl-30590044

RESUMO

Complement-mediated cytotoxicity may act as a selective pressure for tumor overexpression of complement regulators. We hypothesize that the same selective pressure could lead to complement alterations at the genetic level. We find that, when analyzed as a pathway, mutations in complement genes occur at a relatively high frequency and are associated with changes in overall survival across a number of cancer types. Analysis of pathways expressed in patients with complement mutations that are associated with poor overall survival reveals crosstalk between complement and hypoxia in colorectal cancer. The importance of this crosstalk is highlighted by two key findings: hypoxic signaling is increased in tumors harboring complement mutations, and hypoxic tumor cells are resistant to complement-mediated cytotoxicity due, in part, to hypoxia-induced expression of complement regulator CD55. The range of strategies employed by tumors to dysregulate the complement system testifies to the importance of this pathway in tumor progression.


Assuntos
Neoplasias Colorretais/genética , Neoplasias Colorretais/imunologia , Imunidade Inata/genética , Mutação/genética , Transdução de Sinais , Hipóxia Tumoral/genética , Adulto , Animais , Antígenos de Neoplasias/metabolismo , Neoplasias Colorretais/patologia , Proteínas do Sistema Complemento/genética , Citotoxicidade Imunológica/genética , Células HCT116 , Humanos , Masculino , Camundongos , Análise de Sobrevida
14.
Aging (Albany NY) ; 10(10): 2832-2854, 2018 10 21.
Artigo em Inglês | MEDLINE | ID: mdl-30348905

RESUMO

Human DNA-methylation data have been used to develop highly accurate biomarkers of aging ("epigenetic clocks"). Recent studies demonstrate that similar epigenetic clocks for mice (Mus Musculus) can be slowed by gold standard anti-aging interventions such as calorie restriction and growth hormone receptor knock-outs. Using DNA methylation data from previous publications with data collected in house for a total 1189 samples spanning 193,651 CpG sites, we developed 4 novel epigenetic clocks by choosing different regression models (elastic net- versus ridge regression) and by considering different sets of CpGs (all CpGs vs highly conserved CpGs). We demonstrate that accurate age estimators can be built on the basis of highly conserved CpGs. However, the most accurate clock results from applying elastic net regression to all CpGs. While the anti-aging effect of calorie restriction could be detected with all types of epigenetic clocks, only ridge regression based clocks replicated the finding of slow epigenetic aging effects in dwarf mice. Overall, this study demonstrates that there are trade-offs when it comes to epigenetic clocks in mice. Highly accurate clocks might not be optimal for detecting the beneficial effects of anti-aging interventions.


Assuntos
Relógios Biológicos/genética , Metilação de DNA , Epigênese Genética , Longevidade/genética , Fatores Etários , Animais , Relógios Biológicos/efeitos dos fármacos , Restrição Calórica , Ilhas de CpG , Metilação de DNA/efeitos dos fármacos , Bases de Dados Genéticas , Modelos Animais de Doenças , Nanismo/genética , Nanismo/metabolismo , Epigênese Genética/efeitos dos fármacos , Feminino , Estudo de Associação Genômica Ampla , Longevidade/efeitos dos fármacos , Masculino , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Camundongos Knockout , Camundongos Mutantes , Sirolimo/farmacologia , Especificidade da Espécie
15.
Aging (Albany NY) ; 9(3): 1055-1068, 2017 03 28.
Artigo em Inglês | MEDLINE | ID: mdl-28373601

RESUMO

Several articles describe highly accurate age estimation methods based on human DNA-methylation data. It is not yet known whether similar epigenetic aging clocks can be developed based on blood methylation data from canids. Using Reduced Representation Bisulfite Sequencing, we assessed blood DNA-methylation data from 46 domesticated dogs (Canis familiaris) and 62 wild gray wolves (C. lupus). By regressing chronological dog age on the resulting CpGs, we defined highly accurate multivariate age estimators for dogs (based on 41 CpGs), wolves (67 CpGs), and both combined (115 CpGs). Age related DNA methylation changes in canids implicate similar gene ontology categories as those observed in humans suggesting an evolutionarily conserved mechanism underlying age-related DNA methylation in mammals.


Assuntos
Envelhecimento/genética , Metilação de DNA , Cães/genética , Epigênese Genética , Lobos/genética , Animais , Feminino , Masculino
16.
PLoS One ; 12(5): e0176860, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28459844

RESUMO

IMPORTANCE: >50% of patients with new-onset type 1 diabetes (T1D) do not enter partial clinical remission (PCR); early identification of these patients may improve initial glycemic control and reduce long-term complications. AIM: To determine whether routinely obtainable clinical parameters predict non-remission in children and adolescents with new-onset T1D. SUBJECTS AND METHODS: Data on remission were collected for the first 36 months of disease in 204 subjects of ages 2-14 years with new-onset type 1 diabetes. There were 86 remitters (age 9.1±3.0y; male 57%), and 118 non-remitters (age 7.0±3.1y; male 40.7%). PCR was defined as insulin-dose adjusted hemoglobin A1c of ≤9. RESULTS: Non-remission occurred in 57.8% of subjects. Univariable analysis showed that the risk for non-remission was increased 9-fold in patients with 4 diabetes-associated auto-antibodies (OR = 9.90, p = 0.010); 5-fold in patients <5 years old (odds ratio = 5.38, p = 0.032), 3-fold in those with bicarbonate of <15 mg/dL at diagnosis (OR = 3.71, p = 0.008). Combined estimates of risk potential for HC03 and the number of autoantibodies by multivariable analysis, adjusted for BMI standard deviation score, showed HC03 <15 mg/dL with a clinically significant 10-fold risk (OR = 10.1, p = 0.074); and the number of autoantibodies with a 2-fold risk for non-remission (OR = 1.9, p = 0.105). Male sex and older age were associated with decreased risk for non-remission. A receiver-operating characteristic curve model depicting sensitivity by 1-specificity for non-remission as predicted by bicarbonate <15 mg/dL, age <5y, female sex, and >3 diabetes-associated autoantibodies had an area under the curve of 0.73. CONCLUSIONS: More than 50% of children and adolescents with new-onset T1D do not undergo partial clinical remission and are thus at an increased risk for long-term complications of diabetes mellitus. A predictive model comprising of bicarbonate <15 mg/dL, age <5y, female sex, and >3 diabetes-associated autoantibodies has 73% power for correctly predicting non-remission in children and adolescents with new-onset T1D. Early identification of these non-remitters may guide the institution of targeted therapy to limit dysglycemia and reduce the prevalence of long-term deleterious complications.


Assuntos
Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 1/terapia , Adenosina Trifosfatases/sangue , Adolescente , Fatores Etários , Proteínas de Transporte de Ânions/sangue , Autoanticorpos/metabolismo , Biomarcadores/metabolismo , Índice de Massa Corporal , Criança , Pré-Escolar , Diabetes Mellitus Tipo 1/epidemiologia , Diabetes Mellitus Tipo 1/metabolismo , Feminino , Hemoglobinas Glicadas/metabolismo , Humanos , Masculino , Modelos Biológicos , Modelos Estatísticos , Prognóstico , Curva ROC , Indução de Remissão , Risco , Fatores Sexuais , Resultado do Tratamento
17.
Clin Chim Acta ; 367(1-2): 150-5, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16423336

RESUMO

BACKGROUND: Microalbuminuria is the earliest clinical finding for renal disease. Diabetic individuals often produce modified forms of albumin, perhaps due to impaired lysosomal processing, that are undetectable by common immunoassays but accurately measured by HPLC. METHODS: We evaluated the performance of a commercially available, FDA-approved HPLC assay (AusAm Biotechnologies, NY) and compare results to our immunoturbidimetric assay (ITA, Beckman-Coulter, CA) using random urine specimens from 32 nondiabetic and 60 type 1 and 2 diabetic subjects. RESULTS: The HPLC assay was linear to 963 mg/l with a limit of detection of 6.1 mg/l. Within-run and between-run precision was <2% and 7-10%, respectively. Unpreserved urine was stable for at least 3 days at room temperature and 10 days at 4 degrees C. In both diabetic and nondiabetic subjects urinary albumin concentrations were higher by HPLC than by ITA, and many more diabetic and nondiabetic individuals were classified as microalbuminuric by HPLC than by ITA. The HPLC assay showed acceptable performance; however, because urinary albumin concentrations are higher in apparently healthy nondiabetic as well as diabetic subjects, different cutpoints will be necessary to accurately differentiate microalbuminuria. CONCLUSIONS: Prospective studies are necessary to determine whether the HPLC assay can effectively detect microalbuminuria earlier than current assays without a concomitant increase in the false positive rate.


Assuntos
Albuminas/análise , Albuminúria/urina , Cromatografia Líquida de Alta Pressão/normas , Adulto , Idoso , Albuminúria/classificação , Diabetes Mellitus/urina , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes
18.
Nucleic Acids Res ; 31(24): 7099-109, 2003 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-14654685

RESUMO

Genome-wide functional linkages among proteins in cellular complexes and metabolic pathways can be inferred from high throughput experimentation, such as DNA microarrays, or from bioinformatic analyses. Here we describe a method for the visualization and interpretation of genome-wide functional linkages inferred by the Rosetta Stone, Phylogenetic Profile, Operon and Conserved Gene Neighbor computational methods. This method involves the construction of a genome-wide functional linkage map, where each significant functional linkage between a pair of proteins is displayed on a two-dimensional scatter-plot, organized according to the order of genes along the chromosome. Subsequent hierarchical clustering of the map reveals clusters of genes with similar functional linkage profiles and facilitates the inference of protein function and the discovery of functionally linked gene clusters throughout the genome. We illustrate this method by applying it to the genome of the pathogenic bacterium Mycobacterium tuberculosis, assigning cellular functions to previously uncharacterized proteins involved in cell wall biosynthesis, signal transduction, chaperone activity, energy metabolism and polysaccharide biosynthesis.


Assuntos
Proteínas de Bactérias/metabolismo , Biologia Computacional/métodos , Genoma Bacteriano , Família Multigênica/genética , Mycobacterium tuberculosis/genética , Mycobacterium tuberculosis/metabolismo , Proteínas de Bactérias/genética , Parede Celular/metabolismo , Sequência Conservada/genética , Genes Bacterianos/genética , Mycobacterium tuberculosis/citologia , Óperon/genética , Filogenia , Ligação Proteica , Proteoma/genética , Proteoma/metabolismo , Proteômica , Reprodutibilidade dos Testes , Transdução de Sinais , Software
19.
Curr Opin Endocrinol Diabetes Obes ; 23(2): 111-20, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26915036

RESUMO

PURPOSE OF REVIEW: To discuss recent research on the use of telecommunication technologies to improve care for disengaged patients with diabetes. RECENT FINDINGS: It is established that patients who are disengaged with their healthcare have worse health outcomes. Reasons for disengagement vary but could be because of difficulties accessing or affording care or not possessing the skills or tools required to manage their disease. New patient-facing technologies are being used to improve communication and coordination of care for patients with diabetes. Early results show improvements in health outcomes. Utilizing these technologies to reach patient groups susceptible for disengagement has begun to demonstrate improvement. SUMMARY: Research over the past year has continued to demonstrate the promise of using telecommunication tools to assist patients in the management of diabetes. Although a few studies looked specifically at disengaged patients, efforts to utilize appropriate technological interventions targeting specific groups of patients are needed.


Assuntos
Diabetes Mellitus/terapia , Participação do Paciente , Telemedicina/métodos , Diabetes Mellitus/diagnóstico , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Cooperação do Paciente , Satisfação do Paciente , Prognóstico
20.
PLoS One ; 10(6): e0128814, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26039411

RESUMO

DNA methylation is an epigenetic mark associated with regulation of transcription and genome structure. These markers have been investigated in a variety of cancer settings for their utility in differentiating normal tissue from tumor tissue. Here, we examine the direct correlation between DNA methylation and patient survival. We find that changes in the DNA methylation of key pancreatic developmental genes are strongly associated with patient survival.


Assuntos
Metilação de DNA , Epigênese Genética , Proteínas de Neoplasias/genética , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/mortalidade , Pancreatite/genética , Idoso , Idoso de 80 Anos ou mais , Ilhas de CpG , Progressão da Doença , Feminino , Perfilação da Expressão Gênica , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Anotação de Sequência Molecular , Proteínas de Neoplasias/metabolismo , Estadiamento de Neoplasias , Pâncreas/metabolismo , Pâncreas/patologia , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/patologia , Pancreatite/diagnóstico , Pancreatite/patologia , Análise de Componente Principal , Análise de Sobrevida , Carga Tumoral
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