Publications by authors named "Pavel Hamet"

Background And Aims: Accumulating evidence indicates that reducing high blood pressure (BP) prevents dementia and mild cognitive impairment (MCI). Furthermore, although diabetes is a risk factor for dementia and MCI, there is uncertainty of the effect of intensive glucose control on these endpoints. This study aimed to determine the effects of BP-lowering (vs placebo) and intensive glucose-lowering (vs standard control) treatments according to baseline cognition and other characteristics on dementia and cognitive decline (CD) in people with type 2 diabetes mellitus (T2DM).

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Objective: To compare the vascular effects of pursuing more versus less glucose lowering in patients with younger or older age at diabetes diagnosis, and with shorter or longer diabetes duration.

Research Design And Methods: We studied 11,138 participants from the Action in Diabetes and Vascular Disease: Preterax and Diamicron MR Controlled Evaluation (ADVANCE) trial, classified into subgroups defined by age at diabetes diagnosis (≤50, >50-60, and >60 years) and diabetes duration (≤5, >5-10, and >10 years).

Results: Intensive glucose lowering significantly lowered the risk of the primary composite outcome of major macrovascular and microvascular events (hazard ratio 0.

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Initially introduced in 1909 by William Bateson, classic epistasis (genetic variant interaction) refers to the phenomenon that one variant prevents another variant from a different locus from manifesting its effects. The potential effects of genetic variant interactions on complex diseases have been recognized for the past decades. Moreover, It has been studied and demonstrated that leveraging the combined SNP effects within the genetic block can significantly increase calculation power, reducing background noise, ultimately leading to novel epistasis discovery that the single SNP statistical epistasis study might overlook.

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Oxidative stress mediated by reactive oxygen species (ROS) contributes to apoptosis of tubular epithelial cells (TECs) and renal inflammation during acute kidney injury (AKI). Copper metabolism MURR1 domain-containing 5 [COMMD5/hypertension-related, calcium-regulated gene (HCaRG)] shows strong cytoprotective properties. COMMD5 is highly expressed in proximal tubules (PTs), where it controls cell differentiation.

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Aim: Whether apolipoproteins (apolipoprotein A1, apolipoprotein B, apolipoprotein B/apolipoprotein A1 [ApoB/ApoA1] ratio) or very-low-density lipoprotein (VLDL) cholesterol are better risk predictors than established lipid risk markers, and whether there are sex differences, is uncertain, both in general populations and in patients with diabetes. The aim of this study was to assess the association between established risk markers, apolipoproteins and the risk of macro- and microvascular disease and death in a large study of women and men with diabetes and to assess the potential sex differences in the associations.

Materials And Methods: Established lipid risk markers were studied in 11 140 individuals with type 2 diabetes from the Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified-Release Controlled Evaluation (ADVANCE) trial, and apolipoproteins (A1, B, ApoB/ApoA1 ratio) and VLDL cholesterol from nuclear magnetic resonance (NMR) lipid analyses in biobanked samples from 3586 individuals included in the ADVANCE case-cohort study (ADVANCE CC).

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Article Synopsis
  • The ADVANCE trial examined the impact of intensive blood pressure lowering with perindopril-indapamide in patients with type 2 diabetes, revealing significant advantages in reducing cardiovascular and mortality risks.
  • Secondary analyses identified important risk markers in diabetes, such as the effects of stopping BP therapy and specific cardiac biomarkers.
  • The study also highlighted practical challenges in hypertension management, including limitations of traditional office BP readings and insights on the tolerability of combination therapy.
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X-chromosomal genetic variants are understudied but can yield valuable insights into sexually dimorphic human traits and diseases. We performed a sex-stratified cross-ancestry X-chromosome-wide association meta-analysis of seven kidney-related traits (n = 908,697), identifying 23 loci genome-wide significantly associated with two of the traits: 7 for uric acid and 16 for estimated glomerular filtration rate (eGFR), including four novel eGFR loci containing the functionally plausible prioritized genes ACSL4, CLDN2, TSPAN6 and the female-specific DRP2. Further, we identified five novel sex-interactions, comprising male-specific effects at FAM9B and AR/EDA2R, and three sex-differential findings with larger genetic effect sizes in males at DCAF12L1 and MST4 and larger effect sizes in females at HPRT1.

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Background: Standard measures of blood pressure (BP) do not account for both the magnitude and duration of exposure to elevated BP over time.

Objectives: The purpose of this study was to assess the association between cumulative systolic blood pressure (SBP) load and risk of cardiovascular events in patients with type 2 diabetes.

Methods: A post hoc analysis of patients with type 2 diabetes followed by the ADVANCE-ON (Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation - Observational Study).

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Background And Objectives: Hyperkalemia after starting renin-angiotensin system inhibitors has been shown to be subsequently associated with a higher risk of cardiovascular and kidney outcomes. However, whether to continue or discontinue the drug after hyperkalemia remains unclear.

Design, Setting, Participants, & Measurements: Data came from the Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE) trial, which included a run-in period where all participants initiated angiotensin-converting enzyme inhibitor-based therapy (a fixed combination of perindopril and indapamide).

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Article Synopsis
  • The study investigates the genetic factors contributing to the decline in estimated glomerular filtration rate (eGFR), a key indicator of kidney function, by analyzing data from 62 longitudinal studies involving over 343,000 participants.
  • Twelve significant genetic variants related to eGFR decline were identified, with most showing interaction effects based on age, which highlights how genetic influences on kidney function change as individuals get older.
  • The findings emphasize that individuals with certain genetic profiles face higher risks for kidney failure and acute kidney injury, providing valuable insights that could aid in drug development and strategies for managing kidney health.
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Article Synopsis
  • Reduced glomerular filtration rate (GFR) is a precursor to kidney failure, influenced by factors like genetics and diabetes (DM), but the interaction between these factors is not well understood.
  • A large-scale genome-wide association study (GWAS) analyzed eGFR across almost 1.5 million individuals, revealing distinct genetic loci that differ between those with and without diabetes.
  • The findings identified potential new targets for drug development aimed at protecting kidney function, highlighting that many drug interventions could be effective for both diabetic and non-diabetic populations.
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Aims/hypothesis: Type 2 diabetes increases the risk of cardiovascular and renal complications, but early risk prediction could lead to timely intervention and better outcomes. Genetic information can be used to enable early detection of risk.

Methods: We developed a multi-polygenic risk score (multiPRS) that combines ten weighted PRSs (10 wPRS) composed of 598 SNPs associated with main risk factors and outcomes of type 2 diabetes, derived from summary statistics data of genome-wide association studies.

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Background/aim: Copper metabolism MURR1 domain-containing 5 (COMMD5) is mainly expressed in renal tubules (RTs), where it facilitates re-differentiation of injured RTs. We reported that COMMD5 regulates the expression of epidermal growth factor receptor by participating in its endocytic membrane trafficking, thus inhibiting tumor growth. Here we aimed to determine the role of COMMD5 in malignant phenotypes of renal cell carcinoma (RCC).

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Objective: To develop a frailty index (FI) and explore the relationship of frailty to subsequent adverse outcomes on the effectiveness and safety of more intensive control of both blood glucose and blood pressure (BP), among participants with type 2 diabetes in the Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE) trial.

Research Design And Methods: Cox proportional hazard models were used to estimate the effectiveness and safety of intensive glucose control and BP intervention according to frailty (defined as FI >0.21) status.

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Aim: To estimate the associations between risk factors and cognitive decline (CD)/dementia, and the sex differences in these risk factors in individuals with type 2 diabetes, while accounting for the competing risk of death.

Materials And Methods: The Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE) trial of 11,140 individuals with type 2 diabetes was used to estimate the odds of CD/dementia using multinomial logistic regression.

Results: During a median 5-year follow-up, 1827 participants (43.

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There are limited data on whether estimated glomerular filtration rate (eGFR) variability modifies the risk of future clinical outcomes in type 2 diabetes (T2D). We assessed the association between 20-month eGFR variability and the risk of major clinical outcomes in T2D among 8241 participants in the ADVANCE trial. Variability in eGFR (coefficient of variation [CV ]) was calculated from three serum creatinine measurements over 20 months.

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Aims: For relatively old patients with diabetes, current guidelines recommend adjustment of glycaemic goals based on patients' cognitive function, or coexisting chronic illnesses. However, the evidence which supports the efficacy and safety of intensive glucose lowering in older patients with diabetes is scarce. The objective of the present study was to compare the efficacy and safety of intensive glucose lowering in patients with type 2 diabetes stratified by age (<65 and ≥ 65 years), and examine whether the effects differ according to patients' characteristics in the older patient group.

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Background: Angiotensin-converting enzyme 2 (ACE2) has been identified as the entry receptor for coronaviruses into human cells, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that causes coronavirus disease 2019 (COVID-19). Since hypertension (HT) is a leading comorbidity in non-survivors of COVID-19, we tested for association between ACE2 gene and HT in interaction with specific pre-existing conditions known to be associated with COVID-19 severity.

Methods: Genetic analysis of ACE2 gene was conducted in French-Canadian (FC) and British populations.

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Article Synopsis
  • - The study investigates the genetic factors contributing to the rapid decline in glomerular filtration rate (eGFRcrea), using data from 42 genome-wide association studies to analyze genetic loci linked to this decline.
  • - Two specific definitions of rapid eGFRcrea decline are examined, leading to the identification of seven independent genetic variants associated with this condition, including significant findings near three novel loci.
  • - The research suggests that individuals with a higher genetic risk for kidney function decline are more likely to experience acute kidney injury, indicating that these identified genetic loci could help in developing targeted therapies and identifying at-risk individuals.
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Objectives: The current screening method for diabetic nephropathy (DN) is based on detection of albumin in the urine and decline of glomerular filtration rate. The latter usually occurs relatively late in the course of the disease. A polygenic risk score (PRS) was recently developed for early prediction of the risk for patients with type 2 diabetes (T2D) to develop DN.

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Background: Creatinine-based estimated glomerular filtration rate (eGFR) is biased in the setting of obesity and other conditions. Alternative kidney filtration markers may be useful in adults with diabetes, but few studies examined the associations with risk of clinical outcomes.

Methods: In the Action in Diabetes and Vascular Disease: Preterax and Diamicron Modified Release Controlled Evaluation (ADVANCE) trial, we evaluated whether baseline levels and change in eGFR based on creatinine (Cr), cystatin c (Cys), β -microglobulin (B2M), eGFR , and the average of three estimates (eGFR ) assessed in 7217 participants at baseline and a random sample of 640 participants at the 1-year visit are associated with clinical outcomes.

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Aim: To examine possible sex differences in the excess risk of myocardial infarction (MI) consequent to a range of conventional risk factors in a large-scale international cohort of patients with diabetes, and to quantify these potential differences both on the relative and absolute scales.

Materials And Methods: Eleven thousand and sixty-five participants (42% women) with type 2 diabetes in the ADVANCE trial and its post-trial follow-up study, ADVANCE-ON, were included. Cox regression models were used to estimate hazard ratios (HRs) for associations between risk factors and MI (fatal and non-fatal) by sex, and the women-to-men ratio of HRs (RHR).

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