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Abstract
The co-occurrence of insulin resistance (IR)-related metabolic conditions with neuropsychiatric disorders is a complex public health challenge. Evidence of the genetic links between these phenotypes is emerging, but little is currently known about the genomic regions and biological functions that are involved. To address this, we performed Local Analysis of [co]Variant Association (LAVA) using large-scale (N=9,725-933,970) genome-wide association studies (GWASs) results for three IR-related conditions (type 2 diabetes mellitus, obesity, and metabolic syndrome) and nine neuropsychiatric disorders. Subsequently, positional and expression quantitative trait locus (eQTL)-based gene mapping and downstream functional genomic analyses were performed on the significant loci. Patterns of negative and positive local genetic correlations (|rg|=0.21-1, pFDR<0.05) were identified at 109 unique genomic regions across all phenotype pairs. Local correlations emerged even in the absence of global genetic correlations between IR-related conditions and Alzheimer’s disease, bipolar disorder, and Tourette’s syndrome. Genes mapped to the correlated regions showed enrichment in biological pathways integral to immune-inflammatory function, vesicle trafficking, insulin signalling, oxygen transport, and lipid metabolism. Colocalisation analyses further prioritised 10 genetically correlated regions for likely harbouring shared causal variants, displaying high deleterious or regulatory potential. These variants were found within or in close proximity to genes, such as SLC39A8 and HLA-DRB1, that can be targeted by supplements and already known drugs, including omega-3/6 fatty acids, immunomodulatory, antihypertensive, and cholesterol-lowering drugs. Overall, our findings underscore the complex genetic landscape of IR-neuropsychiatric multimorbidity, advocating for an integrated disease model and offering novel insights for research and treatment strategies in this domain.
Highlights
Local genetic correlations found even in the absence of global correlations.
Both positive and negative local correlations found for IR-neuropsychiatric pairs.
Enrichment for immune, and insulin signalling pathways, among others.
Pinpointed shared likely causal variants within 10 genomic regions.
Identified therapeutic targets, e.g., SLC39A8 and HLA-DRB1, for drug repurposing.
Die Nukleinsäure-Amplifikations Testung (NAT) von Blutprodukten wurde Mitte der 90er Jahre von europäischen Plasma verarbeitenden Firmen und großen deutschen Blutspendediensten entwickelt. Primäres Ziel war eine verbesserte Sicherheit von Blutprodukten, indem das so genannte diagnostische Fenster nach einer Virusinfektion bis zum ersten Nachweis von Antikörpern so weit wie möglich geschlossen werden sollte. Bei einer qualitätsgerechten PCR kommen bereits der Probenentnahme, dem Probentransport sowie der Probenlagerung große Bedeutung zu, da vermieden werden muß, daß es durch ungeeignete Antikoagulanzien oder Entnahmetechniken zu einem Sensitivitätsverlust kommt oder daß Kontaminationen falsch positive Ergebnisse hervorrufen. Wird ein Pooling von Proben durchgeführt, ergibt sich ein Verdünnungsfaktor, weshalb darauf zu achten ist, dass gegebenenfalls nachfolgende Anreicherungsschritte für Viren, wie z.B. eine Zentrifugation, implementiert werden. Der Gesamtprozeß von Pooling und Virusanreicherung ist ebenso wie die Probenvorbereitung durch geeignete Maßnahmen zu validieren und durch Qualitätssicherungsmaßnahmen zu flankieren. Die in der Extraktion der viralen Nukleinsäuren verwendeten Reagenzien sollten im Laboralltag möglichst einfach zu handhaben sein, keine Gefährdung des Laborpersonals darstellen und die Virus-Nukleinsäure gleichzeitig mit höchster Effizienz freisetzen und in sehr hoher Reinheit für die anschließende Amplifikation bereitstellen. Qualitätssicherungmaßnahmen sollen hier sowohl die geforderte Effizienz des Prozesses sichern als auch verhindern, daß es in dieser kritischen Phase zu Kontaminationen kommt. Zur Amplifikation stehen verschiedene Methoden zur Verfügung, wobei die PCR, insbesondere bei inhouse-Systemen, die weiteste Verbreitung gefunden hat. Der Prozeß der Amplifikation sollte möglichst im geschlossenen System erfolgen, wie dies z.B. in Real-time PCR-Systemen die Regel ist, ohne daß das Reaktionsgefäß während oder nach dem Amplifikationsprozeß geöffnet werden muß. Dies gewährleistet eine hohe Sicherheit vor Kontaminationen durch freigesetzte Amplifikate. Im Blutspendewesen ist es von höchster Bedeutung, daß negative Ergebnisse tatsächlich negative Blutspenden anzeigen. Interne Kontrollen, die eine korrekte Funktionsweise jeder individuellen PCR signalisieren, sollten deshalb in jeder Reaktion mitgeführt werden. Neben internen Kontrollen sind externe Negativ- und Positiv-Kontrollen mitzuführen, um falsch positive Reaktionen nachzuweisen bzw. auch die vor der PCR liegenden Prozesse wie Virusanreicherung und Extraktion zu überwachen. Alle Prozesse sind nach den von den Behörden festgelegten Kriterien durchgängig zu validieren, und es ist routinemäßig an externen Qualitätskontrollmaßnahmen (Ringversuchen) teilzunehmen.
Background: For rheumatoid arthritis (RA), the treat-to-target concept suggests attaining remission or at least low disease activity (LDA) after 12 weeks.
Objectives: This German, prospective, multicenter, non-interventional study aimed to determine the proportion of patients with RA who achieved their treat-to-target aim after 12 and 24 weeks of etanercept (ETN) treatment in a real-life setting, as opposed to patients achieving their therapeutic target at a later timepoint (week 36 or 52).
Methods: A total of 824 adults with a confirmed diagnosis of RA without prior ETN treatment were included. Remission and LDA were defined as DAS28 < 2.6 and DAS28 ≤ 3.2, respectively.
Results: The proportion of patients achieving remission was 24% at week 12 and 31% at week 24. The proportion of patients achieving LDA was 39% at week 12 and 45% at week 24. The proportion of patients achieving remission or LDA further increased beyond week 24 up to week 52. Improvement in pain and reduction in concomitant glucocorticoid treatment were observed. Improvements in patient-reported outcomes were also seen in patients who did not reach remission or LDA. No new safety signals were detected.
Conclusions: A considerable proportion of patients with RA attained the target of remission or LDA after 12 weeks of ETN treatment. Even beyond that timepoint, the proportion of patients achieving treatment targets continued to increase up to week 52.
Trial Registration
ClinicalTrials.gov Identifier: NCT02486302.
Plain Language Summary
Physicians measure response to treatment of rheumatoid arthritis using a disease activity score (DAS28). People with a DAS28 of less than 2.6 have very few to no symptoms (also called remission). People with a DAS28 of 3.2 or less, called low disease activity, may experience mild symptoms. When people do not respond to treatment after 12 weeks, it is usually recommended to prescribe a different treatment. Researchers do not know how many people who do not respond after 12 weeks would respond if treatment were continued. A total of 824 German people with rheumatoid arthritis who received a drug called etanercept for up to 52 weeks took part in this study. Researchers wanted to know how many people had remission or low disease activity after 12 weeks and 24 weeks of treatment.
After 12 weeks, 24 in 100 people had remission; this increased to 31 in 100 people after 24 weeks. Thirty-nine in 100 people had low disease activity after 12 weeks; this increased to 45 in 100 people after 24 weeks. The number of people with remission or low disease activity increased with longer treatment (up to 52 weeks). People needed less additional treatment with a type of drug called glucocorticoids. The people in this study experienced side effects that were similar to those reported by people who took etanercept in previous studies.
The researchers concluded that a considerable proportion of people responded to treatment with etanercept after 12 weeks. This proportion increased when treatment was continued for longer than 12 weeks.
Porous tantalum trabecular metal biomaterial has a similar structure to trabecular bone, and was recently added to titanium dental implants as a surface enhancement. The purpose of this prospective pilot study was to describe 5-year survival results and crestal bone level changes around immediately-provisionalized Trabecular Metal Dental Implants. Eligible patients were adults in need of ≥1 implants in the posterior jaw. A non-occluding single acrylic provisional crown was in place for up to 14 days before final restoration. Clinical evaluations with radiographs were conducted at each follow-up visit (1 month, 3 months, 6 months, and 1 to 5 years). The primary endpoint was implant survival, characterized using the Kaplan-Meier method. The secondary endpoint was changes in crestal bone level, evaluated using a paired t-test to compare mean crestal bone levels between the baseline, 6-month, and annual follow-up values. In total, 30 patients (37 implants) were treated. Mean patient age was 45.5 years, and 63% were female. There was one implant failure; cumulative survival at 5 years was 97.2%. After the initial bone loss of 0.40 mm in the first 6 months, there were no statistically significant changes in crestal bone level over time up to 5 years of follow-up.
Objective: Liver stiffness measurement (LSM) is a tool used to screen for significant fibrosis and portal hypertension. The aim of this retrospective multicentre study was to develop an easy tool using LSM for clinical outcomes in advanced chronic liver disease (ACLD) patients.
Design: This international multicentre cohort study included a derivation ACLD patient cohort with valid two-dimensional shear wave elastography (2D-SWE) results. Clinical and laboratory parameters at baseline and during follow-up were recorded. LSM by transient elastography (TE) was also recorded if available. The primary outcome was overall mortality. The secondary outcome was the development of first/further decompensation.
Results: After screening 2148 patients (16 centres), 1827 patients (55 years, 62.4% men) were included in the 2D-SWE cohort, with median liver SWE (L-SWE) 11.8 kPa and a model for end stage liver disease (MELD) score of 8. Combination of MELD score and L-SWE predict independently of mortality (AUC 0.8). L-SWE cut-off at ≥20 kPa combined with MELD ≥10 could stratify the risk of mortality and first/further decompensation in ACLD patients. The 2-year mortality and decompensation rates were 36.9% and 61.8%, respectively, in the 305 (18.3%) high-risk patients (with L-SWE ≥20 kPa and MELD ≥10), while in the 944 (56.6%) low-risk patients, these were 1.1% and 3.5%, respectively. Importantly, this M10LS20 algorithm was validated by TE-based LSM and in an additional cohort of 119 patients with valid point shear SWE-LSM.
Conclusion: The M10LS20 algorithm allows risk stratification of patients with ACLD. Patients with L-SWE ≥20 kPa and MELD ≥10 should be followed closely and receive intensified care, while patients with low risk may be managed at longer intervals.