Last update 21 Mar 2024
CCUS Clonal Cytopenia of Undetermined Significance
Last update 21 Mar 2024
Basic Info
Synonyms CCUS, CCUS Clonal Cytopenia of Undetermined Significance, Clonal Cytopenia of Undetermined Significance + [1] |
Introduction Clinically meaningful cytopenia in one or more hematopoietic cell lineages. Clonal hematopoiesis is present with the variant allele frequency (VAF) equal or more that 2 percent. There is no other evidence of hematologic malignancy. |
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A Pilot Study of Enasidenib for Patients With Clonal Cytopenia of Undetermined Significance and Mutations in IDH2: A Decentralized Trial
A Phase 2, Double-blind, Randomized Study to Compare the Effect of Curcumin Versus Placebo on Inflammatory Cytokines, Symptoms and Disease Parameters in Clonal Cytopenia of Undetermined Significance (CCUS), Low-Risk Myelodysplastic Syndrome (LR-MDS), and Myeloproliferative Neoplasms (MPNs)
Pilot Study of Statins in Patients With Clonal Cytopenia of Undetermined Significance (CCUS) and Myelodysplastic Syndromes (MDS)
100 Clinical Results associated with CCUS Clonal Cytopenia of Undetermined Significance
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100 Translational Medicine associated with CCUS Clonal Cytopenia of Undetermined Significance
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15 Feb 2024Circulation
Clonal Hematopoiesis of Indeterminate Potential With Loss of Tet2 Enhances Risk for Atrial Fibrillation Through Nlrp3 Inflammasome Activation.
Article
Author: Amy Erica Lin ; Aneesh C Bapat ; Ling Xiao ; Abhishek Niroula ; Jianchuan Ye ; Waihay J Wong ; Mridul Agrawal ; Christopher J Farady ; Andreas Boettcher ; Christopher B Hergott ; Marie McConkey ; Patricio Flores-Bringas ; Veronica Shkolnik ; Alexander G Bick ; David Milan ; Pradeep Natarajan ; Peter Libby ; Patrick T Ellinor ; Benjamin L Ebert
BACKGROUND:
Clonal hematopoiesis of indeterminate potential (CHIP), a common age-associated phenomenon, associates with increased risk of both hematological malignancy and cardiovascular disease. Although CHIP is known to increase the risk of myocardial infarction and heart failure, the influence of CHIP in cardiac arrhythmias, such as atrial fibrillation (AF), is less explored.
METHODS:
CHIP prevalence was determined in the UK Biobank, and incident AF analysis was stratified by CHIP status and clone size using Cox proportional hazard models. Lethally irradiated mice were transplanted with hematopoietic-specific loss of Tet2, hematopoietic-specific loss of Tet2 and Nlrp3, or wild-type control and fed a Western diet, compounded with or without NLRP3 (NLR [NACHT, LRR {leucine rich repeat}] family pyrin domain containing protein 3) inhibitor, NP3-361, for 6 to 9 weeks. Mice underwent in vivo invasive electrophysiology studies and ex vivo optical mapping. Cardiomyocytes from Ldlr-/- mice with hematopoietic-specific loss of Tet2 or wild-type control and fed a Western diet were isolated to evaluate calcium signaling dynamics and analysis. Cocultures of pluripotent stem cell-derived atrial cardiomyocytes were incubated with Tet2-deficient bone marrow-derived macrophages, wild-type control, or cytokines IL-1β (interleukin 1β) or IL-6 (interleukin 6).
RESULTS:
Analysis of the UK Biobank showed individuals with CHIP, in particular TET2 CHIP, have increased incident AF. Hematopoietic-specific inactivation of Tet2 increases AF propensity in atherogenic and nonatherogenic mouse models and is associated with increased Nlrp3 expression and CaMKII (Ca2+/calmodulin-dependent protein kinase II) activation, with AF susceptibility prevented by inactivation of Nlrp3. Cardiomyocytes isolated from Ldlr-/- mice with hematopoietic inactivation of Tet2 and fed a Western diet have impaired calcium release from the sarcoplasmic reticulum into the cytosol, contributing to atria arrhythmogenesis. Abnormal sarcoplasmic reticulum calcium release was recapitulated in cocultures of cardiomyocytes with the addition of Tet2-deficient macrophages or cytokines IL-1β or IL-6.
CONCLUSIONS:
We identified a modest association between CHIP, particularly TET2 CHIP, and incident AF in the UK Biobank population. In a mouse model of AF resulting from hematopoietic-specific inactivation of Tet2, we propose altered calcium handling as an arrhythmogenic mechanism, dependent on Nlrp3 inflammasome activation. Our data are in keeping with previous studies of CHIP in cardiovascular disease, and further studies into the therapeutic potential of NLRP3 inhibition for individuals with TET2 CHIP may be warranted.
06 Feb 2024Tuberculosis and respiratory diseases
Clonal hematopoiesis of indeterminate potential is associated with current smoking status and history of exacerbation in patients with COPD.
Article
Author: Jung-Kyu Lee ; Hongyul An ; Youngil Koh ; Chang-Hoon Lee
Background:
There is limited data regarding the clinical outcomes of clonal hematopoiesis of indeterminate potential (CHIP) in patients with chronic obstructive pulmonary disease (COPD). This study aimed to evaluate the clinical significance of CHIP as a COPD biomarker.
Methods:
This retrospective study was conducted on patients with COPD who were enrolled prospectively in the Seoul National University Hospital Airway Registry from January 2013 to December 2019 and underwent pulmonary function and blood tests. We evaluated the CHIP score according to smoking status and severity of airflow obstruction.
Results:
We analyzed next-generation sequencing data to detect CHIP in 125 patients with COPD. Current smokers had a higher prevalence of CHIP in DTP, DNMT3A, and PPM1D genes than in never- or ex-smokers. CHIP of DTP and DNMT3A genes was significantly associated with current smokers (aOR 2.80, 95% CI 1.01-7.79; aOR 4.03, 95% CI 1.09-14.0). Patients with moderate-to-severe airflow obstruction had a higher prevalence of CHIP in most of the explored genes than those with mild obstruction, although the difference was not statistically significant. CHIP in ASXL1 genes was significantly associated with history of mild, severe, and total acute exacerbation.
Conclusion:
Given that CHIP in specific genes was significantly associated with current smoking status and acute exacerbation, CHIP can be considered as a candidate biomarker for COPD patients.
19 Jan 2024iScience
Mechanism and anti-corrosion measures of carbon dioxide corrosion in CCUS: A review
Review
Author: Yan, Ting ; Xu, Liang-Chen ; Zeng, Zhuo-Xiong ; Pan, Wei-Guo
Carbon capture, utilization, and storage (CCUS) technology is widely recognized as a key solution for mitigating global climate change. Consequently, it has received significant attention from countries worldwide. However, carbon dioxide corrosion poses a significant challenge to CCUS and represents a bottleneck to the large-scale development and application of this technology. To mitigate this issue, this review starts with a discussion of corrosion problems in CCUS. Later, the fundamentals of the carbon dioxide corrosion mechanism are introduced. Then, the influences of various factors that affect the corrosion are highlighted, such as water content, pH, flow rate, etc. Afterward, we summarize the commonly used methods for corrosion protection, with a particular focus on inhibitor, given their eco-friendly and effective nature. Lastly, challenges and prospects are discussed to motivate future studies on developing novel, high-performance green inhibitor and studying the corresponding protection mechanisms, hoping to make some contributions to carbon emission reduction.
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