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1.
Curr Med Res Opin ; : 1-12, 2024 Jun 27.
Article in English | MEDLINE | ID: mdl-38932718

ABSTRACT

Objective: MSB11022 is a biosimilar of adalimumab that has been shown comparable bioequivalence, safety, tolerability, and immunogenicity profiles to the reference adalimumab in healthy volunteers or in patients with psoriasis or rheumatoid arthritis (RA). This is the first study conducted under clinical practice conditions evaluating the switch from reference adalimumab to MSB11022 in patients with RA.Methods: Retrospective and multicenter study with data from the medical records of patients with RA who switched from reference adalimumab or another biosimilar to MSB11022 and maintained this treatment for at least 6 months. Information registered comes from baseline visit, the moment of the switch, and the follow-up visits.Results: Data from 86 patients were evaluated (median age 63.5 years, 75.6% female, 44.2% had erosive RA). Only 3.5% of the patients received biologic therapy prior to adalimumab. At baseline, median DAS28-CRP was 1.77 (80.2% in remission and 96.5% with low disease activity) and median CDAI was 4.00 (44.2% in remission and 90.7% with low disease activity). After a median follow-up of 8 months, median DAS28-CRP was 1.87 (86.0% in remission and 94.2% with low disease activity) and median CDAI was 4.00 (38.5% in remission and 95.3% with low disease activity). Only three patients experienced pain, swelling, and stinging at the injection site or a locally extensive hematoma in the area of administration.Conclusions: Adalimumab biosimilar MSB11022 maintained the efficacy benefits provided by previous adalimumab treatments with a safety profile in line with that already described for other biosimilars.

2.
Arch Bronconeumol ; 2024 May 28.
Article in English, Spanish | MEDLINE | ID: mdl-38853119

ABSTRACT

BACKGROUND: Although the medium- and long-term sequelae of survivor of acute respiratory distress syndrome (ARDS) of any cause have been documented, little is known about the way in which COVID-19-induced ARDS affects functional disability and exercise components. Our aims were to examine the medium-term disability in severe COVID-19-associated ARDS survivors, delineate pathophysiological changes contributing to their exercise intolerance, and explore its utility in predicting long-term functional impairment persistence. METHODS: We studied 108 consecutive subjects with severe COVID-19 ARDS who remained alive 6 months after intensive care unit (ICU) discharge. Lung morphology was assessed with chest non-contrast CT scans and CT angiography. Functional evaluation included spirometry, plethysmography, muscle strength, and diffusion capacity, with assessment of gas exchange components through diffusing capacity of nitric oxide. Disability was assessed through an incremental exercise test, and measurements were repeated 12 and 24 months later in patients with functional impairments. RESULTS: At 6 months after ICU discharge, a notable dissociation between morphological and clinical-functional sequelae was identified. Moderate-severe disability was present in 47% of patients and these subjects had greater limitation of ventilatory mechanics and gas exchange, as well as greater symptomatic perception during exercise and a probable associated cardiac limitation. Female sex, hypothyroidism, reduced membrane diffusion component, lower functional residual capacity, and high-attenuation lung volume were independently associated with the presence of moderate-severe functional disability, which in turn was related to higher frequency and greater intensity of dyspnea and worse quality of life. Out of the 71 patients with reduced lung volumes or diffusion capacity at 6 months post-ICU discharge, only 19 maintained a restrictive disorder associated with gas exchange impairment at 24 months post-discharge. In these patients, 6-month values for diffusion membrane component, maximal oxygen uptake, ventilatory equivalent for CO2, and dead space to tidal volume ratio were identified as independent risk factors for persistence of long-term functional sequelae. CONCLUSIONS: Less than half of survivors of COVID-19 ARDS have moderate-severe disability in the medium term, identifying several risk factors. In turn, diffusion membrane component and exercise tolerance at 6-month ICU discharge are independently associated with the persistence of long-term functional sequelae.

3.
Clin Lung Cancer ; 2024 Apr 20.
Article in English | MEDLINE | ID: mdl-38825405

ABSTRACT

BACKGROUND: The 2018 ASCO pleural mesothelioma (PM) treatment guideline states that "a trial of expectant observation may be offered" in patients with asymptomatic inoperable epithelioid mesothelioma with low disease burden. The aim of our analysis was to evaluate clinical characteristics and outcomes in PM-patients managed with initial observation and deferred treatment initiation. METHODS: We retrospectively collected clinicodemograhic and outcome data of patients with inoperable PM. Patients were assigned to 2 treatment decision groups: decision to start immediate systemic treatment (Immediate Treatment Group) versus observation and deferring treatment (Deferred Treatment group). RESULTS: Of 222 patients with advanced PM, systemic treatment was started immediately in the majority of patients (189, 85%; immediate group); treatment was deferred in 33 (15%) patients (deferred group); systemic therapy was chemotherapy-based in 91% and 79% respectively. Patients in the deferred group were older (70 vs 67 years, p = .05), less likely to have stage IV disease (28% vs. 51%, p = .08) and more often had epithelioid histology (90% vs. 70%, p = .03). Nineteen patients (58%) in the deferred group eventually received treatment. With a median follow-up time of 10.9 months median overall survival (OS) in the entire cohort was 12.4 months and was significantly longer in the deferred group (20.6 months vs. 11.5 months, p = .02). No difference in median progression-free survival (PFS) in first-line treatment between groups was seen (5.4 and 5.3 months). CONCLUSION: This real-world analysis suggests that deferral of systemic therapy and close observation may not impact OS or physician-assessed PFS in selected PM-patients.

4.
Plants (Basel) ; 13(11)2024 May 27.
Article in English | MEDLINE | ID: mdl-38891286

ABSTRACT

To fulfill the growing demand for wheat consumption, it is important to focus on enhancement breeding strategies targeting key parameters such as yield, thousand kernel weight (TKW), quality characteristics including morphological traits, and protein content. These elements are key to the ongoing and future objectives of wheat breeding programs. Prioritizing these factors will effectively help meet the rising demand for wheat, especially given the challenges posed by unpredictable weather patterns. This study evaluated the morphological traits and protein content of 249 winter wheat varieties and advanced lines grown in eleven different environments in Morocco and Spain incorporating three varied sowing dates. The results showed considerable variability in morphological traits and protein content. Significant correlations were observed among various grain traits, with most grain morphological parameters exhibiting negative correlations with protein content. Differences across environments (p ≤ 0.01) in all traits, genotypes, and genotype by environment interaction were significant. A factorial regression analysis revealed significant impacts of environmental conditions on all grain morphological parameters, protein content, and TKW during the three growth stages. The study identified several high-performing and stable genotypes across diverse environments, providing valuable insights for wheat breeding programs such as genotypes 129, 234, 241, and 243. Genome-Wide Association Studies pinpointed 603 significant markers across 11 environments, spread across chromosomes. Among these, 400 markers were linked with at least two traits or observed in at least two different environments. Moreover, twelve marker-trait associations were detected that surpassed the Bonferroni correction threshold. These findings highlight the importance of targeted breeding efforts to enhance wheat quality and adaptability to different environmental conditions.

5.
Article in English | MEDLINE | ID: mdl-38904883

ABSTRACT

Stenotrophomonas maltophilia, Achromobacter xylosoxidans, and Burkholderia cenocepacia are considered emerging pathogens classified as a public health problem due to extensive antimicrobial resistance. Therefore, the discovery of new therapeutic strategies has become crucial. This study aimed to evaluate the antimicrobial activity of gallic acid and methyl gallate against non-fermenting bacteria. The study included five clinical isolates of Stenotrophomonas maltophilia, Achromobacter xylosoxidans, and Burkholderia cenocepacia. The minimum inhibitory concentrations of gallic acid and methyl gallate were determined by the broth microdilution method. Growth curves, metabolic activity, and biofilm formation of each bacterial strain in the presence or absence of phenolic compounds were performed. Finally, the therapeutic efficacy of the compounds was evaluated using an in vivo model. Gallic acid and methyl gallate showed antibacterial activity against bacterial strains in a concentration range of 64 to 256 µg/mL, both compounds reduced bacterial growth and metabolic activity of the strains, even at subinhibitory concentrations. Only, methyl gallate exhibited activity to inhibit the formation of bacterial biofilms. Moreover, gallic acid and methyl gallate increased larval survival by up to 60% compared to 30% survival of untreated larvae in a bacterial infection model in Galleria mellonella. Our results highlight the potential of gallic acid and methyl gallate as therapeutic alternatives for infections by emerging non-fermentative bacteria.

6.
Expert Rev Respir Med ; : 1-14, 2024 Jun 24.
Article in English | MEDLINE | ID: mdl-38888096

ABSTRACT

INTRODUCTION: Bronchiectasis, characterized by irreversible bronchial dilatation, is a growing global health concern with significant morbidity. This review delves into the intricate relationship between smoking and bronchiectasis, examining its epidemiology, pathophysiology, clinical manifestations, and therapeutic approaches. Our comprehensive literature search on PubMed utilized MESH terms including 'smoking,' 'smoking cessation,' 'bronchiectasis,' and 'comorbidities' to gather relevant studies. AREAS COVERED: This review emphasizes the role of smoking in bronchiectasis development and exacerbation by compromising airways and immune function. Interconnected comorbidities, including chronic obstructive pulmonary disease, asthma, and gastroesophageal reflux disease, create a detrimental cycle affecting patient outcomes. Despite limited studies on smoking cessation in bronchiectasis, the review stresses its importance. Advocating for tailored cessation programs, interventions like drainage, bronchodilators, and targeted antibiotics are crucial to disrupting the inflammatory-infection-widening cycle. EXPERT OPINION: The importance of smoking cessation in bronchiectasis management is paramount due to its extensive negative impact on related conditions. Proactive cessation programs utilizing technology and targeted education for high-risk groups aim to reduce smoking's impact on disease progression and related comorbidities. In conclusion, a personalized approach centered on smoking cessation is deemed vital for bronchiectasis, aiming to improve outcomes and enhance patients' quality of life in the face of this complex respiratory condition.

7.
Appl Clin Inform ; 2024 Jun 10.
Article in English | MEDLINE | ID: mdl-38857881

ABSTRACT

Background Clinical decision support systems (CDSS) are computer applications, which can be applied to give guidance to practitioners in antimicrobial stewardship (AS) activities, however, further information is needed for their optimal use. Objectives To analyze the implementation of a CDSS program in a primary-care hospital, describing alerts, recommendations, and the effect on consumption and clinical outcomes. Methods In October 2020, a pharmacist-driven CDSS designed for AS was implemented in a second-level hospital. The program provides a list of alerts related to antimicrobial treatment and microbiology, which were automatized for revision by the AS professionals. To analyze the implementation of the CDSS, a pre-post intervention, retrospective study was designed. AS triggered alerts and recommendations (total number and rate of acceptance) were compiled. The effect of the CDSS was measured using antimicrobial consumption, duration of antimicrobial treatments, in-hospital mortality and length of stay (LOS) for patients admitted for infectious causes. Results The AS team revised a total of 7,543 alerts and 772 patients had at least one recommendation, with an acceptance rate of 79.3%. Antimicrobial consumption decreased from 691.1 to 656.8 daily defined doses (DDD)/1,000 beds-month (P = 0.04) and the duration of antimicrobial treatment from 3.6 to 3.3 days (P <0.01). In-hospital mortality decreased from 6.6% to 6.2% (P=0.46) and mean LOS from 7.2 to 6.2 days (P<0.01) Conclusion The implementation of a CDSS resulted in a significant reduction of antimicrobial DDD, duration of antimicrobial treatments and hospital LOS. There was no significant difference in mortality.

8.
J Electrocardiol ; 85: 72-74, 2024 Jun 14.
Article in English | MEDLINE | ID: mdl-38924803

ABSTRACT

Definitive diagnosis of infective endocarditis (IE) is mainly based on microbiological and imaging criteria. In a minority of cases, particularly when perivalvular area is involved, cardiac conduction disorders (CCD) may appear, which implies worse prognosis. In this scenario, different degrees of auriculoventricular block can occur, but development of bundle branch block is rare. Herein, we present a case of IE with negative initial imaging tests, where the occurrence of phase 4 bundle branch block after a sequence of type I second degree AV block was crucial to establish a definitive diagnosis and an optimal therapeutic approach.

10.
Farm Hosp ; 2024 Jun 17.
Article in English, Spanish | MEDLINE | ID: mdl-38890066

ABSTRACT

OBJECTIVE: To design a homogeneous methodology for the registration and analysis of pharmaceutical interventions performed in Spanish critical adults' care units. METHOD: Observational, prospective and multicenter study. In the first stage, a national registry of pharmaceutical interventions will be agreed upon and subsequently all the pharmaceutical interventions performed on adult patients admitted to Spanish CCUs during eight weeks will be recorded. Variables related to the type of CCU, the drug involved in the intervention, type of intervention (indication, effectiveness, safety), recommendation made by the pharmacist and the degree of acceptance will be evaluated. Risk and incidence will be calculated for each of the medication errors detected. The χ2-squared test or Fisher exact test will be used for categorical variables and Mann-Whitney U or Kruskal-Wallis test for continuous variables. All tests will be performed with a significance level α = 0.05 and confidence intervals with confidence 1- α. DISCUSSION: The results obtained from this project will make it possible to obtain a homogeneous classification of the pharmaceutical interventions performed in CCU, a national record and an evaluation of the weak points with the aim of developing strategies for improvement in the pharmaceutical care of the critically ill patient.

12.
Arch Med Res ; 55(4): 103004, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38714041

ABSTRACT

INTRODUCTION: Huntington's disease (HD) is a genetic neurodegenerative disorder with dominant inheritance. Our center in Mexico City has offered presymptomatic testing (PT) since 1995. OBJECTIVE: To describe the main clinical and demographic characteristics of at-risk HD individuals who applied to the PT program, the reasons for seeking it, and the molecular results. METHODS: A cross-sectional study was conducted with sociodemographic and clinical data of all PT applicants from 1995-2023. Reasons for seeking PT were assessed using a modified questionnaire. In addition, anxiety, and depressive symptoms before and after PT were evaluated with Beck's instruments; cognitive impairment (CI) was assessed with the Mini-Mental State Examination (MMSE) and molecular results. RESULTS: 214 people applied for PT (2.1% of the at-risk population identified in our center); 63% were women (mean age of 37.11 years). 204 (95.3%) were accepted and 190 received results. 70% indicated that the main reason for applying for PT was to inform their offspring about the risk of inheriting HD. Significant differences were observed in the reasons for seeking PT by age group. Although some subjects received treatment, Beck's instrument scores did not indicate special attention or pharmacological treatment. The MMSE showed probable CI in 20 subjects. Of those who received results, 37% were carriers of a full penetrance allele. CONCLUSION: Our center has the only formal PT program for HD in Mexico. The reasons for seeking PT are varied and age-related. Although PT is offered to all subjects at risk for HD, uptake remains low.


Subject(s)
Huntington Disease , Humans , Huntington Disease/genetics , Huntington Disease/diagnosis , Huntington Disease/epidemiology , Female , Male , Adult , Mexico/epidemiology , Cross-Sectional Studies , Middle Aged , Genetic Testing , Young Adult
14.
Ann Clin Transl Neurol ; 11(6): 1456-1464, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38693632

ABSTRACT

OBJECTIVE: Duchenne and Becker muscular dystrophies (DMD and BMD) are dystrophinopathies caused by variants in DMD gene, resulting in reduced or absent dystrophin. These conditions, characterized by muscle weakness, also manifest central nervous system (CNS) comorbidities due to dystrophin expression in the CNS. Prior studies have indicated a higher prevalence of epilepsy in individuals with dystrophinopathy compared to the general population. Our research aimed to investigate epilepsy prevalence in dystrophinopathies and characterize associated electroencephalograms (EEGs) and seizures. METHODS: We reviewed 416 individuals with dystrophinopathy, followed up at three centers between 2010 and 2023, to investigate the lifetime epilepsy prevalence and characterize EEGs and seizures in those individuals diagnosed with epilepsy. Associations between epilepsy and type of dystrophinopathy, genotype, and cognitive involvement were studied. RESULTS: Our study revealed a higher epilepsy prevalence than the general population (1.4%; 95% confidence interval: 0.7-3.2%), but notably lower than previously reported in smaller dystrophinopathy cohorts. No significant differences were found in epilepsy prevalence between DMD and BMD or based on underlying genotypes. Cognitive impairment was not found to be linked to higher epilepsy rates. The most prevalent epilepsy types in dystrophinopathies resembled those observed in the broader pediatric population, with most individuals effectively controlled through monotherapy. INTERPRETATION: The actual epilepsy prevalence in dystrophinopathies may be markedly lower than previously estimated, possibly half or even less. Our study provides valuable insights into the epilepsy landscape in individuals with dystrophinopathy, impacting medical care, especially for those with concurrent epilepsy.


Subject(s)
Epilepsy , Muscular Dystrophy, Duchenne , Humans , Muscular Dystrophy, Duchenne/epidemiology , Muscular Dystrophy, Duchenne/complications , Muscular Dystrophy, Duchenne/genetics , Male , Epilepsy/epidemiology , Epilepsy/etiology , Adolescent , Female , Adult , Young Adult , Child , Prevalence , Middle Aged , Child, Preschool , Electroencephalography , Comorbidity , Dystrophin/genetics
15.
J Autoimmun ; 146: 103219, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38696927

ABSTRACT

Tissue repair is disturbed in fibrotic diseases like systemic sclerosis (SSc), where the deposition of large amounts of extracellular matrix components such as collagen interferes with organ function. LAIR-1 is an inhibitory collagen receptor highly expressed on tissue immune cells. We questioned whether in SSc, impaired LAIR-1-collagen interaction is contributing to the ongoing inflammation and fibrosis. We found that SSc patients do not have an intrinsic defect in LAIR-1 expression or function. Instead, fibroblasts from healthy controls and SSc patients stimulated by soluble factors that drive inflammation and fibrosis in SSc deposit disorganized collagen products in vitro, which are dysfunctional LAIR-1 ligands. This is dependent of matrix metalloproteinases and platelet-derived growth factor receptor signaling. In support of a non-redundant role of LAIR-1 in the control of fibrosis, we found that LAIR-1-deficient mice have increased skin fibrosis in response to repeated injury and in the bleomycin mouse model for SSc. Thus, LAIR-1 represents an essential control mechanism for tissue repair. In fibrotic disease, excessive collagen degradation may lead to a disturbed feedback loop. The presence of functional LAIR-1 in patients provides a therapeutic opportunity to reactivate this intrinsic negative feedback mechanism in fibrotic diseases.


Subject(s)
Collagen , Disease Models, Animal , Fibroblasts , Fibrosis , Mice, Knockout , Receptors, Immunologic , Scleroderma, Systemic , Animals , Humans , Scleroderma, Systemic/immunology , Scleroderma, Systemic/metabolism , Scleroderma, Systemic/pathology , Mice , Receptors, Immunologic/metabolism , Receptors, Immunologic/genetics , Collagen/metabolism , Fibroblasts/metabolism , Bleomycin/adverse effects , Skin/pathology , Skin/metabolism , Skin/immunology , Signal Transduction , Male , Female , Cells, Cultured
16.
Article in English | MEDLINE | ID: mdl-38695818

ABSTRACT

OBJECTIVES: The proliferation of social media has resulted in negative consequences such as fear of missing out (FoMO), the anxious feelings one has when others are having rewarding experiences. Few studies have assessed FoMO in Latinx emerging adult college students, none utilizing the socioecological framework. This study assessed the relationships between FoMO and psychological and sociocultural risk and protective factors. METHOD: Latinx college students (n = 452; Mage = 19.97 years, SD = 1.89; 77.2% female) completed an online survey assessing demographics, FoMO, social media addiction, depression, anxiety, stress, Machiavellianism, narcissism, psychopathy, familism, and acculturation. Two multiple linear regressions assessed the associations between FoMO and psychological and sociocultural factors. RESULTS: Both regressions were statistically significant. First, FoMO was positively associated with social media addiction, depression, and Machiavellianism. Second, FoMO was positively associated with familial honor and negatively associated with familial interconnectedness and ethnic social relations. CONCLUSIONS: Associations between FoMO and psychological factors are consistent with past literature, yet they highlight the need for prospective studies to assess temporality. The fact that FoMO was related uniquely to familistic attitudes suggests the importance of family in FoMO perceptions and the need to assess these associations in a more nuanced manner. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

17.
Front Med (Lausanne) ; 11: 1355803, 2024.
Article in English | MEDLINE | ID: mdl-38737760

ABSTRACT

Background: Ankylosing spondylitis (AS) is a chronic, inflammatory, and autoimmune disease. This condition primarily affects the axial skeleton and presents direct foot involvement, such as Achilles enthesitis or plantar fascia involvement. Objective: This study aimed to investigate the impact of foot health on the quality of life of individuals with AS compared to a control group without AS. Materials and methods: A sample of 112 subjects was recruited, with a mean age of 46.80 ± 10.49 years, divided into two groups: 56 individuals with AS (cases) and 56 individuals without AS (controls). Demographic data were collected, and the scores obtained in the Foot Health Status Questionnaire domains were recorded. Results: Of the participants, 27.79% (N = 30) were men and 73.21% (N = 82) were women. The mean age in the group was 46.80 ± 10.49. Significant differences (p < 0.05) were found in the domains of foot function, foot pain, footwear, overall foot health, general health-related physical activity, and social capacity between the AS group and the control group. Conclusion: Individuals with AS exhibited a decreased quality of life, as indicated by their Foot Health Status Questionnaire scores.

18.
Noncoding RNA ; 10(3)2024 May 17.
Article in English | MEDLINE | ID: mdl-38804364

ABSTRACT

Transcriptional regulation constitutes a key step in gene expression regulation. Myocyte enhancer factor 2C (MEF2C) is a transcription factor of the MADS box family involved in the early development of several cell types, including muscle cells. Over the last decade, a novel layer of complexity modulating gene regulation has emerged as non-coding RNAs have been identified, impacting both transcriptional and post-transcriptional regulation. microRNAs represent the most studied and abundantly expressed subtype of small non-coding RNAs, and their functional roles have been widely documented. On the other hand, our knowledge of the transcriptional and post-transcriptional regulatory mechanisms that drive microRNA expression is still incipient. We recently demonstrated that MEF2C is able to transactivate the long, but not short, regulatory element upstream of the miR-23a-miR-27a-miR-24-2 transcriptional start site. However, MEF2C over-expression and silencing, respectively, displayed distinct effects on each of the miR-23a-miR-27a-miR-24-2 mature cluster members without affecting pri-miRNA expression levels, thus supporting additional MEF2C-driven regulatory mechanisms. Within this study, we demonstrated a complex post-transcriptional regulatory mechanism directed by MEF2C in the regulation of miR-23a-miR-27a-miR-24-2 cluster members, distinctly involving different domains of the MEF2C transcription factor and the physical interaction with pre-miRNAs and Ksrp, HnRNPa3 and Ddx17 transcripts.

19.
Nat Commun ; 15(1): 4552, 2024 May 29.
Article in English | MEDLINE | ID: mdl-38811579

ABSTRACT

Perovskite solar cells promise to be part of the future portfolio of photovoltaic technologies, but their instability is slow down their commercialization. Major stability assessments have been recently achieved but reliable accelerated ageing tests on beyond small-area cells are still poor. Here, we report an industrial encapsulation process based on the lamination of highly viscoelastic semi-solid/highly viscous liquid adhesive atop the perovskite solar cells and modules. Our encapsulant reduces the thermomechanical stresses at the encapsulant/rear electrode interface. The addition of thermally conductive two-dimensional hexagonal boron nitride into the polymeric matrix improves the barrier and thermal management properties of the encapsulant. Without any edge sealant, encapsulated devices withstood multifaceted accelerated ageing tests, retaining >80% of their initial efficiency. Our encapsulation is applicable to the most established cell configurations (direct/inverted, mesoscopic/planar), even with temperature-sensitive materials, and extended to semi-transparent cells for building-integrated photovoltaics and Internet of Things systems.

20.
Plant Genome ; : e20463, 2024 May 19.
Article in English | MEDLINE | ID: mdl-38764204

ABSTRACT

Root architectural traits play pivotal roles in plant adaptation to drought stress, and hence they are considered promising targets in breeding programs. Here, we phenotyped eight root architecture traits in response to well-watered and drought stress conditions in 200 spring barley (Hordeum vulgare L.) inbred lines over two consecutive field seasons. Root architecture traits were less developed under drought in both seasons when compared with control treatments. Genetic variation in root architectural traits was dissected employing a genome-wide association study (GWAS) coupled with linkage disequilibrium mapping. GWAS uncovered a total of 186 significant single nucleotide polymorphism-trait associations for eight root traits under control, drought, and drought-related indices. Of these, a few loci for root traits were detected on chromosomes 3 and 5, which co-located with QTL identified in previous studies. Interestingly, 13 loci showed simultaneou associations with multiple root traits under drought and drought-related indices. These loci harbored candidate genes, which included a wide range of drought-responsive components such as transcription factors, binding proteins, protein kinases, nutrient and ion transporters, and stress signaling factors. For instance, two candidate genes, HORVU7Hr3G0713160 and HORVU6H r3G0626550, are orthologous to AtACX3 and AtVAMPs, which have reported functions in root length-mediated drought tolerance and as a key protein in abiotic stress tolerance, respectively. Interestingly, one of these loci underlying a high-confidence candidate gene NEW ENHANCER OF ROOT DWARFISM1 (NERD1) showed involvement with root development. An allelic variation of this locus in non-coding region was significantly associated with increased root length under drought. Collectively, these results offer promising multi-trait affecting loci and candidate genes underlying root phenotypic responses to drought stress, which may provide valuable resources for genetic improvement of drought tolerance in barley.

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