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Brain-Eating Amoeba From River May Have Caused Child's Death

Title: Brain-Eating Amoeba From River May Have Caused Child's Death
Category: Health News
Created: 8/19/2022 12:00:00 AM
Last Editorial Review: 8/19/2022 12:00:00 AM




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Torn ACL (Anterior Cruciate Ligament Tear)

Title: Torn ACL (Anterior Cruciate Ligament Tear)
Category: Diseases and Conditions
Created: 11/4/2010 12:00:00 AM
Last Editorial Review: 8/15/2022 12:00:00 AM




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More Athletes Are Getting Their Nutrition Through an IV. This Should Stop, Experts Say

Title: More Athletes Are Getting Their Nutrition Through an IV. This Should Stop, Experts Say
Category: Health News
Created: 8/17/2022 12:00:00 AM
Last Editorial Review: 8/18/2022 12:00:00 AM




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9 in 10 Americans Want Their Health Info Kept Private

Title: 9 in 10 Americans Want Their Health Info Kept Private
Category: Health News
Created: 8/2/2022 12:00:00 AM
Last Editorial Review: 8/2/2022 12:00:00 AM




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Too Few U.S. Cities Have Good Hurricane Evacuation Plans

Title: Too Few U.S. Cities Have Good Hurricane Evacuation Plans
Category: Health News
Created: 8/26/2022 12:00:00 AM
Last Editorial Review: 8/26/2022 12:00:00 AM




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Lamisil (terbinafine) vs. Lotrimin (clotrimazole)

Title: Lamisil (terbinafine) vs. Lotrimin (clotrimazole)
Category: Medications
Created: 6/10/2019 12:00:00 AM
Last Editorial Review: 8/10/2022 12:00:00 AM




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7 Surprising Goat Milk Soap Benefits

Title: 7 Surprising Goat Milk Soap Benefits
Category: Health and Living
Created: 8/12/2022 12:00:00 AM
Last Editorial Review: 8/12/2022 12:00:00 AM




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Up Your Skin Care Routine During Hot Summer Months

Title: Up Your Skin Care Routine During Hot Summer Months
Category: Health News
Created: 8/13/2022 12:00:00 AM
Last Editorial Review: 8/15/2022 12:00:00 AM




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Nerve Block Plus Lidocaine Clears Psoriasis in Small Study

Title: Nerve Block Plus Lidocaine Clears Psoriasis in Small Study
Category: Health News
Created: 8/15/2022 12:00:00 AM
Last Editorial Review: 8/16/2022 12:00:00 AM




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Ketoconazole cream vs. clotrimazole cream

Title: Ketoconazole cream vs. clotrimazole cream
Category: Medications
Created: 5/29/2019 12:00:00 AM
Last Editorial Review: 8/25/2022 12:00:00 AM




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How Do I Make My Ears Stop Ringing?

Title: How Do I Make My Ears Stop Ringing?
Category: Diseases and Conditions
Created: 5/10/2022 12:00:00 AM
Last Editorial Review: 5/10/2022 12:00:00 AM




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Cheaper Over-the-Counter Hearing Aids Should Be in Stores by October, FDA Says

Title: Cheaper Over-the-Counter Hearing Aids Should Be in Stores by October, FDA Says
Category: Health News
Created: 8/16/2022 12:00:00 AM
Last Editorial Review: 8/17/2022 12:00:00 AM




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HIV Testing Plummeted During Pandemic

Title: HIV Testing Plummeted During Pandemic
Category: Health News
Created: 6/27/2022 12:00:00 AM
Last Editorial Review: 6/27/2022 12:00:00 AM




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COVID Crisis Has Stalled Fight Against HIV/AIDS

Title: COVID Crisis Has Stalled Fight Against HIV/AIDS
Category: Health News
Created: 7/28/2022 12:00:00 AM
Last Editorial Review: 7/29/2022 12:00:00 AM




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Experimental Drug May Ease Hot Flashes

Title: Experimental Drug May Ease Hot Flashes
Category: Health News
Created: 6/13/2022 12:00:00 AM
Last Editorial Review: 6/14/2022 12:00:00 AM




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Menopause Linked With Higher Alzheimer's Risk

Title: Menopause Linked With Higher Alzheimer's Risk
Category: Health News
Created: 6/30/2022 12:00:00 AM
Last Editorial Review: 6/30/2022 12:00:00 AM




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When Is Blood Pressure Lowest and Highest During the Day?

Title: When Is Blood Pressure Lowest and Highest During the Day?
Category: Diseases and Conditions
Created: 7/26/2022 12:00:00 AM
Last Editorial Review: 7/26/2022 12:00:00 AM




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Why Is My Period More Heavy Than Usual?

Title: Why Is My Period More Heavy Than Usual?
Category: Diseases and Conditions
Created: 6/28/2022 12:00:00 AM
Last Editorial Review: 6/28/2022 12:00:00 AM




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How Do I Know if I Have an Ovarian Cyst or Tumor?

Title: How Do I Know if I Have an Ovarian Cyst or Tumor?
Category: Diseases and Conditions
Created: 7/7/2022 12:00:00 AM
Last Editorial Review: 7/7/2022 12:00:00 AM




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Vegetarian Women at Higher Odds for Hip Fracture

Title: Vegetarian Women at Higher Odds for Hip Fracture
Category: Health News
Created: 8/11/2022 12:00:00 AM
Last Editorial Review: 8/12/2022 12:00:00 AM




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Scotland Becomes 1st Country to Provide Free Period Products

Title: Scotland Becomes 1st Country to Provide Free Period Products
Category: Health News
Created: 8/15/2022 12:00:00 AM
Last Editorial Review: 8/16/2022 12:00:00 AM




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Who Fares Worse After Multiple Sclerosis Strikes?

Title: Who Fares Worse After Multiple Sclerosis Strikes?
Category: Health News
Created: 8/11/2022 12:00:00 AM
Last Editorial Review: 8/12/2022 12:00:00 AM




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There's More MS in Northern Countries. Now, Researchers Find New Reason Why

Title: There's More MS in Northern Countries. Now, Researchers Find New Reason Why
Category: Health News
Created: 8/25/2022 12:00:00 AM
Last Editorial Review: 8/25/2022 12:00:00 AM




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New Multiple Sclerosis Treatment Shows Promise in Trial

Title: New Multiple Sclerosis Treatment Shows Promise in Trial
Category: Health News
Created: 8/25/2022 12:00:00 AM
Last Editorial Review: 8/26/2022 12:00:00 AM




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U.S. HPV Vaccination Rates Rising, Even Among Boys

Title: U.S. HPV Vaccination Rates Rising, Even Among Boys
Category: Health News
Created: 6/22/2022 12:00:00 AM
Last Editorial Review: 6/23/2022 12:00:00 AM




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Vaccines Have Slashed Rates of HPV Infection in Young American Women

Title: Vaccines Have Slashed Rates of HPV Infection in Young American Women
Category: Health News
Created: 8/22/2022 12:00:00 AM
Last Editorial Review: 8/23/2022 12:00:00 AM




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Cyclobenzaprine vs. Xanax (alprazolam)

Title: Cyclobenzaprine vs. Xanax (alprazolam)
Category: Medications
Created: 6/6/2019 12:00:00 AM
Last Editorial Review: 8/25/2022 12:00:00 AM




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Bedsores Can Cause Serious Harm — Are U.S. Nursing Homes Hiding Cases?

Title: Bedsores Can Cause Serious Harm — Are U.S. Nursing Homes Hiding Cases?
Category: Health News
Created: 8/17/2022 12:00:00 AM
Last Editorial Review: 8/18/2022 12:00:00 AM




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AHA News: How You Feel About Aging Could Affect Health. Here's How to Keep the Right Attitude.

Title: AHA News: How You Feel About Aging Could Affect Health. Here's How to Keep the Right Attitude.
Category: Health News
Created: 8/19/2022 12:00:00 AM
Last Editorial Review: 8/19/2022 12:00:00 AM




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Health Care Plans Keep Allergy Rescue Injectors Pricey for Some

Title: Health Care Plans Keep Allergy Rescue Injectors Pricey for Some
Category: Health News
Created: 7/15/2022 12:00:00 AM
Last Editorial Review: 7/15/2022 12:00:00 AM




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Prehistoric People Drank Animal Milk, Despite Lactose Intolerance

Title: Prehistoric People Drank Animal Milk, Despite Lactose Intolerance
Category: Health News
Created: 7/27/2022 12:00:00 AM
Last Editorial Review: 7/28/2022 12:00:00 AM




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pseudoephedrine

Title: pseudoephedrine
Category: Medications
Created: 8/9/2022 12:00:00 AM
Last Editorial Review: 8/9/2022 12:00:00 AM




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SIBO (Small Intestinal Bacterial Overgrowth)

Title: SIBO (Small Intestinal Bacterial Overgrowth)
Category: Diseases and Conditions
Created: 10/28/2005 12:00:00 AM
Last Editorial Review: 8/8/2022 12:00:00 AM




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rimantadine

Title: rimantadine
Category: Medications
Created: 1/25/1999 12:00:00 AM
Last Editorial Review: 6/16/2022 12:00:00 AM




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How to Get Rid of Mucus in My Chest Fast

Title: How to Get Rid of Mucus in My Chest Fast
Category: Diseases and Conditions
Created: 6/22/2022 12:00:00 AM
Last Editorial Review: 6/22/2022 12:00:00 AM




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Australia's Current Flu Season Is Tough: Will America's Be the Same?

Title: Australia's Current Flu Season Is Tough: Will America's Be the Same?
Category: Health News
Created: 8/4/2022 12:00:00 AM
Last Editorial Review: 8/5/2022 12:00:00 AM




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How Do I Get Rid of Winter Depression?

Title: How Do I Get Rid of Winter Depression?
Category: Diseases and Conditions
Created: 4/27/2022 12:00:00 AM
Last Editorial Review: 4/27/2022 12:00:00 AM




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Smoking Rates Drop for Americans Battling Depression, Substance Abuse

Title: Smoking Rates Drop for Americans Battling Depression, Substance Abuse
Category: Health News
Created: 4/27/2022 12:00:00 AM
Last Editorial Review: 4/27/2022 12:00:00 AM




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Evidence-based management of symptoms in serious respiratory illness: what is in our toolbox?

Extract

Living with a respiratory illness requires patients to manage a wide range of symptoms, many of which will worsen as a disease progresses. Breathlessness is a hallmark feature of respiratory conditions, occurring in almost all individuals with COPD and interstitial lung disease (ILD) [1, 2]. Cough is present in 78% of people with ILD and is frequently distressing, with physical, social and emotional impacts [1, 3].




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Impaired lung function and associated risk factors in children born prematurely: a systematic review and meta-analysis

Background

Immature lung development and respiratory morbidity place preterm-born children at high risk of long-term pulmonary sequelae. This systematic review and meta-analysis aims to quantify lung function in preterm-born children and identify risk factors for a compromised lung function.

Methods

We searched MEDLINE, Embase, Cochrane Library, Web of Science and Scopus for relevant studies published on preterm cohorts born since 1990. Studies comparing forced expiratory volume in 1 s (FEV1) in preterm-born children aged ≥5 years to term-born controls or normative data were included. Study quality was assessed using the Newcastle–Ottawa Scale for cohort studies. Standardised mean differences in FEV1 and secondary spirometry outcomes per study were pooled using meta-analysis. The impact of different demographic and neonatal variables on studies’ FEV1 effect sizes was investigated by meta-regression analyses. Certainty of evidence was assessed using the Grading of Recommendations, Assessment, Development, and Evaluations framework.

Results

We identified 42 studies with unique cohorts including 4743 preterm children and 9843 controls. Median gestational age in the studies was 28.0 weeks and age at assessment ranged from 6.7 to 16.7 years. Preterm children had lower FEV1 than controls (–0.58 sd, 95% CI –0.69– –0.47 sd, p<0.001) resulting in a relative risk of 2.9 (95% CI 2.4–3.4) for abnormal outcome, with high certainty of evidence. FEV1 was significantly associated with gestational age, birthweight, bronchopulmonary dysplasia and invasive mechanical ventilation in univariate meta-regression analyses (R2=36–96%).

Conclusion

This systematic review shows robust evidence of impaired lung function in preterm-born children with a high certainty of evidence.




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Multicomponent services for symptoms in serious respiratory illness: a systematic review and meta-analysis

Background

People living with serious respiratory illness experience a high burden of symptoms. This review aimed to determine whether multicomponent services reduce symptoms in people with serious illness related to respiratory disease.

Methods

Electronic databases were searched to identify randomised controlled trials (RCTs) evaluating multicomponent services that enrolled patients due to symptoms, rather than underlying disease, and provided at least one nonpharmacological intervention. The primary outcome was chronic breathlessness and secondary outcomes were health-related quality of life (HRQoL), cough, fatigue and adverse events. At least two authors independently screened studies, assessed risk of bias and extracted data.

Results

Five RCTs, involving 439 patients, were included. In comparison to usual care, multicomponent services improved breathlessness mastery (Chronic Respiratory Questionnaire (CRQ) mastery scale, mean difference (MD) 0.43 points, 95% CI 0.20–0.67, three RCTs, 327 participants) and HRQoL (CRQ total score, MD 0.24 points, 95% CI 0.04–0.40, two RCTs, 237 participants). Fatigue did not improve with multicomponent services and no studies evaluated cough. No serious adverse events were reported. The one study evaluating mortality found increased survival in those accessing a multicomponent service. The certainty of evidence was very low, mainly due to detection and reporting bias.

Conclusion

Multicomponent services improve breathlessness mastery and HRQoL, with minimal risk. These findings support the use of multicomponent symptom-directed services for people living with serious respiratory illness.




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The effect of graded exercise therapy on fatigue in people with serious respiratory illness: a systematic review

Background

In adults with serious respiratory illness, fatigue is prevalent and under-recognised, with few treatment options. The aim of this review was to assess the impact of graded exercise therapy (GET) on fatigue in adults with serious respiratory illness.

Methods

Electronic databases were searched to identify randomised controlled trials (RCTs) testing GET (involving incremental increases in exercise from an established baseline) in adults with serious respiratory illness. The primary outcome was fatigue and secondary outcomes were health-related quality of life (HRQoL) and adverse events. Two authors independently screened for inclusion, evaluated risk of bias and extracted data.

Results

76 RCTs were included with 3309 participants, most with a diagnosis of COPD or asthma. Reductions in fatigue measured by the Chronic Respiratory Disease Questionnaire fatigue domain score were demonstrated following GET consisting of aerobic with/without resistance training (mean difference (MD) 0.53 points, 95% CI 0.41–0.65, 11 RCTs, 624 participants) and GET using resistance training alone (MD 0.58 points, 95% CI 0.21–0.96, two RCTs, 82 participants) compared with usual care. Although the mean effect exceeded the minimal important difference, the lower end of the confidence intervals did not always exceed this threshold so the clinical significance could not be confirmed. GET consistently improved HRQoL in people with a range of chronic respiratory diseases on multiple HRQoL measures. No serious adverse events related to GET were reported.

Conclusion

GET may improve fatigue alongside consistent improvements in HRQoL in people with serious respiratory illness. These findings support the use of GET in the care of people with serious respiratory illness.




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Breathing techniques to reduce symptoms in people with serious respiratory illness: a systematic review

Background

In adults with serious respiratory illness, breathlessness is prevalent and associated with reduced health-related quality of life. The aim of this review was to assess the impact of breathing techniques on breathlessness in adults with serious respiratory illness.

Methods

Electronic databases were searched to identify randomised controlled trials testing breathing techniques (techniques that aim to alter the respiratory pattern, excluding respiratory muscle training) in people with serious respiratory illness. The primary outcome was breathlessness and secondary outcomes were health-related quality of life and adverse events. Two authors independently screened for inclusion, evaluated risk of bias and extracted data.

Results

73 randomised controlled trials were included with 5479 participants, most with COPD or asthma. Breathing exercises (pursed lip and/or diaphragmatic breathing) reduced breathlessness measured by the modified Medical Research Council scale compared to usual care (mean difference (MD) –0.40 points, 95% CI –0.70– –0.11, eight studies, n=323), although the effect did not exceed the minimal important difference. Yoga breathing also improved modified Medical Research Council score compared to usual care (MD –1.05 points, 95% CI –2.45–0.35, three studies, n=175). Breathing techniques consistently improved health-related quality of life in people with COPD and asthma on multiple health-related quality of life measures in comparison to usual care, with effects that generally exceeded the minimal important difference. No adverse events related to breathing techniques were reported.

Conclusion

Breathing techniques may improve breathlessness, and consistently improve health-related quality of life, in people with serious respiratory illness. These findings support the use of breathing exercises in the care of people with serious respiratory illness.




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Opioids for the palliation of symptoms in people with serious respiratory illness: a systematic review and meta-analysis

Background

People living with serious respiratory illness experience a high burden of distressing symptoms. Although opioids are prescribed for symptom management, they generate adverse events, and their benefits are unclear.

Methods

We examined the efficacy and safety of opioids for symptom management in people with serious respiratory illness. Embase, MEDLINE and the Cochrane Central Register of Controlled Trials were searched up to 11 July 2022. Reports of randomised controlled trials administering opioids to treat symptoms in people with serious respiratory illness were included. Key exclusion criteria included <80% of participants having a nonmalignant lung disease. Data were extracted regarding study characteristics, outcomes of breathlessness, cough, health-related quality of life (HRQoL) and adverse events. Treatment effects were pooled using a generic inverse variance model with random effects. Risk of bias was assessed using the Cochrane Risk of Bias tool version 1.

Results

Out of 17 included trials, six were laboratory-based exercise trials (n=70), 10 were home studies measuring breathlessness in daily life (n=788) and one (n=18) was conducted in both settings. Overall certainty of evidence was "very low" to "low". Opioids reduced breathlessness intensity during laboratory exercise testing (standardised mean difference (SMD) –0.37, 95% CI –0.67– –0.07), but not breathlessness measured in daily life (SMD –0.10, 95% CI –0.64–0.44). No effects on HRQoL (SMD –0.42, 95% CI –0.98–0.13) or cough (SMD –1.42, 95% CI –3.99–1.16) were detected. In at-home studies, opioids led to increased frequency of nausea/vomiting (OR 3.32, 95% CI 1.70–6.51), constipation (OR 3.08, 95% CI 1.69–5.61) and drowsiness (OR 1.37, 95% CI 1.01–1.86), with serious adverse events including hospitalisation and death identified.

Conclusions

Opioids improved exertional breathlessness in laboratory exercise studies, but did not improve breathlessness, cough or HRQoL measured in daily life at home. There were significant adverse events, which may outweigh any benefits.




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PWAS Hub for exploring gene-based associations of common complex diseases [RESOURCES]

PWAS (proteome-wide association study) is an innovative genetic association approach that complements widely used methods like GWAS (genome-wide association study). The PWAS approach involves consecutive phases. Initially, machine learning modeling and probabilistic considerations quantify the impact of genetic variants on protein-coding genes’ biochemical functions. Secondly, for each individual, aggregating the variants per gene determines a gene-damaging score. Finally, standard statistical tests are activated in the case-control setting to yield statistically significant genes per phenotype. The PWAS Hub offers a user-friendly interface for an in-depth exploration of gene–disease associations from the UK Biobank (UKB). Results from PWAS cover 99 common diseases and conditions, each with over 10,000 diagnosed individuals per phenotype. Users can explore genes associated with these diseases, with separate analyses conducted for males and females. For each phenotype, the analyses account for sex-based genetic effects, inheritance modes (dominant and recessive), and the pleiotropic nature of associated genes. The PWAS Hub showcases its usefulness for asthma by navigating through proteomic-genetic analyses. Inspecting PWAS asthma-listed genes (a total of 27) provide insights into the underlying cellular and molecular mechanisms. Comparison of PWAS-statistically significant genes for common diseases to the Open Targets benchmark shows partial but significant overlap in gene associations for most phenotypes. Graphical tools facilitate comparing genetic effects between PWAS and coding GWAS results, aiding in understanding the sex-specific genetic impact on common diseases. This adaptable platform is attractive to clinicians, researchers, and individuals interested in delving into gene–disease associations and sex-specific genetic effects.




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Theoretical framework for the difference of two negative binomial distributions and its application in comparative analysis of sequencing data [METHODS]

High-throughput sequencing (HTS) technologies have been instrumental in investigating biological questions at the bulk and single-cell levels. Comparative analysis of two HTS data sets often relies on testing the statistical significance for the difference of two negative binomial distributions (DOTNB). Although negative binomial distributions are well studied, the theoretical results for DOTNB remain largely unexplored. Here, we derive basic analytical results for DOTNB and examine its asymptotic properties. As a state-of-the-art application of DOTNB, we introduce DEGage, a computational method for detecting differentially expressed genes (DEGs) in scRNA-seq data. DEGage calculates the mean of the sample-wise differences of gene expression levels as the test statistic and determines significant differential expression by computing the P-value with DOTNB. Extensive validation using simulated and real scRNA-seq data sets demonstrates that DEGage outperforms five popular DEG analysis tools: DEGseq2, DEsingle, edgeR, Monocle3, and scDD. DEGage is robust against high dropout levels and exhibits superior sensitivity when applied to balanced and imbalanced data sets, even with small sample sizes. We utilize DEGage to analyze prostate cancer scRNA-seq data sets and identify marker genes for 17 cell types. Furthermore, we apply DEGage to scRNA-seq data sets of mouse neurons with and without fear memory and reveal eight potential memory-related genes overlooked in previous analyses. The theoretical results and supporting software for DOTNB can be widely applied to comparative analyses of dispersed count data in HTS and broad research questions.




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Contrasting and combining transcriptome complexity captured by short and long RNA sequencing reads [METHODS]

Mapping transcriptomic variations using either short- or long-read RNA sequencing is a staple of genomic research. Long reads are able to capture entire isoforms and overcome repetitive regions, whereas short reads still provide improved coverage and error rates. Yet, open questions remain, such as how to quantitatively compare the technologies, can we combine them, and what is the benefit of such a combined view? We tackle these questions by first creating a pipeline to assess matched long- and short-read data using a variety of transcriptome statistics. We find that across data sets, algorithms, and technologies, matched short-read data detects ~30% more splice junctions, such that ~10%–30% of the splice junctions included at ≥20% by short reads are missed by long reads. In contrast, long reads detect many more intron-retention events and can detect full isoforms, pointing to the benefit of combining the technologies. We introduce MAJIQ-L, an extension of the MAJIQ software, to enable a unified view of transcriptome variations from both technologies and demonstrate its benefits. Our software can be used to assess any future long-read technology or algorithm and can be combined with short-read data for improved transcriptome analysis.




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Systematic identification of interchromosomal interaction networks supports the existence of specialized RNA factories [METHODS]

Most studies of genome organization have focused on intrachromosomal (cis) contacts because they harbor key features such as DNA loops and topologically associating domains. Interchromosomal (trans) contacts have received much less attention, and tools for interrogating potential biologically relevant trans structures are lacking. Here, we develop a computational framework that uses Hi-C data to identify sets of loci that jointly interact in trans. This method, trans-C, initiates probabilistic random walks with restarts from a set of seed loci to traverse an input Hi-C contact network, thereby identifying sets of trans-contacting loci. We validate trans-C in three increasingly complex models of established trans contacts: the Plasmodium falciparum var genes, the mouse olfactory receptor "Greek islands," and the human RBM20 cardiac splicing factory. We then apply trans-C to systematically test the hypothesis that genes coregulated by the same trans-acting element (i.e., a transcription or splicing factor) colocalize in three dimensions to form "RNA factories" that maximize the efficiency and accuracy of RNA biogenesis. We find that many loci with multiple binding sites of the same DNA-binding proteins interact with one another in trans, especially those bound by factors with intrinsically disordered domains. Similarly, clustered binding of a subset of RNA-binding proteins correlates with trans interaction of the encoding loci. We observe that these trans-interacting loci are close to nuclear speckles. These findings support the existence of trans-interacting chromatin domains (TIDs) driven by RNA biogenesis. Trans-C provides an efficient computational framework for studying these and other types of trans interactions, empowering studies of a poorly understood aspect of genome architecture.




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Global characterization of somatic mutations and DNA methylation changes during vegetative propagation in strawberries [RESEARCH]

Somatic mutations arise and accumulate during tissue culture and vegetative propagation, potentially affecting various traits in horticultural crops, but their characteristics are still unclear. Here, somatic mutations in regenerated woodland strawberry derived from tissue culture of shoot tips under different conditions and 12 cultivated strawberry individuals are analyzed by whole genome sequencing. The mutation frequency of single nucleotide variants is significantly increased with increased hormone levels or prolonged culture time in the range of 3.3 x 10–8–3.0 x 10–6 mutations per site. CG methylation shows a stable reduction (0.71%–8.03%) in regenerated plants, and hypoCG-DMRs are more heritable after sexual reproduction. A high-quality haplotype-resolved genome is assembled for the strawberry cultivar "Beni hoppe." The 12 "Beni hoppe" individuals randomly selected from different locations show 4731–6005 mutations relative to the reference genome, and the mutation frequency varies among the subgenomes. Our study has systematically characterized the genetic and epigenetic variants in regenerated woodland strawberry plants and different individuals of the same strawberry cultivar, providing an accurate assessment of somatic mutations at the genomic scale and nucleotide resolution in plants.




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Mutational scanning of CRX classifies clinical variants and reveals biochemical properties of the transcriptional effector domain [RESEARCH]

The transcription factor (TF) cone-rod homeobox (CRX) is essential for the differentiation and maintenance of photoreceptor cell identity. Several human CRX variants cause degenerative retinopathies, but most are variants of uncertain significance. We performed a deep mutational scan (DMS) of nearly all possible single amino acid substitutions in CRX using a cell-based transcriptional reporter assay, curating a high-confidence list of nearly 2000 variants with altered transcriptional activity. In the structured homeodomain, activity scores closely aligned to a predicted structure and demonstrated position-specific constraints on amino acid substitution. In contrast, the intrinsically disordered transcriptional effector domain displayed a qualitatively different pattern of substitution effects, following compositional constraints without specific residue position requirements in the peptide chain. These compositional constraints were consistent with the acidic exposure model of transcriptional activation. We evaluated the performance of the DMS assay as a clinical variant classification tool using gold-standard classified human variants from ClinVar, identifying pathogenic variants with high specificity and moderate sensitivity. That this performance could be achieved using a synthetic reporter assay in a foreign cell type, even for a highly cell type-specific TF like CRX, suggests that this approach shows promise for DMS of other TFs that function in cell types that are not easily accessible. Together, the results of the CRX DMS identify molecular features of the CRX effector domain and demonstrate utility for integration into the clinical variant classification pipeline.