Publications by authors named "K-S Chang"

The advent of spatial transcriptomics and spatial proteomics have enabled profound insights into tissue organization to provide systems-level understanding of diseases. Both technologies currently remain largely independent, and emerging same slide spatial multi-omics approaches are generally limited in plex, spatial resolution, and analytical approaches. We introduce IN-situ DEtailed Phenotyping To High-resolution transcriptomics (IN-DEPTH), a streamlined and resource-effective approach compatible with various spatial platforms.

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Somatic mosaicism is an important cause of disease, but mosaic and somatic variants are often challenging to detect because they exist in only a fraction of cells. To address the need for benchmarking subclonal variants in normal cell populations, we developed a benchmark containing mosaic variants in the Genome in a Bottle Consortium (GIAB) HG002 reference material DNA from a large batch of a normal lymphoblastoid cell line. First, we used a somatic variant caller with high coverage (300x) Illumina whole genome sequencing data from the Ashkenazi Jewish trio to detect variants in HG002 not detected in at least 5% of cells from the combined parental data.

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Circular RNAs (circRNAs) are covalently closed single-stranded RNAs produced predominantly through a back-splicing process. They play regulatory roles in various biological and physiological processes; however, the molecular mechanisms by which circRNAs operate remain unclear. Herein, we demonstrate that circRNAs facilitate rapid mRNA degradation through RNA-RNA interactions between circRNAs and the 3' untranslated regions (3' UTRs) of mRNAs.

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Article Synopsis
  • The study aimed to analyze treatment patterns for childhood glaucoma in the U.S. by examining patient records from 2013 to 2020.
  • It included 3069 patients, revealing that only 16.1% underwent surgery while 93.6% were treated with medications, with specific procedures varying based on the type of glaucoma.
  • Key factors influencing the need for surgeries included having primary congenital glaucoma, higher intraocular pressure, and being younger than one year at diagnosis.
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Living in isolation is associated with a lack of stimulating experiences, which negatively impacts quality of life and increases risk of advancing cognitive decline for older adults. We examined how engaging in unique events would enhance memory and improve well-being during the COVID-19 pandemic lockdowns, a period characterized by social isolation and monotonous daily experiences lacking diversity. Over 8-weeks during lockdowns, 18 healthy older adults used a smartphone-based application called "HippoCamera", capturing a total of 670 unique and routine events with short audio-video cues that were later replayed to prompt memory.

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  • Scientists used special data from a detector to look for rare particle decays of a type called the D_{s}^{+} decay, focusing on how it might change into other particles like kaons or pions.
  • They found strong evidence for the decay D_{s}^{+}→π^{+}ϕ and also discovered a new decay D_{s}^{+}→ρ^{+}ϕ, both involving particles that decay into pairs of electrons.
  • However, they didn't find strong signals for three other types of decays they were looking for, and set limits on how often those changes could happen.
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  • Accurate genome assemblies are crucial for biological research, but they often have errors due to the technologies used, necessitating polishing steps to correct these mistakes.
  • The new model, DeepPolisher, utilizes Pacbio HiFi read alignments and a method called PHARAOH to improve sequences by accurately addressing haplotypes and correcting errors in areas previously thought to be homozygous.
  • Testing DeepPolisher on 180 assemblies from the Human Pangenome Reference Consortium showed a significant reduction in assembly errors, achieving an average improvement of 54% in error reduction with a predicted Quality Value increase of 3.4.
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  • Extensive docking of large libraries of molecules led to finding PAMs that are significantly more effective than previous options, with improved potency.
  • One identified PAM showed 100-fold greater potency than the current standard treatment (cinacalcet) in tests, without the common side effect of low calcium levels.
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Somatic variant detection is an integral part of cancer genomics analysis. While most methods have focused on short-read sequencing, long-read technologies now offer potential advantages in terms of repeat mapping and variant phasing. We present DeepSomatic, a deep learning method for detecting somatic SNVs and insertions and deletions (indels) from both short-read and long-read data, with modes for whole-genome and exome sequencing, and able to run on tumor-normal, tumor-only, and with FFPE-prepared samples.

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  • * Researchers used cryogenic electron microscopy to reveal the structure of an ANV-like particle, which is made up of 60 capsid proteins forming an icosahedral shape with crown-like spikes.
  • * The spike structure may help ANVs evade the immune system by concealing essential parts while showcasing diverse regions to confuse antibodies, offering insights into their immune interactions.
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  • Focal segmental glomerulosclerosis (FSGS) is a major cause of kidney failure and can reoccur after transplantation, leading to poor outcomes, prompting research into bleselumab, a drug targeting the CD40 pathway, to prevent recurrent FSGS.
  • A phase 2a study tested bleselumab combined with standard immunosuppressants in kidney transplant patients with a history of FSGS, comparing its effectiveness to the standard care regimen over 12 months.
  • The study found no significant difference in the recurrence of FSGS between bleselumab and standard care, though bleselumab showed a slight decrease in proteinuria,
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  • The study looked at a rare heart condition called R-AAOCA, where the right coronary artery starts from the left side, and its possible link to sudden cardiac death.
  • They checked data from a lot of heart scans (over 89,000) but ended up focusing on 224 patients who had the specific condition and were followed for a while.
  • They found that out of those patients, only a few experienced serious heart problems, and none actually died suddenly, showing that this condition alone might not be a major risk for sudden death.
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Long-read sequencing technology has enabled variant detection in difficult-to-map regions of the genome and enabled rapid genetic diagnosis in clinical settings. Rapidly evolving third-generation sequencing platforms like Pacific Biosciences (PacBio) and Oxford Nanopore Technologies (ONT) are introducing newer platforms and data types. It has been demonstrated that variant calling methods based on deep neural networks can use local haplotyping information with long-reads to improve the genotyping accuracy.

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Background: Despite recent drug development for non-muscle invasive bladder cancer (NMIBC), few therapies have been approved by the US Food and Drug Administration (FDA), and there remains an unmet clinical need. Bacillus Calmette-Guerin (BCG) supply issues underscore the importance of developing safe and effective drugs for NMIBC.

Objective: On November 18-19, 2021, the FDA held a public virtual workshop to discuss NMIBC research needs and potential trial designs for future development of effective therapies.

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Radiographic assessment plays a crucial role in the management of patients with central nervous system (CNS) tumors, aiding in treatment planning and evaluation of therapeutic efficacy by quantifying response. Recently, an updated version of the Response Assessment in Neuro-Oncology (RANO) criteria (RANO 2.0) was developed to improve upon prior criteria and provide an updated, standardized framework for assessing treatment response in clinical trials for gliomas in adults.

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Based on (10087±44)×10^{6}  J/ψ events collected with the BESIII detector, a partial wave analysis of the decay J/ψ→γK_{S}^{0}K_{S}^{0}η^{'} is performed. The mass and width of the X(2370) are measured to be 2395±11(stat)_{-94}^{+26}(syst)  MeV/c^{2} and 188_{-17}^{+18}(stat)_{-33}^{+124}(syst)  MeV, respectively. The corresponding product branching fraction is B[J/ψ→γX(2370)]×B[X(2370)→f_{0}(980)η^{'}]×B[f_{0}(980)→K_{S}^{0}K_{S}^{0}]=(1.

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Sulfonated lignin-based dye dispersants have intensively attracted attention due to their low cost, renewability and abundant sources. However, their utilization is limited by the low content of sulfonic groups and high content of hydroxyl groups in their complex lignin structure, which results in various problems such as high reducing rate of dye, severe staining of the fibers and uneven dyeing. Here, the multi-site sulfonated lignin-based dispersants were prepared with high sulfonic group content (2.

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We perform for the first time an amplitude analysis of the decay D^{+}→K_{S}^{0}π^{+}η and report the observation of the decay D^{+}→K_{S}^{0}a_{0}(980)^{+} using 2.93  fb^{-1} of e^{+}e^{-} collision data taken at a center-of-mass energy of 3.773 GeV with the BESIII detector.

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We present cross sections for the reaction e^{+}e^{-}→K_{S}^{0}K_{L}^{0} at center-of-mass energies ranging from 3.51 to 4.95 GeV using data samples collected in the BESIII experiment, corresponding to a total integrated luminosity of 26.

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Most current studies rely on short-read sequencing to detect somatic structural variation (SV) in cancer genomes. Long-read sequencing offers the advantage of better mappability and long-range phasing, which results in substantial improvements in germline SV detection. However, current long-read SV detection methods do not generalize well to the analysis of somatic SVs in tumor genomes with complex rearrangements, heterogeneity, and aneuploidy.

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  • Akkermansia muciniphila is important for gut health as it aids in gut immunity, intestinal development, and barrier integrity.
  • The study focuses on a newly discovered protein, Amuc_1409, secreted by A. muciniphila, which enhances intestinal stem cell (ISC) growth and recovery in both lab models and aging male mice.
  • Amuc_1409 works by interacting with E-cadherin, activating Wnt/β-catenin signaling, and is suggested as a potential biological agent for promoting gut health.
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Mammalian switch/sucrose nonfermentable (mSWI/SNF) ATPase degraders have been shown to be effective in enhancer-driven cancers by functioning to impede oncogenic transcription factor chromatin accessibility. Here, we developed AU-24118, an orally bioavailable proteolysis-targeting chimera (PROTAC) degrader of mSWI/SNF ATPases (SMARCA2 and SMARCA4) and PBRM1. AU-24118 demonstrated tumor regression in a model of castration-resistant prostate cancer (CRPC) which was further enhanced with combination enzalutamide treatment, a standard of care androgen receptor (AR) antagonist used in CRPC patients.

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In 2015 and 2016, two Barramundi () farms in Singapore reported a disease outbreak characterized by lethargic behavior, pronounced inappetence, generalized skin lesions, erosions of the fins and tail, and ultimately high mortality in their fish. Next-generation sequencing and PCR confirmed presence of a novel virus belonging to the family, herpesvirus (LCHV), which was subsequently isolated and cultured. We characterize, for the first time, the complete genome of two cultured LCHV isolates.

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3-dimensional (3D) genome conformation is central to gene expression regulation, yet our understanding of its contribution to rapid transcriptional responses, signal integration, and memory in immune cells is limited. Here, we study the molecular regulation of the inflammatory response in primary macrophages using integrated transcriptomic, epigenomic, and chromosome conformation data, including base pair-resolution Micro-Capture C. We demonstrate that interleukin-4 (IL-4) primes the inflammatory response in macrophages by stably rewiring 3D genome conformation, juxtaposing endotoxin-, interferon-gamma-, and dexamethasone-responsive enhancers in close proximity to their cognate gene promoters.

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Mammalian switch/sucrose non-fermentable (mSWI/SNF) ATPase degraders have been shown to be effective in enhancer-driven cancers by functioning to impede oncogenic transcription factor chromatin accessibility. Here, we developed AU-24118, a first-in-class, orally bioavailable proteolysis targeting chimera (PROTAC) degrader of mSWI/SNF ATPases (SMARCA2 and SMARCA4) and PBRM1. AU-24118 demonstrated tumor regression in a model of castration-resistant prostate cancer (CRPC) which was further enhanced with combination enzalutamide treatment, a standard of care androgen receptor (AR) antagonist used in CRPC patients.

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