Publications by authors named "Lindsey Williams"

Caspase recruitment domain family member 14 (CARD14) and its variants are associated with both atopic dermatitis (AD) and psoriasis, but their mechanistic impact on skin barrier homeostasis is largely unknown. CARD14 is known to signal via NF-κB; however, CARD14-NF-κB signaling does not fully explain the heterogeneity of CARD14-driven disease. Here, we describe a direct interaction between CARD14 and MYC and show that CARD14 signals through MYC in keratinocytes to coordinate skin barrier homeostasis.

View Article and Find Full Text PDF

Microbial metabolites have emerged as key players in the interplay between diet, the gut microbiome, and host health. Two major classes, short-chain fatty acids (SCFAs) and tryptophan (Trp) metabolites, are recognized to regulate inflammatory, immune, and metabolic responses within the host. Given that many human diseases are associated with dysbiosis of the gut microbiome and consequent reductions in microbial metabolite production, the administration of these metabolites represents a direct, multi-targeted treatment.

View Article and Find Full Text PDF
Article Synopsis
  • * In a study of aged and young mice, researchers analyzed around 2.5 million mitochondrial genomes, revealing unique mutation patterns and high mutation frequency at key replication sites.
  • * The findings highlight a difference in mutation types between rodents and primates, with specific mutations showing signs of negative selection, suggesting that mitochondrial genomes adapt and change throughout an organism's life.
View Article and Find Full Text PDF
Article Synopsis
  • Duplex sequencing (DS) is a precise method that uses molecular barcodes to trace PCR copies back to their original DNA, allowing for effective error correction in sequencing results.
  • TwinStrand Biosciences has created a DS-based assay to examine genetic mutations in rats for toxicity testing, using a time-course study with ENU exposure.
  • Results showed significant increases in mutation frequency in rats' stomach and bone marrow as early as 24 hours post-exposure, establishing a specific mutational signature across different tissues, indicating the assay's effectiveness and reproducibility in assessing mutagenesis.
View Article and Find Full Text PDF

CD19-negative relapse is a leading cause of treatment failure after chimeric antigen receptor (CAR) T-cell therapy for acute lymphoblastic leukemia. We investigated a CAR T-cell product targeting CD19 and CD22 generated by lentiviral cotransduction with vectors encoding our previously described fast-off rate CD19 CAR (AUTO1) combined with a novel CD22 CAR capable of effective signaling at low antigen density. Twelve patients with advanced B-cell acute lymphoblastic leukemia were treated (CARPALL [Immunotherapy with CD19/22 CAR Redirected T Cells for High Risk/Relapsed Paediatric CD19+ and/or CD22+ Acute Lymphoblastic Leukaemia] study, NCT02443831), a third of whom had failed prior licensed CAR therapy.

View Article and Find Full Text PDF
Article Synopsis
  • Duplex sequencing (DuplexSeq) is an advanced method that links DNA strands to correct sequencing errors, allowing for accurate detection of mutations in tissues.
  • A study with male rats exposed to a chemical (ENU) showed significant increases in mutation frequency within 24 hours for certain tissues and confirmed a specific mutation pattern by day 7.
  • Results from different labs showed strong agreement, marking DuplexSeq as a reliable advancement over traditional gene mutation assays for testing genetic toxicity.
View Article and Find Full Text PDF

Mitochondrial genomes co-evolve with the nuclear genome over evolutionary timescales and are shaped by selection in the female germline. Here, we investigate how mismatching between nuclear and mitochondrial ancestry impacts the somatic evolution of the mt-genome in different tissues throughout aging. We used ultra-sensitive Duplex Sequencing to profile ~2.

View Article and Find Full Text PDF

One important function of the vascular blood-brain barrier (BBB) is to facilitate neuroimmune communication. The BBB fulfills this function, in part, through its ability to transport cytokines and chemokines. C-C motif chemokine receptor 2 (CCL2) (MCP-1) and C-C motif chemokine receptor 5 (CCL5) (RANTES) are proinflammatory chemokines that mediate neuroimmune responses to acute insults and aspects of brain injury and neurodegenerative diseases; however, a blood-to-brain transport system has not been evaluated for either chemokine in vivo.

View Article and Find Full Text PDF

Background: Human induced pluripotent stem cell (hiPSC)-derived brain endothelial-like cells (iBECs) are a robust, scalable, and translatable model of the human blood-brain barrier (BBB). Prior works have shown that high transendothelial electrical resistance (TEER) persists in iBECs for at least 2 weeks, emphasizing the utility of the model for longer term studies. However, most studies evaluate iBECs within the first few days of subculture, and little is known about their proliferative state, which could influence their functions.

View Article and Find Full Text PDF
Article Synopsis
  • Researchers used an organotypic human air-liquid-interface (ALI) airway model to study the toxicity of inhaled substances, focusing on DNA damage and mutagenesis caused by ethyl methanesulfonate (EMS).
  • They conducted experiments over 28 days, utilizing CometChip assays to measure DNA damage and Duplex Sequencing to quantify mutations, finding that EMS exposure led to increased DNA damage and mutation rates.
  • Despite showing cytotoxic effects and changes in cell structure and function, EMS did not significantly affect certain basal cell frequencies, indicating the ALI model's ability to assess multiple safety endpoints relevant to human airway health.
View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates whether the coronavirus (SARS-CoV-2) can enter the brain, finding that a component of the virus (the S1 subunit of the spike protein) can cross the blood-brain barrier in mice when injected intravenously.
  • - Intranasal administration of the S1 subunit also allows it to enter the brain, but at much lower levels compared to intravenous injection; various factors like APOE genotype and sex influenced uptake in specific brain and organ regions.
  • - The research reveals that the S1 subunit crosses the blood-brain barrier through a process called adsorptive transcytosis and involves a specific enzyme (angiotensin-converting enzyme 2) for uptake in the
View Article and Find Full Text PDF

The ability to accurately measure mutations is critical for basic research and identifying potential drug and chemical carcinogens. Current methods for in vivo quantification of mutagenesis are limited because they rely on transgenic rodent systems that are low-throughput, expensive, prolonged, and do not fully represent other species such as humans. Next-generation sequencing (NGS) is a conceptually attractive alternative for detecting mutations in the DNA of any organism; however, the limit of resolution for standard NGS is poor.

View Article and Find Full Text PDF

Existing research suggests that people with Autism Spectrum Disorder (ASD) are more likely than those without ASD to self-identify as asexual, or as being on the asexual spectrum. This study contributes to the literature by exploring aspects of sexuality and well-being in a large, community-based sample of young women (18-30 years old) with ASD (N = 247) and comparing the experiences of those with asexual spectrum identities and those with other sexual orientations (e.g.

View Article and Find Full Text PDF

Mutations of ABL1 are the dominant mechanism of relapse in Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph + ALL). We performed highly accurate Duplex Sequencing of exons 4-10 of ABL1 on bone marrow or peripheral blood samples from 63 adult patients with previously untreated Ph + ALL who received induction with intensive chemotherapy plus a BCR-ABL1 TKI. We identified ABL1 mutations prior to BCR-ABL1 TKI exposure in 78% of patients.

View Article and Find Full Text PDF

High-accuracy next-generation DNA sequencing promises a paradigm shift in early cancer detection by enabling the identification of mutant cancer molecules in minimally invasive body fluid samples. We demonstrate 80% sensitivity for ovarian cancer detection using ultra-accurate Duplex Sequencing to identify TP53 mutations in uterine lavage. However, in addition to tumor DNA, we also detect low-frequency TP53 mutations in nearly all lavages from women with and without cancer.

View Article and Find Full Text PDF

We sought to understand stakeholder perspectives on barriers to metabolic screening for people with severe mental illness. We additionally assessed the feasibility of expanding psychiatrists' scope of practice to include treatment of cardiometabolic abnormalities. We conducted four focus groups among patients with severe mental illness, community psychiatrists, primary care providers, and public health administrators.

View Article and Find Full Text PDF

Background: Stress echocardiography has been advocated for the detection of abnormal myocardial function and unmasking diminished myocardial reserve in pediatric patients. The aim of this study was to create a simplified index of myocardial reserve, derived from the myocardial inotropic response to peak semisupine exercise in healthy children, and illustrate its applicability in a sample of pediatric oncology patients.

Methods: In this prospective analysis, children (7-18 years of age) with normal cardiac structure and function performed semisupine stress echocardiography to volitional fatigue.

View Article and Find Full Text PDF

Mutator phenotypes create genetic diversity that fuels tumor evolution. DNA polymerase (Pol) ε mediates leading strand DNA replication. Proofreading defects in this enzyme drive a number of human malignancies.

View Article and Find Full Text PDF

Background: Patients with Marfan (MFS) and Loeys-Dietz (LDS) syndromes have been shown to have abnormal aortic biophysical properties. The purpose of this study was to compare the effects of 12-months of therapy with atenolol or losartan on vascular function in young patients with MFS and LDS.

Methods: Seventeen patients with MFS or LDS were recruited and randomized to treatment with atenolol, 25-50mg, or losartan, 25mg daily.

View Article and Find Full Text PDF

Emphasis on early identification of atypical development has increased as evidence supporting the efficacy of intervention has grown. These increases have also directly affected the availability of funding and providers of early intervention services. A majority of research has focused on interventions specific to an individual's primary diagnoses.

View Article and Find Full Text PDF