Publications by authors named "Lawrence S"

The crystal structures of (±)-mandelamide, -mandelamide, and enantioenriched mandelamide (94 : 6 ) were determined. Diastereomeric cocrystal pairs of -mandelamide with both enantiomers of mandelic acid and proline were synthesized. The diastereomeric cocrystal pairs of -mandelamide with /-mandelic acid form 1:1 cocrystals in each case, while the diastereomeric cocrystal pairs of -mandelamide with proline have different stoichiometries.

View Article and Find Full Text PDF
Article Synopsis
  • Large-scale studies are essential to investigate the gut microbiota's complex relationships with health and disease, and tissue preservation methods need evaluation for feasibility in such research.
  • Biopsies from 20 adults with inflammatory bowel disease were preserved using three methods: flash freezing, nucleic acid preservative reagents, and formalin fixation with paraffin embedding (FFPE), with microbiota analyzed using sequencing.
  • Results showed that while preservative reagents can serve as viable alternatives to flash freezing, FFPE samples exhibited distinct community structures, highlighting the potential utility of historical samples despite differences in microbial profiles.
View Article and Find Full Text PDF

Background & Aims: The Crohn's Disease (CD) Exclusion Diet (CDED)+Partial Enteral Nutrition (PEN) is effective for inducing remission in mild-moderate CD. We assessed whether a 2-week course of Exclusive Enteral Nutrition (EEN), followed by CDED+PEN is superior to 8 weeks of EEN in sustaining clinical remission at week 14 in mild-to-severe CD and if CDED+PEN can maintain remission to week 24.

Methods: This international, multicenter, randomized-controlled trial compared 2-weeks of EEN (Modulen®IBD) followed by 3 phases of the CDED+PEN (henceforth CDED) to 8 weeks of EEN, followed by PEN with free diet up to week 24 (henceforth EEN).

View Article and Find Full Text PDF

Background: Individuals identifying as Black, American Indian or Alaska Native, or Hispanic or Latino lack access to culturally appropriate accurate information and are the target of disinformation campaigns, which create doubt in science and health care providers and might play a role in sustaining health disparities related to the COVID-19 pandemic.

Objective: This study aims to create and disseminate culturally and medically appropriate social media messages for Black, Latino, and American Indian or Alaska Native communities in Wisconsin and evaluate their reach and effectiveness in addressing the information needs of these communities.

Methods: Our team identified relevant COVID-19 topics based on feedback from their respective community, developed lay format materials, and translated materials into culturally appropriate social media messages that community advocates delivered across their respective communities.

View Article and Find Full Text PDF

Postmortem single-cell studies have transformed understanding of lower respiratory tract diseases (LRTDs), including coronavirus disease 2019 (COVID-19), but there are minimal data from African settings where HIV, malaria and other environmental exposures may affect disease pathobiology and treatment targets. In this study, we used histology and high-dimensional imaging to characterize fatal lung disease in Malawian adults with (n = 9) and without (n = 7) COVID-19, and we generated single-cell transcriptomics data from lung, blood and nasal cells. Data integration with other cohorts showed a conserved COVID-19 histopathological signature, driven by contrasting immune and inflammatory mechanisms: in US, European and Asian cohorts, by type I/III interferon (IFN) responses, particularly in blood-derived monocytes, and in the Malawian cohort, by response to IFN-γ in lung-resident macrophages.

View Article and Find Full Text PDF

Objectives: Examine very short sleep among adolescents across multiple intersecting social positions and experiences of sexual orientation-based bullying and cyberbullying in two statewide samples.

Methods: A harmonization of two large statewide school-based datasets from grades 9-12 (2019 Minnesota Student Survey, and 2018-2019 California Healthy Kids Survey) was utilized for the analysis (N = 379,710). Exhaustive chi-square automatic interaction detection (an approach for quantitative intersectionality research) explored variability in very short sleep (≤5 hours/night) among adolescents from multiple intersecting social positions (race/ethnicity, gender identity, sexual orientation, and sex assigned at birth), grade, state, and two types of bullying experiences (sexual orientation-based bullying and cyberbullying).

View Article and Find Full Text PDF
Article Synopsis
  • Cordycepin, a compound being studied for cancer therapy, has various proposed mechanisms of action, but recent research suggests its active form is cordycepin triphosphate which inhibits gene expression triggered by growth factors.
  • The compound was found to block critical cell signaling pathways (PI3K/AKT/mTOR and MEK/ERK) in multiple cell lines, without needing to activate AMPK.
  • The action of cordycepin on the mTOR pathway occurs rapidly, within just 30 minutes, indicating a universal effect on growth factor signaling through a currently unidentified target molecule.
View Article and Find Full Text PDF
Article Synopsis
  • NICU admissions for hypothermia in infants born at 34 weeks gestation or later are a global issue, prompting a study to enhance normal admission temperatures for these infants.
  • Researchers implemented a root cause analysis and tested changes through plan-do-study-act cycles to create a standardized procedure for all births, tracking various outcomes with statistical methods.
  • The initiative led to an increase in normothermic NICU admissions from 62% to 80%, improved delivery room temperatures, and resulted in fewer cases of hypoglycemia and metabolic acidosis.
View Article and Find Full Text PDF

Objective: This study aimed to examine asthma disparities at the intersection of four sociodemographic characteristics, inhaled substance use, and bias-based bullying as metrics of stigma. We hypothesized that high prevalence groups for asthma would be those with marginalized social positions and those reporting bullying experiences, independent of inhaled substance use.

Method: The analytic sample ( = 90,367) included eighth, ninth, and 11th grade students who participated in the 2022 Minnesota Student Survey.

View Article and Find Full Text PDF

Background: Forecasting models predicting trends in hospitalization rates have the potential to inform hospital management during seasonal epidemics of respiratory diseases and the associated surges caused by acute hospital admissions. Hospital bed requirements for elective surgery could be better planned if it were possible to foresee upcoming peaks in severe respiratory illness admissions. Forecasting models can also guide the use of intervention strategies to decrease the spread of respiratory pathogens and thus prevent local health system overload.

View Article and Find Full Text PDF

Cancer continues to impose a substantial global health burden, particularly among the elderly, where the ongoing global demographic shift towards an ageing population underscores the growing need for early cancer detection. This is essential for enabling personalised cancer care and optimised treatment throughout the disease course to effectively mitigate the increasing societal impact of cancer. Liquid biopsy has emerged as a promising strategy for cancer diagnosis and treatment monitoring, offering a minimally invasive method for the isolation and molecular profiling of circulating tumour-derived components.

View Article and Find Full Text PDF

Background: Environmental Enteric Dysfunction (EED) is an acquired disorder of asymptomatic altered gut function, the etiology of which is unknown. EED is postulated to be a major contributor to growth faltering in early childhood in regions where early-life enteropathogenic carriage is prevalent. Few studies have examined the critical organ (the upper small bowel) with enteropathogens in the evolution of small bowel disease.

View Article and Find Full Text PDF
Article Synopsis
  • - Environmental enteric dysfunction (EED) is a condition that leads to inflammation in the small intestine, impacting childhood growth and neurodevelopment, but has been overlooked until recently.
  • - The EEDBI Consortium was formed in 2016 to study EED through biopsy data from children in Bangladesh, Pakistan, and Zambia, while also comparing them to children in the U.S. undergoing endoscopy for other reasons.
  • - The initiative aims to coordinate research efforts, allowing researchers to analyze EED-related tissue and associated factors like histology and biomarkers across multiple studies, all with the goal of better understanding this debilitating condition.
View Article and Find Full Text PDF

Conventional human stress responses are mediated by the sympathetic adrenal medullar (SAM) axis and the hypothalamic pituitary adrenal (HPA) axis. The SAM axis mediates the immediate response to stress through norepinephrine and epinephrine while the HPA axis mediates the slow response through corticosteroids, primarily cortisol, to effect systemic changes. Post Traumatic Stress Disorder (PTSD), a psychiatric disorder that develops in a small subset of people exposed to a traumatic event, may dysregulate these systems and result in increased risk of various clinical conditions.

View Article and Find Full Text PDF

Objectives: To describe the techniques for preparation and placement of peripheral intravenous catheters (PIVCs), to describe the complications associated with PIVCs, and to identify factors associated with PIVC complications in small animal practice in the United Kingdom.

Materials And Methods: A prospective multicentre observational study was undertaken between January 2022 and January 2023. Data collected included patient information, information regarding the placement and maintenance of PIVCs, and PIVC complications, from privately owned cats and dogs presenting to veterinary institutes in the United Kingdom.

View Article and Find Full Text PDF

Objective: Understanding judges' views is crucial to the successful adoption of a trauma-informed (TI) approach in the U.S. court system, yet little is known on this topic.

View Article and Find Full Text PDF

Purpose: Few reports include more than 1-2 social identities when examining organized sport and physical activity (PA) participation among adolescents. We used a quantitative intersectional approach to examine disparities in adolescent sport and PA lesson participation.

Methods: Ninth and 11th grade 2022 Minnesota Student Survey participants (N = 62,940) self-reported social identities and team sport and PA lessons.

View Article and Find Full Text PDF

Prcis: Patients' acceptance of glaucoma therapy was high overall in this study, but lower for surgery than for laser or medical therapy. Fear and cost were the leading reasons why patients declined recommended therapy and they were treatment-specific. Cost was the primary reason for declining medical and laser therapy, while fear was the most common reason for declining surgical therapy.

View Article and Find Full Text PDF

Background: Transcatheter aortic valve replacement (TAVR) is an important treatment option for patients with severe symptomatic aortic stenosis. It is important to identify predictors of excellent outcomes (good clinical outcomes, more time spent at home) after TAVR that are potentially amenable to improvement.

Objectives: The purpose of the study was to use machine learning to identify potentially modifiable predictors of clinically relevant patient-centered outcomes after TAVR.

View Article and Find Full Text PDF

Background: Physical literacy is a concept used to describe the combined physical, affective and cognitive capacities facilitating an active lifestyle. Physical activity participation is essential for children living with chronic medical conditions, but knowledge of physical literacy among this group is scarce.

Methods: An explanatory, sequential mixed methods design was used to comprehensively describe the physical literacies of children with chronic medical conditions (CMCs).

View Article and Find Full Text PDF

Human cytomegalovirus is an ancient virus that has co-evolved with humans. It establishes a life-long infection in suspectable individuals for which there is no vaccination or cure. The virus can be transmitted to a developing fetus in seropositive pregnant women, and it is the leading cause of congenital infectious disease.

View Article and Find Full Text PDF

The BCG vaccine is given to millions of children globally but efficacy wanes over time and differences in the immune systems between infants and adults can influence vaccine efficacy. To this end, 34 rhesus macaques were vaccinated with BCG within seven days of birth and blood samples were collected over 88 weeks for quantification of blood cell populations. Overall, the composition of cell populations did not change significantly between BCG vaccinated and unvaccinated groups, and that BCG vaccination did not perturb normal development.

View Article and Find Full Text PDF
Article Synopsis
  • Clear cell renal cell carcinoma (ccRCC) is the most prevalent type of kidney cancer, and a study analyzed the genomes of 778 ccRCC patients to uncover its mutational characteristics.
  • * The research identified key driver genes and emphasized the significance of epigenetic regulation, which may open up new treatment possibilities.
  • * Findings included that patients with more structural copy number alterations had worse outcomes, while those with VHL mutations fared better; this work supports the idea that immune response plays a role in prognosis and could influence immunotherapy approaches.*
View Article and Find Full Text PDF