A Comparative Analysis on the Potential Anticancer Properties of Tetrahydrocannabinol, Cannabidiol, and Tetrahydrocannabivarin Compounds Through In Silico Approach.

OBJECTIVE: The purpose of this study is to comparatively analyze the anticancer properties of Tetrahydrocannabinol (THC), Cannabidiol (CBD), and Tetrahydrocannabivarin (THCV) using In silico tools. METHODS: Using SwissADME and pkCSM, the physicochemical and pharmacokinetics properties of the cannabinoids were evaluated. Protox-II was utilized for the assessment of their cytotoxicity. The chemical-biological interactions of the cannabinoids were also predicted using the Way2Drug Predictive Server which comprises Acute Rat Toxicity, Adver-Pred, CLC-Pred, and Pass Target Prediction. RESULTS: Both physicochemical and drug-likeness analysis using SwissADME favored THCV due to high water solubility and lower MLOGP value. On the other hand, ADMET assessment demonstrated that THC and CBD have good skin permeability while both THC and THCV exhibited better BBB permeability and have low inhibitory activity on the CYP1A2 enzyme. Furthermore, toxicity predictions by Protox-II revealed that CBD has the lowest probability of hepatotoxicity, carcinogenicity, and immunotoxicity. Contrarily, it has the highest probability of being inactive in mutagenicity and cytotoxicity. Additionally, CLC results revealed that CBD has the highest probability against lung carcinoma. The rat toxicity prediction showed that among the cannabinoids, THCV had the lowest LD50 concentration in rat oral and IV. CONCLUSION: Overall, in silico predictions of the three cannabinoid compounds revealed that they are good candidates for oral drug formulation. Among the three cannabinoids, THCV is an excellent anticancer aspirant for future chemotherapy with the most favorable results in drug-likeness and ADMET analysis, pharmacological properties evaluation, and cytotoxicity assessment results. Further study on bioevaluation of compounds is needed to elucidate their potential pharmacological activities.

Single-cell RNA sequencing reveals the effects of chemotherapy on human pancreatic adenocarcinoma and its tumor microenvironment.

The tumor microenvironment (TME) in pancreatic ductal adenocarcinoma (PDAC) is a complex ecosystem that drives tumor progression; however, in-depth single cell characterization of the PDAC TME and its role in response to therapy is lacking. Here, we perform single-cell RNA sequencing on freshly collected human PDAC samples either before or after chemotherapy. Overall, we find a heterogeneous mixture of basal and classical cancer cell subtypes, along with distinct cancer-associated fibroblast and macrophage subpopulations. Strikingly, classical and basal-like cancer cells exhibit similar transcriptional responses to chemotherapy and do not demonstrate a shift towards a basal-like transcriptional program among treated samples. We observe decreased ligand-receptor interactions in treated samples, particularly between TIGIT on CD8 + T cells and its receptor on cancer cells, and identify TIGIT as the major inhibitory checkpoint molecule of CD8 + T cells. Our results suggest that chemotherapy profoundly impacts the PDAC TME and may promote resistance to immunotherapy.

Usability of the Participation and Environment Measure Plus (PEM+) for Client-Centered and Participation-Focused Care Planning.

IMPORTANCE: The Participation and Environment Measure Plus (PEM+) is a new electronic health application to help caregivers contribute to client-centered and participation-focused care planning for their young child. The PEM+ is designed to help caregivers build on their participation assessment by determining priority activities, setting specific goals, and identifying strategies for goal attainment. OBJECTIVE: To examine the usability of the PEM+. DESIGN: A single-arm usability trial. SETTING: Two early intervention and early childhood educational programs. PARTICIPANTS: Six caregivers of children ages 0-3 yr with developmental delay and receiving rehabilitation services. INTERVENTION: Caregivers who were eligible and enrolled were given access to the PEM+ for 1 wk and instructed to complete one iteration. OUTCOMES AND MEASURES: Usability was assessed according to caregivers' report of PEM+'s technical effectiveness and ease of use, ease of learning, and user satisfaction via the Usefulness, Satisfaction, and Ease of Use questionnaire. RESULTS: All caregivers completed the PEM+ online once and in its entirety (mean completion time = 13.6 min). Mean technical effectiveness ratings ranged from 5.7 to 6.3 out of 7.0, and mean ease of use, ease of learning, and user satisfaction ratings were 4.4, 5.4, and 4.2 out of 6.0, respectively. CONCLUSIONS AND RELEVANCE: Caregivers of young children can navigate the PEM+. Trends in survey feedback informed optimizations for the PEM+ before further feasibility testing. WHAT THIS ARTICLE ADDS: This study provides preliminary evidence for a promising tool that can help to customize the way practitioners partner with families to create a plan for occupational therapy services.

Caregiver Strategy Use to Promote Children's Home Participation After Pediatric Critical Illness.

OBJECTIVES: The primary objectives are to assess the most common type of caregiver strategy (remedial vs compensatory) reported for supporting their child's home participation after critical illness and identify themes in compensatory strategies described, with a secondary objective to describe themes in strategy use as reported by caregivers of children who did and did not receive pediatric intensive care unit (PICU) rehabilitation services. DESIGN: Qualitative substudy of the Wee-Cover prospective cohort study. SETTING: Two PICU sites. PARTICIPANTS: Wee-Cover enrolled caregivers (N=180) of children 1-17 years of age, who were admitted to a PICU for ≥48 hours. This study excluded participants missing relevant data (n=12). INTERVENTION: Not applicable. MAIN OUTCOME MEASURES: Qualitative data were gathered from open-ended questions on strategies within the Participation and Environment Measure at PICU discharge and 3 and 6 months post-PICU discharge. Strategies were classified as remedial or compensatory pending their content fit with 1 of 5 environmental chapters in the International Classification of Functioning, Disability, and Health-Children and Youth Version. Data on PICU-based rehabilitation services were obtained prospectively from electronic medical records and dichotomized (yes or no). RESULTS: Most caregiver strategies were compensatory, with more than half (60%) of the strategies pertaining to fostering supportive relationships. In contrast, strategies addressing the child's natural environment (12%), services (3%), and attitudes of others in the home (1%) were least commonly described. Similar themes were identified for caregivers whose children did and did not receive PICU rehabilitation services. CONCLUSIONS: Caregivers identify a range of strategies to facilitate their child's participation in home activities post-PICU discharge, but primarily report on strategies for addressing supports and relationships in the child's home environment. Results highlight areas warranting caregiver education to support the child's participation after critical illness.

Correction: Caregiver Input to Optimize the Design of a Pediatric Care Planning Guide for Rehabilitation: Descriptive Study.

[This corrects the article DOI: 10.2196/rehab.7566.].

Caregiver Input to Optimize the Design of a Pediatric Care Planning Guide for Rehabilitation: Descriptive Study.

BACKGROUND: Caregiver input has informed the design of a valid electronic patient-reported outcome (PRO) measure for use in pediatric rehabilitation. This proxy assessment may be further developed to expedite and enhance patient-centered care planning processes, but user input is first needed to finalize the core requirements that will guide its design. OBJECTIVE: The objective of this study was to examine the feasibility of a stepwise process for building on a baseline assessment of young children's participation in activities to develop a care plan relevant to pediatric rehabilitation. METHODS: A cross-sectional descriptive study design was employed using qualitative methods. Data were collected via Web-based technology and by telephone. Twenty-five caregivers of young children (9 with developmental delays, 16 without delays) and between 1 and 7 years were recruited from a subsample of parents who had previously enrolled in a Web-based validation of a PRO on children's participation and provided consent for future contact. Each caregiver completed a demographic questionnaire and Young Children's Participation and Environment Measure (YC-PEM) online, followed by a 20- to 60-min semistructured and audiotaped phone interview to review and build upon PRO results as summarized in an electronic report. Interview data were content coded to the interview guide and reviewed by multiple research staff to estimate feasibility according to stepwise completion rates, perceptions of difficulty in step completion, and perceptions of overall utility. RESULTS: Half of the participants in the final study sample (N=25) fully completed a stepwise process of building on their baseline PRO assessment to develop an initial care plan for their child. In most cases, similar stepwise completion rates and trends in the approaches taken for step completion were found regardless of the child's disability status. However, more parents of children with disabilities reported difficulties in rank ordering their priorities for change and identified child-focused strategies for goal attainment. Nearly 77% (19/25) of users were willing to use the process to develop and communicate intervention priorities and strategies with professionals, family, and friends. CONCLUSIONS: Results informed revisions to the care planning guide before usability and feasibility testing of an initial Web-based prototype that is now underway.

Antimicrobial resistance and virulence genes of Escherichia coli isolates from swine in Ontario.

A total of 318 Escherichia coli isolates obtained from diarrheic and healthy pigs in Ontario from 2001 to 2003 were examined for their susceptibility to 19 antimicrobial agents. They were tested by PCR for the presence of resistance genes for tetracycline, streptomycin, sulfonamides, and apramycin and of 12 common virulence genes of porcine E. coli. Antimicrobial resistance frequency among E. coli isolates from swine in Ontario was moderate in comparison with other countries and was higher in isolates from pigs with diarrhea than in isolates from healthy finisher pigs. Resistance profiles suggest that cephamycinases may be produced by > or = 8% of enterotoxigenic E. coli (ETEC). Resistance to quinolones was detected only in enterotoxigenic E. coli (< or = 3%). The presence of sul3 was demonstrated for the first time in Canada in porcine E. coli isolates. Associations were observed among tetA, sul1, aadA, and aac(3)IV and among tetB, sul2, and strA/strB, with a strong negative association between tetA and tetB. The paa and sepA genes were detected in 92% of porcine ETEC, and strong statistical associations due to colocation on a large plasmid were observed between tetA, estA, paa, and sepA. Due at least in part to gene linkages, the distribution of resistance genes was very different between ETEC isolates and other porcine E. coli isolates. This demonstrates that antimicrobial resistance epidemiology differs significantly between pathogenic and commensal E. coli isolates. These results may have important implications with regards to the spread and persistence of resistance and virulence genes in bacterial populations and to the prudent use of antimicrobial agents.