Diagnosing contact dermatitis using machine learning: A review.

BACKGROUND: Machine learning (ML) offers an opportunity in contact dermatitis (CD) research, where with full clinical picture, may support diagnosis and patch test accuracy. OBJECTIVE: This review aims to summarise the existing literature on how ML can be applied to CD in its entirety. METHODS: Embase, Medline, IEEE Xplore, and ACM Digital Library were searched from inception to February 7, 2024, for primary literature reporting on ML models in CD. RESULTS: 7834 articles were identified in the search, with 110 moving to full-text review, and six articles included. Two used ML to identify key biomarkers to help distinguish between allergic contact dermatitis (ACD) and irritant contact dermatitis (ICD), three used image data to distinguish between ACD and ICD, and one used clinical and demographical data to predict the risk of positive patch tests. All studies used supervision in their ML model training with a total of 49 704 patients across all data sets. There was sparse reporting of the accuracy of these models. CONCLUSIONS: Although the available research is still limited, there is evidence to suggest that ML has potential to support diagnostic outcomes in a clinical setting. Further research on the use of ML in clinical practice is recommended.

Published Support for Wellness, Diversity, Equity, and Inclusion Among Internal Medicine Residency Program Websites.

INTRODUCTION: The objective of this study was to review internal medicine residency program websites in the United States based on their published support for wellness, diversity, equity, and inclusion concepts. Inclusion of wellness, diversity, equity, and inclusion on program websites can serve as critical student benchmarks, and it may be paramount to optimize residency program websites accordingly. METHODS: This is a cross-sectional study of the websites of 597 internal medicine residency programs accredited by the Accreditation Council for Graduate Medical Education between March 25 and April 25, 2022. The websites were assessed based on 22 characteristics consisting of wellness verbiage, gender and underrepresented in medicine evaluation of faculty and residents, and diversity, equity, and inclusion-related semantics. Website photos were used to assess ethnic/sex representation. These attributes were devised by two sequentially set up focus groups consisting of 49 racially, ethnically, and gender-diverse medical students. RESULTS: A total of 579 internal medicine programs were reviewed. Only 239 (41%) had a dedicated page for resident wellness activities and efforts, while 134 (19%) had no mention of the concept throughout their web pages. Similarly, only 136 (23%) had a dedicated wellness officer, whether faculty or resident, who was focused on departmental interests. Gender diversity could be determined in 445 (77%) and 459 (79%) websites for faculty and residents, respectively. Underrepresented in medicine faculty and residents was noted in 293 (51%) and 393 (68%) of websites, respectively. A diversity, equity, and inclusion section was present in 172 (30%) of programs, with 93 (16%) having an assigned faculty or resident. Chairpersons or program directors stressed diversity, equity, and inclusion in up to 456 (79%) of the websites, with 181 (31%) having program mission statements or goals that include diversity, equity, and inclusion verbiage. CONCLUSION: A deficit of various essential wellness, diversity, equity, and inclusion attributes persists across internal medicine residency websites. Residency programs would benefit from optimizing their websites to attract more diverse applicants.

Dirty Jobs: Macrophages at the Heart of Cardiovascular Disease.

Cardiovascular disease (CVD) is one of the greatest public health concerns and is the leading cause of morbidity and mortality in the United States and worldwide. CVD is a broad yet complex term referring to numerous heart and vascular conditions, all with varying pathologies. Macrophages are one of the key factors in the development of these conditions. Macrophages play diverse roles in the maintenance of cardiovascular homeostasis, and an imbalance of these mechanisms contributes to the development of CVD. In the current review, we provide an in-depth analysis of the diversity of macrophages, their roles in maintaining tissue homeostasis within the heart and vasculature, and the mechanisms through which imbalances in homeostasis may lead to CVD. Through this review, we aim to highlight the potential importance of macrophages in the identification of preventative, diagnostic, and therapeutic strategies for patients with CVD.

TSP-1 (Thrombospondin-1) Deficiency Protects ApoE-/- Mice Against Leptin-Induced Atherosclerosis.

OBJECTIVE: Hyperleptinemia, hallmark of obesity, is a putative pathophysiologic trigger for atherosclerosis. We previously reported a stimulatory effect of leptin on TSP-1 (thrombospondin-1) expression, a proatherogenic matricellular protein implicated in atherogenesis. However, a causal role of TSP-1 in leptin-driven atherosclerosis remains unknown. Approach and Results: Seventeen-weeks-old ApoE-/- and TSP-1-/-/ApoE-/- double knockout mice, on normocholesterolemic diet, were treated with or without murine recombinant leptin (5 µg/g bwt, IP) once daily for 3 weeks. Using aortic root morphometry and en face lesion assay, we found that TSP-1 deletion abrogated leptin-stimulated lipid-filled lesion burden, plaque area, and collagen accumulation in aortic roots of ApoE-/- mice, shown via Oil red O, hematoxylin and eosin, and Masson trichrome staining, respectively. Immunofluorescence microscopy of aortic roots showed that TSP-1 deficiency blocked leptin-induced inflammatory and smooth muscle cell abundance as well as cellular proliferation in ApoE-/- mice. Moreover, these effects were concomitant to changes in VLDL (very low-density lipoprotein)-triglyceride and HDL (high-density lipoprotein)-cholesterol levels. Immunoblotting further revealed reduced vimentin and pCREB (phospho-cyclic AMP response element-binding protein) accompanied with augmented smooth muscle-myosin heavy chain expression in aortic vessels of leptin-treated double knockout versus leptin-treated ApoE-/-; also confirmed in aortic smooth muscle cells from the mice genotypes, incubated ± leptin in vitro. Finally, TSP-1 deletion impeded plaque burden in leptin-treated ApoE-/- on western diet, independent of plasma lipid alterations. CONCLUSIONS: The present study provides evidence for a protective effect of TSP-1 deletion on leptin-stimulated atherogenesis. Our findings suggest a regulatory role of TSP-1 on leptin-induced vascular smooth muscle cell phenotypic transition and inflammatory lesion invasion. Collectively, these results underscore TSP-1 as a potential target of leptin-induced vasculopathy.