Occupational exposures and age-related cataract: A review.

Occupational exposures comprise of a broad range of factors in constant and direct contact with the ocular surface. Cataract, a leading cause of visual impairment globally, has been associated with various occupational exposures. This review critically examines existing literature on the relationship between occupational exposures and cataract development.

The Future State of Race/Ethnicity in Urology: Urology Workforce Projection From 2021-2061.

Objective: To project the proportion of the urology workforce that is from under-represented in medicine (URiM) groups between 2021-2061.

Methods: Demographic data were obtained from AUA Census and ACGME Data Resource Books. The number of graduating urology residents and proportion of URiM graduating residents were characterized with linear models.

Spatial mapping of mitochondrial networks and bioenergetics in lung cancer.

Mitochondria are critical to the governance of metabolism and bioenergetics in cancer cells. The mitochondria form highly organized networks, in which their outer and inner membrane structures define their bioenergetic capacity. However, in vivo studies delineating the relationship between the structural organization of mitochondrial networks and their bioenergetic activity have been limited.

Strength of CAR signaling determines T cell versus ILC differentiation from pluripotent stem cells.

Generation of chimeric antigen receptor (CAR) T cells from pluripotent stem cells (PSCs) will enable advances in cancer immunotherapy. Understanding how CARs affect T cell differentiation from PSCs is important for this effort. The recently described artificial thymic organoid (ATO) system supports in vitro differentiation of PSCs to T cells.

Someone Like Me: An Examination of the Importance of Race-Concordant Mentorship in Urology.

Objective: To describe differences in urology mentorship exposure for medical students across race/ethnicity and to explore how much potential mentees valued the importance of race-concordant mentorship.

Methods: All medical students at UCLA received a cross-sectional survey. Dependent variables were perceived quality of mentorship in urology and association between race-concordant mentorship and perceived importance of race-concordant mentorship.

Racial and Ethnic Differences in Medical Student Timing and Perceived Quality of Exposure to Urology.

Objective: To contextualize the low representation of Under-Represented in Medicine (URiM) in urology, we examine differences in timing and perceived quality of urology clinical and research exposures for medical students across race/ethnicity.

Methods: A cross-sectional survey was distributed to all medical students at University of California, Los Angeles. Dependent variables were timing of urology exposure and perceived quality of urology exposure.

Acute interstitial nephritis observed with three different triggering agents.

A 70-year-old female patient developed acute interstitial nephritis (AIN) after treatment with non-steroidal anti-inflammatory drugs (NSAIDs), proton pump inhibitors (PPI), and Bromhexine. Renal biopsy confirmed the diagnosis, and the patient was treated with oral prednisone. Careful attention to timing of acute kidney injury (AKI) is crucial to diagnosing AIN.

Circadian and ultradian rhythms in normal mice and in a mouse model of Huntington's disease.

Circadian rhythms in core body temperature (CBT) have been widely studied, but fewer studies have explored higher-frequency (ultradian) rhythms in detail. We analyzed CBT recordings from young and middle-aged wild-type mice as well as from the Q175 model of Huntington's disease (HD), at sufficient temporal resolution to address the question of ultradian rhythms. We used model selection methods to show that the overall circadian pattern was better fit by a square wave than a sine wave.

Trends in the Racial and Ethnic Diversity in the US Urology Workforce.

Objective: To examine the historical trends and factors underlying the current state of racial/ethnic representation within the urology workforce at each stage of the educational pipeline.

Methods: Using data from the US Census Bureau and the Association of American Medical Colleges, trends in racial/ethnic distribution for 2007-2008 to 2019-2020 were tracked in the educational pipeline for academic urologists. This pipeline was defined as progressively diminishing cohorts, starting with the US population, leading to medical school application, acceptance, and graduation, through to urology residency application, matching, and graduation, and ending with urology faculty appointment.

Diversifying Graduate Medical Education & the Urology Workforce: Re-imagining our Structures, Policies, Practices, Norms, & Values.

This article offers a framework for critically examining the structures, policies, norms, practices, and values that shape the Urology Match as a foundation for interventions to improve diversity, equity, inclusion, and justice in the workforce. Points of leverage for transformational change in the urology workforce diversification include modifying the structure of the urology application process, optimizing reviewer factors, addressing Under-Represented in Medicine applicant experience, providing resources to applicants, and evaluating selection criteria. To achieve an inclusive diverse urology workforce, we must change policy and practice, expand what we include in the norm, which will translate into increased value ascribed to a more varied cohort of applicants, leading to the establishment of structures that accommodate true diversity.

Genetic ablation of adenosine receptor A3 results in articular cartilage degeneration.

Unlabelled: Osteoarthritis (OA), the most common form of arthritis, is characterized by inflammation of joints and cartilage degradation leading to disability, discomfort, severe pain, inflammation, and stiffness of the joint. It has been shown that adenosine, a purine nucleoside composed of adenine attached to ribofuranose, is enzymatically produced by the human synovium. However, the functional significance of adenosine signaling in homeostasis and pathology of synovial joints remains unclear.

Drug-induced modulation of gp130 signalling prevents articular cartilage degeneration and promotes repair.

Objective: Human adult articular cartilage (AC) has little capacity for repair, and joint surface injuries often result in osteoarthritis (OA), characterised by loss of matrix, hypertrophy and chondrocyte apoptosis. Inflammation mediated by interleukin (IL)-6 family cytokines has been identified as a critical driver of proarthritic changes in mouse and human joints, resulting in a feed-forward process driving expression of matrix degrading enzymes and IL-6 itself. Here we show that signalling through glycoprotein 130 (gp130), the common receptor for IL-6 family cytokines, can have both context-specific and cytokine-specific effects on articular chondrocytes and that a small molecule gp130 modulator can bias signalling towards anti-inflammatory and antidegenerative outputs.

Transcriptionally and Functionally Distinct Mesenchymal Subpopulations Are Generated from Human Pluripotent Stem Cells.

Various mesenchymal cell types have been identified as critical components of the hematopoietic stem/progenitor cell (HSPC) niche. Although several groups have described the generation of mesenchyme from human pluripotent stem cells (hPSCs), the capacity of such cells to support hematopoiesis has not been reported. Here, we demonstrate that distinct mesenchymal subpopulations co-emerge from mesoderm during hPSC differentiation.

Generation of mature T cells from human hematopoietic stem and progenitor cells in artificial thymic organoids.

Studies of human T cell development require robust model systems that recapitulate the full span of thymopoiesis, from hematopoietic stem and progenitor cells (HSPCs) through to mature T cells. Existing in vitro models induce T cell commitment from human HSPCs; however, differentiation into mature CD3TCR-αβ single-positive CD8 or CD4 cells is limited. We describe here a serum-free, artificial thymic organoid (ATO) system that supports efficient and reproducible in vitro differentiation and positive selection of conventional human T cells from all sources of HSPCs.

Genetic Tagging During Human Mesoderm Differentiation Reveals Tripotent Lateral Plate Mesodermal Progenitors.

Although clonal studies of lineage potential have been extensively applied to organ specific stem and progenitor cells, much less is known about the clonal origins of lineages formed from the germ layers in early embryogenesis. We applied lentiviral tagging followed by vector integration site analysis (VISA) with high-throughput sequencing to investigate the ontogeny of the hematopoietic, endothelial and mesenchymal lineages as they emerge from human embryonic mesoderm. In contrast to studies that have used VISA to track differentiation of self-renewing stem cell clones that amplify significantly over time, we focused on a population of progenitor clones with limited self-renewal capability.

Lysophosphatidic acid mediates fibrosis in injured joints by regulating collagen type I biosynthesis.

Objective: Articular cartilage is a highly specialized tissue which forms the surfaces in synovial joints. Full-thickness cartilage defects caused by trauma or microfracture surgery heal via the formation of fibrotic tissue characterized by a high content of collagen I (COL I) and subsequent poor mechanical properties. The goal of this study is to investigate the molecular mechanisms underlying fibrosis after joint injury.