Citations

ABSTRACT Knowledge of Treponema pallidum subspecies pallidum ( TPA ) outer membrane protein (OMP) sequence variability is essential for understanding spirochete proliferation within endemic populations as well as design of a globally effective syphilis vaccine. Our group has identified extracellular loops (ECLs) of TPA BamA (TP0326) and members of the FadL family (TP0548, TP0856, TP0858, TP0859, and TP0865) as potential components of a multivalent vaccine cocktail. As part of a consortium to explore TPA strain diversity, we mapped the variability of BamA and FadL orthologs in 186 TPA strains from Malawi, China and Colombia onto predicted 3D structures. The 186 genomes fell into eight subclades (five Nichols-, three SS14-lineage) with substantial geographic restriction. Single nucleotide variants accounted for the large majority of proteoforms, with variability notably higher within the Nichols-lineage strains. Most mutations were in regions of the proteins predicted to be extracellular and harboring B cell epitopes. We observed a striking difference in the degree of variability between the six OMPs, suggesting that these proteins are following divergent evolutionary paths. Concatenation of OMP sequences recapitulated the phylogenetic structure of the TPA strains, effectively segregating within clades and largely clustering by subclades. Lastly, we noted that BamA and FadL candidate ECL vaccinogens previously shown to elicit antibodies that kill treponemes during in vitro cultivation are well conserved. Taken as a whole, our study establishes a structural-phylogenetic approach for analyzing the forces shaping the host-pathogen interface in syphilis within endemic populations while informing selection of vaccine targets. IMPORTANCE Syphilis remains a major global health concern, reinforcing the need for a safe and effective vaccine. Understanding the variability of TPA OMPs is essential for tracking pathogen evolution and informing vaccine design. Here, we analyzed the variability of six TPA OMPs in 186 strains from Malawi, China, and Colombia, identifying protein-specific evolutionary patterns. Most mutations were localized in extracellular regions and, notably, appeared to correlate with the phylogenetic structure of TPA . Despite OMP heterogeneity, several candidate vaccinogens remained highly conserved, reinforcing their potential as globally effective vaccine targets. Our study establishes a structural-phylogenetic framework for dissecting the forces shaping the host-spirochete interface within endemic populations and provides a foundation for designing a globally effective syphilis vaccine.

Background: Traditional Medicare (TM) claims data are widely used by researchers and registries to report survivorship following total knee arthroplasty (TKA). The purpose of the present study was to investigate whether the mass exodus of patients from TM to Medicare Advantage (MA) has compromised the fidelity of TM data. Methods: We identified 11,717 Medicare-eligible patients (15,282 knees) who had undergone primary TKA from 2000 to 2020 at a single institution. Insurance type was analyzed, and 84% of TKAs were covered by TM. The rates of survivorship free from revision or reoperation were calculated for patients with TM coverage. The same survivorship end points were recalculated after censoring of patients who transitioned to MA after primary TKA, thereby modeling the impact of losing patients from the TM dataset. Differences in survivorship were compared. The mean duration of follow-up was 10 years. Results: From 2000 to 2020, there was a decrease in TM insurance (from 94% to 68%) and a corresponding increase in MA insurance (from 0% to 19%) among patients undergoing TKA. Following TKA, 25% of patients with TM coverage switched to MA. For patients with TM at the time of surgery, the 15-year rates of survivorship free from any reoperation or revision were 90% and 96%, respectively. When patients were censored upon transition from TM to MA, the 15-year rates of survivorship free from any reoperation (92% versus 90%; hazard ratio [HR] = 1.2; p = 0.001) or any revision (97% versus 96%; HR = 1.3; p = 0.002) were significantly higher. Conclusions: One in 4 patients left TM for MA after primary TKA, effectively making them lost to follow-up within TM datasets. The mass exodus of patients out of TM resulted in falsely elevated estimates of survivorship free from reoperation and from revision, with increasing divergence in survivorship over time, when MA data were excluded. As MA continues to grow, efforts to incorporate these data will become increasingly important. Level of Evidence: Therapeutic Level III . See Instructions for Authors for a complete description of levels of evidence.

Abstract The benefits of photon-counting detector (PCD) CT include improved spatial resolution, increased radiation dose efficiency, and the elimination of electronic noise. Unlike traditional energy-integrating-detector (EID) CT systems, PCDs have inherent spectral capabilities, which support “always-on” dual energy and multi-energy imaging acquisition. PCD-CT directly converts X-ray photons into electrical signals and captures their individual energy levels. Current commercially available PCD-CT scanners, all from one manufacturer, include 2 models that incorporate dual-source geometry. This innovation is particularly advantageous for paediatric imaging by enabling rapid scans that reduce motion artifact and therefore the need for sedation and can now be combined in the current model with multi-energy imaging or ultra-high-resolution acquisition. This review article explores how the technical benefits of PCD CT improve the diagnostic quality of images and opens the field of paediatric radiology up to future opportunities for research and new applications.

Abstract Introduction Female sexual dysfunctions (FSDs) are prevalent yet underrecognized concerns among menopausal women, particularly those aged 65 and older. Age- and menopause-related sexual health issues often go unaddressed due to societal stigma and misconceptions, leading many women to attribute their symptoms to a normal part of aging. This perception limits diagnosis and treatment of conditions like hypoactive sexual desire disorder and genitourinary syndrome of menopause. Objective This study aims to compare sexual function and distress between women aged 50-64 and those aged 65 and older, with a focus on addressing critical knowledge gaps in sexual function among older women. Methods This cross-sectional study included women aged 50 and above who visited Mayo Clinic Women’s Health Clinics in Rochester, MN; Scottsdale, AZ; and Jacksonville, FL between, May 1, 2015, and August 31, 2022. Participants completed the Female Sexual Function Index (FSFI) and Female Sexual Distress Scale (FSDS-R), along with assessments of chief sexual health complaints, mood (PHQ-9), and anxiety (GAD-7) included in the Data Registry on Experiences of Aging, Menopause, and Sexuality (DREAMS). Results Among 4900 women included in the analysis, the median number of sexual health complaints was 2.0 in midlife (50-64 yrs) and 1.0 in older (65+ yrs) age groups (p = 0.004). Chief complaints of loss of sexual desire (47.6% vs. 33.4%; p < 0.001) and reduced genital sensation (16.9% vs. 13.0%; p = 0.024) were more common in the midlife age group. No significant differences were found in rates of complaints of vaginal dryness (51.2% vs. 52.5%; p = 0.57), painful intercourse (32.6% vs 30.7%; p = 0.38), or of difficulties with arousal or orgasm (24.0% vs 20.8%; p = 0.09). Midlife age women were also more likely to report pelvic pain (6.7% vs. 4.5%; p = 0.050), while older women reported more genital pain (8.1% vs. 5.8%; p = 0.038). FSFI scores indicated age-related differences in desire (2.4 vs. 3.0; p < 0.001), lubrication (3.9 vs. 3.6; p < 0.001), and pain (4.8 vs. 4.0; p < 0.001), aligning with the chief complaints, while arousal (3.6, p = 0.890), orgasm (4.0, p = 0.926), and satisfaction (4.4, p = 0.346) scores were similar between groups. Total FSFI scores showed no significant difference between the age groups (total = 22.2 vs 21.2, p = 0.109). Median FSDS-R scores indicated higher distress in the midlife group (15.0 vs. 13.0; p = 0.015), while overall FSD prevalence (FSFI ≤26.55 and FSDS ≥11) was similar between groups (56.2% vs 51.8%; p = 0.056). Conclusions Midlife and older women were equally likely to experience FSD in women presenting to women’s health clinics, but older women reported less distress. These results are strikingly similar to previous research indicating that while older women have FSD, there is less distress associated with it. Raising awareness and promoting open dialogue can help older women recognize that their sexual health concerns are both valid and treatable, ultimately improving quality of life. Disclosure No.

Abstract Introduction Sexually transmitted viruses (STVs), including Human Immunodeficiency Virus (HIV), Human Papillomavirus (HPV), Herpes Simplex Virus (HSV), and Hepatitis B Virus (HBV), present major public health challenges due to their high prevelance, chronicity, and transmission rates. Extending beyond immediate health impacts, these viruses affect sexual health and function through mechanisms including chronic inflammation, psychological stress, social stigma, and adverse effects of treatment. While the link between STVs and sexual disorders is acknowledged, it is underexplored in the literature, particularly concerning female sexual health. Current research largely focuses on male sexual dysfunction, especially erectile disorder and its treatment. This review investigates the relationship between STVs and female sexual disorders, examining physiological, psychological, and social factors contributing to sexual health concerns. Enhancing our understanding of this relationship could support clinicians in identifying sexual health concerns in female patients with STVs and providing targeted interventions to optimize sexual health outcomes. Objective This systematic review aims to examine existing literature on the relationship between STVs and female sexual disorders, identifying specific dysfunctions (e.g., pain, desire, arousal, and satisfaction) associated with each virus, underlying mechanisms, and discussing clinical and research implications. Methods A comprehensive literature search was conducted in September 2024 across four databases: Ovid MEDLINE, Ovid EMBASE, Scopus, and Web of Science. A total of 523 references were identified, with 139 duplicates removed, leaving 384 studies for screening based on inclusion and exclusion criteria. Searches combined MeSH (Medical Subject Headings) terms and keywords to capture relevant studies. MeSH terms included “Sexual Dysfunction, Physiological,” “Sexual Dysfunction, Psychological,” “Papillomavirus Infections,” “Herpesvirus 2, Human,” “Hepatitis B,” and “HIV.” Additional keywords included “sexual dysfunction,” “HSV,” “hepatitis,” “HPV,” “woman,” “women,” and “female.” The search was limited to English-language studies. Results A total of 384 studies met the inclusion criteria, with findings revealing associations between specific STVs and various types of female sexual dysfunction. HSV was notably associated with dyspareunia during outbreaks due to genital ulcers, as well as with psychosexual issues linked to concerns about transmissibility and the stigma of visible lesions, negatively affecting intimate relationships. HIV was associated with multifactorial sexual dysfunction, encompassing psychological impacts such as fear of transmission and health-related anxiety, as well as physiological effects like decreased sexual desire from antiretroviral therapy and lipodystrophy. HPV’s relationship with sexual disorders was variable, with some studies connecting it to heightened depression and anxiety following diagnosis, which diminished sexual desire. For HBV, sexual dysfunction correlated with the severity of liver dysfunction, as chronic liver disease in women impairs hormone metabolism and increases sex hormone-binding globulin (SHBG) levels, leading to suppression of the hypothalamic–pituitary-gonadal axis. Conclusions This review highlights a notable relationship between STVs and female sexual dysfunction, emphasizing the need for comprehensive care that addresses both management of the infection and sexual health concerns. Routine screening for sexual health concerns in women with STVs is recommended, along with interdisciplinary approaches to address these complex impacts. Improved recognition and management of sexual disorders in this context can enhance both sexual health outcomes and overall quality of life in affected individuals. Disclosure No.

Importance Digital health technologies (DHTs) aiming to monitor, treat, and manage diseases can be prescribed for patients with multimorbidity; yet most DHTs are designed for individual conditions or problems, while approximately half of patients with chronic conditions have multiple chronic conditions. Objectives To identify DHTs approved by the US Food and Drug Administration (FDA) or listed in the Organisation for the Review of Care and Health Apps (ORCHA) library and prescribable for a hypothetical patient with 5 conditions and to model the number of DHTs this patient should be prescribed to receive benefits health professionals considered important. Evidence Review The FDA databases (Premarket Notification 510(k), Premarket Approval, and De Novo) and the ORCHA App Library from National Health Service Somerset were systematically searched for DHTs registered or updated between January 1, 2019, and December 31, 2022, that could be prescribed to a hypothetical woman with 5 chronic conditions (type 2 diabetes, hypertension, chronic obstructive pulmonary disease, osteoporosis, and osteoarthritis). After abstracting each DHT’s elementary functions (ie, simple and delineated features to monitor, treat, and/or manage conditions), an assessment was undertaken to determine the fewest DHTs this hypothetical patient should be prescribed to receive benefit from digital functions health professionals considered important. Findings A total of 148 DHTs were identified (68 [46%] from FDA databases), of which 96 (65%) involved devices and 52 (35%) were standalone health apps. Only 5 DHTs (3.4%) were intended for 2 or more conditions. DHTs offered 140 elementary functions, ranging from recording, tracking, or visualizing health parameters to providing information to digital therapeutics with just-in-time interventions. The hypothetical patient would need to be prescribed up to 13 apps and 7 devices (a blood pressure monitor, a smartwatch, a pulse oximeter, a connected weight scale, a sensor-attached inhaler to monitor adherence, a lung function monitor, and a blood glucose sensor) to receive benefits from 28 functions at least 3 of 5 health professionals considered important. Conclusions and Relevance This systematic review found that almost all prescribable DHTs were developed for a single condition or problem. Thus, patients with multiple chronic conditions would have to routinize many DHTs concurrently in daily life to benefit from digital functions health professionals considered important.

Abstract Glioblastoma (GBM) is a deadly brain cancer with near-universal recurrence despite maximal treatment for which new innovations are sorely needed. Immunotherapy has yet to make significant gains in GBM treatment despite revolutionizing other cancer therapies, due in part to GBM-mediated immune suppression. This immune derangement proceeds through several mechanisms, but increasing evidence points to critical roles for tumor-derived extracellular vesicles (EVs) and immunosuppressive myeloid cells as key factors in this process. In the present study, we demonstrate broad expression of TIGIT across myeloid cell populations in the GBM microenvironment, a finding recapitulated by conditioning healthy monocytes with GBM-derived EVs. Further, knockdown of TIGIT expression reduced the immunosuppressive polarization of monocytes, resulting in improvement in T cell function. This finding proceeded in an NLRP3-dependent manner, with substantial co-localization of TIGIT and NLRP3 expression prior to knockdown. These findings point to a novel role for TIGIT expression in diverse myeloid cells in the GBM microenvironment as a marker of immunosuppressive activity and further indicate a hierarchy of immunomodulatory protein activity in these myeloid cells, with TIGIT knockdown unmasking the pro-inflammatory activity of NLRP3. This study bolsters understanding of the immunosuppressive complexities of myeloid cells in the GBM microenvironment, while lending further support to prevention or attenuation of immunosuppressive myeloid cell activity as a means of restoring immune function in GBM. Graphical abstract (Created in BioRender. Asad, M. (2025) https://BioRender.com/euiljoq Key Points Tumor-mediated immune suppression is a key barrier to the development of effective immunotherapies for GBM. TIGIT is broadly expressed in myeloid cells within the GBM microenvironment and can be induced by GBM-derived extracellular vesicles. Knockdown of TIGIT reduces immunosuppressive polarization of monocytes and enhances T cell activity via NLRP3 signaling, implicating TIGIT expression as a targetable modifier of immunosuppressive activity in GBM-associated myeloid cells. Importance of the Study Glioblastoma (GBM) remains a formidable clinical challenge, with poor prognosis and limited response to current immunotherapies. This study uncovers a novel immunosuppressive axis involving TIGIT expression in myeloid cells, which are key players in the GBM tumor microenvironment. By demonstrating GBM-derived extracellular vesicles induce TIGIT in healthy monocytes and TIGIT knockdown diminishes immunosuppressive polarization in an NLRP3-dependent manner, this study highlights TIGIT as both a marker and modulator of immune dysfunction in GBM. These findings introduce a functional hierarchy of immunoregulatory proteins in tumor-associated myeloid cells, positioning TIGIT as a potential checkpoint target. Restoring immune activity by disrupting this axis could enhance the efficacy of immunotherapy in GBM. Thus, this research not only advances our understanding of tumor-induced immune suppression but also opens a promising therapeutic avenue to reinvigorate anti-tumor immunity in a cancer type historically resistant to immunotherapeutic approaches.

ABSTRACT Contezolid has activity against methicillin-resistant Staphylococcus aureus (MRSA), a common cause of orthopedic infection. In a rat model of foreign body osteomyelitis, 1.3 log 10 cfu/g bone and 0.5 log 10 cfu/k-wire reduction in MRSA was found in tibiae ( P = 0.0186) and K-wires, respectively, of contezolid-treated compared to untreated rats. No MRSA was recovered from animals receiving rifampin alone or in combination with contezolid or vancomycin. There was no emergence of resistance to contezolid, vancomycin, or rifampin.