The Relevance and Potential Role of Orbital Fat in Inflammatory Orbital Diseases: Implications for Diagnosis and Treatment

The orbit is an important structure within the skull that houses the eye, optic nerve, and extraocular muscles. It also contains adipose/fat tissue, which provides a protective cushion for these components. Inflammatory orbital disease can affect any or all components of the orbit, often arising from various underlying pathologic conditions, including autoimmune, infectious, and vascular diseases. Typical signs and symptoms of orbital inflammation include swelling, redness, pain, discomfort, and potential loss of function. The role of orbital fat in the pathogenesis of inflammatory orbital diseases has not been fully explored. This review aims to provide a comprehensive description of orbital fat, its relevance and the potential role in inflammatory diseases of the orbit, and the use of radiologic imaging studies for evaluating this fat depot in cases of as inflammatory orbital diseases. Additionally, this review discusses the various procedures available for the treatment and management of these conditions. A range of interventions, including pharmacotherapy and surgical procedures, will be evaluated as promising therapeutic options. This review also explores the characteristics and potential applications of orbital fat-derived stem cells, with an emphasis on their regenerative abilities and anti-inflammatory effects. Understanding the role of orbital fat and its contribution to inflammatory orbital diseases is essential for optimizing diagnostic and treatment strategies.

Rheumatology education in India: a survey-based cross sectional study

This study aimed at understanding the perception and perspectives of rheumatology trainees about specialist training in India. Rheumatology trainees (Doctorate of Medicine, Diplomate of National Board) in Indian universities (2010 onwards) were contacted to complete a validated e-survey consisting of 41 questions to evaluate the current rheumatology training in India. Of 53 respondents (M:F 3.4:1, mean age 37 years ± 12.7), 81.1% trained at government hospitals, and 15.1% trained at private hospitals. During training period, 37.5% respondents were exposed to 6-7 h of didactics/week. They treated nearly 175 patients (175 ± 35.4) per week and reported a reasonable level of independence in management of patients with common rheumatic diseases (RDs) during their training (7.5 ± 0.7 SD). However, nearly one-third of the trainees were not exposed to basic immunology and laboratory techniques. Similarly, placement in the radiology department was not a part of the curriculum for nearly half of the trainees, 80% were not confident to manage paediatric RDs and soft tissue rheumatism. Almost 60% did not feel comfortable in addressing ancillary care including patient counselling as they had not received formal training. Among the participants, 59% were not satisfied by the current system of assessment, 86.8% suggested for multiple time point-based assessment systems and 45.3% preferred objective and subjective assessment in final examinations. Rheumatology training in India offers notable exposure to patients and independence in managing cases. However, there is an unmet need for improvement in training in the field of laboratory, radiology and ancillary care, and to overhaul assessment system by including objective evaluation.

Transcriptional Profiling of Synovial Macrophages Using Minimally Invasive Ultrasound-Guided Synovial Biopsies in Rheumatoid Arthritis

OBJECTIVE

Currently, there are no reliable biomarkers for predicting therapeutic response in patients with rheumatoid arthritis (RA). The synovium may unlock critical information for determining efficacy, since a reduction in the numbers of sublining synovial macrophages remains the most reproducible biomarker. Thus, a clinically actionable method for the collection of synovial tissue, which can be analyzed using high-throughput strategies, must become a reality. This study was undertaken to assess the feasibility of utilizing synovial biopsies as a precision medicine-based approach for patients with RA.

METHODS

Rheumatologists at 6 US academic sites were trained in minimally invasive ultrasound-guided synovial tissue biopsy. Biopsy specimens obtained from patients with RA and synovial tissue from patients with osteoarthritis (OA) were subjected to histologic analysis, fluorescence-activated cell sorting, and RNA sequencing (RNA-seq). An optimized protocol for digesting synovial tissue was developed to generate high-quality RNA-seq libraries from isolated macrophage populations. Associations were determined between macrophage transcriptional profiles and clinical parameters in RA patients.

RESULTS

Patients with RA reported minimal adverse effects in response to synovial biopsy. Comparable RNA quality was observed from synovial tissue and isolated macrophages between patients with RA and patients with OA. Whole tissue samples from patients with RA demonstrated a high degree of transcriptional heterogeneity. In contrast, the transcriptional profile of isolated RA synovial macrophages highlighted different subpopulations of patients and identified 6 novel transcriptional modules that were associated with disease activity and therapy.

CONCLUSION

Performance of synovial tissue biopsies by rheumatologists in the US is feasible and generates high-quality samples for research. Through the use of cutting-edge technologies to analyze synovial biopsy specimens in conjunction with corresponding clinical information, a precision medicine-based approach for patients with RA is attainable.