BRWD1 orchestrates small pre-B cell chromatin topology by converting static to dynamic cohesin.

Lymphocyte development consists of sequential and mutually exclusive cell states of proliferative selection and antigen receptor gene recombination. Transitions between each state require large, coordinated changes in epigenetic landscapes and transcriptional programs. How this occurs remains unclear.

Is Cemented Bipolar Hemiarthroplasty Good Choice For Unstable Intertrochanteric Fractures In Elderly: Multicentric Prospective Study At Karachi.

Background: To analyse the functional outcome of primary cemented bipolar hemi arthroplasty (PCBH) for unstable osteoporotic intertrochanteric femur fractures in elderly patients.

Methods: : It was a multicentre prospective study conducted at Institute of Orthopaedics & Surgery, Medicare Cardiac & General Hospital and Dr Ruth K M Pfau Civil Hospital Karachi, Pakistan from February 2015 to July 2020. Thirty-eight patients of 60-90 years of either gender diagnosed as close UIF, severe osteoporosis as per Singh index grade ≤3, time since injury <2 weeks, ASA status II & III and pre-injury independent walking were enrolled in this study.

Tcf-1 promotes genomic instability and T cell transformation in response to aberrant β-catenin activation.

Understanding the mechanisms promoting chromosomal translocations of the rearranging receptor loci in leukemia and lymphoma remains incomplete. Here we show that leukemias induced by aberrant activation of β-catenin in thymocytes, which bear recurrent translocations, depend on Tcf-1. The DNA double strand breaks (DSBs) in the site of the translocation are Rag-generated, whereas the DSBs are not.

Wnt-β-catenin activation epigenetically reprograms T cells in inflammatory bowel disease and dysplastic progression.

The diversity of regulatory T (T) cells in health and in disease remains unclear. Individuals with colorectal cancer harbor a subpopulation of RORγt T cells with elevated expression of β-catenin and pro-inflammatory properties. Here we show progressive expansion of RORγt T cells in individuals with inflammatory bowel disease during inflammation and early dysplasia.

Machine Learning to Quantify Humoral Selection in Human Lupus Tubulointerstitial Inflammation.

In human lupus nephritis, tubulointerstitial inflammation (TII) is associated with expansion of B cells expressing anti-vimentin antibodies (AVAs). The mechanism by which AVAs are selected is unclear. Herein, we demonstrate that AVA somatic hypermutation (SHM) and selection increase affinity for vimentin.

Antibodies in cerebral cavernous malformations react with cytoskeleton autoantigens in the lesional milieu.

Previous studies have reported robust inflammatory cell infiltration, synthesis of IgG, B-cell clonal expansion, deposition of immune complexes and complement within cerebral cavernous malformation (CCM) lesions. B-cell depletion has also been shown to reduce the maturation of CCM in murine models. We hypothesize that antigen(s) within the lesional milieu perpetuate the pathogenetic immune responses in CCMs.

The Role of Arthroscopic Partial Meniscectomy in the Management of Degenerative Meniscus Tears: A Review of the Recent Literature.

Background: The use of arthroscopic partial meniscectomy for middle aged to older adults with knee pain is one of the most common surgical procedures with approximately 150,000 knee arthroscopies being carried out in the United Kingdom each year, and about five times that number in the United States. Despite this, the procedure remains controversial. The aim of this paper is to provide a comprehensive review of the role of arthroscopic meniscectomy in patients with degenerative meniscus tears and suggest recommendations for clinical practice.

Treatment of infected nonunion of the juxta-articular region of the distal tibia.

Objective: The purpose of this study was to summarize our clinical results with distraction osteogenesis for the treatment of infected tibial nonunion around the ankle joint.

Methods: Between 1994 and 2009, 13 patients with a mean age of 50 years (range: 27-79 years) underwent tibial reconstruction for the treatment of infected nonunion of the distal tibia, with a mean bone loss of 4.8 cm (range: 1-7 cm).

Diabetes Complications at Presentation and One Year by Glycated Haemoglobin at Diagnosis in a Multiethnic and Diverse Socioeconomic Population: Results from the South London Diabetes Study.

Background. WHO's recommendation of HbA1c ≥ 48 mmol/mol (6.5%) as diagnostic for type 2 diabetes mellitus (T2DM) was adopted by three UK London boroughs in May 2012.

Subacromial impingement syndrome.

Subacromial impingement syndrome (SAIS) represents a spectrum of pathology ranging from subacromial bursitis to rotator cuff tendinopathy and full-thickness rotator cuff tears. The relationship between subacromial impingement and rotator cuff disease in the etiology of rotator cuff injury is a matter of debate. However, the etiology is multi-factorial, and it has been attributed to both extrinsic and intrinsic mechanisms.