A Multicenter Physician Survey Evaluating the Use of Ki-67 in Breast Cancer Management in Canada.

Background: Ki-67's response to pre-operative endocrine therapy (ET) in early breast cancer is an evidence-based tool to guide adjuvant treatment decisions. Physicians across Canada were surveyed to explore current practice patterns and perceived barriers to the use of Ki-67 in practice.

Methods: Physicians were invited to participate in an anonymous survey and were eligible if they prescribed systemic therapy for breast cancer in Canada.

Understanding the relationship between breast cancer, immune checkpoint inhibitors, and gut microbiota: a narrative review.

Background And Objective: The composition of gut microbiota plays an important role in predicting and influencing outcomes of cancer treated with immunotherapy. Our objective is to summarize the role of gut microbiota and immunotherapy in breast cancer.

Methods: A systematic search from inception until July 2024 of key search terms including immunity, breast neoplasm, gastrointestinal microbiome/microbiota, fecal microbiota transplantation, pro- and prebiotics, antibiotics and immunotherapy using EMBASE, MEDLINE and CENTRAL was conducted.

An Orai1 gain-of-function tubular aggregate myopathy mouse model phenocopies key features of the human disease.

Tubular aggregate myopathy (TAM) is a heritable myopathy primarily characterized by progressive muscle weakness, elevated levels of creatine kinase (CK), hypocalcemia, exercise intolerance, and the presence of tubular aggregates (TAs). Here, we generated a knock-in mouse model based on a human gain-of-function mutation which results in a severe, early-onset form of TAM, by inducing a glycine-to-serine point mutation in the ORAI1 pore (Orai1 or GS mice). By 8 months of age, GS mice exhibited significant muscle weakness, exercise intolerance, elevated CK levels, hypocalcemia, and robust TA presence.

A role for a Trypanosoma brucei cytosine RNA methyltransferase homolog in ribosomal RNA processing.

In Trypanosoma brucei, gene expression is primarily regulated posttranscriptionally making RNA metabolism critical. T. brucei has an epitranscriptome containing modified RNA bases.

Real-World Evaluation of Primary Versus Secondary Prevention of Skeletal-Related Events in Metastatic Castration-Resistant Prostate Cancer.

Introduction: Anti-osteoclast treatment with denosumab or zoledronate is known to effectively reduce the need for radiotherapy to bone and other skeletal-related events (SREs) in patients with metastatic castration-resistant prostate cancer (mCRPC). In this study, we analyze primary versus secondary initiation of bone-targeting agents (BTAs) relative to first palliative bone radiotherapy in patients dying of mCRPC.

Methods: Provincial administrative databases from Ontario, Canada identified patients with prostate cancer (2007-2018, n = 98 646) who received continuous androgen deprivation therapy (n = 29 453), died of prostate cancer (2013-2018, n = 3864), and received life-prolonging therapy for mCRPC (n = 1850).

Variation in Access to Palliative Radiotherapy in Prostate Cancer: A Population-Based Study in Canada.

Background: As a result of improvements in cancer therapies, patients with metastatic malignancies are living longer, and the role of palliative radiotherapy has become increasingly recognized. However, access to adequate palliative radiotherapy may continue to be a challenge, as is evident from the high proportion of patients dying of prostate cancer who never receive palliative radiotherapy. The main objective of this investigation is to identify and describe the factors associated with the receipt of palliative radiation treatment in a decedent cohort of prostate cancer patients in Ontario.

Using reflective practice to support PhD students in the biosciences.

Postgraduate study can be mentally, physically and emotionally challenging. The levels of anxiety and depression in postgraduate students are much higher than those in the general population, and isolation can also be a problem, especially for students who are marginalised due to gender, race, sexuality, disability or being a first-generation and/or international student. These challenges are not new, but awareness of them has increased over the past decade, as have efforts by institutions to make students feel supported.

Voluntary wheel running mitigates disease in an Orai1 gain-of-function mouse model of tubular aggregate myopathy.

Tubular aggregate myopathy (TAM) is an inherited skeletal muscle disease associated with progressive muscle weakness, cramps, and myalgia. Tubular aggregates (TAs) are regular arrays of highly ordered and densely packed SR straight-tubes in muscle biopsies; the extensive presence of TAs represent a key histopathological hallmark of this disease in TAM patients. TAM is caused by gain-of-function mutations in proteins that coordinate store-operated Ca entry (SOCE): STIM1 Ca sensor proteins in the sarcoplasmic reticulum (SR) and Ca-permeable ORAI1 channels in the surface membrane.

Cryptogenic Hypervirulent Klebsiella pneumoniae Pyogenic Liver Abscess: A Case Report.

BACKGROUND Klebsiella pneumoniae is a gram-negative organism known to cause pyogenic liver abscesses. It is most often caused by one of the hypervirulent strains, which are capable of causing metastatic infection. This occurs most commonly in Asia in patients without hepatobiliary disease; however, it is becoming increasingly recognized in North America.

The Future of Laboratory Chemistry Learning and Teaching Must be Accessible.

This commentary is a call to make the future of chemistry laboratories accessible and inclusive. We draw from research and lived experience to put forward a list of recommendations for laboratory-based teaching. Our authorial team includes undergraduate and postgraduate chemistry students, graduate teaching assistants, teaching-focused and traditional research and teaching academics, and a Diversity Equality Inclusion (DEI/EDI) academic expert.

Consistency of reports of violence from northern Rakhine state in August 2017.

Background: In August 2017, Myanmar's Armed Forces, the Tatmadaw, launched an orchestrated attack on hundreds of Rohingya-majority villages in northern Rakhine state. This study seeks to validate the consistency of previous reports of violence against the Rohingya people in the region carried out by the Tatmadaw, Border Guard Police, and Rakhine villagers in the late summer and early fall of 2017.

Methods: Internal validation data is from a three-armed study.

Autistic women's views and experiences of infant feeding: A systematic review of qualitative evidence.

Mothers are encouraged to breastfeed their babies due to known health benefits for both babies and mothers. However, although breastfeeding is 'natural', that does not make it easy and many women experience challenges. Autistic women may face additional barriers to breastfeeding when compared to neurotypical women.

Seeking justice amidst chaos: methods to identify and document individuals implicated in crimes against the Rohingya in August 2017.

Background: Documenting perpetrators of human rights violations enables effective prosecution and can help prevent future atrocities. Doing so calls for collecting reliable data using verifiable and transparent methodology. We present methods used to document crimes and identify alleged perpetrators implicated in the 2017 attacks against Rohingya civilians in Myanmar.

Managing research throughout COVID-19: Lived experiences of supramolecular chemists.

The international Women in Supramolecular Chemistry network believes that taking an area-specific approach effectively supports equality, diversity, and inclusion. Science lacks diversity, and this is intersectional. We share effects of coronavirus disease 2019 (COVID-19) by triangulating findings from an online survey, a collaborative autoethnography, and reflective group research meetings.

Streptococcus agalactiae infective endocarditis in Canada: a multicenter retrospective nested case control analysis.

Background: Infective endocarditis (IE) caused by Streptococcus agalactiae (GBS) is increasingly reported and associated with an aggressive course and high mortality rate. Existing literature on GBS IE is limited to case series; we compared the characteristics of patients with GBS IE to patients with GBS bacteremia without IE to identify risk factors for development of IE.

Methods: A nested case-control study in a cohort of adult patients with GBS bacteremia over a 18-year period was conducted across seven centres in three Canadian cities.

An Area-Specific, International Community-Led Approach to Understanding and Addressing Equality, Diversity, and Inclusion Issues within Supramolecular Chemistry.

Diversity, equality, and inclusion (DEI/EDI) are pressing issues in chemistry and the natural sciences. In this Essay we share how an area-specific approach is "calling in" the community so that it can act to address EDI issues, and support those who are marginalised. Women In Supramolecular Chemistry (WISC) is an international network that aims to support equality, diversity, and inclusion within supramolecular chemistry.

Outcomes and costs of skilled support for people with severe or profound intellectual disability and complex needs.

Background: With increasing reductions in funding for social care across many countries, the need to ensure that resources are used to best effect is becoming increasingly important, in particular for those with severe and complex needs.

Methods: In order to explore the outcomes and costs of skilled support for this group of people, quality of life was assessed for 110 people in 35 services in England. Information on costs was also collected.

Antibiotic prophylaxis for prevention of urinary tract infections in the first year of life in children with vesicoureteral reflux diagnosed in the workup of antenatal hydronephrosis: a systematic review.

Background: Children with antenatal hydronephrosis (ANH) diagnosed with postnatal asymptomatic vesicoureteral reflux (VUR) are thought to be at higher risk of urinary tract infection (UTI). As such, continuous antibiotic prophylaxis (CAP) is empirically recommended until age of toilet training; however, there are limited data to support this. The objective of this systematic review was to summarize the existing data and compare UTI rates in infants with asymptomatic VUR on CAP during the first year of life, to those not on CAP.