Publications by authors named "P I MacKenzie"

Aims: To (i) determine the actual radiotherapy utilization (RTU) stratified by age, (ii) develop an age- and co-morbidity adjusted optimal RTU model and (iii) examine the tolerance and toxicity of treatment of older patients with head and neck cancer.

Materials And Methods: A retrospective cohort study based on New South Wales Cancer Registry records (2010-2014) linked to radiotherapy data (2010-2015) and admitted patient data (2008-2015) for patients diagnosed with head and neck cancer. We calculated the actual RTU, defined as the proportion of patients who received at least one course of radiotherapy within a year of diagnosis, by age group, including patients aged 80+ years.

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Article Synopsis
  • Human UDP-glucuronosyltransferases (UGTs) are essential for metabolizing and clearing various small compounds, with the UGT1A locus producing multiple mRNA variants through extensive splicing.
  • This study identifies novel splice junctions and 24 variant UGT1A transcripts, particularly highlighting 1A8_n2, which is more abundant in cancerous colorectal tissues compared to normal tissues.
  • Despite predictions of protein expression from variants, the study finds that the 1A8_n2 protein lacks activity, suggesting that these variants may negatively regulate UGT function through altered splicing mechanisms.
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The locus generates over 60 different alternatively spliced transcripts and 30 circular RNAs. To date, v2 and v3 transcripts are the only variant UGT1A transcripts that have been functionally characterized. Both v2 and v3 transcripts encode the same inactive variant UGT1A proteins (i2s) that can negatively regulate glucuronidation activity and influence cancer cell metabolism.

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Background: The role of child welfare workers is twofold, to promote the safety of children and youth and to address their wellbeing. This provincially legislated mandate requires child welfare workers to make decisions across the child welfare service continuum. After a report of child maltreatment is investigated, workers are required to assess the veracity of the allegation through the substantiation decision and to determine whether the child has been victimized, which may impact on families' future involvement with services.

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Introduction: Optimal radiotherapy utilisation (RTU) modelling estimates the proportion of people with cancer who would benefit from radiotherapy. Assessment of comorbidities is an important component of the assessment of suitability for radiotherapy in addition to chronological age and life expectancy. Comorbidities have not been considered in previous optimal RTU models.

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