Centre Hospitalier Universitaire (CHU) de Québec-Université Laval

The goal of this clinical trial is to study a personalized regime of lutetium-177 (177Lu) prostate-specific membrane antigen (PSMA) radiopharmaceutical therapy (RPT) in patients with progressive and/or symptomatic, inoperable PSMA-expressing cancers of prostatic or other origins.
The main questions it aims to answer are:
* To establish a dosimetry-based, personalized regime of 177Lu-PSMA
* To report on the efficacy of personalized 177Lu-PSMA
Participants (stratified by risk factors of toxicity) will receive up to 6 cycles of a personalized activity of 177Lu-PSMA based on renal dosimetry. In the phase 1, the prescribed absorbed dose to the kidney will be escalated, to determine the regime that will be administered in the phase 2. The best response within 12 months after the first cycle will be assessed. Salvage treatment of 3 cycles may be offered to responders after re-progression.

Metabolic dysfunction-associated steatotic liver disease (MASLD) (aka non-alcoholic fatty liver disease), commonly occurring in individuals with obesity and type 2 diabetes can lead to liver inflammation/ fibrosis. MASLD results from fat being disproportionately deposited in the liver.
The goal of this mechanistic study is to investigate metabolic response in patients aged 50 to 80 years with non-alcoholic fatty liver disease, after niacin (vitamin B3) treatment.
The main questions it aims to answer are:
* Does Niacin lower the fat deposition in the liver?
* Does Niacin raise White Adipose Tissue storage of dietary fatty acids?
Researchers will compare Niacin to a placebo (a look-alike substance that contains no drug) to compare the metabolic response.
Duration of study per participant: Up to 28 weeks

The study will be a phase III double-blind randomized clinical trial. Participants will be recruited from the Department of General Surgery of the CHU de Québec - Saint-François-d'Assise and Hôtel-Dieu de Québec. The primary outcomes are the incidence of postoperative urinary retention in men undergoing rectal resection and the efficacy of prophylactic tamsulosin to prevent this type of complication.The secondary outcomes are the length of stay between experimental and placebo groups, the number of urinary catheterizations, the number of urine catheter reinsertions and total duration of urinary catheter being in-situ.