Background: Previous pharmacological validations of the rat mono-iodoacetate (MIA)-induced chronic joint pain model were mostly performed by measuring weight-bearing (WB) deficit with an incapacitance tester. However, conventional incapacitance testers have several drawbacks including restrain stress on animal and sole use of hind limbs WB.
Objectives: The aim of the present study was to compare pharmacological sensitivity of the early (up to 1 week after MIA) versus late (between 2 and 4 weeks after MIA) phase of the rat MIA model using a highly sensitive tactile pressure measurement system (Tekscan(®)), which can measure weight borne by all four limbs and the tail in a non-restrained animal.
Methods: The Tekscan(®) WB measurement system was used in MIA rats to examine the acute and chronic dosing effects of drugs that targeted different mechanisms. Electrophysiological recordings from joint afferents and biochemical analysis of synovial fluid were also performed.
Results: Dexamethasone, duloxetine and morphine significantly alleviated WB deficits in the Tekscan(®) system during both early and late phase of the MIA model while celecoxib and naproxen alleviated WB deficit only during the early phase. Similarly, naproxen was able to inhibit spontaneous neuronal activity from MIA joint afferents only during the early phase. Finally, concentrations of prostaglandin E(2) in synovial fluid were elevated only during the early phase of the rat MIA model.
Conclusions: Our pharmacological validation studies using the Tekscan(®) system along with electrophysiological and biochemical results suggest different mechanisms for early and late phase of MIA-induced chronic joint pain in rat.
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http://dx.doi.org/10.1002/j.1532-2149.2012.00176.x | DOI Listing |
BMC Cancer
January 2025
Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.
Background: The COVID-19 pandemic affected healthcare systems worldwide, disrupting elective surgeries including those for cancer treatment. This study examines the effects of the pandemic on outcomes of pancreatic cancer surgeries at a specialized high-volume surgery center.
Materials And Methods: This study compared surgical volume and outcomes of pancreas resections between the pre-pandemic (January 2019 to February 2020), early pandemic (March 2020 to January 2021), and late pandemic (February 2021 to December 2021) periods.
BMC Public Health
January 2025
Department of Women & Children's Health, King's College London, London, UK.
Background: Recurrent early pregnancy loss [rEPL] is a traumatic experience, marked by feelings such as grief and depression, and often anxiety. Despite this, the psychological consequences of rEPL are often overlooked, particularly when considering future reproductive health or approaching subsequent pregnancies. The SARS-CoV-2 pandemic led to significant reconfiguration of maternity care and a negative impact on the perinatal experience, but the specific impact on women's experience of rEPL has yet to be explored.
View Article and Find Full Text PDFNature
January 2025
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
Evaporation or freezing of water-rich fluids with dilute concentrations of dissolved salts can produce brines, as observed in closed basins on Earth and detected by remote sensing on icy bodies in the outer Solar System. The mineralogical evolution of these brines is well understood in regard to terrestrial environments, but poorly constrained for extraterrestrial systems owing to a lack of direct sampling. Here we report the occurrence of salt minerals in samples of the asteroid (101955) Bennu returned by the OSIRIS-REx mission.
View Article and Find Full Text PDFPediatr Cardiol
January 2025
Pediatric Intensive Care Department, Wolfson Medical Center, Holon, Israel.
Research establishing factors associated with duration of mechanical ventilation after Tetralogy of Fallot repair, is mainly based on population presenting at early infancy. There are fewer reports regarding repair after infancy, during childhood and preadolescence. To compare two groups of late TOF repair based on post-operative invasive mechanical ventilation duration and explore associations with pre-operative clinical markers of severity of right ventricular outflow tract obstruction.
View Article and Find Full Text PDFBr J Ophthalmol
January 2025
Ocular Oncology Service, Moorfields Eye Hospital NHS Foundation Trust, London, UK.
Background/aims: To report the long-term visual outcomes and side effects in patients with small choroidal melanoma (CM) undergoing ruthenium-106 (Ru-106) plaque brachytherapy.
Methods: Retrospective, interventional, consecutive series of small CM ≤2.5 mm in height and ≤16 mm in largest basal diameter treated with Ru-106 plaque with a median radiation dose of 100 Gy prescribed to tumour apical height.
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