Publications by authors named "A R Marks"

Conjugated polymers (CPs) with polar side chains can conduct electronic and ionic charges simultaneously, making them promising for bioelectronics, electrocatalysis and energy storage. Recent work showed that adding alkyl spacers between CP backbones and polar side chains improved electronic charge carrier mobility, reduced swelling and enhanced stability, without compromising ion transport. However, how alkyl spacers impact polymer backbone conformation and, subsequently, electronic properties remain unclear.

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Background: Synovial macrophages (SMs) are important effectors of joint health and disease. A novel Cx3CR1 + TREM2 + SM population expressing the tight junction protein claudin-5, was recently discovered in synovial lining. Ablation of these SMs was associated with onset of arthritis.

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We present a case of insatiable appetite and harmful overeating in a hospice patient that showcases the burden of hypothalamic hyperphagia, a rare complication of brain cancer. While confounders exist such as progression of disease and prior tapering of dexamethasone, in this case the initiation of metformin was associated with substantial appetite reduction and resolution of our patient's debilitating food-seeking behaviors. We will explore metformin as a potential cost-effective option for palliation in a hospice setting and explore some of the physiologic mechanisms involved.

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Article Synopsis
  • Malignant hyperthermia (MH) is a serious genetic condition triggered by certain anesthetics, particularly affecting a protein called RyR1.
  • Dantrolene is the main treatment for MH, but how it works and where it binds on RyR1 was previously unclear.
  • This study used cryo-electron microscopy to detail how dantrolene and another agent bind to RyR1, revealing that dantrolene's binding requires ATP or ADP and can close the channel, highlighting its potential role in sensing energy levels in cells.
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Article Synopsis
  • Scientists found a special type of cells called synovial macrophages which help keep joints healthy and can become unhealthy in arthritis.
  • They studied a protein called PRG4 which helps to keep the joints smooth and looked at how it affects these cells and inflammation using special mice that could turn off the PRG4 gene.
  • Results showed that when PRG4 was turned off, it caused more inflammation and problems in the joints, but using a medicine called febuxostat helped reduce these issues and keep the healthy cells alive.
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