16,033 results match your criteria: "Medical College of Georgia[Affiliation]"

KCTD1 regulation of Adenylyl cyclase type 5 adjusts striatal cAMP signaling.

Proc Natl Acad Sci U S A

October 2024

Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912.

Dopamine transfers information to striatal neurons, and disrupted neurotransmission leads to motor deficits observed in movement disorders. Striatal dopamine converges downstream to Adenylyl Cyclase Type 5 (AC5)-mediated synthesis of cAMP, indicating the essential role of signal transduction in motor physiology. However, the relationship between dopamine decoding and AC5 regulation is unknown.

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  • Oleanolic acid (OA) and Ursolic acid (UA) are bioactive compounds that show potential anti-cancer effects, particularly at low doses (5-10 µM) against breast cancer cells, despite their low bioavailability from oral intake.
  • Research indicates that OA and UA induce cell death in breast cancer (BrCa) cells primarily through autophagy rather than apoptosis, and this effect can be enhanced by inhibiting specific survival pathways (PI3K/Akt/mTOR).
  • Combining OA and UA with a PI3K inhibitor effectively increases their anti-cancer activity, suggesting this combination warrants further testing in clinical trials for treating breast cancer.
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: This study investigates whether there is an increased propensity to systemic conditions in patients with both age-related macular degeneration (AMD) and glaucoma in order to provide greater insight into patients' overall health and response to physiologic stress. : A large retrospective dataset review was conducted between April 2004 and June 2018, distinguishing four groups based on international classification of diseases (ICD) codes: glaucoma only, AMD only, glaucoma and AMD, and cataracts only (as an age-matched control). The systemic disease prevalence of each group was calculated, and a Friedman analysis was used to compare the prevalence between the groups.

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Endothelial ENaC-α Restrains Oxidative Stress in Lung Capillaries in Murine Pneumococcal Pneumonia-associated Acute Lung Injury.

Am J Respir Cell Mol Biol

October 2024

Medical College of Georgia, Vascular Biology Center, Pharmacology and Toxicology, Pulmonary, Critical Care Medicine, Augusta, Georgia, United States;

Infection of lung endothelial cells with pneumococci activates the superoxide-generating enzyme NADPH oxidase 2 (NOX2), involving the pneumococcal virulence factor pneumolysin (PLY). Excessive NOX2 activity disturbs capillary barriers, but its global inhibition can impair bactericidal phagocyte activity during pneumococcal pneumonia. Depletion of the α subunit of the epithelial sodium channel (ENaC) in pulmonary endothelial cells increases expression and PMA-induced activity of NOX2.

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The ongoing obesity epidemic has raised awareness of the complex physiology of adipose tissue. Abnormal adipocyte differentiation results in the development of systemic metabolic disorders such as insulin resistance and diabetes. The conjugation of NEDD8 (neural precursor cell expressed, developmentally downregulated 8) to target protein, termed neddylation, has been shown to mediate adipogenesis.

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  • Traditional methods of genetically modifying mice are complex and time-consuming, requiring advanced techniques and often taking over a year with uncertain outcomes.
  • The CRISPR gene-editing system has simplified this process, allowing for efficient and successful modifications in mice and other animal models.
  • This text introduces a streamlined approach using prime editing, detailing three basic protocols for creating genetically modified mice: designing engineered RNA, microinjecting components into zygotes, and genotyping founder mice for breeding.
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p53 dependence of senescence markers p21v1 and p21v2 in aging and acute injury.

NPJ Aging

October 2024

Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, USA.

The senescence phenotype is heterogeneous, as observed by the context-dependent differential expression of senescence markers. Here, we provide evidence to demonstrate an inverse relationship in the expression pattern of the two murine variants of p21 (p21v1, and p21v2) in aging and hemorrhagic shock. While an upregulation of p21v1 was observed following hemorrhagic shock injury, p21v2 was upregulated in the aged mouse.

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Background: Despite recent improvements in melanoma survival rates, persistent inequalities pose barriers to care for some patients.

Objective: To assess the influence of social determinants of health (SDoH) on melanoma treatment outcomes.

Methods: A systematic review (Prospective Register of Systematic Reviews CRD42022346854) of manuscripts that examined the association between SDoH and melanoma treatment-related outcomes in the United States was conducted using 5 databases.

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  • * Although chemotherapy is the standard treatment for cervical cancer in Sub-Saharan Africa, it has not delivered the expected survival rates, especially for patients diagnosed with advanced stages of the disease.
  • * Immune checkpoint inhibitors have shown promise in improving survival for advanced cervical cancer and are included in treatment guidelines in high-income countries, but many African nations face challenges in accessing and utilizing these therapies effectively.
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This case report describes a 27-year-old healthy female patient undergoing bilateral salpingectomy for sterilization who experienced sudden bradycardia following induction with propofol (2, 6 diisopropylphenol) and succinylcholine. Despite lacking prior cardiac issues, the patient's heart rate dropped precipitously, necessitating intervention with glycopyrrolate. This case report highlights the importance of premedication with anticholinergics to prevent bradycardia in similar scenarios, underscoring the need for vigilance and preparedness to manage adverse cardiac events during anesthesia induction, even in patients without evident risk factors.

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  • An epinephrine nasal spray (ENS) is being developed as an alternative to the standard intramuscular (IM) epinephrine for treating anaphylaxis.
  • A study compared the pharmacokinetic (how the drug is processed in the body) and pharmacodynamic (effects on the body) profiles of a 13.2 mg ENS with a 0.3 mg IM autoinjector among healthy adults.
  • Results showed that ENS produced higher and more sustained plasma epinephrine concentrations compared to the IM autoinjector, with similar impacts on heart rate and blood pressure across both treatments.
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  • Alternative splicing in the VEGF-A gene leads to two isoforms, VEGFa and VEGFb, which have different effects on blood vessel growth due to a 6-amino acid difference.
  • VEGFb activates the VEGFR2 receptor but not the VEGFR1 receptor, while modifications to VEGFb can enhance its functionality, activating both pathways for better angiogenic response.
  • The study reveals that changing specific amino acid residues in VEGFb can create a variant that activates both VEGFR1 and VEGFR2, promoting better recovery in a model of peripheral artery disease compared to VEGFa.
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  • Disorders of Sexual Development (DSDs) involve unusual patterns in gonadal and genital development, occurring in about 1 in 5,000 live births.
  • Individuals with DSDs may have a higher risk of developing cancerous tumors in the gonads and reproductive tract.
  • This report highlights ovotesticular DSD (OT-DSD), which features both ovarian and testicular tissues, and shares a case of a 71-year-old phenotypically male XY patient who was diagnosed with aggressive peritoneal cancer.
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Neurotoxicology of warfare arsenical, diphenylarsinic acid in humans and experimental models.

Chemosphere

November 2024

UAB Research Centre of Excellence in Arsenicals, Department of Dermatology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294, USA. Electronic address:

Article Synopsis
  • * DPAA, a degradation product of other chemical agents, has been linked to neurological damage and behavioral deficiencies in residents of Kamisu, Japan, due to contaminated underground water.
  • * Long-term monitoring (around 15 years) and animal studies, including primates and mice, confirm that exposure to DPAA results in significant neurological damage, affecting the cerebellum and brainstem.
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  • A clinical study was conducted to assess the effect of a neurocosmetic cream on reducing discomfort and enhancing recovery after radiofrequency (RF) microneedling in 11 healthy female subjects.
  • Results showed that the neurocosmetic was well-tolerated and effectively reduced skin irritation, with 83% of participants agreeing it helped reduce post-procedure irritation after 24 hours.
  • By the end of the study, 100% of participants reported a positive experience and a desire to return for further treatments, indicating the cream's efficacy over a leading comparator.
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ALSUntangled #76: Wahls protocol.

Amyotroph Lateral Scler Frontotemporal Degener

October 2024

Department of Neurology, Duke University, Durham, NC, USA.

Article Synopsis
  • - The Wahls diet is a specialized version of the Paleolithic diet, focusing on nutrient-rich foods like leafy greens and omega-3 fatty acids while limiting processed foods and sugars, aiming to reduce inflammation and oxidative stress.
  • - While some studies link components of the Wahls diet, like high carotenoids and omega-3s, to reduced ALS risk, there is no solid evidence proving it slows ALS progression, with conflicting results from animal model research.
  • - Additionally, the Wahls diet has led to significant weight loss in people with multiple sclerosis, raising concerns since weight loss can worsen ALS, leading to the conclusion that the diet shouldn't be endorsed for ALS patients.
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International Survey on Consensus Definition on Nutrition Impact Symptoms in Patients with Cancer.

Nutr Cancer

December 2024

Division of Palliative Medicine, Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, USA.

A self-reported electronic questionnaire to advocate for a consensus definition of nutrition impact symptoms (NISs) was conducted in a diverse group of international healthcare providers. The questionnaire had 2 components: the definition of NISs and the relevance of each symptom as a NIS. Agreement on the tentative definition and 24 symptoms were evaluated using a seven-point Likert scale.

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3-D bioprinting is a promising technology to fabricate custom geometries for tissue engineering. However, most bioprintable hydrogels are weak and fragile, difficult to handle and cannot mimetic the mechanical behaviors of the native soft elastic tissues. We have developed a visible light crosslinked, single-network, elastic and biocompatible hydrogel system based on an acrylated triblock copolymer of poly(ethylene glycol) PEG and polycaprolactone (PCL) (PEG-PCL-DA).

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Testamentary Capacity: The Glass Testamentary Capacity Measure (G-TCM).

Am J Geriatr Psychiatry

February 2025

Northeast Georgia Medical Center (OMG), Northeast Georgia Health System, Gainesville, GA; Medical College of Georgia (OMG), Augusta University and University of Georgia Medical Partnership, Gainesville, GA. Electronic address:

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PD-L1 restrains PD-1Nrp1 Treg cells to suppress inflammation-driven colorectal tumorigenesis.

Cell Rep

October 2024

Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912, USA; Georgia Cancer Center, Augusta, GA 30912, USA; Charlie Norwood VA Medical Center, Augusta, GA 30904, USA. Electronic address:

T cells function not only as an essential component of host cancer immunosurveillance but also as a regulator of colonic inflammation, a process that promotes colorectal cancer. Programmed death-ligand 1 (PD-L1) is a T cell-negative regulator, but its role in regulation of T cell functions in the context of colorectal cancer is unknown. We report that global deletion of Cd274 results in increased colonic inflammation, PD-1 T cells, and inflammation-driven colorectal tumorigenesis in mice.

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  • * Recent efforts to stop smoking haven't been put into action yet, and it’s important to see what could happen if smoking rates stay the same or improve.
  • * Researchers used models to predict health outcomes by 2050 based on different scenarios of smoking rates, showing that cutting smoking could greatly improve health and life expectancy.
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