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Chronic Stress and Headaches: The Role of the HPA Axis and Autonomic Nervous System

Chronic stress significantly influences the pathogenesis of headache disorders, affecting millions worldwide. This review explores the intricate relationship between stress and headaches, focusing on the dysregulation of the hypothalamic–pituitary–adrenal (HPA) axis and autonomic nervous system (ANS). Persistent stress could lead to neuroinflammation, increased pain sensitivity, and vascular changes that could contribute to headache development and progression. The bidirectional nature of this relationship creates a vicious cycle, with recurrent headaches becoming a source of additional stress. Dysregulation of the HPA axis and ANS imbalance could amplify susceptibility to headaches, intensifying their frequency and severity. While pharmacological interventions remain common, non-pharmacological approaches targeting stress reduction, such as cognitive-behavioral therapy, biofeedback, and relaxation techniques, offer promising avenues for comprehensive headache management. By addressing the underlying stress-related mechanisms, these approaches provide a sustainable strategy to reduce headache frequency and improve patients’ quality of life.

JCI: Department of Immunology and Inflammation, Imperial College London, London, United Kingdom

2 School of Medicine, Chang Gung University and Division of Rheumatology, Allergy and Immunology, Chang Gung Memorial Hospital, Taoyuan, Taiwan.

3Imperial Lupus Centre, Imperial College Healthcare NHS Trust, London, United Kingdom.

3D DNA mapping in rare immune cells reveals new genes linked with autoimmune disease risk

Our DNA is often pictured as a simple spiral, like a piece of rope held taut. But inside cells, it folds into a complex three-dimensional structure, with 2 meters (6.6 feet) of DNA scrunched like a headphone wire in a pocket. This bundled architecture plays a crucial role in how genes are switched on and off. Understanding these interactions is key to interpreting genetic studies of disease and can help develop targeted treatments.

Genes—the instructions for making proteins—are regulated by two types of DNA regions, called promoters and enhancers. Promoters are located at the start of each gene and directly load the machinery that reads it to produce RNA, a template for making proteins. In contrast, enhancers, which act like “molecular switches” boosting gene activity in the right cell and condition, may be found much further from the genes they control: sometimes many thousands or even millions of DNA letters away. When DNA folds in the 3D space of the cell’s nucleus, these enhancers loop around to physically contact the genes they regulate.

Understanding how enhancers work and which genes they control is particularly important because genome-wide association studies—large-scale efforts comparing the DNA of thousands of people to identify small genetic differences linked to disease—have revealed many genetic variants associated with complex conditions such as Crohn’s disease that sit within these regions. Crohn’s disease is a common form of inflammatory bowel disease, which affects around 1 in 100 people globally and currently has no known cure.

Abstract: Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut, USA

2 Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA.

3Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.

A crossvertebrate brain protein interaction map identifies conserved neural and nonneural complexes

Dang et al. use co-fractionation and immunoprecipitation mass spectrometry to map protein interactions conserved across vertebrate brains. This resource, dubbed VerteBrain, offers insights into brain protein function and new links between proteins and disease, identifying candidate genes and pathways involved in epilepsy, deafness, and developmental disorders.

How the TARDIS Cheats the Laws of Physics

What if the TARDIS isn’t just science fiction… but a glimpse into physics far beyond our understanding?

The TARDIS is one of the most iconic machines ever created. It’s bigger on the inside, travels through time, ignores the speed of light, and somehow arrives exactly where the Doctor is needed.

But could any of this have a scientific explanation?

In this video, we explore the real physics behind Doctor Who’s greatest invention, including:

• Why the TARDIS is bigger on the inside.
• Pocket universes and higher dimensions.
• The Time Vortex explained.
• Could wormholes or extra dimensions make it possible?
• The Eye of Harmony and limitless energy.
• Why the TARDIS appears to be alive.
• Time travel, causality and paradoxes.
• Fixed points in time.
• Could humanity ever build something remotely similar?

Using concepts from modern theoretical physics—including Einstein’s relativity, extra dimensions, wormholes, and causality—we compare real science with one of the greatest fictional technologies ever imagined.

Broth Optical DensityBased Assessment for Phage Therapy: Turbidity Reduction, Antibacterial Virulence, and TimeKill

Phage therapy is the use of bacterial viruses, or bacteriophages, as antibacterial agents. It has been in use for over 100 years and is becoming increasingly common clinically. The first steps of phage therapy include identification of bacteria to be targeted and then obtaining phages with appropriate host ranges. This is followed by various approaches to in vitro phage characterization. Increasingly common for phage phenotypic characterization is the use of kinetic microtiter plate readers. They can both decrease workloads and increase throughput, especially relative to analyses that require plating on agar-based media. These colorimetric/turbidimetric/optical density approaches primarily assess phage-induced culture-wide bacterial lysis, in the shorter term, or instead the phage potential to suppress phage-resistance evolution over longer time frames. Considered here are methods relevant to phage characterization especially for phage-therapy purposes. Discussed are turbidity-reduction assays, determinations of phage antibacterial virulence, and related time-kill curve analysis. All are or can be optical density-based approaches to assessing phage-based bacterial reduction. Emphasis is placed on consideration of the utilities, limitations, and intersections of these similar methods. Emphasized is that the start of “Deviation”—where phage-treated culture turbidity diverges from phage-free controls—may represent a superior endpoint for such optical density-based bacterial-reduction protocols.

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