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New Study Reveals Link Between Stress, Immune Cells, and Depression

14 August 2025
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News Bite: How Stress Affects Our Brain & Mood

  • Scientists found that when someone has long-term stress, special immune cells called neutrophils (they usually fight germs) leave the bones in the skull and go into the brain’s protective covering.
  • These immune cells hanging out in the brain seem to cause symptoms of depression (sadness, lack of energy, feeling down). 
  • In experiments with mice, turning off a particular “alarm” signal (called type I interferon) reduced those neutrophils in the brain and made the mice act less depressed. 

Why This Matters

  • Many people don’t respond well to regular antidepressants — about 1 in 3
  • This new research suggests that for some, inflammation (immune response) is playing a big role. If we can target that, we might help people who haven’t gotten better with usual treatments.

The NuroSpark Way Forward

  • We’ll keep updating our courses and workshops to include info about how the immune system and inflammation relate to mental health — so our students know all sides of depression.
  • We aim to offer training in early signs of immune-related stress, stress management tools that reduce inflammation (like better sleep, movement, calming practices).
  • And, we’re exploring partnerships (with researchers and clinics) so we can bring newer therapies — those that go beyond just “chemical fixes” — to people who need more help.

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Manish Arora

Manish Arora Trauma & PTSD Specialist | EMDR Practitioner

10 years experience
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M.Phil in Clinical Psychology – NIMHANS, 2012, RCI Registered
Trauma Recovery & PTSD Military & Accident Trauma Cases Panic Disorders & Anxiety Emotional Regulation & Stress Management EMDR & Somatic Therapies
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Dr. Kavya Iyer Child Psychologist | Learning & Development Specialist

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M.Phil in Child Psychology – AIIMS, 2017 MA in Psychology – University of Mumbai, 2014 Certified Play Therapist, 2018 RCI Registered
Childhood Anxiety & Fears ADHD & Learning Difficulties Play Therapy Parent-Child Bonding Autism Spectrum Support
Aarav Sinha

Aarav Sinha Senior Clinical Psychologist

12 years experience
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M.Phil in Clinical Psychology – NIMHANS, 2015 MA in Psychology – Tata Institute of Social Sciences (TISS), 2012 Certified REBT Practitioner, 2019 RCI Registered
Anxiety Issue, CBT & REBT, Bipoler Disorder Support

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