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Intranasal Administration of CNS Therapeutics to Awake Mice
Published on: April 8, 2013
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High-pressure physiological saline isotonic solution administration enhances brain NGF and NGF-receptors expression
F Salvinelli1, V Frari, M L Rocco
1Department of Otolaryngology, Campus Bio-Medico University, School of Medicine, Rome, Italy. luigialoe@cnr.it.
European Review for Medical and Pharmacological Sciences
|November 5, 2015
Summary
High-pressure saline solution nasal spray significantly increases nerve growth factor (NGF) in rat brains. This novel approach enhances neurotrophic signals, offering potential for neuroprotection and treating brain aging and Alzheimer's Disease.
Area of Science:
- Neuroscience
- Pharmacology
- Biomedical Research
Background:
- Nerve growth factor (NGF) is crucial for neuronal survival, particularly in the peripheral nervous system.
- Declining NGF levels are implicated in neurodegenerative conditions like Alzheimer's Disease and brain aging.
- Existing therapies for neuroprotection often have limitations.
Purpose of the Study:
- To investigate the effect of high-pressure physiological saline solution (HpPSIS) nasal administration on NGF levels and receptor expression in rat olfactory bulbs and brain.
- To explore a novel method for enhancing endogenous NGF production.
Main Methods:
- Adult female Sprague Dawley rats (n=48) were divided into HpPSIS-treated and control groups.
- HpPSIS was administered intranasally using a specialized spray device three times daily for 5 or 10 consecutive days.
- Control groups received saline via a standard syringe without high pressure.
Main Results:
- HpPSIS treatment led to a significant increase in NGF levels in olfactory bulbs and brain regions (OB, ST, HI, CX).
- A >25% increase in NGF was observed after 5 days of HpPSIS treatment compared to controls.
- NGF levels continued to rise with 10 days of HpPSIS treatment, showing statistically significant differences (p < 0.05).
Conclusions:
- Forced intranasal administration of HpPSIS effectively enhances endogenous NGF production in the olfactory bulbs and forebrain.
- This method shows potential for protecting NGF-dependent neurons, particularly cholinergic neurons affected in aging and Alzheimer's Disease.
- Longer durations of HpPSIS treatment may further elevate NGF levels, suggesting a promising therapeutic avenue.
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