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Metabolomic Analysis of Rat Brain by High Resolution Nuclear Magnetic Resonance Spectroscopy of Tissue Extracts
Published on: September 21, 2014
[Raman spectra of monkey cerebral cortex tissue]
Ji-chun Zhu1, Jian-yu Guo, Wei-ying Cai
1State Key Laboratory of Precision Spectroscopy and Technique, Department of Physics, East China Normal University, Shanghai 200062, China.
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|March 23, 2010
Summary
Raman spectroscopy reveals significant changes in monkey cerebral cortex composition with age. Increased lipid content, indicated by specific Raman bands, correlates with aging and may contribute to cognitive decline.
Area of Science:
- Neuroscience
- Biochemistry
- Spectroscopy
Context:
- The cerebral cortex is crucial for cognitive functions.
- Understanding age-related changes in brain tissue is vital for neuroscience and medicine.
Purpose:
- To investigate age-dependent alterations in monkey cerebral cortex composition using in situ Raman spectroscopy.
- To identify spectral markers associated with aging and lipid content changes.
Summary:
- Raman spectra of monkey cerebral cortex showed distinct age-related changes, particularly in lipid and protein vibrational modes (1000-1400 and 2800-3000 cm⁻¹).
- Lipid markers (CH2 modes) increased, while protein markers (CH3 modes) decreased with age.
- New bands at 1296 and 2850 cm⁻¹ were identified in aged monkeys, serving as potential aging markers.
Impact:
- Establishes lipid-to-protein ratios derived from Raman spectroscopy as quantitative measures of cerebral cortex aging.
- Suggests excessive lipid accumulation is a key factor in brain aging.
- Provides a valuable tool for studying life-cycle development and diagnosing age-related neurological diseases.
Related Concept Videos
01:20Raman Spectroscopy: Overview
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
01:26Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...