Functional Interrogation of Adult Hypothalamic Neurogenesis with Focal Radiological Inhibition

Daniel A. Lee; Juan Salvatierra; Esteban Velarde; John Wong; Eric C. Ford; Seth Blackshaw

doi:10.3791/50716

Interrogatorio funzionale di età ipotalamico neurogenesi con focale Radiological inibizione

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Neuroscience

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JoVE Journal Neuroscience

Functional Interrogation of Adult Hypothalamic Neurogenesis with Focal Radiological Inhibition

Interrogatorio funzionale di età ipotalamico neurogenesi con focale Radiological inibizione

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11:45 min

November 14, 2013

DOI: 10.3791/50716-v

Daniel A. Lee^1,2, Juan Salvatierra², Esteban Velarde³, John Wong³, Eric C. Ford⁴, Seth Blackshaw^2,5

¹Division of Biology,California Institute of Technology, ²Solomon H. Snyder Department of Neuroscience, Neurology, and Ophthalamology,Johns Hopkins University School of Medicine, ³Department of Radiation Oncology & Molecular Radiation Sciences,Johns Hopkins University School of Medicine, ⁴Department of Radiation Oncology,University Of Washington Medical Center, ⁵Institute for Cell Engineering and High-Throughput Biology Center,Johns Hopkins University School of Medicine

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Overview

This article describes an advanced radiological technique for performing focal irradiation on small animal models to inhibit neurogenesis. The method utilizes computer tomography-guided three-dimensional imaging to accurately target specific neural progenitor populations.

Key Study Components

Area of Science

Neuroscience
Radiology
Neurogenesis

Background

Adult-born mammalian neurons are crucial for various brain functions.
Ionizing radiation can inhibit the birth of new neurons.
Advanced imaging techniques enhance targeting precision.
Understanding neurogenesis can provide insights into brain health and disease.

Purpose of Study

To describe a technique for focal irradiation in small animal models.
To assess the functional role of adult neurogenesis.
To demonstrate the effects of radiation on specific neural progenitor populations.

Methods Used

Computer tomography-guided three-dimensional volumetric imaging for localization.
Calculation of radiation delivery and duration to the targeted area.
Film-based calibration for accurate radiation dosing.
Direct visualization of the radiation beam in tissue for accuracy assessment.

Main Results

Successful targeting of specific neural progenitor populations.
Demonstrated inhibition of proliferation in targeted areas.
Post-treatment analysis revealed insights into neurogenesis.
Potential implications for understanding brain physiology and behavior.

Conclusions

The technique allows for precise manipulation of neurogenesis in research.
Results contribute to the understanding of adult-born neuron functions.
Further studies can explore therapeutic applications in neurodegenerative diseases.

Frequently Asked Questions

What is the significance of adult neurogenesis?

Adult neurogenesis plays a vital role in learning, memory, and mood regulation.

How does ionizing radiation affect neurogenesis?

Ionizing radiation inhibits the proliferation of new neurons, impacting brain function.

What imaging technique is used in this study?

Computer tomography-guided three-dimensional imaging is utilized for precise targeting.

What are the potential applications of this research?

Understanding neurogenesis can lead to insights into brain health and therapies for neurodegenerative diseases.

How does this technique improve upon previous methods?

It allows for more accurate targeting of specific neural populations compared to traditional methods.

What are the next steps in this research?

Further studies will investigate the functional implications of manipulating neurogenesis.

La funzione dei neuroni di mammifero adulto-nato rimane un'area attiva di ricerca. Radiazioni ionizzanti inibisce la nascita di nuovi neuroni. Utilizzando la tomografia computerizzata guidata irradiazione focale (CFIR), tridimensionale anatomico di mira specifiche popolazioni progenitrici neurali può ora essere utilizzato per valutare il ruolo funzionale della neurogenesi adulta.

L'obiettivo generale di questa procedura è quello di descrivere una tecnica radiologica avanzata, che consente di eseguire l'irradiazione focale su piccoli modelli animali e successivamente inibire la proliferazione con risoluzione anatomica specifica. Ciò si ottiene impiegando prima l'imaging volumetrico tridimensionale guidato dalla tomografia computerizzata per la localizzazione della regione di interesse. La seconda fase della procedura consiste nel calcolare l'erogazione e la durata del trattamento radiologico nella regione di interesse.

Il terzo passo consiste nell'eseguire la calibrazione basata su pellicola per la dose di radiazioni. Il passaggio finale consiste nel determinare l'accuratezza del fascio di radiazioni mediante la visualizzazione diretta del fascio di radiazioni nel tessuto. In definitiva, i risultati di questi studi possono dimostrare il potenziale ruolo funzionale di popolazioni neuroprogenitrici proliferanti selezionate mediante analisi post-trattamento della fisiologia e del comportamento.

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