Effects of Focal Radiation on [18F]-Fluoro-D-Glucose Positron Emission Tomography in the Brains of Miniature Pigs: Preliminary Findings on Local Metabolism

被引：11

作者：

Yeh, Chun-, I ^{[2
,3
,4
]}

Cheng, Mei-Fang ^{[5
]}

Xiao, Furen ^{[6
]}

Chen, Yi-Chieh ^{[5
]}

Liu, Chien-Chu ^{[5
]}

Chen, Hung-Yi ^{[6
]}

Yen, Ruoh-Fang ^{[5
]}

Ju, Yu-Ten ^{[7
]}

Chen, Yilin ^{[8
]}

Bodduluri, Mohan ^{[1
,9
]}

Yu, Pin-Huan ^{[8
]}

Chi, Chau-Hwa ^{[8
]}

Chong, Ngot Swan ^{[9
,10
]}

Wu, Liang-Hsiang ^{[1
,9
]}

Adler, John R., Jr. ^{[1
,9
,11
]}

Schneider, Michael Bret ^{[1
,11
,12
]}

机构：

[1] Zap Surg Syst Inc, San Carlos, CA 94070 USA

[2] Natl Taiwan Univ, Dept Psychol, Taipei, Taiwan

[3] Natl Taiwan Univ, Coll Med, Grad Inst Brain & Mind Sci, Taipei, Taiwan

[4] Natl Taiwan Univ, Neurobiol & Cognit Sci Ctr, Taipei, Taiwan

[5] Natl Taiwan Univ Hosp, Dept Nucl Med, Taipei, Taiwan

[6] Natl Taiwan Univ Hosp, Dept Surg, Taipei, Taiwan

[7] Natl Taiwan Univ, Dept Anim Sci & Technol, Taipei, Taiwan

[8] Natl Taiwan Univ, Sch Vet Med, Inst Vet Clin Sci, Taipei, Taiwan

[9] Zap Med Syst Inc, George Town, Cayman Islands

[10] Natl Yang Ming Univ, Dept Biomed Imaging & Radiol Sci, Taipei, Taiwan

[11] Stanford Univ, Dept Neurosurg, Stanford, CA 94305 USA

[12] Stanford Univ, Dept Psychiat & Behav Sci, Stanford, CA 94305 USA

来源：

NEUROMODULATION | 2021年 / 24卷 / 05期

关键词：

FDG-PET; MRI; stereotactic radiosurgery; TRIGEMINAL NEURALGIA; GLUCOSE-METABOLISM; IMAGING CHANGES; RADIOSURGERY; MODEL; PET; GAMMATHALAMOTOMY; EPILEPSY; SURGERY; ALTERS;

D O I：

10.1111/ner.13147

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

1001 ;

摘要：

Objectives It would be a medically important advance if durable and focal neuromodulation of the brain could be delivered noninvasively and without ablation. This ongoing study seeks to elucidate the effects of precisely delivered ionizing radiation upon focal brain metabolism and the corresponding cellular integrity at that target. We hypothesize that focally delivered ionizing radiation to the brain can yield focal metabolic changes without lesioning the brain in the process. Materials and Methods We used stereotactic radiosurgery to deliver doses from 10 Gy to 120 Gy to the left primary motor cortex (M1) of Lee Sung miniature pigs (n= 8). One additional animal served as a nonirradiated control. We used positron emission tomography-computed tomography (PET-CT) to quantify radiation dose-dependent effects by calculating the ratio of standard uptake values (SUV) of 2-deoxy-2-[F-18]-fluoro-D-glucose (F-18-FDG) between the radiated (left) and irradiated (right) hemispheres across nine months. Results We found that the FDG-PET SUV ratio at the targeted M1 was significantly lowered from the pre-radiation baseline measurements for animals receiving 60 Gy or higher, with the effect persisting at nine months after radiosurgery. Only at 120 Gy was a lesion suggesting ablation visible at the M1 target. Animals treated at 60-100 Gy showed a reduced signal in the absence of an identifiable lesion, a result consistent with the occurrence of neuromodulation. Conclusion Focal, noninvasive, and durable changes in brain activity can be induced without a magnetic resonance imaging (MRI)-visible lesion, a result that may be consistent with the occurrence of neuromodulation. This approach may provide new venues for the investigation of neuromodulatory treatments for disorders involving dysfunctional brain circuits. Postmortem pathological analysis is needed to elucidate whether there have been morphological changes not detected by MRI.

引用

页码：863 / 869

页数：7

共 37 条

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