scholarly journals Role of recombination kinetics and grain size in radiation-induced amorphization

2012 ◽  
Vol 86 (21) ◽  
Author(s):  
Narasimhan Swaminathan ◽  
Dane Morgan ◽  
Izabela Szlufarska
Keyword(s):  
Grain Size ◽  
Radiation Induced ◽  
Recombination Kinetics

Histologic Findings of Choroidal Vasculopathy in Eyes Enucleated following Radiation Therapy for Uveal Melanoma: Radiation Choroidopathy

2021 ◽  
Author(s):  
Sean Platt ◽  
Diva R. Salomao ◽  
Jose Pulido
Keyword(s):  
Radiation Therapy ◽  
Uveal Melanoma ◽  
Malignant Tumors ◽  
Vitreous Hemorrhage ◽  
Radiation Retinopathy ◽  
Radiation Induced ◽  
Histopathologic Analysis ◽  
Choroidal Vessels ◽  
Choroidal Vasculopathy

Abstract Introduction Little has been published about the choroidal vascular changes that occur years after radiation exposure. The aim of this study was to review the histological changes observed in the choroidal vasculature following radiotherapy for uveal melanoma. Methods Records from a single institution were retrospectively reviewed from June 7, 2007 to June 7, 2017; 101 patients with a diagnosis of uveal melanoma that underwent enucleation had their records reviewed. Out of these, a total of 26 eyes had undergone plaque brachytherapy prior to enucleation, which had been performed at a mean time of 7.2 years (range from 0 years to 30 years) after the initial plaque placement. A histopathologic analysis was conducted on all 26 eyes with special emphasis on the choroidal changes. Of these 26 eyes, 18 demonstrated evidence of radiation-induced vasculopathy. Results Of the 18 eyes, 10/18 (55%) had radiation retinopathy and 16/18 (89%) had radiation choroidal vasculopathy. One patient had a phthisical eye, and the choroid could not be evaluated because the characteristics of the vasculature could not be determined. Nine cases had vitreous hemorrhage (50%), all cases had radiation retinopathy, and 8/9 (89%) had radiation choroidopathy. Of the 16 cases with radiation choroidal vasculopathy, 3/16 (19%) had only intratumoral radiation choroidal vasculopathy, 3/16 (19%) had only extratumoral radiation choroidal vasculopathy, and, thus, 10/16 (32%) had both intratumoral and extratumoral radiation choroidal vasculopathy. In patients with radiation choroidal vasculopathy, 2/16 (13%) had hyalinization of the choroidal vessels. Another 3/16 (19%) cases with radiation choroidal vasculopathy had ectatic vessels. The other 11/16 (68%) had evidence of both hyalinization of the choroidal vessels as well as ectatic vessels in the choroid. Histological evidence of radiation retinopathy and choroidopathy were seen in 69% of eyes enucleated after receiving radiation therapy, which, in some cases, also had vitreous hemorrhage. Polypoidal choroidal vasculopathy, choroidal neovascularization, and retinal choroidal anastomoses (RAP-type lesions) were seen in 12 of the 16 eyes (75%). Discussion/Conclusion Irradiation of malignant tumors of the eye causes not only radiation retinopathy but also radiation choroidopathy. The role of radiation choroidopathy in the subsequent visual loss following radiotherapy and the role of anti-VEGF therapy needs to be recognized and distinguished from radiation retinopathy. Our data adds to the prior limited knowledge that radiation affects the choroid and can induce specific phenotypes similar to the clinical spectrum of CNV, PCV, and RAP.

scholarly journals Space Radiation-Induced Alterations in the Hippocampal Ubiquitin-Proteome System

2021 ◽  
Vol 22 (14) ◽  
pp. 7713
Author(s):  
Alyssa Tidmore ◽  
Sucharita M. Dutta ◽  
Arriyam S. Fesshaye ◽  
William K. Russell ◽  
Vania D. Duncan ◽  
...  
Keyword(s):  
Spatial Memory ◽  
Memory Performance ◽  
Space Radiation ◽  
Label Free ◽  
Proteomic Profiling ◽  
Neurocognitive Deficits ◽  
Male Wistar Rats ◽  
Radiation Induced ◽  
Induced Changes

Exposure of rodents to <20 cGy Space Radiation (SR) impairs performance in several hippocampus-dependent cognitive tasks, including spatial memory. However, there is considerable inter-individual susceptibility to develop SR-induced spatial memory impairment. In this study, a robust label-free mass spectrometry (MS)-based unbiased proteomic profiling approach was used to characterize the composition of the hippocampal proteome in adult male Wistar rats exposed to 15 cGy of 1 GeV/n 48Ti and their sham counterparts. Unique protein signatures were identified in the hippocampal proteome of: (1) sham rats, (2) Ti-exposed rats, (3) Ti-exposed rats that had sham-like spatial memory performance, and (4) Ti-exposed rats that impaired spatial memory performance. Approximately 14% (159) of the proteins detected in hippocampal proteome of sham rats were not detected in the Ti-exposed rats. We explored the possibility that the loss of the Sham-only proteins may arise as a result of SR-induced changes in protein homeostasis. SR-exposure was associated with a switch towards increased pro-ubiquitination proteins from that seen in Sham. These data suggest that the role of the ubiquitin-proteome system as a determinant of SR-induced neurocognitive deficits needs to be more thoroughly investigated.

scholarly journals Correction to: The role of connexin proteins and their channels in radiation-induced atherosclerosis

2021 ◽  
Author(s):  
Raghda Ramadan ◽  
Sarah Baatout ◽  
An Aerts ◽  
Luc Leybaert
Keyword(s):  
Radiation Induced ◽  
Connexin Proteins

A correction to this paper has been published: https://doi.org/10.1007/s00018-021-03811-z

scholarly journals On the role of grain size on slurry erosion behavior of a novel medium-carbon, low-alloy pipeline steel after induction hardening

Wear ◽  
2021 ◽  
pp. 203678
Author(s):  
Vahid Javaheri ◽  
Oskari Haiko ◽  
Saeed Sadeghpour ◽  
Kati Valtonen ◽  
Jukka Kömi ◽  
...  
Keyword(s):  
Grain Size ◽  
Pipeline Steel ◽  
Induction Hardening ◽  
Slurry Erosion ◽  
Medium Carbon ◽  
Erosion Behavior

The role of melatonin on radiation-induced pneumonitis and lung fibrosis: A systematic review

Life Sciences ◽  
2021 ◽  
pp. 119721
Author(s):  
Sahar Sheikholeslami ◽  
Tayebeh Aryafar ◽  
Razzagh Abedi-Firouzjah ◽  
Amin Banaei ◽  
Masoumeh Dorri-Giv ◽  
...  
Keyword(s):  
Systematic Review ◽  
Lung Fibrosis ◽  
Radiation Induced

scholarly journals Mechanism of radiation-induced bystander effect: Role of the cyclooxygenase-2 signaling pathway

2005 ◽  
Vol 102 (41) ◽  
pp. 14641-14646 ◽  
Author(s):  
H. Zhou ◽  
V. N. Ivanov ◽  
J. Gillespie ◽  
C. R. Geard ◽  
S. A. Amundson ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Bystander Effect ◽  
Cyclooxygenase 2 ◽  
Radiation Induced ◽  
Radiation Induced Bystander Effect
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