Role of Pentoxifylline and Vitamin E in Attenuation of Radiation-Induced Fibrosis

2005 ◽  
Vol 39 (3) ◽  
pp. 516-522 ◽  
Author(s):  
Teresa B Chiao ◽  
Audrey J Lee
Keyword(s):  
Nervous System ◽  
Vitamin E ◽  
Radiation Injury ◽  
Soft Tissues ◽  
Antioxidant Properties ◽  
Data Sources ◽  
Data Synthesis ◽  
Modest Improvement ◽  
Radiation Induced

OBJECTIVE: To evaluate the use of pentoxifylline and vitamin E as monotherapy and in combination for the treatment of radiation-induced fibrosis (RIF). DATA SOURCES: Literature retrieval was performed through MEDLINE (1966–March 2004) using the terms vitamin E, α-tocopherol, pentoxifylline, radiation-induced fibrosis, and radiation injury. DATA SYNTHESIS: Few treatments exist for managing RIF of soft tissues. Due to its antioxidant properties, vitamin E may reduce the oxidative damage induced by radiation. The precise mechanism of action for pentoxifylline in management of RIF remains unclear. Uncontrolled studies evaluating vitamin E or pentoxifylline as monotherapy in RIF have shown modest improvement in clinical regression of fibrosis. However, controlled data are needed to verify these benefits. Studies involving pentoxifylline plus vitamin E demonstrated regression in RIF. The combination was more effective than placebo and may be superior to monotherapy with either agent. Adverse effects were rarely reported in the studies and consisted mainly of gastrointestinal and nervous system effects. CONCLUSIONS: Overall, pentoxifylline is well tolerated and is one of the few commercially available drugs with clinical data for management of RIF. Despite a lack of large, well-designed clinical trials, pentoxifylline plus vitamin E should be considered as an option in patients with symptomatic RIF.

Re-Examination of the Exacerbating Effect of Inflammasome Components during Radiation Injury

2021 ◽  
Author(s):  
W. June Brickey ◽  
Michael A. Thompson ◽  
Zhecheng Sheng ◽  
Zhiguo Li ◽  
Kouros Owzar ◽  
...  
Keyword(s):  
Cellular Response ◽  
Radiation Injury ◽  
Therapeutic Benefit ◽  
Acute Radiation ◽  
Cellular Damage ◽  
Inflammatory Factors ◽  
Experimental Conditions ◽  
Acute Radiation Injury ◽  
Radiation Induced

Radiation can be applied for therapeutic benefit against cancer or may result in devastating harm due to accidental or intentional release of nuclear energy. In all cases, radiation exposure causes molecular and cellular damage, resulting in the production of inflammatory factors and danger signals. Several classes of innate immune receptors sense the released damage associated molecules and activate cellular response pathways, including the induction of inflammasome signaling that impacts IL-1β/IL-18 maturation and cell death. A previous report indicated inflammasomes aggravate acute radiation syndrome. In contrast, here we find that inflammasome components do not exacerbate gamma-radiation-induced injury by examining heterozygous and gene-deletion littermate controls in addition to wild-type mice. Absence of some inflammasome genes, such as caspase-1/11 and Nlrp3, enhance susceptibility of treated mice to acute radiation injury, indicating importance of the inflammasome pathway in radioprotection. Surprisingly, we discover that the survival outcome may be sex-dependent as more inflammasome-deficient male mice are susceptible to radiation-induced injury. We discuss parameters that may influence the role of inflammasomes as radioprotective or radioexacerbating factors in recovery from radiation injury including the use of littermate controls, the sex of the animals, differences in microbiota within the colonies and other experimental conditions. Under the conditions tested, inflammasome components do not exacerbate radiation injury, but rather provide protective benefit.

Bismuth Subgallate–Epinephrine Paste in Adenotonsillectomies

2000 ◽  
Vol 34 (4) ◽  
pp. 522-525 ◽  
Author(s):  
Randy C Hatton
Keyword(s):  
Active Ingredient ◽  
Science Citation Index ◽  
Citation Index ◽  
Postoperative Bleeding ◽  
Data Sources ◽  
Data Synthesis ◽  
Search Terms ◽  
Bismuth Subgallate ◽  
Minimal Evidence

OBJECTIVE: To evaluate the role of bismuth subgallate–epinephrine (BSE) paste as a hemostatic in adenotonsillectomies. DATA SOURCES: MEDLINE (January 1966–October 1999) and Current Contents (January 1997–October 1999) were searched, using bismuth subgallate, adenoidectomy, tonsillectomy, and adenotonsillectomy as search terms. A citation search was performed using Science Citation Index (January 1977–October 1999). DATA SYNTHESIS: Adenotonsillectomies are common procedures; although there are few complications, hemorrhage is a concern. Bismuth subgallate has historically been used as an astringent and hemostatic. An evaluation of studies of bismuth subgallate and BSE paste was conducted. CONCLUSIONS: There is minimal evidence to support this practice, but data suggest that epinephrine may be the active ingredient in BSE paste. BSE paste is inexpensive, poses little risk, and may decrease postoperative bleeding; therefore, it may be a reasonable hemostatic agent.

Divalproex Sodium Therapy in Elderly with Dementia-Related Agitation

2002 ◽  
Vol 36 (10) ◽  
pp. 1625-1628 ◽  
Author(s):  
Crystal E Pratt ◽  
Steven M Davis
Keyword(s):  
Clinical Trials ◽  
Elderly Patients ◽  
Statistical Significance ◽  
Data Sources ◽  
Controlled Trials ◽  
Divalproex Sodium ◽  
Data Synthesis ◽  
Medline Search ◽  
Potential Benefits

OBJECTIVE: To review available literature regarding the use of divalproex sodium in the treatment of agitation in elderly patients with dementia. DATA SOURCES: Clinical trials and review articles were identified by MEDLINE search (1966 — March 2002). DATA SYNTHESIS: The literature provides information regarding the potential benefits and tolerability of divalproex sodium in the treatment of dementia-related agitation. This article analyzes 7 studies to better understand the role of divalproex sodium in the treatment of dementia. CONCLUSIONS: Divalproex sodium may offer a slight benefit to elderly patients suffering from dementia-related agitation. Until better-controlled trials demonstrate statistical significance and comparisons with established treatments are performed, practitioners should use divalproex sodium cautiously.

scholarly journals Nervous System and Tissue Polarity Dynamically Adapt to New Morphologies in Planaria

2019 ◽  
Author(s):  
Johanna Bischof ◽  
Margot E. Day ◽  
Kelsie A. Miller ◽  
Joshua LaPalme ◽  
Michael Levin
Keyword(s):  
Nervous System ◽  
Planar Cell Polarity ◽  
Tissue Level ◽  
The Body ◽  
Tissue Polarity ◽  
Intact Brain ◽  
Radiation Induced ◽  
The Central Nervous System ◽  
Primary Axis

AbstractThe coordination of tissue-level polarity with organism-level polarity is crucial in development, disease, and regeneration. Exploiting the flexibility of the body plan in regenerating planarians, we used mirror duplication of the primary axis to show how established tissue-level polarity adapts to new organism-level polarity. Tracking of cilia-driven flow to characterize planar cell polarity of the epithelium revealed a remarkable reorientation of tissue polarity in double-headed planarians. This reorientation is driven by signals produced by the intact brain and is not hampered by radiation-induced removal of stem cells. The nervous system itself adapts its polarity to match the new organismal anatomy in these animals as revealed by distinct regenerative outcomes driven by polarized nerve transport. Thus, signals from the central nervous system can dynamically control and re-orient tissue-level polarity to match the organism-level anatomical configuration, illustrating a novel role of the nervous system in the regulation of patterning.

Pseudoneoplasms of the Nervous System

2010 ◽  
Vol 134 (3) ◽  
pp. 404-416
Author(s):  
Kliment Donev ◽  
Bernd W. Scheithauer
Keyword(s):  
Nervous System ◽  
Differential Diagnosis ◽  
Clinical Picture ◽  
Correct Diagnosis ◽  
Molecular Genetic ◽  
Data Sources ◽  
Pertinent Literature ◽  
Presenting Symptoms ◽  
Radiation Induced ◽  
Physical Findings

Abstract Context.—Pseudoneoplasms of the nervous system vary greatly in nature. Ranging from inflammatory to autoimmune, infectious, malformative, reactive, degenerative, and radiation induced, they all mimic true tumors. Thus, they have the potential to mislead clinicians, radiologists, and pathologists alike. Their clinical and/or neuroimaging and histologic features are readily misinterpreted as tumor. Knowledge of the pitfalls is essential to avoid mismanagement, specifically overtreatment. In such instances, pathologists must take the entire clinical picture into consideration, acquainting themselves with presenting symptoms, physical findings, and neuroimaging. Objective.—To present 10 examples of pseudoneoplasms of the nervous system, analyze the basis for their mimicry, and discuss their differential diagnosis. Data Sources.—Review of the pertinent literature related to pseudoneoplasms of the nervous system and review of the consultation files of one of the authors (B.W.S.). Conclusions.—The identification of tumor mimics may be difficult under the best of circumstances, and maintaining a broad differential diagnosis as well as application of a variety of immunocytochemical and occasionally ultrastructural and/or molecular genetic methods is essential to arrive at a correct diagnosis.

scholarly journals Preclinical Research into Basic Mechanisms of Radiation-Induced Heart Disease

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
M. Boerma ◽  
M. Hauer-Jensen
Keyword(s):  
Heart Disease ◽  
Side Effect ◽  
Radiation Injury ◽  
Renin Angiotensin System ◽  
Severe Side Effect ◽  
Preclinical Research ◽  
Angiotensin System ◽  
Chest Wall Tumors ◽  
Radiation Induced

Radiation-induced heart disease (RIHD) is a potentially severe side effect of radiotherapy of thoracic and chest wall tumors if all or part of the heart was included in the radiation field. RIHD presents clinically several years after irradiation and manifestations include accelerated atherosclerosis, pericardial and myocardial fibrosis, conduction abnormalities, and injury to cardiac valves. There is no method to prevent or reverse these injuries when the heart is exposed to ionizing radiation. This paper presents an overview of recent studies that address the role of microvascular injury, endothelial dysfunction, mast cells, and the renin angiotensin system in animal models of cardiac radiation injury. These insights into the basic mechanisms of RIHD may lead to the identification of targets for intervention in this late radiotherapy side effect.

scholarly journals DETERMINATION OF OXYGEN PERFUSION IN THE AREA OF RADIATION-INDUCED FIBROSIS OF THE SKIN IN PATIENTS WITH BREAST CANCER AND ITS ROLE IN PATHOGENESIS OF LATE RADIATION INJURY

2018 ◽  
Vol 40 (3) ◽  
pp. 235-238 ◽  
Author(s):  
T T Agishev ◽  
E E Topuzov ◽  
D A Кrasnozhon ◽  
A O Petrachkov ◽  
R V Pavlov ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Oxygen Pressure ◽  
Radiation Injury ◽  
Soft Tissues ◽  
Partial Oxygen Pressure ◽  
Healthy Tissue ◽  
Significant Difference ◽  
Radiation Induced ◽  
Oxygen Perfusion ◽  
Partial Oxygen

Aim: Late radiation injury in the form of radiation-induced fibrosis (RIF) is one of the many complications of radiation therapy. The aim was to evaluate oxygen perfusion in the skin in the area of late radiation injury manifested as RIF in patients with breast cancer. Materials and Methods: Based on our first-hand experience in treating late radiation injures of soft tissues in patients with breast cancer, we measured oxygen perfusion of the skin (tсрО2) in the area of late radiation injury using a transcutaneous monitor (oximeter) TCM 400 (Radiometer, Denmark). Results: Partial oxygen pressure tcpO2 in the RIF area in patients with breast cancer didn’t show any significant decrease compared to healthy tissue. Mean value of partial oxygen pressure tcpO2 in the RIF area was 42.650 ± 9.178 mmHg, in the healthy tissue it was 45.180 ± 8.025 mmHg. Maximal difference in tcpO2 between the damaged and healthy tissue was 30 mmHg. Conclusions: Results of the study suggest that there’s no significant difference between oxygen perfusion (tcpO2) in the area of RIF and healthy tissue.

scholarly journals The Role of Vitamin E in Slowing Down Mild Cognitive Impairment: A Narrative Review

Healthcare ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1573
Author(s):  
Ram Lakhan ◽  
Manoj Sharma ◽  
Kavita Batra ◽  
Frazier B. Beatty
Keyword(s):  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Vitamin E ◽  
Neuroprotective Effect ◽  
Evaluation Studies ◽  
Grey Literature ◽  
Antioxidant Properties ◽  
Health Concern ◽  
Slowing Down

With the aging population, dementia emerges as a public health concern. In 2012, the Health and Retirement Study found that 8.8% of adults over 65 years suffered from dementia. The etiopathogenesis and treatment of dementia are not well understood. Antioxidant properties of Vitamin E and its major elements tocopherols and tocotrienols have been reported to be effective in slowing down the progression of dementia from its initial stage of Mild cognitive impairment (MCI). Therefore, the current review aims to explore the role of vitamin E on MCI. A literature search using the key words “Vitamin E, tocopherols, tocotrienols, and mild cognitive impairment” was conducted in MEDLINE (PubMed), CINAHL, and Google Scholar. The inclusion criteria were: (1) articles published in the past ten years; (2) published in English language; (3) published in peer-reviewed journals; and (4) descriptive and epidemiological or evaluation studies. Articles published prior to 2010, focused on other forms of dementia than MCI, grey literature and non-peer-reviewed articles were excluded. A total of 22 studies were included in the narrative synthesis. The results were equivocal. Eleven studies showed some level of the neuroprotective effect of Vitamin E, tocopherols and tocotrienols on the progression of MCI. The mixed results of this review suggest further exploration of the possible protective effects of Vitamin E on the development of dementia. Future studies can be conducted to decipher antioxidant properties of vitamin E and its association with slowing down the cognitive decline.

scholarly journals Role of Vitamin E and the Orexin System in Neuroprotection

2021 ◽  
Vol 11 (8) ◽  
pp. 1098
Author(s):  
Maria Ester La Torre ◽  
Ines Villano ◽  
Marcellino Monda ◽  
Antonietta Messina ◽  
Giuseppe Cibelli ◽  
...  
Keyword(s):  
Vitamin E ◽  
Neurodegenerative Diseases ◽  
Antioxidant Properties ◽  
Phenotypic Change ◽  
The Central Nervous System ◽  
Specific Receptors

Microglia are the first line of defense at the level of the central nervous system (CNS). Phenotypic change in microglia can be regulated by various factors, including the orexin system. Neuroinflammation is an inflammatory process mediated by cytokines, by the lack of interaction of specific receptors such as the OX2-OX2R complex, caused by systemic tissue damage or, more often, associated with direct damage to the CNS. Chronic activation of microglia could lead to long-term neurodegenerative diseases. This review aims to explore how tocopherol (vitamin E) and the orexin system may play a role in the prevention and treatment of microglia inflammation and, consequently, in neurodegenerative diseases thanks to its antioxidant properties. The results of animal and in vitro studies provide evidence to support the use of tocopherol for a reduction in microglia inflammation as well as a greater activation of the orexinergic system. Although there is much in vivo and in vitro evidence of vitamin E antioxidant and protective abilities, there are still conflicting results for its use as a treatment for neurodegenerative diseases that speculate that vitamin E, under certain conditions or genetic predispositions, can be pro-oxidant and harmful.

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