Abstract：
:Electron spin resonance (ESR) spin trapping methodology has been used to study the reactions of manganese dusts with glutathione, employing alpha-(4-pyridyl-1-oxide)-N-tert-butyl-nitrone (PBN) and 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as spin traps. The results show evidence for the glutathionyl radical formation in the reactions of both MnO2 and manganese (III) acetate with glutathione. Based on these experimental observations, we hypothesise that the mechanism of neurotoxic effects of manganese might be due to the fact that the generation of glutathionyl radicals depletes the glutathione pool and reduces the glutathione shield against free radical products of dopamine metabolism and manganese induced reactive oxygenated species.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Shi XL,Dalal NSdoi
10.1016/0306-9877(90)90184-gsubject
Has Abstractpub_date
1990-10-01 00:00:00pages
83-7issue
2eissn
0306-9877issn
1532-2777pii
0306-9877(90)90184-Gjournal_volume
33pub_type
杂志文章abstract：:Damaged DNA can lead to aneuploidy and/or chromosomal instability, which is believed to be major contributor to tumor progression. Genotoxic and oncogenic stresses-induced DNA damage activate the tumor suppressor pathways initiate DNA damage response (DDR). One of the cellular fates in response to DDR is permanent gro...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2010.01.001
更新日期：2010-06-01 00:00:00
abstract：BACKGROUND:Bipolar disorder (BD) is characterized by recurrent episodes of mood dysregulations and depression is considered as the most frequent form of relapse. However, there is some evidence that in tropical countries, the course might be different with fewer depressive episodes. This study aims to examine the frequ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.06.017
更新日期：2014-09-01 00:00:00
abstract：:The objective of this study was to test the hypothesis that the regular practice of mindfulness meditation is associated with increased physiological levels of melatonin. Melatonin may be related to a variety of biologic functions important in maintaining health and preventing disease, including breast and prostate ca...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(95)90299-6
更新日期：1995-01-01 00:00:00
abstract：:In elderly, the fractures in C1-C2 are a common entity. Poor bone quality and wide range of motion hamper the natural bone fusion, thus making surgery often the only possible way to deal with the underlying pathology. The proximity to important neurovascular structures represents the stabilization in this segment a ch...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.109641
更新日期：2020-02-21 00:00:00
abstract：:The disturbances of the 11p15.5 chromosomal region are associated with Beckwith-Wiedemann syndrome, Russell-Silver syndrome, Wilms tumor, IMAGe syndrome, and idiopathic hemihyperplasia. The aim of this research was to examine the hypothesis that 11p15.5 initially became unstable in the European population about 200 ye...
journal_title：Medical hypotheses
pub_type： 历史文章,杂志文章
doi：10.1016/j.mehy.2018.09.008
更新日期：2018-12-01 00:00:00
abstract：:The 2013 American Heart Association Blood Cholesterol Guidelines increased the number of patients recommended for statin therapy in the United States to 56million. Two common statin side effects are muscle pain, referred to as "statin-associated muscle symptoms", and increased risk for new onset type-2-diabetes mellit...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2017.07.007
更新日期：2017-09-01 00:00:00
abstract：:In a survey based on the biographical sketches, obituary notes and eulogies of notable scientists, eight were identified as belonging to an elite group, having authored more than 1000 research publications, which include books, monographs and patents. They were, in chronological order, Thomas Alva Edison, Paul Karrer,...
journal_title：Medical hypotheses
pub_type： 历史文章,杂志文章
doi：10.1016/0306-9877(92)90179-g
更新日期：1992-10-01 00:00:00
abstract：:This article reviews the biochemical and physiological observations underpinning the synergism between ghrelin and ghrelin agonists with exercise, especially progressive resistance training that has been shown to increase muscle mass. The synergy of ghrelin agonists and physical exercise could be beneficial in conditi...
journal_title：Medical hypotheses
pub_type： 杂志文章,评审
doi：10.1016/j.mehy.2015.09.008
更新日期：2015-12-01 00:00:00
abstract：:Cachexia is a pathological state characterized by weight loss and protein mobilization during various diseases. Nutritional supplementation or appetite stimulants are unable to restore the loss of lean body mass. Agents interfering with TNF-alpha have not been very successful to date. Only eicosapentaenoic acid was ab...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2007.11.007
更新日期：2008-01-01 00:00:00
abstract：:The incidence rate of cutaneous melanoma has been increasing faster than that of any other cancer in white-skinned populations over the past decades. The main risk factors for melanoma (i.e. exposure to sunlight, naevus count, phototype, and family history of melanoma) may not wholly explain the epidemiological trends...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2010.03.010
更新日期：2010-09-01 00:00:00
abstract：:As known, gamma-interferon-induced cell death in HeLa cells can be mediated via the recently identified protein kinase, death associated protein (DAP) kinase which is localized to the microfilament system of the cytoskeleton. However, the downstream or upstream effectors of DAP kinase remain uncertain. In the present ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.1999.0967
更新日期：2000-05-01 00:00:00
abstract：:Bone grafting uses a wide range of materials derived mainly from exogenous sources. Autogenous teeth are often used fresh or fixed with alcohol for later use. Proposed here is a method of using cryogenically preserved autogenous extracted teeth, which could be macerated after thawing. This method avoids the possibilit...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.04.028
更新日期：2016-07-01 00:00:00
abstract：:Preeclampsia (PE) and gestational diabetes mellitus (GDM) are two of the most common medical complications of pregnancy, with risks for both mother and child. Like many other antepartum complications, PE and GDM occur only in pregnancy. However, it is not clear if pregnancy itself is the cause of these complications o...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.04.019
更新日期：2012-07-01 00:00:00
abstract：:Individuals with Down syndrome (DS) not only have increased risk of hypothyroidism, they also tend to develop a relatively novel mild form of neonatal hypothyroidism. One problem that may predispose those with trisomy 21 to hypothyroidism is the overexpression of the gene DYRK1A, which may have an affect on the thyroi...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2007.01.068
更新日期：2007-01-01 00:00:00
abstract：:Following allegations that Hepatitis B vaccination causes or triggers multiple sclerosis (MS), several epidemiological studies have been conducted to evaluate the association between MS and vaccination. In one study conducted in the US, a significant protective effect on the development of MS was observed for tetanus ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.05.009
更新日期：2005-01-01 00:00:00
abstract：:Silicone may, like any other adjuvant, induce an inflammatory reaction and diseases. There is no data about its use in renal transplant recipients. Increased immunogenicity of silicon may manifest by activation of both the innate and the adaptive immune system cells what promotes a chronic pro-inflammatory response. D...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.12.012
更新日期：2019-02-01 00:00:00
abstract：:It is suggested here that a Hemoglobin S (HbS)-mediated membrane oxidant injury is responsible for both the protection from malaria infection in the heterozygous sickle cell state, and for a critical pathologic process in homozygous sickle cell disease. This suggestion is arrived at by applying to the HbS condition th...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(87)90135-6
更新日期：1984-07-01 00:00:00
abstract：:A primary goal in antimicrobial drug design is to find molecules which inhibit key proteins in bacteria without affecting mammalian homologues. To this aim, structural differences between eukaryotic and prokaryotic enzyme proteins involved in life processes are widely exploited. The membrane-bound enzyme complex ATP s...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.05.004
更新日期：2014-08-01 00:00:00
abstract：:Intrauterine Contraceptive Devices with multifaceted application potential is a need of an hour. Although, copper-based IUDs exert an effective contraceptive as well as anticancer effects in a long-term basis, but also results in multiple complications. In this regard, RISUG® a polymer based contraceptive device has b...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.02.026
更新日期：2019-03-01 00:00:00
abstract：HYPOTHESIS:The delayed lung damage after SARS-CoV-2 infection may be caused by an autoimmune response to ACE2 induced by forced presentation of the ACE2 protein in a complex with CoV Spike in Fc Receptor positive Antigen Presenting Cells in the lung. The likelihood that this hypothesis is valid is low, but it is easily...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.110043
更新日期：2020-11-01 00:00:00
abstract：:There is no secret that despite the rapid development of new methods of cancer therapy, we still are not able to completely destroy the tumor. Every time we attack the tumor, the tumor neutralizes our attempts. Carcinogenesis can be presented as a tree whose branches are different pro-tumor mechanisms and whose trunk ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109545
更新日期：2020-04-01 00:00:00
abstract：:Gender differences in stem cell population have recently been identified. Blood and tissue samples from women showed consistent elevation of hematopoietic stem cell populations, mesenchymal stem cell populations and endothelial progenitor cells compared to men of similar ages. We and others have shown an increase in h...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.06.029
更新日期：2012-10-01 00:00:00
abstract：:In attempts to develop a rational anticancer strategy the same homologous tissue in 3 conditions were used side by side as targets: normal epidermis of the mouse back. Tween 60R-provoked benign epidermal hyperplasia, and carcinogen-provoked malignant condition. In contrast to the highest tolerated doses of the cytosta...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(82)90116-5
更新日期：1982-03-01 00:00:00
abstract：:Arthritis is inflammation in a joint often with joint damage, usually accompanied by pain, swelling and stiffness, resulting from infection, trauma, degenerative changes, metabolic disturbances, autoimmune or other causes. It occurs in various forms, including rheumatoid arthritis, osteoarthritis, bacterial arthritis ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.06.021
更新日期：2005-01-01 00:00:00
abstract：:Except for a few diseases of molecular mimicry such as rheumatic fever, post-streptococcal glomerulonephritis in children, and gluten-sensitive enteropathy, the cause of autoimmune diseases is unknown. Most autoimmune diseases are remitting-relapsing and the pathophysiology of either the initial attack or subsequent r...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.01.015
更新日期：2013-05-01 00:00:00
abstract：:Recent studies suggest that blood-borne metabolites of gut microbiota, such as trimethylamine N-oxide (TMAO) are involved in the aetiology of cardiovascular diseases and may serve as markers of cardiovascular risk. To enter the bloodstream the microbiota-derived molecules need to pass the gut-blood barrier (GBB). The ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.11.012
更新日期：2017-01-01 00:00:00
abstract：:Characteristics of malignant tumors, including anaerobic metabolism and metastases to lung, liver, bone and brain, may permit the enhanced survival of edited parts of the genome during periods of rapid environmental change. Carcinogenesis may be partially analogous to fossilization. ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(89)90150-3
更新日期：1989-01-01 00:00:00
abstract：:Prion protein, known as Prp(c), is a GPI-anchored membrane bound glycoprotein ubiquitously expressed in the body. To date, the precise nature of its physiological role remains a mystery. The prion protein's presence on neurons and immune effector cells suggests a dual neurological and immunological function. Some cons...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.02.038
更新日期：2005-01-01 00:00:00
abstract：:Class II malocclusion is one of the most common orthodontic problems. The main aetiology of Class II malocclusion is mandibular retrognathia. A variety of functional appliances have been used to stimulate mandibular growth in adolescence, however, the effects remain unsatisfactory. Therefore, new approaches are in nee...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.08.029
更新日期：2009-03-01 00:00:00
abstract：:Autism is a pervasive developmental disorder that is characterized by the behavioral traits of impaired social cognition and communication, and repetitive and/or obsessive behavior and interests. Although there are many theories and speculations about the pathogenetic causes of autism, the disruption of the serotonerg...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.01.002
更新日期：2013-04-01 00:00:00
