Abstract:
:Evidence is reviewed supporting a hypothesis of an anticarcinogenic effect of magnesium. Animal studies reported increased cancer in rodents maintained on magnesium deficient diets and a preventive effect for rodents fed excess levels of magnesium. Epidemiologic evidence is presented that magnesium levels in water, food, and air are inversely related to cancer mortality. Magnesium may also have a role in the reduced cancer mortality experienced by people living at high altitudes. Two biologically plausible mechanisms are considered by which magnesium could prevent carcinogenesis. Intracellular magnesium may enhance the fidelity of DNA replication or magnesium on the cell membrane may prevent changes which trigger the carcinogenic process.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Blondell JMdoi
10.1016/0306-9877(80)90010-9subject
Has Abstractpub_date
1980-08-01 00:00:00pages
863-71issue
8eissn
0306-9877issn
1532-2777pii
0306-9877(80)90010-9journal_volume
6pub_type
杂志文章abstract::Excessive milk consumption may adversely affect the circulation on account of the high calcium content of milk and because lactose promotes the intestinal absorption of calcium. Excessive calcium intake may cause calcification and rigidification of the large elastic arteries, which could be an important factor in caus...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.1999.0992
更新日期:2000-05-01 00:00:00
abstract::Aspirin, today, is an established drug in the regime for the prevention of myocardial infarction, especially in high-risk groups. This use of aspirin has given it a new lease of life in its tenth decade of clinical use. Aspirin is probably the oldest synthetic drug in the Pharmacopoeias today; thus one would have imag...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(95)90073-x
更新日期:1995-02-01 00:00:00
abstract::Cancer stem cells are presently viewed as carriers of the growth initiating potential, repopulation capability and drug resistance in tumors. However, many of these fundamental properties of cancer are host-related, modified by cell-cell interactions and/or dependent on angiogenesis. Indeed, it is well established tha...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2005.09.004
更新日期:2006-01-01 00:00:00
abstract::The assessment of nature and the extent of extraocular muscle injuries during initial visit in ocular emergencies is of paramount importance to avoid/minimize the subsequent need for strabismus surgery. Based on our experience in managing acute globe and orbital injuries and cases of strabismus, we propose the probabl...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2019.01.011
更新日期:2019-02-01 00:00:00
abstract::We developed a new hypothesis claiming that natriuresis of fasting is not only caused by diminished insulin resistance and hyperinsulinaemia with the subsequent reduction of renal sodium retention but it can also be attributed to the function of the leptin-NPY system. Each element of this concept has been substantiate...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.2000.1176
更新日期:2001-05-01 00:00:00
abstract::Oesophageal carcinoma is a devastating disease with a poor prognosis. This hypothesis shows how prostaglandin E2 exerts carcinogenic effects in the oesophagus. The contribution of prostaglandin E2 is related to other factors that predispose to oesophageal carcinoma. The implication of the hypothesis is that nonsteroid...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/s0306-9877(97)90285-1
更新日期:1997-02-01 00:00:00
abstract::Individuals with Down syndrome have signs of possible brain damage prior to birth. In addition to slowed and reduced mental development, they are much more likely to have cognitive deterioration and develop dementia at an earlier age than individuals without Down syndrome. Some of the cognitive impairments are likely ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2004.08.020
更新日期:2005-01-01 00:00:00
abstract::Myeloid-derived suppressor cells (MDSCs) accumulate in tumor-bearing hosts and play an essential role in tumor-associated immunosuppression, which hampers effective immunotherapeutic approaches. MicroRNAs (miRNAs) are short noncoding RNAs that negatively regulate target gene expression at the posttranscriptional level...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2014.05.006
更新日期:2014-08-01 00:00:00
abstract::Analysis of the age distribution of cancers of the uterus reveals three clearly distinctive types: early- and late-onset cancers of the cervix and one form of cancer of the corpus. England and Wales mortality data are available for the three types combined from 1911; cancers of the cervix and corpus have been listed s...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(86)90086-1
更新日期:1986-05-01 00:00:00
abstract::Relapse to cocaine, heroin, and alcohol is a common occurrence in ex-abusers of these substances. Although there are many potential causes for relapse, we postulate that one cause in some people may be re-exposure in an anesthesia setting to a drug similar to the formerly abused drug. We hypothesize, for example, that...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.1999.0797
更新日期:1999-12-01 00:00:00
abstract::There is growing dissatisfaction regarding the available diagnostic systems for psychiatric disorders (DSM, ICD). Psychiatrists acknowledge that though mental disease reflects brain disorders, the descriptive and symptom based nature of psychiatric diagnosis bears no relation to brain functions. According to Helmut's ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2004.02.010
更新日期:2004-01-01 00:00:00
abstract::Sepsis is a life-threatening disease requiring rapid diagnosis and treatment. Steroid hormones (e.g., estradiol, dehydroepiandosterone) have been suggested to reduce the hyper-inflammatory response of the immune system and to improve outcome in sepsis. We hypothesize that the impact of steroid hormones on the metaboli...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2012.05.025
更新日期:2012-09-01 00:00:00
abstract::Melanoma is one of the most aggressive cancers which has very low response rate and survival rate. Melanoma cells are known to be inherently resistant to the chemotherapy which results in poor outcomes and even failure of the therapy. For this reason, a better understanding of underlying mechanism of melanoma pathogen...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2018.05.002
更新日期:2018-07-01 00:00:00
abstract::Dysbiosis is a prominent feature of inflammatory bowel diseases (IBD). However, the efficacy of using antibiotics aiming at the aberrant gut microflora for IBD treatment are either unsuccessful or not persistent. In contrast, long-term oral vancomycin has been proved effective in controlling both the bile duct and gut...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2020.110211
更新日期:2020-11-01 00:00:00
abstract::Recent articles about the roles and relationships of tissue inhibitor of metalloproteinase-1 and transforming growth factor-beta 1 in various types of normal tissues and malignancies give rise to the question: 'Is there a relationship between them with regard to malignant melanoma progression?' In the light of many re...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.2001.1270
更新日期:2001-08-01 00:00:00
abstract::The largely empirical dopamine theory has limited value in clarifying the pathogenesis of schizophrenia, due to its inability to explain consistent imaging findings, such as cortical grey matter loss, reduced frontal and thalamic activity, and, reduced D1 receptor load. Furthermore, the most effective drug for treatin...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2005.06.022
更新日期:2005-01-01 00:00:00
abstract::This study investigated whether or not the anesthetic effect of ketamine in rats is dependent on adrenal gland hormones. The study was performed on two main rat groups, intact and adrenalectomized. Rat were divided into subgroups and given appropriate doses of ketamine, metyrapone or metyrosine. Durations of anesthesi...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2014.03.033
更新日期:2014-07-01 00:00:00
abstract::We argue that our common diseases should not necessarily be taken as a sign of physiological error. Regulatory networks developed by evolutionary forces to support reproductive fitness happen to include disease as a side-effect. For example, inflammatory and autoimmune diseases are secondary to a strong defence agains...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2013.06.030
更新日期:2013-10-01 00:00:00
abstract::Advances in human genome analyses have not yet allowed identification of specific genetic mechanisms underlying the expression of human neurobehavioural disorders. There is an increasing awareness that several genes may contribute to behavioural phenotypes and these genes appear to interact in as yet undetermined ways...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2005.06.032
更新日期:2006-01-01 00:00:00
abstract::The efficiency of anti-tumour drug strongly depends on its dose. Higher drug doses and exposure times usually result in better treatment. It is why the implementation of high-dose treatment is always attractive. However, most of the drug delivery techniques meet essential limitations. In isolated regional perfusion a ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2017.05.025
更新日期:2017-07-01 00:00:00
abstract::Most of the body iron is found within hemoglobin in red cells (the erythron), a smaller amount being distributed in other tissues such as muscles and in deposits. Iron homeostasis is a finely tuned process in which the most important regulators are probably the liver-derived hepcidin which blocks iron absorption and d...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2014.09.008
更新日期:2014-11-01 00:00:00
abstract::Spontaneous acute occlusion of the coronary artery produces regional myocardial ischemia and infarction. This coronary occlusion could be due to rapid progression of atherosclerosis or vasospasm. The factors that can precipitate an acute attack of myocardial infarction or coronary spasm are not known. It is proposed t...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(92)90147-5
更新日期:1992-09-01 00:00:00
abstract::Over-proliferation of SMC (smooth muscle cell) is one characteristics of atherosclerosis. One well accepted mechanism is that the decrease of ECs (endothelial cells) induced by over apoptosis leads to endothelial dysfunction, which in turn results in over-proliferation of SMC. Obviously, the mechanism works after endo...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2006.07.037
更新日期:2007-01-01 00:00:00
abstract::COVID-19 exacts a disproportionate toll on both the elderly and those with diabetes; these patients are more likely to require costly intensive care, longer hospitalisation, and die from complications. Nations would thus find it extremely difficult to either lift or sustain socially, economically, and politically dama...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2020.110374
更新日期:2021-01-01 00:00:00
abstract::Since 1960, the incidence of melanoma has increased dramatically in Caucasians worldwide, and during the past decade has risen at a rate of 6% a year in the USA. A hypothesis regarding this increased incidence suggests that the prevalent use of antibacterial soaps that contain photosensitizing compounds may be a risk ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.1997.0718
更新日期:1999-07-01 00:00:00
abstract::The paper discusses a mechanism for reciprocal translocation of midsegments between two chromatids so that one of the segments is restacked in inverted configuration. Regarding malignant cells, such process could derive from anachronistic assembly of the nuclear envelope. ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/s0306-9877(98)90277-8
更新日期:1998-06-01 00:00:00
abstract::Ligaments are generally viewed as passive structural elements. Virtually all treatments for torn ligaments are based upon a structural paradigm. However, there is considerable evidence to suggest that ligaments function as neural sensors to facilitate supportive reflex contractions of muscles. It is hypothesized that ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(89)90106-0
更新日期:1989-08-01 00:00:00
abstract::Pellagra is a curable dietary illness that unchecked leads to dementia, diarrhoea, dermatitis and death due to lack of the precursors for NAD(H). In addition it caused a wide range of monosyndromic degenerative and functional neurological disorders as well as profound developmental, premature aging and metabolic syndr...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2007.01.029
更新日期:2007-01-01 00:00:00
abstract::IGF-I acts on vascular endothelium to activate nitric oxide synthase, thereby promoting vascular health; there is reason to believe that this protection is especially crucial to the cerebral vasculature, helping to ward off thrombotic strokes. IGF-I may also promote the structural integrity of cerebral arteries, there...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/s0306-9877(02)00241-4
更新日期:2003-09-01 00:00:00
abstract::The prevalence of adult and childhood obesity are increasing. Most of the human newborn's body fat accumulates in the last half of intrauterine life. Fat in the fetus was thought to be mostly synthesized from glucose, but now it is commonly accepted that the bulk of it is the product of placental transfer of maternal ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2018.10.022
更新日期:2019-01-01 00:00:00