Abstract：
:Homocysteinemia, first identified as a genetic disease in children in the 1960s, is associated with severe widespread atherosclerosis which causes death (in untreated cases) before the age of 10 years. Elevated blood homocysteine is now recognized as a risk factor for heart disease in the general population. The mechanism by which homocysteine induces atherosclerosis is still unknown despite intensive investigation. It is proposed here that the mechanism involves sulfane sulfur formed in the catabolism of homocysteine. This unstable and reactive form of sulfur is formed through the action of several enzymes which are known to use homocysteine, its disulfide (homocystine), or its mixed disulfide with cysteine as substrates. Sulfane sulfur has physiological effects which are consistent with a role in atherogenesis. At very low concentrations, it induces proliferation of many cell types, an effect which is consistent with the fibrosis and hyperplasia, which are prominent features of atherosclerotic lesions. At higher concentrations, it is toxic. Also, it modulates the activity of many enzymes and, through this effect on enzymes of lipid metabolism, it could be responsible for the lipid accumulation seen in atherosclerotic lesions.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Toohey JIdoi
10.1054/mehy.2000.1209keywords:
subject
Has Abstractpub_date
2001-02-01 00:00:00pages
259-61issue
2eissn
0306-9877issn
1532-2777pii
S0306-9877(00)91209-Xjournal_volume
56pub_type
杂志文章abstract：:Secretion of ovarian hormones directly into the peritoneal cavity has been repeatedly demonstrated for 25 years, but the consequences of this pathway of secretion have not been fully considered. Circumstantial evidence suggests the following hypotheses: (1) Hormones enter the endometrial cavity through the tubes and i...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(03)00029-x
更新日期：2003-06-01 00:00:00
abstract：:For American medical historiography, to borrow from Dickens, these are the best of times and the worst of times. These are the times when rigorous scholarship has been brought to bear on the field (with great improvement in the quality of research) and when medicine is disappearing from its own history. These are the ...
journal_title：Medical hypotheses
pub_type： 历史文章,杂志文章
doi：10.1016/0306-9877(92)90079-r
更新日期：1992-06-01 00:00:00
abstract：:The recent unprecedented increase of childhood obesity has led to an alarming rise in type 2 diabetes mellitus (T2D) among these children. The process underlying the progression from simple obesity to T2D is not well understood. Cortisol is a candidate factor in the pathogenesis of T2D, as it can exacerbate insulin re...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.04.020
更新日期：2008-09-01 00:00:00
abstract：:Exercise induced bronchospasm (EIB) affects approximately 10% of normal individuals with higher prevalence rates among children, obese adults, and competitive athletes. Although hyperpnea with dry air is the best known cause, the problem is multifactorial with atopy, asthma and chlorine all playing established roles. ...
journal_title：Medical hypotheses
pub_type： 杂志文章,评审
doi：10.1016/j.mehy.2015.08.014
更新日期：2015-11-01 00:00:00
abstract：:Transcendental mediation (TM) is a stylized form of physical and mental relaxation which is associated with changes in the secretion and release of several pituitary hormones. The hormonal changes induced by TM mimic the effects of the inhibitory neurotransmitter gamma aminobutyric acid (GABA). It is hypothesized that...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(95)90181-7
更新日期：1995-04-01 00:00:00
abstract：:The existence of homosexuality in humans poses a problem for evolutionary theory. Exclusive male homosexuality has a catastrophic effect on reproduction and yet inherited factors appear to contribute to it. Previous attempts to resolve this conundrum are inconsistent with aspects of evolutionary theory. Additional lim...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(02)00363-8
更新日期：2003-02-01 00:00:00
abstract：:Being born in the winter and spring significantly increases one's risk for developing schizophrenia. This birth seasonality may account for as many as 10% of all cases of schizophrenia. Maternal third trimester infections or vitamin D deficiencies are hypothesized to be the most likely cause and can account for many o...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2011.02.019
更新日期：2011-06-01 00:00:00
abstract：:The prevailing view of lung cancer is multi-step progression of normal cells into cancer cells through gain of function oncogenes coupled with loss of tumor suppressor genes. This progression of genetic damage ultimately results in the hallmarks of cancer. This theory has strong support from studies finding genetic da...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.12.050
更新日期：2006-01-01 00:00:00
abstract：:Curvilinear distraction is currently under investigation to reconstruct curved maxillofacial bone defects. However, previous studies have revealed the discrepancy between the contour of the regenerated bone in the distraction gap and the curvilinear pathway of the transport disc. We hypothesize that the discrepancy is...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.06.011
更新日期：2012-10-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.09.033
更新日期：2018-12-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.11.007
更新日期：2013-02-01 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
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.109925
更新日期：2020-11-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2010.11.018
更新日期：2011-03-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2004.10.018
更新日期：2005-01-01 00:00:00
abstract：:Personality trait research has shown associations with many genes, prominently those of the catecholamine metabolism such as dopamine beta hydroxylase (DBH), catechol-O-methyltransferase (COMT), and monoamine oxidase A (MAOA). Because DBH gene is in linkage disequilibrium with ABO gene, there is reason to think that o...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2011.04.039
更新日期：2011-08-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.07.024
更新日期：2012-11-01 00:00:00
abstract：:No single dietary factor or ingested substance has been implicated in the aetiology of oesophageal carcinoma especially in high-risk areas of the world. Although not well defined, there is heavy consumption of tannin-rich foods, particularly sorghum, by populations at high risk for carcinoma. The carcinogenic properti...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(88)90060-6
更新日期：1988-06-01 00:00:00
abstract：:The measurement of urinary neopterin and biopterin may be an important non-specific diagnostic tool. Urinary biopterin has been found to be decreased in parkinsonian patients, and in hyperphenylalanemia as a variant of phenylketonuria. Urinary neopterin has been found to be elevated in numerous conditions. It has been...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(89)90105-9
更新日期：1989-08-01 00:00:00
abstract：:The hypothesis is put forward that coronary heart disease (CHD) arises from a chronic imbalance between anabolism and catabolism in the body, induced by the psychosocial environment and mediated through the central nervous system (CNS) and neuroendocrine system. Psychosocial demands increase periods of waking arousal ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(83)90044-0
更新日期：1983-11-01 00:00:00
abstract：:Parkinson disease (PD) is a chronic progressive degenerative disorder that affects over 6 million people worldwide. It is manifested by motor and psychiatric signs. The latter inflicts up to 88% of PD patients. With the prolongation of life expectancy, it is presumed that the prevalence of PD will further rise, togeth...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2010.07.024
更新日期：2010-12-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.10.043
更新日期：2010-04-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2004.09.029
更新日期：2005-01-01 00:00:00
abstract：BACKGROUND:There is widespread loss of acetylcholine and other neurotransmitters in Alzheimer's disease and vascular dementia. It has generally been assumed that death of neurons causes neurotransmitter loss, but alternatively neurotransmitter depletion itself may at least contribute to neurodegeneration. PRESENTATION...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.02.043
更新日期：2006-01-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.08.043
更新日期：2010-02-01 00:00:00
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journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109427
更新日期：2020-01-01 00:00:00
abstract：:In light of the progressive, pubertal increases in serum gonadotropin (FSH, LH) levels coinciding with the peak incidence of simple goiters; the common alpha subunits associated with the gonadotropins, TSH and hCG; the ability of LH and hCG to bind to thyroid TSH receptors and affect thyroid function; and, the probabl...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(83)90003-8
更新日期：1983-04-01 00:00:00
abstract：:The first conjugate vaccine was approved for use in the US in 1988 to protect infants and young children against the capsular bacteria Haemophilus influenzae type b (Hib). Since its introduction in the US, this vaccine has been approved in most developed countries, including Denmark and Israel where the vaccine was ad...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2011.08.019
更新日期：2011-12-01 00:00:00
abstract：:Alcoholism is a major and world-wide health problem. A characteristic pattern of congenital defects, known as the fetal alcohol syndrome, has been detected in the offspring of mothers who are chronic alcoholics. The mechanism underlying the teratogenic effects of ethanol is not known. An important hypothesis is that e...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(91)90185-2
更新日期：1991-02-01 00:00:00
abstract：:The resonator theory claims that light scattering by the melanin granules of the retinal pigment epithelium causes light to be reflected back through the outer segment of the cones, in a direction opposite that of the incident light. These two opposite directed wave motions may produce standing waves inside the cone o...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(92)90046-f
更新日期：1992-02-01 00:00:00
