Abstract：
:A hypothesis is suggested, which emphasizes the role in carcinogenesis of the attack on low molecular nucleophilic substances (LMN) by electrophilic agents - chemical carcinogens, phisical factors, and antitumor alkylating agents. The significance of the degree of nucleophilicity (electronic charge, order of bonds, index of valence) as a locus minoris resistentiae of the LMN in the electrophilic attack on the latter is emphasized as well as the probable role of the hydrogenated pteridines in influencing carcinogenesis by means of ascorbate, tocopherol, SH-containing compounds etc. In support of this hypothesis the preference of electrophilic agents (derivatives of nitrogen mustard and nitrosoureas) for the places with highest degree of nucleophilicity as targets, in experiments in vitro with nucleic bases and pteridines is emphasized.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Raikov ZD,Christova-Georgieva NI,Raikova ETdoi
10.1016/0306-9877(87)90003-xsubject
Has Abstractpub_date
1987-01-01 00:00:00pages
15-22issue
1eissn
0306-9877issn
1532-2777pii
0306-9877(87)90003-Xjournal_volume
22pub_type
杂志文章abstract：:Dental implants have been widely used in clinic for the restoration of lost teeth in recent decades, but there still remains a great challenge for even a higher success rate and a shorter rehabilitation time. The osseointegration between dental implant and alveolar bone tissue is crucial for a successful implantation....
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.05.013
更新日期：2008-10-01 00:00:00
abstract：:Periodontitis significantly decreases survival in hemodialysed patients with end stage renal disease (ESRD). Periodontitis-related microorganisms spreading into the bloodstream are thought to impair blood rheological parameters - for example, increasing whole blood viscosity, aggregating blood elements, and decreasing...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.04.053
更新日期：2010-02-01 00:00:00
abstract：:Alzheimer's disease (AD) may be related to nutritional deficiencies from exocrine pancreatic insufficiency (EPI) with mal-absorption of essential nutrients, vitamins and minerals. EPI occurs in about twenty percent of the elderly population, sometimes without obvious symptoms, a number similar to the incidence of AD. ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2017.03.020
更新日期：2017-05-01 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：:Many clinical trials have clearly demonstrated the benefit of statins in the prevention of coronary heart disease. Although other effects have subsequently been described, the so-called pleiotropic effects of statins, there is a tendency to relate all those effects, more or less directly, to inhibition of 3-hydroxy-3-...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.02.046
更新日期：2006-01-01 00:00:00
abstract：:Complex spinal reconstructive procedures are invariably associated with excessive intraoperative blood loss that significantly increases the risk of severe perioperative complications. In some cases, excessive hemorrhage is equivalent to estimated total blood volume. Unfortunately, widely exposed bony surfaces are not...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.02.012
更新日期：2005-01-01 00:00:00
abstract：:Epidemiological studies highlight the negative correlation between vitamin D levels and the incidence of many non-skeletal diseases including inflammatory diseases, cancer, and metabolic and neurological disorders. However, most randomized controlled trials (RCTs) with oral vitamin D supplementation give mixed results...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109417
更新日期：2020-01-01 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：:Cytokines and their effects are widely studied in immunology, but the cellular mechanisms responsible for producing these substances are not yet described or proven. Antigen presenting cells (APCs), macrophages and dendritic cells are suitable subjects for such a study. One of the many papers illustrating the interpla...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.1997.0720
更新日期：1999-08-01 00:00:00
abstract：:A major factor relating to the oversight of neurological dysfunction and seizures caused by magnesium (Mg++) depletion, involves the buffer functions of the skeletal system orchestrated primarily by the parathyroid. A Mg++ depleted subject may appear relatively asymptomatic until a short period after homeostatic respo...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(91)90067-9
更新日期：1991-01-01 00:00:00
abstract：:Insufficient attention has been given to reports in the literature describing patients with symptomatic migraine who, in addition to, or instead of, the well-recognized zones of hypofusion, have zones of hyperperfusion, which can be interpreted as hypermetabolism due to neuronal activation. A new neural theory of migr...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2000.1214
更新日期：2001-03-01 00:00:00
abstract：:Close similarities in the courses of multiple sclerosis and schizophrenia laid the theoretical ground for attempting to find a common infectious aetiology for the two diseases. Chlamydia pneumoniae, which belongs to the rickettsial family of microorganisms has been linked to both diseases. It is postulated that since ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.11.045
更新日期：2009-06-01 00:00:00
abstract：:Virulence factors are microbial products that are known to be harmful to the host and may assist in the pathogenesis of the micro-organism. Superantigens, including those produced by bacteria and viruses, clearly act as virulence factors. The clinical effects of superantigens can be not only acute but also chronic and...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(97)90315-7
更新日期：1997-03-01 00:00:00
abstract：:Although membrane sphingomyelin (SPH) serves as the precursor for many signaling molecules, its presence in large amounts, and its specific localization in the outer monolayer of the plasma membrane suggest that it may have a cytoprotective function. We propose that SPH helps maintain the integrity of the plasma membr...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2001.1336
更新日期：2001-08-01 00:00:00
abstract：:Seizure (ictal) behavior in humans has been observed and recorded since ancient times. A satisfactory solution to this vexing problem continues to elude medical science. Antiepileptic drug (AED) therapy fails to control seizures in 20% of patients with primary generalized epilepsy and 35% of patients with partial epil...
journal_title：Medical hypotheses
pub_type： 历史文章,杂志文章
doi：10.1016/s0306-9877(02)00348-1
更新日期：2003-01-01 00:00:00
abstract：:This novel, iso-osmo-resistive theory offers electro-resistivity of food components as a new dimension for digestion. Firstly, fats, carbohydrates and proteins differ markedly in their resistivity, which offers a way to monitor them, especially when digestive enzymes cause consistent and distinctive changes. Secondly ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109282
更新日期：2019-09-01 00:00:00
abstract：:Cancer is the second cause of death worldwide, but current therapies are often insufficient or linked with toxicity. Initial evidence in scientific literature seems to support the role of non-pharmacological strategies, including hypoglycemia, in cancer treatment. The biological rationale for hypoglycemia-based treatm...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109276
更新日期：2019-09-01 00:00:00
abstract：:Interferon-alpha (IFN) is widely used in the treatment of certain cancers and viral infections, including hepatitis C (HCV). Unfortunately, depression is a common side effect of IFN therapy, affecting approximately a third of HCV patients receiving IFN therapy. Studies have shown that selective serotonin reuptake inhi...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.01.026
更新日期：2005-01-01 00:00:00
abstract：:It has long been recognized that the symptom complex of fibromyalgia can be seen with hypothyroidism. Hypothyroidism may been categorized, like diabetes, into type I (hormone deficient) and type II (hormone resistant). Most cases of fibromyalgia fall into the latter category. The syndrome is reversible with treatment,...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(02)00294-3
更新日期：2003-08-01 00:00:00
abstract：:Focal segmental glomerulosclerosis (FSGS) is a common cause of nephrotic disease in adults, and it is thought to be increasing in incidence. FSGS is often difficult to treat and even has a high propensity to relapse after transplant. Indeed, this suggests that there might be some circulating factor responsible for pro...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2001.1438
更新日期：2001-12-01 00:00:00
abstract：UNLABELLED:One plausible explanation for the controversy that surrounds the causes and clinical management of obesity is the notion that overeating and obesity may only be a couple of "symptoms" associated with a yet to be discovered medical disorder. OBJECTIVES:To introduce the Salted Food Addition Hypothesis. This t...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.06.049
更新日期：2009-12-01 00:00:00
abstract：:Endemic cancer of the oesophagus in Africa is associated with the use of maize as the staple. In one African community endemic cancer of the oesophagus has been shown to have a strong statistical association with the consumption of foods based on maize in the meal form. A strong association with consumption of maize m...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.05.037
更新日期：2006-01-01 00:00:00
abstract：:This paper treats evidence for an increasing recognition of a force with intangible properties in biosystems with special reference to its ability to transport electrons at near 0 degree Kelvin. It is implied that such force, whose demonstration at these temperatures is an experimental contrivance to emphasise its str...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(95)90517-0
更新日期：1995-06-01 00:00:00
abstract：:Cardiovascular diseases like myocardial infarction, complex congenital heart disease, and subsequent heart failure are a leading cause of morbidity and mortality. Recent advances in tissue engineering arise to address the lack of available tissues and organs for transplantation because cells alone are not capable of r...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.04.065
更新日期：2006-01-01 00:00:00
abstract：BACKGROUND:The hypotheses of autoimmune, allergic or infectious etiology of severe mental illness have been reported in the scientific literature repeatedly. The main objective of this work is to study the relationship of inflammatory, autoimmunity or recent infection markers with the fact of suffering Severe Mental Di...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109279
更新日期：2019-09-01 00:00:00
abstract：:ATP sensitive (K(+)(ATP)) potassium cardiac channels are recruited when ATP levels are low as in ischemic injury and acute trauma. Such activation results in ECG-ST elevation and cardiac arrhythmias. K(+)(ATP) channel recruitment may be blocked by the sulfonylurea glibenclamide, permitting a wide variety of animal exp...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(03)00055-0
更新日期：2003-04-01 00:00:00
abstract：:Treatment with non-selective beta-blockers has been proposed to have an indirect antiviral activity acting via an enhanced performance of the immune system, and the mechanism of this activity has been laid out earlier. Experimental and clinical findings are presented that corroborate the hypothesis that inhibiting the...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2004.06.030
更新日期：2005-01-01 00:00:00
abstract：:Atherosclerosis and its fatal complications, such as myocardial infarction or stroke, represent the most common cause of morbidity or mortality in modern world. It was observed that an excess of reactive oxygen species (ROS) accompanies atherosclerosis. Under physiological circumstances, intracellular H+ accumulates a...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.109724
更新日期：2020-08-01 00:00:00
abstract：:This hypothesis clearly proposes the true and previously undiscovered cause of male homosexuality or bisexuality and in most cases the predictability in infancy of the development of this sexuality in adulthood. It is based on compelling new evidence which has accumulated over many years. The fetal and neonatal period...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.06.006
更新日期：2016-09-01 00:00:00
abstract：:In literature, the cerebellum is given a substantial role in cognitive processes, in addition to traditional views on cerebellar function of regulating motor behaviour. The phenomenon of cerebellar damage causing impairments in memory and executive functioning was observed in various cerebellar disorders. Cerebellar c...
journal_title：Medical hypotheses
pub_type： 杂志文章,评审
doi：10.1016/j.mehy.2010.02.035
更新日期：2010-08-01 00:00:00
