abstract：:Cancer cells proliferate and metastasize against the body's defense mechanisms due to their ability to change in response to challenges, both from the body's internal defenses as well as those from external sources, such as radiation and chemotherapy. This ability of tumor cell populations to change and grow in respon...

journal_title：Medical hypotheses

authors： Pienta KJ,Ward WS

更新日期：1994-01-01 00:00:00

abstract：:The etiology of intra-abdominal adhesions is explained by hydrolysis of the peritoneal phospholipid layer caused by phospholipase A2 activity. This view could unify the pre-existing hypotheses that intra-abdominal adhesions are due to ischemia or increased plasminogen activator activity. New therapeutic approaches are...

journal_title：Medical hypotheses

authors： Snoj M

更新日期：1993-12-01 00:00:00

abstract：:An immune modulation complex is proposed which recognizes and is driven by an MHC presented epitope of the CD4 molecule present on the surface of up regulated CD4+ lymphocytes. Immune modulation is affected by both CD4 lymphocyte destruction and impairment of their potential for immune recognition. These two processes...

journal_title：Medical hypotheses

authors： Kennedy JR

更新日期：1993-11-01 00:00:00

abstract：:The etiology of most kinds of dementia is still obscure and is probably multifactorial. We query whether excessive watching of television may contribute to the development of dementive processes for the following reasons: TV spectators are exposed to a mass of successive and rapid stimuli with little or no possibility...

journal_title：Medical hypotheses

authors： Aronson M

更新日期：1993-11-01 00:00:00

abstract：:This article proposes a series of experiments to determine if cows and sheep could be used as animal models for HIV-1, the AIDS virus. To justify this effort, a substantial case is presented that HIV-1 is a natural recombinant of Bovine Leukemia Virus (BLV) and Visna Virus. This natural recombinant may have been inadv...

journal_title：Medical hypotheses

authors： Siefkes D

更新日期：1993-10-01 00:00:00

abstract：:The clinical syndrome of hypoxic ischemic encephalopathy (HIE) which occurs in association with birth asphyxia, is thought to represent a reperfusion injury consequent upon the generation of cytotoxic oxygen derived free radicals. It has recently been suggested that resuscitation of asphyxiated infants with unrestrict...

journal_title：Medical hypotheses

authors： Ballot DE,Rothberg AD,Davies VA,Smith J,Kirsten G

更新日期：1993-10-01 00:00:00

abstract：:So-called 'limited life span' of diploid cells does not depend on their unresponsiveness to growth factors from the data obtained by complete protein-free culture of tumor cells. Limited proliferation (called limited life span) of diploid cells is one of the 'ad-hoc' negative regulatory mechanisms in animals, and can ...

journal_title：Medical hypotheses

authors： Chigira M,Watanabe H

更新日期：1993-10-01 00:00:00

abstract：:Late luteal phase dysphoric disorder is described as a classic biopsychosocial disorder resulting from complex interactions of biological, psychological, socioeconomic and cultural forces on women. To understand women suffering from the disorder, one must understand how the genetically designed female brain and body i...

journal_title：Medical hypotheses

authors： Severino SK

更新日期：1993-09-01 00:00:00

abstract：:Pseudohypoaldosteronism Type I may occur due to several different causes. The authors recommend distinguishing between effector and receptor disorders with regard to the diverse mode of inheritance and prognosis. ...

journal_title：Medical hypotheses

authors： Bayer M,Kutílek S

更新日期：1993-09-01 00:00:00

abstract：:A neural network approach to modeling the development of personality traits through social learning is presented. From the more general model the special case of a network mapping four situation dimensions (input neurons) into seven dimensional personality traits (output neurons) is described. This network is allowed ...

journal_title：Medical hypotheses

authors： Gonzalez-Heydrich J

更新日期：1993-08-01 00:00:00

abstract：:Superficial fraying, splitting and fibrillation of articular cartilage as a consequence of ageing or mechanical injury is not always associated with joint pain. However, similar cartilage lesions accompanied by synovitis and engorgement of the subchondral vasculature generally is; the disorder being known as osteoarth...

journal_title：Medical hypotheses

authors： Ghosh P,Smith M

更新日期：1993-08-01 00:00:00

abstract：:The mechanism of dermatomyositis/polymyositis (DM/PM) is unknown. There are multiple probable trigger mechanisms. Internal malignancy is a specific trigger for some cases of DM/PM. It is known that there are marked changes in the extracellular matrix around tumors and that various fractions of depolymerized glycosamin...

journal_title：Medical hypotheses

authors： Stone OJ

更新日期：1993-07-01 00:00:00

abstract：:S-allylgutimine has immunostimulant and tumor cell inhibitory activities. This complex action may be a result of the stimulation of IL-2 production. The effectiveness of immunotherapy depends on the uncoupling of IL-2 downregulation. This principle can be widely used with those immunological diseases where IL-2 level ...

journal_title：Medical hypotheses

authors： Vértesi C

更新日期：1993-06-01 00:00:00

abstract：:The levator ani muscles in women are overloaded by constant supporting abdominal contents, and counteracting rises of abdominal pressure at the level of the urethra. The excessive load leads to a decrease in their type II fibers. This results in stress urinary incontinence due to loss of the fibers responsible for add...

journal_title：Medical hypotheses

authors： Jóźwik M

更新日期：1993-06-01 00:00:00

abstract：:A search for control mechanisms involving embryonic genes is explored reviewing a variety of subject areas including, a) the methylation status of DNA and the globin gene, b) ethionine and steroid effects on expression of embryonic genes, c) alpha-fetoprotein gene activity induced by carcinogens and in hepatomas. Also...

journal_title：Medical hypotheses

authors： Hancock RL

更新日期：1993-05-01 00:00:00

abstract：:Abnormal fluctuations of acetylcholine and serotonin might cause, or be correlated with, a variety of symptoms. This communication cites evidence which suggests that fluctuations of serotonin might have a causative role in migraine, mania, and depression and that fluctuations of acetylcholine might have a causative ro...

journal_title：Medical hypotheses

authors： Brown DW

更新日期：1993-05-01 00:00:00

abstract：:Goldberger discovered human pellagra was a non-infectious disease, affecting mostly the small and the timid in overcrowded institutions. Symptoms were diarrhoea, dermatitis and dementia. The staff and older children escaped the disease. They ate the meat and left the small and timid with the gravy. The 'Goldberger syn...

journal_title：Medical hypotheses

authors： Reid G

更新日期：1993-05-01 00:00:00

abstract：:Amyloid beta-protein is a major focus in efforts to understand the etiology of Alzheimer disease yet there is little known about the mechanism of its deposition in plaques. I propose deposition of amyloid in neuritic plaques depends on the remains of neurofibrillary tangles after neuronal death. The interaction of the...

journal_title：Medical hypotheses

authors： Perry G

更新日期：1993-04-01 00:00:00

abstract：:Currently, several prominent researchers are investigating the role of reactive oxygen and free radicals in the activation of latent HIV in infected individuals. Early clinical applications of free radical scavengers and plant-based antioxidant systems have shown promise of efficacy in altering this process. This manu...

journal_title：Medical hypotheses

authors： Greenspan HC

更新日期：1993-02-01 00:00:00

abstract：:For diagnosis of Human Immunodeficiency Virus (HIV) infection by the recently developed Polymerase Chain Reaction (PCR), the two commonly used clinical samples are either the peripheral blood monocytes (PBMC) or the plasma of the infected individuals. In the former instance, DNA is extracted from PBMC. The integrated ...

journal_title：Medical hypotheses

authors： Nandi J,Banerjee K

更新日期：1993-01-01 00:00:00

abstract：:Three important issues must be addressed in any attempt to determine whether combination painkillers play a role in analgesic nephropathy. The first issue, namely that of a causal link between the combination itself and nephrotoxicity, has never been adequately documented. On the contrary, there is much evidence that ...

journal_title：Medical hypotheses

authors： Driesens F,Awouters F,Goossens T,Janssen P

更新日期：1993-01-01 00:00:00

abstract：:The malignant cell, in vivo, metabolizes and respires anaerobically. For a good many years scientists have been aware of anaerobia being present in malignant growths. The prevailing opinion is that the malignant cell is able to remain viable in an anaerobic medium. This assumption is incorrect and is actually misleadi...

journal_title：Medical hypotheses

authors： White MW

更新日期：1992-12-01 00:00:00

abstract：:The human placenta contains a significant amount of histamine, a potent vasoconstrictor of the placental vasculature, shown by the author to be stored within the tissues' mast cells. The proposed hypothesis suggests that placental mast cells may have an important role in normal and, or pathological processes during pr...

journal_title：Medical hypotheses

authors： Purcell WM

更新日期：1992-11-01 00:00:00

abstract：:A role for lipopolysaccharides (endotoxins, LPS) in 7 the pathogenesis of Reye's syndrome (RS) has previously been suggested. Impairment of hepatic LPS clearance can lead to systemic endotoxemia as previous studies by this and other laboratories have suggested for several hepatic disorders including RS. Systemic LPS m...

journal_title：Medical hypotheses

authors： Treon SP,Broitman SA

更新日期：1992-11-01 00:00:00

abstract：:Dietary animal fat increases the risk of colorectal cancer. A factor in the increased risk is hypothesised to result from the inhibition of isoforms of a colonic epithelial cell enzyme that detoxifies genotoxins, glutathione S-transferase, by one of the major secondary bile acids produced in the colon by fat digestion...

journal_title：Medical hypotheses

authors： Schneider H

更新日期：1992-10-01 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

authors： Kantha SS

更新日期：1992-10-01 00:00:00

abstract：:Structures which morphologically resemble treponemes have been found in material from patients suffering from latent or late latent syphilis, many of whom have received treatment in the past. These structures were also found in the blood or spinal fluid (SF) of asymptomatic patients with both positive and negative ser...

journal_title：Medical hypotheses

authors： Ghinsberg RC,Nitzan Y

更新日期：1992-09-01 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

authors： Das UN

更新日期：1992-09-01 00:00:00

abstract：:Can consciousness be understood as the ongoing active creation of information (of meaning)? 'Emergence', the central concept in this hypothesis, plays an essentially different role in it than in theories previously proposed. ...

journal_title：Medical hypotheses

authors： Atkin A

更新日期：1992-08-01 00:00:00

abstract：:Through the analysis of accumulated experimental data of cell growth, a model of unrestricted cell growth is presented here. This model is based hypothetically on the cellular commitment to senescence as in the previously presented commitment theory. Cells are divided into 3 types, namely uncommitted cells, committed ...

journal_title：Medical hypotheses

authors： Tsuboi K,Hatabu H,Lee K,Nio Y,Tobe T,Hatanaka M

更新日期：1992-08-01 00:00:00

abstract：:The incidence of breast cancer in women has increased dramatically over the last decade. Epidemiological markers of this increased incidence include: endocrine related phenomena (early menarche, age of first parity and age of menopause); exposure of the breast to X-radiation; and a group of seemingly disparate factors...

journal_title：Medical hypotheses

authors： Morris JJ,Seifter E

更新日期：1992-07-01 00:00:00

abstract：:Numerous studies implicate cellular immunological effector systems in the partial containment of virus replication during the early stages of HIV infection. Immunostimulatory therapeutic regimes designed to enhance virus clearance are therefore theoretically attractive, but are accompanied by the risk of concomitant a...

journal_title：Medical hypotheses

authors： Wrightham MN,Cann AJ,Sewell HF

更新日期：1992-07-01 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

authors： Prioreschi P

更新日期：1992-06-01 00:00:00

abstract：:It is proposed that gastrin promotes the uptake of divalent and trivalent metal ions from the gastrointestinal lumen by catalyzing the binding of metal ions to luminal albumin and transferrin respectively. The following observations are consistent with this hypothesis: 1. Gastrin binds both divalent and trivalent meta...

journal_title：Medical hypotheses

authors： Baldwin GS

更新日期：1992-05-01 00:00:00

abstract：:In a previous paper we predicted that health effects of dietary fats in humans would require half a century or more to be understood, instead of the decade or so predicted during 1956 by an Editorial in The Lancet. It would seem that our prediction may have been optimistic since it has now been reported that trans uns...

journal_title：Medical hypotheses

authors： Booyens J,van der Merwe CF

更新日期：1992-04-01 00:00:00

abstract：:An association between Alzheimer's Disease (AD) and low CSF and serum vitamin B12 (B12) has recently been described (1, 2, 3). This is apparently independent of nutritional intake (4). It has been suggested that such patients may exhibit an atypical form of cobalamin deficiency (3, 4). It is therefore proposed that th...

journal_title：Medical hypotheses

authors： McCaddon A,Kelly CL

更新日期：1992-03-01 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

authors： Bülow N

更新日期：1992-02-01 00:00:00

abstract：:The dissimilarities in spin-lattice relaxation time (T1) of water proton from one tumor to the other is due to the yield of hypoxic fraction in the tumor. The yield of higher relaxation time (T1) in the KHT tumor compared to the RIF-1 tumor as a function of growth is due to the hypoxic fraction of the tumor. The hypox...

journal_title：Medical hypotheses

authors： Akber SF

更新日期：1992-01-01 00:00:00

abstract：:Ampligen, a mismatched double stranded RNA, is hypothesized to be an ideal base therapy for HIV disease to which other agents, such as the nucleoside analogue, AZT, can be advantageously added. The unique properties of Ampligen which support this hypothesis include activation of immune cells, inhibition of virus repli...

journal_title：Medical hypotheses

authors： Gillespie D,Carter WA

更新日期：1992-01-01 00:00:00

abstract：:Chronic adult periodontitis (CAP) is a common disease of the supporting tissues of teeth, and is a major cause of tooth loss. This disease is distinguished from more rare rapidly progressing forms of periodontitis, in which a variety of neutrophilic polymorphonuclear leukocyte (PMN) defects have been identified. PMN d...

journal_title：Medical hypotheses

authors： Zoellner H,Hunter N

更新日期：1991-12-01 00:00:00