Abstract：
:Incretin hormones have trophic effects on beta cell function that can aid prevention and treatment of diabetes. cAMP is the primary mediator of these effects, and has been shown to potentiate glucose-stimulated insulin secretion, promote proper beta cells differentiation by increasing expression of the crucial transcription factor PDX-1, and prevent beta cell apoptosis. cGMP's role in beta cell function has received far less scrutiny, but there is emerging evidence that it may have a trophic impact on beta cell function analogous to that of cAMP. An increase in plasma glucose boosts beta cell production of cGMP, which acts as a feed-forward mediator to enhance glucose-stimulated insulin secretion. cGMP also has an anti-apoptotic effect in beta cells, and there is now indirect evidence that it promotes expression of PDX-1. Supraphysiological concentrations of biotin can directly activate guanylate cyclase, and there is limited evidence that high intakes of this vitamin can be therapeutically beneficial in diabetics and in rodent models of diabetes. Beneficial effects of cGMP on muscle insulin sensitivity and on control of hepatic glucose output may contribute to biotin's utility in diabetes. The fact that nitric oxide/cGMP exert a range of favorable effects on vascular health should further encourage exploration of biotin's preventive and therapeutic potential. If an appropriate high-dose biotin regimen could achieve a modest systemic increase in guanylate cyclase activity, without entailing unacceptable side effects or risks, such a regimen might have considerable potential for promoting vascular health and preventing or managing diabetes.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
McCarty MFdoi
10.1016/j.mehy.2004.04.031keywords:
subject
Has Abstractpub_date
2006-01-01 00:00:00pages
323-8issue
2eissn
0306-9877issn
1532-2777pii
S0306-9877(05)00486-Xjournal_volume
66pub_type
杂志文章abstract：BACKGROUND:Huachansu, a Chinese medicine that comes from dried toad venom from the skin glands of Bufo bufo gargarizans Cantor or Bufo melanostictus Schneider, has been used in treatment of cancers. We conducted a meta-analysis to evaluate the efficacy and safety of Huachansu combined with chemotherapy for advanced gas...
journal_title：Medical hypotheses
pub_type： 杂志文章,meta分析
doi：10.1016/j.mehy.2013.04.038
更新日期：2013-08-01 00:00:00
abstract：:In this work we propose a simple mathematical model for the analysis of the impact of control measures against an emerging infection, namely, the severe acute respiratory syndrome (SARS). The model provides a testable hypothesis by considering a dynamical equation for the contact parameter, which drops exponentially w...
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：:Deciding for an amputation in case of complex regional pain syndrome type I (CRPS-I) is controversial. Evidence for favorable or adverse effects of an amputation is weak. We therefore follow a careful and well-structured decision making process. After referral of the patient with the request to amputate the affected l...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.08.026
更新日期：2018-12-01 00:00:00
abstract：BACKGROUND:Eelier studies demonstrated the up-regulation of some transcriptional factors such as Oct4, Nanog, Sox2 in undifferentiated cancer cells. These transcriptional regulators are up-regulated in pluripotent cells, as well and are responsible for cell reprogramming in normal cells. It might be said that normal ce...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.09.014
更新日期：2014-12-01 00:00:00
abstract：:Numerous studies indicate that aberrant amyloid precursor protein metabolism, elevated peroxidative damage, depressed energy metabolism and altered calcium homeostasis are four pivotal deleterious factors in the pathogenesis of Alzheimer's disease. Cumulative evidence further suggests that these four factors are intim...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(96)90021-3
更新日期：1996-05-01 00:00:00
abstract：:Interventions focusing on the prevention and treatment of chronic non-communicable diseases are on rise. In the current article, we propose that dysfunction of the mesocortico-limbic reward system contributes to the emergence of the WHO-identified risk behaviors (tobacco use, unhealthy diet, physical inactivity and ha...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.02.020
更新日期：2016-05-01 00:00:00
abstract：:The hypothesis is proposed that: 1. Aflatoxin B1 and polycyclic hydrocarbon carcinogens bind to the regions of DNA to which steroid hormones bind and cause the deletion of genes in these regions. 2. The deletion of these genes may be responsible for a reduced number of ribosomes bound to the endoplasmic reticulum. 3. ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(77)90063-9
更新日期：1977-07-01 00:00:00
abstract：:High doses of oestrogens in the dog and ferret cause myeloid hyperplasia in the bone marrow superseded by hypoplasia affecting all cell lines. In the peripheral blood after an initial leucocytosis, there is thrombocytopenia, anaemia and leucopenia. These effects, which are ultimately lethal, do not occur in cats, rats...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(85)90070-2
更新日期：1985-02-01 00:00:00
abstract：:Knowledge about how information is stored in neurons of animals and in the human brain is still incomplete. A hypothesis related to long-term changes in synaptic efficiency has strong experimental support, but does not seem to be able to explain all observations. It has recently been proposed that magnetite together w...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.07.003
更新日期：2018-10-01 00:00:00
abstract：:The article introduces the hypothesis that aquaporin 1 of intramuscular capillary endothelial cells may enhance the capability of the skeletal myofiber regeneration. Evidence for the hypothesis is based on the indication obtained from our previous muscle xenograft study into athymic nude mice, and the indications prop...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.07.056
更新日期：2007-01-01 00:00:00
abstract：:Oral water irrigation devices (WIDs) are widely used for oral physiotherapy in homes and dental clinics throughout the world. A major area of concern in the use of WIDs has been the possibility of injury to the sulcular epithelium and underlying tissue. There are several documented clinical cases of tissue injury with...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(85)90110-0
更新日期：1985-12-01 00:00:00
abstract：:Many theories try to explain the existence and function of paranasal sinuses. This paper is an attempt to correlate process of paranasal sinus development in human with bone pneumatization processes in animals. It is here proposed that this mechanism starts in utero and continues after birth. During endochondral devel...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2003.12.028
更新日期：2004-01-01 00:00:00
abstract：:The water proton spin lattice relaxation time of normal and tumorous tissues of human and radiosensitivity yield a linear relationship. ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(95)90507-3
更新日期：1995-06-01 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：:Contralateral central nervous control may be an evolutionary consequence of dependence on the image-forming eye, especially in large organisms. As a result of the topological transformation of the visual stimulus in the pupillary eye, the external environmental hemispace impinges directly upon the contralateral intern...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(95)90225-2
更新日期：1995-11-01 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
abstract：:Alzheimer's disease (AD) a neurodegenerative disorder of widely distributed cortical networks evolves over years while A beta (Aβ) oligomer neurotoxicity occurs within seconds to minutes. This disparity combined with disappointing outcomes of anti-amyloid clinical trials challenges the centrality of Aβ as principal me...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.10.013
更新日期：2014-12-01 00:00:00
abstract：:The role of ozone on earth is controversial, as in the stratosphere it is protective against excessive ultra violet irradiation, and in the troposphere it is toxic for animals and plants. The effectiveness of ozone against pathogens is well recognized and ozone appears to be the best agent for sterilization of water. ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(96)90016-x
更新日期：1996-02-01 00:00:00
abstract：:In humans, the nasal retina projects to the contralateral hemisphere, whereas the temporal retina projects ipsilaterally. The nasotemporal line that divides the retina into crossed and uncrossed parts coincides with the vertical meridian through the fovea. This normal projection of the retina is severely altered in al...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2015.06.028
更新日期：2015-10-01 00:00:00
abstract：:The cause and therapy of neurodegenerative diseases remain unsolved puzzles. These diseases are correlated with presence of beta sheet-rich amyloid assemblies. Here, I derive and assemble puzzle pieces to obtain a loose end-tying hypothesis for cause with direct implications for therapy. I use the following extrapolat...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2017.11.001
更新日期：2018-01-01 00:00:00
abstract：:Review of 18th and 19th century psychiatric therapies raises the possibility that several may have altered the activity of vasopressin or Na-K-ATPase. Bleeding, whirling, nausea created by medicines, and vagus nerve stimulation by application of electricity through the skin all perturb the hypothalamic hormone, argini...
journal_title：Medical hypotheses
pub_type： 历史文章,杂志文章
doi：10.1016/j.mehy.2003.10.007
更新日期：2004-01-01 00:00:00
abstract：:Seasonal affective disorder is defined as recurrent episodes of major depression, mania, or hypomania with seasonal onset and remission. In this class of mood disturbances, a unipolar major depressive disorder known as winter depression is common in populations living in northern latitudes far from the equator. Winter...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.11.020
更新日期：2017-01-01 00:00:00
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, in...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(87)90003-x
更新日期：1987-01-01 00:00:00
abstract：:In observing the phenomenon of alterations of tumor cell phenotypes, one may envision a mechanism that induces the change in tumor cell characteristics and the appearance of metastasis. Schirrmacher (1) has suggested that the effect of the microenvironment on tumor cells influences the control of gene expression and t...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(81)90010-4
更新日期：1981-05-01 00:00:00
abstract：:A review of the literature shows that x-ray induced lung adenomas in mice, breast adenomas in rats and thyroid adenomas in rats show the same approximate dependence for number of tumors vs dose. It is hypothesized that these benign tumors are due to cell proliferation. The controls of the G1 stage of the cell cycle ha...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(83)90049-x
更新日期：1983-01-01 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
abstract：:The assumption is introduced that there are two types of adaptive responses in central neurons in response to significantly changed circuit activity. Morphological synaptic modifications and synapse turnover are thought to be involved in both of these responses, in such a way that in the first case they are to restore...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(91)90077-c
更新日期：1991-05-01 00:00:00
abstract：:It is known, that initial events in atherosclerosis arise in the intima with a parallel influx of inflammatory cells. I propose the opposite - that the disease onset begins from the media vascular smooth muscle cell (VSMC) involvement and through its utilization of modified low-density lipoproteins (LDL), and free or ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.12.002
更新日期：2015-02-01 00:00:00
abstract：:Acute carbon monoxide (CO) poisoning causes the neurologic symptoms and brain lesions during both acute and delayed phase. We propose that catecholamine crises in globus pallidus and deep white matter are the key pathophysiological factors causing acute and delayed brain injuries respectively. Increased sympathetic ac...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.04.032
更新日期：2014-08-01 00:00:00
abstract：:The problem how tumor cells get the metastatic ability is still a hot debate. Based on the premise that the default state of normal cells is quiescent rather than mobile, the classic progression and early metastasis model suggested that tumor metastasis should be an acquired trait contributed by the late or early gene...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.11.023
更新日期：2010-05-01 00:00:00
