Abstract：
:Diabetes is a global public health challenge that imposes heavy burdens on communities and individuals. Metformin, the first-line medication for diabetes, has the superiority of reducing risk of macrovascular diseases, all-cause mortality and even possibly cancers. Recent observational studies, however, have demonstrated that long-term metformin therapy increases the probability of vitamin B12 and folate deficiency, and might contribute to the progression of diabetic peripheral neuropathy. Despite metformin is widely used and extensively studied, randomized controlled trials performed to explore the effects of metformin on vitamin B12 and folate are limited. Besides, whether short-term treatment causes vitamin deficiency is a pending issue. We postulate that even a few-month treatment with metformin results in the decrease of vitamin B12 and folate. However, supplementation of vitamin B12 rather than the combination of vitamin B12 and folate might be profitable based on the mechanism of metformin on vitamins in patients with type 2 diabetes. This viewpoint differs from those of majority that a combined supplementation of vitamin B12 and folate is inclined to be advised.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Xu L,Huang Z,He X,Wan X,Fang D,Li Ydoi
10.1016/j.mehy.2013.05.025subject
Has Abstractpub_date
2013-08-01 00:00:00pages
149-51issue
2eissn
0306-9877issn
1532-2777pii
S0306-9877(13)00254-5journal_volume
81pub_type
杂志文章abstract：:This paper will show that the fractional difference in the human gender ratio (GR) between the GR(at death) for those born in solar cycle peak years (maxima) and the GR(at death) in those born in solar cycle non-peak years (minima), e.g., 0.023, divided by Pi, yields a reasonable approximation of the quantum mechanica...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.03.028
更新日期：2009-09-01 00:00:00
abstract：:Gastroesophageal reflux (GER) and asthma have been linked, but the true nature of this relationship is incompletely understood. Most of the literature examining this association has implicated GER as the factor contributing to asthma. GER has also been linked to conditions of the upper airway like sinusitis and obstru...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.12.030
更新日期：2010-06-01 00:00:00
abstract：:The modified base 5-methylcytidine has been found in the DNA of a number of different eukaryotic cells where it occurs principally in the dinucleotide sequence -CmpG- which is present as a palindrome in double-strand nucleic acid molecules. There is considerable evidence to indicate and suggest that 5-methylcytosine s...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(84)90117-8
更新日期：1984-10-01 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
pub_type： 杂志文章
doi：10.1016/0306-9877(93)90069-3
更新日期：1993-10-01 00:00:00
abstract：:Restless legs syndrome (RLS) exhibits sensorimotor symptoms. In familial cases, a gene at chromosomal location 9p-24-22 is linked to RLS and the expressed mutation is Dopamine Receptor Specific Individual Sensitivity (DRSIS). The symptoms are triggered during changes in alertness, generally at sleep hours, resulting f...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.02.028
更新日期：2009-08-01 00:00:00
abstract：:Multidrug resistance (MDR) is a phenomenon expressed by many tumors affecting the chemotherapy efficacy, treatment decision, and the disease prognosis. Considering its great implication, non-invasive approaches are needed to identify this phenomenon in early stages of the disease. This article discusses the potential ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.01.016
更新日期：2016-04-01 00:00:00
abstract：:Insulin resistance (IR) is a common denominator of metabolic and hemodynamic disorders simultaneously present in one person and responsible for elevated risk of developing type 2 diabetes (T2DM) and cardiovascular incidents. According to the latest research, IR is present in 25-45% of the general population. Therefore...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.02.032
更新日期：2018-05-01 00:00:00
abstract：:'Electrohypersensitivity' is often explained as a psychological syndrome. Our modern environment contains a lot of different substances and some of them are toxic. Mycotoxins are types of toxins that are biologically very active and that affect living organisms. Mycotoxins and fungi capable of producing toxins have be...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.1999.1045
更新日期：2000-09-01 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：:Several experiments show that there is a cell to cell communication by light in different cell types. This article describes theoretical mechanisms and subcellular structures that could be involved in this phenomenon. Special consideration is given to the nervous system, since it would have excellent conditions for su...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/S0306-9877(03)00308-6
更新日期：2004-01-01 00:00:00
abstract：:Mandibular asymmetry (MA) is one of the most common craniofacial malformations. However, there is no optimal technique for this malformation nowadays. A novel technique for both children and adults with less disadvantages is a must. Parathyroid hormone (PTH) is a straight-chain polypeptide secreted by the parathyroid ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.10.047
更新日期：2010-04-01 00:00:00
abstract：:The etiology of sudden-death ischemic heart disease (SDIHD) remains an enigma. Data will be presented which suggest that SDIHD may be due to hypomagnesemia in and around the coronary arterial and arteriolar vessels. We have found that blood vessels (especially arteries and arterioles) deficient with respect to Mg can ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(79)90074-4
更新日期：1979-08-01 00:00:00
abstract：:In orthognathic surgery, many serious medical disputes and postsurgical dissatisfactions are not caused by the doctors' reasons, but due to the patients' psychological problems. These adverse events obsess not only surgeons, but also patients to a great extent. An effective method is expected to screen patients for or...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.04.022
更新日期：2013-08-01 00:00:00
abstract：:Randomized clinical trials comparing neoadjuvant chemotherapy (NAC) followed by surgery with initial surgery in cervical cancer reported conflicting results. We provided a hypothesis explaining the different outcomes between trials. NAC was reported to make a lymph node metastasis smaller. Smaller tumors are hard to d...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.05.026
更新日期：2009-12-01 00:00:00
abstract：:An unacceptably high incidence of preterm labour is seen in the black and coloured communities of South Africa. This hypothesis proposes that sodium-potassium adenosine triphosphatase activity plays an important role in preterm labour. The impaired activity of the sodium pump leads to increased cytosolic calcium level...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(96)90081-x
更新日期：1996-09-01 00:00:00
abstract：:Although all multicellular organisms undergo structural and functional deterioration with age, senescence is not a uniform process. Rather, each organism experiences a constellation of changes that reflect the heterogeneous effects of age on molecules, cells, organs and systems, an idiosyncratic pattern that we refer ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.12.031
更新日期：2010-06-01 00:00:00
abstract：:Previous research from our group suggests that patients with lesions in the left inferior parietal lobule (IPL)-which is concerned with abstract numerical cognition and cross-modal association (which is consistent with its strategic location at the crossroads between the temporal, parietal and occipital lobes) have di...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.01.033
更新日期：2014-06-01 00:00:00
abstract：:Too small size at birth (due to poor fetal growth and/or preterm delivery) has been associated with substantially elevated risks of the metabolic syndrome (dislipidemia, insulin resistance, hypertension), type 2 diabetes and cardiovascular disease in adulthood. The mechanisms of such "fetal origins" or "programming" o...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.08.020
更新日期：2006-01-01 00:00:00
abstract：:We tested the hypothesis that if SPECT/CT-detected volumes of active and inactive parts of brain tissue present correlation with the results of hyperbaric oxygen therapy (HBOT) of ischemic stroke, SPECT imaging may serve as a selective tool for post-stroke patients to indicate cases that may significantly benefit from...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109510
更新日期：2020-03-01 00:00:00
abstract：:Nasopharyngeal angiofibroma is a histologically benign tumor composed of stroma and vessels. The vascular component of the lesion is prone to bleeding and responsible for its clinical "malignancy". Some nasopharyngeal angiofibromas are resistant to surgical therapy because of extensive growth and occasionally bone des...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2007.06.011
更新日期：2008-01-01 00:00:00
abstract：:Endothelial dysfunction due to reduced bioavailability of nitric oxide (NO) is an early step in the course of atherosclerotic cardiovascular disease (CVD). NO is synthesized from L-arginine via the action of NO synthase (NOS), which is known to be blocked by endogenous L-arginine analogues such as asymmetric dimethyla...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2007.01.053
更新日期：2007-01-01 00:00:00
abstract：:The time of re-evaluation of the role of human immunodeficiency viruses in the pathogenesis of acquired immune deficiency syndrome has now come, now that methods are available for the direct detection of human immunodeficiency viruses and for the detection of cellular anti-human immunodeficiency virus immune reactions...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(96)90192-9
更新日期：1996-04-01 00:00:00
abstract：:The Sudden Infant Death Syndrome (SIDS) is responsible for the death of 10,000 infants annually in the U.S.A. The cause of these deaths is not known; all SIDS infants studied died during sleep in a silent fashion and there are no specific lesions observable post mortem. It may be of significance, however, that nearly ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(87)90195-2
更新日期：1987-03-01 00:00:00
abstract：:Diabetic individuals frequently suffer from skin pathologies, especially in their feet. Co-existing peripheral vascular disease and neuropathy exacerbate the capacity of these individuals to cope with infections, minor cuts and wounds, often leading to hard to treat and chronic ulcers. Copper has potent anti-fungal an...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.02.050
更新日期：2009-12-01 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 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：:Ebola virus (EBOV) infection is associated with modulation of cytokine expression in infected patients. EBOV has been shown to interact directly with immune cells (at minimum with macrophages and dendritic cells) and modulation of cytokine expression has also been observed in vitro, which is similar to that in vivo. T...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2015.05.009
更新日期：2015-09-01 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
abstract：:Approximately 15 million Americans including over 5 million children suffer from asthma, the most common chronic disease in childhood. The prevalence of pediatric asthma has risen sharply over the past four decades, with the sharpest increases occurring in children younger than 6 years and in urban, predominantly mino...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2003.10.001
更新日期：2004-01-01 00:00:00
abstract：:In the present report we have developed a mathematical model to describe the processes involved during high steroid therapy. We have shown that the model can predict clinical observations as well as determine the optimum steroid regimen without relying on trial and error methods. The model incorporates rate processes ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2001.1308
更新日期：2001-07-01 00:00:00
