Abstract：
:Vitamin A is a fat-soluble vitamin required for many physiological functions. The intracellular transport of vitamin A is assisted by proteins called cellular retinol-binding proteins (CRBP I/II). The absorption, storage and usage of vitamin A are regulated by a protein called lecithin:retinol acyltransferase (LRAT), a retinol-related enzyme that transfers an acyl group derived from an sn-1 position of phosphatidylcholine to retinol. LRAT is a member of the protein family which includes HRAS-like tumor suppressors (HRASLS). However, the HRASLS proteins never use retinol as an acyl acceptor. The mechanisms underlying the different substrate specificities between LRAT and HRASLS proteins are unknown. We propose in this report that LRAT physically interacts with CRBP and the LRAT-CRBP complex represents the binding pockets for both an acyl group and retinol, thus assuring the substrate specificity of LRAT.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Mezaki Y,Fujimi TJ,Senoo H,Matsuura Tdoi
10.1016/j.mehy.2016.01.013subject
Has Abstractpub_date
2016-03-01 00:00:00pages
60-2eissn
0306-9877issn
1532-2777pii
S0306-9877(16)00032-3journal_volume
88pub_type
杂志文章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：:There is growing dissatisfaction regarding the available diagnostic systems for psychiatric disorders (DSM, ICD). Psychiatrists acknowledge that though mental disease reflects brain disorders, the descriptive and symptom based nature of psychiatric diagnosis bears no relation to brain functions. According to Helmut's ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2004.02.010
更新日期：2004-01-01 00:00:00
abstract：:In idiopathic scoliosis the convexity of the thoracic curve of the vertebral column is most commonly directed toward the right side. The right lung is normally larger than the left lung. This asymmetry acting through chest wall movement is hypothesized to exert rotatory forces on the vertebral column. The result, in p...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(89)90074-1
更新日期：1989-04-01 00:00:00
abstract：:The mitogenic action of the estrogen-receptor complex is supposedly similar in both normal and malignant target tissues. As receptors are present in several types of non-target tissues, in the case of lesions at the nuclear acceptor sites, the complex in those might be able to cause successive mitoses. Estrogen-depend...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(79)90044-6
更新日期：1979-09-01 00:00:00
abstract：:The Davson-Danielli model of the cell membrane accounted for nearly all the space within it by suggesting that it was composed of structural proteins and lipids; this would leave virtually no space for the large number of enzymes, carriers, antigens, antibodies, and receptors for hormones, transmitters, drugs and toxi...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(88)90100-4
更新日期：1988-07-01 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：:Recent findings indicate a principal role for Hepcidin in iron homeostasis. Hepcidin is also thought to play a vital role in the pathogenic mechanism of anaemia in patients with inflammation or chronic disease. Under normal conditions influx and efflux of iron from duodenal enterocytes is regulated by Ferroportin. Fer...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2007.10.007
更新日期：2008-01-01 00:00:00
abstract：:Skin cells produce endogenous opioids in response to light. This results in increased skin and plasma levels of endogenous opioids. Increased plasma levels of endogenous opioids may improve mood and affect behavior. The author suggests that improvement in mood after exposure to light may be related to the light-induce...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2001.1423
更新日期：2001-11-01 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：:Bovine serum albumin and human serum transferrin modified by the water soluble carbodiimides N-ethyl-N'-(3-dimethyl propylamino) carbodiimide (CDI) or N-ethyl-N'-(3-trimethyl propylammonium) carbodiimide (Me+CDI) to yield N-acylurea proteins bind pBR322 DNA reversibly showing electrostatic and non-electrostatic compon...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(87)90044-2
更新日期：1987-09-01 00:00:00
abstract：:A new hypothesis is presented to explain some aspects of human smoking behaviour. While acknowledging the importance of the nicotine self-titration phenomenon, changes in puffing intensity during the smoking of a single cigarette are related not to the control of nicotine uptake but to the modification of cigarette sm...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(85)90087-8
更新日期：1985-08-01 00:00:00
abstract：:The current epidemic of obesity has developed at a rate that cannot be attributed to genetic drift. Attempts to treat obesity using diet and activity have been largely disappointing. Genes are fixed at conception, but genetic expression is known to be influenced by nutriture during the stages of growth and development...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.02.019
更新日期：2006-01-01 00:00:00
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 mecha...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2000.1209
更新日期：2001-02-01 00:00:00
abstract：:Recent studies suggest that blood-borne metabolites of gut microbiota, such as trimethylamine N-oxide (TMAO) are involved in the aetiology of cardiovascular diseases and may serve as markers of cardiovascular risk. To enter the bloodstream the microbiota-derived molecules need to pass the gut-blood barrier (GBB). The ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.11.012
更新日期：2017-01-01 00:00:00
abstract：BACKGROUND:Somatization is a multisomatoform disorder characterized by medically unexplained, functional or psychosomatic symptoms. Similar somatic symptoms are key components of depression and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS). METHODS:This paper reviews the evidence that such symptoms are o...
journal_title：Medical hypotheses
pub_type： 杂志文章,评审
doi：10.1016/j.mehy.2012.02.023
更新日期：2012-06-01 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：:Fibromyalgia syndrome (FMS) is a chronic widespread pain syndrome that is estimated to affect 4-8 million US adults. The exact molecular mechanisms underlying this illness remain unclear, rendering most clinical treatment and management techniques relatively ineffective. It is now known that abnormalities in both noci...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.01.052
更新日期：2009-08-01 00:00:00
abstract：:Studies have reported an increasing incidence of thyroid cancer worldwide. The reasons are likely related to improved imaging modalities, altered histopathologic criteria for diagnosis of thyroid cancer, and nuclear exposure. However, the classical assumption derived from epidemiological studies is that it should be q...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.08.021
更新日期：2010-01-01 00:00:00
abstract：:Digital ulcers (DU) are a common manifestation of systemic sclerosis (SSc) and occur at a variety of locations including the fingertips and over the extensor aspects of the hands. However, most recent clinical trials have included only fingertip DUs as these are believed to be ischaemic in aetiology, and therefore lik...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.04.024
更新日期：2018-07-01 00:00:00
abstract：:The ongoing coronavirus disease 2019 (COVID-19) pandemic caused by the SARS-CoV-2 virus is now considered a global public health threat. The primary focus has been on reducing the viral spread and treating respiratory symptoms; as time goes on, the impact of COVID-19 on neurological and haemostatic systems becomes mor...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.110480
更新日期：2021-01-04 00:00:00
abstract：:Genetic and environmental influences are both known to be causal factors in the development and maintenance of obesity. Stress related chronic stimulation of the hypothalamic-pituitary-adrenal (HPA) axis and resulting increased glucocorticoid exposure are known to be important pathophysiological mechanisms in the deve...
journal_title：Medical hypotheses
pub_type： 杂志文章,评审
doi：10.1016/j.mehy.2010.10.049
更新日期：2011-03-01 00:00:00
abstract：:The comorbidity of eating disorders and reflex sympathetic dystrophy syndrome in the same patients raises the possibility of a common pathway for both conditions. Reflex sympathetic dystrophy syndrome may be manifesting itself in those individuals who have sympathetic overdrive. Microtrauma, often induced by compulsiv...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(97)90305-4
更新日期：1997-03-01 00:00:00
abstract：:The exact aetiology of mitral valve prolapse (MVP) is unknown, although this is the most common cardiac valvular abnormality currently detected. MVP has high incidence in young individuals, particularly during the second and third decades. These individuals are usually of a slender body habitus indicating higher rates...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.1999.0016
更新日期：2000-02-01 00:00:00
abstract：:Sudden cardiac death prematurely claims the lives of some 7 million each year worldwide. It occurs primarily in patients with an underlying structural cardiac abnormality, and regardless of the type of the underlying pathology (heart failure, dilated and hypertrophic cardiomyopathies, myocardial infarction and aging),...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.02.018
更新日期：2008-08-01 00:00:00
abstract：:The exact contribution of the sirtuin family of NAD+-dependent histone deacetylases to longevity in metazoans is, at present, not completely understood but nonetheless regarded as significant. Despite the rapidly accreting evidence solidifying the role of NAD+-dependent histone deacetylase activity in longevity-promot...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2005.08.032
更新日期：2006-01-01 00:00:00
abstract：:In attempts to develop a rational anticancer strategy the same homologous tissue in 3 conditions were used side by side as targets: normal epidermis of the mouse back. Tween 60R-provoked benign epidermal hyperplasia, and carcinogen-provoked malignant condition. In contrast to the highest tolerated doses of the cytosta...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(82)90116-5
更新日期：1982-03-01 00:00:00
abstract：:The molecular similarity between certain human antigenic determinants with those of HIV has been already described. In this matter, we have previously demonstrated, by a chromatographic method, the cross reactivity of human serum albumin with HIV gp 120. The hypothesis that this similarity could be one of the reasons ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2001.1520
更新日期：2002-05-01 00:00:00
abstract：:Random connection weight disturbances within an assembly of artificial neural networks (ANN) drive a progression of activation patterns that are tantamount to the memories and ideas nucleating within the brain's cortex. The numerical evaluation of these pattern-based notions by another, more placid system of ANNs gove...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.07.010
更新日期：2016-09-01 00:00:00
abstract：:Reconciling the early promising results of radiation therapy in the treatment of epilepsy with the recent theory concerning the role of nonsynaptic mechanisms in focal epileptogenesis, it is suggested that the potential of irradiation as an alternative to temporal lobe resection in intractable epilepsy should be re-ev...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(80)90102-4
更新日期：1980-05-01 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
