Abstract：
:Corona virus disease 2019 (Covid-19), a pandemia emerged recently, caused by severe acute respiratory syndrome corona virus 2 (SARS-CoV-2). The receptor for corona virus and influenza A is the mucosal cell membrane protein angiotensin converting enzyme 2 (ACE2), which is abundant on the membrane of alveolar cells and enterocytes. Viral spike protein 1 (S1) is the ligand, with an affinity of 14.7 nM to the receptor. The main port of entry for the virus is the upper respiratory tract, and the diagnosis is usually by PCR of the viral RNA with nasal and pharyngeal swab test. Human defensin 5 (HDEF5) is a protein encoded by the DEFA gene, secreted by Paneth cells in the small intestine and by granules of neutrophils. It has an affinity of 39.3 nM to ACE2, much higher than that of the corona S1. HDEF5 may also attach to glycosylated Corona S1 protein, make its efficiency even better. The issues to be investigated are the affinity of HDEF5 to S1 protein, the ability of recombinant HDEF5 function in attaching both ACE2 and S1, and the feasibility to perform aerosol spray of this protein. In addition, safety and efficiency should be studied in phases I, II and II clinical protocols. Thus, an aerosol spray of HDEF5 given through the nose and throat, once to several times a day, may be a very efficient approach to prevent infection with SARA-CoV-2 as well as influenza A.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Niv Ydoi
10.1016/j.mehy.2020.110244subject
Has Abstractpub_date
2020-10-01 00:00:00pages
110244eissn
0306-9877issn
1532-2777pii
S0306-9877(20)32676-1journal_volume
143pub_type
信件abstract：:There are many published studies about the epigenetic effects of the prenatal and infant periods on health outcomes. However, there is very little knowledge regarding the effects of the intrapartum period (labor and birth) on health and epigenetic remodeling. Although the intrapartum period is relatively short compare...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.01.017
更新日期：2013-05-01 00:00:00
abstract：:The essential trace element selenium is known to be capable of reducing the toxicity of heavy metals like cadmium(II), mercury(II) and silver(I). One mechanism by which this occurs is through the formation of an inert metal selenide like silver selenide. It is not clear why selenide should react in the body preferenti...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(87)90107-1
更新日期：1987-10-01 00:00:00
abstract：:Epidemiologic literatures suggest that temporomandibular joint disorders (TMD) are more prevalent in women than in men. It is affecting approximately 7-15% of the adult population in North America, and 80% of patients treated for TMD are women. The severity of symptoms is also related to the age of the patients. The g...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.05.011
更新日期：2008-10-01 00:00:00
abstract：:Infection of the lymphatic system by Wuchereria bancrofti microfilaria is the most common cause of elephantiasis, a disease that affects over 100 million people. The nightly release of microfilaria into the circulation coincides with the feeding activity of its mosquito vector, a synchronization that is presumably an ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2009.02.034
更新日期：2009-08-01 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：:NETosis, being an alternative form of cell death is the creation of web-like chromatin decondensates by suitably primed neutrophils as a response to stimulus aimed at containing and eliminating the same. In certain situations, it causes more harm than benefit in the form of bystander damage directly or via activation ...
journal_title：Medical hypotheses
pub_type： 信件
doi：10.1016/j.mehy.2020.109968
更新日期：2020-11-01 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
pub_type： 杂志文章
doi：10.1016/0306-9877(93)90128-d
更新日期：1993-11-01 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：:Except for a few diseases of molecular mimicry such as rheumatic fever, post-streptococcal glomerulonephritis in children, and gluten-sensitive enteropathy, the cause of autoimmune diseases is unknown. Most autoimmune diseases are remitting-relapsing and the pathophysiology of either the initial attack or subsequent r...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.01.015
更新日期：2013-05-01 00:00:00
abstract：:A birth involving shoulder dystocia can rapidly deteriorate-from a fetus with a reassuring tracing in the minutes before birth, to a neonate needing aggressive resuscitation. Infants experiencing a traumatic birth involving shoulder dystocia may be severely compromised, even when the preceding labor was uncomplicated....
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.11.019
更新日期：2009-04-01 00:00:00
abstract：:A wealth of research data points to increased oxidative stress as a key driver of the cardiac remodeling triggered by chronic pressure overload, loss of functional myocardial tissue, or atrial fibrillation. Oxidative stress is a mediator of the cardiomyocyte hypertrophy and apoptosis, the cardiac fibrosis, and the def...
journal_title：Medical hypotheses
pub_type： 杂志文章,评审
doi：10.1016/j.mehy.2009.12.025
更新日期：2010-08-01 00:00:00
abstract：:Inflammatory bowel disease (IBD) is a chronic inflammatory disorder, with increasing incidence and prevalence in the last one-half century. IBD patients suffer from autonomic vagal neuropathy and nerve dysfunction, with deficiency of acetylcholine in inflamed mucosa. Recent studies showed that death of enteric neuron ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.07.038
更新日期：2012-11-01 00:00:00
abstract：:Atherosclerosis is a common disease whose complications, such as myocardial infarction, are a leading cause of mortality worldwide. Therefore, ideas which try to explain the circumstances of atherosclerotic plaque initiation and progression are warranted. We hypothesize that low-grade inflammation in early life (espec...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.10.026
更新日期：2019-01-01 00:00:00
abstract：:Coronavirus Diseases-2019 (COVID-19) has caused a large global outbreak and has been declared as a pandemic by the World Health Organization (WHO). It has been proposed that COVID-19-related hyperinflammation and dysregulated immune response might play a critical role in developing a cytokine storm which usually progr...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.109947
更新日期：2020-11-01 00:00:00
abstract：:Apoptosis is defined as the process of ''programmed cell death'' (PCD), during which many cells simultaneously die from within along a very orderly pattern. PCD is as intrinsic for cells as mitosis and is involved in both degenerative and developmental processes of organs and organisms. The pattern of apoptotic cell d...
journal_title：Medical hypotheses
pub_type： 社论
doi：10.1016/j.mehy.2007.07.006
更新日期：2008-01-01 00:00:00
abstract：:Pulmonary hypertension (PH) is defined as elevated mean pulmonary artery pressure secondary to e.g. congenital heart disease and chronic obstructive pulmonary disease. It elevates right ventricular afterload that eventually leads to cor pulmonale and right heart failure. Experimental research has shown that cardioprot...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.109572
更新日期：2020-04-01 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：:Kawasaki disease (KD) is an acute febrile systemic vasculitis of unknown etiology that occurs predominantly in children <5 years of age. For the etiopathogenesis of KD, there is no agreement even as to whether KD is an infectious disease or an immune-mediated disease. The epidemiologic characteristics of KD, including...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.12.051
更新日期：2007-01-01 00:00:00
abstract：:The morphological changes used to confirm a diagnosis of coeliac disease (CD) are precisely those predicted if the surface energy of the interface between duodenal epithelium and the luminal contents were raised to levels comparable to those demonstrated by the hydrophobic nature of the stomach wall. This hypothesis p...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(90)90126-y
更新日期：1990-07-01 00:00:00
abstract：:It is well known that chronic hepatitis C is associated with insulin resistance and metabolic syndrome which are risk factors for atherosclerosis and coronary heart disease. As a result, chronic hepatitis C might be thought, through its association with metabolic syndrome, to increase the risk of myocardial infarction...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.01.030
更新日期：2014-04-01 00:00:00
abstract：BACKGROUND:Bipolar disorder (BD) is characterized by recurrent episodes of mood dysregulations and depression is considered as the most frequent form of relapse. However, there is some evidence that in tropical countries, the course might be different with fewer depressive episodes. This study aims to examine the frequ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2014.06.017
更新日期：2014-09-01 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：:The classical form of Barlow's disease or infantile scurvy, with bruises, broken bones and sores that will not heal, is rarely seen today, but it seems to be reappearing under a different guise, when infants with borderline vitamin C depletion are assaulted with too many inoculations at one time.Moreover, it is now so...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(02)00114-7
更新日期：2002-07-01 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
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
pub_type： 杂志文章
doi：10.1016/0306-9877(92)90023-6
更新日期：1992-08-01 00:00:00
abstract：:Non-union after bone fracture is rather common with an increasing frequency of incidence rate due to poorly treated early operations, among which the mechanism of atrophic non-union remains unclear. Previous opinions showed that impaired blood supply of affected limbs might mostly contribute to the atrophic non-union,...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2011.03.027
更新日期：2011-07-01 00:00:00
abstract：:The title enzyme, peptidylglycine alpha-hydroxylating monooxygenase (PHM), is essential to the in vivo generation of a wide variety of physiologically significant alpha-amidated peptide hormones from the corresponding C-terminal glycine-extended prohormones. Over a 20-year period of time a massive amount of experiment...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2003.11.012
更新日期：2004-01-01 00:00:00
abstract：:COVID-19 exacts a disproportionate toll on both the elderly and those with diabetes; these patients are more likely to require costly intensive care, longer hospitalisation, and die from complications. Nations would thus find it extremely difficult to either lift or sustain socially, economically, and politically dama...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.110374
更新日期：2021-01-01 00:00:00
abstract：:Erectile dysfunction after nerve injury is a common disease after radical prostatectomy. Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family, which plays an important role in the survival of existing neurons, the differentiation of new neurons, and synaptic plasticity. It has been demonstra...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.10.014
更新日期：2019-01-01 00:00:00
abstract：:Doppler sonography is used as a routine test for detection of renal artery stenosis (RAS). Although increased peak systolic velocity at the site of the narrowing is a widely accepted method for assessing main renal artery stenosis, tardus parvus phenomenon detected on the downstream blood flow has been used as an alte...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.01.016
更新日期：2019-03-01 00:00:00
