Abstract：
:Many embryonic genes may be sets of repeated genes. Processes of differentiation where the quantity of gene activity changes during embryogenesis may not reflect the transcription rate per se but instead be a result of the state of expression of constitutive repeated genes. Such repeated genes (in fact or theory) is dealt with here for embryonic, adult and neoplastic liver. Explanations are presented for 1) the variation in ATP: L-methionine S-adenosyltransferase activity in spontaneous hepatomas and embryonic liver; 2) differences tRNA L-methionine S-adenosyltransferase activity in spontaneous hepatomas and embryonic liver; 3) differences in tRNA methylase activity in embryonic liver, hepatomas of varying levels of differentiation, and ethionine treated liver; 4) relationships between rRNA genes and nucleolar organizers; and 5) the possibilities involving c-onc genes (proto-oncogenes) for situations of 'over-expression' in neoplastic and embryonic liver.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Hancock RLdoi
10.1016/0306-9877(91)90220-ssubject
Has Abstractpub_date
1991-03-01 00:00:00pages
256-60issue
3eissn
0306-9877issn
1532-2777pii
0306-9877(91)90220-Sjournal_volume
34pub_type
杂志文章abstract：:Elevated levels of aluminium (Al), strontium (Sr), barium (Ba), iron (Fe), manganese (Mn) cations - combined with deficiencies of magnesium (Mg)/calcium (Ca) - have been observed in the foodchains that traditionally support the Chamorro populations affected by high incidence clusters of Alzheimer (AD), Parkinson-like ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2004.04.029
更新日期：2004-01-01 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
pub_type： 杂志文章
doi：10.1016/0306-9877(93)90247-n
更新日期：1993-09-01 00:00:00
abstract：:Melatonin is well recognized for its role as a potent antioxidant and is directly implicated in the free radical theory of aging [1] [Reiter RJ, Pablos MI, Agapito TT, Guerrero JM. Melatonin in the context of the free radical theory of aging. Ann N Y Acad Sci 1996;786:362-78]. Moreover, melatonin has been shown to ret...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.12.041
更新日期：2007-01-01 00:00:00
abstract：:Timely recanalization of infarct related artery along with effective myocardial cell reperfusion represents a major challenge in the management of STEMI. The reperfusion of coronary arteries can induce further cardiomyocyte death by generating oxidative stress, which itself can mediate myocardial damage through a numb...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2017.03.010
更新日期：2017-05-01 00:00:00
abstract：:Therapies for preventing reperfusion injury (RI) have been widely studied. However, the attempts to transfer cardioprotective therapies for reducing RI from experiments into clinical practice have been so far unsuccessful. Pathophysiological mechanisms of RI are complicated and compose of many pathways e.g. hypercontr...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.109558
更新日期：2020-04-01 00:00:00
abstract：:Primary hyperparathyroidism is one of the most common causes of hypercalcemia. Most cases result from sporadic benign monoclonal adenomas or hyperplasia. Increased body weight is consistently present in cohorts of patients with primary hyperparathyroidism. It has been shown that fat mass is the major determinant of se...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2010.08.039
更新日期：2011-01-01 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：:It has been uncovered that expansion of trinucleotide repeats in the human genome are causing a variety of genetic diseases. They are also identified in other loci that are not clearly related to particular diseases, which indicates such repeat expansion is one of the general forms of evolution occurring throughout th...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2000.1140
更新日期：2001-03-01 00:00:00
abstract：:Many experimental, clinical and epidemiological data indicate that n-3 and n-6 essential fatty acids are therapeutic nutrients which may delay the development as well as improve the course of cancer. The present hypothesis correlates well with these data and it is proposed that chronic essential fatty acid deficiency,...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/s0306-9877(97)90024-4
更新日期：1997-01-01 00:00:00
abstract：:Interleukin (IL)-1, an established mediator of inflammation, is also a mediator of ovulation (a cyclic inflammatory-like process). We have shown that IL-1 beta induces the in vitro expression of genes believed to play important role in ovulation (IL-1 beta itself, its receptors, IL-1 beta receptor antagonist, glucose ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1054/mehy.2001.1389
更新日期：2002-01-01 00:00:00
abstract：:Medicine today is an extremely heterogeneous field of knowledge, based on clinical observations and action knowledge and on data from the biological, behavioral and social sciences. We hypothesize at first that medicine suffers from a disciplinary hyper-diversity compared to the level of conceptual interdisciplinary i...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2019.109386
更新日期：2019-12-01 00:00:00
abstract：:Humans vary in the gene that encodes for Vitamin K epoxide reductase complex (VKORC1). Recent research has documented the protective effect of Vitamin K on neural cells and its role in maintaining normal neural development. Of interest, specific neural effects of Vitamin K overlap with key brain development aberration...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2016.09.013
更新日期：2016-11-01 00:00:00
abstract：:Extracellular matrix metalloproteinase inducer (EMMPRIN), which is also called BASIGIN/CD147, is a cell surface glycoprotein that belongs to the immunoglobulin superfamily and plays a significant role in intercellular recognition in immunology, cellular differentiation and development. Apart from ACE-2, recently EMMPR...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2020.110089
更新日期：2020-10-01 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：:Physiological levels of estrogen would seem to have a possible protective effect on hearing function and estrogen replacement therapy may delay hearing loss in menopausal women. Treatment of healthy menopausal women with Tibolone for 6 months resulted in improvement in audiometry results at low frequencies which was m...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2010.11.018
更新日期：2011-03-01 00:00:00
abstract：:Preliminary reports have demonstrated that anterior nucleus thalamus high-frequency electrical stimulation (ANT-HFS) is an effective treatment for patients who suffer from medically refractory epilepsy. However, its extensive application has been hampered by the high cost and the unpredictable outcome before the opera...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.06.001
更新日期：2013-09-01 00:00:00
abstract：:Traumatic iris sphincter tear has been thought to occur secondary to anteroposterior compression of the globe with defined forces lead to equatorial expansion and active pull along the corneoscleral junction and sphincter tear. However, here in this report, we elaborate the additional forces involved in the traumatic ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.11.013
更新日期：2019-01-01 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 psychological attributes of intelligence and personality are usually seen as being quite distinct in nature: higher intelligence being regarded a 'gift' (bestowed mostly by heredity); while personality or 'character' is morally evaluated by others, on the assumption that it is mostly a consequence of choice? So a ...
journal_title：Medical hypotheses
pub_type： 社论
doi：10.1016/j.mehy.2009.06.048
更新日期：2009-10-01 00:00:00
abstract：:Angiogenesis and the acquisition of an angiogenic phenotype is important for cancer cell proliferation. Copper in an essential trace element that participates in many enzymatic complexes like the cytochrome c, superoxide dismutase and lysyl oxidase and it is involved in processes, like embryogenesis, growth, angiogene...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2013.09.035
更新日期：2013-12-01 00:00:00
abstract：:Although Still's disease has been first described more than one century ago, it still appears as an orphan entity, which should be separated from the other auto-inflammatory diseases (AID). The main reason to individualize Still's disease among the AID is the absence of any genetic predisposition. Recently, the human ...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2012.04.009
更新日期：2012-08-01 00:00:00
abstract：:Innumerable studies have been carried out by people to trace out those elements, find out the mechanisms that are vital to the maintenance of stemness. Amongst them, the one which is gaining importance in the recent past is the metabolism of stem cells, especially One carbon metabolism. Being associated directly or in...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2017.12.019
更新日期：2018-02-01 00:00:00
abstract：:The constant level of various proteins including albumin and cellular components in intravascular pool in vivo is strictly controlled by an unknown homeostatic mechanism, although there are fluctuations seen in pathologic conditions. Because the majority of the IgG in the serum is regarded as self-reactive natural aut...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2006.04.011
更新日期：2006-01-01 00:00:00
abstract：:Micelle is a stable, passively targetable and solubilizing minute particle, and plays a key role to anticancer drug delivery for chemotherapy. With an increasing number of novel polymeric micelles synthesized, many anticancer drugs have been core-encapsulated in the micelles. However, only single drug was studied as t...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2008.05.002
更新日期：2008-09-01 00:00:00
abstract：:Body size and body composition have been suggested as the best explanation for the temporal trend toward early menarche over the last 100 years. There is evidence from human and animal studies that indicates that body size is not the primary factor in influencing the occurrence of menarche. The data actually show that...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(81)90124-9
更新日期：1981-11-01 00:00:00
abstract：:It is suggested that apart from aflatoxins, plant medicinal preparations containing active compounds imperatorin, dictamine, marmesin and heraclenin may be responsible for some human cancers in Nigeria and perhaps other parts of Africa. Therefore, in this paper, a hypothesis is put forward that these compounds or thei...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(83)90096-8
更新日期：1983-07-01 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
pub_type： 杂志文章
doi：10.1016/0306-9877(92)90002-t
更新日期：1992-01-01 00:00:00
abstract：:Auer rods are cytoplasmic inclusions found only in the leukaemic cells of some cases of acute myeloid leukaemia (AML). The ultrastructure of Auer rods is different in different sub-types of the disease and it is suggested here that this may be a consequence of the Auer rods consisting of different crystalline forms of...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(89)90058-3
更新日期：1989-11-01 00:00:00
abstract：:It is increasingly admitted that Crohn's disease and ulcerative colitis, the two entities of inflammatory bowel disease, are initiated and reactivated by environmental factors in genetically susceptible hosts, and result from aberrant immune response to specific intestinal microbes, in the context of altered compositi...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/j.mehy.2018.03.009
更新日期：2018-06-01 00:00:00
abstract：:Foster found areas with the highest incidence of SIDS in USA in 1983-1984 coincided with the highest areas recorded with the highest incidence of goitre in First World War troops (1). Reid compared the two populations described as having the highest incidence of SIDS worldwide. Both were selenium deficient areas (King...
journal_title：Medical hypotheses
pub_type： 杂志文章
doi：10.1016/0306-9877(94)90124-4
更新日期：1994-04-01 00:00:00
