Abstract:
:The dissimilarities in spin-lattice relaxation time (T1) of water proton from one tumor to the other is due to the yield of hypoxic fraction in the tumor. The yield of higher relaxation time (T1) in the KHT tumor compared to the RIF-1 tumor as a function of growth is due to the hypoxic fraction of the tumor. The hypoxic fraction in the tumor is also responsible for the P-31 spectral parameter changes.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Akber SFdoi
10.1016/0306-9877(92)90007-ykeywords:
subject
Has Abstractpub_date
1992-01-01 00:00:00pages
24-6issue
1eissn
0306-9877issn
1532-2777pii
0306-9877(92)90007-Yjournal_volume
37pub_type
杂志文章abstract::Evidence from clinical and experimental studies has shown that placebos influence mood and behavior, that endogenous opioids are involved in the placebo effect, and that the endogenous opioid system is related to psychological events. Recent studies have also demonstrated that the endogenous opioid system is closely c...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/s0306-9877(97)90105-5
更新日期:1997-04-01 00:00:00
abstract::Glaucoma is the leading cause of irreversible blindness worldwide, which is now viewed as a disease of brain with pathogenesis not fully understood. The main diagnostic methods are examining the retinal nerve fiber layer through optical coherence tomography and investigating visual field defect, but these methods pres...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2018.12.020
更新日期:2019-02-01 00:00:00
abstract::Epilepsy is a chronic neurologic disorder which often induces numerous adverse long-term neurologic effects, such as behavioral and cognitive deficits, increased predisposition to additional seizures, and cell injury or death. Cognitive dysfunction, depression, anxiety and sleep disorders are some of the highly preval...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2013.11.017
更新日期:2014-01-01 00:00:00
abstract::Reflux of biliary secretions into the pancreatic duct following gallstone obstruction of the common biliary pancreatic ampulla has been implicated as a cause of acute pancreatitis. However, the pancreatic duct pressure is higher than the biliary pressure and, therefore, the simple obstruction of the choledochoduodenal...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.1998.0896
更新日期:2000-04-01 00:00:00
abstract::Schmorl's nodes (SNs) are common abnormalities in the human spine, which represent herniation of the nucleus pulposus of the intervertebral disc into the adjacent cartilaginous endplate of the vertebra. However, the principle mechanism of SNs is still not fully understood. And the relationship of SNs in the spine and ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2009.09.044
更新日期:2010-03-01 00:00:00
abstract::Rodent studies reveal that oxidative stress, much of it generated via induction/activation of NADPH oxidase, is a key mediator of a number of the pathogenic effects of chronic ethanol overconsumption. The highly reactive ethanol metabolite acetaldehyde is a key driver of this oxidative stress, and doubtless works in o...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2012.12.040
更新日期:2013-04-01 00:00:00
abstract:UNLABELLED:Physiological acts present the puzzle that we are unable to explain how we performed them, how we solved the technical difficulties involved in their execution. For instance, when we sing, we produce various musical notes by changing the shape of the larynx. The normal person does not even know what the lary...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/s0306-9877(02)00156-1
更新日期:2002-12-01 00:00:00
abstract:UNLABELLED:T helper (Th) lymphocytes have been classified into distinct subsets, Th1 and Th2 on the basis of the cytokines they produce. According to the cross-regulatory properties of Th1 and Th2 cells, one would assume that to be affected by a Th1 type disease increases susceptibility to a Th1 type disease and inhibi...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2006.03.039
更新日期:2006-01-01 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::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:UNLABELLED:Teeth start as bi-layered epithelial soft tissue follicles within bony jaws. Follicles grow into teeth and erupt. Early third molar follicles are detectable 8-9 years (±9 months). Intra-oral dental arches of jaws have finite space accommodating formed crowns. The last teeth to erupt are third molars. When th...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2012.05.031
更新日期:2012-09-01 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::Consideration of nine major factors predisposing to cerebral thrombosis, coronary thrombosis or thrombosis in the deep veins of the calf, reveals that these factors all have one thing in common. Estrogen administration, pregnancy, ageing, smoking, infection, trauma, surgery, soft water and winter season are all associ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(79)90072-0
更新日期:1979-08-01 00:00:00
abstract::Plasticity of adult cells has been identified in several post-natal tissues in the past few years and has attracted special attention in regenerative medicine. Skin is the biggest organ in the body. Adult skin consists of epidermis, dermis and appendages such as hairs and glands which are linked to the epidermis but p...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2003.12.022
更新日期:2004-01-01 00:00:00
abstract::Natural objects, live and inanimate, actively maintain their entities by using their capacities (i.e., properties, internal resources, mechanisms, and experience) adequately to their needs. It is suggested that the principle of adequate function is a law of nature. ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(86)90078-2
更新日期:1986-03-01 00:00:00
abstract::Howard Gardner identified five different kinds of creative activity among eminent creators, namely, solving a well-defined problem, putting forth a general conceptual scheme, creating a product that embodies ideas, stylized innovation of an art form, and a 'high-stakes' performance in the socio-political arena. In thi...
journal_title:Medical hypotheses
pub_type: 传,历史文章,杂志文章
doi:10.1054/mehy.1998.0777
更新日期:1999-10-01 00:00:00
abstract::A localized graft-versus-host reaction was used to assess the cellular immunity of mice supporting progressive growth of an allogeneic tumor. It was found that early in tumor development anti-tumor-cellular-mediated immunity was hyper-responsive, and that adherent phagocytic cells isolated from the neoplasm would inhi...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(79)90050-1
更新日期:1979-09-01 00:00:00
abstract::Essential hypertension is a heterogeneous multifactorial syndrome associated with a high cardiovascular risk. A multiple choice of antihypertensive drugs is available; however, a high individual variability to the antihypertensive therapy is still responsible for a modest reduction of the CV risk and not satisfactory ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2006.07.058
更新日期:2007-01-01 00:00:00
abstract::Organogenesis is the result of cell allocation followed by cell differentiation, and the processes involved are still to be elucidated. Present-day teaching suggests that the cytoplasmic membrane, the extracellular matrix and the cytoskeleton, in combination, are responsible, but the literature also suggests that othe...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/s0306-9877(96)90249-2
更新日期:1996-03-01 00:00:00
abstract::Parkinson disease (PD) is a chronic progressive degenerative disorder that affects over 6 million people worldwide. It is manifested by motor and psychiatric signs. The latter inflicts up to 88% of PD patients. With the prolongation of life expectancy, it is presumed that the prevalence of PD will further rise, togeth...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2010.07.024
更新日期:2010-12-01 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::Contributory risk factors to premature coronary artery disease (CAD) in premenopausal women are poorly understood and data on this subset of women is lacking. There is growing evidence that the process of inflammation is a part of the atherosclerotic process. Mechanistic insights from animal work suggest that the prof...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2017.09.010
更新日期:2017-11-01 00:00:00
abstract::Cancer's random, reversible, unstable transitions to "normal" structures imply their functional relation. Similar random, continuous, reversible oncogene "mutational transformation" also lacks a consistent hybrid. Positing cancer's "mutationally altered genotype" leads to medically foreign causes, qualities, inducers,...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(87)90155-1
更新日期:1987-06-01 00:00:00
abstract::Complex spinal reconstructive procedures are invariably associated with excessive intraoperative blood loss that significantly increases the risk of severe perioperative complications. In some cases, excessive hemorrhage is equivalent to estimated total blood volume. Unfortunately, widely exposed bony surfaces are not...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2005.02.012
更新日期:2005-01-01 00:00:00
abstract::As known, gamma-interferon-induced cell death in HeLa cells can be mediated via the recently identified protein kinase, death associated protein (DAP) kinase which is localized to the microfilament system of the cytoskeleton. However, the downstream or upstream effectors of DAP kinase remain uncertain. In the present ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1054/mehy.1999.0967
更新日期:2000-05-01 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::Recurrent Aphthous Stomatitis (RAS) is the most common ulcerative diseases of oral mucosa affecting an estimate of 20% of the world's population. Majority of the people affected by RAS are under 30 years of age. RAS is located on the lining (non-keratinized) oral mucosa, i.e. buccal mucosa, lateral side of the tongue,...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2020.110449
更新日期:2021-01-01 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::HIV may induce subclinical neuroendocrine dysfunctions in some seropositive patients and these dysfunctions may be one of the co-factors that determine the pathogenesis of AIDS. ...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/0306-9877(88)90090-4
更新日期:1988-09-01 00:00:00
abstract::Surgery for intractable affective illnesses has generated considerable controversy over the last century. Deep brain stimulation (DBS) has revolutionized neurosurgical practice, especially in the field of advanced Parkinson's disease and, more recently, in selected medical-refractory cases of obsessive-compulsive diso...
journal_title:Medical hypotheses
pub_type: 杂志文章
doi:10.1016/j.mehy.2005.07.036
更新日期:2006-01-01 00:00:00