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1.
Theor Biol Med Model ; 12: 9, 2015 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-26014131

RESUMO

BACKGROUND: Despite a vast literature, atherosclerosis and the associated ischemia/reperfusion injuries remain today in many ways a mystery. Why do atheromatous plaques make and store a supply of cholesterol and sulfate within the major arteries supplying the heart? Why are treatment programs aimed to suppress certain myocardial infarction risk factors, such as elevated serum homocysteine and inflammation, generally counterproductive? METHODS: Our methods are based on an extensive search of the literature in atherosclerotic cardiovascular disease as well as in the area of the unique properties of water, the role of biosulfates in the vascular wall, and the role of electromagnetic fields in vascular flow. Our investigation reveals a novel pathology linked to atherosclerosis that better explains the observed facts than the currently held popular view. RESULTS: We propose a novel theory that atherosclerosis can best be explained as being due to cholesterol sulfate deficiency. Furthermore, atheromatous plaques replenish the supply of cholesterol and sulfate to the microvasculature, by exploiting the inflammatory agent superoxide to derive sulfate from homocysteine and other sulfur sources. We argue that the sulfate anions attached to the glycosaminoglycans in the glycocalyx are essential in maintaining the structured water that is crucial for vascular endothelial health and erythrocyte mobility through capillaries. Sulfate depletion leads to cholesterol accumulation in atheromas, because its transport through water-based media depends on sulfurylation. We show that streaming potential induces nitric oxide (NO) release, and NO derivatives break down the extracellular matrix, redistributing sulfate to the microvasculature. We argue that low (less negative) zeta potential due to insufficient sulfate anions leads to hypertension and thrombosis, because these responses can increase streaming potential and induce nitric-oxide mediated vascular relaxation, promoting oxygen delivery. Our hypothesis is a parsimonious explanation of multiple features of atherosclerotic cardiovascular disease. CONCLUSIONS: If our interpretation is correct, then it would have a significant impact on how atherosclerosis is treated. We recommend a high intake of sulfur-containing foods as well as an avoidance of exposure to toxicants that may impair sulfate synthesis.


Assuntos
Aterosclerose/metabolismo , Ésteres do Colesterol/metabolismo , Modelos Biológicos , Circulação Sanguínea , Matriz Extracelular/metabolismo , Glutationa/metabolismo , Glicosaminoglicanos/metabolismo , Humanos , Inflamação/patologia , Síndrome , gama-Glutamiltransferase/metabolismo
2.
J Toxicol ; 2014: 491316, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25349607

RESUMO

Over the last 200 years, mining, smelting, and refining of aluminum (Al) in various forms have increasingly exposed living species to this naturally abundant metal. Because of its prevalence in the earth's crust, prior to its recent uses it was regarded as inert and therefore harmless. However, Al is invariably toxic to living systems and has no known beneficial role in any biological systems. Humans are increasingly exposed to Al from food, water, medicinals, vaccines, and cosmetics, as well as from industrial occupational exposure. Al disrupts biological self-ordering, energy transduction, and signaling systems, thus increasing biosemiotic entropy. Beginning with the biophysics of water, disruption progresses through the macromolecules that are crucial to living processes (DNAs, RNAs, proteoglycans, and proteins). It injures cells, circuits, and subsystems and can cause catastrophic failures ending in death. Al forms toxic complexes with other elements, such as fluorine, and interacts negatively with mercury, lead, and glyphosate. Al negatively impacts the central nervous system in all species that have been studied, including humans. Because of the global impacts of Al on water dynamics and biosemiotic systems, CNS disorders in humans are sensitive indicators of the Al toxicants to which we are being exposed.

3.
J Periodontol ; 80(6): 907-14, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19485820

RESUMO

BACKGROUND: This study examined conditions under which gingival crevicular blood (GCB) could be used to obtain a useful glucose reading to screen for undiagnosed diabetes during routine dental visits. METHODS: GCB and capillary finger-stick blood (CFB) glucose readings obtained with a glucometer were compared for 46 patients recruited from an urban university dental clinic. Study participants were divided into two groups based on probing depth or bleeding on probing (BOP) at the site of collection of the GCB sample. Group 1 participants had blood collected from sites with adequate BOP to obtain a sample without touching the tooth or gingival margin, whereas group 2 participants had blood collected from sites with little or no bleeding. For each group, Pearson correlations were calculated for glucose readings obtained using GCB and CFB samples, and the limits of agreement between the two samples were examined. RESULTS: For group 1 participants, correlations between CFB and GCB glucose readings were high (0.89), and the limits of agreement were acceptable (-27.1 to 29.7). By contrast, for participants in group 2, correlations between the glucose readings were lower (0.78), and limits of agreement were much broader (-25.1 to 80.5). CONCLUSION: GCB samples were suitable to screen for diabetes in persons with sufficient BOP to obtain a sample without touching the tooth or gingival margin (i.e., in patients having the basic clinical signs of gingivitis or periodontal disease).


Assuntos
Glicemia/análise , Coleta de Amostras Sanguíneas/métodos , Diabetes Mellitus/diagnóstico , Líquido do Sulco Gengival/química , Adulto , Idoso , Diabetes Mellitus/sangue , Estudos de Viabilidade , Feminino , Dedos/irrigação sanguínea , Gengiva/irrigação sanguínea , Hemorragia Gengival/sangue , Humanos , Masculino , Programas de Rastreamento/métodos , Pessoa de Meia-Idade , Perda da Inserção Periodontal/sangue , Bolsa Periodontal/sangue
4.
J Am Soc Echocardiogr ; 21(6): 776.e5-7, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-17931831

RESUMO

Intracardiac masses can be characterized as thrombus, vegetation, or tumor. An 83-year-old man had mobile spheric masses in the right atrium and ventricle. The lesions resolved with prolonged anticoagulation, suggesting thrombi as the origin. Three-dimensional echocardiography was useful in further characterizing the morphology and extent of the lesions.


Assuntos
Função do Átrio Direito , Átrios do Coração/patologia , Neoplasias Cardíacas/diagnóstico , Ventrículos do Coração/patologia , Embolia Pulmonar/tratamento farmacológico , Idoso de 80 Anos ou mais , Anticoagulantes/uso terapêutico , Ecocardiografia Tridimensional , Átrios do Coração/diagnóstico por imagem , Neoplasias Cardíacas/tratamento farmacológico , Neoplasias Cardíacas/patologia , Ventrículos do Coração/diagnóstico por imagem , Humanos , Masculino , Varfarina/uso terapêutico
5.
Am Heart J ; 151(2): 451-6, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16442913

RESUMO

BACKGROUND: The purpose of this report is to present a model of physicians in full-time clinical practice participating as investigators in multicenter clinical trials, sponsored by a pharmaceutical or medical device company. METHODS: This gas-exchange substudy was conducted as a pilot study to establish the feasibility of the 10-member EXERcise testing group of the Duke University Cooperative Cardiovascular Society (EXERDUCCS) consortium to perform a complex multicenter trial using cardiopulmonary exercise testing. An active interchange of information was established involving the principal investigator for the substudy, a dedicated full-time project coordinator, a medical director of the overall EXERDUCCS network site, the project coordinator for the sponsor, and all the participating EXERDUCCS investigators and coordinators. RESULTS: The sponsor set as a goal of enrollment of 6 subjects per site, and 8 of the 10 sites met this goal. As a result of the successful enrollment and completion of the study and substudy by the EXERDUCCS sites, the sponsor subsequently increased the payment stipends to the sites to compensate for the extra work and expense incurred. CONCLUSIONS: This cooperative experience accomplished several goals: (1) it allowed a complex clinical trial to be successfully completed in a time frame which would not have been possible using only single unconnected sites; (2) it educated the physician-investigators (and their personnel) in exercise cardiopulmonary; and (3) it prepared the sites for future clinical trials involving this methodology.


Assuntos
Teste de Esforço/métodos , Insuficiência Cardíaca , Estudos Multicêntricos como Assunto/métodos , Seleção de Pacientes , Ensaios Clínicos Controlados Aleatórios como Assunto/métodos , Pesquisadores/educação , Antagonistas de Receptores de Angiotensina , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Cardiologia/educação , Teste de Esforço/economia , Teste de Esforço/instrumentação , Estudos de Viabilidade , Insuficiência Cardíaca/tratamento farmacológico , Insuficiência Cardíaca/economia , Insuficiência Cardíaca/fisiopatologia , Humanos , Relações Interprofissionais , Projetos Piloto , Troca Gasosa Pulmonar , Ensaios Clínicos Controlados Aleatórios como Assunto/economia , Pesquisadores/organização & administração , Apoio à Pesquisa como Assunto , Sociedades Médicas , Universidades
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