Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 8 de 8
Filtrar
1.
Med Hypotheses ; 35(1): 32-7, 1991 May.
Artículo en Inglés | MEDLINE | ID: mdl-1921774

RESUMEN

Vitamin C is a reducing substance, an electron donor. When vitamin C donates its two high-energy electrons to scavenge free radicals, much of the resulting dehydroascorbate is re-reduced to vitamin C and therefore used repeatedly. Conventional wisdom is correct in that only small amounts of vitamin C are necessary for this function because of its repeated use. The point missed is that the limiting part in nonenzymatic free radical scavenging is the rate at which extra high-energy electrons are provided through NADH to re-reduce the vitamin C and other free radical scavengers. When ill, free radicals are formed at a rate faster than the high-energy electrons are made available. Doses of vitamin C as large as 1-10 g per 24 h do only limited good. However, when ascorbate is used in massive amounts, such as 30-200+ g per 24 h, these amounts directly provide the electrons necessary to quench the free radicals of almost any inflammation. Additionally, in high concentrations ascorbate reduces NAD(P)H and therefore can provide the high-energy electrons necessary to reduce the molecular oxygen used in the respiratory burst of phagocytes. In these functions, the ascorbate part is mostly wasted but the necessary high-energy electrons are provided in large amounts.


Asunto(s)
Ácido Ascórbico/metabolismo , Ácido Ascórbico/administración & dosificación , Transporte de Electrón/efectos de los fármacos , Depuradores de Radicales Libres , Glutatión/metabolismo , Humanos , Modelos Biológicos
3.
Med Hypotheses ; 21(3): 307-21, 1986 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-2879212

RESUMEN

I previously described that bowel tolerance (the amount that almost causes diarrhea) to oral ascorbic acid, increases in a person somewhat proportionally to the "toxicity" of his disease. Ascorbic acid ameliorates symptoms and sometimes cures certain diseases at high threshold levels near bowel tolerance. High concentrations of ascorbate cause the redox potential of the redox couple (ascorbate/dehydroascorbate, AA/DHA) to become reducing in diseased tissues. Allergic and sensitivity reactions are frequently ameliorated and sometimes completely blocked by massive doses of ascorbate. I now hypothesize that one mechanism in blocking of allergic symptoms is the reducing of the disulfide bonds between the chains in antibody molecules making their bonding antigen impossible. I further hypothesize that antibodies seek to match antigens only in areas where stray free radicals or a relatively oxidizing redox potential exists. The redox state of normal, healthy tissue does not allow for the bonding of antibodies to antigen. When antioxidant, free radical scavenging systems are overwhelmed, inflammatory, hypersensitivity, and "autoimmune" conditions may result.


Asunto(s)
Reacciones Antígeno-Anticuerpo/efectos de los fármacos , Ácido Ascórbico/uso terapéutico , Hipersensibilidad/tratamiento farmacológico , Animales , Ácido Ascórbico/farmacología , Enfermedades Autoinmunes/etiología , Linfocitos B/inmunología , Evolución Biológica , Disulfuros/metabolismo , Hipersensibilidad a las Drogas/tratamiento farmacológico , Hipersensibilidad a los Alimentos/tratamiento farmacológico , Antagonistas de los Receptores Histamínicos H1/farmacología , Humanos , Oxidación-Reducción , Neumonía por Pneumocystis/tratamiento farmacológico , Receptores de Antígenos de Linfocitos T/análisis
4.
Med Hypotheses ; 18(1): 61-77, 1985 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-4069036

RESUMEN

The amount of oral ascorbic acid that a patient can tolerate without diarrhea, increases somewhat proportionately to the "toxicity" of his disease. Clinically, in a disease ameliorated by ascorbate, there is a suppression of symptoms only with very high doses and approximately to that extent which a nonrate-limited, antioxidant free radical scavenger, might be expected to affect that disease process if all harmful free radicals and highly reactive oxidizing substances were quenched. In most pathologic processes, the rate at which free radicals and highly reactive oxidants are produced, exceeds the rate at which the ordinary rate-limited antioxidant free radical scavenging mechanisms can quench those free radicals and oxidants. When ascorbate acts as a scavenger, dehydroascorbate is formed; but if the ascorbate/dehydroascorbate (AA/DHA) ratio is kept high (the redox potential kept reducing) until the unstable dehydroascorbate undergoes hydrolysis or can be reduced back to ascorbate, the dehydroascorbate will do no harm. Since even at very high doses, ascorbate is virtually nontoxic, it may be given in the enormous doses necessary to quench almost all unwanted free radicals and oxidants. The wide spectrum of infectious diseases ameliorated by massive doses of ascorbate indicates some common pathologic processes in these diseases.


Asunto(s)
Antioxidantes , Ácido Ascórbico/uso terapéutico , Síndrome de Inmunodeficiencia Adquirida/terapia , Ácido Ascórbico/toxicidad , Deficiencia de Ácido Ascórbico/metabolismo , Diarrea/inducido químicamente , Relación Dosis-Respuesta a Droga , Radicales Libres , Deficiencia de Glucosafosfato Deshidrogenasa/tratamiento farmacológico , Humanos , Lactante , Cálculos Renales/tratamiento farmacológico , Cinética , Oxidación-Reducción , Escorbuto/etiología , Muerte Súbita del Lactante
5.
Med Hypotheses ; 14(4): 423-33, 1984 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-6238227

RESUMEN

My previous experience with the utilization of ascorbic acid in the treatment of viral diseases led me to hypothesize that ascorbate would be of value in the treatment of AIDS (acquired immune deficiency syndrome). Preliminary clinical evidence is that massive doses of ascorbate (50-200 grams per 24 hours) can suppress the symptoms of the disease and can markedly reduce the tendency for secondary infections. In combination with usual treatments for the secondary infections, large doses of ascorbate will often produce a clinical remission which shows every evidence of being prolonged if treatment is continued. This clinical remission is achieved despite continuing laboratory evidence of helper T-cell suppression. There may be a complete or partial destruction of the helper T-cells during an initial infection that does not necessitate a continuing toxicity from some source to maintain a permanent or prolonged helper T-cell suppression. However, it is possible ascorbate may prevent that destruction if used adequately during that prodrome period. Emphasis is put upon the recognition and treatment of the frequent intestinal parasites. Food and chemical sensitivities occur frequently in the AID syndrome and may aggravate symptoms considered to be part of the AID syndrome. A topical C-paste has been found very effective in the treatment of herpes simplex and, to a lesser extent, in the treatment of some Kaposi's lesions. Increasingly, clinical research on other methods of treating AIDS is being "contaminated" by patients taking ascorbate.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida/tratamiento farmacológico , Ácido Ascórbico/uso terapéutico , Administración Oral , Administración Tópica , Ácido Ascórbico/administración & dosificación , Candida albicans , Radicales Libres , Homosexualidad , Humanos , Intestinos/parasitología , Recuento de Leucocitos , Masculino , Automedicación , Linfocitos T Colaboradores-Inductores
6.
Med Hypotheses ; 7(11): 1359-76, 1981 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-7321921

RESUMEN

A method of utilizing vitamin C in amounts just short of the doses which produce diarrhea is described (TITRATING TO BOWEL TOLERANCE). The amount of oral ascorbic acid tolerated by a patient without producing diarrhea increase somewhat proportionately to the stress or toxicity of his disease. Bowel tolerance doses of ascorbic acid ameliorate the acute symptoms of many diseases. Lesser doses often have little effect on acute symptoms but assist the body in handling the stress of disease and may reduce the morbidity of the disease. However, if doses of ascorbate are not provided to satisfy this potential draw on the nutrient, first local tissues involved in the disease, then the blood, and then the body in general becomes deplete of ascorbate (ANASCORBEMIA and ACUTE INDUCED SCURVY). The patient is thereby put at risk for complications of metabolic processes known to be dependent upon ascorbate.


Asunto(s)
Ácido Ascórbico/administración & dosificación , Diarrea/inducido químicamente , Intestino Grueso/efectos de los fármacos , Administración Oral , Adulto , Ácido Ascórbico/sangre , Ácido Ascórbico/uso terapéutico , Tolerancia a Medicamentos , Humanos , Escorbuto/tratamiento farmacológico , Estrés Fisiológico , Procedimientos Quirúrgicos Operativos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA