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1.
Bull Exp Biol Med ; 174(3): 365-369, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36729327

RESUMEN

Liver morphology, intensity of apoptosis, and activity of xenobiotic metabolism enzymes were studied in a chronic model experiment in rats receiving a mixture of 6 pesticides against the background of life-long diets with adequate and insufficient supply of water-soluble vitamins. The dose of each pesticide in the mixture did not exceed the acceptable daily intake (1 ADI). It was found that chronic exposure to low doses of anthropogenic toxicants in combination with permanent vitamin deficiency provokes a number of liver changes, such as increased apoptosis activity, cytochrome P450 system depletion, steatosis, and inflammatory infiltration, which is a potential health risk factor.


Asunto(s)
Avitaminosis , Hígado , Ratas , Animales , Hígado/metabolismo , Avitaminosis/metabolismo , Vitaminas , Sistema Enzimático del Citocromo P-450/metabolismo , Biomarcadores/metabolismo
2.
Cell Mol Biol (Noisy-le-grand) ; 68(7): 101-106, 2022 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-36495511

RESUMEN

Ulcerative colitis (UC) is a chronic inflammatory disease. Studies in China and foreign countries have shown that vitamins have anti-inflammation and immunoregulation functions in patients with UC, but the specific mechanism is not yet clear. In this study, the levels of inflammatory cytokines in the intestinal mucosa, serum inflammatory indexes, oxidative stress indexes and immune-related indexes were detected, and their correlations with vitamin deficiency and clinical significance were discussed. Enzyme-linked immunosorbent assay (ELISA) was adopted to detect the serum level of 25-hydroxyvitamin D3, immunohistochemistry was applied to examine the expression of inflammatory cytokines in the intestinal mucosa, serum inflammatory indexes, oxidative stress indexes and immune-related indexes were measured, and their correlations were analyzed. Inflammatory and oxidative stress indexes in the UC group were notably higher than in the control group. The Vitamin deficiency group had more inflammatory cytokines than the normal vitamin group. Oxidative stress indexes such as superoxide dismutase (SOD) and malondialdehyde (MDA) in the vitamin deficiency group were significantly different from those in the normal vitamin group, but no difference was found in myeloperoxidase (MPO). Immune-related indexes, complement 3 (C3) and interferon-gamma (IFN-γ), in the normal vitamin group were higher than those in the vitamin deficiency group. Besides, interleukin-4 (IL-4) (r=-0.37, p=0.04) and IL-1ß (r=-0.31, p=0.04) had significant correlations with vitamins. Vitamins in patients with UC have significant correlations with inflammatory responses in vivo, which can be used to predict inflammatory responses in vivo and have strong clinical significance. Vitamins are also related to oxidative stresses to some extent but have little effect on immune-related indexes.


Asunto(s)
Avitaminosis , Colitis Ulcerosa , Humanos , Citocinas/metabolismo , Mucosa Intestinal/metabolismo , Estrés Oxidativo , Inflamación/metabolismo , Avitaminosis/metabolismo , Vitaminas/metabolismo
3.
Proc Natl Acad Sci U S A ; 115(43): 10836-10844, 2018 10 23.
Artículo en Inglés | MEDLINE | ID: mdl-30322941

RESUMEN

It is proposed that proteins/enzymes be classified into two classes according to their essentiality for immediate survival/reproduction and their function in long-term health: that is, survival proteins versus longevity proteins. As proposed by the triage theory, a modest deficiency of one of the nutrients/cofactors triggers a built-in rationing mechanism that favors the proteins needed for immediate survival and reproduction (survival proteins) while sacrificing those needed to protect against future damage (longevity proteins). Impairment of the function of longevity proteins results in an insidious acceleration of the risk of diseases associated with aging. I also propose that nutrients required for the function of longevity proteins constitute a class of vitamins that are here named "longevity vitamins." I suggest that many such nutrients play a dual role for both survival and longevity. The evidence for classifying taurine as a conditional vitamin, and the following 10 compounds as putative longevity vitamins, is reviewed: the fungal antioxidant ergothioneine; the bacterial metabolites pyrroloquinoline quinone (PQQ) and queuine; and the plant antioxidant carotenoids lutein, zeaxanthin, lycopene, α- and ß-carotene, ß-cryptoxanthin, and the marine carotenoid astaxanthin. Because nutrient deficiencies are highly prevalent in the United States (and elsewhere), appropriate supplementation and/or an improved diet could reduce much of the consequent risk of chronic disease and premature aging.


Asunto(s)
Avitaminosis/dietoterapia , Avitaminosis/metabolismo , Proteínas en la Dieta , Longevidad , Modelos Biológicos , Vitaminas , Animales , Avitaminosis/epidemiología , Humanos , Estados Unidos/epidemiología
4.
Muscle Nerve ; 62(1): 13-29, 2020 07.
Artículo en Inglés | MEDLINE | ID: mdl-31837157

RESUMEN

Neuropathies associated with nutritional deficiencies are routinely encountered by the practicing neurologist. Although these neuropathies assume different patterns, most are length-dependent, sensory axonopathies. Cobalamin deficiency neuropathy is the exception, often presenting with a non-length-dependent sensory neuropathy. Patients with cobalamin and copper deficiency neuropathy characteristically have concomitant myelopathy, whereas vitamin E deficiency is uniquely associated with a spinocerebellar syndrome. In contrast to those nutrients for which deficiencies produce neuropathies, pyridoxine toxicity results in a non-length-dependent sensory neuronopathy. Deficiencies occur in the context of malnutrition, malabsorption, increased nutrient loss (such as with dialysis), autoimmune conditions such as pernicious anemia, and with certain drugs that inhibit nutrient absorption. When promptly identified, therapeutic nutrient supplementation may result in stabilization or improvement of these neuropathies.


Asunto(s)
Avitaminosis/diagnóstico , Avitaminosis/metabolismo , Suplementos Dietéticos , Estado Nutricional/fisiología , Enfermedades del Sistema Nervioso Periférico/diagnóstico , Enfermedades del Sistema Nervioso Periférico/metabolismo , Anemia Perniciosa/diagnóstico , Anemia Perniciosa/tratamiento farmacológico , Anemia Perniciosa/metabolismo , Avitaminosis/tratamiento farmacológico , Humanos , Estado Nutricional/efectos de los fármacos , Enfermedades del Sistema Nervioso Periférico/tratamiento farmacológico , Deficiencia de Tiamina/diagnóstico , Deficiencia de Tiamina/tratamiento farmacológico , Deficiencia de Tiamina/metabolismo , Deficiencia de Vitamina B 12/diagnóstico , Deficiencia de Vitamina B 12/tratamiento farmacológico , Deficiencia de Vitamina B 12/metabolismo , Vitaminas/administración & dosificación
5.
Int J Mol Sci ; 20(22)2019 Nov 11.
Artículo en Inglés | MEDLINE | ID: mdl-31717934

RESUMEN

Heart failure (HF) is a chronic condition with many imbalances, including nutritional issues. Next to sarcopenia and cachexia which are clinically evident, micronutrient deficiency is also present in HF. It is involved in HF pathophysiology and has prognostic implications. In general, most widely known micronutrients are depleted in HF, which is associated with symptoms and adverse outcomes. Nutritional intake is important but is not the only factor reducing the micronutrient availability for bodily processes, because absorption, distribution, and patient comorbidity may play a major role. In this context, interventional studies with parenteral micronutrient supplementation provide evidence that normalization of micronutrients is associated with improvement in physical performance and quality of life. Outcome studies are underway and should be reported in the following years.


Asunto(s)
Avitaminosis/metabolismo , Insuficiencia Cardíaca/metabolismo , Oligoelementos/metabolismo , Vitaminas/metabolismo , Avitaminosis/complicaciones , Avitaminosis/tratamiento farmacológico , Insuficiencia Cardíaca/complicaciones , Humanos , Oligoelementos/deficiencia
6.
Eksp Klin Gastroenterol ; (7): 86-94, 2016.
Artículo en Ruso | MEDLINE | ID: mdl-30284430

RESUMEN

In a review article considers issues of efficiency and tactics of the purpose of fat-soluble vitamins, as in cholestatic and noncholestatic liver disease, as well as water-soluble vitamins, particularly vitamin C cholelithiasis. Oxidative stress due to chronic inflammation is one of the major conversion mechanisms of liver fibrosis in cirrhosis. The imbalance between production of reactive oxygen species and antioxidant defense causes a number of pathophysiological changes in the liver, including activation of hepatic stellate cells. The carriers of the I148M PNPLA3 mutation was not observed concentration reduction in liver vitamin A with increasing severity of the disease, but the observed decrease in the level of circulating retinyl palmitate and retinol-binding protein. To the appointment of vitamin A in liver disease should be approached with caution. Hypervitaminosis A leads to accelerated liver fibrosis and stimulates carcinogenesis. Currently actively studied the possibility of using vitamin E as an antioxidant, in patients with non-alcoholic fatty liver disease. His presence in the membranes phospholipid bilayer allows cells to prevent non-enzymatic oxidation of cell components by free radicals. Vitamin E can suppress the profibrotic processes. In patients with chronic cholestatic liver disease is common, vitamin K deficiency, even when administered, and is associated with the degree of cholestasis and severity of disease. The vitamin D deficiency, liver disease is also associated with the severity of disease correlated with the severity of liver failure and infectious complications. Vitamin D is an independent prognostic parameter for mortality risk in patients with liver cirrhosis.


Asunto(s)
Avitaminosis , Lipasa , Hepatopatías , Proteínas de la Membrana , Mutación Missense , Vitaminas/metabolismo , Sustitución de Aminoácidos , Animales , Avitaminosis/genética , Avitaminosis/metabolismo , Avitaminosis/patología , Humanos , Lipasa/genética , Lipasa/metabolismo , Hepatopatías/genética , Hepatopatías/metabolismo , Hepatopatías/patología , Proteínas de la Membrana/genética , Proteínas de la Membrana/metabolismo , Vitaminas/genética
7.
Gastroenterology ; 144(5): 945-955.e6; quiz e14-5, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23415802

RESUMEN

BACKGROUND & AIMS: The final step in bile acid synthesis involves conjugation with glycine and taurine, which promotes a high intraluminal micellar concentration to facilitate lipid absorption. We investigated the clinical, biochemical, molecular, and morphologic features of a genetic defect in bile acid conjugation in 10 pediatric patients with fat-soluble vitamin deficiency, some with growth failure or transient neonatal cholestatic hepatitis. METHODS: We identified the genetic defect that causes this disorder using mass spectrometry analysis of urine, bile, and serum samples and sequence analysis of the genes encoding bile acid-CoA:amino acid N-acyltransferase (BAAT) and bile acid-CoA ligase (SLC27A5). RESULTS: Levels of urinary bile acids were increased (432 ± 248 µmol/L) and predominantly excreted in unconjugated forms (79.4% ± 3.9%) and as sulfates and glucuronides. Glycine or taurine conjugates were absent in the urine, bile, and serum. Unconjugated bile acids accounted for 95.7% ± 5.8% of the bile acids in duodenal bile, with cholic acid accounting for 82.4% ± 5.5% of the total. Duodenal bile acid concentrations were 12.1 ± 5.9 mmol/L, which is too low for efficient lipid absorption. The biochemical profile was consistent with defective bile acid amidation. Molecular analysis of BAAT confirmed 4 different homozygous mutations in 8 patients tested. CONCLUSIONS: Based on a study of 10 pediatric patients, genetic defects that disrupt bile acid amidation cause fat-soluble vitamin deficiency and growth failure, indicating the importance of bile acid conjugation in lipid absorption. Some patients developed liver disease with features of a cholangiopathy. These findings indicate that patients with idiopathic neonatal cholestasis or later onset of unexplained fat-soluble vitamin deficiency should be screened for defects in bile acid conjugation.


Asunto(s)
Avitaminosis/genética , Ácidos y Sales Biliares/metabolismo , Coenzima A Ligasas/genética , ADN/genética , Predisposición Genética a la Enfermedad , Mutación Missense , Aciltransferasas/genética , Aciltransferasas/metabolismo , Avitaminosis/metabolismo , Avitaminosis/patología , Biopsia , Niño , Preescolar , Coenzima A Ligasas/metabolismo , Análisis Mutacional de ADN , Proteínas de Transporte de Ácidos Grasos/genética , Proteínas de Transporte de Ácidos Grasos/metabolismo , Femenino , Homocigoto , Humanos , Lactante , Hígado/patología , Masculino , Espectrometría de Masas
8.
Vopr Pitan ; 83(4): 29-41, 2014.
Artículo en Ruso | MEDLINE | ID: mdl-25549472

RESUMEN

The effect of 5% dietary wheat bran (WB) on the correction of combined vitamin deficiency by two doses of vitamins (physiological and enhanced) has been analyzed using a rat model (8 groups, n = 8/group). Vitamin deficiency in male weanling Wistar rats (58.1 ± 0.5 g) was induced by 5-fold reduction of vitamin mixture amount in the feed and complete vitamin E, B1 and B2 exclusion from the mixture for 30 days, then deficit was corrected within 5 days. Rats from control group were fed a complete semisynthetic diet containing microcrystalline cellulose 2%. Vitamin deficient diet for 35 days resulted in reduced (p < 0.05) levels of vitamin A in the liver by 25 fold, vitamin E and B1--2.0-2.3 fold, vitamin B2--by 40%, 25(OH)D blood plasma concentration--by 21% compared with the control. Feed consumption of the animals treated with vitamin deficient diet and WB was higher by 43% than in rats with vitamin deficit. Their rate of weight occupied the intermediate position between the rates of weight in deficit and in control animals, and they could not serve a full control to evaluate the WB impact on vitamin sufficiency. After filling the vitamin diet content to an adequate level vitamin E liver content was fully restored. To restore vitamins B1 and B2 liver level higher doses of vitamins (120-160% of adequate content) were required, and to restore the reduced levels of vitamin A in rat liver even 2-fold increased dose of vitamin A was insufficient. The diet enrichment with WB had no effect on vitamin B1 and B2 liver content, regardless of the amount of vitamins in the diet. Adding fiber to the diet of animals adequately provided with vitamins resulted in significantly 1,3-fold increase of 25(OH)D blood plasma concentration and a slight but significant decrease of α-tocopherol liver level by 16% as compared to rats not receiving WB. The enrichment of rat diet with dietary fibers worsened restoration of the reduced vitamin E status not only by filling vitamin content in the diet to an adequate level, but also by using 2-fold enhanced dose of vitamin. Within 5 days deficiency of vitamins A, B1, B2 was not eliminated with increasing vitamin diet content to an adequate level. Higher doses of vitamins are needed for the complete correction of vitamin status. The addition of vitamins to an adequate level was sufficient to normalize the elevated liver levels of MDA in rats with combined vitamin deficiency that may be associated with vitamin E status improvement. The diet enrichment with fiber did not affect on the intensity of lipid peroxidation in rat liver regardless of their provision with vitamins.


Asunto(s)
Avitaminosis/tratamiento farmacológico , Peso Corporal/efectos de los fármacos , Fibras de la Dieta/uso terapéutico , Vitaminas/uso terapéutico , Animales , Avitaminosis/sangre , Avitaminosis/metabolismo , Fibras de la Dieta/administración & dosificación , Modelos Animales de Enfermedad , Relación Dosis-Respuesta a Droga , Hígado/metabolismo , Masculino , Ratas Wistar , Vitaminas/administración & dosificación , Vitaminas/sangre , Vitaminas/metabolismo
9.
Vopr Pitan ; 83(1): 33-40, 2014.
Artículo en Ruso | MEDLINE | ID: mdl-25059054

RESUMEN

The effect of dietary fibers (DF) of wheat bran on hepatocyte apoptosis in rats adequately provided with vitamins or insufficiently supplied with vitamins has been investigated. 48 male Wistar rats (initial body mass--58.1 +/- 0.5 g) were randomly divided into 6 groups and fed with semi-synthetic diet, containing 100% or 20% of vitamin mixture (Vit) with or without addition of DF in the dose corresponding to the upper allowable level of its consumption (5% of diet mass) for 4 weeks. The animals of the 1 group received 100% of vitamin mixture (100% Vit); 2 group--100% Vit + DF; 3 group--20% of vitamin mixture with full exclusion of vitamins E, B1 and B2 (20% Vit); 4 group--20% of vitamin mixture and DF (20% Vit + DF). The next 5 days rats from vitamin-deficient groups were fed with diets supplemented with 80% of vitamins from their content in control group: (5 group--20% Vit + 80% Vit; 6 group--20% Vit + DF + 80% Vit). The suspension of hepatocytes was received by Becton Dickinson Medimachine System (USA). Hepatocyte apoptosis was assessed by the method of flow cytometry using Beckman Coulter FC 500 (USA) cytometer by stained cells with Annexin V-FITC/ 7-Amino-Actinomycin D Kit (Beckman Coulter, USA). In rats fed complete semi-synthetic diet supplemented with DF (100% Vit + DF) the hepatocyte apoptosis was higher by 22% (p < 0.10) than that in rats of control group (4.99 +/- 1.82%). In rats fed diets with low vitamin content (groups: 20% Vit and 20% Vit + DF) the hepatocyte apoptosis was significantly higher (p < 0.05) than that in the control group and reached 7.03 +/- 1.74 and 7.26 +/- 1.13% accordingly. Normalization of vitamin content in the diets of rats from deficient groups during 5 days had no effect on the severity of apoptosis regardless from presence (8.02 +/- 2.18%) or absence of the DF (8.04 +/- 1.66%). Adding DF in dose corresponding to the upper allowable level of consumption, on the background of adequate vitamin content in the diet is accompanied by a tendency to develop hepatocyte apoptosis, which may be the result of a direct action of short chain fatty acids generated from the DF and the deterioration of vitamin sufficiency.


Asunto(s)
Apoptosis/efectos de los fármacos , Avitaminosis/metabolismo , Fibras de la Dieta/farmacología , Hepatocitos/metabolismo , Animales , Avitaminosis/patología , Células Cultivadas , Hepatocitos/patología , Masculino , Ratas , Ratas Wistar , Vitaminas/farmacología
10.
Bull Exp Biol Med ; 154(4): 445-8, 2013 Feb.
Artículo en Inglés, Ruso | MEDLINE | ID: mdl-23486577

RESUMEN

In rats with profound vitamin deficiency, blood plasma level of triglycerides significantly decreased by 1.6 times, potassium ions by 5%, uric acid by 23%, ALT and AST by 1.4 times, while the levels of glucose increased by 32%, iron by 31%, urea by 58%, and alkaline phosphatase by 19%. Plasma level of phosphorus tended to decrease and ionized calcium concentration tended to increase. Severe deficiency of all vitamins is accompanied by pronounced accumulation of MDA in the plasma and liver together with simultaneous increase in the level of coenzyme Q10 by 4.6 times and decrease in vitamin C content by 21.4% in the rat liver compared to the control. It was found that severe combined deficiency of vitamins for 4 weeks produced considerable multidirectional alterations in diagnostically important metabolic parameters in rat plasma.


Asunto(s)
Antioxidantes/metabolismo , Avitaminosis/sangre , Animales , Ácido Ascórbico/sangre , Ácido Ascórbico/metabolismo , Avitaminosis/metabolismo , Peroxidación de Lípido , Hígado/metabolismo , Masculino , Ratas , Ratas Wistar , Ubiquinona/análogos & derivados , Ubiquinona/sangre , Ubiquinona/metabolismo
11.
Vopr Pitan ; 82(2): 66-9, 2013.
Artículo en Ruso | MEDLINE | ID: mdl-24000704

RESUMEN

The examination was carried out on male Wistar rats with an initial weight 97-121 g. Influence of vitamin provision and composition of fat component in semisynthetic diet on the condition of lactoflora population of intestine were studied. The deficiency of vitamins was caused by fivefold decrease of amount of vitamin mixture added to the feed and by elimination of vitamin E from this mixture. The modification of fat component was made by substitution of sunflower oil for linseed oil in equal amount (the ratio of vegetable oil and animal fat (lard) was 1:1). Duration of the first phase of the experiment was 28 days. Vitamin deficiency in rats, receiving feed with sunflower oil, was accompanied by significant decrease of vitamins A, E, B1 and B2 in the liver, but did not affect the quantity of lactobacilli in caecum content of rats. Enrichment of the diet deficient in vitamins with polyunsaturated omega 3 fatty acids was associated with a statistically significant increase in number of lactobacilli in the intestine compared with the control group (9.78+/-0.08 opposite 8.82+/-0.33 Ig CFU/g, p=0.018) and group of rats with vitamin deficiency (9.03+/-0.18 Ig CFU/g p = 0.006). On the second stage, replenishment of vitamin deficiency was carried out in the next 14 days by increasing the amount of vitamin mixture to 70 and 200% of vitamin content from a diet in control group. The replenishment has not affected the number of caecum lactobacilli irrespectively of the dose of vitamins and fatty component.


Asunto(s)
Avitaminosis/metabolismo , Avitaminosis/microbiología , Colon/microbiología , Grasas de la Dieta/farmacología , Lactobacillus/crecimiento & desarrollo , Vitaminas/metabolismo , Animales , Masculino , Ratas , Ratas Wistar , Vitaminas/farmacología
12.
Vopr Pitan ; 82(3): 11-8, 2013.
Artículo en Ruso | MEDLINE | ID: mdl-24006747

RESUMEN

The central and local stress limiting systems, including the antioxidant defense system involved in defending the organism at the cellular and systemic levels from excess activation response to stress influence, leading to damaging effects. The development of stress, regardless of its nature [cold, increased physical activity, aging, the development of many pathologies (cardiovascular, neurodegenerative diseases, diseases of the gastrointestinal tract, ischemia, the effects of burns), immobilization, hypobaric hypoxia, hyperoxia, radiation effects etc.] leads to a deterioration of the vitamin status (vitamins E, A, C). Damaging effect on the antioxidant defense system is more pronounced compared to the stress response in animals with an isolated deficiency of vitamins C, A, E, B1 or B6 and the combined vitamins deficiency in the diet. Addition missing vitamin or vitamins restores the performance of antioxidant system. Thus, the role of vitamins in adaptation to stressors is evident. However, vitamins C, E and beta-carotene in high doses, significantly higher than the physiological needs of the organism, may be not only antioxidants, but may have also prooxidant properties. Perhaps this explains the lack of positive effects of antioxidant vitamins used in extreme doses for a long time described in some publications. There is no doubt that to justify the current optimal doses of antioxidant vitamins and other dietary antioxidants specially-designed studies, including biochemical testing of initial vitamin and antioxidant status of the organism, as well as monitoring their change over time are required.


Asunto(s)
Antioxidantes/metabolismo , Estrés Oxidativo , Vitaminas/metabolismo , Animales , Antioxidantes/uso terapéutico , Avitaminosis/tratamiento farmacológico , Avitaminosis/metabolismo , Suplementos Dietéticos , Humanos , Vitaminas/uso terapéutico
13.
Semin Neurol ; 32(2): 123-36, 2012 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-22961187

RESUMEN

The myelopathies discussed in this article have an underlying metabolic or toxic etiology. They have many clinical, electrophysiologic, and neuropathologic similarities. Preferential involvement of the dorsal columns and/or corticospinal tracts is commonly seen. Variable degrees of peripheral nerve and/or optic nerve involvement may be present. In the presence of clinical or electrophysiologic evidence of peripheral nerve involvement, the term myeloneuropathy is commonly used. The metabolic and toxic myelopathies discussed here are divided into three categories: disorders due to an identified nutrient deficiency such as the subacute combined degeneration of cobalamin/vitamin B12 or copper deficiency, disorders that have a geographical predilection and are due to a suspected toxin such as lathyrism, and disorders due to a possible toxin but without a geographical predilection such as hepatic myelopathy (Table 1).


Asunto(s)
Encefalopatías Metabólicas/inducido químicamente , Encefalopatías Metabólicas/fisiopatología , Neurotoxinas/envenenamiento , Enfermedades de la Médula Espinal/inducido químicamente , Enfermedades de la Médula Espinal/fisiopatología , Animales , Avitaminosis/metabolismo , Avitaminosis/fisiopatología , Encefalopatías Metabólicas/metabolismo , Humanos , Intoxicación por Plantas/metabolismo , Intoxicación por Plantas/fisiopatología , Enfermedades de la Médula Espinal/metabolismo
14.
Int J Food Sci Nutr ; 63(5): 548-52, 2012 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22165994

RESUMEN

Is well known that obesity has increased significantly in recent times and therefore many dietary supplements, synthetic or natural, have been proposed in order to prevent and/or to treat obesity or overweight. Chitosan, a polysaccharide with ability to act as a carrier and to absorb fat, has been used for this purpose. However, interactions with other molecules present in the body may also occur and, therefore, the purpose of this study was to evaluate interactions of chitosan with vitamin B12. Spectroscopic properties of vitamin B12 (acid aqueous solution) were monitored in the absence and the presence of chitosan in order to evaluate possible interactions between the two. Results showed that the rigid micro-environment generated by chitosan solution modifies the photophysical properties of vitamin B12. Thus, chitosan is able to eliminate vitamin B12 and, based on this information, some care must be taken during prolonged treatment with chitosan.


Asunto(s)
Fármacos Antiobesidad/efectos adversos , Avitaminosis/etiología , Quitosano/efectos adversos , Suplementos Dietéticos/efectos adversos , Obesidad/metabolismo , Procesos Fotoquímicos , Vitamina B 12/metabolismo , Fármacos Antiobesidad/química , Fármacos Antiobesidad/uso terapéutico , Avitaminosis/metabolismo , Avitaminosis/prevención & control , Quitosano/química , Quitosano/uso terapéutico , Obesidad/tratamiento farmacológico , Vitamina B 12/química
15.
Vopr Pitan ; 81(2): 28-33, 2012.
Artículo en Ruso | MEDLINE | ID: mdl-22774475

RESUMEN

The activity of xenobiotic-metabolizing enzymes was studied in the liver of male Wistar rats, which were fed for 4 weeks diets, containing 100 (control), 50 and 20% of vitamin adequate level. Moderate (50%) polyvitamin deficiency increased activity of EROD (by 13%), MROD (by 34%; p<0,05), 4-nitrophenol hydroxylase (by 16%), 6beta-testosterone hydroxylase (by 17%), UDP-glucuronosyle transferase (by 26%, p<0,05) and quinone reductase (by 55%, p<0,05). Deep (20%) polyvitamin deficiency decreased in liver activity of MROD (to 78% of control level, p<0,05), 4-nitrophenol hydroxylase (to 74%, p<0,05), heme oxygenase-1 (to 83%, p<0,05) and quinone reductase (to 60%, p<0,05). At the same time a 22% increase in the UDP-glucuronosyle transferase activity compared to the control group was found; activities of EROD, PROD, 6beta-testosterone hydroxylase and the total activity of glutathione S-transferase were unchanged. Deep polyvitamin deficiency had no significant effect on CYP1A1 mRNA and AhR mRNA level, whereas the expression of CYP1A2 mRNA and CYP3A1 mRNA were decreased to 62 and 79%, respectively, as compared with control.


Asunto(s)
Antioxidantes/metabolismo , Avitaminosis/enzimología , Sistema Enzimático del Citocromo P-450/metabolismo , Hígado/enzimología , Xenobióticos/metabolismo , Alimentación Animal , Animales , Avitaminosis/metabolismo , Sistema Enzimático del Citocromo P-450/sangre , Sistema Enzimático del Citocromo P-450/genética , Modelos Animales de Enfermedad , Expresión Génica , Peroxidación de Lípido , Hígado/metabolismo , Masculino , Ratas , Ratas Wistar , Xenobióticos/farmacocinética
16.
Vopr Pitan ; 81(3): 52-7, 2012.
Artículo en Ruso | MEDLINE | ID: mdl-22888672

RESUMEN

The influence of low (1%) and high (31%) diet fat content (sunflower-seed oil and lard 1:1 at a ratio of 1:1) on vitamin A, E, B1 and B2 status of growing Wistar rats (8 rats per group) with initial body weight 80-100 g has been investigated. The semi-synthetic diet contained vitamin mixture in doses covering the physiological requirement of these animals. The increase of fat content (31%) in the diet due to the presence of vitamin E in sunflower-seed oil automatically lead to 1,7-fold increase consumption of this vitamin compared to the control group. Diet fat content did not affect the level of vitamins B1 and B2 in rat liver. Excessive intake of fat and vitamin E for 6 weeks did not influence on the content of blood plasma vitamin E and rat liver vitamin A occurs at the same time, while significant 1,9 fold elevation of liver vitamin E level and 26 per cent increase of blood plasma vitamin A concentration. The almost complete exclusion of fat from the diet had no effect on blood plasma level of alpha-tocopherol and retinol, but resulted in a significant decrease of vitamins A and E content in rat liver by 40 per cent, indicating a deterioration of sufficiency with these fat-soluble vitamins. The analysis of the results obtained in this investigation and literature data have suggested that under excessive as well as under decreased consumption of fat there is a risk of the development of polyhypovitaminosis. Vitamin complex supplementation is required to prevent a possible worsening of vitamin status under diets with modified fatty component.


Asunto(s)
Grasas de la Dieta , Riboflavina/metabolismo , Tiamina/metabolismo , Vitamina A/metabolismo , Vitamina E/metabolismo , Alimentación Animal , Animales , Avitaminosis/etiología , Avitaminosis/metabolismo , Avitaminosis/prevención & control , Grasas de la Dieta/administración & dosificación , Grasas de la Dieta/efectos adversos , Hígado/efectos de los fármacos , Hígado/metabolismo , Masculino , Ratas , Ratas Wistar , Riboflavina/administración & dosificación , Riboflavina/sangre , Tiamina/administración & dosificación , Tiamina/sangre , Vitamina A/administración & dosificación , Vitamina A/sangre , Vitamina E/administración & dosificación , Vitamina E/sangre
17.
J Biol Regul Homeost Agents ; 25(2): 163-8, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21880204

RESUMEN

Conditions of stress and anxiety have complex interactions with insufficient vitamin intake and malnutrition. This study, based on literature research in Medline, analyzes the inter-relationship between vitamins and stress. This report concerns a number of vitamins that have been receiving much attention in earlier reviews of the literature, for their potential to protect against stress-related events, and focus is placed upon recent findings.


Asunto(s)
Avitaminosis/psicología , Neoplasias/psicología , Estrés Psicológico/metabolismo , Avitaminosis/inmunología , Avitaminosis/metabolismo , Avitaminosis/fisiopatología , Humanos , Tolerancia Inmunológica , Desnutrición/metabolismo , Desnutrición/psicología , Neoplasias/inmunología , Neoplasias/metabolismo , Neoplasias/fisiopatología , Estrés Psicológico/inmunología , Estrés Psicológico/fisiopatología , Estrés Psicológico/psicología , Vitaminas/metabolismo
18.
J Pediatr Gastroenterol Nutr ; 50(1): 61-6, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19915491

RESUMEN

OBJECTIVE: We studied the clinical features of children with 3beta-hydroxy-Delta 5-C27-steroid dehydrogenase (3beta-HSDH) deficiency presenting to King's College and Great Ormond Street hospitals between 1989 and 2005. The diagnosis was made biochemically by detection of sulphated dihydroxycholenoic acids and trihydroxycholenoic acids in urine by fast atom bombardment mass spectrometry or electrospray ionisation tandem mass spectrophotometry and a plasma bile acid profile showing absent or low cholic and chenodeoxycholic acid levels and high concentrations of 3beta-7 alpha-dihydroxy-5-cholenoic acid and 3beta-7 alpha-12 alpha-trihydroxy-5-cholenoic acid. RESULTS: Eighteen children (12 male) with 3beta-HSDH deficiency were identified and diagnosed at a median age of 1.35 years (range 8 weeks-11 years). The presenting features included neonatal cholestasis (n = 11), rickets (n = 8, 1 of whom also had hypocalcaemic tetany, seizures, and normal liver biochemical markers), hepatomegaly (n = 7), pruritus (n = 3), and steatorrhoea and failure to thrive (n = 3). Ten children had low serum 25-OH vitamin D levels, of whom 8 also had low vitamin E and 6 had low vitamin A serum levels. Liver histology showed giant cell change and hepatocyte disarray in all with added features of cholestasis in 11, bridging fibrosis in 6, micronodular cirrhosis in 1, fatty change in 1, and active lobular and portal inflammation in 1. Five patients were treated with cholic acid and chenodeoxycholic acid (7 mg x kg(-1) x day(-1) of each), 7 with chenodeoxycholic acid only (7-18 mg x kg(-1) x day(-1)), and 1 with cholic acid (8 mg x kg(-1) x day(-1)) only. Repeated liver biopsies performed in 4 patients 6 months after starting replacement therapy showed improved histological changes. Three children died untreated before 5 years of age. After a median follow-up of 5.5 years (range 1-17 years) 12 out of 13 treated children have no clinical signs of liver disease or of fat-soluble vitamin deficiency. CONCLUSIONS: 3beta-HSDH deficiency is a rare inborn error of metabolism with diverse clinical features. Early replacement treatment leads to clinical and biochemical control and prevents chronic liver and bone disease, at least in the medium term.


Asunto(s)
3-Hidroxiesteroide Deshidrogenasas/deficiencia , Ácidos y Sales Biliares/orina , Errores Congénitos del Metabolismo Esteroideo/complicaciones , 3-Hidroxiesteroide Deshidrogenasas/genética , 3-Hidroxiesteroide Deshidrogenasas/metabolismo , Avitaminosis/etiología , Avitaminosis/genética , Avitaminosis/metabolismo , Ácido Quenodesoxicólico/uso terapéutico , Niño , Preescolar , Colestasis/etiología , Ácido Cólico/uso terapéutico , Femenino , Humanos , Lactante , Hígado/patología , Masculino , Espectrometría de Masa por Ionización de Electrospray , Esteatorrea/etiología , Errores Congénitos del Metabolismo Esteroideo/enzimología , Errores Congénitos del Metabolismo Esteroideo/patología
19.
Toxins (Basel) ; 12(3)2020 02 25.
Artículo en Inglés | MEDLINE | ID: mdl-32106499

RESUMEN

Cardiovascular (CV) disease is highly prevalent in the population with chronic kidney disease (CKD), where the risk of CV death in early stages far exceeds the risk of progression to dialysis. The presence of chronic kidney disease-mineral and bone disorder (CKD-MBD) has shown a strong correlation with CV events and mortality. As a non-atheromatous process, it could be partially explained why standard CV disease-modifying drugs do not provide such an impact on CV mortality in CKD as observed in the general population. We summarize the potential association of CV comorbidities with the older (parathyroid hormone, phosphate) and newer (FGF23, Klotho, sclerostin) CKD-MBD biomarkers.


Asunto(s)
Enfermedades Cardiovasculares/metabolismo , Trastorno Mineral y Óseo Asociado a la Enfermedad Renal Crónica/metabolismo , Animales , Avitaminosis/epidemiología , Avitaminosis/metabolismo , Biomarcadores/metabolismo , Enfermedades Cardiovasculares/epidemiología , Sistema Cardiovascular , Trastorno Mineral y Óseo Asociado a la Enfermedad Renal Crónica/epidemiología , Comorbilidad , Factor-23 de Crecimiento de Fibroblastos , Humanos , Hormona Paratiroidea/metabolismo , Fosfatos/metabolismo , Factores de Riesgo
20.
Artículo en Inglés | MEDLINE | ID: mdl-32390938

RESUMEN

In critical illness, homeostatic corrections representing the culmination of hundreds of millions of years of evolution, are modulated by the activated glucocorticoid receptor alpha (GRα) and are associated with an enormous bioenergetic and metabolic cost. Appreciation of how homeostatic corrections work and how they evolved provides a conceptual framework to understand the complex pathobiology of critical illness. Emerging literature place the activated GRα at the center of all phases of disease development and resolution, including activation and re-enforcement of innate immunity, downregulation of pro-inflammatory transcription factors, and restoration of anatomy and function. By the time critically ill patients necessitate vital organ support for survival, they have reached near exhaustion or exhaustion of neuroendocrine homeostatic compensation, cell bio-energetic and adaptation functions, and reserves of vital micronutrients. We review how critical illness-related corticosteroid insufficiency, mitochondrial dysfunction/damage, and hypovitaminosis collectively interact to accelerate an anti-homeostatic active process of natural selection. Importantly, the allostatic overload imposed by these homeostatic corrections impacts negatively on both acute and long-term morbidity and mortality. Since the bioenergetic and metabolic reserves to support homeostatic corrections are time-limited, early interventions should be directed at increasing GRα and mitochondria number and function. Present understanding of the activated GC-GRα's role in immunomodulation and disease resolution should be taken into account when re-evaluating how to administer glucocorticoid treatment and co-interventions to improve cellular responsiveness. The activated GRα interdependence with functional mitochondria and three vitamin reserves (B1, C, and D) provides a rationale for co-interventions that include prolonged glucocorticoid treatment in association with rapid correction of hypovitaminosis.


Asunto(s)
Adaptación Fisiológica/fisiología , Enfermedad Crítica , Metabolismo Energético , Homeostasis/genética , Receptores de Glucocorticoides/fisiología , Adaptación Fisiológica/efectos de los fármacos , Animales , Avitaminosis/complicaciones , Avitaminosis/genética , Avitaminosis/metabolismo , Enfermedad Crítica/rehabilitación , Metabolismo Energético/efectos de los fármacos , Metabolismo Energético/genética , Regulación de la Expresión Génica/efectos de los fármacos , Glucocorticoides/deficiencia , Glucocorticoides/farmacología , Homeostasis/efectos de los fármacos , Humanos , Mitocondrias/efectos de los fármacos , Mitocondrias/fisiología
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