scholarly journals Frontiers in Vitamin Research: New Antibodies, New Data

2011 ◽  
Vol 11 ◽  
pp. 1226-1242 ◽  
Author(s):  
Rafael Coveñas ◽  
Arturo Mangas ◽  
Dominique Bodet ◽  
Sébastien Duleu ◽  
Pilar Marcos ◽  
...  

Since 2004, the anatomical distribution of vitamins in the monkey brain, studied using immunohistochemical techniques and new tools (specific antisera that discriminate different vitamins reasonably well), has been an ongoing research field. The visualization of immunoreactive structures containing vitamins (folic acid, riboflavin, thiamine, pyridoxal, and vitamin C) has recently been reported in the monkey brain (Macaca fascicularis), all these vitamins showing a restricted or very restricted distribution. Folic acid, thiamine, and riboflavin have only been observed in immunoreactive fibers, vitamin C has only been found in cell bodies (located in the primary somatosensory cortex), and pyridoxal has been found in both fibers and cell bodies. Perikarya containing pyridoxal have been observed in the paraventricular hypothalamic nucleus, the periventricular hypothalamic region, and in the supraoptic nucleus. The fibers containing vitamins are thick, smooth (without varicosities), and are of medium length or long, whereas immunoreactive cell bodies containing vitamins are round or triangular. At present, there are insufficient data to elucidate the roles played by vitamins in the brain, but the anatomical distribution of these compounds in the monkey brain provides a general idea (although imprecise and requiring much more study) about the possible functional implications of these molecules. In this sense, here the possible functional roles played by vitamins are discussed.

Chronic Renal Failure (CRF) is a disease caused due to kidney damage or deterioration glomerulus filtrate rate (GFR/GFR/Glomerular Filtration Rate) <60 ml/min /1.73 m2 for ≥ 3 months. One of the complications that often appears in CRF is anemia or decrease of hemoglobin level in the blood that is related to the relationship intake of nutrients (protein, vitamin C, folic acid and iron). The purpose of this study was to determine the relationship Intake of nutrients (protein, vitamin C, folic acid and iron) on Hb levels of chronic renal failure patients undergoing hemodialysis in RSI Siti Khadijah Palembang. This type of research is an observational analytic with a cross-sectional study design. Population in this study were all outpatients with chronic renal failure undergoing hemodialysis in RSI Siti Khadijah Palembang with total research subjects were 50 subjects, taken using purposive sampling and analyzed using chi-square test. The result showed that there are 52% of patients with chronic renal failure are male more than female. The aged 50-64 years old is 44% and 30-49 years old are 32%. The percentage of outpatients who had an adequate intake of protein, vitamin C, folic acid and iron were 28%, 10%, 0%, and 18% respectively, meanwhile, most of the patients had low hemoglobin levels which were 94%. There was not a significant association between intake of nutrients (protein, vitamin C, folic acid and iron) on Hb levels of chronic renal failure patients undergoing hemodialysis in RSI Siti Khadijah Palembang. Based on these results, should be noted again nutrient intake (protein, vitamin C, folic acid and iron) outpatient before and after undergoing hemodialysis to support the optimal outcome of hemodialysis therapy.


Toxicology ◽  
2012 ◽  
Vol 291 (1-3) ◽  
pp. 32-42 ◽  
Author(s):  
Chiu-Lan Hsieh ◽  
Hui-Er Wang ◽  
Wan-Jane Tsai ◽  
Chiung-Chi Peng ◽  
Robert Y. Peng

2020 ◽  
pp. 7-13
Author(s):  
Сергей Михайлович Зиматкин ◽  
Анастасия Викторовна Заерко ◽  
Екатерина Михайловна Федина

Введение. Существуют ряд физиологических, экспериментальных и патологических условий, которые могут индуцировать изменения в размере, морфологии, местоположении и количестве ядрышек в соответствии с функциональной и метаболической активностью. Одним из таких условий является постнатальное развитие клеток, в том числе и нейронов. Цель - изучение особенностей структурно-функционального становления ядрышек гистаминергических нейронов мозга крысы в постнатальном онтогенезе. Материал и методы. Работа выполнена на беспородных белых крысах (12 особей) в возрасте 5, 20 и 45 сут постнатального онтогенеза. Изучали число и размеры ядрышек в ядрах гистаминергических нейронов в ядре E2 задней гипоталамической области мозга крыс с применением электронно-микроскопических и морфометрических методик, а также - непараметрической статистики. Результаты. У крыс от 5 до 45 сут постнатального развития уменьшается число и увеличиваются размеры ядрышек в ядре гистаминергических нейронов задней области гипоталамуса, а также происходит перемещение ядрышек от кариолеммы к центру ядра. По мере взросления животных в гистаминергических нейронах происходит постепенное преобразование относительно компактных ядрышек в ретикулярные, при этом увеличивается количество фибриллярного и гранулярного компонентов, а также возрастает число и уменьшаются размеры фибриллярных центров. Кроме того, наблюдается уменьшение облака мигрирующих субъединиц рибосом между ядрышком и кариолеммой, а также количества ассоциированного с ядрышком гетерохроматина. Выводы. В ядре E2 гипоталамуса крыс в возрасте от 5 до 45 сут постнатального онтогенеза значительно изменяются число, размеры, строение и топография ядрышек в ядрах гистаминергических нейронов. Introduction. There are a number of physiological, experimental, and pathological conditions that can induce changes in the size, morphology, location, and number of nucleoli in accordance with functional and metabolic activity. One of these conditions is the postnatal maturation of cells, including neurons. Objective - to assess the characteristics of structural and functional formation of histaminergic neurons nucleoli in rat brain during postnatal ontogeny. Material and methods. The work was performed on the offspring of outbred white rats (12 rats) on the 5th, 20th and 45th days of postnatal ontogenesis. Electron microscopic, morphometric and statistical methods were used to study the number and quantity of nucleoli in the nuclei of histaminergic neurons located in the E2 nucleus of posterior hypothalamic region of rat brain. Results. From the 5th to the 45th day of the rat postnatal development, there was a decrease in the number and increase in the size of the nucleoli in the nuclei of histaminergic neurons located in the posterior hypothalamic region, as well as their movement from the karyolemma to the center of the nucleus. As animals growed up, relatively compact nucleoli in the brain histaminergic neurons gradually transformed into reticular nucleoli, while the quantity of fibrillar and granular components increased, at the same time the quantity of fibrillar centers increased and the size of fibrillar centers decreased. In addition, we detected a decrease in the cloud of migrating ribosome subunits between the nucleolus and karyolemma and in the amount of heterochromatin associated with the nucleolus. Conclusions. From the 5th to the 45th day of the postnatal development, the number, size, structure and topography of the nucleoli of the rat brain histaminergic neurons located in the E2 hypothalamic nucleus in postnatal ontogenesis changed significantly.


2011 ◽  
Vol 106 (5) ◽  
pp. 700-707 ◽  
Author(s):  
Jen-Yin Chen ◽  
Chin-Chen Chu ◽  
Yung-Song Lin ◽  
Edmund Cheng So ◽  
Ja-Ping Shieh ◽  
...  

Postherpetic neuralgia (PHN) is the most common complication of herpes zoster (HZ). The aim of the present study was to compare the nutritional status of PHN patients with that of healthy controls, and then to identify risk factors for PHN using multivariate multiple logistic regressions. In the present cross-sectional study, we prospectively enrolled fifty PHN patients for at least 3 months and fifty healthy controls. We selected nine circulating nutrients including ionised Ca, Zn, retinol, folic acid, vitamin B12, vitamin C, α-tocopherol, γ-tocopherol and lycopene associated with both immunity and the modulation of neuropathic pain, and measured their concentrations in plasma/serum. Concentrations of ionised Ca, Zn, vitamin C and vitamin B12were significantly lower in PHN patients than in controls after excluding those patients receiving supplements since the outbreak of HZ. The prevalence of either mild/marginal or severe deficiencies for any of the nine selected circulating nutrients in PHN patients (92 %) was much higher than that in controls (46 %) (P < 0·001). Lower concentrations of vitamin C ( ≤ 45·0 μmol/l), ionised Ca ( ≤ 1·05 mmol/l) and Zn ( ≤ 0·91 g/l) were found to increase independently the risk of PHN using binary variable (dichotomy) analyses with both PHN patients and controls in a multivariate logistic regression analysis. No significant correlations existed between the risks of PHN and the concentrations of retinol, folic acid, vitamin B12, lycopene or α:γ-tocopherol ratios. Thus, lower concentrations of circulating nutrients, namely vitamin C, ionised Ca or Zn, are probably a risk factor in Taiwanese patients with PHN.


2009 ◽  
Vol 101 (S2) ◽  
pp. S12-S20 ◽  
Author(s):  
Blanca Román-Viñas ◽  
Lourdes Ribas Barba ◽  
Joy Ngo ◽  
Miguel Ángel Martínez-González ◽  
Trudy M. A. Wijnhoven ◽  
...  

The purpose of the present study was to conduct a systematic review of the literature on the value of the methods used to assess dietary patterns for measuring nutrient intake adequacy in the population. Systematic review on Pubmed database up to April 2008. The search included specific key words and MeSH terms. No language limit was set. Only studies that compared food patterns with nutrient intake adequacy or nutrient biomarkers were included in the analysis. The search resulted in 1504 articles. The inclusion and exclusion criteria limited the selection to thirty articles. Nineteen studies evaluated the usefulness of the dietary patterns, eithera prioridefined (thirteen studies), or defined by factor analysis (four studies) or by cluster analysis (two studies), but only nine of them tested their validity (foura prioridefined and foura posterioridefined). Diet indices showed moderate to good validity results for measuring the adequacy of intakes for α-carotene, β-carotene, vitamin C, vitamin B6, Ca, folic acid, Fe and Mg. The factor analysis approach showed moderate to good validity correlations with the adequacy of intake of α-carotene, β-carotene, lutein, lycopene, vitamin C, vitamin B6and folic acid. Vitamin B12and vitamin E are the micronutrients with less probability of being adequately assessed with dietary patternsa prioriora posterioridefined. Diet indices are tools with fair to moderate validity to assess micronutrient intake adequacy.


2014 ◽  
Vol 9 (7) ◽  
pp. 189-194
Author(s):  
Bukunola O. Adegbesan ◽  
Olugbenga O. Ogunlabi ◽  
Aramide O. Aroyewun ◽  
Emmanuel O. Ajani

Sign in / Sign up

Export Citation Format

Share Document