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排序方式: 共有210条查询结果,搜索用时 15 毫秒
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Porter JD Merriam AP Leahy P Gong B Feuerman J Cheng G Khanna S 《Human molecular genetics》2004,13(3):257-269
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Summary The influence of riboflavin deficiency on severity and duration of parasitemia was studied in Trypanosoma lewisi infected rats.The host dietary groups were: (1) complete or full complement; (2) riboflavin-deficient, and (3) pair-fed or calorically restricted. In all dietary groups, trypomastigotes appeared in peripheral tail blood of all inoculated rats after 7-day incubation periods. Riboflavin-deficient rats and pair-fed controls rats showed greater numbers of parasites than control-diet rats throughout the infection. The maximum parasitemia was on day 14 in control-diet rats; day 16 in riboflavin-deficient rats, and day 14 in pair-fed control rats. Parasitemia in riboflavin-deficient animals lasted 4 or more days longer than in the other two dietary groups.The average coefficients of variation in body length of trypomastigotes indicated that the formation of the reproduction inhibiting antibody (ablastin) was delayed seven days in riboflavin-deficient animals as compared with that in pair-fed and normal control animals. 相似文献
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Ionela Andreea Neacsu Sorina-Alexandra Leau Stefania Marin Alina Maria Holban Bogdan-Stefan Vasile Adrian-Ionut Nicoara Vladimir Lucian Ene Coralia Bleotu Mdlina Georgiana Albu Kaya Anton Ficai 《Materials》2021,14(5)
Microbial infections associated with skin diseases are frequently investigated since they impact on the progress of pathology and healing. The present work proposes the development of freeze-dried, glutaraldehyde cross-linked, and non-cross-linked biocomposite dressings with a porous structure, which may assist the reepithelization process through the presence of collagen and carboxymethylcellulose, along with a therapeutic antimicrobial effect, due to silver nanoparticles (AgNPs) addition. Phisyco-chemical characterization revealed the porous morphology of the obtained freeze-dried composites, the presence of high crystalline silver nanoparticles with truncated triangular and polyhedral morphologies, as well as the characteristic absorption bands of collagen, silver, and carboxymethylcellulose. In vitro tests also assessed the stability, functionality, and the degradability rate of the obtained wound-dressings. Antimicrobial assay performed on Gram-negative (Escherichia coli), Gram-positive (Staphyloccocus aureus) bacteria, and yeast (Candida albicans) models demonstrated that composite wound dressings based on collagen, carboxymethylcellulose, and AgNPs are suitable for skin lesions because they prevent the risk of infection and have prospective wound healing capacity. Moreover, the cell toxicity studies proved that the obtained materials can be used in long time treatments, with no cytotoxic effects. 相似文献
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Dunne Eugene M. Rosen Rochelle K. McTigue Georgiana L. Jamison Robert N. Yeh Gloria Y. Rich Josiah D. Carey Michael P. 《AIDS and behavior》2022,26(2):496-511
AIDS and Behavior - People living with HIV (PLWH) experience higher rates of comorbid chronic pain conditions compared to the general population. Managing HIV and chronic pain, two stigmatized... 相似文献
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Georgiana M. Klug‐Micu Steffen Stenger Andrea Sommer Philip T. Liu Stephan R. Krutzik Robert L. Modlin Mario Fabri 《Immunology》2013,139(1):121-128
The ability of T cells to activate antimicrobial pathways in infected macrophages is essential to host defence against many intracellular pathogens. Here, we compared the ability of two T‐cell‐mediated mechanisms to trigger antimicrobial responses against Mycobacterium tuberculosis in humans, CD40 activation and the release of interferon‐γ (IFN‐γ). Given that IFN‐γ activates a vitamin D‐dependent antimicrobial response, we focused on induction of the key components of this pathway. We show that activation of human monocytes via CD40 ligand (CD40L) and IFN‐γ, alone, and in combination, induces the CYP27b1‐hydroxylase, responsible for the conversion of 25‐hydroxyvitamin D (25D) to the bioactive 1,25‐dihydroxyvitamin D (1,25D), and the vitamin D receptor (VDR). The activation of the vitamin D pathway by CD40L and IFN‐γ results in up‐regulated expression of the antimicrobial peptides, cathelicidin and DEFB4, as well as induction of autophagy. Finally, activation of monocytes via CD40L and IFN‐γ results in an antimicrobial activity against intracellular M. tuberculosis. Our data suggest that at least two parallel T‐cell‐mediated mechanisms, CD40L and IFN‐γ, activate the vitamin D‐dependent antimicrobial pathway and trigger antimicrobial activity against intracellular M. tuberculosis, thereby contributing to human host defence against intracellular infection. 相似文献
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Leandro Georgiana Soares Dourado Júnior Mário Emílio Teixeira Santana Glauciane Costa Dantas Luan Samy Xavier 《Journal of neurology》2022,269(2):693-702
Journal of Neurology - To identify coping strategies used by amyotrophic lateral sclerosis (ALS) patients. Integrative literature review using the Virtual Health Library, MEDLINE, and ScienceDirect... 相似文献
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