Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 15 de 15
Filtrar
1.
Front Endocrinol (Lausanne) ; 15: 1336402, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38742197

RESUMO

Diabetic kidney disease (DKD), a significant complication associated with diabetes mellitus, presents limited treatment options. The progression of DKD is marked by substantial lipid disturbances, including alterations in triglycerides, cholesterol, sphingolipids, phospholipids, lipid droplets, and bile acids (BAs). Altered lipid metabolism serves as a crucial pathogenic mechanism in DKD, potentially intertwined with cellular ferroptosis, lipophagy, lipid metabolism reprogramming, and immune modulation of gut microbiota (thus impacting the liver-kidney axis). The elucidation of these mechanisms opens new potential therapeutic pathways for DKD management. This research explores the link between lipid metabolism disruptions and DKD onset.


Assuntos
Nefropatias Diabéticas , Metabolismo dos Lipídeos , Humanos , Nefropatias Diabéticas/metabolismo , Animais , Transtornos do Metabolismo dos Lipídeos/metabolismo , Transtornos do Metabolismo dos Lipídeos/complicações , Microbioma Gastrointestinal
2.
Int J Biol Macromol ; 265(Pt 2): 131017, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38513909

RESUMO

Water dropwort is favored by consumers for its unique flavor and medicinal value. Terpenoids were identified as the main volatile compounds related to its flavor. In this study, water dropwort was treated with different concentrations of exogenous methyl jasmonate (MeJA). The contents of volatile terpenoids were determined under various MeJA treatments. The results indicated that 0.1 mM of MeJA most effectively promoted the biosynthesis of flavor-related terpenoids in water dropwort. Terpinolene accounted the highest proportion among terpene compounds in water dropwort. The contents of jasmonates in water dropwort were also increased after exogenous MeJA treatments. Transcriptome analysis indicated that DEGs involved in the terpenoid biosynthesis pathway were upregulated. The TPS family was identified from water dropwort, and the expression levels of Oj0473630, Oj0287510 and Oj0240400 genes in TPS-b subfamily were consistent with the changes of terpene contents under MeJA treatments. Oj0473630 was cloned from the water dropwort and designated as OjTPS3, which is predicted to be related to the biosynthesis of terpinolene in water dropwort. Subcellular localization indicated that OjTPS3 protein was localized in chloroplast. Protein purification and enzyme activity of OjTPS3 protein were conducted. The results showed that the purified OjTPS3 protein catalyzed the biosynthesis of terpinolene by using geranyl diphosphate (GPP) as substrate in vitro. This study will facilitate to further understand the molecular mechanism of terpenoid biosynthesis and provide a strategy to improve the flavor of water dropwort.


Assuntos
Ciclopentanos , Oenanthe , Oxilipinas , Terpenos , Terpenos/metabolismo , Oenanthe/metabolismo , Monoterpenos Cicloexânicos , Acetatos/farmacologia
3.
Plants (Basel) ; 12(7)2023 Mar 27.
Artigo em Inglês | MEDLINE | ID: mdl-37050085

RESUMO

Water dropwort (Oenanthe javanica (Blume) DC.) is an important vegetable crop. Nutrient liquid culture has become an important cultivation method in the production of water dropwort. However, the effects of different nutrient solution cultivation methods on the growth and quality of water dropwort remains unclear. In this study, to screen the most suitable nutrient solution formula for the cultivation of water dropwort, the effects of different nutrient solution formulas (Hoagland, Cooper, Dutch greenhouse, Garden-style, Yamasaki and SCAU) on plant physiological and quality characteristics are investigated. The plant height, root length, water content (%), distribution rate of dry matter (%), chlorophyll, VC, flavonoid, total phenolic, DPPH and dietary fiber of water dropwort under different nutrient solutions were determined. According to the analytic hierarchy process (AHP) of the growth index and quality index of water dropwort under different nutrient solutions, the Yamazaki nutrient solution was considered to be the most suitable nutrient solution formula for water dropwort. To further confirm the differences of water dropwort under nutrient solution culture and soil culture, the broadly targeted metabolomics were performed. A total of 485 metabolites were detected in water dropwort under optimal nutrient solution and soil cultivation. Metabolomics analysis showed that flavonoids were the most abundant differential accumulated metabolites, and most flavonoids were up-regulated. A qRT-PCR assay indicated that the structural genes of the flavonoid biosynthesis pathway (PAL, C4H, CHS, CHI, F3H, DFR, UFGT) were significantly higher under the Yamasaki nutrient solution treatment. The current study provided a theoretical basis and technical guidance for the nutrient solution cultivation of water dropwort. Meanwhile, this study provides new insights into the study of flavonoids in water dropwort.

4.
J Phys Chem B ; 127(16): 3728-3736, 2023 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-37043396

RESUMO

Surfactin is a typical kind of biosurfactant with a large diversity of structure, and its molecular structure is expected to play a crucial role in its adsorption dynamics. Adsorption kinetics of surfactin homologues at the n-hexadecane/aqueous solution interface is studied using a droplet-based microfluidic method. Molecular dynamics simulations are performed to illustrate the dependence of adsorption energy on the surfactin structure. Rapid reduction of dynamic interfacial tensions is obtained. The best fit to experimental results reveals that surfactin with shorter aliphatic chains, C13-surfactin and C14-surfactin, has larger rate constants of adsorption and desorption. Interfacial tensions are rapidly reduced in the case of the oil/water interface which is freshly formed, and the equilibrium adsorption is rapidly established approximately in 100-350 ms at concentrations above the critical micelle concentration. C15-surfactin that has a longer aliphatic chain adsorbs and desorbs slower, and the equilibration time of adsorption is slightly longer. Moreover, C15-surfactin has a strong tendency for adsorbing at the interface, which is in accordance with the larger adsorption energy obtained by molecular dynamics simulation, and aggregating behavior in solution. The present study provides insights on the surfactin structure and the dynamics of adsorption at the liquid/liquid interface.

5.
CNS Neurosci Ther ; 29(8): 2267-2280, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-36942495

RESUMO

INTRODUCTION: Neuro-navigated repetitive transcranial magnetic stimulation (rTMS) is effective in alleviating cognitive deficits in Alzheimer's disease (AD). However, the strategy for target determination and the mechanisms for cognitive improvement remain unclear. METHODS: One hundred and thirteen elderly subjects were recruited in this study, including both cross-sectional (n = 79) and longitudinal experiments (the rTMS group: n = 24; the sham group: n = 10). The cross-sectional experiment explored the precise intervention target based on the cortical-hippocampal network. The longitudinal experiment investigated the clinical efficacy of neuro-navigated rTMS treatment over a four-week period and explored its underlying neural mechanism using seed-based and network-based analysis. Finally, we applied connectome-based predictive modeling to predict the rTMS response using these functional features at baseline. RESULTS: RTMS at a targeted site of the left angular gyrus (MNI: -45, -67, 38) significantly induced cognitive improvement in memory and language function (p < 0.001). The improved cognition correlated with the default mode network (DMN) subsystems. Furthermore, the connectivity patterns of DMN subsystems (r = 0.52, p = 0.01) or large-scale networks (r = 0.85, p = 0.001) at baseline significantly predicted the Δ language cognition after the rTMS treatment. The connectivity patterns of DMN subsystems (r = 0.47, p = 0.019) or large-scale networks (r = 0.80, p = 0.001) at baseline could predict the Δ memory cognition after the rTMS treatment. CONCLUSION: These findings suggest that neuro-navigated rTMS targeting the left angular gyrus could improve cognitive function in AD patients. Importantly, dynamic regulation of the intra- and inter-DMN at baseline may represent a potential predictor for favorable rTMS treatment response in patients with cognitive impairment.


Assuntos
Doença de Alzheimer , Estimulação Magnética Transcraniana , Humanos , Idoso , Doença de Alzheimer/diagnóstico por imagem , Doença de Alzheimer/terapia , Doença de Alzheimer/psicologia , Estudos Transversais , Lobo Parietal , Resultado do Tratamento , Imageamento por Ressonância Magnética
6.
Front Plant Sci ; 14: 1287589, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38205019

RESUMO

Gene expression analysis is widely used to unravel molecular regulatory mechanisms and identify key genes in plants. Appropriate reference gene is an important prerequisite to ensure the accuracy and reliability of qPCR analysis results. Water dropwort is a plant of the Oenanthe genus in the Apiaceae family, which has high economic benefits. However, the underlying molecular regulatory mechanisms in the growth and development of water dropwort have not been fully understood and the appropriate reference genes in different developmental stages of water dropwort not yet reported. In this study, 10 candidate reference genes (ACTIN, PP2A, SAND, EF-1α, GAPDH, UBQ, MIP, TBP, RPS-18, eIF-4α) were identified and cloned from Oenanthe javanica. The qPCR primers of candidate reference genes were designed and verified. Four statistical algorithms, geNorm, NormFinder, BestKeeper and RefFinder were used to evaluate the expression stability of 10 candidate reference genes in different developmental stages of water dropwort. The results showed that TBP and UBQ were the most stable genes in different developmental stages of water dropwort, while GAPDH was the most unstable gene. The normalization of EXP1 genes at different developmental stages further confirmed the reliability of internal reference genes. The results of this study provide a theoretical basis for selecting appropriate internal reference genes in different developmental stages of water dropwort. This study also provides technical support and reliable basis for the expression analysis of key genes in different developmental stages of water dropwort.

7.
Ying Yong Sheng Tai Xue Bao ; 33(2): 405-414, 2022 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-35229514

RESUMO

Light simplified cultivation and high quality rice are the main directions of rice production in China. Meteorological factors are the most important environmental factors affecting rice growth and yield. Few studies examined the relationship between rice yield and microclimate under different light simplified cultivation modes. To explore the relationship between rice yield and climatic factors (temperature, sunshine and water) at different growth stages of hybrid rice under different forecrops in southwest China, we carried out a split-plot design experiment in 2019 and 2020, with two forecrops of green cabbage and rape as the main plot, and three planting methods, direct-seeding, blanket-transplanting, and artificial transplanting as the subplots, taking Yixiangyou 2115 as the experimental variety. Results showed that compared with rape-paddy cropping system, cabbage-paddy cropping system significantly improved the accumulated temperature and precipitation production efficiency and consequently improved the effective panicles, setting rate, and 1000-grain weight. The yield was increased by 12.7% and 8.3% under cabbage-paddy and rape-paddy cropping system, respectively. Compared with manual transplanting, mechanical transplanting improved effective panicles, production efficiency of radiation, accumulated temperature and precipitation, and the radiation use efficiency of grain during the whole growth period. The mean yield was increased by 4.6% in 2019 and 2020. However, the above parameters of direct-seeding significantly decreased, but the yield decreased by 8.7%. Compared with 2019, mechanical transplanting and artificial transplanting were sown one month earlier in 2020 under the same stubble, which shortened growth period, reduced air temperature, and increased precipitation after flowering, leading to a significant decrease in effective accumulated temperature and light radiation; production efficiency of accumulated temperature, light energy, and precipitation; and utilization efficiency of light energy of grain, spikelets per panicle, setting rate, and 1000-grain weight. However, the yield was significantly reduced. Partial least squares regression analysis was used to establish the production forecast equation of standardized regression coefficients of meteorological factors. There was a positive correlation between rice yield and effective accumulated temperature and total radiation during the growth stage or the whole growth period. In addition, there was a significant negative correlation between rice yield and precipitation during the whole growth period. In conclusion, mechanical transplanting under cabbage-paddy cropping system was a rice planting method that optimised the seasonal sunshine and temperature resources in southwest China. The method facilitated the full utilization of temperature and sunshine resources, resulting in high yield. However, it was not advisable to sow or transplant too early.


Assuntos
Agricultura , Brassica , Oryza , Agricultura/métodos , Brassica/crescimento & desenvolvimento , China , Grão Comestível , Oryza/crescimento & desenvolvimento , Temperatura
8.
ACS Omega ; 6(28): 18442-18450, 2021 Jul 20.
Artigo em Inglês | MEDLINE | ID: mdl-34308075

RESUMO

A basic understanding of the high-temperature pyrolysis process of jet fuels is not only valuable for the development of combustion kinetic models but also critical to the design of advanced aeroengines. The development and utilization of alternative jet fuels are of crucial importance in both military and civil aviation. A direct coal liquefaction (DCL) derived liquid fuel is an important alternative jet fuel, yet fundamental pyrolysis studies on this category of jet fuels are lacking. In the present work, high-temperature pyrolysis studies on a DCL-derived jet fuel and its blend with the traditional RP-3 jet fuel are carried out by using a single-pulse shock tube (SPST) facility. The SPST experiments are performed at averaged pressures of 5.0 and 10.0 bar in the temperature range around 900-1800 K for 0.05% fuel diluted by argon. Major intermediates are obtained and quantified using gas chromatography analysis. A flame-ionization detector and a thermal conductivity detector are used for species identification and quantification. Ethylene is the most abundant product for the two fuels in the pyrolysis process. Other important intermediates such as methane, ethane, propyne, acetylene, and 1,3-butadiene are also identified and quantified. The pyrolysis product distributions of the pure RP-3 jet fuel are also performed. Kinetic modeling is performed by using a modern detailed mechanism for the DCL-derived jet fuel and its blends with the RP-3 jet fuel. Rate-of-production analysis and sensitivity analysis are conducted to compare the differences of the chemical kinetics of the pyrolysis process of the two jet fuels. The present work is not only valuable for the validation and development of detailed combustion mechanisms for alternative jet fuels but also improves our understanding of the pyrolysis characteristics of alternative jet fuels.

9.
ACS Omega ; 6(16): 11039-11047, 2021 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-34056257

RESUMO

A single-pulse shock tube study of the pyrolysis of two different concentrations of Chinese RP-3 jet fuel at 5 bar in the temperature range of 900-1800 K has been performed in this work. Major intermediates are obtained and quantified using gas chromatography analysis. A flame-ionization detector and a thermal conductivity detector are used for species identification and quantification. Ethylene is the most abundant product in the pyrolysis process. Other important intermediates such as methane, ethane, propyne, acetylene, butene, and benzene are also identified and quantified. Kinetic modeling is performed using several detailed, semidetailed, and lumped mechanisms. It is found that the predictions for the major species such as ethylene, propene, and methane are acceptable. However, current kinetic mechanisms still need refinement for some important species. Different kinetic mechanisms exhibit very different performance in the prediction of certain species during the pyrolysis process. The rate of production (ROP) is carried out to compare the differences among these mechanisms and to identify major reaction pathways to the formation and consumption of the important species, and the results indicate that further studies on the thermal decomposition of 1,3-butadiene are needed to optimize kinetic models. The experimental data are expected to contribute to a database for the validation of mechanisms under pyrolytic conditions for RP-3 jet fuel and should also be valuable to a better understanding of the combustion behavior of RP-3 jet fuel.

10.
Zhongguo Zhong Yao Za Zhi ; 46(7): 1667-1673, 2021 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-33982466

RESUMO

This study aims to investigate the preventive effect of Dendrobium officinale in LPS-induced intestinal mucosal damage. Forty SPF-grade C57 BL/6 J male mice were randomly divided into normal group(NC), model group(LPS), and two superfine powder groups of Dendrobium officinale(DOF)(DOF-L, 0.30 g·kg~(-1)and DOF-H, 0.60 g·kg~(-1), respectively), with 10 mice in each group. DOF superfine powder suspension was given via oral administration to mice for 7 days, while the mice in NC and LPS groups received the same volume of saline for 7 days. On the eighth day, the mice in LPS group and DOF treatment groups were injected with LPS(5 mg·kg~(-1)) by intraperitoneal injection to establish the intestinal mucosal injury model, while the mice in NC group were injected with the same volume of sterile saline in the same manner. Six hours after injection with LPS or saline, plasma and the intestinal tissue were collected. The diamine oxidase(DAO) and D-lactate levels in plasma were detected with a biochemical method. The levels of proinflammatory factors interleukin-6(IL-6) and tumor necrosis factor-α(TNF-α) in plasma were detected by ELISA. The histomorphology and ultrastructure of mouse ileum tissues were observed by hematoxylin-eosin(HE) staining in optical microscope and transmission electron microscope(TEM). The expression and distribution of tight junction(TJ) proteins claudin-1, occludin and F4/80 were detected by immunohistochemistry while the protein expression levels of Toll-like receptor 4(TLR-4) and nuclear factor kappa B p65(NF-κB p65) in jejunum were detected by Western blot. The experimental results showed that continuous intragastric administration of D. officinale superfine powder for 7 days obviously alleviated the damage and ultrastructural changes of intestinal mucosa induced by LPS; significantly decreased DAO and D-lactate levels in plasma in model group(P<0.05); up-regulated the protein expression of claudin-1 and occludin in ileum tissues; down-regulated the protein expression of TLR-4 and NF-κB p65 in jejunum tissues(P<0.01); significantly decreased TNF-α and IL-6 levels in plasma(P<0.05); and decreased the infiltration of F4/80~+ macrophage cells. Our results suggested that D. officinale had significant protective effects on LPS-induced intestinal mucosal damage and reduced intestinal permeability. The mechanism might be related to its effects of inhibiting inflammation via TLR-4/NF-κB p65, and up-regulating the expression of tight junction proteins.


Assuntos
Dendrobium , Lipopolissacarídeos , Animais , Mucosa Intestinal , Masculino , Camundongos , NF-kappa B , Pós , Fator de Necrose Tumoral alfa/genética
11.
Zhongguo Zhong Yao Za Zhi ; 44(22): 4896-4904, 2019 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-31872598

RESUMO

Previous studies of Dendrobium officinale on anti-hypertension effect always focused only on the blood pressure,while polysaccharides of D. officinale( DOP) have been traditionally considered as one of the main effective substances. This study aimed to evaluate the effect of ethanol extract from D. officinale( DOE) on blood pressure,Glu and lipid profile in metabolic hypertensive rats induced by comprehensive dietary factors,and elucidate the composition of effective fractions from DOE. A metabolic hypertension model of rat induced by high-sugar,high-fat diet and alcohol drinking was adopted to evaluate the effect of DOE on hypertension and other metabolic disorders. Blood pressure,Glu and lipid profile were detected to find the features and differences of DOE and DOP on metabolic hypertension. Furthermore,DOE was separated with three different common solvents according to the polarity. Along with blood pressure,Glu,UA and lipid profile,hemorheology,oxidative index and aortas structure changes were adopted to evaluate the comprehensive effects of the most effective fractions on metabolic hypertension. Finally,HPLC-DAD-MS was adopted to identify the components of the most effective fraction. The SBP and Glu of models were decreased significantly after administration of DOE and DOP for 6 weeks,while TG in DOE groups also reduced dramatically. The DOE was separated with ether,n-butanol respectively and named NAF,NBF and NCF. SBP,TG,Glu,UA of model rats were decreased significantly after 4 weeks administration with NBF. The level of MDA in serum was down-regulated,while GSH-Px and T-AOC were up-regulated obviously after 12 weeks.And the blood viscosity also obviously decreased,with less collagen deposition of aortas by Masson's trichrome staining. NBF was mainly composed of phenols and flavone C-glycosides,whose aglycone was apigenin,and monosaccharide was connected to C-6 and C-8. Ethanol extract from D.officinale has an positive effect in alleviating hypertension and metabolic disorders in metabolic hypertension. Medium polarity fraction was the effective fraction of alcohol extraction from D. officinale,and mainly composed of phenols and flavone C-glycosides.


Assuntos
Dendrobium , Hipertensão/tratamento farmacológico , Extratos Vegetais/uso terapêutico , Animais , Pressão Sanguínea , Etanol , Extratos Vegetais/farmacologia , Ratos
12.
Nat Commun ; 10(1): 3259, 2019 Jul 22.
Artigo em Inglês | MEDLINE | ID: mdl-31332185

RESUMO

Spatially resolved information about material deformation upon loading is critical to evaluating mechanical properties of materials, and to understanding mechano-response of live systems. Existing techniques may access local properties of materials at nanoscale, but not at locations away from the force-loading positions. Moreover, interpretation of the local measurement relies on correct modeling, the validation of which is not straightforward. Here we demonstrate an approach to evaluating non-local material deformation based on the integration of nanodiamond orientation sensing and atomic force microscopy nanoindentation. This approach features a 5 nm precision in the loading direction and a sub-hundred nanometer lateral resolution, high enough to disclose the surface/interface effects in the material deformation. The non-local deformation profile can validate the models needed for mechanical property determination. The non-local nanometer-precision sensing of deformation facilitates studying mechanical response of complex material systems ranging from impact transfer in nanocomposites to mechano-response of live systems.

13.
Zhongguo Zhong Xi Yi Jie He Za Zhi ; 36(11): 1345-1351, 2016 Nov.
Artigo em Chinês | MEDLINE | ID: mdl-30641629

RESUMO

Objective To observe the effect of Heixiaoyao Powder (HP) on gene microarray profile of hippocampus in Aß23₋35 fragments induced Alzheimer's disease rat model. Methods Female SD rats were chosen to establish AD model by injecting Aß25₋35 amyloid into hippocampus ,and then they were divid- ed into 6 groups, i.e., the sham-operation group, the model group,the Western medicine (WM) group, high, middle, and low dose HP groups, 14 in each group. After 7 days of modeling, all rats were administered with respective solution at the daily dose of 3 mL/kg by gastrogavage for 28 successive days. Normal saline was administered to rats in the sham-operation group and the model group. Huperzine A Tablets wa- ter solution was administered to rats in the WM group at the daily dose of 0. 02 mL/kg. HP at the daily dose of 4. 25, 8. 50, 17. 00 g/kg was administered to rats in the low, middle, high HP groups. All rats were sacri- ficed after ending gastrogavage, and their hippocampal tissues were collected to extract tissue RNA. Rat gene microarray was used to screen differentially expressed genes, and then differentially expressed genes with partial dose-dependently changing obtained by microarry were verified by qRT-PCR. Results Compared with the sham-operation group, 538 genes were up-regulated, and 579 genes were down-regulated in the model group. mRNA expressions of wisp1 , crebbp, igfbp-1 , znf483, zfp37, and zic4 increased, while mRNA expressions of casq2 and bcl-2 decreased in the model group (P <0. 05). Compared with the model group, 276 genes were up-regulated, and 170 genes were down-regulated in the 3 HP groups. Of them, 71 up-regulated genes dose-dependently and 70 down-regulated genes dose-dependently. mRNA expressions of igfbp-1 , znf483, zfp37, and zic4 decreased, while mRNA expressions of casq2 and bcl-2 in- creased in the WM group (P <0. 01). mRNA expressions of wisp1 , crebbp, igfbp-1 , znf483, zfp37, and zic4 decreased, while mRNA expressions of casq2 and bcl-2 increased in the high dose HP group (P <0. 01). mRNA expressions of crebbp, igfbp-1, znf483, zfp37, and zic4 decreased (P <0. 01, P <0. 05), while mR- NA expressions of casq2 and bcl-2 increased in the middle dose HP group (P <0. 01, P <0. 05). mRNA ex- pressions of igfbp-1 , znf483, zfp37, and zic4 decreased in the low dose HP group (P <0. 01). Compared with the middle dose HP group, mRNA expressions of crebbp, zfp37, and zic4 increased (P <0.01) , mR- NA expressions of igfbp-1 and bcl-2 decreased in the middle dose HP group (P <0. 01, P <0. 05); mRNA expressions of crebbp, znf483, and zfp37 increased (P <0. 01, P <0. 05), mRNA expressions of igfbp-1, zic4, and bcl-2 decreased in the low dose HP group (P <0. 01). Compared with the middle HP group, mRNA expressions of casq2, zic4, and bcl-2 decreased in the low dose HP group (P <0. 01, P <0. 05). Conclusion HP could affect the occurrence of AD by regulating mRNA expressions of zfp37, znf483, and zic4, and af- fect the metabolism of Aß and abnormal phosphorylation of Tau protein by inhibiting wnt signal pathway re- lated genes such as wisp-1 , crebbp, igfbp-1 , and casq2.


Assuntos
Doença de Alzheimer , Medicamentos de Ervas Chinesas , Transcriptoma , Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/metabolismo , Animais , Medicamentos de Ervas Chinesas/farmacologia , Feminino , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo , Ratos , Ratos Sprague-Dawley
14.
Zhong Yao Cai ; 37(10): 1725-9, 2014 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-25895375

RESUMO

OBJECTIVE: To investigate the effect of NaCl stress on the growth and physiological characteristics of Physalis alkekengi var. franchetii, and to discuss the mechanism of salt tolerance. METHODS: The test-tube plantlet was cultured on the stress medium with NaCl (0.2%~1.0%), the content of proline, soluble sugar, soluble protein, chlorophyll and malondialdthyde (MDA), and membrane relative permeability, as well as the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) were determined and analyzed. RESULTS: The average height, stem diameter, root length, number of root and chlorophyll content gradually decreased at salinity less than or equal 0.6% NaCl, then decreased rapidly at salinity greater than or equal 0.8% NaCl, while the root formation was significantly inhibited. The content of free proline and SOD activities always increased with NaCl concentration increasing (0.2%~ 1.0%). Nevertheless, the contents of soluble sugar, soluble protein and the activities of CAT and POD increased firstly and then decreased, but the contents of soluble sugar and soluble protein were higher than those of the control group, whereas the content of MDA and membrane relative permeability accumulated slowly at salinity less than or equal 0.6% NaCl, then increased rapidly at salinity greater than 0.8% NaCl. CONCLUSION: The test-tube plantlet has an adaptability to salty environment at salinity less than or equal 0.6% NaCl, and the test-tube plantlet can alleviate the salty injury by increasing the contents of osmotic regulation substances, such as soluble sugar and soluble protein, decreasing the osmotic potential, and increasing the activities of antioxidant enzymes.


Assuntos
Physalis/fisiologia , Salinidade , Cloreto de Sódio/farmacologia , Estresse Fisiológico , Antioxidantes/metabolismo , Carboidratos/química , Catalase/metabolismo , Clorofila/química , Peroxidase/metabolismo , Peroxidases/metabolismo , Physalis/efeitos dos fármacos , Raízes de Plantas/crescimento & desenvolvimento , Prolina/química , Superóxido Dismutase/metabolismo
15.
Zhejiang Da Xue Xue Bao Yi Xue Ban ; 40(5): 555-8, 2011 09.
Artigo em Chinês | MEDLINE | ID: mdl-21984161

RESUMO

OBJECTIVE: To review the clinical and genetic features of a pedigree of Kennedy disease in China. METHODS: The clinical data of patients from a Kennedy disease family were collected. The numbers of trinucleotide CAG repeats in exon 1 of the androgen receptor gene were determined by DNA sequencing and repeat fragment analysis. RESULTS: In the pedigree, 4 patients were identified as Kennedy disease. Clinical manifested with adult-onset, progressive proximal limb muscle weakness and atrophy, gynecomastia, oligospermia were also presented. The number of trinucleotide CAG repeats in exon 1 of the androgen receptor gene was 51 in the proband. The electrophysiological study showed sensory and motor involvement and their serum triglycerides values were elevated significantly. CONCLUSION: Androgen receptors gene testing is the most reliable diagnosing method, the patients suspected as Kennedy disease should have a gene testing of androgen receptors.


Assuntos
Atrofia Bulboespinal Ligada ao X/genética , Receptores Androgênicos/genética , Sequência de Bases , Atrofia Bulboespinal Ligada ao X/diagnóstico , Humanos , Masculino , Pessoa de Meia-Idade , Dados de Sequência Molecular , Linhagem , Repetições de Trinucleotídeos/genética
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA