Nguyen DT

References (4)

Title : Neuroprotective effects of total alkaloids fraction of Huperzia serrata on scopolamine-induced neurodegenerative animals - Dang_2022_Phytother.Res__
Author(s) : Dang TK , Hong SM , Dao VT , Nguyen DT , Nguyen KV , Nguyen HT , Ullah S , Tran HT , Kim SY
Ref : Phytother Res , : , 2022
Abstract : Huperzia serrata contains Huperzine A (HupA)-an alkaloid used to treat cognitive dysfunction. In this study, we used the total alkaloids (HsAE) to investigate their potential in managing cognitive impairment in comparison with HupA. The antioxidant activity was measured by DPPH assay. In the cellular study, the cell viability and level of ACh of SH-SY5Y cells were evaluated after pretreated with HsAE and scopolamine. For in vivo assay, mice were pre-treated with HsAE, and HupA and undergone scopolamine injection for cognitive impairment. The behavioral tests including the Y-maze and Morris water maze test and the AChE activity, the SOD, CAT, MDA level in the hippocampus and cortex were evaluated. HsAE showed significant scavenging properties on DPPH radicals. HsAE was not toxic to SH-SY5Y cells, and can rescue these cells upon scopolamine treatment. Intriguingly, HsAE showed the neuroprotection against scopolamine-induced amnesia in mice. Moreover, HsAE decreased AChE activity, MDA level, increased antioxidative enzyme activity in the hippocampus as well as cortex of mice, which was relatively better than that of HupA. These findings suggested that HsAE may significantly protect the neurons of mice with scopolamine-induced memory impairment connected to AChE depletion and oxidative stress.
ESTHER : Dang_2022_Phytother.Res__
PubMedSearch : Dang_2022_Phytother.Res__
PubMedID: 36065796

Title : Abnormal social behavior and altered gene expression in mice lacking NDRG2 - Takarada-Iemata_2021_Neurosci.Lett_743_135563
Author(s) : Takarada-Iemata M , Yoshihara T , Okitani N , Iwata K , Hattori T , Ishii H , Roboon J , Nguyen DT , Fan Q , Tamatani T , Nishiuchi T , Asano M , Hori O
Ref : Neuroscience Letters , 743 :135563 , 2021
Abstract : N-myc downstream-regulated gene 2 (NDRG2), a member of the NDRG family, has multiple functions in cell proliferation, differentiation, and stress responses, and is predominantly expressed by astrocytes in the central nervous system. Previous studies including ours demonstrated that NDRG2 is involved in various central nervous system pathologies. However, the significance of NDRG2 in neurodevelopment is not fully understood. Here, we investigated the expression profile of NDRG2 during postnatal brain development, the role of NDRG2 in social behavior, and transcriptome changes in the brain of NDRG2-deficient mice. NDRG2 expression in the brain increased over time from postnatal day 1 to adulthood. Deletion of NDRG2 resulted in abnormal social behavior, as indicated by reduced exploratory activity toward a novel mouse in a three-chamber social interaction test. Microarray analysis identified genes differentially expressed in the NDRG2-deficient brain, and upregulated gene expression of Bmp4 and Per2 was confirmed by quantitative PCR analysis. Expression of both these genes and the encoded proteins increased over time during postnatal brain development, similar to NDRG2. Gene expression of Bmp4 and Per2 was upregulated in cultured astrocytes isolated from NDRG2-deficient mice. These results suggest that NDRG2 contributes to brain development required for proper social behavior by modulating gene expression in astrocytes.
ESTHER : Takarada-Iemata_2021_Neurosci.Lett_743_135563
PubMedSearch : Takarada-Iemata_2021_Neurosci.Lett_743_135563
PubMedID: 33359046
Gene_locus related to this paper: human-NDRG2

Title : The Burkholderia cenocepacia LysR-type transcriptional regulator ShvR influences expression of quorum-sensing, protease, type II secretion, and afc genes - O'Grady_2011_J.Bacteriol_193_163
Author(s) : O'Grady EP , Nguyen DT , Weisskopf L , Eberl L , Sokol PA
Ref : Journal of Bacteriology , 193 :163 , 2011
Abstract : Burkholderia cenocepacia is a significant opportunistic pathogen in individuals with cystic fibrosis. ShvR, a LysR-type transcriptional regulator, has previously been shown to influence colony morphology, biofilm formation, virulence in plant and animal infection models, and some quorum-sensing-dependent phenotypes. In the present study, it was shown that ShvR negatively regulates its own expression, as is typical for LysR-type regulators. The production of quorum-sensing signal molecules was detected earlier in growth in the shvR mutant than in the wild type, and ShvR repressed expression of the quorum-sensing regulatory genes cepIR and cciIR. Microarray analysis and transcriptional fusions revealed that ShvR regulated over 1,000 genes, including the zinc metalloproteases zmpA and zmpB. The shvR mutant displayed increased gene expression of the type II secretion system and significantly increased protease and lipase activities. Both ShvR and CepR influence expression of a 24-kb genomic region adjacent to shvR that includes the afcA and afcC operons, required for the production of an antifungal agent; however, the reduction in expression was substantially greater in the shvR mutant than in the cepR mutant. Only the shvR mutation resulted in reduced antifungal activity against Rhizoctonia solani. ShvR, but not CepR, was shown to directly regulate expression of the afcA and afcC promoters. In summary, ShvR was determined to have a significant influence on the expression of quorum-sensing, protease, lipase, type II secretion, and afc genes.
ESTHER : O'Grady_2011_J.Bacteriol_193_163
PubMedSearch : O'Grady_2011_J.Bacteriol_193_163
PubMedID: 20971902

Title : Whole-genome random sequencing and assembly of Haemophilus influenzae Rd - Fleischmann_1995_Science_269_496
Author(s) : Fleischmann RD , Adams MD , White O , Clayton RA , Kirkness EF , Kerlavage AR , Bult CJ , Tomb JF , Dougherty BA , Merrick JM , McKenney K , Sutton G , FitzHugh W , Fields C , Gocayne JD , Scott J , Shirley R , Liu LI , Glodek A , Kelley JM , Weidman JF , Phillips CA , Spriggs T , Hedblom E , Cotton MD , Utterback TR , Hanna MC , Nguyen DT , Saudek DM , Brandon RC , FineLD , Fritchman JL , Fuhrmann JL , Geoghagen NS , Gnehm CL , McDonald LA , Keith V , Small KV , Fraser CM , Smith HO , Venter JC
Ref : Science , 269 :496 , 1995
Abstract : An approach for genome analysis based on sequencing and assembly of unselected pieces of DNA from the whole chromosome has been applied to obtain the complete nucleotide sequence (1,830,137 base pairs) of the genome from the bacterium Haemophilus influenzae Rd. This approach eliminates the need for initial mapping efforts and is therefore applicable to the vast array of microbial species for which genome maps are unavailable. The H. influenzae Rd genome sequence (Genome Sequence DataBase accession number L42023) represents the only complete genome sequence from a free-living organism.
ESTHER : Fleischmann_1995_Science_269_496
PubMedSearch : Fleischmann_1995_Science_269_496
PubMedID: 7542800
Gene_locus related to this paper: haein-HI0193 , haein-metx , haein-pldb , haein-sfgh , haein-y1552 , haein-yfbb