Joo, Woo Hong;Bae, Yun-Ui;Kim, Da Som;Kim, Dong Wan
Journal of Life Science
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v.30
no.1
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pp.88-95
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2020
Using a random arbitrarily primed polymerase chain reaction, messenger RNA expression levels were assessed after exposure to 10% (v/v) toluene for 8 hr in solvent-tolerant Pseudomonas sp. BCNU 106. Among the 100 up-expressed products, 50 complementary DNA fragments were confirmed to express repeatedly; these were cloned and then sequenced. Blast analysis revealed that toluene stimulated an adaptive increase in the gene expression level in association with transcriptions such as LysR family of transcriptional regulators and RNA polymerase factor sigma-32. The expression of catalase and Mn2+/Fe2+ transporter genes functionally associated with inorganic ion transport and metabolism increased, and the increased expression of type IV pilus assembly PilZ and multi-sensor signal transduction histidine kinase genes, functionally categorized into signal transduction and mechanisms, was also demonstrated under toluene stress. The gene expression level of beta-hexosaminidase in association with carbohydrate transport and metabolism increased, and those of DNA polymerase III subunit epsilon, DNA-3-methyladenine glycosylase II, DEAD/DEAH box helicase domain-containing protein, and ABC transporter also increased after exposure to toluene in DNA replication, recombination, and repair, and even in defense mechanism. In particular, the RNAs corresponding to the ABC transporter, Mn2+/Fe2+ transporter, and the β-hexosaminidase gene were confirmed to be markedly induced in the presence of 10% toluene. Thus, defense mechanism, cellular ion homeostasis, and biofilm formation were shown as essential for toluene tolerance in Pseudomonas sp. BCNU 106.
Backgrounds : In recent years, asthma has become recognized as a chronic inflammatory disease associated pathologically with airway epithelial inflammation and airway remodeling. Objectives : To evaluate the different effects of Hirudo depending upon pharmaceutical manufactures on the expression and the activities of IL-6 and GM-CSF in airway epithelial cells, samples of Hirudo(水蛭), Hirudo toasted with Talcum(水蛭滑石炒) and Hirudo toasted with Ephedrae Herba(水蛭麻黃炒) were tested. Methods : After inducing enhanced messenger RNA(mRNA) expression and secretion of each cytokine by tumor necrosis factor-alpha(10 ng/ml) treatment, cultured human bronchial epithelial cell line BEAS-2B was added to each sample$(l,\;10,\;100\;&\;1000\;{\mu}g/ml)$. Subsequently, DNA activities were analyzed. Specifically mRNA expression and culture supernatants(protein levels) of IL-6 and GM-CSF from BEAS-2B cells, were analyzed using luciferase reporter gene assay, reverse transcription-polymerase chain reaction(RT-PCR) analysis and enzyme-linked immunosorbent assay. Results : Hirudo toasted with Ephedrae Herba(水蛭麻黃炒) and Hirudo(水蛭) inhibited IL-6 activities in BEAS-2B cells remarkably, and inhibited mRNA expression levels and protein levels in supernatant of IL-6 and GM-CSF at various concentrations, significantly(p<0.05). However, Hirudo toasted with Talcum(水蛭滑石炒) had no effect on mRNA expression levels and showed a slight inhibitory effect on GM-CSF protein levels in supernatant of culture medium. Conclusions : These results strongly suggest that Hirudo toasted with Ephedrae Herba(水蛭麻黃炒) and Hirudo(水蛭) would be serve as effective medicaments in the treatment of airway inflammation and remodeling of asthmatic patients.
Objective: The purpose of this study is to explain the effect and reciprocal action among tumor necrosis factor (TNF) like weak inducer of apoptosis (TWEAK), fibroblast growth factor-inducible 14 (Fn14), and transforming growth factor-$\beta1$ (TGF-$\beta1$) on degeneration of human intervertebral disc (IVD). Methods: Human intervertebral disc tissues and cells were cultured with Dulbecco's Modified Eagle's Medium/Nutrient F-12 Ham (DMEM/F-12) media in $37^{\circ}C$, 5% $CO_2$ incubator. When IVD tissues were cultured with TWEAK, Fn14 that is an antagonistic receptor for TWEAK and TGF-$\beta1$, the level of sulfated glycosaminoglycan (sGAG) was estimated by dimethyl methyleneblue (DMMB) assay and sex determining region Y (SRY)-box 9 (Sox9) and versican messenger ribonucleic acid (mRNA) levels were estimated by reverse transcriptase polymerase chain reaction (RT-PCR). Results: When human IVD tissue was cultured for nine days, the sGAG content was elevated in proportion to culture duration. The sGAG was decreased significantly by TWEAK 100 ng/mL, however, Fn14 500 ng/mL did not change the sGAG production of IVD tissue. The Fn14 increased versican and Sox9 mRNA levels decreased with TWEAK in IVD tissue TGF-$\beta1$ 20 ng/mL elevated the sGAG concentration 40% more than control. The sGAG amount decreased with TWEAK was increased with Fn14 or TGF-$\beta1$ but the result was insignificant statistically. TGF-$\beta1$ increased the Sox9 mRNA expression to 180% compared to control group in IVD tissue. Sox9 and versican mRNA levels decreased by TWEAK were increased with TGF-$\beta1$ in primary cultured IVD cells, however, Fn14 did not show increasing effect on Sox9 and versican. Conclusion: This study suggests that TWEAK would act a role in intervertebral disc degeneration through decreasing sGAG and the mRNA level of versican and Sox9.
Purpose: Mulberry (Morus alba L.) fruit is widely grown in Asia and consumed as fresh fruit, jam, and juices. The fruit has beneficial health effects, including anti-diabetic, anti-tumor, and anti-obesity properties. However, the mechanisms by which mulberry fruit juice powder (MJ) regulates inflammatory microRNAs (miRs) are not yet known. This study investigated the effect of mulberry fruit juice powder on the regulation of inflammation and miR-132/143 during 3T3-L1 adipocyte differentiation. Methods: The 3T3-L1 cells were induced to differentiate for 2 days and then treated with various concentrations of MJ for 7 days. Cytotoxicity was determined by evaluating cell viability using a water-soluble tetrazolium salt-8 assay kit. Intracellular lipid accumulation was evaluated by oil-red O staining. The levels of the expression of genes involved in adipogenesis and inflammation, and miR-132/143 were measured by quantitative real-time polymerase chain reactions. Results: MJ showed no cytotoxic effect on 3T3-L1 adipocytes at concentrations below 100 ng/mL. Intracellular lipid accumulation was reduced by MJ treatment at concentrations of 100 ng/mL. The messenger RNA (mRNA) levels of proliferator-activated receptor-γ, cytosine-cytosine-adenosine-adenosine-thymidine/enhancer-binding protein-α, and adipocyte protein 2, which are involved in adipogenesis, were suppressed by MJ. A reduction was also seen in mRNA levels of genes related to the inflammatory response, such as tumor necrosis factor-α, interleukin-6, monocyte chemoattractant protein-1, and inducible nitric oxide synthase. The expression of the inflammatory miR-132 and miR-143 was also decreased by MJ. Conclusion: These results suggest that MJ may suppress adipogenesis and inflammation through the regulation of miR-132/143 expression in 3T3-L1 adipocytes. Thus, MJ may be useful as a food agent that prevents obesity-associated inflammation.
Purpose: This study was carried out to investigate the effect of amaranth seed extracts on glycemic regulation in HepG2 cells. The 80% ethanol extracts of amaranth seeds were used to evaluate α-amylase and α-glucosidase activities, cell viability, glucose uptake and messenger RNA (mRNA) expression levels of acetyl-CoA carboxylase (ACC), glucose transporter (GLUT)-2, GLUT-4, insulin receptor substrate (IRS)-1 and IRS-2. Methods: The samples were prepared and divided into 4 groups, including germinated black amaranth (GBA), black amaranth (BA), germinated yellow amaranth (GYA) and yellow amaranth (YA). Glucose hydrolytic enzyme, α-amylase and α-glucosidase activities were examined using a proper protocol. In addition, cell viability was measured by MTT assay. Glucose uptake in cells was measured using an assay kit. The mRNA expression levels of ACC, GLUT-2, GLUT-4, IRS-1 and IRS-2 were measured by reverse transcription polymerase chain reaction. Results: The inhibitory activities of α-amylase and α-glucosidase were highly observed in GBA, followed by BA, GYA and YA. Similar results were observed for glucose. The GBA effect was similar compared to the positive control group. The mRNA expression levels of ACC, GLUT-2, GLUT-4, IRS-1, and IRS-2 were significantly increased. The potential hypoglycemic effects of amaranth seed extracts were observed due to the increase in glucose metabolic enzyme activity, and glucose uptake was mediated through the upregulation of ACC, GLUT-2, GLUT-4, IRS-1, and IRS-2 expression levels. Conclusion: Our findings suggest that the amaranth seed is a potential candidate to prevent a diabetes. The present study demonstrated the possibility of using amaranth seeds, especially GBA and BA for glycemic control.
Objective : To assess the effect of bone marrow mononuclear cells (BMMNCs) transplantation in the expression of nuclear factor-${\kappa}B$ (NF-${\kappa}B$) in spinal cord injury (SCI) in rats. Methods : BMMNCs were isolated from tibia and femur by a density gradient centrifugation. After establishment of acute transection SCI, rats were divided into experiment (BMMNCs), experiment control (0.1 M PBS infused) and sham surgery groups (laminectomy without any SCI). Locomotor function was assessed weekly for 5 weeks post-injury using BBB locomotor score and urinary bladder function daily for 4 weeks post-injury. Activity of NF-${\kappa}B$ in spinal cord was assessed by immunohistochemistry and reverse transcriptase polymerase chain reaction. Results : At each time point post-injury, sham surgery group had significantly higher Basso, Beattie, Bresnahan locomotor and urinary bladder function scores than experiment and experiment control group (p<0.05). At subsequent time interval there were gradual improvement in both experiment and experiment control group, but experiment group had higher score in comparison to experiment control group (p<0.05). Comparisons were also made for expression of activated NF-${\kappa}B$ positive cells and level of NF-${\kappa}B$ messenger RNA in spinal cord at various time points between the groups. Activated NF-${\kappa}B$ immunoreactivity and level of NF-${\kappa}B$ mRNA expression were significantly higher in control group in comparison to experiment and sham surgery group (p<0.05). Conclusion : BMMNCs transplantation attenuates the expression of NF-${\kappa}B$ in injured spinal cord tissue and thus helps in recovery of neurological function in rat models with SCI.
Background: MicroRNAs (miRNAs) are small non-coding RNA molecules found in multicellular eukaryotes which are implicated in development of cancer, including cutaneous squamous cell carcinoma (cSCC). Expression is controlled by transcription factors (TFs) that bind to specific DNA sequences, thereby controlling the flow (or transcription) of genetic information from DNA to messenger RNA. Interactions result in biological signal control networks. Materials and Methods: Molecular components involved in cSCC were here assembled at abnormally expressed, related and global levels. Networks at these three levels were constructed with corresponding biological factors in term of interactions between miRNAs and target genes, TFs and miRNAs, and host genes and miRNAs. Up/down regulation or mutation of the factors were considered in the context of the regulation and significant patterns were extracted. Results: Participants of the networks were evaluated based on their expression and regulation of other factors. Sub-networks with two core TFs, TP53 and EIF2C2, as the centers are identified. These share self-adapt feedback regulation in which a mutual restraint exists. Up or down regulation of certain genes and miRNAs are discussed. Some, for example the expression of MMP13, were in line with expectation while others, including FGFR3, need further investigation of their unexpected behavior. Conclusions: The present research suggests that dozens of components, miRNAs, TFs, target genes and host genes included, unite as networks through their regulation to function systematically in human cSCC. Networks built under the currently available sources provide critical signal controlling pathways and frequent patterns. Inappropriate controlling signal flow from abnormal expression of key TFs may push the system into an incontrollable situation and therefore contributes to cSCC development.
Park, Jung-Pyo;Shin, Hye Joo;Park, Suk-Gyun;Oh, Hee-Kyun;Choi, Choong-Ho;Park, Hong-Ju;Kook, Min-Suk;Ohk, Seung-Ho
Journal of Microbiology and Biotechnology
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v.25
no.3
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pp.393-398
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2015
Aptamers are composed of single-stranded oilgonucleotides that can selectively bind desired molecules. It has been reported that RNA or DNA could act as not only a genetic messenger but also a catalyst in metabolic pathways. RNA aptamers (average sizes 40-50 bp) are smaller than antibodies and have strong binding capacities to target molecules, similar to antigenantibody interactions. Once an aptamer was selected, it can be readily produced in large quantities at low cost. The objectives of this study are to screen and develop aptamers specific to oral pathogens such as Porphyromonas gingivalis, Treponema denticola, and Streptococcus mutans. The bacterial cell pellet was fixed with formaldehyde as a target molecule for the screening of aptamers. The SELEX method was used for the screening of aptamers and a modified western blot analysis was used to verify their specificities. Through SELEX, 40 kinds of aptamers were selected and the specificity of the aptamers to the bacterial cells was confirmed by modified western blot analysis. Through the SELEX method, 40 aptamers that specifically bind to oral pathogens were screened and isolated. The aptamers showed possibility as effective candidates for the detection agents of oral infections.
Background: Metal-responsive transcription factor-1 (MTF-1) is a key transcriptional regulator playing crucial roles in metal homeostasis and cellular adaptation to diverse oxidative stresses. In order to understand cellular pathways associated with metal regulation and stress responses in Pacific abalone (Haliotis discus hannai), this study was aimed to isolate the genetic determinant of abalone MTF-1 and to examine its expression characteristics under basal and experimentally stimulated conditions. Results: The abalone MTF-1 shared conserved features in zinc-finger DNA binding domain with its orthologs; however, it represented a non-conservative shape in presumed transactivation domain region with the lack of typical motifs for nuclear export signal (NES) and Cys-cluster. Abalone MTF-1 promoter exhibited various transcription factor binding motifs that would be potentially related with metal regulation, stress responses, and development. The highest messenger RNA (mRNA) expression level of MTF-1 was observed in the testes, and MTF-1 transcripts were detected during the entire period of embryonic and early ontogenic developments. Abalone MTF-1 was found to be Cd inducible and highly modulated by heat shock treatment. Conclusion: Abalone MTF-1 possesses a non-consensus structure of activation domains and represents distinct features for its activation mechanism in response to metal overload and heat stress. The activation mechanism of abalone MTF-1 might include both indirect zinc sensing and direct de novo synthesis of transcripts. Taken together, results from this study could be a useful basis for future researches on stress physiology of this abalone species, particularly with regard to heavy metal detoxification and thermal adaptation.
Objectives : In present study, we investigated the effects of ginsenoside Rg3 on early-stage inflammatory response in spinal cord compression of rodents. Methods : Spinal cord injury(SCI) was induced by a vascular clip method(30 g, 5 min) on the spinal cord of mice. Rg3 was treated orally at 1 hour prior to the SCI induction. Messenger ribonucleic acid(mRNA) expression of tumor necrosis factor-${\alpha}$(TNF-${\alpha}$), interleukin-1${\beta}$(IL-1${\beta}$), interleukin-6(IL-6) and cyclooxygenase-2(COX-2) was measured by the real-time polymerase chain reaction(RT-PCR). Microglia in the spinal cord tissue, neurophils and COX-2 in the peri-lesion and inducible nitric oxide synthase(iNOS) expression in the ventral horn of SCI induced rats were measured by immunohistochemical stain. Results : 1. Rg3 significantly reduced the mRNA expression of TNF-${\alpha}$, IL-1${\beta}$, and COX-2 in the spinal cord tissue compared with SCI group(p<0.05, p<0.01). 2. Rg3 significantly reduced the total number of activated microglia and proportion of phagocytic form in the total activated microglia compared with SCI group(p<0.05, p<0.01). 3. Rg3 significantly reduced myeloperoxidase(MPO) positive neurophil in the peri-lesion compared with SCI group(p<0.05). 4. Rg3 reduced the COX-2 expression in the tissue and motor neurons compared with SCI group. 5. Rg3 significantly reduced iNOS positive motor neurons in the ventral horn compared with SCI group(p<0.01). Conclusions : In conclusion, we demonstrated at first that treatment of ginsenoside Rg3 could reduce significantly the levels of inflammatory mediators in a spinal cord compression model of rodents. Therefore, these results suggested that ginsenoside Rg3 may be a useful antimiflamatory therapeutic candidate for SCI.
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