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Rajendran Vijayabharathi,Per Bruheim,Trygve Andreassen,Duraisamy Senthil Raja,Palanisamy Bruntha Devi,Sathyaseelan Sathyabama,Venkatesan Brindha Priyadarisini 한국미생물학회 2011 The journal of microbiology Vol.49 No.6
A new actinomycete strain, isolated from humus soils in the Western Ghats, was found to be an efficient pigment producer. The strain, designated AAA5, was identified as a putative Streptomyces aurantiacus strain based on cultural properties, morphology, carbon source utilization, and analysis of the 16S rRNA gene. The strain produced a reddish-brown pigmented compound during the secondary metabolites phase. A yellow compound was derived from the extracted pigment and was identified as the quinone-related antibiotic resistomycin based on ultraviolet–visible spectrophotometry, fourier transform infrared spectroscopy, liquid chromatography and mass spectroscopy, and nuclear magnetic resonance analyses. The AAA5 strain was found to produce large quantities of resistomycin (52.5 mg/L). It showed potent cytotoxic activity against cell lines viz. HepG2 (hepatic carcinoma) and HeLa (cervical carcinoma) in vitro, with growth inhibition (GI_50) of 0.006 and 0.005 μg/ml, respectively. The strain also exhibited broad antimicrobial activities against both Gram-positive and Gram-negative bacteria. Therefore, AAA5 may have great potential as an industrial resistomycin-producing strain.
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( Elisabeth K Steinsvik ),( Jørgen Valeur ),( Trygve Hausken ),( Odd H Gilja ) 대한소화기 기능성질환·운동학회 2020 Journal of Neurogastroenterology and Motility (JNM Vol.26 No.1
Background/Aims Dyspeptic symptoms are common in patients with functional gastrointestinal (GI) disorders, and may be related to visceral hypersensitivity. We aim to explore the relation between visceral hypersensitivity by using an ultrasonographic meal test and questionnaires in patients with irritable bowel syndrome (IBS) and/or functional dyspepsia (FD). Methods Patients (FD, n = 94; IBS, n = 88; IBS + FD, n = 66, healthy controls [HC], n = 30) were recruited consecutively and examined with ultrasound of the proximal and distal stomach after drinking 500 mL of a low caloric meat soup, and scored dyspeptic symptoms on a visual analogue scale (0-100 mm) before and after the meal. Psychological symptoms were assessed by Visceral Sensitivity Index (GI specific anxiety, n = 58), and Eysenck’s Personality Questionnaire-neuroticism (EPQ-N, n = 203). Results Patients with IBS and/or FD reported higher levels of nausea, upper GI discomfort, and epigastric pain both before and after a liquid meal compared to HC (P < 0.001), and had a larger antral area in a fasting state, compared to HC. We found impaired accommodation in 33% of the patients with FD, however ultrasound measurements and symptom severity did not correlate. Symptoms of epigastric pain, fullness and upper GI discomfort positively correlated to Visceral Sensitivity Index and EPQ-N in a fasting state, but not postprandially. Conclusions Nausea, upper GI discomfort, and epigastric pain was common in patients with IBS and FD. Both patient groups had enlarged antral area in a fasting state compared to HC. Discomfort and pain were associated to GI specific anxiety and neuroticism in a fasting state.
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Anne Tondervik,Simone Balzer,Tone Haugen,Håvard Sletta,Marit Rode,Karine Lindmo,Trond E. Ellingsen,Trygve Brautaset 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.4
The Norwegian salmonid alphavirus (NSAV)infects farmed Atlantic salmon and rainbow trout, causes pancreas disease and leads to economic losses and fish health issues for the aquaculture. Vaccines are available,but recurring infection outbreaks at Norwegian fish farms have led to endeavours in finding solutions for increased prevention. The NSAV E1 and E2 envelope proteins are potential targets for production of recombinant subunit vaccines and for generation of antibodies for diagnostics. Efficient expression of target proteins is necessary for these applications, and here we present a new strategy for expressing this kinds of viral proteins. We show that 5'-terminal fusion of signal sequences OmpA and CSP to the e1 and e2 genes and removal of the C-terminal hydrophobic interaction and transmembrane domains of E1 and E2 leads to significantly increased expression levels. Recombinant Escherichia coli strains for high-level production of E1 and E2 harbouring these modifications were established using the inducible XylS/Pm expression cassette. Furthermore,reduction of temperature to 16oC after induction leads to 4-fold increase in production for E1, and under high-celldensity cultivations we obtained production levels up to 2.3 g/L. We also show that these proteins can be purified from inclusion bodies by affinity chromatography. This demonstrates the present approach as promising for large scale production of such viral proteins.
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