microbial cell
Recently Published Documents


TOTAL DOCUMENTS

687
(FIVE YEARS 229)

H-INDEX

51
(FIVE YEARS 8)

2022 ◽  
pp. 985-1011
Author(s):  
Hemansi ◽  
Raj Kamal Vibhuti ◽  
Rishikesh Shukla ◽  
Rishi Gupta ◽  
Jitendra Kumar Saini

Nutraceuticals are the food ingredients which have a proven beneficial effect on human health. These include low calories sugars, proteins and vitamins B complex, etc. Microorganisms, such as Lactococcus lactis, are ideal microbial cell factories for the production of these nutraceuticals. Developments in the genetic engineering of food-grade microorganisms have been very helpful for enhanced production or overexpression of nutraceuticals. This chapter describes the use of food grade microorganisms in industrial production of nutraceuticals. The main emphasis is on industrial production of these beneficial nutraceuticals by food grade microorganism. The diversity of microbial cell types, various approaches for improved nutraceutical production through process optimization as well as strain improvement of the producing microorganisms are discussed.


Author(s):  
Jia Li ◽  
Jun Li ◽  
Yuetian Yu ◽  
Rongsheng Wang ◽  
Mi Zhou ◽  
...  

Abstract Objectives This study aimed to explore the clinical utility of circulating microbial cell-free DNA (cfDNA) sequencing as a non-invasive approach for diagnosing Pneumocystis jirovecii pneumonia (PJP) in immunocompromised patients with rheumatic disease (RD). Methods The study included 72 RD patients with suspected lung infections admitted to Renji hospital. Eighteen individuals were diagnosed with PJP, and 54 patients without PJP were enrolled as control group. All patients had undergone pulmonary computed tomography scans, and blood and respiratory tract specimens had been subjected to metagenomic next-generation sequencing (mNGS) and conventional microbiological tests. The clinical and laboratory parameters were collected and efficacy of circulating microbial cfDNA of PJP was evaluated. Results Of the 18 patients with PJP, the average age was 53.0 years and the median time between RD diagnosis and PJP presentation was 126 days (IQR 84.0–176.3). Low circulating CD4+ cell counts and a lack of PJP prophylaxis were observed in the patients. Metagenomic NGS of circulating microbial cfDNA was performed in 69 patients including 15 cases with PJP and 54 controls. Twelve (80%) of 15 analysed blood samples contained Pneumocystis jirovecii (PJ) sequences in PJP group with PJ not detected among controls. There was a significant difference between PJP and non-PJP groups (p < 0.001) with a sensitivity of 83.3% and specificity of 100% when using plasma cfDNA sequencing. Higher β-D-glucan levels were found in patients with positive results for PJ in plasma cfDNA sequencing. Conclusion Metagenomic NGS of circulating microbial cfDNA is a potential tool for diagnosing PJP in RD patients.


Author(s):  
Jinho Yeom ◽  
Jong Seong Park ◽  
Seung-Woon Jung ◽  
Sumin Lee ◽  
Hyukjin Kwon ◽  
...  

2021 ◽  
Vol 227 ◽  
pp. 112887
Author(s):  
Henry Moll ◽  
Astrid Barkleit ◽  
Laura Frost ◽  
Johannes Raff

Author(s):  
Zeinu Mussa Belew ◽  
Michal Poborsky ◽  
Hussam Hassan Nour-Eldin ◽  
Barbara Ann Halkier

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Joana Séneca ◽  
Andrea Söllinger ◽  
Craig W. Herbold ◽  
Petra Pjevac ◽  
Judith Prommer ◽  
...  

AbstractGlobal warming increases soil temperatures and promotes faster growth and turnover of soil microbial communities. As microbial cell walls contain a high proportion of organic nitrogen, a higher turnover rate of microbes should also be reflected in an accelerated organic nitrogen cycling in soil. We used a metatranscriptomics and metagenomics approach to demonstrate that the relative transcription level of genes encoding enzymes involved in the extracellular depolymerization of high-molecular-weight organic nitrogen was higher in medium-term (8 years) and long-term (>50 years) warmed soils than in ambient soils. This was mainly driven by increased levels of transcripts coding for enzymes involved in the degradation of microbial cell walls and proteins. Additionally, higher transcription levels for chitin, nucleic acid, and peptidoglycan degrading enzymes were found in long-term warmed soils. We conclude that an acceleration in microbial turnover under warming is coupled to higher investments in N acquisition enzymes, particularly those involved in the breakdown and recycling of microbial residues, in comparison with ambient conditions.


Sign in / Sign up

Export Citation Format

Share Document