Enhanced Extraction of Low-Molecular Weight DNA from Wastewater for Comprehensive Assessment of Antimicrobial Resistance

Jyotsna Karan; Sreya Mandal; Gulafsha Khan; Harshit Arya; Laasya Samhita

doi:10.3791/66899

항생제 내성에 대한 포괄적인 평가를 위해 폐수에서 저분자량 DNA 추출 강화

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Enhanced Extraction of Low-Molecular Weight DNA from Wastewater for Comprehensive Assessment of Antimicrobial Resistance

항생제 내성에 대한 포괄적인 평가를 위해 폐수에서 저분자량 DNA 추출 강화

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06:54 min

July 19, 2024

DOI: 10.3791/66899-v

Jyotsna Karan¹, Sreya Mandal¹, Gulafsha Khan¹, Harshit Arya¹, Laasya Samhita¹

¹Ashoka University

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Overview

This study develops a novel technique for assessing environmental antimicrobial resistance (AMR) by enriching low-molecular-weight extracellular DNA from wastewater samples. The protocol allows for the detection of genomic and horizontally transferred AMR genes, offering a cost-effective, kit-free method for environmental AMR tracking.

Key Study Components

Research Area

Antimicrobial resistance (AMR)
Environmental microbiology
Molecular genetics

Background

The evolution and transmission of antibiotic resistance in environmental settings
Current deficiencies in high yield extraction techniques of low molecular weight DNA
The importance of tracking AMR for public health

Methods Used

PCR and shotgun sequencing for microbial diversity profiling
Use of polyethylene glycol and sodium chloride for DNA extraction
Advanced AMR detection via metabar coding and gene-based panels

Main Results

Enhanced extraction of linear and low molecular weight DNA
Successful capture of both genomic and free DNA fractions associated with AMR
Foundational work for future developments in environmental AMR detection techniques

Conclusions

The study provides an efficient method for assessing environmental AMR
Promotes further research into both genetic and non-genetic factors contributing to antibiotic resistance

Frequently Asked Questions

What is the significance of low-molecular-weight extracellular DNA in AMR?

Low-molecular-weight extracellular DNA serves as a reservoir for AMR genes, thus its enrichment allows better detection and understanding of AMR dynamics.

How does this protocol enhance DNA extraction?

The protocol utilizes polyethylene glycol and sodium chloride to increase the yield of low molecular weight DNA during extraction from wastewater samples.

What are the applications of this research?

This research can help in monitoring trends in AMR, improving public health responses, and developing environmental policies.

What genetic mechanisms are being explored in relation to AMR?

The study compares contributions of horizontal gene transfer and genomic mutations to the development of antibiotic resistance.

Can this technique be developed for commercial use?

Yes, the protocol is designed to be cost-effective and potentially kit-free with further optimization.

How will the results impact future biological research?

This method opens avenues for more comprehensive studies on AMR in various environments, bridging gaps in genetic and environmental research.

What are the future directions for the authors' research?

Future studies will focus on expanding the database for tracking spatial-temporal variations in AMR and exploring non-genetic resistance mechanisms.

여기에서는 저분자량 세포외 DNA의 비율을 향상시켜 환경적 항생제 내성(AMR)을 평가하는 간단한 기술을 제시합니다. 20%-30% PEG 및 1.2M NaCl로 사전 처리하면 게놈 및 수평 전달 AMR 유전자를 모두 검출할 수 있습니다. 이 프로토콜은 추가 최적화를 통해 키트가 없는 프로세스에 적합합니다.

우리는 항생제 내성의 기저에 있는 진화, 전달 및 분자 메커니즘에 관심이 있습니다. 구체적으로 말하자면, 이 논문에 담긴 작업은 환경 저항에 대한 우리의 관심에서 비롯된 것입니다. 현재 우리는 1년 분량의 데이터를 사용하여 항생제 내성의 공간적 변화를 추적하기 위한 로컬 데이터베이스를 구축하려고 합니다.

배양 기반 기술과 유전체학의 조합은 항생제 내성을 검출하고 모니터링하는 데 사용됩니다. 샘플의 DNA는 PCR 또는 샷건 염기서열 분석을 거쳐 미생물 다양성을 프로파일링하고 내성 유전자를 검출합니다. 또한 메타바코딩 및 유전자 기반 AMR 패널은 고급 AMR 검출에 사용됩니다.

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