anaerobic bacterial isolation from chicken digesta as a cultivation improvement

<meta charset="utf8"></head><body>鸡胃肠道中未培养微生物多样性的培养策略

The resurgence of cultivation in studying microorganisms has complemented insights from metagenomic studies by providing material to test metabolic hypotheses that were previously only partially described and quantified. Cultivation of intestinal bacteria provides material to sustain future research on microbial-host interactions, facilitate targeted colonization studies, and improve molecular interaction studies1,2,3. The knowledge gained about gastrointestinal microorganisms has improved animal nutrition and welfare by influencing diet formulations and enhancing nutrient availability4. This understanding has contributed to performance improvements in utilizing prebiotic and probiotic interaction. However, in-depth research is required to gain a complete understanding of how biochemical and physicochemical conditions interact and impact the microbial profile and its structure. To achieve this objective, cultivation remains imperative, serving as a crucial tool to delve into the intricate dynamics of microbial communities within the gastrointestinal environment.
In contrast to the extensive research on microbes associated with the human gut and clinical cultivation studies5, reports on microorganisms from livestock have predominantly utilized a limited range of media for isolation, potentially constraining the diversity of isolates2,3. Furthermore, improvements in the formulation of media and studies on the interaction of phosphate and salts with agar, as elucidated by Tanaka et al. and Kawasaki et al., have not yet been implemented for gut-microbiome studies6,7,8,9.
Considered a semi-essential substance, myo-inositol (MI) has been reported to play a pivotal role in diverse metabolic, physiological, and regulatory processes10,11. These include involvement in bone mineralization, breast muscle development, cellular signaling, promotion of ovulation and fertility, modulation of neuronal signaling, and acting as a regulator of glucose homeostasis and insulin regulation in poultry10,11. MI plays a role as a precursor through its interconversion within pivotal biochemical processes, including the glycolysis/gluconeogenesis process, the citric acid cycle, and the pentose phosphate pathway. Additionally, it also serves as a precursor of phosphatidylinositol (PI), which is further involved in glycerophospholipid metabolism12. Few investigations have reported that the metabolization of MI leads to alterations in bone stability and animal performance. This includes enhancements in feed conversion rate and body weight gain, demonstrating its impact after absorption and utilization within the animal13,14. However, the pathway for MI metabolization and its impact on poultry metabolism remains elusive15. Furthermore, few studies propose a potential role of bacteria in MI utilization, particularly in regions of high metabolic activity such as the ileum16,17,18,19.
Efforts on cultivating bacteria from the GIT of animals aim to enhance genomic databases and expand research, verify genome-based hypothesis, and understand the ecological importance of these resources20. The objective of this work is to improve strategies for bacterial cultivation from the GIT of chicken to enhance the isolation diversity and the targeted isolation of an ecological group of interest that assimilate and metabolize myo-inositol.

<meta charset="utf8"></head><body>作者聚焦：推进家禽肠道细菌培养

加强鸡胃肠道厌氧菌培养的策略

从鸡消化中分离厌氧菌作为培养改进

anaerobic-bacterial-isolation-from-chicken-digesta-as-cultivation

Research

JoVE Journal

Biology

Anaerobic Bacterial Isolation from Chicken Digesta as a Cultivation Improvement

59 次观看. 首先，将 250 毫升每种碳水化合物、蛋白质、琼脂和矿物质溶液混合在一个高压灭菌器玻璃瓶中。用带孔和橡胶塞的盖子密封瓶子。用氮气对混合物进行脱气后，将其倒入厌氧站内的无菌培养皿中。接下来，将鸡肠样品转移到含有氮气、二氧化碳和氢气的瓶装气体混合物的厌氧站。用一对无菌镊子，将肠道样品从 Hungate 管转移到无菌培养皿中。?...

视频: 从鸡消化中分离厌氧菌作为培养改进

Strategies to Enhance Cultivation of Anaerobic Bacteria from Gastrointestinal Tract of Chicken

The gastrointestinal tract (GIT) of chicken is a complex ecosystem harboring trillions of microbes that play a pivotal role in the host&#39;s physiology, digestion, nutrient absorption, immune system maturation, and prevention of pathogen intrusion. For optimal animal health and productivity, it is imperative to characterize these microorganisms and comprehend their role. While the GIT of poultry holds a reservoir of microorganisms with potential probiotic applications, most of the diversity remains unexplored. To enhance our understanding of uncultured microbial diversity, concerted efforts are required to bring these microorganisms into culture. Isolation and cultivation of GIT-colonizing microorganisms yield reproducible material, including cells, DNA, and metabolites, offering new insights into metabolic processes in the environment. Without cultivation, the role of these organisms in their natural settings remains unclear and limited to a descriptive level. Our objective is to implement cultivation strategies aimed at improving the isolation of a diverse range of anaerobic microbes from the chicken&#39;s GIT, leveraging multidisciplinary knowledge from animal physiology, animal nutrition, metagenomics, feed biochemistry, and modern cultivation strategies. Additionally, we aim to implement the use of proper practices for sampling, transportation, and media preparation, which are known to influence isolation success. Appropriate methodologies should ensure a consistent oxygen-free environment, optimal atmospheric conditions, appropriate host incubation temperature, and provision for specific nutritional requirements in alignment with their distinctive needs. By following these methodologies, cultivation will not only yield reproducible results for isolation but will also facilitate isolation procedures, thus fostering a comprehensive understanding of the intricate microbial ecosystem within the chicken&#39;s GIT.

The protocol presents two methodologies to improve the isolation of anaerobic intestinal bacteria. The first focuses on the isolation of a diverse range of bacteria using different culture media. The second focuses on the cultivation steps of a specific microbial group, possibly assimilating myo-inositol, to fully comprehend its ecological significance.

The gastrointestinal tract (GIT) of chicken is a complex ecosystem harboring trillions of microbes that play a pivotal role in the host&#39;s physiology, ...