Review
Immunology
Jenny A. Nguyen, Robin M. Yates
Summary: This study focuses on the process of phagolysosome formation following phagocytosis and its importance in microbial infection and disease. Multiple molecular pathways regulate the fusion of phagosomes with lysosomes, involving proteins such as Rab GTPases, tethering factors, and SNAREs.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Cell Biology
Julia Becker, Ariane Schleinitz, Christina Hermsen, Sabrina Rappold, Paul Saftig, Andreas Jeschke, Albert Haas
Summary: It has been found that Ca2+-driven fusion (CaFu) between membranes is faster and leads to larger fusion products compared to classical fusion, and it is not inhibited by established inhibitors of classical fusion. Ca2+ not only binds to membranes but also promotes membrane fusion. CaFu is proposed to correspond to the last step of phagosome-lysosome fusion, where an increase in Ca2+ concentration activates SNAREs for membrane fusion.
JOURNAL OF CELL SCIENCE
(2023)
Article
Immunology
Assirbad Behura, Mousumi Das, Ashish Kumar, Lincoln Naik, Abtar Mishra, Debraj Manna, Salina Patel, Amit Mishra, Ramandeep Singh, Rohan Dhiman
Summary: This study elucidates the contradictory roles of miR-30a-3p and miR-30a-5p in regulating IL-18 signaling by ESAT-6, affecting phagosome-lysosome fusion and intracellular killing of mycobacteria in dTHP-1 cells upon Calcimycin treatment.
INTERNATIONAL IMMUNOPHARMACOLOGY
(2021)
Article
Infectious Diseases
Hernan D. Cortes, Fernando A. Gomez, Sergio H. Marshall
Summary: The bacterium Piscirickettsia salmonis is a highly aggressive pathogen that has been affecting the Chilean salmon industry since 1989. While it can survive and replicate within fish macrophages, a purified extract of Quillaja saponaria (PQSE) has been found to reduce P. salmonis infection and promote immune response in an in vitro model. The results suggest that PQSE has specific anti-invasion and anti-intracellular replication effects in macrophages.
Article
Fisheries
Yating Liu, Yaotong Hao, Yufeng Liu, Guixing Wang, Zhongwei He, Yaxian Zhao, Zixiong Xu, Xiaochen Liu, Yufeng Wang, Chunguang Gong, Jilun Hou
Summary: The study highlights the important role of atp6v0b in the response of half-smooth tongue sole to Vibrio vulnificus infection, indicating its crucial role in regulating the immune response.
AQUACULTURE REPORTS
(2021)
Article
Immunology
Pramod Kumar Gupta, Priyanka Jahagirdar, Devavrat Tripathi, Padma V. Devarajan, Savita Kulkarni
Summary: The rapid emergence of antibiotic resistance in tuberculosis has led to limited resources for treating multi drug resistant (MDR) cases, necessitating the development of novel therapeutics. Curcumin, the active ingredient in turmeric, has been found to have anti-TB activity against MDR strains of Mycobacterium tuberculosis (MTB) in macrophages. In this study, it was discovered that curcumin treatment induced autophagy and apoptosis in uninfected and MTB-infected macrophages, leading to enhanced intracellular killing of MTB. Furthermore, encapsulating curcumin in polymeric nanoparticles resulted in improved bioavailability and synergistic effects with the drug isoniazid in combating MTB. These findings highlight the potential of curcumin-based host directed therapies as a valuable approach in the fight against tuberculosis.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Tian-ming Du, Hai-sheng Yang, Xu-feng Niu
Summary: Phosphorus is the main constituent element of minerals and fat in the body, playing a crucial role in bone and tooth formation as well as biomineralization process. The mutual transformation and regulation of different phosphorus-containing compounds are essential for bone formation and adaptation to various mechanical environments.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Microbiology
Liqiu Jia, Shanshan Sha, Shufeng Yang, Ayaz Taj, Yufang Ma
Summary: The study utilized a gene knockout strain of Mycobacterium smegmatis lacking the PMT gene to infect cells, demonstrating the important role of PMT in modulating the host's innate immune response, affecting macrophage responses to infection and phagosome-lysosome fusion.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Fisheries
Yanxia Wang, Quanchao Wang, Linlin Chen, Baoquan Li
Summary: Sea urchins are used as a model species for studying invertebrate diseases. This study used transcriptomic and proteomic analyses to uncover the molecular mechanisms of sea urchins during resistance to Vibrio coralliilyticus infection. The lysosome-phagosome pathway was found to play an important role in the immune response, and key genes/proteins in this pathway were identified. This research provides new insights into the immune regulatory mechanisms of sea urchins and helps identify potential genes/proteins for their immune responses.
FISH & SHELLFISH IMMUNOLOGY
(2023)
Article
Multidisciplinary Sciences
Kang Wu, Bo Yan, Douglas B. Lowrie, Tao Li, Xiao-Yong Fan
Summary: Immunofluorescence is essential for monitoring redistribution of proteins involved in phagosome-lysosome association pathway-relevant (P-LApr) proteins, but software for digitizing these signals is costly and limited. This study introduces a novel protocol using EzColocalization and custom Java code to successfully digitize signals of P-LApr proteins co-localized with phagosomes. The validation of the protocol shows significant differences in co-localization of LC3 with BCG strains in different cell types, emphasizing the need for caution in interpreting biological significance of results.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Michael S. Schappe, Marta E. Stremska, Gregory W. Busey, Taylor K. Downs, Philip Seegren, Suresh K. Mendu, Zachary Flegal, Catherine A. Doyle, Eric J. Stipes, Bimal N. Desai
Summary: Efficient clearance of apoptotic cells is crucial for various fields, but the signaling pathways involved are not well understood. A siRNA screen identified TRPM7 as an essential calcium ion channel in the process of efferocytosis. TRPM7-mediated cationic current is necessary for maintaining phagosomal acidification.
NATURE COMMUNICATIONS
(2022)
Article
Cell Biology
Yoshinari Nakatsuka, Masanori Matsumoto, Naohiro Inohara, Gabriel Nunez
Summary: Pseudomonas aeruginosa utilizes pathogen nitrite reductase nirD to evade neutrophil-mediated killing and promote its colonization in the lung.
Article
Multidisciplinary Sciences
Zeynep Derin Gokbayrak, Dipti Patel, Christopher Leonard Brett
Summary: Vacuoles in plants and fungi have critical roles in cell metabolism and osmoregulation. They change their morphology in response to stressors like drought, high salinity, or metabolic stress. This study focuses on understanding vacuole fission and its response to metabolism and osmoregulation. The researchers developed a new assay to measure yeast vacuole fission in vitro and used it to confirm that acetate stress triggers fission and inhibits fusion. They also found that hypertonic stress promotes fission while inhibiting fusion and identified the signaling pathways involved. This study provides a foundation for further research on the mechanisms of vacuole morphology changes in cell metabolism and osmoregulation.
Article
Food Science & Technology
Mengting Shang, Shuyan Niu, Xiaoru Chang, Jiangyan Li, Wenli Zhang, Menghao Guo, Tianshu Wu, Ting Zhang, Meng Tang, Yuying Xue
Summary: This study evaluated the effects of silver nanoparticles (AgNPs) on different stages of autophagy and found that they induced neuroinflammation and blocked autophagic flux. AgNPs hindered autophagic flux by inhibiting the fusion between autophagosomes and lysosomes, aggravating the neurotoxicity caused by AgNPs.
FOOD AND CHEMICAL TOXICOLOGY
(2022)
Article
Immunology
Seungwha Paik, Kyeong Tae Kim, In Soo Kim, Young Jae Kim, Hyeon Ji Kim, Seunga Choi, Hwa-Jung Kim, Eun-Kyeong Jo
Summary: In this study, researchers found that mycobacterial acyl carrier protein (AcpM) can suppress host cell death and promote bacterial growth by upregulating miRNA-155-5p expression. AcpM inhibits certain signaling pathways and fusion processes, interfering with host autophagy and lysosomal function, thus weakening the host's ability to eliminate Mycobacterium tuberculosis.
FRONTIERS IN IMMUNOLOGY
(2022)