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25 Results Found

  • Article
  • Open Access
789 Views
13 Pages

OmpR Indirectly Regulates Biosynthesis of Xenocoumacin 1 in Xenorhabdus nematophila

  • Yunfei Han,
  • Xintong Zhao,
  • Mengru He,
  • Shujing Zhang,
  • Gaijuan Tang and
  • Yonghong Wang

Xenorhabdus nematophila has excellent potential for application in both medicine and agriculture due to its various active secondary metabolites. The transcriptional regulator OmpR negatively regulates Xenocoumacin 1 (Xcn1), which has wide antim...

  • Article
  • Open Access
33 Citations
5,190 Views
19 Pages

Immune Response of Drosophila suzukii Larvae to Infection with the Nematobacterial Complex Steinernema carpocapsae–Xenorhabdus nematophila

  • Anna Garriga,
  • Maristella Mastore,
  • Ana Morton,
  • Fernando Garcia del Pino and
  • Maurizio Francesco Brivio

28 March 2020

Entomopathogenic nematodes have been proposed as biological agents for the control of Drosophila suzukii, an invasive pest of small-stone and soft-skinned fruits. Larvae of the fly are susceptible to Steinernema carpocapsae infection but the reaction...

  • Article
  • Open Access
9 Citations
4,522 Views
19 Pages

In Vivo Effects of A Pro-PO System Inhibitor on the Phagocytosis of Xenorhabdus Nematophila in Galleria Mellonella Larvae

  • Andrea De Lerma Barbaro,
  • Marzia B. Gariboldi,
  • Maristella Mastore,
  • Maurizio F. Brivio and
  • Stefano Giovannardi

22 August 2019

Xenorhabdus nematophila is a Gram-negative bacterium symbiont of the entomopathogen nematode Steinernema carpocapsae whose immunosuppressive properties over host’s immune response have been thoroughly investigated. In particular, live X. nemato...

  • Article
  • Open Access
7 Citations
3,018 Views
14 Pages

Insecticidal Activity of Chitinases from Xenorhabdus nematophila HB310 and Its Relationship with the Toxin Complex

  • Jia Liu,
  • Hui Bai,
  • Ping Song,
  • Ziyan Nangong,
  • Zhiping Dong,
  • Zhiyong Li and
  • Qinying Wang

18 September 2022

Xenorhabdus nematophila HB310 secreted the insecticidal protein toxin complex (Tc). The chi60 and chi70 chitinase genes are located on the gene cluster encoding Tc toxins. To clarify the insecticidal activity of chitinases and their relationship with...

  • Article
  • Open Access
3 Citations
1,870 Views
11 Pages

Nematode–microbe symbiosis plays a key role in determining pathogenesis against pests. The modulation of symbiotic bacteria may affect the virulence of entomopathogenic nematodes (EPNs) and the biological management of pests. We tested the infl...

  • Article
  • Open Access
5 Citations
2,574 Views
14 Pages

Antifungal Activity and Mechanism of Xenocoumacin 1, a Natural Product from Xenorhabdus nematophila against Sclerotinia sclerotiorum

  • Shujing Zhang,
  • Yunfei Han,
  • Lanying Wang,
  • Jinhua Han,
  • Zhiqiang Yan,
  • Yong Wang and
  • Yonghong Wang

26 February 2024

Sclerotinia sclerotiorum (Lib.) de Bary, a polyphagous necrotrophic fungal pathogen, has brought about significant losses in agriculture and floriculture. Until now, the most common method for controlling S. sclerotiorum has been the application of f...

  • Article
  • Open Access
10 Citations
3,871 Views
17 Pages

13 July 2021

Drosophila suzukii, Spotted Wing Drosophila (SWD), is a serious economic issue for thin-skinned fruit farmers. The invasion of this dipteran is mainly counteracted by chemical control methods; however, it would be desirable to replace them with biolo...

  • Article
  • Open Access
2 Citations
1,351 Views
14 Pages

12 February 2025

Heat shock proteins (HSPs), particularly HSP90, play a vital role in insect responses to environmental and biotic stresses by maintaining protein stability and supporting immune defenses. This study explores HSP90 regulation in Galleria mellonella la...

  • Article
  • Open Access
10 Citations
3,678 Views
13 Pages

Improving the Yield of Xenocoumacin 1 by PBAD Promoter Replacement in Xenorhabdus nematophila CB6

  • Youcai Qin,
  • Fenglian Jia,
  • Xiaohui Li,
  • Beibei Li,
  • Jie Ren,
  • Xiufen Yang and
  • Guangyue Li

10 December 2021

Xenocoumacin 1 (Xcn1), which is produced by Xenorhabdus nematophila CB6, exhibits strong inhibition activity against plant pathogens, especially fungi and oomycetes. Therefore, it has attracted interest in developing it into a novel biofungicide appl...

  • Article
  • Open Access
5 Citations
3,936 Views
14 Pages

17 October 2019

Xenorhabdus nematophila and Photorhabdus luminescens are entomopathogenic bacterial symbionts that produce toxic proteins that can interfere with the immune system of insects. Herein, we show that outer membrane proteins (OMPs) could be involved as b...

  • Article
  • Open Access
10 Citations
3,872 Views
13 Pages

The cabbage butterfly, Pieris brassicae Linnaeus (Lepidoptera: Pieridae), is an oligophagous and invasive insect pest of various economically important cole crops. Recently, there have been reports about an increase in the incidence and damaging acti...

  • Article
  • Open Access
1,233 Views
15 Pages

Capillary Electrophoresis Electrospray Ionization Mass Spectrometry Reveals Metabolic Perturbations During Nematode Infection in Drosophila melanogaster

  • Yayra T. Tuani,
  • Navid J. Ayon,
  • Rosemary M. Onjiko,
  • Sam B. Choi,
  • Shruti Yadav,
  • Ioannis Eleftherianos and
  • Peter Nemes

Drosophila melanogaster is broadly used to model host–pathogen interactions. Entomopathogenic nematodes are excellent research tools for dissecting the molecular and functional basis of parasitism and the host’s anti-parasitic response. I...

  • Review
  • Open Access
54 Citations
7,330 Views
30 Pages

11 September 2018

Entomopathogenic nematodes (EPNs) are widely used as biological control agents against insect pests, the efficacy of these organisms strongly depends on the balance between the parasitic strategies and the immune response of the host. This review sum...

  • Article
  • Open Access
8 Citations
3,024 Views
15 Pages

Symbiotic bacteria form a mutualistic relationship with nematodes and are pathogenic to many insect pests. They kill insects using various strategies to evade or suppress their humoral and cellular immunity. Here we evaluate the toxic effects of thes...

  • Short Note
  • Open Access
13 Citations
5,362 Views
11 Pages

8 February 2018

Drosophila melanogaster is an excellent model to dissect the molecular components and pathways of the innate anti-pathogen immune response. The nematode parasite Steinernema carpocapsae and its mutualistic bacterium Xenorhabdus nematophila form a com...

  • Article
  • Open Access
6 Citations
2,985 Views
14 Pages

Comparative Genomics and Pathogenicity Analysis of Two Bacterial Symbionts of Entomopathogenic Nematodes: The Role of the GroEL Protein in Virulence

  • Abraham Rivera-Ramírez,
  • Rosalba Salgado-Morales,
  • Alfredo Jiménez-Pérez,
  • Rebeca Pérez-Martínez,
  • Blanca Inés García-Gómez and
  • Edgar Dantán-González

Bacteria of the genera Xenorhabdus and Photorhabdus are symbionts of entomopathogenic nematodes. Despite their close phylogenetic relationship, they show differences in their pathogenicity and virulence mechanisms in target insects. These differences...

  • Article
  • Open Access
1,085 Views
20 Pages

Xenorhabdus and Photorhabdus Metabolites for Fungal Biocontrol and Application in Soybean Seed Protection

  • Nathalie Otoya-Martinez,
  • Mustapha Touray,
  • Harun Cimen,
  • Edna Bode,
  • Helge B. Bode,
  • Selcuk Hazir,
  • Julie Giovanna Chacon-Orozco,
  • César Júnior Bueno and
  • Luís Gárrigos Leite

23 September 2025

Photorhabdus and Xenorhabdus bacteria, members of the Morganellaceae family, are sources of novel natural products for the biocontrol of fungal pathogens in soybean production. This study demonstrated the inhibitory effects of metabolites from four P...

  • Article
  • Open Access
4 Citations
2,780 Views
20 Pages

Diverse Roles for a Conserved DNA-Methyltransferase in the Entomopathogenic Bacterium Xenorhabdus

  • Nadège Ginibre,
  • Ludovic Legrand,
  • Victoria Bientz,
  • Jean-Claude Ogier,
  • Anne Lanois,
  • Sylvie Pages and
  • Julien Brillard

9 October 2022

In bacteria, DNA-methyltransferase are responsible for DNA methylation of specific motifs in the genome. This methylation usually occurs at a very high rate. In the present study, we studied the MTases encoding genes found in the entomopathogenic bac...

  • Article
  • Open Access
2 Citations
2,192 Views
18 Pages

17 September 2024

Entomopathogenic bacteria, classified into the genus Xenorhabdus, exhibit a dual lifestyle as mutualistic symbionts to Steinernema nematodes and as pathogens to a broad range of insects. Bacterial virulence depends on toxin proteins that induce toxem...

  • Article
  • Open Access
46 Citations
11,733 Views
17 Pages

Activating and Attenuating the Amicoumacin Antibiotics

  • Hyun Bong Park,
  • Corey E. Perez,
  • Elena Kim Perry and
  • Jason M. Crawford

The amicoumacins belong to a class of dihydroisocoumarin natural products and display antibacterial, antifungal, anticancer, and anti-inflammatory activities. Amicoumacins are the pro-drug activation products of a bacterial nonribosomal peptide-polyk...

  • Article
  • Open Access
14 Citations
2,639 Views
9 Pages

28 August 2023

Vector-borne diseases pose a severe threat to human and animal health. Culex pipiens L. (Diptera: Culicidae) is a widespread mosquito species and serves as a vector for the transmission of infectious diseases such as West Nile disease and Lymphatic F...

  • Article
  • Open Access
33 Citations
5,545 Views
14 Pages

17 November 2021

The European grapevine moth (EGVM) Lobesia botrana (Lepidoptera: Tortricidae) is a relevant pest in the Palearctic region vineyards and is present in the Americas. Their management using biological control agents and environmentally friendly biotechn...

  • Article
  • Open Access
29 Citations
4,672 Views
12 Pages

Insecticidal Effect of Entomopathogenic Nematodes and the Cell-Free Supernatant from Their Symbiotic Bacteria against Philaenus spumarius (Hemiptera: Aphrophoridae) Nymphs

  • Ignacio Vicente-Díez,
  • Rubén Blanco-Pérez,
  • María del Mar González-Trujillo,
  • Alicia Pou and
  • Raquel Campos-Herrera

14 May 2021

The meadow spittlebug Philaenus spumarius (Hemiptera: Aphrophoridae) is the primary vector of Xylella fastidiosa (Proteobacteria: Xanthomonadaceae) in Europe, a pest–disease complex of economically relevant crops such as olives, almonds, and grapevin...

  • Article
  • Open Access
6 Citations
3,320 Views
18 Pages

Functional Comparison of Three Chitinases from Symbiotic Bacteria of Entomopathogenic Nematodes

  • Da-Jeong Son,
  • Geun-Gon Kim,
  • Ho-Yul Choo,
  • Nam-Jun Chung and
  • Young-Moo Choo

3 January 2024

Xenorhabdus and Photorhabdus, bacterial symbionts of entomopathogenic nematodes Steinernema and Heterorhabditis, respectively, have several biological activities including insecticidal and antimicrobial activities. Thus, XnChi, XhChi, and PtChi, chit...

  • Article
  • Open Access
7 Citations
3,812 Views
27 Pages

Molecular Identification and Phylogenetic Diversity of Native Entomopathogenic Nematodes, and Their Bacterial Endosymbionts, Isolated from Banana and Plantain Crops in Western Colombia

  • Jorge Mario Londoño-Caicedo,
  • Miguel Uribe-Londoño,
  • María Angélica Buitrago-Bitar,
  • Andrés J. Cortés and
  • Jaime Eduardo Muñoz-Flórez

14 May 2023

With the increasing negative impacts on worldwide food production caused by pests, the recovery of native entomopathogenic nematodes (EPNs) is relevant, since they are adapted to local environments, entomofauna, and significant virulence. Therefore,...