Publications by authors named "Guang Cheng Xie"

Article Synopsis
  • Rodents are key hosts for various vector-borne bacteria and protozoan parasites, yet their role in transmitting these infections is not well understood, despite potential human health impacts such as fever.
  • In a study conducted in Guangxi Province from May to October 2019, scientists captured 192 wild rodents and analyzed their spleen samples for infections using advanced DNA detection techniques.
  • The results identified multiple pathogens, including several zoonotic species, with the most common co-infection being between "Candidatus Neoehrlichia mikurensis" and other microorganisms, highlighting the diverse infection profiles in these rodent populations.
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Article Synopsis
  • Rodents, particularly Daurian ground squirrels in China, are vital hosts for various zoonotic pathogens, but surveillance on these pathogens is sparse, hindering our understanding of their ecology and risks to humans.* -
  • In a study, DNA analysis of 165 spleen samples revealed eight bacterial pathogens, highlighting the genetic diversity of these microbes and the occurrence of co-infection.* -
  • Six of the identified pathogens pose a potential risk to human health, especially for local herders in close contact with these squirrels and their parasites.*
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Background: Dogs and cats are the hosts of many vector-borne human pathogens that can be transmitted to humans. Given their direct and intimate contact with humans, companion dogs and cats are considered direct sentinels of vector-borne human pathogens. However, limited information is currently available regarding canine and feline zoonotic pathogens in China.

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Host immune activation is critical for enterovirus 71 (EV71) clearance and immunopathogenesis. However, the mechanism of innate immune activation, especially of cell membrane-bound toll-like receptors (TLRs), against EV71 remains unknown. We previously demonstrated that TLR2 and its heterodimer inhibit EV71 replication.

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Rodents are the primary natural reservoirs of spp., and some of which are zoonotic causative agents. Hence, surveillance of sp.

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"Candidatus Rickettsia tarasevichiae" (CRT) is increasingly being recognized as a disease causative agent in China and poses a great challenge to public health. Rapid and accurate detection is indispensable for laboratory diagnosis of infection caused by CRT and its surveillance in ticks. In the present study, a novel DNA-based loop-mediated isothermal amplification (LAMP) assay targeting the ompA gene was developed for the detection of CRT in tick samples.

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Community acquired-pneumonia (CAP) has varying causative pathogens and clinical characteristics. This study investigated the prevalence of Mycoplasma pneumoniae (M pneumoniae) and evaluated the clinical characteristics in infected hospitalized children by disease severity.From throat swabs of hospitalized children (5 months to 14 years) with CAP collected between November 2017 and May 2018, M pneumoniae and other CAP pathogens were identified using polymerase chain reaction (PCR).

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In recent years, hemorrhagic fever with renal syndrome (HFRS) incidence has been becoming a severe public health problem again due to its significant increase in Shaanxi Province, China. Baoji, located in the Guanzhong Plain in the central part of Shaanxi Province, has been severely affected by HFRS since its first emergence in 1955. To better understand the epidemiology of orthohantaviruses infection in humans and the causative agents carried by the rodents, the long-term incidence patterns were analyzed and a molecular epidemiological investigation of orthohantaviruses infection in humans and rodents was performed.

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The alteration of host cell splicing is a major strategy favouring viral replication; however, the interaction between human tonsillar epithelial cells (HTECs) and enterovirus 71 (EV71) has not been fully elucidated. Here, a total of 201 differentially expressed genes (DEGs) and 3266 novel genes with coding potential were identified. A total of 3479 skipped exons (SEs), 515 alternative 3' splice sites (A3SSs), 391 alternative 5' splice sites (A5SSs), 531 mutually exclusive exons (MXEs) and 825 retained introns (RIs) were identified as significantly altered alternative splicing (AS) events.

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Anaplasma bovis is an organism significant to cattle and buffalo since it is one of the causative agents of bovine anaplasmosis. Previous studies have shown the worldwide distribution of A. bovis.

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Background: Several members of genus Babesia are important pathogens causing babesiosis in dogs. In China, at least five Babesia species have been described in dogs or ticks. This study sought to determine the prevalence and molecular characteristics of various Babesia spp.

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Hepatozoon canis, transmitted by Rhipicephalus sanguineus, is a tick-borne pathogen and causes canine hepatozoonosis. Until now, only limited previous studies were conducted on the molecular detection and characterization of Hepatozoon sp. in dogs in China.

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Objectives: To better understand the spectrums of pathogens causing herpangina and circulation of Coxsackievirus A4 in Yancheng, China.

Methods: Stool samples from herpangina and HFMD cases were collected. Real Time PCR Kits was used to identify Enterovirus 71, CV-A16 and CV-A6, and nested reverse transcription PCR (nRT-PCR) to detect the other enterovirus types.

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Objective: Newly identified human rhinovirus C (HRV-C) and human bocavirus (HBoV) cannot propagate in vitro in traditional cell culture models; thus obtaining knowledge about these viruses and developing related vaccines are difficult. Therefore, it is necessary to develop a novel platform for the propagation of these types of viruses.

Methods: A platform for culturing human airway epithelia in a three-dimensional (3D) pattern using Matrigel as scaffold was developed.

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To establish an animal model for the newly identified Marmota Himalayana hepatovirus, MHHAV, so as to develop a better understanding of the infection of hepatitis A viruses. Five experimental woodchucks (Marmota monax) were inoculated intravenously with the purified MHHAV from wild woodchuck feces. One animal injected with PBS was defined as a control.

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Rhinovirus C (RV-C), a newly identified group of human rhinoviruses (RVs), is associated with exacerbation of severe asthma. The type I interferon (IFN) response induced by this virus and the mechanisms of evasion of IFN-mediated innate immunity for RV-C remain unclear. In this study, we constructed a full-length cDNA clone of RV-C (LZ651) from a clinical sample.

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Norovirus (NoV) is a pathogen that commonly causes viral diarrhea in children. Studies indicate that NoV recognizes human histo-blood group antigens (HBGAs) as cell attachment factors. In order to explore the correlation between of NoV infection and HBGAs, a cross-sectional study was conducted in children less than five years old who were hospitalized with diarrhea in two areas of China between November 2014 and February 2015.

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A recent histopathologic study implicated human tonsillar crypt epithelium as an important site for EV71 replication in EV71-caused fatal cases. This study aimed to confirm the susceptibility of human tonsillar epithelium to EV71. Two human tonsillar epithelial cell lines (UT-SCC-60A and UT-SCC-60B) were susceptive to EV71, and PI3K/AKT, p38, ERK1/2, and JNK1/2 signal pathways were activated.

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The aim of this study was to investigate the knockdown efficiency of 2'-O-methylated (2'-OMe)-modified small interfering RNAs (siRNAs) on human rhinovirus 1B (HRV1B) replication and the interferon response. Thus, 24 2'-OMe-modified siRNAs were designed to target HRV1B. The RNA levels of HRV1B, Toll-like receptor 3, melanoma differentiation-associated gene 5, retinoic acid inducible gene-I, and interferons were determined in HRV1B-infected HeLa and BEAS-2B epithelial cells transfected with 2'-OMe-modified siRNAs.

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Hepatitis A virus (HAV) is a hepatotropic picornavirus that causes acute liver disease worldwide. Here, we report on the identification of a novel hepatovirus tentatively named Marmota Himalayana hepatovirus (MHHAV) in wild woodchucks (Marmota Himalayana) in China. The genomic and molecular characterization of MHHAV indicated that it is most closely related genetically to HAV.

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Respiratory damage is a main manifestation of severe Enterovirus 71 (EV71) infection. Polymorphisms of -403G/A (rs2107538), -28C/G (rs2280788), and In1.1T/C (rs2280789) in chemotactic chemokine ligand 5 (CCL5) have linked with many respiratory diseases.

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Article Synopsis
  • A study conducted in Nanjing in 2013 aimed to identify the major viruses responsible for hand, foot and mouth disease (HFMD) in hospitalized children and examine their clinical and genetic features.
  • The research found that 68.5% of throat swabs tested positive for enteroviruses, with coxsackievirus A6 (CVA6) being the most prevalent strain, followed by enterovirus 71 (EV71) and others.
  • Patients infected with CVA6 exhibited atypical symptoms compared to those with EV71, and the study highlighted the presence of genetically distinct strains of CVA6 circulating in the region.
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The picornavirus family comprises many small viruses, several of which are important pathogens of humans and livestock. The 3C protease (3Cpro) of different species and genera of picornavirus contains the classic G-X-C-G motif and Cys-His-Asp/Glu catalytic triad. 3Cpro conducts maturation cleavage in the regions of VP2-VP3 and VP3-VP1 in P1, 2A-2B and 2B-2C in P2 and the whole P3.

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  • Researchers used PCR to amplify and sequence the genome of human bocavirus 2 (HBoV2) from fecal samples collected in 2010, resulting in a 5444 bp genome (HBoV2-NC).
  • Phylogenetic analysis indicated that HBoV2-NC is most closely related to the HBoV2 Lanzhou strain.
  • The study also predicted that HBoV2-NC contains inverted terminal repeats with a typical stem-loop structure, which is characteristic of other parvoviruses, and some additional flanking sequences were identified through linker-PCR.
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