Publications by authors named "Chu-yan Li"

Background: Yezo virus (YEZV) is an emerging tick-borne pathogen, which was initially reported in Japan in 2021. Only one patient had been reported in China so far. We aimed to describe the epidemiological, clinical, and laboratory findings of a series of patients, and to characterise the viral genomes of YEZV.

View Article and Find Full Text PDF

Introduction: Ticks are the most important obligate blood-feeding vectors of human pathogens. With the advance of high-throughput sequencing, more and more bacterial community and virome in tick has been reported, which seems to pose a great threat to people.

Methods: A total of 14 skin specimens collected from tick-bite patients with mild to severe symptoms were analyzed through meta-transcriptomic sequencings.

View Article and Find Full Text PDF

The long-lasting co-evolution of ticks with pathogens results in mutual adaptation. Blood-feeding is one of the critical physiological behaviors that have been associated with the tick microbiome; however, most knowledge was gained through the study of laboratory-reared ticks. Here we detached ticks at different stages of blood-feeding from human patients and performed high-throughput transcriptomic analysis on them to identify their virome and genes differentially expressed between flat and fully fed ticks.

View Article and Find Full Text PDF

Magnesium (Mg), an essential structural component of chlorophyll, is absorbed from the soil by roots and transported to shoots to support photosynthesis in plants. However, the molecular mechanisms underlying root-to-shoot Mg translocation remain largely unknown. We describe here the identification of four plasma membrane (PM)-localized transporters, named Mg release transporters (MGRs), that are critical for root-to-shoot Mg transport in Arabidopsis.

View Article and Find Full Text PDF

Spotted fever group rickettsia (SFGR) can cause mild to fatal illness. The early interaction between the host and rickettsia in skin is largely unknown, and the pathogenesis of severe rickettsiosis remains an important topic. A surveillance of SFGR infection by PCR of blood and skin biopsy specimens followed by sequencing and immunohistochemical (IHC) detection was performed on patients with a recent tick bite between 2013 and 2016.

View Article and Find Full Text PDF
Article Synopsis
  • Jingmen tick virus (JMTV) has been linked to tick bites and severe cases in humans, including connections to a deadly disease called Crimean-Congo haemorrhagic fever.
  • Researchers discovered JMTV strains in patients and infected ticks, demonstrating the virus can replicate in human skin tissue and accumulate in tick salivary glands.
  • The study indicates JMTV poses significant public health risks due to its potential to cause severe illness and its efficient transmission by ticks, warranting further research and attention.
View Article and Find Full Text PDF
Article Synopsis
  • Human babesiosis is a rising health concern in China, with a study focusing on identifying Babesia infections in ticks, sheep, and humans in the northeastern region using PCR and genetic sequencing.
  • Researchers found a Babesia crassa-like agent in specific tick species and confirmed 31 cases of infection in humans, where common symptoms included headache, nausea, and fever, primarily in previously healthy individuals.
  • The findings point to the potential for severe outcomes in immunocompromised patients and the risk of blood supply transmission, highlighting the need for more research on these infections.
View Article and Find Full Text PDF

We conducted an investigation of Borrelia miyamotoi infections in humans and ticks in northeastern China. Of 984 patients reporting recent tick bites, 14 (1.4%) were found to be infected with B.

View Article and Find Full Text PDF
Article Synopsis
  • - The study investigated a newly discovered Anaplasma species, provisionally named "Anaplasma capra," that infects goats in China and assessed its potential to cause human infections in patients with recent tick bites.
  • - Out of 477 patients tested, 28 were found to be infected, and many displayed symptoms such as fever, headache, and malaise, with some requiring hospital admission for severe cases.
  • - The emergence of this novel pathogen indicates that people in northern China should take precautionary measures against tick bites to reduce the risk of exposure and potential illness.
View Article and Find Full Text PDF
Article Synopsis
  • Human babesiosis, specifically caused by "Babesia venatorum," is a newly recognized disease, with 48 cases identified in individuals following tick bites in a hospital in China.
  • Diagnosis was made through various methods including PCR and microscopic identification, and most patients were middle-aged, with symptoms like fever, headache, and myalgia.
  • The study suggests that "B venatorum" should be considered in diagnosing tick-borne illnesses, as the infection leads to notable changes in certain biomarkers and symptoms similar to other tick-borne diseases.
View Article and Find Full Text PDF
Article Synopsis
  • Researchers identified Rickettsia raoultii infections in two individuals in China who had localized rashes from tick bites.
  • The presence of R. raoultii DNA was detected in 4% of Dermacentor silvarum ticks collected from the area.
  • Additionally, the DNA was found in one tick that was removed from one of the infected patients.
View Article and Find Full Text PDF

Background: Our previous studies have demonstrated the cystic fibrosis transmembrane conductance regulator (CFTR) is important for capacitation and male fertility in mouse and guinea pig spermatozoa. However, the exact function of CFTR on human sperm fertilizing capacity, and correlation with sperm quality has not been established. The present study may shed light on some unexplained male infertility, and on a possible new method for diagnosis of male infertility and strategy for male contraception.

View Article and Find Full Text PDF

Objective: To study the expression of protein kinase C (PKC) alpha subtype in Chinese hamster ovary (CHO) cells.

Methods: The PKC alpha primer pairs were designed based on the GenBank sequence of PKC alpha of a species with the highest homology to Chinese hamster identified using EMBL Data Library Clustalw tool. The sequence coding for PKC alpha, amplified from the CHO cells using RT-PCR, was ligated to the pGEM-T plasmid vector, and the recombinant vector was transformed into E.

View Article and Find Full Text PDF