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Metagenomic 16S rRNA gene sequencing survey of Borrelia species in Irish samples of Ixodes ricinus ticks
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      Is Open Access

      Knockdown of TRPV gene Nanchung decreases resistance to the novel pyropene insecticide, afidopyropen, in Bemisia tabaci

      Author(s): , , , ,
      Publication date Created:
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      Journal: International Journal of Biological Macromolecules
      Publisher: Elsevier BV

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          Abstract

          <p class="first" id="d1471203e93">Insect TRPV is one subfamily of transient receptor potential (TRP) channels, and it is composed of Inactive (Iav) and Nanchung (Nan), the molecular targets of afidopyropen in several sucking insect pests. In this study, we performed successive selection and synergism tests based on previous work. The resistant afidopyropen strain HD-Afi of Bemisia tabaci reached about 86-fold resistance to afidopyropen, and only part of the resistance resulted from detoxification of cytochrome P450 monooxygenases. Then, we cloned and characterized Nan and Iav from B. tabaci (BtNan and BtIav), and found that they were expressed in all stages of development and tissues of adult, and the expression level of BtNan in strains of HD-S and HD-Afi were significantly increased after afidopyropen treatment. Further, expression of BtNan was downregulated after gene silencing, and it resulted in significantly decreased afidopyropen resistance in the strain of HD-Afi. Our data revealed the first evidence that overexpression of the TRPV Nan gene is responsible for causing afidopyropen resistance in B. tabaci, and our results could provide new visions on the function of TRPVs in the development of resistance to pesticide and supply evidence for developing novel strategies of pest management. </p>

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          Analysis of relative gene expression data using real-time quantitative PCR and the 2(-Delta Delta C(T)) Method.

          Kenneth Livak, Thomas D. Schmittgen (2001)
          The two most commonly used methods to analyze data from real-time, quantitative PCR experiments are absolute quantification and relative quantification. Absolute quantification determines the input copy number, usually by relating the PCR signal to a standard curve. Relative quantification relates the PCR signal of the target transcript in a treatment group to that of another sample such as an untreated control. The 2(-Delta Delta C(T)) method is a convenient way to analyze the relative changes in gene expression from real-time quantitative PCR experiments. The purpose of this report is to present the derivation, assumptions, and applications of the 2(-Delta Delta C(T)) method. In addition, we present the derivation and applications of two variations of the 2(-Delta Delta C(T)) method that may be useful in the analysis of real-time, quantitative PCR data. Copyright 2001 Elsevier Science (USA).
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            TRP channels.

            Kartik Venkatachalam, Craig Montell (2007)
            The TRP (Transient Receptor Potential) superfamily of cation channels is remarkable in that it displays greater diversity in activation mechanisms and selectivities than any other group of ion channels. The domain organizations of some TRP proteins are also unusual, as they consist of linked channel and enzyme domains. A unifying theme in this group is that TRP proteins play critical roles in sensory physiology, which include contributions to vision, taste, olfaction, hearing, touch, and thermo- and osmosensation. In addition, TRP channels enable individual cells to sense changes in their local environment. Many TRP channels are activated by a variety of different stimuli and function as signal integrators. The TRP superfamily is divided into seven subfamilies: the five group 1 TRPs (TRPC, TRPV, TRPM, TRPN, and TRPA) and two group 2 subfamilies (TRPP and TRPML). TRP channels are important for human health as mutations in at least four TRP channels underlie disease.
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              An introduction to TRP channels.

              I. Ramsey, Markus Delling, David Clapham (2006)
              The aim of this review is to provide a basic framework for understanding the function of mammalian transient receptor potential (TRP) channels, particularly as they have been elucidated in heterologous expression systems. Mammalian TRP channel proteins form six-transmembrane (6-TM) cation-permeable channels that may be grouped into six subfamilies on the basis of amino acid sequence homology (TRPC, TRPV, TRPM, TRPA, TRPP, and TRPML). Selected functional properties of TRP channels from each subfamily are summarized in this review. Although a single defining characteristic of TRP channel function has not yet emerged, TRP channels may be generally described as calcium-permeable cation channels with polymodal activation properties. By integrating multiple concomitant stimuli and coupling their activity to downstream cellular signal amplification via calcium permeation and membrane depolarization, TRP channels appear well adapted to function in cellular sensation. Our review of recent literature implicating TRP channels in neuronal growth cone steering suggests that TRPs may function more widely in cellular guidance and chemotaxis. The TRP channel gene family and its nomenclature, the encoded proteins and alternatively spliced variants, and the rapidly expanding pharmacology of TRP channels are summarized in online supplemental material.
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                Author and article information

                Journal
                Title: International Journal of Biological Macromolecules
                Abbreviated Title: International Journal of Biological Macromolecules
                Publisher: Elsevier BV
                ISSN (Print): 01418130
                Publication date Created: January 2023
                Publication date (Print): January 2023
                Volume: 224
                Pages: 1566-1575
                Article
                DOI: 10.1016/j.ijbiomac.2022.10.242
                PubMed ID: 36330856
                SO-VID: ad20680b-e92a-48be-8c6b-5081dd8db755
                Copyright © © 2023
                License:

                https://www.elsevier.com/tdm/userlicense/1.0/

                http://creativecommons.org/licenses/by/4.0/

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