Evidence map›Paper›PMID 25189365›Full record

ArticleThe Journal of experimental biology2014

Dual silencing of long and short Amblyomma americanum acidic chitinase forms weakens the tick cement cone stability.

Tae K Kim, Janet Curran, Albert Mulenga

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of experimental biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.7field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 31 citations in OpenAlex.

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  13. Tick attachment cement - reviewing the mysteries of a biological skin plug system.Biological reviews of the Cambridge Philosophical Society · 2018
    Review
  14. Article
  15. Article
  16. Article
  17. Tick-Host Range Adaptation: Changes in Protein Profiles in Unfed AdultFrontiers in cellular and infection microbiology · 2017
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Tae K KimTexas A&M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA.
Janet CurranTexas A&M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA.
Albert MulengaTexas A&M University AgriLife Research, Department of Entomology, 2475 TAMU, College Station, TX 77843, USA a-mulenga@tamu.edu.
Mitchell Institute · US

Funding

Tick feeding regulation by orthologous tick saliva serine protease inhibitorsR01AI093858 · NIAID · TEXAS A&M UNIVERSITY · PI MULENGA, ALBERT · 2011 to 2014
$1.0M
Molecular Mechanisms Regulating Early Stage Tick FeedingR21AI081093 · NIAID · TEXAS A&M UNIVERSITY · PI MULENGA, ALBERT · 2011 to 2012
$404k
NIAID NIH HHS AI081093NIAID NIH HHS AI1AI093858NIAID NIH HHS R01 AI093858NIAID NIH HHS R21 AI081093
6 · The paper itself

Abstract

This study demonstrates that Amblyomma americanum (Aam) constitutively and ubiquitously expresses the long (L) and short (S) putative acidic chitinases (Ach) that are distinguished by a 210 base pair (bp) deletion in AamAch-S. Full-length AamAch-L and AamAch-S cDNA are 1959 and 1718 bp long, containing 1332 and 1104 bp open reading frames that code for 443 and 367 amino acid residues proteins with the former predicted to be extracellular and the latter intracellular. Both AamAch-L and AamAch-S mRNA are expressed in multiple organs as revealed by qualitative RT-PCR analysis. Furthermore, quantitative reverse transcription polymerase chain reaction analysis revealed that AamAch-L mRNA was downregulated in the mid-gut, but was unchanged in the salivary gland and in other organs in response to feeding. Of significant interest, AamAch-L and/or AamAch-S functions are probably associated with formation and/or maintenance of stability of A. americanum tick cement cone. Dual RNA interference silencing of AamAch-L and/or AamAch-S mRNA caused ticks to loosely attach onto host skin as suggested by bleeding around tick mouthparts and ticks detaching off host skin with a light touch. AamAch-L may apparently encode an inactive chitinase as indicated by Pichia pastoris-expressed recombinant AamAch-L failing to hydrolyse chitinase substrates. Unpublished related work in our laboratory, and published work by others that found AamAch-L in tick saliva, suggest that native AamAch-L is a non-specific immunoglobulin binding tick saliva protein in that rAamAch-L non-specifically bound rabbit, bovine and chicken non-immune sera. We discuss findings in this study with reference to advancing knowledge on tick feeding physiology.

Indexed as

Gene SilencingAmino Acid SequenceAnimalsCattleChickensChitinasesDNA, ComplementaryFeeding BehaviorGene Expression RegulationIxodidaeMolecular Sequence DataPhylogenyRabbitsReverse Transcriptase Polymerase Chain ReactionRNA InterferenceRNA, MessengerChitinasesDNA, ComplementaryRNA, MessengerAmblyomma americanumGlycoside hydrolase 18 familyPutative acidic chitinaseTick cementTick feeding physiology

Identifiers

PMID25189365
PMCPMC4182284
OpenAlexW2108637105

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.