Abstract
Insects use their innate immunity to defend themselves against foreign invaders, such as microorganisms, nematodes and parasites. . Cotesia plutellae, an endoparasitoid wasp that parasitizes the diamondback moth . Plutella xylostella, uses several strategies to attack the host immune system, such as injection of viruses, venom, and serosal membrane-derived cells denoted teratocytes. However, the proteome profiles related to these immune deficiency systems have yet to be clearly defined. In this study, we investigate differences in protein expression patterns in parasitized . P. xylostella larvae, with a view to identifying parasitism-specific factors. Using 2D polyacrylamide gel electrophoresis, proteins in the host plasma were assessed every 48. h after parasitism by . C. plutellae. A large number of protein spots (350 in total) were detected, and approximately 50 spots were differentially expressed in the parasitized . P. xylostella larvae every 48. h. In total, 26 potential candidates, including . P. xylostella Serpin 2 (pxSerpin 2), translationally controlled tumor protein, signal transduction histidine kinase, apolipophorin-III, and fatty-acid binding protein were identified through quadrupole time-of-flight tandem mass spectrometry and sequence homology analysis. These proteins were classified into the following functional groups: immunity, signaling, lipid metabolism, energy metabolism, amino acid/nucleotide metabolism, and others. The pxSerpin 2 gene was cloned, and its expression profile investigated during the course of parasitism. Real-time PCR analysis of pxSerpin 2 revealed a poor correlation between the mRNA level and protein abundance. Our results clearly suggest that parasitism-specific proteins participate in suppression of the host immune response.
| Original language | English |
|---|---|
| Pages (from-to) | 1271-1280 |
| Number of pages | 10 |
| Journal | Journal of Insect Physiology |
| Volume | 54 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2008 Aug 1 |
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Keywords
- Cotesia plutellae
- Parasitism-specific proteins
- Plutella xylostella
- Proteomics
- PxSerpin 2
ASJC Scopus subject areas
- Insect Science
- Physiology
Cite this
Proteomic analysis of parasitized Plutella xylostella larvae plasma. / Song, Kyung Han; Jung, Min Kyo; Eum, Jai Hoon; Hwang, In Cheon; Han, Sung Sik.
In: Journal of Insect Physiology, Vol. 54, No. 8, 01.08.2008, p. 1271-1280.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Proteomic analysis of parasitized Plutella xylostella larvae plasma
AU - Song, Kyung Han
AU - Jung, Min Kyo
AU - Eum, Jai Hoon
AU - Hwang, In Cheon
AU - Han, Sung Sik
PY - 2008/8/1
Y1 - 2008/8/1
N2 - Insects use their innate immunity to defend themselves against foreign invaders, such as microorganisms, nematodes and parasites. . Cotesia plutellae, an endoparasitoid wasp that parasitizes the diamondback moth . Plutella xylostella, uses several strategies to attack the host immune system, such as injection of viruses, venom, and serosal membrane-derived cells denoted teratocytes. However, the proteome profiles related to these immune deficiency systems have yet to be clearly defined. In this study, we investigate differences in protein expression patterns in parasitized . P. xylostella larvae, with a view to identifying parasitism-specific factors. Using 2D polyacrylamide gel electrophoresis, proteins in the host plasma were assessed every 48. h after parasitism by . C. plutellae. A large number of protein spots (350 in total) were detected, and approximately 50 spots were differentially expressed in the parasitized . P. xylostella larvae every 48. h. In total, 26 potential candidates, including . P. xylostella Serpin 2 (pxSerpin 2), translationally controlled tumor protein, signal transduction histidine kinase, apolipophorin-III, and fatty-acid binding protein were identified through quadrupole time-of-flight tandem mass spectrometry and sequence homology analysis. These proteins were classified into the following functional groups: immunity, signaling, lipid metabolism, energy metabolism, amino acid/nucleotide metabolism, and others. The pxSerpin 2 gene was cloned, and its expression profile investigated during the course of parasitism. Real-time PCR analysis of pxSerpin 2 revealed a poor correlation between the mRNA level and protein abundance. Our results clearly suggest that parasitism-specific proteins participate in suppression of the host immune response.
AB - Insects use their innate immunity to defend themselves against foreign invaders, such as microorganisms, nematodes and parasites. . Cotesia plutellae, an endoparasitoid wasp that parasitizes the diamondback moth . Plutella xylostella, uses several strategies to attack the host immune system, such as injection of viruses, venom, and serosal membrane-derived cells denoted teratocytes. However, the proteome profiles related to these immune deficiency systems have yet to be clearly defined. In this study, we investigate differences in protein expression patterns in parasitized . P. xylostella larvae, with a view to identifying parasitism-specific factors. Using 2D polyacrylamide gel electrophoresis, proteins in the host plasma were assessed every 48. h after parasitism by . C. plutellae. A large number of protein spots (350 in total) were detected, and approximately 50 spots were differentially expressed in the parasitized . P. xylostella larvae every 48. h. In total, 26 potential candidates, including . P. xylostella Serpin 2 (pxSerpin 2), translationally controlled tumor protein, signal transduction histidine kinase, apolipophorin-III, and fatty-acid binding protein were identified through quadrupole time-of-flight tandem mass spectrometry and sequence homology analysis. These proteins were classified into the following functional groups: immunity, signaling, lipid metabolism, energy metabolism, amino acid/nucleotide metabolism, and others. The pxSerpin 2 gene was cloned, and its expression profile investigated during the course of parasitism. Real-time PCR analysis of pxSerpin 2 revealed a poor correlation between the mRNA level and protein abundance. Our results clearly suggest that parasitism-specific proteins participate in suppression of the host immune response.
KW - Cotesia plutellae
KW - Parasitism-specific proteins
KW - Plutella xylostella
KW - Proteomics
KW - PxSerpin 2
UR - http://www.scopus.com/inward/record.url?scp=77950296913&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77950296913&partnerID=8YFLogxK
U2 - 10.1016/j.jinsphys.2008.06.010
DO - 10.1016/j.jinsphys.2008.06.010
M3 - Article
C2 - 18671979
AN - SCOPUS:77950296913
VL - 54
SP - 1271
EP - 1280
JO - Journal of Insect Physiology
JF - Journal of Insect Physiology
SN - 0022-1910
IS - 8
ER -