Abstract:
:Iron functions as a nutrient and a potential toxin in all organisms. It plays a key role in the interaction between microbes and their hosts as well. Microbial infection disrupts iron homeostasis in the host; meanwhile the host endeavors to keep the homeostasis through iron transport and storage. Transferrins and ferritins are the major iron-binding proteins that affect iron distribution in insects. In this study, we investigated a possible involvement of Bombyx mori ferritin 1 (BmFer1) heavy chain homolog in the defense against bacterial infection in the silkworm larvae. The BmFer1 mRNA abundance was up-regulated in hemocytes, but not in fat body, after Pseudomonas aeruginosa or Staphylococcus aureus infection. The infection resulted in elevated iron levels in the hemolymph. Injection of recombinant BmFer1 protein into hemocoel reduced the plasma iron level after infection, limited the bacterial growth in the hemolymph, and resulted in a lower mortality caused by infection. Our study indicated that B. mori ferritin-1 may restrict iron access of the invading bacteria to block their growth as a defense strategy.
journal_name
Dev Comp Immunoljournal_title
Developmental and comparative immunologyauthors
Otho SA,Chen K,Zhang Y,Wang P,Lu Zdoi
10.1016/j.dci.2015.10.022subject
Has Abstractpub_date
2016-02-01 00:00:00pages
152-8eissn
0145-305Xissn
1879-0089pii
S0145-305X(15)30066-5journal_volume
55pub_type
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