Linked Life Data

18677601

Source:http://linkedlifedata.com/resource/pubmed/id/18677601

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2008-8-4
pubmed:abstractText
The highly efficient novel methods to produce transgenic chickens were established by directly injecting the recombinant plasmid containing green fluorescent protein (GFP) gene into the cock's testis termed as testis-medianted gene transfer (TMGT), and transplanting transfected spermatogonial stem cells (TTSSCs). For the TMGT approach, four dosages of pEGFP-N1 DNA/cationic polymer complex were injected intratesticularly. The results showed: (1) 48 h after the injection, the percentages of testis cells expressing GFP were 4.0%, 8.7%, 10.2% and 13.6% in the 50, 100, 150 and 200 microg/mL group, respectively. The difference from the four dosage groups was significant (P<0.05). On day 25 after the injection, a dosage-dependent and time-dependent increase in the number of transgenic sperm was observed. The percentages of gene expression reached the summit and became stable from day 70 to 160, being 12.7%, 12.8%, 15.9% and 19.1%, respectively. The difference from the four dosage groups was also significant (P<0.05). (2) 70 d after the injection, strong green fluorescent could be observed in the seminiferous tubules by whole-mount in-situ hybridization. (3) 70 d after the injection, the semen was collected and used to artificially inseminate wild-type females. The blastoderms of F(1) and F(2) transgenic chicken expressed GFP were 56.2% (254/452) and 53.2% (275/517), respectively. The detection of polymerase chain reaction (PCR) of F(1) and F(2) transgenic chicken blood genomic DNA showed that 56.5% (3/23) of F(1) and 52.9% (9/17) of F(2) were positive. Southern blot showed GFP DNA was inserted in their genomic DNAs. (4) Frozen whole mount tissue sections of F(1) and F(2) transgenic chicken liver, heart, kidney and muscle showed that the rates of green fluorescent positive were between 50.0% and 66.7%. (5) With the TTSSCs method, SSCs ex vivo transfected with GFP were transplanted into recipient roosters whose endogenic SSCs had been resoluted. The donor SSCs settled and GFP expression became readily detectable in the frozen whole mount tissue sections of recepient testes. Moreover, sperms carrying GFP could be produced normally. The results of artificially inseminating wild-type females with these sperms showed 12.5% (8/64) of offspring embryo expressed GFP and 11.1% (2/18) hatched chicks were tested transgenic. Our data therefore suggest TMGT and TTSSCs are the feasible methods for the generation of transgenic chickens.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1006-9305
pubmed:author
pubmed:issnType
Print
pubmed:volume
51
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
734-42
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Efficient generation of transgenic chickens using the spermatogonial stem cells in vivo and ex vivo transfection.
pubmed:affiliation
College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't