Differential expression of mRNAs encoding laminin chain variants during in vitro development of mouse blastocysts.
Expression of mRNAs encoding ten laminin chain variants was studied by reverse transcription-polymerase chain reaction (RT-PCR) of mRNA extracted from cultured mouse blastocysts. alpha1, beta1 and gamma1 mRNAs, of which products form laminin-1, were the only chains expressed in blastocysts before hatching. alpha4 and alpha5 mRNAs were additionally expressed after attachment of blastocysts to culture dishes. alpha2 and beta2 mRNAs started to be expressed at the stage of allantois formation. Among ten laminin chains, only the mRNA encoding components of laminin-5 (alpha3, beta3 and gamma2) was missing in embryos up to the stage of allantois formation.
Azimi
M
M
Niimi
T
T
Yoshida
N
N
Kitagawa
Y
Y