In our study, the
presence and expression of P27 gene in L.tropica evaluated in
promastigotes by PCR and RT-PCR using specific primer pairs
that manually designed after determine the consensus sequence of
forward and reverse region of primers bet
ween species of
Leishmania by using MUSCLE (Multiple Sequence Comparison by
Log- Expectation) tool for alignment. The results proved the
presence of P27 gene in Leishmania tropica, beside presence the
mRNA of P27 gene that confirm that P27 expressed in
promastigote form of L.tropica
Smoking tobacco is probably the single most significant source of
toxic chemical exposure to humans, and that affects many human
organs .smoking is a major risk factor for various types of
cancers.The specimenen compassed of two groups of voluntee
rs:
the group included 20 volunteers of smokers, the second
group included14 volunteers of non-smokers as a control group.
Surgical biopsy from oral buccal mucosa were taken and stained
with ( P21,p27 clone) antibody by IHC, and we count the positive
stained cells in two study groups to show if the gene p21,p27 is
affected by cigarette smoking, and investigate the possibility of a
mutation in it .statistical clear differences between the two groups .
the control group is negative while the two groups was positive.