RESUMO
The new costimulatory molecule B7-H4,also called V-set domain containing T cell activa-tion inhibitor 1(VTCN-1),is a member of the B7 family.B7-H4 can negatively regulate the immune response of T lymphocytes through inhibiting their proliferation and cytokine production .The expression of B7-H4 plays an important role in initiation ,progression and regression of malignant tumors ,including female malignant tumor , such as breast cancer ,ovarian cancer and uterine neoplasm .The association between the female tumors and B 7-H4 causes great concern in recent years .In this review,the function of B7-H4 in female tumor research and the potential target of B7-H4 in the diagnosis and treatment of female tumor are summarized .
RESUMO
Objective To evaluate the association between the polymorphisms of BT-H4 gene and the risk of breast cancer, a case-control study was conducted in the population of Heilongjiang province, China. Methods We genotyped the single nucleotide polymorphisms of rs10754339, rs10801935 and rs3738414 in B7-H4 gene by PCR-RFLP in a Chinese population consisting of 287 breast cancer cases and 305 controls matched for age and sex, tagged all common haplotypes (frequency ≥ 1%), and analyzed the differences between patients and normal controls. Results Our data indicated that in rs10754339, the frequencies of G allele, AA genotype and AG genotype were significantly different between patients and controls (P=0.030, OR 1.359, 95 % CI 1.030-1.794; P=0.018, OR 0.671, 95 % CI 0.482-0.935; P=0.029, OR 1.455, 95 % CI 1.038-2.038, respectively). In rs3738414, the frequencies of A allele, GG genotype and AG genotype were significantly different between patients and controls (P=0.0008, OR 0.604, 95 % CI 0.455-0.803; P=0.001, OR 1.804, 95 % CI 1.289-2.253; P=0.005, OR 0.612, 95 % CI 0.435-0.862). The frequencies of AAA haplotype and GAG haplotype were significantly different between patients and controls (P=0.0015, OR 0.614, 95 % CI 0.456-0.828; P=0.0003, OR 1.954, 95 % CI 1.363-2.803). Conclusion Polymorphisms of B7-H4 gene appear to be associated with breast cancer in the population of Heilongjiang province, China.
RESUMO
Objective To observe the inhibition effect of chitlsan oligosaccharide on tumour. Methods The growth of tumour were observed after chitlsan oligosaccharide was injected into abdominal cavity(ip) or introtumour of mice;And the anti proliferation activities of chitlsan oligosaccharide on cells were evaluated by means of MTT assay. Results Growth of tumour were inhibited by chitlsan oligosaccharide, necrosis was observed in the tumour tissue.Chitlsan oligosaccharide affected the growth of cell. The effect was related to concentration of chitlsan oligosaccharide,but not depending of culture time.The apoptosis of cells could be seen under the transmission electron.Conclusion Chitlsan oligosaccharide could inhibit the growth of tumour and might induce apoptosis of cell.