Effect of PDGF-Rb antagonist imatinib on endometrial injury repairing in mouse model

Objective: To study the effects of PDGF-Rb antagonists imatinib on endometrial injury repairing in the mouse model. Methods: The cultured MSCs cells from male mice were marked with Brd U in vitro, and then transplanted to the female mice which suffered from radiation injury through tail vein, PDGF-Rb antagonists imatinib was injected through abdominal cavity. Four groups were arranged, which were radiation transplantation group, normal control group, imatinib intervention group and radiation control group. Brd U incorporation, SRY expression and MVD status were detected in uterus of mice. Results: SRY gene was negative expressed in normal control group and radiation control group. SRY gene presented positive in radiation transplantation group and imatinib intervention group; Brd U incorporation showed negative in radiation control group and normal control group which died in the early stage in mice; the incorporation of Brd U was higher in radiation transplantation group compared with imatinib intervention group; CD34 was positive on the uterus of all the four groups,which showed highest in radiation control group and lowest in radiation control group; The MVD in imatinib intervention group was lower than radiation control group; the difference of MVD was significantly compared with normal control group(P<0.05). Conclusions: PDGF-Rb antagonists imatinib could inhibit the repairing function of MSCs in the endometrial lesions in mice.

Aberrant Expression of TNF-α and TGF-β_1 mRNA in Spontaneous Abortion

Objective To investigate the aberrant expressions of TNF-α and TGF-β1 in peripheral blood mononuclear cells （PBMCs） and placental tissues in patients with early spontaneous abortion Methods Using the technique of semi-quantitative reverse transcript-polymerase chain reaction （RT-PCR）, TNF-α mRNA and TGF-β1 mRNA in PBMCs were measured in spontaneous abortion group （30 cases）, normal pregnancy group （25 cases） and nonpregnant group （25 cases）. The expressive intension of TNF-α protein and TGF-β1 protein in placental tissues was also identified by immunohistochemistry. Results Both levels of TNF-α mRNA and TGF-β1 mRNA expressed in PBMCs were significantly different between the three groups respectively （P〈0.05）. Levels of TNF-α in syncytiotrophoblastic and cytotrophoblastic cells of the two aborted groups were substantially higher than those of the nonregnant group （P〈0.01）, but the levels of TGF-β1 in syncytiotrophoblastic cells of the two aborted groups were markedly lower than those of the non-pregnant group （P〈0.01）. Conclusion There is potential relation between TGF-β at the fetomaternal interface and spontaneous abortion. TGF-β1 may contribute to the maintenance of pregnancy, and low-level expression of TGF-β1 may be associated with pregnancy failure.

Assisted Reproduction of Pretreatment with Laparoscopic “Core-pulling” Salpingectomy for Patients with Hydrosalpinx before in vitro Fertilization Embryo Transfer

Objective To investigate the reproduction-assisting effects of laparoscopic ＂corepulling＂ salpingectomy for patients with hydrosalpinx on ovarian reserve,responsiveness to stimuli and outcomes of in vitro fertilization and embryo transfer（IVF-ET）.Methods Infertile females receiving treatment in Reproductive Medicine Center of Yantai Yuhuangding Hospital due to fallopian tube disorders（n=214） were enrolled from July 2006 to December 2007 and further divided into three groups.＂Core-pulling＂ procedure group（group A） consisted of patients receiving pretreatment with ＂corepulling＂ salpingectomy due to hydrosalpinx in our center（n=31）,wherein 16 patients received IVF-ET.Conventional procedure group（group B） consisted of patients receiving conventional salpingectomy for hydrosalpinx or ectopic pregnancy in our center or other institutes prior to IVF-ET（n=59）.Control group（group C） consisted of patients receiving IVF-ET without the history of previous hydrosalpinx or salpingectomy（n=124）.Results At baseline,the antral follicle count of group B was significantly less than that of groups A and C（8.6±2.5 vs 8.3±2.0 vs 9.8±2.4）.The mature oocytes retrieved numbered less than the other two groups,in a statistically significant manner compared with group C（13.1±5.7 vs 10.6±5.0 vs 12.0±6.2）.Patients of groups A and B received more gonadotropin while the dosage of group B differed significantly from group C（31.0±17.7 vs 37.6±8.3 vs 30.0±4.6）.E2 level on hCG injection day was slightly lower in group B than in the other two groups,statistically significant compared with that of group C,but not compared with that of group A.After receiving IVF-ET,patients of group A showed significantly higher conception rate than groups B and C（62.5% vs 43.6% vs 39.2%）.Conclusion Compared with the conventional procedure,laparoscopic ＂core-pulling＂ salpingectomy should be recommended for patients with hydrosalpinx intending to receive IVF-ET,which did not interfere with the ovarian reserve or responsiveness but improve the conception rate in clinical practice.