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Objective To investigate the effects of self-made carriers on the cryopreservation of ovarian tissue of sheep. Methods Thirty-two ovaries were randomly assigned to fresh group,programmed freezing group,self-made carrier I vitrification group,and self-made carrier Ⅱ vitrification group.The morphology,proliferation,apoptosis,and estrogen level of the ovarian tissue in each group were observed. Results After cryopreservation,the morphology normal rate of the primordial follicles in programmed freezing group,self-made carrier I vitrification group,and self-made carrier Ⅱ vitrification group were 74.2%,72.8%,and 72.3%,respectively,lower than that(83.7%)in the fresh group(χ
Subject(s)
Animals , Female , Cryopreservation , Freezing , Ovarian Follicle , Ovary , Sheep , VitrificationABSTRACT
The age of onset of gynecological malignant tumors tends to be younger,more and more patients have fertility requirements when they are diagnosed with cancer.Different cancer treatments have a certain impact on the fertility of patients, application of assisted reproductive technology(ART)can help part of the patients fulfill their fertility wish. In this paper, the methods and safety of ART for three gynecological malignant tumors are discussed.
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<p><b>OBJECTIVE</b>To study the expression of gene associated with retinoid-interferon-induced mortality-19(GRIM-19) in preimplantation embryo of mice and explore its role in embryonic development.</p><p><b>METHODS</b>The protein and mRNA expressions of GRIM-19 in 2-cell, 4-cell, 8-cell, morula, and blastocyst phases of mice preimplantation embryo were detected by Western blot analysis and Real-time polymerase chain reaction (PCR).</p><p><b>RESULTS</b>GRIM-19 was continuously expressed in every stage of preimplantation embryo of mice. Western blot analysis and Real-time PCR demonstrated a gradual increase of GRIM-19 expression from 2-cell, which reached a peak in 8-cell phase and then decreased progressively.</p><p><b>CONCLUSIONS</b>The expression of GRIM-19 in mouse preimplantation embryos changes as at different developmental phases. GRIM-19 may play an important role during embryonic development.</p>
Subject(s)
Animals , Female , Mice , Pregnancy , Blastocyst , Metabolism , Interferons , Pharmacology , NADH, NADPH Oxidoreductases , Genetics , Metabolism , RNA, Messenger , Genetics , Tretinoin , PharmacologyABSTRACT
<p><b>OBJECTIVE</b>To evaluate the therapeutic effects of bone marrow transplantation (BMT) on ovarian injury induced by chemotherapy in mice.</p><p><b>METHODS</b>Forty-eight mice were randomized equally into normal control group (A), cyclophosphamide and BMT group (B), and cyclophosphamide group (C). The mice in groups B and C were treated with intraperitoneal injection of cyclophosphamide at the daily dose of 150 mg/kg for 3 consecutive days, and allogeneic bone marrow cell transplantation was performed in group B. The ovary coefficient and the amount of follicles were compared to evaluate the function of ovaries. For cell tracking, the bone marrow cells were labeled with Hoechst 33342 and detected through fluorescence microscope after transplantation.</p><p><b>RESULTS</b>On days 21 and 50 after cyclophosphamide treatment, the ovary coefficient and the amount of follicles were significantly lowered in groups B and C (P<0.05), but the reduction was obviously ameliorated in group B (P<0.05). Cell tracking showed the presence of the donor bone marrow cells in the ovaries of the recipients mice after BMT.</p><p><b>CONCLUSION</b>BMT can improve the ovarian function impaired by chemotherapy in mice.</p>
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Animals , Female , Mice , Bone Marrow Transplantation , Cyclophosphamide , Ovary , PathologyABSTRACT
The present paper reviewes the literatures on the electromagnetic characteristic of meridians at home and abroad in the last twenty years. It generally summarize the studies on the electromagnetic characteristic of meridians from the aspects of the imaging of meridians, the electromagnetic model of meridians, and the physiological and pathological observations on the electro changes at acupoints. The results indicate that acupoints apparently have electro characteristics which are associated with the change of the health condition, time, environment, etc. By means of electromagnetic characteristic, the image of meridians can be made and the phenomena of meridians can be clarified, the essence of meridians can be explained in a certain degree. It still demands further research on this characteristic of meridians.
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Humans , Acupuncture Points , Electromagnetic Phenomena , Meridians , ResearchABSTRACT
<p><b>OBJECTIVE</b>To explore the mechanism for adefovir dipivoxil (ADV) resistance occurred in chronic hepatitis B patients of a series of phase III clinical trails.</p><p><b>METHODS</b>30 resistant HBV strains were selected out from 177 cases of ADV treated chronic hepatitis B patients. HBV polymerase RT region were amplified by nested PCR and analyzed with the standard nucleotide sequence of HBV strains deposited in GeneBank.</p><p><b>RESULTS</b>21 out of 30 HBV strains were primary resistant strains, among them 5 HBV strains (23.8%, 5/21) had the polymorphism site of rtN118H. While the other 9 HBV strains showed secondary resistance, variations in conservative region C (rtM207V) and other non-conservative regions were found. The classic mutation sites such as rtN236T and rtA181V/T were not found.</p><p><b>CONCLUSIONS</b>Polymorphism site of rtN118H might be responsible for HBV primary resistance to ADV therapy. rtM207V variation in HBV RT C domain and other variation sites might play a role in HBV secondary resistance to ADV treatment, and natural resistant quasispecies may be the basis for the ADV quick resistance. These conclusions await further confirmation by phenotype test.</p>
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Adult , Female , Humans , Male , Adenine , Pharmacology , Therapeutic Uses , Alanine Transaminase , Blood , Amino Acid Sequence , Antiviral Agents , Pharmacology , Therapeutic Uses , Base Sequence , DNA Primers , DNA, Viral , Blood , Drug Resistance, Viral , Genotype , Hepatitis B virus , Genetics , Hepatitis B, Chronic , Drug Therapy , Genetics , Virology , Molecular Sequence Data , Organophosphonates , Pharmacology , Therapeutic Uses , Polymorphism, Genetic , Genetics , RNA-Directed DNA Polymerase , Genetics , Reverse Transcriptase Inhibitors , Pharmacology , Therapeutic Uses , Reverse Transcriptase Polymerase Chain Reaction , Methods , Sequence Analysis, DNAABSTRACT
<p><b>OBJECTIVE</b>To investigate the development and maturation competence of oocytes retrieved from cryopreserved and transplanted human fetal ovarian tissue by techniques of tissue culture, inducing ovary, oocyte retrieval, and in vitro maturation (IVM).</p><p><b>METHODS</b>Fetal ovaries of 20 weeks were frozen-thawed and cultured for 6 days in vitro, then xenografted into kidney capsules of immunodeficient mice. All mice were stimulated with follicle stimulating hormone every second day for 23 weeks, starting 1 week after grafting. Then oocytes were retrieved from antral follicles 13 hours after human chorionic gonadotrophin injection. IVM was performed to evaluate the maturation competence of the oocytes from ovarian grafts. Human fetal ovarian tissues were examined with histological and proliferating cell nuclear antigen (PCNA) evaluation.</p><p><b>RESULTS</b>There was no difference between fresh ovarian tissues and frozen-thawed ovarian tissues in the percentage of follicles at different growth stages (P > 0.05). The proportion of the primary follicles and preantral follicles in the cultured ovarian tissues was significantly larger than that of fresh ovarian tissues and frozen-thawed ovarian tissues (P < 0.05). The proportion of the primary follicles, preantral follicles, and antral follicles in the transplanted ovarian tissues was significantly higher than that of cultured ovarian tissues, fresh ovarian tissues, and frozen-thawed ovarian tissues (P < 0.05). No significant signals of PCNA in the primordial follicles in all ovarian tissues were observed. PCNA immunoreactivity first appeared in primary follicles. However, the obviously positive signals of PCNA were seen in the oocytes and/or the granular cells of cultured ovarian tissues and transplanted ovarian tissues. Oocytes from antral follicles were collected and matured in vitro, and 21.43% of the oocytes reached to MII within 48 hours IVM.</p><p><b>CONCLUSIONS</b>Human ovarian follicles can survive and develop well after cryopreservation, tissue culture, and xenotransplantation. Furthermore, oocytes recovered from grafts have normal maturation competence.</p>
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Animals , Female , Humans , Mice , Pregnancy , Cryopreservation , Mice, Inbred BALB C , Oocytes , Cell Biology , Oogenesis , Ovarian Follicle , Cell Biology , Transplantation , Transplantation, HeterologousABSTRACT
Hyperthermia therapy with AC magnetic field heating magnetic nanoparticles is a new kind of treatment method. The paper reviews the research progresses about AC magnetic heating setups for hyperthermia therapy measurements of magnetic field temperature control, and so on.