Effect of Pentoxifylline on the ICSI Program Undergone in Severe Asthenozoospermia / 대한불임학회지

OBJECTIVE: The aim of this study was to evaluate the effect of Pentoxifylline(PF) on the conventional ICSI program undergone in severe asthenozoospermia. METHOD: Total 348 cycles of ICSI programs undertaken at CHA General Hospital from January, 1996 to September, 2000, were divided into two groups - injected with pentoxifylline-treated sperm(PFT, 204 cycles) or non-treated sperm(NPFT, 144 cycles) and the clinical results of PFT group were compared with those of NPFT. RESULTS: PF-treatment on sperm increased their motility of normozoospermia and severe asthenozoospermia. Fertilization rate of PFT group was higher than those of ICSI programs undertaken using sperm of NPFT(70.6% vs. 62.9%, p<0.01). And, ET and clinical pregnancy rates of PFT were slightly higher than those of NPFT(93.1%, 44.2% vs. 90.3%, 36.2%). CONCLUSION: These results showed that treatment of pentoxifylline has a beneficial role on selection of viable sperm in severe asthenozoospermia.

Successful pregnancies using frozen thawed testicular sperm in ICSI program / 대한산부인과학회잡지

There are not much reports concerning with clinical results using frozen-thawed testivular sperm in ICSI program. It is speculated that the necessity of cryopreservation of testicular sperm to avoid repeating surgical procedure for obtaining sperm for ICSI. This study was carried out to confirm whether frozen-thawed testicular sperm could be fertilized and pregnancy could be achieved using embryos fertilized with frozen-thawed testicular sperm in ICSI program or not. Testicular sperm obtained from obstructive- or non-obstructive azoospermia patients were co-cultured for 3 days with Vero cells to improve sperm motility. By co-culturing with Vero cells for 3 days, O-ll% of sperm motility after thawing increased up to 8-42% after co-culturing. ICSI was performed using frozen-thawed, and co-cultured sperm with 66 oocytes obtained from 8 patients and 62 oocytes were survived and 49(79.0%) oocytes were fertilized normally. Embryo transfer was possible in 7 out of 8 patients, and pregnancy was achieved in 6 patients(85.7%). These results indicated that not only fresh testicular sperm but frozen-thawed testicular sperm can be used in ICSI program.

Analysis of Chromosomal Abnormalities of Sperm from Patients with Advanced Age by FISH Method / 대한산부인과학회잡지

Determmation of the chomosomal constitution of human spermatozoa has been camed out though the human-hamster interspecific in vitro fertilization(IVF) system. In recent years, the introduction of fluorescence in-situ hybridization(FISH) technique has provided an alternative approach to evaluate the cbmmosomal constitution of human spermatozoa. The nuclei of mature spermatozoa are highly condensed with interpmtamine disulphide bridges, therefore the success of FISH on interphase human spermatozoa relies on partial decondensation of the sperm chromatin. In early studies, dithioothreitol(DTT) has been known as an efficient decondensation agent. Since then, several different decondensation methods using D1T have been establisdhed, and in terms of decondensation, we were tried to fix the optimal decondensation protocol using DlT. In our study, the optimal concentration and treatment time were 1-mM and 30 min, respectively. We examined chromosome complements of human sperm to investigate the effect of paternal age on the hequency of nondisjunction in human sperm. We investgated sperm karyotypes ftom two diffaent age groups)28+/-0.5, 46+/-6), A minimum of 1000 spermatozoa for one patient were analyzed. The mean frequencies of YY, XX, XY, 21-disamy spermatozoa ware 0.04%, 0.45%, 0.40%, 0.45% respectively in young age group and 1.06%, 0.62%, 1.06%, 0.76% in old ages. The mean frequency of disomy spermatozoa was higher in old age poup compare with those of young age group.

Diagnosis of Fragile X Syndrome and DMD by using DIG System / 대한산부인과학회잡지

The aim of this study was to develop a rapid and safe non-radioactive DIG DNA labeling and detection for Southern blot analysis for fragile X syndrome and Duchenne muscular dystrophy (DMD). Southern blot analysis is accurate test showing expression of the (CGG)n repeat and abnormal methylation pattern of CpG island in hagile X syndrome, and good confirmative secondary test in case of deletion in DMD. But in terms of test rapidity, these conventional radioactive Southern analysis may not be feasible for rapid screening of prenatal samples and at-risk populations to determine their status and to provide genetic counseling to their families. As an alternative radioactive Southern blotting, DIG DNA labeling and detection system does not require handling of radioactive material nor require learning any new technology. The complete procedure of labeling the DNA and hybridization to detection of the first visible signal can be compbsbed witbin 7 days. In addition, hybridization solutions containing labeled DNA can be reused several times after renewed denaturation.

Prenatal Cytogenetic Analysis of 145 Fetuses Conceived by Intracytoplasmic Sperm Injectiion ( ICSI ) / 대한산부인과학회잡지

Prenatal diagnoses were performed in 145 fetuses resulting from 73 singleton and 36 twin pregnancies, all established by intracytoplasmic sperm injection (ICS: amniocentesis in 108 patients and Chorionic villus sampling in one. The prenatal cytogenetic results were obtained from pregnancies after ICSI using ejaculated spermatozoa, epididymal spermatozoa, testicular spermatozoa and after the replacement of frozen-thawed embryos derived from ICSI. The Karyotypes were normal in 138 cases (95.2%) of the prenatal diagnoses and there were 2 cases (1.4%) de novo and 5 cases (3.4%) inherited chromosomal aberrations. The two cases of de novo abnormalities were: 46, XY, t(6;7)(q21;p22) and 47, XY, +21 (trisomy 21).

The Effects of Vero Cells Coculturing on the Motility of Human Testicular Spermatozoa in an Intracytoplasmic Sperm Injection Program / 대한불임학회지

No abstract available.

The Effect of Anti-Sperm Antibodies on Conventional IVF and Intracytoplasmic Sperm Injection (ICSI) / 대한불임학회지

The purpose of this study was to examine the effects of anti-sperm antibody (ASA) on the fertilization processes using conventional IVF and ICSI procedure in human and hamster oocytes. In human IVF, we have observed restricted fertilization with sperm testing positive for ASA. (23~90% IgA, 60-97 % IgG). However, if ICSI was perform in the next IVF cycle with the same patients, we could successfully fertilize the oocytes (37%; p<0.001), thus achieving pregnancy and delivery. When the sperm were cocultured in medium containing ASA, there were binding of ASA to sperm surface. In addition, the mean rate of the acrosomal reaction in an in vitro acrosome reaction test was lower for Ab-bound sperm (43.5%) than for Ab-free sperm group (51.3%, p<0.05). We used human sperm and hamster oocytes to confirm the negative effects of the ASA on fertilization. The sperm and/or oocytes have been expose to medium containing ASA before IVF and ICSI. In this experiment, the ASA was bound to the oocyte and sperm surface. The following results were obtain by using various combinations of ASA free or ASA bound sperm with ASA free or ASA bound oocytes for IVF. When ASA free sperm were inseminate with ASA free and ASA bound hamster oocytes, the fertilization rates are 89.6% and 74.3% respectively. However, when ASA bound human sperm were use the results were 62.5% and 55.6% respectively. These shows the fertilization rate was significantly decreased in both ASA bound and ASA free oocytes when using ASA bound sperm. No difference found when ASA are present on the oocyte surface. When the hamster oocytes was treated by ICSI with ASA free or ASA bound human spermatozoa, no significant difference was found. These results showed that ICSI is the most promising method for couples who fertilization was not possible by conventional IVF because of ASA.