Protective Effect of Glutathione Administration on Ovarian Function in Female Rats with Cyclophosphamide-Induced Ovarian Damage

OBJECTIVES

We investigated the potential of glutathione to protect ovarian function in rats exposed to cyclophosphamide by measuring serum anti-Mullerian hormone (AMH) levels, follicle counts, and related parameters.

DESIGN

Forty-two adult female Sprague-Dawley rats were randomly divided into six groups and treated with various combinations of cyclophosphamide, glutathione, and sodium chloride. On day 21, the rats were anesthetized, and their ovaries were removed for examination.

PARTICIPANTS/MATERIALS, SETTING, METHODS

Histopathological examination, serum AMH concentrations, follicle counts, AMH-positive staining of follicle percentages were analyzed. Statistical analysis was performed using a one-way analysis of variance and Tukey's test, with significance set at p < 0.05. Secondary measures encompassed histopathological examination and percentages of AMH-positive staining of follicles.

RESULTS

Significant differences were observed in follicle counts, AMH-positive follicle parameters, and serum AMH concentrations among the six groups. Group 2 (treated with cyclophosphamide) had the lowest primordial, primary, secondary, and antral follicle counts and the highest atretic count. Group 6, treated with cyclophosphamide and 200 mg/kg glutathione, showed improved follicle counts compared to those in group 2. Reducing the glutathione dose to 100 mg/kg was ineffective.

LIMITATIONS

This was an experimental animal investigation with a comparatively modest sample size. Experimental studies should be conducted to determine the optimal dosage and duration of glutathione therapy. Information gathered from an experimental animal model may not yield precisely similar outcomes in humans; therefore, additional investigations are necessary to examine the impact of glutathione on women experiencing POI.

CONCLUSIONS

The anti-oxidative protective effect of directly administered glutathione was demonstrated for the first time. Low-dose glutathione was ineffective, whereas a high dose yielded significant ovarian protection against cyclophosphamide. Our findings provide valuable insights for supplementing clinical trials on the protective effects of glutathione against ovarian damage.

Carbetocin versus Oxytocin with or without Tranexamic Acid for Prophylactic Prevention of Postpartum Hemorrhage after a Vaginal Delivery: A Randomized Clinical Trial

OBJECTIVE

Our study's primary objective was to examine the effects of four different prophylactic protocols on the prevention of postpartum hemorrhage following vaginal birth, including carbetocin only, oxytocin only, and a combination of carbetocin or oxytocin with tranexamic acid.

DESIGN

A multicentric randomized controlled trial.

PARTICIPANTS/MATERIALS, SETTING, AND METHODS

This multicentric center prospective randomized controlled trial was conducted at the Department of Obstetrics and Gynecology of Bezmialem University and Van Health Teaching and Research Hospital from August 2022 to January 2023. The collected data included age, gravidity, parity, gestational age at birth, duration of delivery stages, prepartum hemoglobin and hematocrit concentrations, changes in hemoglobin and hematocrit concentrations, intrapartum blood loss, estimated blood loss after 2 h of vaginal delivery, Apgar scores at 1 and 5 min, birth weight, and neonatal intensive care unit (NICU) admission. Intrapartum blood loss was objectively measured in milliliters using a postpartum drape with a calibrated bag. The amount of bleeding was measured by subtracting the empty weight of the pads placed under the patient in the patient's bed within 2 h after delivery. Group I: carbetocin 100 μg/mL (n = 75), group II: oxytocin 5 IU/mL (n = 75), group III: carbetocin and tranexamic acid 50 mg/mL (n = 75), group IV: oxytocin and tranexamic acid (n = 75).

RESULTS

The hemoglobin concentration decrease significantly differed between groups (1.03 ± 1.04, 1.3 ± 0.85, 1.4 ± 0.85, 1.41 ± 0.87, respectively; p < 0.001). Group 4 has the highest decrease in hemoglobin and hematocrit concentrations. When we investigated the subgroup differences, the decrease in hemoglobin concentration was significantly higher in group 2 than group 1 (1.30 ± 0.85 vs. 1.03 ± 1.04; p = 0.023), in group 2 than group 3 (1.3 ± 0.85 vs. 1.04 ± 0.9; p = 0.013), and in group 4 than group 3 (1.41 ± 0.87 vs. 1.04 ± 0.9; p < 0.001). The decrease in hematocrit level was significantly different between groups (3.07 ± 3.23, 3.55 ± 2.44, 2.13 ± 3.09, 4.25 ± 2.52; p < 0.001, respectively). No significant differences were observed in terms of mean blood loss between the four groups (277.19 ± 208.10, 294.13 ± 198.64, 274.33 ± 199.57, and 283.97 ± 178.11; p = 0.445, respectively). Furthermore, there was no significant difference between the groups in the rate of need for blood transfusion (1.3%, 5.4%, 4%, and 4%, respectively; p = 0.6).

LIMITATIONS

The most important limitation of the study is a relatively small number of participants.

CONCLUSION

In conclusion, our findings suggest that carbetocin may be more successful than oxytocin and oxytocin plus tranexamic acid regimens in terms of postpartum hemoglobin reduction, and there is no difference in terms of the need for blood transfusion when it is used for postpartum hemorrhage prophylaxis after vaginal delivery.

Cannabidiol as a potential novel treatment for endometriosis by its anti-inflammatory, antioxidative and anti-angiogenic effects in an experimental rat model

RESEARCH QUESTION

Can cannabidiol (CBD) be used in the treatment of endometriosis for its anti-inflammatory, antioxidative and antiangiogenic effects?

DESIGN

Endometrial implants were surgically induced in 36 female Wistar albino rats. After confirmation of endometriotic foci, the rats were randomized into four groups. In the leuprolide acetate group, rats were given a single 1 mg/kg s.c. leuprolide acetate injection. The other groups were 5 mg/kg CBD (CBD5), saline solution and 20 mg/kg CBD (CBD20); daily i.p. injections were administered for 7 days. After 21 days, the rats were euthanised, and total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI), interleukin-6 (IL-6) and tumour necrosis factor-alpha (TNF-α) measurements in blood and peritoneal fluid samples, and immunohistochemical staining for TNF-α, IL-6 and vascular endothelial growth factor (VEGF) of endometriotic tissues were evaluated.

RESULTS

Significant reductions in the endometriotic implant surface area (P = 0.0213), serum TOS (P = 0.0491), OSI (P = 0.0056), IL-6 (P = 0.0236), TNF-α (P = 0.0083) and peritoneal fluid OSI (P = 0.0401), IL-6 (P = 0.0205) and TNF-α (P = 0.0045) concentrations were observed in the CBD5 group when compared with the saline solution group. Compared with the saline solution group, increased TAS concentrations in serum (P = 0.0012) and peritoneal fluid (P = 0.0145) were found in the CBD5 group. The CBD5 and leuprolide acetate groups were similar regarding inflammatory and oxidative stress parameters of serum and peritoneal fluid samples. The CBD5 group showed significantly lower mean intensity in both surface epithelium and stromal cells for VEGF (both P = 0.002) and only in surface epithelium cells for IL-6 (P = 0.0108), when compared with the leuprolide acetate group.

CONCLUSION

Due to its anti-inflammatory, antioxidative and antiangiogenic effects, CBD might be a therapeutic agent candidate for endometriosis.

Analysis of preoperative and postoperative quality of life, sexual function, and sleep in patients with endometriosis: a prospective cohort study

PURPOSE

Endometriosis affects the quality of life, sleep, and sexual life of patients due to pain. This study compared the scores of endometriosis patients in these three areas before and after surgery.

METHODS

Patients between the ages of 18 and 60 with a prediagnosis of endometriosis were enrolled. Postoperative histopathological diagnosis of endometriosis was confirmed in all patients. This study included 56 patients who completed pre- and postoperative (three months) evaluation of quality scale questionnaires: a visual analog scale for pelvic pain, the Pittsburgh Sleep Quality Index, Morningness-Eveningness Questionnaire, Endometriosis Health Profile-30 Questionnaire, and Female Sexual Function Index were administered prior to and 3 months after each patient's surgery.

RESULTS

Among the 56 female patients included in this study, statistically significant improvement was observed in pain scores, quality of life, sexual function, and sleep of all patients regardless of endometriosis stage.

CONCLUSION

Endometriosis is a disease that progresses, with increasing pain scores; it has negative effects on the quality of life, sexual function, and sleep of patients. Surgical or medical treatment can be performed considering the complaints and fertility status of the patients.

Sleep, depression, anxiety and fatigue in women with premature ovarian insufficiency

PURPOSE

To assess sleep disturbances, levels of anxiety, depression and fatigue in women with premature ovarian insufficiency (POI).

MATERIALS AND METHODS

The study included 62 women with POI and 62 age-matched controls. Women in both groups completed questionnaires. Pittsburgh Sleep Quality Index, Insomnia severity index, Epworth Sleepiness Scale, Hospital Anxiety and Depression Scale and Fatigue Severity Scale were used.

RESULTS

We found poor sleep quality, higher levels of insomnia in women with POI than in controls. Depression was much more prevalent and severe in POI women. Total anxiety score, the severity of anxiety and fatigue did not differ significantly between the groups. According to the multivariable logistic regression analysis, being married and having POI were associated with worse quality of sleep, and having more children was associated with an increase in depression levels in the whole cohort. Backward analysis showed that when POI status was taken as a reference, married women were at 6.5 fold increased risk of poor sleep quality.

CONCLUSIONS

Women with premature ovarian failure are more likely to suffer from poor sleep quality, insomnia and depression than healthy women.

Suture type for hysterotomy closure: a systematic review and meta-analysis of randomized controlled trials

OBJECTIVE

Recent randomized controlled trials have demonstrated an association between uterine closure technique at the time of cesarean delivery and short- and long-term operative outcomes with varied results. This systematic review and meta-analysis aimed to examine types of suture material used for cesarean delivery.

DATA SOURCES

Scopus, PubMed, Cochrane Central Register of Controlled Trials, Ovid, and ClinicalTrials.gov were searched from inception of each database to October 2021.

STUDY ELIGIBILITY CRITERIA

All randomized controlled trials that compared types of suture materials used for hysterotomy closure during low-transverse cesarean delivery at ≥24 weeks' gestation and examined maternal outcomes were included for this review. The primary outcome was estimated blood loss. Secondary outcomes included additional surgical complications.

METHODS

Results were summarized as mean difference or risk ratio with associated 95% confidence intervals. The quality of studies was evaluated with the Cochrane Handbook for Systematic Reviews of Interventions for judging risk of bias. Heterogeneity was measured using I-squared (Higgins I2).

RESULTS

This review included 7 randomized controlled trials, of which 3 compared multifilament with barbed suture (136 vs 136 participants), 3 compared multifilament with conventional monofilament suture (245 vs 244 participants), and 1 trial compared multifilament with chromic suture (4590 vs 4595 participants). Primary analysis showed no difference in estimated blood loss between the multifilament and the barbed suture group (mean difference, 46.2 mL; 95% confidence interval, -13.6 to 105.9), nor in change in hemoglobin concentration between the multifilament and the conventional monofilament group (mean difference, -0.1%; 95% confidence interval, -0.5 to 0.3). Secondary outcomes showed a reduction in operative time with barbed vs multifilament suture (mean difference, 1.9 minutes; 95% confidence interval, 0.03-3.8). Analysis also demonstrated an increased uterine scar thickness with use of conventional monofilament vs multifilament suture (mean difference, -1.05 mm; 95% confidence interval, -1.9 to -0.2).

CONCLUSION

This meta-analysis does not support a specific type of suture material for uterine closure at cesarean delivery because of insufficient data. Although barbed suture was associated with an overall decrease in operative time, and use of conventional monofilament suture was associated with an increase in uterine scar thickness, the clinical utility of these differences is not clear. Further adequate randomized controlled trials are warranted for evaluation of different suture materials for hysterotomy closure.

Cardiometabolic profiles in women with adenomyosis

The aim of this study was to investigate the reproductive profiles, metabolic parameters and cardiometabolic risk assessed by surrogate indexes in women with adenomyosis. Ninety-six premenopausal women who were diagnosed with adenomyosis by transvaginal ultrasound and 97 age-body mass index (BMI) matched controls with normal ultrasound during routine examination were included. Women with adenomyosis were more likely to have higher gravidity and had more abortions than women without adenomyosis. Regarding the individual metabolic syndrome components, the adenomyosis group was more likely to have higher prevalence of hypertension, low HDL-C and central obesity. No significant difference was found between the groups in terms of visceral adiposity index, lipid accumulation product and fatty liver index. Only higher blood pressure (BP) remained statistically significant after adjustment for confounding factors in multivariate analysis. Women with adenomyosis had remarkably high risk of hypertension. It may be advisable to monitor their BP closely.Impact StatementWhat is already known on this subject? The only anthropometric characteristic assessed in women in relation to adenomyosis is body mass index (BMI). A case-control study showed that women who are obese are more likely to have adenomyosis. The gravidity, number of spontaneous abortions and previous uterine surgeries such as dilatation and curettage (D&C) and caesarean section were found significantly associated with adenomyosis.What do the results of this study add? A remarkable finding of our study was the increased incidence of higher systolic BP in women with adenomyosis. No difference was observed in adiposity indices between women with and without adenomyosis. Higher prevalence of central obesity and lower HDL-C levels were seen in women with adenomyosis.What are the implications of these findings for clinical practice and/or further research? The study identifies that adenomyosis is associated with an increased risk of hypertension, and women with adenomyosis may be monitored closely for blood pressure changes. Our report also provides novel information about the metabolic risk profiles associated with adenomyosis.

P-579 The effect of serum progesterone level on ET Day and the efficacy of rescue progesterone treatment on ongoing pregnancy rates with artificial FET cycles

Study question

To evaluate serum progesteron level on ET day during FET cycles with a vaginal progesterone tablet plus weekly twice IM progesteron; to determine the efficacy of resque sc progesteron treatment

Summary answer

Resque daily sc progesterone treatment can improve PRs. The measurement of progesterone on ET day may create a chance to resque treatment on ET day.

What is known already

Successful implantation requires a suitable decidualized endometrium combined with a good quality embryo. The secretory phase of endometrium induced by progesterone is one of the most crucial steps for a proper implantation process and continuation of pregnancy. Recently, with improved cryopreservation techniques, Frozen–thawed embryo transfer (FET) has commonly used all over the world due to several reasons. Programmed- artificial FET cycles are different in terms of luteal phase because endogenous corpus luteum is absent. Therefore, programmed- artificial FET require hormone replacement treatment including estradiol and progesterone.

Study design, size, duration

We prospectively designed this multi-centric cohort study (NCT04769401) and carried out this study at IVF center of Acibadem Health Group and Bezmialem University Hospital and between February 2021 and September 2021. A total of 238 programmed-artificial FETs, carried out by two expert gynecologists (P.O. and C.F.) were evaluated.

Participants/materials, setting, methods

Estrofem was orally started. At 14 days of estrofem, Progesterone was started (100 mg vaginal progesterone tablet two times per day and 250 mg IM hydroxyprogesterone caproate weekly twice). Serum progesterone level were analysed at ET day and two days later. 25 mg/d of SC progesterone daily was given to patients with low serum progesterone levels at ET day and ET was performed on the same day.

Main results and the role of chance

Of all transfers, 77.2% (127/222) resulted in CP. Although there was no statistically significant difference with regard to CPR, OPR and miscarriage between groups (55,4% vs 61,5%, P = 0.4; 78,2% vs 72,5%, P = 0.5; 21,8/% vs 27,5%, P = 0.5; respectively progesterone levels on ET day ≥10 ng/ml and &lt;10 ng/ml) ongoing PR was higher and misscarriage was lower in patients with serum progesterone levels on ET day ≥10 ng/ml. 84% (n = 54) of patients with low serum progesterone level on ET day reached adequate progesterone level with resque sc progesterone treatment (≥10 ng/ ml). 90% (36/40) of PRs in patient with serum progesterone levels &lt;10 ng/ml on ET day was in patient with reaching adequate serum progesterone level with resque daily sc progesterone treatment. Age, number of previous IVF attempts and the embryo flash position at 1 minutes after ET were significantly lower in patients who conceived (p = 0.002, p = 0.016, p = 0.025, respectively).

Limitations, reasons for caution

The limitation of our study is not to present live birth rate.

Wider implications of the findings

The study demonstrated that adequate progesterone level on ET day is reached in 70,7% with the combination of vaginal progesterone tablet plus 250 mg of IM hydroxyprogesterone caproate. Patients with low progesterone level can achieve similar PR when adequate progesterone level was reached with resque sc progesterone treatment.

Trial registration number

NCT04769401

O-307 Cannabidiol as a potential novel treatment for endometriosis by its anti-inflammatory and anti-oxidative effects in an experimental rat model

Study question

Can cannabidiol (CBD) - a nonpsychoactive constituent of the cannabis plant – be used in the treatment of endometriosis by its anti-inflammatory and anti-oxidative effects?

Summary answer

CBD appears to be a potential novel therapeutic agent in the treatment of endometriosis through inhibiting inflammation and decreasing oxidative stress in a dose-dependent manner.

What is known already

The endocannabinoid system (ECS) consists of various bioactive lipids that are produced endogenously which activate cannabinoid 1-2 receptors (CB1-2). Alterations in ECS are associated with many physiological and pathological conditions throughout the body including endometriosis. The events that play role in the development and growth of ectopic endometriotic implants are proliferation, angiogenesis, and inflammation. By their anti-inflammatory and anti-oxidative effects, phyto and synthetic cannabinoids had been investigated and started being used for diseases with similar mechanisms. CBD is a nonpsychoactive constituent of the cannabis plant which acts indirectly upon the CB-1 receptor and as an inverse agonist of CB-2 receptor.

Study design, size, duration

Endometrial implants were surgically induced in 36 female Wistar-Albino rats in the first surgery. After confirmation of endometriotic foci in the second surgery, the rats were randomized into four groups. Group 1 (leuprolide acetate group) was given a single 1 mg/kg subcutaneous injection of leuprolide acetate. Groups 2,3 and 4 were 5 mg/kg CBD, saline solution (control group), and 20 mg/kg CBD injected groups, respectively, and daily intra-peritoneal (i.p.) injections were applied for seven days.

Participants/materials, setting, methods

After 21 days from the second surgery, the rats were sacrificed and histopathological analysis of endometriotic lesions, total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI), interleukin 1 (IL-1), interleukin 6 (IL-6) and tumor necrosis factor-alpha (TNF-a) measurements in blood and peritoneal fluid samples, and immunohistochemical staining for TNF-a expression in endometriotic tissue were evaluated.

Main results and the role of chance

After treatment, significant reductions in TOS, OSI, IL-1, IL-6 and TNF-α levels in the blood and peritoneal fluid samples and TNF-α expression of endometriotic implants (p &lt; 0.01) and increased TAS (p &lt; 0.01) were found in the CBD 5mg/kg and leuprolide acetate groups.

Limitations, reasons for caution

The limitation is that this is an experimental rat model study.

Wider implications of the findings

This is the first study in the literature that evaluates the effects of a phytocannabinoid -CBD- on endometriosis in a rat model. With its anti-inflammatory and anti-oxidative effects and favorable safety and tolerability profile, it might be a candidate for a novel treatment in endometriosis.

Trial registration number

not applicable

Identification of predictive factors for the probability of pregnancy following ovulation stimulation-intra-uterine insemination cycles in terms of female and male

AIM

To identify which positive prognostic parameters contribute to successful treatment outcomes and the probability of pregnancy by analyzing the results of infertile couples underwent ovulation stimulation (OS) and intra-uterine insemination (IUI) in our clinic.

METHODS

Five hundred and nineteen couples who underwent OS-IUI treatment because of a mild-moderate male factor, unexplained infertility, or anovulation were retrospectively analyzed. The data collected included patient demographics, cycle characteristic, sperm parameters and pregnancy rates. The main outcome measure was pregnancy rate (PR).

RESULTS

Our overall PR was 17.72% (n = 92). In women who did not achieve pregnancy, age, BMI and duration of infertility were significantly higher (P < 0.001, P < 0.001 and P = 0.03, respectively). The IUI indications of higher PR were unexplained infertility (P = 0.018) and primary infertility (P = 0.003). AFC was significantly lower and the total dosage of gonadotropins was significantly higher in women who did not achieve pregnancy (P = 0.001 and P = 0.017, respectively). The number of progressive motile spermatozoa inseminated and the morphology were significantly higher in women who did not achieve pregnancy (P = 0.056 and P = 0.001, respectively). Female age ≤ 30 (OR = 0.87; 95% CI: 0.81-0.95; P < 0.01), BMI ≤23.3 kg/m² (OR = 0.87; 95% CI: 0.80-0.95; P = 0.002) and AFC > 9 (OR = 1.07; 95% CI: 1-1.15; P = 0.034) increase the pregnancy.

CONCLUSION

Younger women, especially those with unexplained infertility, primary infertility, shorter duration of infertility, normal ovarian reserve, higher motile spermatozoa inseminated and sperm morphology, could benefit from OS-IUI.

Does the use of microfluidic sperm sorting for the sperm selection improve in vitro fertilization success rates in male factor infertility?

AIM

To evaluate the clinical outcome of assisted reproductive technology (ART) cycles in couple with male infertility, where the spermatozoa were selected using either a conventional gradient-density centrifugation technique or microfluidic sperm sorting.

METHODS

A total of 181 patients who underwent in vitro fertilization (IVF) because of male factor infertility at the IVF center of Bezmialem and Yeditepe University Hospital were included in this study. All patients were divided into two groups according to the sperm selection method: group I (n = 91): microfluidic sperm-sorting chip; group II (n = 90): density-gradient centrifugation. Data collected included male and female age, type of infertility, duration of infertility, previous IVF attempts, smoking, antral follicle count, total dosage of gonadotropins, maximum estradiol levels, duration of stimulations, endometrial thickness on human chorionic gonadotropin day, total number of oocytes retrieved, number of mature oocytes retrieved, number of pronuclear (PN), sperm parameters, clinical PR and ongoing PR.

RESULTS

There was no statistically significant difference in clinical PR and ongoing PR between groups (49.5% vs 40%, P = 0.2; 44% vs 36.7%, P = 0.3; respectively). The improvement in pregnancy rate was more prominent in patients where the female partner's age is higher than 35 (P = 0.09) and men have a total motile sperm count between 1 and 5 million (P < 0.01).

CONCLUSION

Microfluidic devices, "labs-on-a-chip," are a disposable, easy to use, and inexpensive method for sperm sorting. Our results show that IVF success rates might improve with the use of a microfluidic sperm-sorting chip for sperm selection in male infertility.

2-D and 3-D ultrasonographic characteristics of the ovary in women with PCOS and multifollicular ovaries

In this prospective study, seventy-six patients (PCOS group; n = 36, multifollicular ovary group; n = 40) were evaluated by 2-D and 3-D ultrasonography. VOCAL programme, echogenicity, number of follicles and blood flow parameters were evaluated. The patients with PCOS had a higher total ovarian volume, mean stromal volume and stromal echogenicity (18.6 ± 4.75 to 10.2 ± 3.4 p < .01; 12.23 ± 2.53 to 5.02 ± 2.44 p = .02; score 1:28 to 10 p < .01, respectively). There was no statistically significant difference in terms of mean RI and PI values between the groups (p > .05). 3 D power Doppler parameters included VI, FI, and VFI values of the patients with PCOS were higher when compared to those of the patients with multifollicular ovary (3.82 ± 2.65 to 1.78 ± 1.2, p < .01; 50.76 ± 4.45 to 40.6 ± 3.64, p = .03; and 2.34 ± 1.02 to 1.12 ± 0.65, p = .02, respectively). Our results revealed that total ovarian volume, stromal volume and echogenicity; VFI, VI, and FI could be useful for differential diagnosis in women with PCOS and multifollicular ovaries.Impact statementWhat is already known on this subject? Ultrasonography is considered the new diagnostic tool for PCOS. Enlarged ovaries with multiple small follicles peripherally located around increased ovarian stroma with increased stromal echogenicity are the sonographic features of polycystic ovaries.What do the results of this study add? 3-D Doppler ultrasonography may be more specific in the determination of multifollicular and polycystic ovaries when compared to RI and PI in 2-D Doppler ultrasonography. Moreover, 3-D power Doppler ultrasonography could be useful for differential diagnosis in women with PCOS and multifollicular ovaries.What are the implications of these findings for clinical practice and/or further research? In clinical practice, the differentiation of multifollicular ovaries and polycystic ovaries (PCO) is difficult with the use of 2-D sonography alone. Therefore, 3-D ultrasound and power Doppler may also be used in addition to 2-D ultrasound for the differentiation of multifollicular ovaries and PCO.

Forced Ecosystems and Digital Stepchildren: Reconfiguring Advertising Suppliers to Realize Disruptive Social Media Technology

Research often examines disruption in the context of head-to-head competition between firms and technologies. In contrast, we examine the unique dynamics of disruptive technologies within supplier ecosystems. We do so through an inductive multiple case study set in the global advertising industry from 2008–2013, as the industry grappled with the emergence of social media. Using rich archival and field data, we closely track five global consumer goods manufacturers and their associated advertising suppliers as they attempted to integrate social media into their advertising activities. Our primary contribution is to unpack the process by which firms reconfigure their supplier ecosystems to address disruptive new technologies. Our framework reveals that integrating new technologies may require firms to reconfigure the distributions of both activity and power, and that fundamental trade-offs may leave the value of new technologies unrealized. Broadly, we contribute to research and theory on buyer-supplier relationships, alliances, and technology disruption by bringing a more realistic perspective that considers firms’ network of suppliers and interfirm turf wars in technology adoption.

Hydrosonographic Assessment of the Effect of Two Different Suture Materials on Healing of the Uterine Scar after Cesarean Delivery: A Prospective Randomized Controlled Trial

PURPOSE

This study aimed to compare the effects of two different suture materials, monofilament synthetic absorbable sutures versus multifilament synthetic absorbable sutures, on healing the uterine scar after a cesarean delivery.

METHODS

A total of 95 women between the ages of 18 and 40 who had undergone a primary cesarean section (CS) after the 38^th week of gestation. In Group I (n=48), continuous double-layer unlocked closure of the low transverse uterine incision was performed using monofilament synthetic absorbable sutures. In Group II (n=47), continuous double-layer unlocked closure of the low transverse uterine incision was performed using multifilament synthetic absorbable sutures. Six months after the operation, the integrity of the cesarean scar at the uterine incision site was assessed using hydrosonography. The healing ratio and the thickness of the residual myometrium covering the defect were calculated as markers of uterine scar healing.

RESULTS

No statistically significant differences were observed between the groups with regard to the preoperative hemoglobin concentrations, the change in the hemoglobin concentrations, operating time, and the number of intraoperative additional hemostatic uterine sutures. Mean thickness of the residual myometrium covering the defect was thicker in the monofilament suture group in comparison to the multifilament suture group (7.76±2.11 vs. 5.96±1.69, respectively; p<0.01). The mean healing ratio was significantly higher in the monofilament suture group in comparison to the multifilament suture group (0.76±0.13 vs. 0.60±0.12, respectively; p<0.01) CONCLUSION: Continuous double-layer unlocked closure of the uterine incision at cesarean delivery using monofilament synthetic absorbable sutures decreases the risk of CS scar defect.

Less Blood Loss by Earlier Oxytocin Infusion in Cesarean Sections? A Randomized Controlled Trial

PURPOSE

The aim of our study was to evaluate the positive effect of starting an IV oxytocin infusion early before uterine incision on intraoperative blood loss.

METHODS

A total of 101 women between 18-40 years who underwent a primary elective cesarean section (CS) were included in this randomized controlled trial. The patients were divided into two groups. In Group I (n=51), oxytocin infusion was administered immediately after incision of the visceral peritoneum during CS. In Group II (n=50), infusion was administered immediately after clamping the umbilical cord. The primary outcome was the mean volume of blood loss during CS. The secondary outcomes included the mean reduction in hemoglobin and hematocrit levels, need for additional uterotonics and hemostatic uterine sutures, blood transfusion, post-operative pain score, and additional surgical procedures.

RESULTS

There were statistical significant differences either in the change of the hemoglobin concentration (1.27±0.75 vs.1.74±0.81; p<0.01) or in the change of hematocrit concentration (3.89±2.24 vs. 5.41±2.93; p<0.01). Intraoperative blood loss was significantly lower in Group I when compared to Group II (475.86±150.11 vs. 605.1±203.2; p<0.01).

CONCLUSIONS

Our findings suggest that the starting IV oxytocin infusion early before uterine incision reduces intraoperative blood loss. This could be effective to replace starting IV oxytocin infusion late after umbilical cord clamping or delivery of the placenta.

EINLEITUNG

Das Ziel unserer Studie war es. die positive Wirkung der beginnenden IV Oxytocin-Infusion früh vor der Uterusinzision auf den intraoperativen Blutverlust zu bewerten.

MATERIAL UND METHODIK

In diese randomisierte kontrollierte Studie wurden insgesamt 101 Frauen zwischen 18 und 40 Jahren eingeschlossen, die sich einem primären elektiven Kaiserschnitt unterzogen hatten. Die Patienten wurden in 2 Gruppen eingeteilt. Gruppe I (n=51); Die Oxytocin-Infusion wurde unmittelbar nach der Inzision des viszeralen Peritoneums während der CS verabreicht. Gruppe II (n=50); Die Infusion wurde unmittelbar nach dem Klemmen der Nabelschnur verabreicht. Das primäre Ergebnis war das mittlere Blutverlustvolumen während der CS. Zu den sekundären Ergebnissen gehörte die mittlere Verringerung der Hämoglobin- und Hämatokritwerte, Bedarf an zusätzlichen Uterotonika und hämostatischen Uterusnähten, Bluttransfusion, postoperativer Schmerzscore und zusätzliche chirurgische Eingriffe.

ERGEBNISSE

Es gab statistisch signifikante Unterschiede zwischen der Änderung der Hämoglobinkonzentration 1,27±0,75 vs.1,74±0,81; p<0,01) oder der Änderung der Hämatokritkonzentration(3,89±2,24 vs. 5,41±2,93; p<0,01). Der intraoperative Blutverlust war in Gruppe I im Vergleich zu Gruppe II signifikant geringer (475,86±150,11 vs. 605,1±203,2; p<0,01).

DISKUSSION

Unsere Ergebnisse legen nahe, dass die beginnende intravenöse Oxytocin-Infusion früh vor der Uterusinzision den intraoperativen Blutverlust verringert. Dies könnte wirksam sein, um eine beginnende intravenöse Oxytocin-Infusion zu einem späten Zeitpunkt nach dem Klemmen der Nabelschnur oder der Abgabe der Plazenta zu ersetzen.

The protective effect of platelet-rich plasma administrated on ovarian function in female rats with Cy-induced ovarian damage

PURPOSE

We evaluated the protective effect of PRP on ovarian function in female rats with cyclophosphamide (Cy)-induced ovarian damage.

METHODS

Thirty-two adult female Sprague-Dawley rats were randomly divided into four groups. Group 1 (control-sodium chloride 0.9%; 1 mL/kg, single-dose ip injection), group 2 (Cy); 75 mg/kg, single-dose ip injection and sodium chloride 0.9% (1 mL/kg, single-dose ip injection), group 3 Cy plus PRP, Cy (75 mg/kg, single-dose and PRP (200 μl, single-dose) ip injection), group 4 (PRP, 200 μl, single-dose ip injection). Primordial, antral, and atretic follicle counts; serum anti-Müllerian hormone (AMH) levels; AMH-positive granulosa cells; and gene expression analysis of Ddx4 were assessed.

RESULTS

Serum AMH levels were significantly lower in group 2 compared to groups 1, 3, and 4 (p < 0.01, p < 0.01, and p = 0.04, respectively). A significant difference was found in the primordial, primary, secondary, antral, and atretic follicle counts between all groups (p < 0.01). There was a statistically significant difference in AMH-positive staining primary, secondary, and antral follicles count between the groups (p < 0.01). There was a statistically significant difference in primary, secondary, and antral AMH positive staining follicle intensity score between the groups (p < 0.01). Ddx4 expression in group 4 was highest compared to other groups.

CONCLUSION

Our study may provide evidence that PRP could protect ovarian function against ovarian damage induced by Cy. It could lead to improved primordial, primary, secondary, and antral follicle numbers.

Clinical and metabolic characteristics of Turkish adolescents with polycystic ovary syndrome

The aim of this study was to investigate the clinical, endocrine, metabolic features and prevalence of metabolic syndrome (MBS) in Turkish adolescents with polycystic ovary syndrome (PCOS) and the differences in metabolic parameters between adolescent PCOS with or without the presence of polycystic ovaries (PCO) on ultrasound. Subjects (n = 77) were classified into two groups: oligomenorrhea (O) and clinical and/or biochemical hyperandrogenism (HA) (n = 38), without PCO and O + HA with PCO (n = 39). The control group consisted of 33 age-matched adolescents. Adolescents with PCOS had a significantly higher body mass index (BMI), waist circumference and levels of LH, LH/FSH ratio, triglyceride, insulin, HOMA-IR, free androgen index and lower levels of SHBG and FSH. After adjustment for BMI, LH, LH: FSH ratio remained significantly higher. Adolescents with PCOS had a higher prevalence of MBS. No significant differences in lipid profiles, insulin levels and insulin sensitivity in both the PCOS groups were seen. HDL-C levels were lower in the O + HA + PCO group compared to the controls. BMI may be the major contributing factor in the development of metabolic abnormalities in adolescents with PCOS. Impact statement Many studies have investigated the effect of PCOS on metabolic and cardiovascular risks. It is thought that PCOS increases metabolic and cardiovascular risks. Increase in metabolic and cardiovascular risks associated with PCOS may be handled with early diagnosis and early intervention of PCOS in adolescents, although the diagnosis of PCOS in adolescents could be hard because of the features of PCOS overlapping normal pubertal physiological events. However, early identification of adolescent girls with PCOS may provide opportunities for prevention of well-known health risks associated with this syndrome and reduction of long-term health consequences of PCOS by reducing androgen levels and improving metabolic profile. Our results also support that BMI may be the major contributing factor in the development of metabolic abnormalities in adolescents with PCOS.

Differentiating mouse embryonic stem cells express markers of human endometrium

BACKGROUND

Modeling early endometrial differentiation is a crucial step towards understanding the divergent pathways between normal and ectopic endometrial development as seen in endometriosis.

METHODS

To investigate these pathways, mouse embryonic stem cells (mESCs) and embryoid bodies (EBs) were differentiated in standard EB medium (EBM). Immunofluorescence (IF) staining and reverse-transcription polymerase chain reaction (RT-PCR) were used to detect expression of human endometrial cell markers on differentiating cells, which were sorted into distinct populations using fluorescence-activated cell sorting (FACS).

RESULTS

A subpopulation (50%) of early differentiating mESCs expressed both glandular (CD9) and stromal (CD13) markers of human endometrium, suggestive of a novel endometrial precursor cell population. We further isolated a small population of endometrial mesenchymal stem cells, CD45-/CD146+/PDGFR-β+, from differentiating EBs, representing 0.7% of total cells. Finally, quantitative PCR demonstrated significantly amplified expression of transcription factors Hoxa10 and Foxa2 in CD13+ EBs isolated by FACS (p = 0.03).

CONCLUSIONS

These findings demonstrate that mESCs have the capacity to express human endometrial cell markers and demonstrate potential differentiation pathways of endometrial precursor and mesenchymal stem cells, providing an in vitro system to model early endometrial tissue development. This model represents a key step in elucidating the mechanisms of ectopic endometrial tissue growth. Such a system could enable the development of strategies to prevent endometriosis and identify approaches for non-invasive monitoring of disease progression.

Endometriosis: Epidemiology, Diagnosis and Clinical Management

Purpose of review

Endometriosis is a disease of adolescents and reproductive-aged women characterized by the presence of endometrial tissue outside the uterine cavity and commonly associated with chronic pelvic pain and infertility. Here we review the epidemiology of endometriosis as well as potential biomarkers for detection and with the goal of highlighting risk factors that could be used in combination with biomarkers to identify and treat women with endometriosis earlier..

Recent findings

Early age at menarche, shorter menstrual length, and taller height are associated with a higher risk of endometriosis while parity, higher body mass index (BMI) and smoking are associated with decreased risk. Endometriosis often presents as infertility or continued pelvic pain despite treatment with analgesics and cyclic oral contraceptive pills.

Summary

Despite a range of symptoms, diagnosis of endometriosis is often delayed due to lack of non-invasive, definitive and consistent biomarkers for diagnosis of endometriosis. Hormone therapy and analgesics are used for treatment of symptomatic endometriosis. However, the efficacy of these treatments are limited as endometriosis often recurs. In this review, we describe potential diagnostic biomarkers and risk factors that may be used as early non-invasive in vitro tools for identification of endometriosis to minimize diagnostic delay and improve reproductive health of patients.

Vitamin D status in the first-trimester: effects of Vitamin D deficiency on pregnancy outcomes

OBJECTIVE

To assess serum levels of 25-hydroxyvitamin D [25(OH)D] in the first trimester and to determine the factors affecting deficiency levels and its association with pregnancy outcomes.

METHODS

Serum 25(OH)D concentrations were measured at 11-14 weeks' gestation in 229 singleton pregnancies using liquid chromatography-tandem mass spectrometry.

RESULTS

The median serum 25(OH)D concentration was 10.8 ng/mL and 45.9% of women had severe vitamin D deficiency with concentrations of <10 ng/mL. Logistic regression analysis revealed that covered dressing style, lack of multivitamin intake, season of blood sampling (November-April) were factors associated with 25(OH)D deficiency. There was a negative correlation between 25(OH)D levels and gestational age at sampling. Low 25(OH)D levels were not associated with adverse pregnancy outcomes. Higher rate of cesarean section (CS) was noted in women with 25(OH)D ≥10 ng/mL compared to those with 25(OH)D < 10mg/ml (p= 0.01).

CONCLUSION

A high prevalence of vitamin D deficiency was observed in early pregnancy which was related to dress code, use of multi-vitamins and season at sampling. Low 25(OH)D levels were not related with adverse pregnancy outcomes. Women with severe vitamin D deficiency were more likely to deliver vaginally.

The early pregnancy volume measurements in predicting pregnancy outcome

OBJECTIVE

The authors' aim was to develop a logistic regression model based on the ultrasonographic parameters on maternities which are showing a healthy improvement process during the first trimester of pregnancy.

MATERIAL AND METHODS

Using 2D transvaginal ultrasound imaging, the crown rump length (CRL), yolk sac (YS), and gestational sac (GS) diameters were recorded in 225 women with gestational age < 11 weeks. Simplified V = 0.523 x length x height x width formula was used for the volume calculations. The results which ended in abortion were not included in the study.

RESULTS

Linear regression analyses between yolk sac volume (YSV), YSV = 0.026 + 0.0018 x CRL (r²: 0.15; p < 0.001), gestational sac volume (GSV), GSV= -9.6 + 1.7 x CRL (r²: 0.52; p < 0.001), and embryo volume (EV), EV = -1.64 + 0.18 x CRL (r²: 0.4; p < 0.001), and CRL was made and a linear relationship was detected. The volume measurements showed a meaningful correlation with the week of pregnancy. The space in the GS (GS volume-embryo volume) increased as the age of pregnancy became older (r² = 0.46; p < 0.001).

DISCUSSION

The first volume value was made in the first trimester by transvaginal ultrasonography, which showed a correlation with the age of pregnancy.

The effect of captopril on endometriotic implants in a rat model

OBJECTIVE

To determine the effects of captopril on experimentally induced endometriosis in a rat model.

STUDY DESIGN

Twenty-four adult, mature female Wistar-Albino rats in which endometriotic implants were induced by transplanting autologous uterine tissue to ectopic sites on the peritoneum. After the endometriotic implants were formed surgically, the 24 rats were randomly divided into three groups. Group 1 (captopril group, eight rats) were given 50 mg kg(-1)d(-1) of oral captopril for 21 d. Group 2 (leuprolide acetate group, eight rats) were given a single 1 mg kg(-1) subcutaneous injection of leuprolide acetate. Group 3 (control) were given no medication and served as controls (eight rats). The surface area of the endometriotic implants and the score of histologic analysis. Also, VEGF and MCP-1 levels in peritoneal fluids and bloods were analyzed.

RESULTS

At the beginning of the medical treatment, the mean surface areas of the endometriotic implants were comparable in all three groups. At the end of the treatment the mean implant surface area in the captopril group and leuprolide acetate group was less than that in the control group. Mean histopathological examination score for the implants post treatment was lower in the captopril and leuprolide acetate groups. Peritoneal fluids VEGF level in the captopril and leuprolide acetate groups was lower than that in the control group. The post-treatment MCP-1 level was also lower in the captopril and leuprolide acetate groups than in the control group. The serum VEGF and MCP-1 levels post treatment were significantly lower in the captopril and leuprolide acetate groups than in the control group.

CONCLUSION

Administration of captopril reduced the size and progression of endometriotic lesions in a rat model.

Application of struvite precipitation coupled with biological treatment to slaughterhouse wastewaters

In this study, struvite precipitation coupled with an activated sludge process was applied to slaughterhouse wastewaters. Biological treatability characteristics of the wastewater were evaluated in a wide organic loading range of 0.06-0.42 g COD (g MLVSS)(-1)d(-1) to assess COD removal as well as the extent of nitrification. Results of biological treatment of raw wastewater indicated that COD removal varied between 88% and 99% and complete nitrification was achieved at 0.1 g COD (g MLVSS)(-1)d(-1) and lower organic loadings. Biological treatment of the struvite-precipitated sample, which required no nitrification, yielded 86% COD removal at the organic removal of 0.3 g COD (g MLVSS)(-1)d(-1). Struvite precipitation of both raw and biologically treated wastewater was at effective stoichiometric magnesium and phosphate doses to ammonia and between pH values of 9.0 and 9.5, providing ammonia concentrations of 20-30 mg N L(-1) in the effluent and being independent of initial concentrations. The application of struvite precipitation both prior to and after biological treatment resulted in similar effluent qualities and provided the additional benefit of having a high-rate activated sludge system instead of a low organic loading system with nitrification-denitrification. An additional benefit of struvite precipitation was the production of sludge which had recovery potential as a fertilizer. Among the tested treatment schemes, biological treatment following struvite precipitation seemed to be more advantageous in terms of process stability.

Effect of different degrees of glucose intolerance on maternal and perinatal outcomes

OBJECTIVE

To evaluate the effect of markedly elevated 50-g glucose loading test (GLT) (>or=200 mg/dL) and equivocal 100-g GLT (one abnormal value) results on maternal and perinatal outcomes.

METHODS

Retrospective analysis of 2029 singleton pregnancies screened for gestational diabetes mellitus (GDM). Maternal and perinatal outcomes in five different groups with different degrees of glucose intolerance were compared. First group consisted of patients with normal 50-g test, second group was formed by patients with abnormal 50-g glucose test but a normal 100-g test. Third group included patients with one abnormal value after 100-g test. Patients in the fourth group were diagnosed to have GDM after an abnormal 100-g test. Patients in the fifth group had a value >or=200 mg/dL after 50-g test and were diagnosed to have GDM.

RESULTS

Macrosomia and large for gestational age incidence were highest in the group with one elevated glucose tolerance test (GTT) value. Hospitalisation rates, hypoglycemia, hyperbilirubinemia and polycythemia were more common in neonates born to mothers with one elevated GTT value and to mothers with a GLT > 200 mg/dL.

CONCLUSION

Adverse maternal and perinatal outcomes in patients with one elevated GTT value and in patients with a GLT value > 200 mg/dL warrant close glucose monitoring and treatment in these groups even in the absence of a diagnostic abnormal GTT.

[Percutaneous endoscopic gastrostomy in the ICU]

Aspiration pneumonia due to gastroesophageal reflux is a frequent complication in ICU. The most commonly chosen method for long-term enteral access is gastrostomy and this method also reduces the risk of aspiration and shortens the hospital stay. We evaluated 31 patients in whom PEG was performed between 1997-98 in our unit. Indication of PEG was long-term ICU stay and coma which necessitate long term enteral nutrition. Mean age of our patients were 60.5((19.4). We evaluated the aspiration by clinical inspection. Aspiration and interruption of feeding was observed 1.57 ((1.43) times before PEG and 0.67 ((0.73) times after PEG. Further more positive tracheal aspirate culture were seen 3.14 ((1.95) times before PEG and 1.52 ((1.47) times after PEG.