Effects of inter-twin vascular anastomoses of monochorionic twins with selective intrauterine growth restriction on the contents of placental mitochondria DNA.

BACKGROUND: Placental mitochondrial DNA (mtDNA) has been proposed to be an indicator for placental hypoxia. This study was designed to evaluate the effect of vascular anastomoses between monochorionic (MC) twins on placental mtDNA. METHODS: In this study, twin-twin transfusion syndrome (TTTS) treated with laser therapy and MC twins without TTTS (without laser therapy) resulting in two live babies were included in this study. The placental mtDNA fold changes (FC) between the small and large twins were analyzed using real-time quantitative PCR. TTTS twins with selective intrauterine growth restriction (sIUGR) are categorized as group 1, TTTS without sIUGR as group 2, MC twins without TTTS but with sIUGR as group 3, and MC twins without both TTTS and sIUGR as group 4. RESULTS: There were seven cases in group 1, eight in group 2, 26 in group 3, and 24 in group 4 cases. The placental mtDNA FC were significantly higher in group 1 (1.57 ± 0.9) compared to that of the group 3 (0.86 ± 0.6). CONCLUSION: In MC twin pregnancies with sIUGR, the placental mtDNA FC between the small and large twins are different between cases with and without inter-twin anastomoses. These findings suggest that the inter-twin anastomoses in the MC twins with sIUGR may provide rescue perfusion from the appropriate-for-gestational-age twin to the sIUGR one.

Placental erythropoietin expression is upregulated in growth-restricted fetuses with abnormal umbilical artery Doppler findings: a case-control study of monochorionic twins.

BACKGROUND: We previously reported that fetal plasma erythropoietin (EPO) concentrations are significantly increased in growth-restricted fetuses with abnormal umbilical artery (UA) Doppler. During hypoxia in an ovine model, the primary site of fetal EPO synthesis was switched from the kidneys to the placenta. Therefore, we designed this study to evaluate human placental EPO gene expression and the correlation to fetal serum EPO concentration in growth-restricted fetuses in a monochorionic (MC) twin model. METHODS: In MC twin pairs, selective intrauterine growth restriction (sIUGR) was defined as the presence of (i) birth weight discordance of > 20% and (ii) a smaller twin with a birth weight less than the 10th percentile. Fetal UA and middle cerebral artery (MCA) Doppler were checked within 1 week before delivery. An abnormal UA Doppler was defined as persistently absent or reverse end-diastolic flow. Cerebroplacental ratio (CPR) was defined as MCA-pulsatility index (PI)/UA-PI. Fetal plasma EPO concentrations were measured in cord blood, and EPO gene expression was assayed in each twin's placental territory. The intertwin plasma EPO ratio was calculated as the cord plasma EPO level of the smaller (or sIUGR) twin divided by the EPO concentration of the larger (or appropriate-for-gestational-age (AGA)) twin, and the intertwin placental EPO gene expression ratio was calculated similarly. RESULTS: Twenty-six MC twins were analyzed, including normal twins (Group 1, n = 9), twins with sIUGR without UA Doppler abnormalities (Group 2, n = 9), and twins with sIUGR and UA Doppler abnormalities (Group 3, n = 8). The CPRs of smaller (sIUGR) fetuses were significantly decreased in Group 3 MC twins (p < 0.001), but not significantly different between Group 1 and Group 2. The highest fetal plasma EPO ratio and placental EPO gene expression ratio were identified in Group 3 MC twins (p < 0.001). The placental EPO gene expression ratios were significantly correlated with the fetal plasma EPO ratios (Pearson's correlation test, p = 0.004). CONCLUSION: This study provides evidence of increased placental EPO expression in MC twin fetuses with sIUGR and abnormal UA Doppler. Future studies are needed to confirm the similar role of placental EPO in severe IUGR singletons.

NLRP7 affects trophoblast lineage differentiation, binds to overexpressed YY1 and alters CpG methylation.

Maternal-effect mutations in NLRP7 cause rare biparentally inherited hydatidiform moles (BiHMs), abnormal pregnancies containing hypertrophic vesicular trophoblast but no embryo. BiHM trophoblasts display abnormal DNA methylation patterns affecting maternally methylated germline differentially methylated regions (gDMRs), suggesting that NLRP7 plays an important role in reprogramming imprinted gDMRs. How NLRP7-a component of the CATERPILLAR family of proteins involved in innate immunity and apoptosis-causes these specific DNA methylation and trophoblast defects is unknown. Because rodents lack NLRP7, we used human embryonic stem cells to study its function and demonstrate that NLRP7 interacts with YY1, an important chromatin-binding factor. Reduced NLRP7 levels alter DNA methylation and accelerate trophoblast lineage differentiation. NLRP7 thus appears to function in chromatin reprogramming and DNA methylation in the germline or early embryonic development, functions not previously associated with members of the NLRP family.

Nonsynonymous variants in MYH9 and ABCA4 are the most frequent risk loci associated with nonsyndromic orofacial cleft in Taiwanese population.

BACKGROUND: Nonsyndromic orofacial cleft is a common birth defect with a complex etiology, including multiple genetic and environmental risk factors. Recent whole genome analyses suggested associations between nonsyndromic orofacial cleft and up to 18 genetic risk loci (ABCA4, BMP4, CRISPLD2, GSTT1, FGF8, FGFR2, FOXE1, IRF6, MAFB, MSX1, MTHFR, MYH9, PDGFC, PVRL1, SUMO1, TGFA, TGFB3, and VAX1), each of which confers a different relative risk in different populations. We evaluate the nonsynonymous variants in these 18 genetic risk loci in nonsyndromic orofacial clefts and normal controls to clarify the specific variants in Taiwanese population. METHODS: We evaluated these 18 genetic risk loci in 103 cases of nonsyndromic orofacial clefts and 100 normal controls using a next-generation sequencing (NGS) customized panel and manipulated a whole-exon targeted-sequencing study based on the NGS system of an Ion Torrent Personal Genome Machine (IT-PGM). IT-PGM data processing, including alignment with the human genome build 19 reference genome (hg19), base calling, trimming of barcoded adapter sequences, and filtering of poor signal reads, was performed using the IT platform-specific pipeline software Torrent Suite, version 4.2, with the plug-in "variant caller" program. Further advanced annotation was facilitated by uploading the exported VCF file from Variant Caller to the commercial software package Ion Reporter; the free online annotation software Vanno and Mutation Taster. Benign or tolerated amino acid changes were excluded after analysis using sorting intolerant from tolerant and polymorphism phenotyping. Sanger sequencing was used to validate the significant variants identified by NGS. Furthermore, each variant was confirmed in asymptomatic controls using the Sequenom MassARRAY (San Diego, CA, USA). RESULTS: We identified totally 22 types of nonsynonymous variants specific in nonsyndromic orofacial clefts, including 19 single nucleotide variants, 2 deletions, and 1 duplication in 10 studied genes(ABCA4, MYH9, MTHFR, CRISPLD2, FGF8, PVRL1, FOXE1, VAX1, FGFR2, and IRF6). Nonsynonymous variants in MYH9 and ABCA4, which were detected in 6 and 5 individuals, respectively, were identified to be the most frequent risk loci in nonsyndromic orofacial clefts in the Taiwanese population. CONCLUSIONS: Nonsynonymous variants in MYH9 and ABCA4 were identified to be the most frequent risk loci in nonsyndromic orofacial clefts in the Taiwanese population. These findings in our study have provided additional information regarding specific variants associated with nonsyndromic orofacial clefts in different population and demonstrate the power of our customized NGS panel, which is clinically useful for the simultaneous detection of multiple genes associated with nonsyndromic orofacial clefts.

Increased Fetal Plasma Erythropoietin in Monochorionic Twin Pregnancies With Selective Intrauterine Growth Restriction and Abnormal Umbilical Artery Doppler.

Hypoxia is the primary stimulus for the production of erythropoietin (EPO) in both fetal and adult life. Here, we investigated fetal plasma EPO concentrations in monochorionic (MC) twin pregnancies with selective intrauterine growth restriction (sIUGR) and abnormal umbilical artery (UA) Doppler. We diagnosed sIUGR in presence of (1) birth-weight discordance >20% and (2) either twin with a birth weight <10th percentile. An abnormal UA Doppler was defined as a persistent absent-reverse end diastolic flow (AREDF). The intertwin EPO ratio was calculated as the plasma EPO level of the smaller (or small-for-gestational-age) twin divided by the EPO concentration of the larger (or appropriate-for-gestational-age (AGA)) twin. Thirty-two MC twin pairs were included. Of these, 17 pairs were normal twins (Group 1), seven pairs were twins with sIUGR without UA Doppler abnormalities (Group 2), and eight pairs were twins with sIUGR and UA Doppler abnormalities (Group 3). The highest EPO ratio was identified in Group 3 (p < .001) but no significant differences were observed between Groups 1 and 2. Fetal hemoglobin levels did not differ significantly in the three groups, and fetal EPO concentration did not correlate with gestational age at birth. We conclude that fetal plasma EPO concentrations are selectively increased in MC twin pregnancies with sIUGR and abnormal UA Doppler, possibly as a result of uncompensated hypoxia.

Increased absolute lymphocyte count, increased absolute neutrophil count and low platelet to lymphocyte ratio as predicting factors in the superior disease control of refractory/relapsing gynecologic malignancies with anti PD-1 therapy: 10 years of experience in a single institution.

OBJECTIVE: Immune checkpoint inhibitors are rapidly being used in solid and hematologic malignancies, including gynecologic cancers. The high mortality and relapsing rates of advanced gynecologic malignancies remain a challenging issue. This study aimed to identify the predicting factors associated with survival prognosis and disease control in patients with refractory/relapsing (R/R) gynecologic malignancies receiving anti PD-1 therapy. MATERIALS AND METHODS: We retrospectively reviewed the medical records of 49 patients diagnosed with R/R gynecologic malignancies between July 2012 and June 2019 in Chang Gung Memorial Hospital, Taiwan. Among the 49 patients, 6 were excluded due to incomplete medical records or not receiving anti PD-1 therapy. The remaining 43 patients were further divided into responsive and non-responsive groups according to disease control for predicting prognostic factor analysis. RESULTS: For the 43 cases, the median age at diagnosis and disease follow-up length were 54 years and 29 months, respectively. Among them, 23 (53%) were categorized into the responsive group, and the remaining 20 (47%) were categorized into the non-responsive group. The mortality rates were 17% and 25% in the responsive and non-responsive groups, respectively. The responsive group had significantly higher absolute lymphocyte count (ALC), higher absolute neutrophil count (ANC) and low platelet to lymphocyte ratio (PLR) than the non-responsive group. A superior long-term survival trend was also observed in the responsive group, but the difference was not statistically significant. CONCLUSIONS: This study reinforced the hypothesis that high ALC, high ANC and low PLR are associated with superior disease control in patients with R/R gynecologic malignancies receiving anti PD-1 therapy.

Prenatal diagnosis of Simpson-Golabi-Behmel syndrome type 1 with an 814 kb Xq26.2 deletion with the initial presentation of a thick nuchal fold.

OBJECTIVE: Simpson-Golabi-Behmel syndrome type 1 (SGBS1) is a rare X-linked recessive disorder characterized by overgrowth and multiple anomalies. Most clinical diagnoses of SGBS1 are made postnatally. We present the case of a pregnant woman in whom the fetus presented with a thick nuchal fold 5.6 mm at 15 weeks of gestation, leading to the prenatal diagnosis of SGBS1 with Xq26.2 (133408101-134221889) deletion. CASE REPORT: We report the case of a 34-year-old pregnant woman with the initial presentation of fetal thick nuchal fold 5.6 mm at 15 weeks of gestation. Amniocentesis of the fetal karyotype revealed a normal 46, XY, and single nucleotide polymorphism array showed Xq26.2 (133408101-134221889) deletion. Prenatal ultrasound at 21 weeks of gestation revealed a thick nuchal fold, hepatomegaly, nephromegaly, congenital diaphragmatic hernia, hypospadias, and polyhydramnios. Fetal magnetic resonance imaging revealed hepatomegaly, nephromegaly, congenital diaphragmatic hernia, and right lung hypoplasia. The woman had her pregnancy terminated at 24 weeks of gestation. The proband had a general appearance of low-set ears, hypertelorism, a large tongue, and hypospadias and some unique findings on autopsy, including hepatomegaly, right hiatal hernia, liver extensive extramedullary hematopoiesis, kidney marked congestion, and focal hemorrhage. DISCUSSION: The main prenatal ultrasound findings that alert clinical doctors about the possible diagnosis of SGBS1 included macrosomia, polyhydramnios, organomegaly, renal malformations, congenital diaphragmatic hernia, and cardiac anomalies. Our case underscores the importance of fetal karyotyping combined with single nucleotide polymorphism array when a thick nuchal fold is found. Genetic counseling is essential in SGBS1, and prenatal testing or preimplantation testing for subsequent pregnancies is necessary to identify possible pathogenic variants.

Frequency and clinical significance of chromosomal inversions prenatally diagnosed by second trimester amniocentesis.

To compare the frequency and clinical significance of familial and de novo chromosomal inversions during prenatal diagnosis. This was a retrospective study of inversions diagnosed prenatally in an Asian population by applying conventional GTG-banding to amniocyte cultures. Data from 2005 to 2019 were extracted from a single-center laboratory database. The types, frequencies, and inheritance patterns of multiple inversions were analyzed. Pericentric variant inversions of chromosome 9 or Y were excluded. In total, 56 (0.27%) fetuses with inversions were identified in the 15-year database of 21,120 confirmative diagnostic procedures. Pericentric and paracentric inversions accounted for 62.5% (35/56) and 37.5% of the inversions, respectively. Familial inversions accounted for nearly 90% of cases, and de novo mutation was identified in two pericentric and two paracentric cases. Inversions were most frequently identified on chromosomes 1 and 2 (16.1% of all inversions), followed by chromosomes 6, 7, and 10 (8.9% of all cases). The indications for invasive testing were as follows: advanced maternal age (67.3%), abnormal ultrasound findings (2.1%), abnormal serum aneuploidy screening (20.4%), and other indications (10.2%). The mode of inheritance was available for 67.9% of cases (38/56), with 89.5% of inversions being inherited (34/38). A slight preponderance of inheritance in female fetuses was observed. Three patients with inherited inversions opted for termination (two had severe central nervous system lesions and one had thalassemia major). Gestation continued for 53 fetuses, who exhibited no structural defects at birth or significant developmental problems a year after birth. Our study indicates that approximately 90% of prenatally diagnosed inversions involve familial inheritance, are spreading, and behave like founder effect mutations in this isolated population on an island. This finding can help to alleviate anxiety during prenatal counseling, which further underscores the importance of parental chromosomal analysis, further genetic studies, and appropriate counseling in cases where a nonfamilial inversion is diagnosed.

Maternal-Neonatal Outcomes of Obstetric Deliveries Performed in Negative Pressure Isolation Rooms during the COVID-19 Omicron Variant Pandemic in Taiwan: A Retrospective Cohort Study of a Single Institution.

Objective: To investigate the maternal−neonatal outcomes of obstetric deliveries performed in negative pressure isolated delivery rooms (NPIDRs) during the coronavirus disease 2019 (COVID-19) omicron variant pandemic period in a single tertiary center in northern Taiwan. Methods: Confirmed positive and suspected-positive COVID-19 cases delivered in NPIDRs and COVID-19-negative mothers delivered in conventional delivery rooms (CDRs) in the period of 1 May 2022 to 31 May 2022 during the COVID-19 omicron variant pandemic stage were reviewed. The maternal−neonatal outcomes between the two groups of mothers were analyzed. All deliveries were performed following the obstetric and neonatologic protocols conforming to the epidemic prevention regulations promulgated by the Taiwan Centers for Disease Control (T-CDC). Multiple gestations, deliveries at gestational age below 34 weeks, and major fetal anomalies were excluded from this study. Results: A total of 213 obstetric deliveries were included. Forty-five deliveries were performed in NPIDRs due to a positive COVID-19 polymerase chain reaction (PCR) test (n = 41) or suspected COVID-19 positive status (n = 4). One hundred and sixty-eight deliveries with negative COVID-19 PCR tests were performed in CDRs. There was no statistical difference in maternal characteristics between the two groups of pregnant women. All COVID-19-confirmed cases either presented with mild upper-airway symptoms (78%) or were asymptomatic (22%); none of these cases developed severe acute respiratory syndrome. The total rate of cesarean section was not statistically different between obstetric deliveries in NPIDRs and in CDRs (38.1% vs. 40.0%, p = 0.82, respectively). Regardless of delivery modes, poorer short-term perinatal outcomes were observed in obstetric deliveries in NPIDRs: there were significant higher rates of neonatal respiratory distress (37.8% vs. 10.7%, p < 0.001, respectively), meconium-stained amniotic fluid (22.2% vs. 4.2%, p < 0.001, respectively) and newborn intensive care unit admission (55.6% vs. 8.3%, p < 0.001, respectively) in obstetric deliveries performed in NPIDRs than in CDRs. Maternal surgical outcomes were not significantly different between the two groups of patients. There was no vertical transmission or nosocomial infection observed in COVID-19 confirmed cases in this study period. Conclusions: Our study demonstrates that obstetric deliveries for positive and suspected COVID-19 omicron-variant cases performed in NPIDRs are associated with poorer short-term perinatal outcomes. Reasonable use of personal protective equipment in NPIDRs could effectively prevent nosocomial infection during obstetric deliveries for pregnant women infected with the COVID-19 omicron variant.

Immunomodulating Therapy by Picibanil-based Imiquimod and Virotherapy for Advanced Uterine Cancer after Laparoscopic Surgery.

This is a case report of a uterine cancer with the International Federation of Gynecology and Obstetrics staging 3c2 with the initial clinical presentation of postmenopausal vaginal bleeding in August 2015. Endometrium biopsy showed invasive nests of poorly differentiated grade 3 endometrioid adenocarcinoma. The patient received robotic surgery including total hysterectomy, bilateral salpingo-oophorectomy, bilateral pelvic lymph node dissection, para-aortic lymph node dissection, and washing cytology. The final pathology showed an endometrioid carcinoma with myometrium invasion up to 85% and para-aortic and pelvic lymph nodes invasion. The patient received six courses of adjuvant chemotherapy (paclitaxel and carboplatin) with concurrent chemoradiotherapy after the surgery. Later, immunotherapy with Picibanil (OK-432) and interleukin-2 (IL-2) was given, and cancer did not recur for 34 months until tumor recurrence at the liver dome and bilateral lung was noted by positron-emission tomography scan in July 2018. The patient received laparoscopic surgery for intra-abdominal tumor excision in December 2018, and the tumor found extended to the right diaphragm, liver surface, omentum, bilateral flank to pelvic peritoneum, Douglas pouch, and upper rectum. We continued the immunotherapy with OK-432, IL-2, Aldara cream (imiquimod), and later on, virotherapy (human papillomavirus vaccine). The immune risk profiles showed T-cells' proliferation and alteration of the Th1/Th2 activation after immunotherapy and virotherapy. Proctectomy with colon-anal anastomosis and cytoreduction surgery with hyperthermic intraperitoneal chemotherapy (HIPEC) (doxorubicin and paclitaxel) was performed in January 2019. After the surgery, the patient received chemotherapy (topotecan, paclitaxel, lipodox, and carboplatin) and continued the immunotherapy. The immune risk profiles showed CD4, CD4/CD8 increase after HIPEC and immunotherapy. The patient continued the therapy until May 2020.

Association between intrauterine growth restriction and patent ductus arteriosus: Use of a dichorionic twin pregnancy model.

OBJECTIVE: To evaluate the association between intrauterine growth restriction (IUGR) and the incidence of fetuses with patent ductus arteriosus (PDA) and Hemodynamically significant PDA (Hs-PDA) in dichorionic twins (DC) with selective IUGR. MATERIALS AND METHODS: This is an observational cohort study and retrospective case assessment, involved twins born at Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan between 2013 and 2018. DC twins with selective IUGR (sIUGR) were defined as the presence of a birth weight discordance of >25% and a smaller twin with a birth weight below the tenth percentile. PDA was diagnosed using echocardiography between postnatal day 3 and 7. Hs-PDA was defined as PDA plus increased pulmonary circulation, poor systemic perfusion, cardiomegaly, pulmonary edema, or hypotension requiring pharmacotherapeutic intervention. RESULT: A total of 1187 twins were delivered during the study period, and 53 DC twins with selective IUGR were included in this study. DC twins with PDA have higher rate of preterm birth, lower gestational age of delivery, and lower mean birth weight of both twins compared with DC twins without PDA. In a comparison of the sIUGR twin with the appropriate for gestational age co-twin, both the incidences of PDA (28.30% vs. 7.55%, respectively; P = 0.003) and Hs-PDA (24.53% vs. 5.66%, respectively; P = 0.002) were higher in sIUGR fetuses than in the appropriate for gestational age co-twins. Small gestational age of delivery was the only variable to predict PDA and Hs-PDA [p = 0.002, Odds ratio = 0.57 (0.39-0.82), p = 0.009, Odds ratio = 0.71 (0.55-0.92), respectively]. CONCLUSION: An analysis of dichorionic twins with sIUGR indicated that IUGR increased the risk of PDA and hemodynamically significant PDA.

Factors affecting pregnant women's decisions regarding prenatal pertussis vaccination: A decision-making study in the nationwide Prenatal Pertussis Immunization Program in Taiwan.

OBJECTIVE: To examine the factors affecting pregnant women's decisions to accept or decline the prenatal pertussis (Tdap) vaccination in Taiwan. MATERIALS AND METHODS: We conducted a cross-sectional survey, recruiting pregnant women who had received prenatal care from eight maternity hospitals between January and December 2018. We examined the participants' demographic characteristics, perceptions of pertussis disease risk and vaccination effectiveness, beliefs regarding vaccine information, physician recommendation, and other potential factors affecting decision-making regarding prenatal vaccination. RESULTS: The complete survey response rate among eligible women was 78%. Among the participants, 74% accepted and 26% declined prenatal Tdap vaccination. Most women accepted Tdap during pregnancy because of perceived severity of pertussis in their infants, perceived effectiveness of the prenatal Tdap in preventing neonatal pertussis, and perceived safety of the prenatal Tdap vaccine for the fetus, as well as a provider's recommendation, which was the factor strongly associated with actual Tdap reception. Most of the participants who accepted Tdap vaccination during pregnancy and who believed that the Tdap vaccine could protect their infants from pertussis reported the receiving sufficient information to make an informed decision and trust in the information. By contrast, a large proportion of the participants who declined Tdap and who did not want to experience possible fetal side effects of Tdap reported not getting sufficient information to make an informed decision and a lack of trust in the information. CONCLUSION: Developing a comprehensive strategy involving government policy, the health care system, public media, health professionals, and pregnant women to launch a successful campaign may improve the nationwide acceptance of the prenatal pertussis vaccination.

Combined Immunotherapy (OK-432, IL-2) With Chemotherapy Decrease the Recurrence Rate in Advanced Ovarian Cancer.

OBJECTIVE: In advanced ovarian cancer, traditional therapy included debulking surgery and postoperative chemotherapy. We proposed immunochemotherapy (IMCT) combined with picibanil (OK-432), interleukin-2 (IL-2), and traditional platinum- and taxol-based chemotherapy as a better treatment option for advanced ovarian cancer. METHODS: We retrospectively reviewed the medical records of 51 patients with advanced ovarian cancer between 2007 and 2015 at Chang Gung Memorial Hospital Linkou Medical Center, including 26 patients who were treated with OK-432, IL-2, and platinum- and taxol-based chemotherapy (IMCT group) after debulking surgery; another 25 were treated with traditional platinum- and taxol-based chemotherapy (traditional chemotherapy group) after debulking surgery. We analyzed the difference in age, follow-up period, recurrence rate, and diagnosis-to-recurrence period between the 2 groups. We also analyzed the difference in complete blood cell counts, differentiating counts, and cancer antigen 125 (CA-125) at 1 month after treatment. RESULTS: The recurrence rate between the IMCT and traditional chemotherapy groups showed a significant difference (53.8% vs 88%; P = .0128). The diagnosis-to-recurrence duration was longer in the IMCT than in the traditional chemotherapy groups (33.21 vs 25.63 months), although no statistical significance was found ( P = .4668). In laboratory analysis at 1 month after treatment, the white blood cell, absolute neutrophil, and absolute lymphocyte counts (ALCs) were significantly higher in the IMCT group. On the other hand, CA-125 was significantly lower, and ALC was significantly higher in the nonrecurrence group. CONCLUSIONS: Combined IMCT and chemotherapy have lower recurrence rate compared to traditional chemotherapy after debulking surgery for the treatment of advanced ovarian cancer.

Prenatally diagnosed de novo segmental amplification or deletion by microarray-based comparative genomic hybridization: A retrospective study.

OBJECTIVE: Prenatal diagnosis of de novo segmental amplification or deletion by microarray-based comparative genomic hybridization (array CGH) is uncommon. The study aimed to know about the incidence, abnormal ultrasound findings, and pregnancy outcomes of prenatally diagnosed de novo segmental amplification or deletion by array CGH. MATERIALS AND METHODS: Between January 2014 and December 2017, we analyzed pregnant women who received prenatal array CGH (SurePrint G3 Human CGH Microarray Kit, 8 × 60K) at Chang Gung Memorial Hospital, Taiwan. Clinical data on maternal age, reason for fetal karyotyping, sonographic findings, gestational age at delivery, newborn birth weight, and associated anomalies, if any, were obtained by chart review. RESULTS: A total of 836 specimens (814 amniotic fluid samples, 4 cord blood samples, 18 chorionic villi samples) were analyzed by array CGH during the study period. Of the 56 cases with abnormal array CGH results, 40 had segmental amplification or deletion, 12 had trisomy, three had monosomy, and one had sex chromosome aneuploidy. Of these 40 cases with segmental amplification or deletion, 30 were inherited and 10 were de novo occurrences. The incidence of de novo segmental amplification or deletion was 1.2% (10/836). Abnormal prenatal ultrasound findings occurred in 40% (4/10) of de novo segmental amplification or deletion cases. Among these 10 pregnancies, nine were voluntarily terminated between 22 and 26 weeks of gestation and one was delivered at term. CONCLUSIONS: Prenatal diagnosis of de novo segmental amplification or deletion by array CGH raises important genetic counseling issues. In our series, the incidence of de novo segmental amplification or deletion in prenatal samples was 1.2%. Abnormal prenatal sonographic findings occurred in 40% of these de novo segmental amplification or deletion cases. Of these de novo segmental amplification or deletion pregnancies, 90% were voluntarily terminated.

Functional network analysis of the transcriptomes of mesenchymal stem cells derived from amniotic fluid, amniotic membrane, cord blood, and bone marrow.

Using high-density oligonucleotide microarrays and functional network analyses, we examined whether MSCs derived from four different origins exhibited unique gene expression profiles individually and then compared the gene expression profiles of all MSCs with those of fetal organs. Our results indicated that within each group of MSCs from the same origin, the variability of the gene expression levels was smaller than that between groups of different origins. Functional genomic studies revealed the specific roles of MSCs from different origins. Our results suggest that amniotic fluid MSCs may initiate interactions with the uterus by upregulating oxytocin and thrombin receptors. Amniotic membrane MSCs may play a role in maintaining homeostasis of fluid and electrolytes by regulating the networks of endothelin, neprilysin, bradykinin receptors, and atrial natriuretic peptide. Cord blood MSCs may be involved in innate immune systems as the neonatal defense system against the earliest encountered pathogens. Adult bone marrow MSCs may be an important source not only of all blood lineages but also of bone formation. However, in spite of the different gene expression profiles seen in MSCs derived from different origins, a set of core gene expression profiles was preserved in these four kinds of MSCs. The core signature transcriptomes of all MSCs, when contrasted against those of fetal organs, included genes involved in the regulation of extracellular matrix and adhesion, transforming growth factor-beta receptor signaling, and the Wnt signaling pathways. Disclosure of potential conflicts of interest is found at the end of this article.

Prenatal diagnosis of fetal glutaric aciduria type 1 with rare compound heterozygous mutations in GCDH gene.

OBJECTIVE: Glutaric aciduria type 1 is a rare disease, with the estimated prevalence about 1 in 100,000 newborns. GCDH gene mutation can lead to glutaric acid and 3- OH glutaric acid accumulation, with clinical manifestation of neuronal damage, brain atrophy, microencephalic macrocephaly, decreased coordination of swallowing, poor muscle coordination, spasticity, and severe dystonic movement disorder. CASE REPORT: A 22-year-old female, Gravida 4 Para 2, is pregnancy at 13 weeks of gestational age. Her first child is normal, however, the second child was diagnosed as glutaric aciduria type I after birth. She came to our hospital for prenatal genetic counselling of her fetus at 13 weeks of gestational age. We performed GCDH gene mutation analysis of maternal blood showed IVS 3 + 1 G > A heterozygous mutation, GCDH gene mutation analysis of paternal blood showed c. 1240 G > A heterozygous mutation, and the second child has compound heterozygous IVS 3 + 1 G > A and c. 1240 G > A mutations. Later, we performed amniocentesis at 16 weeks of gestational age for chromosome study and GCDH gene mutation analysis for the fetus. The fetal chromosome study showed normal karyotype, however, GCDH gene mutation analysis showed compound heterozygous IVS 3 + 1 G > A and c. 1240 G > A mutations. The couple decided to termination of pregnancy thereafter. CONCLUSION: Glutaric acidemia type 1 is an autosomal recessive disorder because of pathogenic mutations in the GCDH gene. Early diagnosis and therapy of glutaric acidemia type 1 can reduce the risk of neuronal damage and acute dystonia. We report a case of prenatal diagnosis of fetal glutaric aciduria type 1 with rare compound heterozygous GCDH gene mutation at IVS 3 + 1 G > A and c. 1240 G > A mutations, which provide better genetic counselling for the couples.

Discordance of fetal genotype or phenotype in monozygotic twins: a report of 2 cases.

BACKGROUND: Discordance of fetal genotype or phenotype in a monozygotic twin pregnancy is rare. CASE: In case 1, a 28-year-old woman at 15 weeks' gestation was found to have a dichorionic twin pregnancy with 1 fetus affected with hydrop fetalis. The result of chromosomal study showed that the structurally normal fetus was 46,XY and that the hydropic fetus was 45,X. One week after selective termination of the hydropic fetus at 19 weeks' gestation, the cotwin died in utero. In case 2, a 30-year-old woman at 20 weeks' gestation, was found to have a monochorionic twin pregnancy with 1 fetus presenting with omphalocele. The result of chromosomal study showed that both fetuses were 46,XX. The fetus with omphalocele died in utero at 29 weeks' gestation, and the normal cotwin was delivered later due to fetal distress. Analysis by short tandem repeat markers in both cases indicated that they were monozygotic twins. CONCLUSION: These cases emphasize the importance of zygosity/chorionicity identification in twin pregnancy even though discordance of fetal genotype or phenotype was found. In monozygotic monochorionic twins, the normal cotwin is at risk for an adverse fetal outcome after 1 spontaneous intrauterine fetal death or selective termination. In monozygotic dichorionic twins, the risk of intrauterine fetal demise of the cotwin after selective termination still exists.

Combined ultrasound and magnetic resonance imaging findings on cervical verrucous carcinoma with endometrial invasion: a case report.

BACKGROUND: Cervical verrucous carcinoma is a rare form of cervical cancer. Very few reports present the correlation between diagnostic images and clinicopathologic findings. CASE: A 50-year-old woman was treated with laser ablation for cervical condyloma 6 years prior to her presentation with progressive vaginal bleeding and a foul-smelling discharge at our clinics in August 2004. Biopsy of the cervical mass was compatible with pathologic features of condyloma acuminata. Ultrasonography with color Doppler revealed a 5.9x4.1-cm, hyperechogenic mass with a honeycomb appearance in the lower uterine corpus and hypervascularization of the tumor with resistance indexes ranging from 0.41 to 0.47. Magnetic resonance imaging (MRI) showed that the tumor had a homogeneous intensity on T1-weighted images and heterogeneous intensity on T2-weighted images. After administration of contrast medium, the tumor exhibited a lower signal intensity than did the surrounding cervical stroma. A human papillomavirus test was positive for types 11 and 53. Combined with the clinicopathologic findings, verrucous carcinoma of the cervix, stage Ib2, was suspected and the patient underwent radical hysterectomy and bilateral pelvic lymph node dissection. The final pathology report proved the impression of malignancy. The patient had an uneventful postoperative course, and no disease recurred during 1 year of follow-up. CONCLUSION: The diagnosis of cervical verrucous carcinoma requires a good clinical and pathologic correlation. Nevertheless, detailed imaging studies, such as ultrasound and MRI, as in our case, may provide valuable presurgical information for treatment.

Discordant semilobar holoprosencephaly in monozygotic twins with de novo inv dup(15) marker chromosome and de novo mutation on SHH gene.

We present a 30-year-old woman with a twin pregnancy, 1 fetus displaying a small head circumference, semilobar holoprosencephaly, and cleft lip as detected by ultrasound at 23 weeks of gestation. Fetal magnetic resonance imaging confirmed the diagnosis of semilobar holoprosencephaly. The other twin, however, had an appropriate fetal growth, devoid of any major structural anomalies. Karyotyping by G-banding of amniocentesis specimens in both fetuses showed 47,XY,+mar. Fluorescence in situ hybridization showed in the marker chromosome positive dicentric signals for the chromosome 15 centromere-specific alpha satellite DNA probe (D15Z1) and negative signals for the SNRPN probe (15q11-13), thus establishing a cytogenetic diagnosis of 47,XX,+mar.ish idic(15)(q11-q13)(D15Z1++,SNRPN-) for both fetuses. The parental karyotypes were normal. The fetuses, therefore, had a de novo inv dup(15) marker chromosome without involvement of the Prader-Willi region. Short tandem repeat markers (total 15 markers) confirmed that the fetuses were monozygotic twins. Short tandem repeat markers at the 15q region (total 6 markers) excluded the possibility of uniparental disomy (15) mat or uniparental disomy (15) pat. Molecular study in both fetuses of TGIF, SHH, SIX3, and ZIC2 genes revealed a heterozygous 1085 C > T (Ser 362 Leu) on the SHH gene, but a homozygous 1085 C > C (Ser 362 Ser) for both parents on the SHH gene. The couple decided to terminate the pregnancy at 26 weeks of gestation. To our knowledge, this is the first report of semilobar holoprosencephaly with inv dup(15) marker chromosome and missense SHH gene mutation 1085 C > T (Ser 362 Leu).

Long-term outcome of pregnancy complicating with severe aplastic anemia under supportive care.

OBJECTIVES: Pregnancy associated with aplastic anemia (AA) is a rare and heterogeneous disorder. We aimed to identify and evaluate the maternal and pregnant outcomes of pregnancy-associated severe AA treated with supportive care. MATERIALS AND METHODS: A 25-year retrospective study was conducted at in a single center between 1990 and 2014 with pregnancy associated severe AA. In addition, relevant published cases of antenatally diagnosed pregnancy-associated severe AA after 1990 were identified by PubMed. The main goal was to determine the impact of various risk factors on maternal and fetal outcomes. RESULTS: 15 women with 18 pregnancies were enrolled. With addition of the published reports in literature, a total of 36 cases were included for reference review. Univariate analysis showed that low platelet counts (<2.0 × 109/L), bone marrow hypocellularity (<25%), and late diagnosis during pregnancy were predictors of poor maternal outcomes (P < 0.05). The complication rate of pregnancy outcomes was 53.3%, including preterm delivery, small gestational age (SGA), preterm premature ruptured of membranes (PPROM) and preeclampsia. CONCLUSIONS: This study identified the risk factors of mortality and morbidity in pregnant women with severe AA, as well as the obstetrical complications associated with neonatal outcome.