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https://www.readbyqxmd.com/read/28545044/differentiation-of-spontaneously-contracting-cardiomyocytes-from-non-virally-reprogrammed-human-amniotic-fluid-stem-cells
#1
Aaron J Velasquez-Mao, Christopher J M Tsao, Madeline N Monroe, Xavier Legras, Beatrice Bissig-Choisat, Karl-Dimiter Bissig, Rodrigo Ruano, Jeffrey G Jacot
Congenital heart defects are the most common birth defect. The limiting factor in tissue engineering repair strategies is an autologous source of functional cardiomyocytes. Amniotic fluid contains an ideal cell source for prenatal harvest and use in correction of congenital heart defects. This study aims to investigate the potential of amniotic fluid-derived stem cells (AFSC) to undergo non-viral reprogramming into induced pluripotent stem cells (iPSC) followed by growth-factor-free differentiation into functional cardiomyocytes...
2017: PloS One
https://www.readbyqxmd.com/read/28544599/a-tumor-profile-in-patau-syndrome-trisomy-13
#2
Daniel Satgé, Motoi Nishi, Nicolas Sirvent, Michel Vekemans, Marie-Pierre Chenard, Ann Barnes
Individuals with trisomic conditions like Down syndrome and Edwards syndrome are prone to certain types of malignancy. However, for Patau syndrome (constitutional trisomy 13), which occurs in 1/10,000-1/20,000 live births, the tumor profile has not been well characterized. An awareness of susceptibility to malignancies can improve care of affected individuals, as well as further our understanding of the contribution of trisomy to carcinogenesis. Therefore, we conducted an extensive review of the literature; we found 17 malignancies reported in individuals with Patau syndrome...
May 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28540054/primary-retroperitoneal-mature-cystic-teratoma-dermoid-cyst-in-a-51-year-old-male-case-report-and-historical-literature-review
#3
Andrew Tiu, Vinayak Sovani, Nasir Khan, Shveta Hooda
OBJECTIVES: Primary retroperitoneal mature cystic teratomas are exceedingly uncommon in males aged 50 years and above, and only seven cases have been reported in the literature so far. They usually occur in infants less than 6 months and young females. The aim of this article is to present a rare case of a 51-year-old male with a primary retroperitoneal mature cystic teratoma located in the right infrarenal area adherent to the psoas muscle and to discuss a historical literature review...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28537559/enforcement-of-developmental-lineage-specificity-by-transcription-factor-oct1
#4
Zuolian Shen, Jinsuk Kang, Arvind Shakya, Marcin Tabaka, Elke A Jarboe, Aviv Regev, Dean Tantin
Embryonic stem cells co-express Oct4 and Oct1, a related protein with similar DNA binding specificity. To study the role of Oct1 in ESC pluripotency and transcriptional control, we constructed germline and inducible-conditional Oct1 deficient ESC lines. ESCs lacking Oct1 show normal appearance, self-renewal and growth, but manifest defects upon differentiation. They fail to form beating cardiomyocytes, generate neurons poorly, form small, poorly differentiated teratomas, and cannot generate chimeric mice. Upon RA-mediated differentiation, Oct1 deficient cells induce lineage-appropriate developmentally poised genes poorly while lineage-inappropriate genes, including extra-embryonic genes, are inappropriately expressed...
May 24, 2017: ELife
https://www.readbyqxmd.com/read/28536927/involvement-of-the-dna-mismatch-repair-system-in-cisplatin-sensitivity-of-testicular-germ-cell-tumours
#5
Christiane Rudolph, Cecilie Melau, John E Nielsen, Kristina Vile Jensen, Dekang Liu, Javier Pena-Diaz, Ewa Rajpert-De Meyts, Lene Juel Rasmussen, Anne Jørgensen
BACKGROUND: Testicular germ cell tumours (TGCT) are highly sensitive to cisplatin-based chemotherapy, but patients with tumours containing differentiated teratoma components are less responsive to this treatment. The cisplatin sensitivity in TGCT has previously been linked to the embryonic phenotype in the majority of tumours, although the underlying mechanism largely remains to be elucidated. The aim of this study was to investigate the role of the DNA mismatch repair (MMR) system in the cisplatin sensitivity of TGCT...
May 23, 2017: Cellular Oncology (Dordrecht)
https://www.readbyqxmd.com/read/28530139/sacrococcygeal-teratomas-in-newborns-a-comprehensive-review-for-the-radiologists
#6
Hee Mang Yoon, Sun-Ju Byeon, Jae-Yeon Hwang, Jeong Rye Kim, Ah Young Jung, Jin Seong Lee, Hye-Kyung Yoon, Young Ah Cho
Sacrococcygeal teratomas are the most common solid tumor in newborn infants. The diagnosis is not difficult in many cases; however, there should be additional information on imaging studies in order to manage those infants properly. Details include histology, morphologic classification, complications such as rupture, bleeding, and mass effects on the adjacent structures. Although imaging features cannot accurately predict the histologic subtypes of the tumors, thorough evaluation of the imaging features can help distinguish malignant tumors from benign tumors...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28529132/efficient-selective-removal-of-human-pluripotent-stem-cells-via-ecto-alkaline-phosphatase-mediated-aggregation-of-synthetic-peptides
#7
Yi Kuang, Kenji Miki, Callum J C Parr, Karin Hayashi, Ikue Takei, Jie Li, Mio Iwasaki, Masato Nakagawa, Yoshinori Yoshida, Hirohide Saito
The incomplete differentiation of human induced pluripotent stem cells (iPSCs) poses a serious safety risk owing to their potential tumorigenicity, hindering their clinical application. Here, we explored the potential of phospho-D-peptides as novel iPSC-eliminating agents. Alkaline phosphatases overexpressed on iPSCs dephosphorylate phospho-D-peptides into hydrophobic peptides that aggregate and induce cell death. We isolated a peptide candidate, D-3, that selectively and rapidly induced toxicity in iPSCs within 1 hr but had little influence on various non-iPSCs, including primary hepatocytes and iPSC-derived cardiomyocytes...
May 16, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28528058/metachronous-germ-cell-tumors-of-the-mediastinum
#8
Shuhei Hakiri, Koji Kawaguchi, Takayuki Fukui, Koichi Fukumoto, Shota Nakamura, Kohei Yokoi
We report a rare case of mediastinal nonseminomatous germ cell tumor arising after 2 complete resections of mediastinal mature teratomas 18 and 10 years prior. After three cycles of chemotherapy for the mediastinal nonseminomatous germ cell tumor, the serum α-fetoprotein and β-human chorionic gonadotropin levels were normalized. However, chest radiography revealed that the mediastinal tumor had remarkably increased in size, and thus growing teratoma syndrome was diagnosed. The patient underwent urgent resection of the tumor, and a pathologic examination showed an encapsulated mature teratoma without any malignant viable cells...
June 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28527262/-autoimmune-encephalitis-associated-to-antibodies-against-the-n-methyl-d-aspartate-receptor-report-of-two-cases
#9
José Bustos, Yasmin Sánchez, Jhon Medina, Rommy Olivieri, Julián Mojica, Johan Ortiz
Anti-N-methyl-D-aspartate receptor encephalitis is a neurological syndrome that is more common in young women and is often associated with ovarian teratoma. It is characterized by acute general unspecific symptoms that evolve to neurological deterioration, psychosis and seizures. In its more advanced stage it is associated with abnormal movements and dysautonomia.We report two cases in women of 23 and 12 years of age. Given its low incidence, we present the clinical exercise that led to their diagnoses and the treatment options employed...
April 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28523263/a-rare-case-of-an-autoamputated-ovary-with-mature-cystic-teratoma
#10
Hwi Gon Kim, Yong Jung Song, Yong Jin Na, Juseok Yang, Ook Hwan Choi
Autoamputated ovary with mature cystic teratoma (MCT) is a rarely reported gynecologic entity with an unknown prevalence. A 34-year-old woman referred to our clinic for presumed left ovarian tumor. Pelvic examination, ultrasonography and computed tomography scan revealed a 5-cm, cystic ovarian mass with calcification and fat component, and tumor markers were as follows, cancer antigen (CA) 125; 10.4 U/mL, CA19-9; 2 U/mL. Laparoscopy was performed. The mass was identified in the left adnexal region without any ligamentous or direct connection with the pelvic organs...
April 2017: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/28521633/cd30-expression-in-pediatric-neoplasms-study-of-585-cases
#11
Jinjun Cheng, Haiqing Zhu, John Kim Choi
CD30 is a member of the tumor necrosis factor receptor superfamily, member 8 (TNFRSF8), and its normal expression is restricted to activated T and B cells. In tumor cells, CD30 expression is most commonly associated with lymphoid malignancies (Hodgkin and non-Hodgkin lymphomas) and is a therapeutic target using anti-CD30 antibody. CD30 expression has been reported also in mostly adult non-lymphoid malignancies, raising the possibility of CD30-targeted therapy for additional tumors. In this study, we examined the incidence of CD30 expression in 251 hematopoietic and 334 non-hematopoietic cases of pediatric tumors...
June 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28521629/pediatric-intraocular-immature-teratoma-associated-with-sacrococcygeal-teratoma
#12
Kristen E Zhelnin, Grant M Gebhard, David M Mirsky, Scott Cn Oliver, Mark A Lovell, Csaba Galambos, Timothy M Crombleholme, Emily A McCourt
Intraocular teratomas are rare neoplasms with only three previously reported cases. We present the fourth case of intraocular teratoma and the second associated with sacrococcygeal teratoma. While the nature of the association between intraocular teratomas and sacrococcygeal teratomas is unclear, it suggests a need for careful ophthalmologic follow-up of infants with congenital sacrococcygeal teratomas.
June 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28520571/is-omentectomy-mandatory-among-early-stage-i-ii-malignant-ovarian-germ-cell-tumor-patients-a-retrospective-study-of-223-cases
#13
Wenyan Xu, Yanfang Li
OBJECTIVE: The aim of the study was to investigate whether omentectomy (OMT) is necessary in the operation for apparently early stage malignant ovarian germ cell tumors (MOGCTs). METHODS AND MATERIALS: Searching medical records database of Sun Yat-sen University Cancer Center from January 1, 1966, to November 30, 2015, patients with MOGCTs were identified and their age, year of diagnosis, tumor grade, histologic subtype, International Federation of Gynecology and Obstetrics stage, nodal findings, gross observation of omentum, and performance of OMT were assessed...
May 18, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28507642/diagnostic-imaging-of-pregnant-women-the-role-of-magnetic-resonance-imaging
#14
Monika Bekiesińska-Figatowska, Anna Romaniuk-Doroszewska, Sylwia Szkudlińska-Pawlak, Agnieszka Duczkowska, Jarosław Mądzik, Martyna Szopa-Krupińska, Tomasz M Maciejewski
BACKGROUND: Presentation of magnetic resonance imaging (MRI) findings in pregnant women in the Department of Diagnostic Imaging, Institute of Mother and Child, Warsaw, Poland. MATERIAL/METHODS: Forty-three symptomatic pregnant women underwent MRI between 9 and 33 weeks of gestation (mean of 23 weeks). Moreover, we included 2 pregnant women who underwent fetal MRI and had incidental abnormalities. RESULTS: In 9 cases, we excluded the suspected brain abnormalities...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28507579/assessment-of-concentrations-of-strail-ligand-and-its-receptors-strail-r1-and-strail-r2-markers-monitoring-the-course-of-the-extrinsic-pathway-of-apoptosis-induction-potential-application-in-ovarian-cancer-diagnostics
#15
Aleksandra Mielczarek-Palacz, Justyna Sikora, Zdzisława Kondera-Anasz
INTRODUCTION: TNF-related apoptosis-inducing ligand (TRAIL) together with its receptors are involved in activation of the extrinsic pathway of apoptosis. Due to the special role of the apoptosis pathway in pathogenesis of ovarian cancers, the aim of the study was to assess concentrations of sTRAIL, sTRAIL-R1 and sTRAIL-R2 in serum of affected women. MATERIAL AND METHODS: The study group included 85 women with diagnosed ovarian tumors: 35 women with ovarian serous cystadenoma, 15 women with ovarian teratoma and 35 women with serous cystadenocarcinoma...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28506950/fertility-sparing-approach-as-the-standard-of-care-in-young-patients-with-immature-teratomas
#16
Christos Iavazzo, George Vorgias, Paraskevi Evangelia Iavazzo, Ioannis D Gkegkes
Immature teratomas are quite rare tumors arising in young women. They are usually diagnosed in early stage and grade and have a good prognosis. In these young patients, fertility-sparing management is suggested as the standard of care. Bilateral immature teratoma is a rare condition with an incidence of 10%, with a five-year survival rate of 80%. The majority of patients received fertility-sparing treatment followed by adjuvant chemotherapy in 78%. Older age, advanced stage, and high grade are negative prognostic factors...
March 15, 2017: Journal of the Turkish German Gynecological Association
https://www.readbyqxmd.com/read/28506050/-a-clinicopathologic-study-of-6-patients-with-histologically-pure-seminoma-but-elevated-serum-alpha-fetoprotein
#17
Shuya Kandori, Koji Kawai, Ken Tanaka, Takashi Kawahara, Atsushi Ikeda, Ryutaro Ishitsuka, Tomokazu Kimura, Takahiro Kojima, Akira Joraku, Jun Miyazaki, Hiroyuki Nishiyama
Histologically pure seminoma with elevated alpha-fetoprotein (AFP), so-called AFP-positive seminoma, is rare. It is recommended that patients with AFP-positive seminoma be managed as non-seminoma, but the clinical features and prognosis of this disease are not fully understood. In this study, we retrospectively analyzed 6 cases of metastatic AFP-positive seminoma at Tsukuba University Hospital (TUH). AFP was elevated before induction chemotherapy in 4 patients with an average of 1,372 ng/ml. In the remaining 2 patients, AFP became elevated during or after induction chemotherapy...
April 2017: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/28501423/teratoma-of-the-nervous-system-a-case-series
#18
Hussein Algahtani, Bader Shirah, Ahad Abdullah, Abdulrahman Bazaid
Teratoma is a common form of germ cell tumors composed of multiple tissues foreign to the site in which arise with a histological representation of all three germ cell layers. Intracranial teratomas are very rare. In this study, we report three cases of intracranial teratomas with an interesting clinical course, neuroradiology, and outcome. In addition, we review the literature and convey important messages to the neuroscience community regarding issues related to the management of these rare tumors. The present cases are interesting examples of intracranial teratoma in terms of location of the tumor and neuroimaging findings...
May 10, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28498811/the-generation-and-functional-characterization-of-induced-pluripotent-stem-cells-from-human-intervertebral-disc-nucleus-pulposus-cells
#19
Yanxia Zhu, Yuhong Liang, Hongxia Zhu, Cuihong Lian, Liang Wang, Yiwei Wang, Hongsheng Gu, Guangqian Zhou, Xiaoping Yu
Disc degenerative disease (DDD) is believed to originate in the nucleus pulposus (NP) region therefore, it is important to obtain a greater number of active NP cells for the study and therapy of DDD. Human induced pluripotent stem cells (iPSCs) are a powerful tool for modeling the development of DDD in humans, and have the potential to be applied in regenerative medicine. NP cells were isolated from DDD patients following our improved method, and then the primary NP cells were reprogramed into iPSCs with Sendai virus vectors encoding 4 factors...
April 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28494940/differentiation-defective-human-induced-pluripotent-stem-cells-reveal%C3%A2-strengths-and-limitations-of-the-teratoma-assay-and-in%C3%A2-vitro-pluripotency-assays
#20
Marga J Bouma, Maarten van Iterson, Bart Janssen, Christine L Mummery, Daniela C F Salvatori, Christian Freund
The ability to form teratomas in vivo containing multiple somatic cell types is regarded as functional evidence of pluripotency for human pluripotent stem cells (hPSCs). Since the Teratoma assay is animal dependent, laborious, and only qualitative, the PluriTest and the hPSC ScoreCard assay have been developed as in vitro alternatives. Here we compared normal hPSCs, induced hPSCs (hiPSCs) with reactivated reprogramming transgenes, and human embryonal carcinoma cells (hECs) in these assays. While normal hPSCs gave rise to typical teratomas, the xenografts of the hECs and the hiPSCs with reactivated reprogramming transgenes were largely undifferentiated and malignant...
May 9, 2017: Stem Cell Reports
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