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https://www.readbyqxmd.com/read/28103575/piwil2-transfected-human-fibroblasts-are-cancer-stem-cell-like-and-genetically-unstable
#1
Deying Zhang, Xin Wu, Xing Liu, Chunhong Cai, Guangping Zeng, Jan Rohozinski, Yuanyuan Zhang, Guanghui Wei, Dawei He
Uncontrolled cell proliferation and inhibition of apoptosis are considered to be vital for cancer initiation, maintenance, infiltration, metastasis and recurrence after anti-cancer therapy. Here we report the generation of a novel cell line by reprogramming child foreskin fibroblast with the full length apoptosis inhibitor gene PIWIL2. The fibroblasts transfected with PIWIL2 expressed the stem cell markers OCT-4, NANOG, SOX-2, KLF-4 and C-MYC; endoderm marker AFP and GATA6; mesoderm markers ACTA2 and BRACHYURY; and ectoderm markers NESTIN and TUBB3...
January 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28102527/teratoma-of-the-sellar-region-a-case-report
#2
Wolfgang Saeger, Azadeh Ebrahimi, Rudi Beschorner, Hildegard Spital, Jürgen Honegger, Waldemar Wilczak
The case report describes a teratoma of the sellar region with a gland forming and an immature, relatively clear undifferentiated component without signs of anaplasia. Both components express TTF-1 indicating their presumable origin in the neurohypophysis as part of the circumventricular organs. The differential diagnosis includes pituitary adenoma and spindle cell oncocytoma with inclusion of Rathke's cleft cyst, pituitary blastoma, yolk sac tumor, and other germ cell tumors. The prognosis is the same as in the immature teratomas in the gonads, specifically unclear...
January 19, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28091891/adrenal-teratoma-a-case-series-and-review-of-the-literature
#3
Eric J Kuo, Anthony E Sisk, Zhiming Yang, Jiaoti Huang, Michael W Yeh, Masha J Livhits
Adrenal teratomas are rare neoplasms and there is limited data on their surgical outcomes and long-term prognosis. We aimed to review our institutional experience and compare this to the existing literature on adrenal teratomas in adults and children. An institutional pathology database was searched for cases of adrenal teratoma (June 1956-July 2016). Clinical and imaging data were abstracted from the medical records and pathology slides were obtained for review. In addition, a PubMed search for "adrenal teratoma" from June 1952 to July 2016 was performed to identify reports of primary adrenal teratoma in patients of all ages...
January 14, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28091817/teratomas-of-the-cranial-vault-a-systematic-analysis-of-clinical-outcomes-stratified-by-histopathological-subtypes
#4
Carlito Lagman, Timothy T Bui, Brittany L Voth, Lawrance K Chung, David J Seo, Courtney Duong, Mark R Libowitz, Naomi E Walker, Daniel T Nagasawa, Isaac Yang
BACKGROUND: Teratomas of the cranial vault are divided into histopathological subtypes and grouped by prognoses: mature (good prognosis), mixed/malignant and immature teratomas (intermediate prognosis). This schema also includes non-teratomatous tumors. The authors of this study sought to elucidate histologically dependent predictors of survival and further clarify the classification system of intracranial teratomas. METHODS: We performed a systematic analysis of the published literature to identify studies describing patients with intracranial teratomas diagnosed with magnetic resonance imaging (MRI) and presenting definite information on histologies, therapies, and outcomes at a minimum follow-up of 2 years...
January 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28090031/differentiation-behavior-of-ips-cells-cultured-on-plga-with-osteoinduction-medium
#5
Reiko Tokita, Kei Nakajima, Kenji Inoue, Akram Al-Wahabi, Tungalag Ser-Od, Kenichi Matsuzaka, Takashi Inoue
In the present report, we have generated osteoblast-like cells derived from mouse induced-pluripotent stem (iPS) cells on PLGA with osteoinduction medium in vitro and in vivo. The cell culture period was 2 weeks. At 2 weeks, mRNA level of type I collagen was significantly higher than at 1 week. Osteocalcin mRNA level at 2 weeks was tendency to increase compared with at 1 week. And the cells cultured on PLGA were positive for immunofluorescent staining of osteocalcin and alizarin red S staining. The scaffold and osteogenic-like cells induced in vitro were implanted subcutaneously into SCID mice...
January 13, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28087635/rb-controls-growth-survival-and-neuronal-migration-in-human-cerebral-organoids
#6
Takeshi Matsui, Vanesa Nieto-Estévez, Sergii Kyrychenko, Jay W Schneider, Jenny Hsieh
Retinoblastoma (RB) is a tumor suppressor gene which regulates cell cycle entry to S phase via E2F transcription factors. Using knockout (KO) mice, it has been described that Rb plays a role in cell migration and differentiation in developing and adult brain as well as apoptosis. In addition, the RB family is required for the self-renewal and survival of human embryonic stem cells (ESCs). However, little is known about the role of this gene in human brain development. Here, we investigated the role of RB in cerebral organoids from human ESCs deficient for RB...
January 13, 2017: Development
https://www.readbyqxmd.com/read/28074006/autocrine-wnt-regulates-the-survival-and-genomic-stability-of-embryonic-stem-cells
#7
Iris Augustin, Dyah L Dewi, Jennifer Hundshammer, Gerrit Erdmann, Grainne Kerr, Michael Boutros
Wnt signaling plays an important role in the self-renewal and differentiation of stem cells. The secretion of Wnt ligands requires Evi (also known as Wls). Genetically ablating Evi provides an experimental approach to studying the consequence of depleting all redundant Wnt proteins, and overexpressing Evi enables a nonspecific means of increasing Wnt signaling. We generated Evi-deficient and Evi-overexpressing mouse embryonic stem cells (ESCs) to analyze the role of autocrine Wnt production in self-renewal and differentiation...
January 10, 2017: Science Signaling
https://www.readbyqxmd.com/read/28073871/benign-cystic-mediastinal-teratoma-presenting-as-a-massive-pleural-effusion-in-a-17-year-old-boy
#8
Annalisa Montebello, Adrian Mizzi, Paul John Cassar, Karen Cassar
Mediastinal teratomas are a rare, albeit an important differential diagnosis of anterior/middle mediastinal masses in young adults and various atypical presentations have been reported. The authors report a case of a 17-year-old boy who presented with a 2-month history of worsening shortness of breath and pleuritic chest pain. A massive left-sided pleural fluid collection was seen on a chest radiograph (CXR). The pleural fluid was drained and a CT Thorax confirmed the presence of a cystic mass. Following re-accumulation of the fluid, thoracotomy was performed and a benign mediastinal teratoma excised...
January 10, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28071703/mammary-extracellular-matrix-directs-differentiation-of-testicular-and-embryonic-stem-cells-to-form-functional-mammary-glands-in-vivo
#9
Robert D Bruno, Jodie M Fleming, Andrea L George, Corinne A Boulanger, Pepper Schedin, Gilbert H Smith
Previously, we demonstrated the ability of the normal mammary microenvironment (niche) to direct non-mammary cells including testicular and embryonic stem cells (ESCs) to adopt a mammary epithelial cell (MEC) fate. These studies relied upon the interaction of transplanted normal MECs with non-mammary cells within the mammary fat-pads of recipient mice that had their endogenous epithelium removed. Here, we tested whether acellular mammary extracellular matrix (mECM) preparations are sufficient to direct differentiation of testicular-derived cells and ESCs to form functional mammary epithelial trees in vivo...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28071630/ovarian-tumors-in-children-10-year-experience-from-a-tertiary-care-center-in-south-india
#10
B Rajeswari, M Nair, A Ninan, K Parukuttyamma
BACKGROUND: Ovarian tumors are uncommon in childhood and constitute around 1% of childhood malignancies. Two thirds of pediatric ovarian tumors are germ cell tumors. Epithelial ovarian tumors and stromal tumors are less frequent. We share our experience in childhood ovarian cancers, analyzing a series of cases with respect to the clinical profile, treatment and survival. METHODS: All newly diagnosed ovarian tumors in children up to 14 years of age, registered in our Pediatric Oncology Division between January 2000 and December 2009 were retrospectively reviewed...
April 2016: Indian Journal of Cancer
https://www.readbyqxmd.com/read/28070859/mouse-bone-marrow-vsels-exhibit-differentiation-into-three-embryonic-germ-lineages-and-germ-hematopoietic-cells-in-culture
#11
Ambreen Shaikh, Sandhya Anand, Sona Kapoor, Ranita Ganguly, Deepa Bhartiya
Very small embryonic-like stem cells (VSELs) have been reported in various adult tissues, express pluripotent and primordial germ cells (PGCs) specific markers, are mobilized under stress/disease conditions, give rise to tissue committed progenitors and thus help regenerate and maintain homeostasis. The aim of the present study was to evaluate in vitro differentiation potential of VSELs using a quantitative approach. VSELs were collected from mouse bone marrow after 4 days of 5-fluorouracil (5-FU, 150 mg/Kg) treatment, further enriched by size based filtration and cultured on a feeder support in the presence of specific differentiation media...
January 9, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28070654/anesthesia-management-of-cesarean-section-in-parturient-with-anti-n-methyl-d-aspartate-receptor-encephalitis-a-case-report
#12
Zhimin Liao, Xiaoqin Jiang, Juan Ni
A 24-year-old woman at 29 weeks' gestation, and with psychiatric symptoms, was admitted to hospital and diagnosed as having anti-N-methyl-D-aspartate receptor encephalitis. After 4 weeks of immunotherapy with little effect, an emergency cesarean section was performed at 33(+4) weeks gestation under general anesthesia. The parturient was intubated after rapid sequence induction with etomidate, remifentanil and succinylcholine. Anesthesia was maintained with sevoflurane and remifentanil. Except for low weight, the infant was normal at birth...
January 9, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28069364/compact-mri-for-the-detection-of-teratoma-development-following-intrathecal-human-embryonic-stem-cell-injection-in-nod-scid-mice
#13
Yuval Ramot, Yael S Schiffenbauer, Netanel Amouyal, Nathan Ezov, Michal Steiner, Michal Izrael, Neta Lavon, Arik Hasson, Michel Revel, Abraham Nyska
Stem cells are emerging as a promising new treatment modality for a variety of central nervous system disorders. However, their use is hampered by the potential for the development of teratomas and other tumors. Therefore, there is a crucial need for the development of methods for detecting teratomas in preclinical safety studies. The aim of the current study is to assess the ability of a compact Magnetic Resonance Imaging (MRI) system to detect teratoma formation in mice. Five NOD-SCID mice were injected intrathecally with human embryonic stem cells (hESCs), with two mice serving as controls...
January 6, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28061867/lower-abdominal-gossypiboma-mimics-ovarian-teratoma-a-case-report-and-review-of-the-literature
#14
Hao Zhang, Yanyong Jiang, Qingqing Wang, Jun Liu
BACKGROUND: Gossypiboma is a serious and potentially dangerous medico-legal problem. CASE PRESENTATION: We present a case of lower abdominal gossypiboma that presented as an abdominal cystic mass mimicking ovarian teratoma. The mass and the adhesive intestine loop were en blocly resected. The cut section confirmed gossypiboma diagnosis. CONCLUSIONS: The present experience and related literature results indicate that gossypiboma should always be kept in mind for the differential diagnosis of cystic soft-tissue mass detected in patients with a prior operation history despite its rarity and diagnosis difficulty...
January 6, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28052023/spermatogonial-stem-cells-and-progenitors-are-refractory-to-reprogramming-to-pluripotency-by-the-transcription-factors-oct3-4-c-myc-sox2-and-klf4
#15
Sébastien Corbineau, Bruno Lassalle, Maelle Givelet, Inès Souissi-Sarahoui, Virginie Firlej, Paul Henri Romeo, Isabelle Allemand, Lydia Riou, Pierre Fouchet
The male germinal lineage, which is defined as unipotent, produces sperm through spermatogenesis. However, embryonic primordial germ cells and postnatal spermatogonial stem cells (SSCs) can change their fate and convert to pluripotency in culture when they are not controlled by the testicular microenvironment. The mechanisms underlying these reprogramming processes are poorly understood. Testicular germ cell tumors, including teratoma, share some molecular characteristics with pluripotent cells, suggesting that cancer could result from an abnormal differentiation of primordial germ cells or from an abnormal conversion of SCCs to pluripotency in the testis...
December 28, 2016: Oncotarget
https://www.readbyqxmd.com/read/28050596/an-ovarian-mature-cystic-teratoma-evolving-in-squamous-cell-carcinoma-a-case-report-and-review-of-the-literature
#16
REVIEW
C Goudeli, A Varytimiadi, N Koufopoulos, J Syrios, E Terzakis
Mature cystic teratomas (MCT), also known as dermoid cysts, are the most common ovarian germ cell tumors and the most common ovarian neoplasms in patients younger than 20 years. Malignant transformation (MT) is a rare complication of MCTs which may occur in 1-2% of the cases. Squamous cell carcinoma (SCC) is the most frequent histology arising from MCTs and its appearance depends on diverse risk factors such as patient's age, the size of the tumor and levels of serum tumor markers. Diagnosis and treatment constitute a big challenge due to the rarity and the aggressive course of this entity...
February 2017: Gynecologic Oncology Reports
https://www.readbyqxmd.com/read/28049783/derivation-and-culture-of-epiblast-stem-cell-episc-lines
#17
Peter Rugg-Gunn
This protocol describes the derivation and culture of epiblast stem cells (EpiSCs) from early postimplantation epiblasts. EpiSCs can be maintained in an undifferentiated state and retain the ability to generate tissues from all three germ layers in vitro and to form teratomas in vivo. However, they seem unable to form chimeras. Whether this is due to differences in developmental status or a cellular incompatibility (e.g., cell adhesion) between EpiSCs and the host inner cell mass (ICM) is currently unclear...
January 3, 2017: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/28045072/induced-pluripotent-stem-cell-generation-from-a-man-carrying-a-complex-chromosomal-rearrangement-as-a-genetic-model-for-infertility-studies
#18
Aurélie Mouka, Vincent Izard, Gérard Tachdjian, Sophie Brisset, Frank Yates, Anne Mayeur, Loïc Drévillon, Rafika Jarray, Philippe Leboulch, Leila Maouche-Chrétien, Lucie Tosca
Despite progress in human reproductive biology, the cause of male infertility often remains unknown, due to the lack of appropriate and convenient in vitro models of meiosis. Induced pluripotent stem cells (iPSCs) derived from the cells of infertile patients could provide a gold standard model for generating primordial germ cells and studying their development and the process of spermatogenesis. We report the characterization of a complex chromosomal rearrangement (CCR) in an azoospermic patient, and the successful generation of specific-iPSCs from PBMC-derived erythroblasts...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28044390/systematic-in-vitro-and-in-vivo-characterization-of-leukemia-inhibiting-factor-and-fibroblast-growth-factor-derived-porcine-induced-pluripotent-stem-cells
#19
Jan O Secher, Ahmet Ceylan, Gianluca Mazzoni, Kaveh Mashayekhi, Tong Li, Suchitra Muenthaisong, Troels T Nielsen, Dong Li, Shengting Li, Stoyan Petkov, Susanna Cirera, Yonglun Luo, Lori Thombs, Haja N Kadarmideen, Andras Dinnyes, Lars Bolund, Bernard A J Roelen, Mette Schmidt, Henrik Callesen, Poul Hyttel, Kristine K Freude
Derivation and stable maintenance of porcine induced pluripotent stem cells (piPSCs) is challenging. We herein systematically analyzed two piPSC lines, derived by lentiviral transduction and cultured under either leukemia inhibitory factor (LIF) or fibroblast growth factor (FGF) conditions, to shed more light on the underlying biological mechanisms of porcine pluripotency. LIF-derived piPSCs were more successful than their FGF-derived counterparts in the generation of in vitro chimeras and in teratoma formation...
January 3, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28043830/fetal-primary-cardiac-tumors-during-perinatal-period
#20
REVIEW
Shi-Min Yuan
Fetal primary cardiac tumors are rare, but they may cause complications, which are sometimes life threatening, including arrhythmias, hydrops fetalis, ventricular outflow/inflow obstruction, cardiac failure, and even sudden death. Among fetal primary cardiac tumors, rhabdomyomas are most common, followed by teratomas, fibromas, hemangiomas, and myxomas. Everolimus, a mammalian target of rapamycin inhibitor, has been reported to be an effective drug to cause tumor remission in three neonates with multiple cardiac rhabdomyomas...
October 28, 2016: Pediatrics and Neonatology
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