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https://www.readbyqxmd.com/read/28803914/targeted-disruption-of-tcf12-reveals-heb-as-essential-in-human-mesodermal-specification-and-hematopoiesis
#1
Yang Li, Patrick M Brauer, Jastaranpreet Singh, Sintia Xhiku, Kogulan Yoganathan, Juan Carlos Zúñiga-Pflücker, Michele K Anderson
Hematopoietic stem cells arise from mesoderm-derived hemogenic endothelium (HE) during embryogenesis in a process termed endothelial-hematopoietic transition (EHT). To better understand the gene networks that control this process, we investigated the role of the transcription factor HEB (TCF12) by disrupting the TCF12 gene locus in human embryonic stem cells (hESCs) and inducing them to differentiate toward hematopoietic outcomes. HEB-deficient hESCs retained key features of pluripotency, including expression of SOX2 and SSEA-4 and teratoma formation, while NANOG expression was reduced...
August 2, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28800880/radioactive-iodine-131-i-uptake-in-an-ovarian-teratoma
#2
M Oporto, N Orta, F Cepa, M Pons, M Cabrer, C Peña
No abstract text is available yet for this article.
August 8, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28798778/tumorigenic-and-differentiation-potentials-of-embryonic-stem-cells-depend-on-tgf%C3%AE-family-signaling-lessons-from-teratocarcinoma-cells-stimulated-to-differentiate-with-retinoic-acid
#3
Olga Gordeeva, Sergey Khaydukov
A significant challenge for the development of safe pluripotent stem cell-based therapies is the incomplete in vitro differentiation of the pluripotent stem cells and the presence of residual undifferentiated cells initiating teratoma development after transplantation in recipients. To understand the mechanisms of incomplete differentiation, a comparative study of retinoic acid-induced differentiation of mouse embryonic stem (ES) and teratocarcinoma (EC) cells was conducted. The present study identified differences in proliferative activity, differentiation, and tumorigenic potentials between ES and EC cells...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28796340/application-of-differentiated-human-tonsil-derived-stem-cells-to-trembler-j-mice
#4
Saeyoung Park, Yoonyoung Choi, Geon Kwak, Young Bin Hong, Namhee Jung, Jieun Kim, Byung-Ok Choi, Sung-Chul Jung
INTRODUCTION: Mesenchymal stem cells (MSCs) can differentiate into various cell types. METHODS: We investigated the potential of human tonsil-derived MSCs (T-MSCs) for neuromuscular regeneration in trembler-J (Tr-J) mice: a model for Charcot-Marie-Tooth disease type 1A (CMT1A. RESULTS: T-MSCs differentiated toward skeletal myocytes with increased expression of skeletal muscle-related markers (including troponin I type 1, and myogenin), and the formation of myotubes in vitro...
August 10, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28794967/pleural-effusion-as-a-rare-manifestation-of-mediastinal-teratoma-a-case-report
#5
Ebrahim Razi, Aida Imani, Iman Ansari, Tehereh Khamechian, Abdolhossein Davoodabadi
Pleural effusion as one of the most common manifestations of pulmonary diseases is a rare symptom of anterior mediastinal teratoma that might mislead general physicians. In this study we report a rare case of pleural effusion and anterior mediastinal teratoma accompanying each other. The patient was a 21-year-old woman who suffered from dyspnea, cough, fever and manifestations of pleural effusion were obvious in chest X Ray (CXR). Computed tomography scan showed a cystic mass with lipid component. After thoracotomy, a mass was taken out from medial lobe of right lung and the results of pathology showed the mature mediastinal teratoma...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28792249/induced-neural-stem-cells-as-a-means-of-treatment-in-huntington-s-disease
#6
Kyung-Ah Choi, Sunghoi Hong
Huntington's disease (HD) is an inherited neurodegenerative disease characterized by chorea, dementia, and depression caused by progressive nerve cell degeneration, which is triggered by expanded CAG repeats in the huntingtin (Htt) gene. Currently, there is no cure for this disease, nor is there an effective medicine available to delay or improve the physical, mental, and behavioral severities caused by it. Areas covered: In this review, the authors describe the use of induced neural stem cells (iNSCs) by direct conversion technology, which offers great advantages as a therapeutic cell type to treat HD...
August 9, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28790329/kdm4b-mediated-reduction-of-h3k9me3-and-h3k36me3-levels-improves-somatic-cell-reprogramming-into-pluripotency
#7
Jingwei Wei, Jisha Antony, Fanli Meng, Paul MacLean, Rebekah Rhind, Götz Laible, Björn Oback
Correct reprogramming of epigenetic marks is essential for somatic cells to regain pluripotency. Repressive histone (H) lysine (K) methylation marks are known to be stable and difficult to reprogram. In this study, we generated transgenic mice and mouse embryonic fibroblasts (MEFs) for the inducible expression of KDM4B, a demethylase that removes H3 K9 and H3K36 trimethylation (me3) marks (H3K9/36me3). Upon inducing Kdm4b, H3K9/36me3 levels significantly decreased compared to non-induced controls. Concurrently, H3K9me1 levels significantly increased, while H3K9me2 and H3K27me3 remained unchanged...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28777098/carcinoid-arising-from-the-teratomatous-bronchial-mucosa-in-a-mature-cystic-teratoma-of-the-ovary-a-case-report
#8
Dongfeng Niu, Zhongwu Li, Li Sun, Dengfeng Cao
Primary ovarian carcinoids are relatively uncommon, either pure (monodermal teratomas) or in association with mature cystic teratomas. Here we reported a unique case of carcinoid arising from the teratomatous bronchial mucosa in an ovarian mature cystic teratoma in a 22-year-old woman. This tumor showed compact trabecular and nested growth pattern with salt-and-pepper chromatin pattern. Mitotic figures were identified (6/10 high power fields) and focal necrosis was present. Immunohistochemically the tumor cells were diffusely positive for TTF1 and CD56, focally positive for synaptophysin, and negative for chromogranin A and CDX2...
August 2, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28770374/mog-antibody-related-disorders-common-features-and-uncommon-presentations
#9
Álvaro Cobo-Calvo, Anne Ruiz, Hyacintha D'Indy, Anne-Lise Poulat, Maryline Carneiro, Nicolas Philippe, Françoise Durand-Dubief, Kumaran Deiva, Sandra Vukusic, Vincent Desportes, Romain Marignier
Myelin oligodendrocyte glycoprotein antibodies (MOG-Ab) have been reported in acute demyelinating encephalomyelitis (ADEM), optic neuritis (ON), and neuromyelitis optica spectrum disorders (NMOSD) in adults and pediatrics. We aimed to delineate the common features of MOG-Ab-related disorders in children and adults, and report uncommon presentations. Twenty-seven consecutive pediatric and adult patients testing positive for MOG-Ab, with a minimum follow-up of 6 months, were included. Comprehensive epidemiological, clinical, radiological, and laboratory data were retrospectively analyzed...
August 2, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28770139/retroperitoneal-immature-teratoma-in-a-neonate
#10
Chiranjiv Kumar, Rajpal Singh Sisodiya, Shasanka Shekhar Panda, Yogesh Kumar Sarin
We report a rare case of large immature retroperitoneal teratoma in a neonate. The diagnostic and therapeutic challenges of dealing with such a case have been discussed and the relevant literature reviewed.
April 2017: Journal of Neonatal Surgery
https://www.readbyqxmd.com/read/28770134/successful-postnatal-management-of-ruptured-giant-sacrococcygeal-teratoma
#11
Muataz A Alani
Most sacrococcygeal teratomas present between the 22nd and the 34th week of gestation. The diagnosis of sacrococcygeal teratoma on routine antenatal sonograms is associated with a greater than expected incidence of prenatal and perinatal complications. We report a premature baby with intrauterine spontaneous rupture of giant sacrococcygeal teratoma which was managed successfully.
April 2017: Journal of Neonatal Surgery
https://www.readbyqxmd.com/read/28766574/a-cystic-teratoma-mimicking-a-hydatid-cyst
#12
Ryan S Cho, Jeremy Walker, John Gancayco
No abstract text is available yet for this article.
August 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28763631/an-ultra-effective-method-of-generating-extramultipotent-cells-from-human-fibroblasts-by-ultrasound
#13
Yong Seung Lee, Hyejung Heo, Jonghwan Lee, Sung Ung Moon, Woon Yong Jung, Yong Keun Park, Min Geun Park, Seung-Hun Oh, Soonhag Kim
Multipotent cells have similar basic features of all stem cells but limitation in ability of self-renewal and differentiation compared with pluripotent cells. Here, we have developed an ultra effective, gene- and chemical-free method of generating extra multipotent (xpotent) cells which have differentiation potential more than limited cell types, by the mechanism of ultrasound-directed permeation of environmental transition-guided cellular reprogramming (Entr). Ultrasound stimulus generated a massive number of Entr-mediated xpotent (x/Entr) spheroids from human dermal fibroblasts (HDFs) 6 days after treatment...
July 25, 2017: Biomaterials
https://www.readbyqxmd.com/read/28763191/nanoporous-immunoprotective-device-for-stem-cell-derived-%C3%AE-cell-replacement-therapy
#14
Ryan Chang, Gaetano Faleo, Holger A Russ, Audrey V Parent, Susanna K Elledge, Daniel A Bernards, Jessica L Allen, Karina Villanueva, Matthias Hebrok, Qizhi Tang, Tejal A Desai
Encapsulation of human embryonic stem-cell-differentiated beta cell clusters (hES-βC) holds great promise for cell replacement therapy for the treatment of diabetics without the need for chronic systemic immune suppression. Here, we demonstrate a nanoporous immunoprotective polymer thin film cell encapsulation device that can exclude immune molecules while allowing exchange of oxygen and nutrients necessary for in vitro and in vivo stem cell viability and function. Biocompatibility studies show the device promotes neovascular formation with limited foreign body response in vivo...
August 7, 2017: ACS Nano
https://www.readbyqxmd.com/read/28760579/survival-of-ipsc-derived-grafts-within-the-striatum-of-immunodeficient-mice-importance-of-developmental-stage-of-both-transplant-and-host-recipient
#15
Colton M Tom, Shahab Younesi, Elana Meer, Catherine Bresee, Marlesa Godoy, Virginia B Mattis
Degeneration of the striatum can occur in multiple disorders with devastating consequences for the patients. Infantile infections with streptococcus, measles, or herpes can cause striatal necrosis associated with dystonia or dyskinesia; and in patients with Huntington's disease the striatum undergoes massive degeneration leading to behavioral, psychological and movement issues, ultimately resulting in death. Currently, only supportive therapies are available for striatal degeneration. Clinical trials have shown some efficacy using transplantation of fetal-derived primary striatal progenitors...
July 28, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28751996/leiomyosarcoma-and-squamous-cell-carcinoma-arising-in-mature-cystic-teratoma-of-the-ovary
#16
Tip Pongsuvareeyakul, Kornkanok Sukpan, Somjet Chaicharoen, Surapan Khunamornpong
The occurrence of malignant transformation in mature cystic teratoma of the ovary is rare, with squamous cell carcinoma being the most common histologic type. Sarcomatous transformation has been rarely described in the literature. We present a case of leiomyosarcoma with a minor component of squamous cell carcinoma arising in mature cystic teratoma of ovary in a 65-year-old woman. The malignant tumor showed two distinct components of sarcomatous and invasive epithelial elements, which were confirmed by immunostaining...
2017: Case Reports in Pathology
https://www.readbyqxmd.com/read/28751141/histology-stratified-tumor-control-and-patient-survival-following-stereotactic-radiosurgery-for-pineal-region-tumors-a-report-from-the-international-gamma-knife-research-foundation
#17
Christian Iorio-Morin, Hideyuki Kano, Marshall Huang, L Dade Lunsford, Gabriela Simonová, Roman Liscak, Or Cohen-Inbar, Jason Sheehan, Cheng-Chia Lee, Hsiu-Mei Wu, David Mathieu
OBJECT: Pineal region tumors represent a rare and histologically diverse group of lesions. Few studies are available to guide management and the outcomes following stereotactic radiosurgery (SRS) are unknown for many histologies. METHODS: Patients who underwent SRS for a pineal region tumor and for whom at least 6 months of imaging follow-up was available were retrospectively assessed in five centers. Data was collected from the medical record and histology-level analyses were performed, including actuarial tumor control and survival analyses...
July 24, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28750664/harvesting-multipotent-progenitor-cells-from-a-small-sample-of-tonsillar-biopsy-for-clinical-applications
#18
Raju Khatri, Michal Arad, Timothy Ortlip, Benjamin A Portney, W Alex Meltzer, Silviu Diaconu, Lorna E Silipino, Ying Wang, David M Kaetzel, Rodney J Taylor, Michal Zalzman
BACKGROUND: Human adult stem cells hold the potential for the cure of numerous conditions and degenerative diseases. They possess major advantages over pluripotent stem cells as they can be derived from donors at any age, and therefore pose no ethical concerns or risk of teratoma tumor formation in vivo. Furthermore, they have a natural ability to differentiate and secrete factors that promote tissue healing without genetic manipulation. However, at present, clinical applications of adult stem cells are limited by a shortage of a reliable, standardized, and easily accessible tissue source which does not rely on specimens discarded from unrelated surgical procedures...
July 27, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28750644/a-retrospective-study-of-reproductive-outcomes-after-fertility-sparing-surgery-and-postoperative-adjuvant-chemotherapy-in-malignant-ovarian-germ-cell-tumors-and-sex-cord-stromal-tumors
#19
Ning Zhang, Ruifang Chen, Keqin Hua, Ying Zhang
BACKGROUND: To retrospectively investigate reproductive outcomes after fertility-sparing surgery and postoperative adjuvant chemotherapy in malignant ovarian germ cell tumors (MOGCT) and sex cord-stromal tumors (SCST). METHODS: Data from 32 MOGCT (6 dysgerminomas, 6 yolk sac tumors, 17 immature teratomas, and 3 mixed germ cell tumors) and 9 SCST (4 granulosa cell tumors and 5 sertoli-leydig cell tumors) aged from 18 to 35, treated in the Obstetrics and Gynecology Hospital of Fudan University from October 2003 to October 2013 were collected and analyzed...
July 27, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28749258/coelomic-teratoma-in-a-blue-and-yellow-macaw-ara-ararauna
#20
Letícia B de Oliveira, Willian H M Santos, Alessandra V de Araújo, Anelise C Nepomuceno, Roselene Ecco
A 2-mo-old, female blue-and-yellow macaw (Ara ararauna) presented with severe abdominal distension, pain, and respiratory distress. Ultrasonographic examination detected a heterogeneous mass with multiple anechoic areas, compatible with a multilocular cyst, occupying most of the coelomic cavity. Postmortem examination revealed a mass of 12.0 × 8.5 × 5.0 cm, which had an irregular surface and was connected by a pedicle to the ileum. This mass compressed and displaced the liver, proventriculus, gizzard, and intestines cranially to the left...
June 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
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