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https://www.readbyqxmd.com/read/29774076/the-human-somatostatin-receptor-type-2-as-an-imaging-and-suicide-reporter-gene-for-pluripotent-stem-cell-derived-therapy-of-myocardial-infarction
#1
Katrien Neyrinck, Natacha Breuls, Bryan Holvoet, Wouter Oosterlinck, Esther Wolfs, Hubert Vanbilloen, Olivier Gheysens, Robin Duelen, Willy Gsell, Ivo Lambrichts, Uwe Himmelreich, Catherine M Verfaillie, Maurilio Sampaolesi, Christophe M Deroose
Rationale: Pluripotent stem cells (PSCs) are being investigated as a cell source for regenerative medicine since they provide an infinitive pool of cells that are able to differentiate towards every cell type of the body. One possible therapeutic application involves the use of these cells to treat myocardial infarction (MI), a condition where billions of cardiomyocytes (CMs) are lost. Although several protocols have been developed to differentiate PSCs towards CMs, none of these provide a completely pure population, thereby still posing a risk for neoplastic teratoma formation...
2018: Theranostics
https://www.readbyqxmd.com/read/29770282/mature-testicular-teratoma-with-a-focus-of-embryonal-carcinoma-a-case-report-and-review-of-literature
#2
Waliul Chowdhury, Muhammad Uzair Lodhi, Intekhab Askari Syed, Umar Rahim, Mustafa Rahim
We present a 37-year-old male patient with a mature teratoma of the right testicle with a focus of embryonal carcinoma. This patient's tumor metastasized radically to the retroperitoneum, right adrenal gland, bilateral lungs, and liver. A metastatic teratoma with embryonal carcinoma in males is a very rare case. We will describe our patient's case, diagnostic workup, and management in detail, in addition to reviewing the related literature.
March 15, 2018: Curēus
https://www.readbyqxmd.com/read/29768376/rare-case-of-squamous-cell-carcinoma-arising-in-a-recurrent-ovarian-mature-cystic-teratoma-of-a-young-woman-a-case-report-and-review-of-the-literature
#3
Xinge Feng, Lian Xu
RATIONALE: Malignant transformations of ovarian mature cystic teratomas (MCTs) occur rarely, especially in young women. Although it is extremely difficult to diagnose them, serum tumor marker level testing in combination with the use of imaging techniques may be useful in preoperative diagnosis. PATIENT CONCERNS: We present the case of a 31-year-old Chinese woman with the malignant transformation of an ovarian MCT. The patient had a history of oophorocystectomy due to an MCT of the right ovary 6 years prior and a gemellary pregnancy owing to in vitro fertilization and embryo transfer...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29765423/comparison-of-teratoma-formation-between-embryonic-stem-cells-and-parthenogenetic-embryonic-stem-cells-by-molecular-imaging
#4
Hongyan Tao, Xiaoniao Chen, Anbang Wei, Xianghe Song, Weiqiang Wang, Lu Liang, Qinjun Zhao, Zhibo Han, Zhongchao Han, Xiaojing Wang, Zongjin Li
With their properties of self-renewal and differentiation, embryonic stem (ES) cells hold great promises for regenerative therapy. However, teratoma formation and ethical concerns of ES cells may restrict their potential clinical applications. Currently, parthenogenetic embryonic stem (pES) cells have attracted the interest of researchers for its self-renewing and pluripotent differentiation while eliciting less ethic concerns. In this study, we established a model with ES and pES cells both stably transfected with a double-fusion reporter gene containing renilla luciferase (Rluc) and red fluorescent protein (RFP) to analyze the mechanisms of teratoma formation...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29765017/assessment-of-established-techniques-to-determine-developmental-and-malignant-potential-of-human-pluripotent-stem-cells
#5
(no author information available yet)
The International Stem Cell Initiative compared several commonly used approaches to assess human pluripotent stem cells (PSC). PluriTest predicts pluripotency through bioinformatic analysis of the transcriptomes of undifferentiated cells, whereas, embryoid body (EB) formation in vitro and teratoma formation in vivo provide direct tests of differentiation. Here we report that EB assays, analyzed after differentiation under neutral conditions and under conditions promoting differentiation to ectoderm, mesoderm, or endoderm lineages, are sufficient to assess the differentiation potential of PSCs...
May 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29761584/reduction-of-fibrosis-and-scar-formation-by-partial-reprogramming-in-vivo
#6
Markus C Doeser, Hans R Schöler, Guangming Wu
Transient expression of the transcription factors OCT4, SOX2, KLF4 and C-MYC (OSKM) to induce partial reprogramming while avoiding the pluripotent state and teratoma formation has recently been discussed as a strategy for regenerating damaged tissues in vivo, whereby the impact of partial reprogramming on tissue repair remains to be elucidated. Here, we activated OSKM transcription factors in cutaneous wounds of OSKM-inducible transgenic mice and found that induction of OSKM factors in excisional wounds caused a diminished fibroblast transdifferentiation to myofibroblasts and wound contraction...
May 15, 2018: Stem Cells
https://www.readbyqxmd.com/read/29760921/giant-peritoneal-loose-body-in-a-patient-with-end-stage-renal-disease
#7
Nadejda Cojocari, Leonard David
A 72-year-old male with end-stage renal disease underwent a computed tomography scan to assess renal function. An oval-shaped mass, 50 mm × 60 mm in size, was discovered incidentally in his recto-vesical pouch. Because it was suspected to be a teratoma, which could be an impediment for future renal transplantation, surgery was performed. It revealed a giant peritoneal loose body, a rare entity, that has not been reported before in patients with renal chronic insufficiency.
2018: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29759049/klinefelter-s-syndrome-with-lupus-encephalitis-and-retroperitoneal-teratoma
#8
C Ng Wq, S E Eide, Huang J, Khor Ym
We report a case of a middle-aged male who presented with pyrexia of unknown origin, oral ulcers, rash and bicytopenia. His past medical history included unexplained proteinuria, infertility and joint pain. Initial workup showed a large retroperitoneal soft tissue mass, which has appeared stable for 10 years. He subsequently developed neuropsychiatric symptoms with imaging findings of meningoencephalitis. Concurrent investigations showed elevated ANA, anti-double-stranded DNA (dsDNA) and ESR levels, as well as low complement levels...
January 1, 2018: Lupus
https://www.readbyqxmd.com/read/29756706/ovarian-masses-in-infant-juvenile-age
#9
Kaan Sonmez, Zafer Turkyilmaz, Ramazan Karabulut, A Can Basaklar
INTRODUCTION: The appropraite surgical treatment to pediatric patients with ovarian lesions are heterogeneous and ovarian preservation is desirable in children. The aim of this study is to the discuss findings related to a set of patients who were operated on for ovarian lesions. PATIENTS AND METHODS: A retrospective study carried out in 13 years on 56 patients under the age of 17. These patients were divided into 3 groups according to ovarian pathologic diagnosis: 25 with functional (cyts and torsion), 18 with epithelial ovarian lesions and 13 with germ cell tumours...
June 1, 2018: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/29755277/orbital-immature-teratoma-a-rare-entity-with-diagnostic-challenges
#10
Hind M Alkatan, Omar S AlObaidan, Hala Kfoury, Yasser H Al-Faky
Childhood orbital teratomas are congenital lesions that presents most often at birth with progressive, severe unilateral proptosis. Due to the rarity of such tumors, the diagnosis is often missed with delay in the patient's management. We are presenting a unique case of an immature right orbital teratoma with extensive growth in a full-term newly born baby boy. In this case report, we provide description of the clinical findings, initial misdiagnosis and the eventual management with review of similar reported cases...
January 2018: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/29755032/effects-of-mature-cystic-teratoma-on-reproductive-health-and-malignant-transformation-a-retrospective-analysis-of-80-cases
#11
Sefa Kurt, Hüseyin Aytuğ Avşar, Ömer Erbil Doğan, Hasan Bahadır Saatli, Uğur Saygılı
OBJECTIVE: Examining the cases of mature cystic teratoma (MCT) that are diagnosed and treated in our clinic regarding their association with fertility; and detecting the rate of malignant degeneration and the types of malignancies. MATERIAL AND METHODS: Patients, operated due to adnexal mass between April 2012 and August 2017 and diagnosed with MCT, were retrospectively examined. Mean age of the 80 cases, which met the criteria, was 30.60±10.5. 9 were suffering from infertility, according to hospital records...
May 14, 2018: Journal of the Turkish German Gynecological Association
https://www.readbyqxmd.com/read/29754175/stem-cell-therapies-for-neurodegenerative-diseases
#12
Kiminobu Sugaya, Manjusha Vaidya
Stem cell therapies have been proposed as a treatment option for neurodegenerative diseases, but the best stem cell source and therapeutic efficacy for neuroregeneration remain uncertain. Embryonic stem cells (ESCs) and neural stem cells (NSCs), which can efficiently generate neural cells, could be good candidates but they pose ethical and practical issues. Not only difficult to find the good source of those cells but also they alway pose immunorejection problem since they may not be an autologous cells. Even if we overcome the immunorejection problem, it has also been reported that transplantation of ESCs develop teratoma...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29753846/role-of-hnf1%C3%AE-in-the-differential-diagnosis-from-other-germ-cell-tumors
#13
Anne-Laure Rougemont, Jean-Christophe Tille
Identification of the yolk sac tumor (YST) component in germ cell tumors (GCT) may prove challenging, and highly sensitive and specific immunohistochemical markers are still lacking. Preliminary data from the literature suggest that HNF1β may represent a sensitive marker of YST. The specificity of HNF1β has not been addressed in GCT. A cohort of 49 YST specimens from 45 patients was designed, occurring either as pure tumors, or as a component of a mixed GCT. Immunohistochemistry was conducted on whole tumor sections using HNF1β...
May 10, 2018: Human Pathology
https://www.readbyqxmd.com/read/29749239/a-novel-fetal-sequence-patogenesis-resulting-in-oral-meningoencephalocele
#14
M Gabor, P Papcun, Jr M Krizko, Z Cierna, V Ferianec
OBJECTIVES: To analyze a rare triad of intracranial fetal pathologies and clinical study of the novel defined sequence pathogenesis based on prenatal and postmortem findings. METHODS: Complex multidisciplinary clinical analysis and review of up-to-date literature. RESULTS: In an 18-gestational-week fetus the screening ultrasound scan resembled the semilobar type of holoprosencephaly and oral tumor. After the indicated termination of pregnancy, the histopathology results confirmed another pathologies - oral meningoencephalocele, teratoma of the sellar area and large arachnoidal cyst of the anterior cerebral fossa...
2018: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29741810/quantitative-proteomics-study-reveals-changes-in-the-molecular-landscape-of-human-embryonic-stem-cells-with-impaired-stem-cell-differentiation-upon-exposure-to-titanium-dioxide-nanoparticles
#15
Lei Pan, Yew Mun Lee, Teck Kwang Lim, Qingsong Lin, Xiuqin Xu
The increasing number of nanoparticles (NPs) being used in various industries has led to growing concerns of potential hazards that NP exposure can incur on human health. However, its global effects on humans and the underlying mechanisms are not systemically studied. Human embryonic stem cells (hESCs), with the ability to differentiate to any cell types, provide a unique system to assess cellular, developmental, and functional toxicity in vitro within a single system highly relevant to human physiology. Here, the quantitative proteomics approach is adopted to evaluate the molecular consequences of titanium dioxide NPs (TiO2 NPs) exposure in hESCs...
May 9, 2018: Small
https://www.readbyqxmd.com/read/29739439/immature-teratoma-mimicking-pulmonary-stenosis-a-case-report
#16
Dardan Koçinaj, Xhevdet Krasniqi, Aurora Bakalli
BACKGROUND: Immature teratoma in a mediastinal location is a rare disease that might present as a valve pathology. Germ cell tumors with mediastinal locations account for up to 6% of immature teratoma cases. We present a case of an immature teratoma located primarily in the anterior mediastinum that manifested solely through symptoms of pulmonary stenosis. CASE PRESENTATION: We report a case of a 20-year-old white man with an immature teratoma who presented with progressive exertional dyspnea...
May 9, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29735495/anaesthetic-management-of-a-patient-with-a-unique-combination-of-anti-n-methyl-d-aspartate-receptor-encephalitis-and-stiff-person-syndrome
#17
Mohammad Hadi Gharedaghi, Arjang Khorasani, Nebojsa Nick Knezevic, Farzad Ebrahimi
Stiff-person syndrome (SPS) and anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis are rare paraneoplastic syndromes caused by antibodies that target the central nervous system. Here, we describe a 26-year-old woman who presented with psychosis, amnesia, rigidity and fever. After extensive diagnostic and laboratory workup, she was diagnosed with an ovarian teratoma which was causing the symptoms of anti-NMDAR encephalitis and SPS. The patient was successfully treated with laparoscopic removal of the ovarian tumour under general anaesthesia...
May 7, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29734172/preemptive-delivery-and-immediate-resection-for-fetuses-with-high-risk-sacrococcygeal-teratomas
#18
Heron D Baumgarten, Juliana S Gebb, Nahla Khalek, Julie S Moldenhauer, Mark P Johnson, William H Peranteau, Holly L Hedrick, N Scott Adzick, Alan W Flake
INTRODUCTION: Fetuses with "high-risk" sacrococcygeal teratoma (SCT) have a mortality rate of 40-50%. While fetal surgery may benefit select fetuses prior to 27 weeks' gestation, many fetuses die due to consequences of rapid tumor growth after 27 weeks. Here we report our experience applying "preemptive" delivery to fetuses who manifest signs of decompensation between 27 and 32 weeks. METHODS: A retrospective review of SCT fetuses delivered between 2010 and 2016 at ≤32 weeks' gestation was performed...
May 7, 2018: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/29734104/late-onset-anti-n-methyl-d-aspartate-receptor-encephalitis-in-china
#19
Le Zhang, Xu Liu, Xin-Yue Jiang, Yun-Hui Wang, Jin-Mei Li, Dong Zhou
PURPOSE: This study aimed to summarize the clinical characteristics and outcome of late-onset anti-N-methyl-d-aspartate receptor (anti-NMDAR) encephalitis in China. METHOD: All cases of people with a definitive diagnosis of anti-NMDAR encephalitis in West China Hospital between June 2012 and April 2017 were retrospectively reviewed. The demographics, clinical characteristics, and outcome of those patients (age≥45years old) were summarized. Comparisons were conducted between older (≥45years old) and younger (18-44years old) adults...
May 4, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29731315/multiple-neurosurgical-treatments-for-different-members-of-the-same-family-with-currarino-syndrome
#20
N Serratrice, L Fievet, F Albader, D Scavarda, H Dufour, S Fuentes
INTRODUCTION: Currarino's syndrome (CS) is an autosomal dominant disorder of embryonic development causing a rare malformating syndrome characterized by a triad of an anorectal malformations, presacral mass (most commonly an anterior sacral meningocele) and sacral bony defects. Mutations of the HLXB9 gene have been identified in most CS cases, but a precise genotype-phenotype correlation has not been described so far. Family screening is obligatory. The diagnosis is usually made during childhood and rarely in adulthood...
May 3, 2018: Neuro-Chirurgie
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