1
|
Waldhorn I, Turetsky T, Steiner D, Gil Y, Benyamini H, Gropp M, Reubinoff BE. Modeling sex differences in humans using isogenic induced pluripotent stem cells. Stem Cell Reports 2022; 17:2732-2744. [PMID: 36427492 PMCID: PMC9768579 DOI: 10.1016/j.stemcr.2022.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 10/26/2022] [Accepted: 10/30/2022] [Indexed: 11/27/2022] Open
Abstract
Biological sex is a fundamental trait influencing development, reproduction, pathogenesis, and medical treatment outcomes. Modeling sex differences is challenging because of the masking effect of genetic variability and the hurdle of differentiating chromosomal versus hormonal effects. In this work we developed a cellular model to study sex differences in humans. Somatic cells from a mosaic Klinefelter syndrome patient were reprogrammed to generate isogenic induced pluripotent stem cell (iPSC) lines with different sex chromosome complements: 47,XXY/46,XX/46,XY/45,X0. Transcriptional analysis of the hiPSCs revealed novel and known genes and pathways that are sexually dimorphic in the pluripotent state and during early neural development. Female hiPSCs more closely resembled the naive pluripotent state than their male counterparts. Moreover, the system enabled differentiation between the contributions of X versus Y chromosome to these differences. Taken together, isogenic hiPSCs present a novel platform for studying sex differences in humans and bear potential to promote gender-specific medicine in the future.
Collapse
Affiliation(s)
- Ithai Waldhorn
- Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Tikva Turetsky
- Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Debora Steiner
- Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Yaniv Gil
- Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Hadar Benyamini
- Bioinformatics Unit of the I-CORE at Hebrew University and Hadassah Medical Center, Jerusalem, Israel
| | - Michal Gropp
- Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Benjamin E. Reubinoff
- Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah Hebrew University Medical Center, Jerusalem, Israel,Department of Obstetrics and Gynecology, Ein Kerem, Hadassah Hebrew University Medical Center, Jerusalem, Israel,Corresponding author
| |
Collapse
|
2
|
Gropp M, Waldhorn I, Gil Y, Steiner D, Turetsky TT, Smith Y, Sabag O, Falick-Michaeli T, Ram SE, Reubinoff BE. Laminin111-based defined culture promoting self-renewing human pluripotent stem cells with properties of the early post-implantation epiblast. Stem Cell Reports 2022; 17:2643-2660. [PMID: 36368331 PMCID: PMC9768580 DOI: 10.1016/j.stemcr.2022.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 11/11/2022] Open
Abstract
In the mammalian embryo, a formative pluripotent phase is proposed to exist at the early post-implantation period, during the transition from the pre-implantation naive-to the post-implantation primed-epiblast. By recapitulating a laminin component of the extracellular matrix niche during embryonic formative transition, and defined culture conditions, we generated cultures highly enriched for self-renewing human pluripotent stem cells (hPSCs), exhibiting properties of early post-implantation epiblast cells. These hPSCs display post-implantation-epiblast gene expression profiles. FGF and TGF-β signaling maintain their self-renewal for multiple passages. They have inactive canonical Wnt signaling, do not express primitive streak markers, and are competent to initiate differentiation toward germline and somatic fates. hPSCs exhibiting early post-implantation epiblast properties may shed light on human embryonic PSCs development and may serve for initiating somatic and germ cell specification.
Collapse
Affiliation(s)
- Michal Gropp
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Ithai Waldhorn
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Yaniv Gil
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Debora Steiner
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Tikva Tako Turetsky
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Yoav Smith
- The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ofra Sabag
- Department of Developmental Biology and Cancer Research, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Tal Falick-Michaeli
- Rubin Chair in Medical Science, Department of Developmental Biology & Cancer Research, IMRIC, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sharona Even Ram
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Benjamin E. Reubinoff
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel,Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel,Corresponding author
| |
Collapse
|
3
|
Koenig E, Shieh P, Abdel-Hamid H, Connolly A, McDonald C, Steiner D, Malhotra J, Khan N, Hu W, Han B, Ciafaloni E. DMD – THERAPY. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Scaglioni D, Catapano F, Ellis M, Torelli S, Chambers D, Feng L, Husayni S, Malhotra J, Harriman S, Koenig E, Dugar A, Steiner D, Morgan J, Phadke R, Muntoni F. DMD – BIOMARKERS & OUTCOME MEASURES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Birger A, Ben-Dor I, Ottolenghi M, Turetsky T, Gil Y, Sweetat S, Perez L, Belzer V, Casden N, Steiner D, Izrael M, Galun E, Feldman E, Behar O, Reubinoff B. Human iPSC-derived astrocytes from ALS patients with mutated C9ORF72 show increased oxidative stress and neurotoxicity. EBioMedicine 2019; 50:274-289. [PMID: 31787569 PMCID: PMC6921360 DOI: 10.1016/j.ebiom.2019.11.026] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/24/2019] [Accepted: 11/18/2019] [Indexed: 12/12/2022] Open
Abstract
Background Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that affects motor neurons (MNs). It was shown that human astrocytes with mutations in genes associated with ALS, like C9orf72 (C9) or SOD1, reduce survival of MNs. Astrocyte toxicity may be related to their dysfunction or the release of neurotoxic factors. Methods We used human induced pluripotent stem cell-derived astrocytes from ALS patients carrying C9orf72 mutations and non-affected donors. We utilized these cells to investigate astrocytic induced neuronal toxicity, changes in astrocyte transcription profile as well as changes in secretome profiles. Findings We report that C9-mutated astrocytes are toxic to MNs via soluble factors. The toxic effects of astrocytes are positively correlated with the length of astrocyte propagation in culture, consistent with the age-related nature of ALS. We show that C9-mutated astrocytes downregulate the secretion of several antioxidant proteins. In line with these findings, we show increased astrocytic oxidative stress and senescence. Importantly, media conditioned by C9-astrocytes increased oxidative stress in wild type MNs. Interpretation Our results suggest that dysfunction of C9-astrocytes leads to oxidative stress of themselves and MNs, which probably contributes to neurodegeneration. Our findings suggest that therapeutic strategies in familial ALS must not only target MNs but also focus on astrocytes to abrogate nervous system injury.
Collapse
Affiliation(s)
- Anastasya Birger
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel; Department of Developmental Biology and Cancer Research, Institute of Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University, P.O. Box 12272, 91120 Jerusalem, Israel
| | - Israel Ben-Dor
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel
| | - Miri Ottolenghi
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel
| | - Tikva Turetsky
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel
| | - Yaniv Gil
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel
| | - Sahar Sweetat
- Department of Developmental Biology and Cancer Research, Institute of Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University, P.O. Box 12272, 91120 Jerusalem, Israel
| | - Liat Perez
- Department of Developmental Biology and Cancer Research, Institute of Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University, P.O. Box 12272, 91120 Jerusalem, Israel
| | - Vitali Belzer
- Department of Developmental Biology and Cancer Research, Institute of Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University, P.O. Box 12272, 91120 Jerusalem, Israel
| | - Natania Casden
- Department of Developmental Biology and Cancer Research, Institute of Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University, P.O. Box 12272, 91120 Jerusalem, Israel
| | - Debora Steiner
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel
| | - Michal Izrael
- Kadimastem Ltd., Sapir 7, Weizmann Science Park, Nes-Ziona, Israel
| | - Eithan Galun
- The Goldyne Savad Institute of Gene Therapy, Hadassah University Medical Center, Jerusalem 91120, Israel
| | - Eva Feldman
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - Oded Behar
- Department of Developmental Biology and Cancer Research, Institute of Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University, P.O. Box 12272, 91120 Jerusalem, Israel.
| | - Benjamin Reubinoff
- The Sidney and Judy Swartz Embryonic Stem Cell Research Center of The Goldyne Savad Institute of Gene Therapy & The Department of Obstetrics & Gynecology, Hadassah University Medical Center, Jerusalem 91120, Israel.
| |
Collapse
|
6
|
Finke J, Steiner D, Kwade A. Instant preparations for the individualization of poorly soluble APIs in orodipersible films. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- J. H. Finke
- Institut für Partikeltechnik; Pharma- und Biopartikeltechnik; Volkmaroder Straße 5 38104 Braunschweig Germany
- Zentrum für Pharmaverfahrenstechnik - PVZ; Formulierung und Verpackungstechnik; Franz-Liszt-Straße 35A 38106 Braunschweig Germany
| | - D. Steiner
- Institut für Partikeltechnik; Pharma- und Biopartikeltechnik; Volkmaroder Straße 5 38104 Braunschweig Germany
- Zentrum für Pharmaverfahrenstechnik - PVZ; Formulierung und Verpackungstechnik; Franz-Liszt-Straße 35A 38106 Braunschweig Germany
| | - A. Kwade
- Institut für Partikeltechnik; Pharma- und Biopartikeltechnik; Volkmaroder Straße 5 38104 Braunschweig Germany
- Zentrum für Pharmaverfahrenstechnik - PVZ; Formulierung und Verpackungstechnik; Franz-Liszt-Straße 35A 38106 Braunschweig Germany
| |
Collapse
|
7
|
Steiner D, Auer A, Portenkirchner E, Kunze-Liebhäuser J. The role of surface films during lithiation of amorphous and anatase TiO2 nanotubes. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.11.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
Steiner D, Puille M, Khalisi A, Matter HP, Stürz H, Bauer R, Klell R. Antigranulocyte scintigraphy of septic loosening of hip prosthesis: influence of different analyzing methods. Nuklearmedizin 2018. [DOI: 10.1055/s-0038-1623874] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Aim: Diagnosis of infection with help of antigranulocyte scintigraphy near body stem is difficult because of contemporary visualisation of bone marrow. Therefore, we investigated, whether it is possible to improve the accuracy in diagnosing septic loosening of hip endoprosthesis by changing the analyzing methods. Methods: In 28 patients, the results of a visual interpretation of late scan, a visual interpretation and a quantitative interpretation of time-activity-course were compared. These results were verified by histology respectively microbiology. Results: Histological and microbiological verification found 14 septic loosening and 14 aseptic loosening of the hip protheses. Therefore, sensitivity, specifity, negative and positive predictive value for the visual interpretation of late scan were 0.86,0.57,0.80 and 0.67. For visual and quantitative interpretation of time-activity-course we found 0.86,0.79,0.85 and 0.80 respectively 1,0.93, 1,0.93. For interobserver agreement we found kappa coefficients of 0.28 ± 0.2 for visual interpretation of late scan, 0.48 ±0.17 for visual interpretation and 1.0 ± 0 for quantitative interpretation of time-activity-course. Conclusion: In all investigated values quantitative interpretation of time-activity-course was superior to the other analyzing methods. Therefore, antigranulocyte scintigraphy for septic loosening of hip endoprosthesis should be interpreted quantitativly.
Collapse
|
9
|
Catchpole I, Brett S, Sheppard N, Pradas DC, Jing J, Steiner D, Figueroa D, Tsvetkov L, Katlinskaya Y, Kaczynski H, Abbott R, Silk J, Adams K, Gerry A, Quattrini A, Tavano B, Crossland K, Weiderman G, Cornforth T, Britten C. Engineering T-cells for adoptive cell therapy to overcome TGF-β-mediated immunosuppression in the tumour microenvironment. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx711.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
10
|
Affiliation(s)
- D. Steiner
- Rensselaer Polytechnic Institute Troy, NY 12180-3590 518/27 0-6407
| | - M. J. Embrechts
- Rensselaer Polytechnic Institute Troy, NY 12180-3590 518/27 0-6407
| | - G. Varsamis
- Rensselaer Polytechnic Institute Troy, NY 12180-3590 518/27 0-6407
| | - K. Wrisley
- Rensselaer Polytechnic Institute Troy, NY 12180-3590 518/27 0-6407
| | - L. Deutch
- Grumman Aerospace Corp. Bethpage, NY 11714 516/57 5-5055
| | - P. Gierszewski
- Canadian Fusion Fuels Technology Project 27 00 Lakeshore Road Wast Mississauga, Ontario L5J 1K3 416/823-7387
| |
Collapse
|
11
|
Najmabadi F, Conn RW, Bathke CG, Baxi CB, Bromberg L, Brooks J, Cheng ET, Davis F, Ehst DA, El-Guebaly LA, Emmert GA, Dolan TJ, Hasan MZ, Hassanein A, Herring JS, Holmes JA, Hua T, Hull A, Jardin SC, Kessel C, Khater HY, Krakowski RA, Leuer JA, Lousteau DC, Mattis R, Mau TK, McQuillan BW, Picologlou B, Puhn FA, Santarius JF, Sawan M, Schultz J, Schultz KR, Sharafat S, Snead L, Steiner D, Strickler DJ, Sviatoslavsky IN, Sze DK, Valenti M, Werley KA, Wong CPC. The ARIES-II and ARIES-IV Second-Stability Tokamak Reactors. ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst92-a29970] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - R. W. Conn
- University of California, Los Angeles, CA
| | | | | | - L. Bromberg
- Massachusetts Institute of Technology, Cambridge, MA
| | - J. Brooks
- Argonne National Laboratory, Argonne, IL
| | | | - F. Davis
- Oak Ridge National Laboratory, Oak Ridge, TN
| | - D. A. Ehst
- Argonne National Laboratory, Argonne, IL
| | | | | | - T. J. Dolan
- Idaho National Engineering Laboratory, Idaho Falls, I
| | | | | | - J. S. Herring
- Idaho National Engineering Laboratory, Idaho Falls, I
| | | | - T. Hua
- Argonne National Laboratory, Argonne, IL
| | - A. Hull
- Argonne National Laboratory, Argonne, IL
| | - S. C. Jardin
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | - C. Kessel
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | | | | | | | | | - R. Mattis
- Argonne National Laboratory, Argonne, IL
| | - T-K. Mau
- University of California, Los Angeles, CA
| | | | | | | | | | - M. Sawan
- University of Wisconsin, Madison, WI
| | - J. Schultz
- Massachusetts Institute of Technology, Cambridge, MA
| | | | | | - L. Snead
- Rensselaer Polytechnic Institute, Troy, NY
| | - D. Steiner
- Rensselaer Polytechnic Institute, Troy, NY
| | | | | | - D-K. Sze
- Argonne National Laboratory, Argonne, IL
| | - M. Valenti
- Rensselaer Polytechnic Institute, Troy, NY
| | | | | | | |
Collapse
|
12
|
Najmabadi F, Conn RW, Bathke CG, Bromberg L, Cheng ET, Cohn DR, Cooke PIH, Creedon RL, Ehst DA, Evans K, Ghoniem NM, Grotz SP, Hasan MZ, Hogan JT, Herring JS, Hyatt AW, Ibrahim E, Jardin SA, Kessel C, Klasky M, Krakowski RA, Kunugi T, Leuer JA, Mandrekas J, Martin RC, Mau TK, Miller RL, Peng YKM, Reid RL, Santarius JF, Schaffer MJ, Schultz J, Schultz KR, Schwartz J, Sharafat S, Singer CE, Snead L, Steiner D, Strickler DJ, Sze DK, Valenti M, Ward DJ, Williams JEC, Wittenberg LJ, Wong CPC. The ARIES-I Tokamak Reactor Study†. ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst91-a29440] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - R. W. Conn
- University of California, Los Angeles, CA,
| | | | - L. Bromberg
- Massachusetts Institute of Technology, Cambridge, MA
| | | | - D. R. Cohn
- Massachusetts Institute of Technology, Cambridge, MA
| | | | | | - D. A. Ehst
- Argonne National Laboratory, Argonne, IL,
| | - K. Evans
- Argonne National Laboratory, Argonne, IL,
| | | | | | | | - J. T. Hogan
- Oak Ridge National Laboratory, Oak Ridge, TN,
| | - J. S. Herring
- Idaho National Engineering Laboratory, Idaho Falls, ID
| | | | - E. Ibrahim
- University of California, Los Angeles, CA,
| | - S. A. Jardin
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | - C. Kessel
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | - M. Klasky
- Rensselaer Polytechnic Institute, Troy, NY,
| | | | - T. Kunugi
- University of California, Los Angeles, CA,
| | | | | | | | - T-K. Mau
- University of California, Los Angeles, CA,
| | | | | | - R. L. Reid
- Oak Ridge National Laboratory, Oak Ridge, TN,
| | | | | | - J. Schultz
- Massachusetts Institute of Technology, Cambridge, MA
| | | | - J. Schwartz
- Massachusetts Institute of Technology, Cambridge, MA
| | | | | | - L. Snead
- Rensselaer Polytechnic Institute, Troy, NY,
| | - D. Steiner
- Rensselaer Polytechnic Institute, Troy, NY,
| | | | - D-K. Sze
- Argonne National Laboratory, Argonne, IL,
| | - M. Valenti
- Rensselaer Polytechnic Institute, Troy, NY,
| | - D. J. Ward
- Princeton Plasma Physics Laboratory, Princeton, NJ
| | | | | | | | | |
Collapse
|
13
|
Karrasch T, Walmrath HD, Kampschulte M, Steiner D, Seeger W, Padberg W, Sibelius U, Gattenlöhner S, Schäffler A. [Disseminated osteolytic lesions in a 28-year-old refugee]. Internist (Berl) 2017; 59:486-493. [PMID: 28748250 DOI: 10.1007/s00108-017-0300-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A 28-year-old Syrian refugee presented with right-sided knee pain and progressive deterioration of the general condition over the past months. Laboratory diagnostics revealed severe hypercalcemia due to primary hyperparathyroidism, and computed tomography (CT) scanning demonstrated disseminated osteolytic lesions throughout the skeleton. Histologically, these lesions were characterized by multinuclear giant cells (defining these lesions as so-called brown tumors). Finally, surgical removal of a jugular mass allowed the histopathologic diagnosis of a sporadic parathyroid carcinoma. In the patient, this condition was associated with a mutation in the HPRT2 gene locus.
Collapse
Affiliation(s)
- T Karrasch
- Klinik und Poliklinik für Innere Medizin III, Universitätsklinikum Gießen und Marburg, Standort Gießen, 35392, Gießen, Deutschland.
| | - H D Walmrath
- Klinik und Poliklinik für Innere Medizin II, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - M Kampschulte
- Institut für Radiologie, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - D Steiner
- Klinik für Nuklearmedizin, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - W Seeger
- Klinik und Poliklinik für Innere Medizin II, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - W Padberg
- Klinik und Poliklinik für Allgemein‑, Viszeral- und Thoraxchirurgie, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - U Sibelius
- Klinik und Poliklinik für Innere Medizin IV/V, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - S Gattenlöhner
- Institut für Pathologie, Universitätsklinikum Gießen und Marburg, Standort Gießen, Gießen, Deutschland
| | - A Schäffler
- Klinik und Poliklinik für Innere Medizin III, Universitätsklinikum Gießen und Marburg, Standort Gießen, 35392, Gießen, Deutschland
| |
Collapse
|
14
|
Affiliation(s)
- D. Steiner
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
| |
Collapse
|
15
|
Tillack MS, Turnbull AD, Waganer LM, Malang S, Steiner D, Sharpe JP, Cadwallader LC, El-Guebaly L, Raffray AR, Najmabadi F, Peipert RJ, Weaver TL. An Evaluation of Fusion Energy R&D Gaps Using Technology Readiness Levels. Fusion Science and Technology 2017. [DOI: 10.13182/fst09-a9033] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. S. Tillack
- UC San Diego Center for Energy Research, 9500 Gilman Drive #0417, La Jolla, CA 92093
| | | | | | | | - D. Steiner
- Rensselaer Polytechnic Institute, Troy, NY
| | | | | | | | - A. R. Raffray
- UC San Diego Center for Energy Research, 9500 Gilman Drive #0417, La Jolla, CA 92093
| | - F. Najmabadi
- UC San Diego Center for Energy Research, 9500 Gilman Drive #0417, La Jolla, CA 92093
| | | | | | | |
Collapse
|
16
|
Steiner D, Hubertus A, Arkudas A, Taeger CD, Ludolph I, Boos AM, Schmitz M, Horch RE, Beier JP. Scalp reconstruction: A 10-year retrospective study. J Craniomaxillofac Surg 2016; 45:319-324. [PMID: 28043755 DOI: 10.1016/j.jcms.2016.11.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 10/14/2016] [Accepted: 11/30/2016] [Indexed: 11/18/2022] Open
Abstract
Scalp reconstruction is a challenging task for the reconstructive surgeon. In consideration of the anatomical and cosmetic characteristics, the defect depth and size, an armamentarium of reconstructive procedures ranging from skin grafts over local flaps to free tissue transfer has been described. In this 10-year retrospective study, 85 operative procedures for scalp reconstruction were performed at our department. The underlying entity, defect size/depth, reconstructive procedure, complications, and mean hospital stay were analyzed. In most cases, scalp reconstruction was necessary after oncologic resection (67%) or radiation therapy (16%). A total of 85 operative procedures were performed for scalp reconstruction including local flaps (n = 50), free tissue transfer (n = 18), and skin grafts (n = 17). Regarding the complication rate, we could detect an overall major complication rate of 16.5% with one free flap loss. Briefly, local flaps are an adequate and safe procedure for limited scalp defects. In the case of extensive scalp defects affecting the calvarium, prior multiple surgical interventions and/or radiation, we prefer free tissue transfer.
Collapse
Affiliation(s)
- D Steiner
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - A Hubertus
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - A Arkudas
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - C D Taeger
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - I Ludolph
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - A M Boos
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - M Schmitz
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - R E Horch
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - J P Beier
- Department of Plastic and Hand Surgery (Head: Univ. Prof. Dr. med. Dr. h.c. R. E. Horch), University Hospital of Erlangen, Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Erlangen, Germany.
| |
Collapse
|
17
|
Bochtler W, Gragert L, Patel ZI, Robinson J, Steiner D, Hofmann JA, Pingel J, Baouz A, Melis A, Schneider J, Eberhard HP, Oudshoorn M, Marsh SGE, Maiers M, Müller CR. A comparative reference study for the validation of HLA-matching algorithms in the search for allogeneic hematopoietic stem cell donors and cord blood units. HLA 2016; 87:439-48. [PMID: 27219013 PMCID: PMC5089599 DOI: 10.1111/tan.12817] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 04/19/2016] [Accepted: 04/22/2016] [Indexed: 12/02/2022]
Abstract
The accuracy of human leukocyte antigen (HLA)‐matching algorithms is a prerequisite for the correct and efficient identification of optimal unrelated donors for patients requiring hematopoietic stem cell transplantation. The goal of this World Marrow Donor Association study was to validate established matching algorithms from different international donor registries by challenging them with simulated input data and subsequently comparing the output. This experiment addressed three specific aspects of HLA matching using different data sets for tasks of increasing complexity. The first two tasks targeted the traditional matching approach identifying discrepancies between patient and donor HLA genotypes by counting antigen and allele differences. Contemporary matching procedures predicting the probability for HLA identity using haplotype frequencies were addressed by the third task. In each task, the identified disparities between the results of the participating computer programs were analyzed, classified and quantified. This study led to a deep understanding of the algorithms participating and finally produced virtually identical results. The unresolved discrepancies total to less than 1%, 4% and 2% for the three tasks and are mostly because of individual decisions in the design of the programs. Based on these findings, reference results for the three input data sets were compiled that can be used to validate future matching algorithms and thus improve the quality of the global donor search process.
Collapse
Affiliation(s)
- W Bochtler
- Zentrales Knochenmarkspender-Register Deutschland (ZKRD), Ulm, Germany
| | - L Gragert
- National Marrow Donor Program (NMDP), Minneapolis, MN, USA
| | - Z I Patel
- Anthony Nolan Research Institute (ANRI), Royal Free Hospital, London, UK
| | - J Robinson
- Anthony Nolan Research Institute (ANRI), Royal Free Hospital, London, UK.,UCL Cancer Institute, Royal Free Campus, London, UK
| | - D Steiner
- Czech Stem Cells Registry (CSCR) and Department of Cybernetics, Czech Technical University, Prague, Czech Republic
| | - J A Hofmann
- DKMS German Bone Marrow Donor Center, Tübingen, Germany
| | - J Pingel
- DKMS German Bone Marrow Donor Center, Tübingen, Germany
| | - A Baouz
- Agence de la biomedecine - Registre France Greffe de Moelle (FGM), Paris, France
| | - A Melis
- Bone Marrow Donors Worldwide (BMDW) and Europdonor operated by Matchis, Leiden, The Netherlands
| | - J Schneider
- National Marrow Donor Program (NMDP), Minneapolis, MN, USA
| | - H-P Eberhard
- Zentrales Knochenmarkspender-Register Deutschland (ZKRD), Ulm, Germany
| | - M Oudshoorn
- Bone Marrow Donors Worldwide (BMDW) and Europdonor operated by Matchis, Leiden, The Netherlands
| | - S G E Marsh
- Anthony Nolan Research Institute (ANRI), Royal Free Hospital, London, UK.,UCL Cancer Institute, Royal Free Campus, London, UK
| | - M Maiers
- National Marrow Donor Program (NMDP), Minneapolis, MN, USA
| | - C R Müller
- Zentrales Knochenmarkspender-Register Deutschland (ZKRD), Ulm, Germany
| |
Collapse
|
18
|
Hamscho N, Pabst S, Hahn A, Steiner D, Altinkilic B, Stracke H, Krombach GA. Enzephalopathie mit transienter (reversibler) Splenium Läsion bei Pyelonephritis durch vesikouretralen Reflux. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
19
|
Hörgele J, Tiede H, Steiner D, Voswinckel R, Schulz R, Kemkes-Matthes B, Olschewski H, Ghofrani A, Seeger W, Reichenberger F. Langzeitergebnisse eines Screenings auf pulmonale Hypertonie nach Lungenembolie. Pneumologie 2014. [DOI: 10.1055/s-0034-1368003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
20
|
Eberhard HP, Madbouly AS, Gourraud PA, Balère ML, Feldmann U, Gragert L, Torres HM, Pingel J, Schmidt AH, Steiner D, van der Zanden HGM, Oudshoorn M, Marsh SGE, Maiers M, Müller CR. Comparative validation of computer programs for haplotype frequency estimation from donor registry data. ACTA ACUST UNITED AC 2014; 82:93-105. [PMID: 23849067 DOI: 10.1111/tan.12160] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 04/15/2013] [Accepted: 05/31/2013] [Indexed: 11/30/2022]
Abstract
Estimation of human leukocyte antigen (HLA) haplotype frequencies from unrelated stem cell donor registries presents a challenge because of large sample sizes and heterogeneity of HLA typing data. For the 14th International HLA and Immunogenetics Workshop, five bioinformatics groups initiated the 'Registry Diversity Component' aiming to cross-validate and improve current haplotype estimation tools. Five datasets were derived from different donor registries and then used as input for five different computer programs for haplotype frequency estimation. Because of issues related to heterogeneity and complexity of HLA typing data identified in the initial phase, the same five implementations, and two new ones, were used on simulated datasets in a controlled experiment where the correct results were known a priori. These datasets contained various fractions of missing HLA-DR modeled after European haplotype frequencies. We measured the contribution of sampling fluctuation and estimation error to the deviation of the frequencies from their true values, finding equivalent contributions of each for the chosen samples. Because of patient-directed activities, selective prospective typing strategies and the variety and evolution of typing technology, some donors have more complete and better HLA data. In this setting, we show that restricting estimation to fully typed individuals introduces biases that could be overcome by including all donors in frequency estimation. Our study underlines the importance of critical review and validation of tools in registry-related activity and provides a sustainable framework for validating the computational tools used. Accurate frequencies are essential for match prediction to improve registry operations and to help more patients identify suitably matched donors.
Collapse
Affiliation(s)
- H-P Eberhard
- Zentrales Knochenmarkspender-Register Deutschland (ZKRD), Ulm, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Rast A, Steiner D, Kutz A, Bargetzi M, Mueller B, Schuetz P. Early risk stratification in patients with oncological and hematological malignancies in the emergency department. Crit Care 2014. [PMCID: PMC4068890 DOI: 10.1186/cc13232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
22
|
Simunovic F, Steiner D, Pfeifer D, Stark GB, Finkenzeller G, Lampert F. Increased extracellular matrix and proangiogenic factor transcription in endothelial cells after cocultivation with primary human osteoblasts. J Cell Biochem 2013; 114:1584-94. [PMID: 23334902 DOI: 10.1002/jcb.24500] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 01/08/2013] [Indexed: 12/12/2022]
Abstract
The most promising strategies in bone engineering have concentrated on providing sufficient vascularization to support the newly forming tissue. In this context, recent research in the field has focused on studying the complex interactions between bone forming and endothelial cells. Our previous work has demonstrated that direct contact cocultivation of human umbilical vein endothelial cells (HUVECs) with primary human osteoblasts (hOBs) induces the osteogenic phenotype and survival of hOBs. In order to investigate the mechanisms that lead to this effect, we performed microarray gene expression profiling on HUVECs following cocultivation with hOBs. Our data reveal profound transcriptomic changes that are dependent on direct cell contact between these cell populations. Pathway analysis using the MetaCore™ platform and literature research suggested a striking upregulation of transcripts related to extracellular matrix and cell-matrix interactions. Upregulation of a number of major angiogenetic factors confirms previous observations that HUVECs enter a proangiogenic state upon cocultivation with osteoblasts. Interestingly, the downregulated transcripts clustered predominantly around cell cycle-related processes. The microarray data were confirmed by quantitative real-time RT-PCR on selected genes. Taken together, this study provides a platform for further inquiries in complex interactions between endothelial cells and osteoblasts.
Collapse
Affiliation(s)
- F Simunovic
- Department of Plastic and Hand Surgery, Freiburg University Medical Center, Freiburg, Germany
| | | | | | | | | | | |
Collapse
|
23
|
Roeb E, Dreyer T, Steiner D, Bräuninger A, Gattenlöhner S. [A 75-year-old female patient with pleural effusion and gastric metastases of a poorly differentiated carcinoma]. Internist (Berl) 2013; 54:242, 244-8. [PMID: 23223952 DOI: 10.1007/s00108-012-3184-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A 75-year-old woman was found to have left-sided pleural effusion and endoscopy revealed the rare entity of adenoid cystic carcinoma metastases in the gastric mucosa. Approximately 20% of patients with this carcinoma suffer from distant metastases. For the initial staging detection of adenoid cystic carcinoma metastasis with positron emission tomography (PET) or PET computed tomography (CT) is recommended. The recurrent t(6;9)(q22-23;p23-24) translocation that results in a fusion of the two transcription factor genes MYB and NFIB is detectable in half of the cases. As in our case molecular pathology can confirm the correct diagnosis and identification of the localization of the primary tumor.
Collapse
Affiliation(s)
- E Roeb
- Zentrum für Innere Medizin, Schwerpunkt Gastroenterologie, Medizinische Klinik II, Universitätsklinikum Gießen und Marburg (UKGM) und Justus-Liebig-Universität Gießen, Klinikstr. 33, 35385, Gießen.
| | | | | | | | | |
Collapse
|
24
|
Berthold LD, Steiner D, Scholz D, Alzen G, Zimmer KP. Imaging of chronic inflammatory bowel disease with 18F-FDG PET in children and adolescents. Klin Padiatr 2013; 225:212-7. [PMID: 23519750 DOI: 10.1055/s-0033-1334878] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Standard for diagnosis of inflammatory bowel disease (IBD) is the endoscopy of the stomach and the intestine. Aim of this study was to determine the value of 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) in pediatric patients with mild to moderate IBD.We included 23 children and adolescents between 8 and 17 years (median 15 years, 13 boys, 10 girls) in this retrospective study in a routine clinical setting. Diagnoses were Crohn's disease in 19 and ulcerative colitis in 4 cases.3 children had a conventional FDG-PET, 20 patients a combined FDG-PET-computed tomography exam. All children had upper and lower intestinal endoscopy with biopsy and a Hydro-MRI exam to assess the jejunum and proximal ileum. The gastrointestinal tract was divided in 7 segments: Stomach plus duodenum, jejunum and proximal ileum, terminal ileum, cecum plus ascending colon, transverse colon, descending colon, and rectosigmoid.Superficial gastric lesions were missed, gastric ulcerations were detected. For the stomach, the sensitivity was 0.25, the specificity was 1.00, the positive predictive value was 1.00, for the lower intestine (terminal ileum and colon) the values were 0.74, 0.88, and 0.96; for the terminal ileum 0.89, 0.75 and 0.94, respectively.The sensitivity and specificity for of ileal and colonic lesions is high. FDG-PET has to be discussed as a tool for the determination of extent and degree of inflammation, especially in those parts of the small bowel that are not accessible to endoscopy. This has to be weighed against the additional radiation exposure administrated.
Collapse
Affiliation(s)
- L D Berthold
- Diagnostische und Interventionelle Radiologie, Medizinische Hochschule Hannover, Deutschland.
| | | | | | | | | |
Collapse
|
25
|
Maiers M, Gragert L, Madbouly A, Steiner D, Marsh SGE, Gourraud PA, Oudshoorn M, van der Zanden H, Schmidt AH, Pingel J, Hofmann J, Müller C, Eberhard HP. 16(th) IHIW: global analysis of registry HLA haplotypes from 20 million individuals: report from the IHIW Registry Diversity Group. Int J Immunogenet 2012; 40:66-71. [PMID: 23280139 PMCID: PMC3561701 DOI: 10.1111/iji.12031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Revised: 11/10/2012] [Accepted: 11/12/2012] [Indexed: 12/23/2022]
Abstract
This project has the goal to validate bioinformatics methods and tools for HLA haplotype frequency analysis specifically addressing unique issues of haematopoietic stem cell registry data sets. In addition to generating new methods and tools for the analysis of registry data sets, the intent is to produce a comprehensive analysis of HLA data from 20 million donors from the Bone Marrow Donors Worldwide (BMDW) database. This report summarizes the activity on this project as of the 16IHIW meeting in Liverpool.
Collapse
Affiliation(s)
- M Maiers
- Bioinformatics Research, National Marrow Donor Program (NMDP), Minneapolis, MN, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Schmitt Z, Bauer R, Steiner D, Zimmer KP, Alzen G. Bildgebende Verfahren bei chronisch entzündlichen Darmerkrankungen (CEDE) in der Pädiatrie: Primärdiagnostik und Verlaufsbeurteilung. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
27
|
Affiliation(s)
- D Steiner
- Department of Cybernetics, Czech Technical University, Prague, Czech Republic.
| |
Collapse
|
28
|
Wedekind C, Gessner MO, Vazquez F, Maerki M, Steiner D. Elevated resource availability sufficient to turn opportunistic into virulent fish pathogens. Ecology 2010; 91:1251-6. [DOI: 10.1890/09-1067.1] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
29
|
Steiner D, Khaner H, Cohen M, Even-Ram S, Gil Y, Itsykson P, Turetsky T, Idelson M, Aizenman E, Ram R, Berman-Zaken Y, Reubinoff B. Derivation, propagation and controlled differentiation of human embryonic stem cells in suspension. Nat Biotechnol 2010; 28:361-4. [PMID: 20351691 DOI: 10.1038/nbt.1616] [Citation(s) in RCA: 163] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Accepted: 02/16/2010] [Indexed: 11/09/2022]
Abstract
Undifferentiated human embryonic stem cells (hESCs) are currently propagated on a relatively small scale as monolayer colonies. Culture of hESCs as floating aggregates is widely used for induction of differentiation into embryoid bodies. Here we show that hESC lines can be derived from floating inner cell masses in suspension culture conditions that do not involve feeder cells or microcarriers. This culture system supports prolonged propagation of the pluripotent stem cells as floating clusters without their differentiation into embryoid bodies. HESCs cultivated as aggregates in suspension maintain the expression of pluripotency markers and can differentiate into progeny of the three germ layers both in vitro and in vivo. We further show the controlled differentiation of hESC clusters in suspension into neural spheres. These results pave the way for large-scale expansion and controlled differentiation of hESCs in suspension, which would be valuable in basic and applied research.
Collapse
|
30
|
Yang H, Robinson SN, Lu J, Decker WK, Xing D, Steiner D, Parmar S, Shah N, Champlin RE, Munsell M, Leen A, Bollard C, Simmons PJ, Shpall EJ. CD3(+) and/or CD14(+) depletion from cord blood mononuclear cells before ex vivo expansion culture improves total nucleated cell and CD34(+) cell yields. Bone Marrow Transplant 2009; 45:1000-7. [PMID: 19838220 DOI: 10.1038/bmt.2009.289] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cord blood (CB) is used increasingly in transplant patients lacking sibling or unrelated donors. A major hurdle in the use of CB is its low cell dose, which is largely responsible for an elevated risk of graft failure and a significantly delayed neutrophil and platelet engraftment. As a positive correlation has been shown between the total nucleated cell (TNC) and CD34(+) cell dose transplanted and time to neutrophil and platelet engraftment, strategies to increase these measures are under development. One strategy includes the ex vivo expansion of CB mononuclear cells (MNC) with MSC in a cytokine cocktail. We show that this strategy can be further improved if CD3(+) and/or CD14(+) cells are first depleted from the CB MNC before ex vivo expansion. Ready translation of this depletion strategy to improve ex vivo CB expansion in the clinic is feasible as clinical-grade devices and reagents are available. Ultimately, the aim of improving TNC and CD34(+) transplant doses is to further improve the rate of neutrophil and platelet engraftment in CB recipients.
Collapse
Affiliation(s)
- H Yang
- Department of Stem Cell Transplantation and Cellular Therapy, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Yang H, Robinson S, Decker W, Xing D, Steiner D, Lu , de Lima M.J. J, Champlin R, Simmons P, Shpall E. Depletion of CD3+ and/or CD14+ Cells From Cord Blood Improves Ex Vivo Expansion. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
32
|
Decker W, Li S, Xing D, Robinson S, Yang H, Steiner D, Lapushin R, Ramsay A, Hosing C, Gribben J, Keating M, Shpall E, Wierda W. Generation Of CLL-Specific CTL Effectors From Partially HLA-Matched Umbilical Cord Blood Grafts Using CD154-Transduced CLL Cell S As APCs. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
33
|
Decker W, Li S, Xing D, Robinson S, Yang H, Steiner D, Shpall E, Bollard C, Safdar A. Generation of HLA-Restricted T-Lymphocyte Responses Against Recombinant Influenzavirus Hemagglutinin A/New Caledonia by an In Vitro Umbilical Cord Blood Model of Dendritic Cell Vaccination. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
34
|
Klett R, Steiner D, Laurich S, Bauer R, Kordelle J. Evaluation of aseptic loosening of knee prostheses by quantitative bone scintigraphy. Nuklearmedizin 2008; 47:163-6. [PMID: 18690376 DOI: 10.3413/nukmed-0123] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
UNLABELLED In not infected knee prostheses bone scintigraphy is a possible method to diagnose mechanical loosening, and therefore, to affect treatment regimes in symptomatic patients. However, hitherto studies showed controversial results for the reliability of bone scintigraphy in diagnosing loosened knee prostheses by using asymptomatic control groups. Therefore, the AIM of our study was to optimize the interpretation procedure and to evaluate the accuracy using results from revision surgery as standard. METHODS Retrospectively, we were able to examine the tibial component in 31 cemented prostheses. In this prostheses infection was excluded by histological or bacteriological examination during revision surgery. To quantify bone scintigraphy, we used medial and lateral tibial regions with a reference region from the contralateral femur. RESULTS To differentiate between loosened and intact prostheses we found a threshold of 5.0 for the maximum tibia to femur ratio of the both tibial regions and a threshold of 18% for the difference of the ratio of both tibial regions. Using these thresholds, values of 0.9, 1, 0.85, 1, and 0.94 were calculated for sensitivity, specificity, negative predictive value, positive predictive value, and accuracy, respectively. To get a sensitivity of 1, we found a lower threshold of 3.3 for the maximum tibia to femur ratio. CONCLUSION Quantitative bone scintigraphy appears to be a reliable diagnostic tool for aseptic loosening of knee prostheses with thresholds evaluated by revision surgery results being the golden standard.
Collapse
Affiliation(s)
- R Klett
- Clinic of Nuclear Medicine, University Hospital Giessen and Marburg, Friedrichstrasse 25, Giessen, Germany.
| | | | | | | | | |
Collapse
|
35
|
Schallmach E, Steiner D, Vogel Z. Inhibition of AC-II activity following chronic agonist exposure is modulated by phosphorylation. J Mol Neurosci 2007; 29:115-22. [PMID: 16954601 DOI: 10.1385/jmn:29:2:115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2005] [Revised: 11/30/1999] [Accepted: 02/03/2006] [Indexed: 11/11/2022]
Abstract
Chronic exposure to opiate agonists (followed by agonist withdrawal) leads to a large increase in the activity of adenylyl cyclase (AC) isozymes I, V, VI, and VIII, a phenomenon defined as AC superactivation (or supersensitization). On the other hand, AC isozymes belonging to the AC-II family (AC-II, AC-IV, and AC-VII) show decreased activity, referred to as superinhibition. Using COS-7 cells transiently transfected with mu-opioid receptor and AC-II, we show here that inhibition of PKC and tyrosine kinase activities synergistically reduced the level of AC-II superinhibition. Moreover, inhibitor of Raf-1 kinase also led to a decrease in AC-II superinhibition. These data suggest that Raf-1, activated by PKC and tyrosine kinase, has a role in the regulation of AC-II superinhibition.
Collapse
Affiliation(s)
- Ester Schallmach
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | | | | |
Collapse
|
36
|
Schallmach E, Steiner D, Vogel Z. Adenylyl cyclase type II activity is regulated by two different mechanisms: implications for acute and chronic opioid exposure. Neuropharmacology 2006; 50:998-1005. [PMID: 16545401 DOI: 10.1016/j.neuropharm.2006.01.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2005] [Revised: 01/02/2006] [Accepted: 01/25/2006] [Indexed: 11/16/2022]
Abstract
Acute and chronic activation of opioid receptors differentially regulate the activity of the various adenylyl cyclase (AC) isoforms. In several AC isoforms (I, V, VI and VIII) acute opioid activation (by agonists such as morphine) leads to AC inhibition, while prolonged opioid activation leads to increase in AC activity, a phenomenon known as AC sensitization or superactivation. In several other AC isoforms (II, IV and VII), acute opioid activation leads to AC stimulation, while chronic opioid exposure inhibits AC activity, in a process, which in analogy to the term "superactivation" is referred to as "superinhibition". AC-II is highly regulated by multiple and independent biochemical stimuli, including Gbetagamma, Galphas and PKC activation. We investigated the regulation of AC-II by Galphas and by PKC under conditions of acute and chronic exposure to opioid agonists in COS-7 transfected cells. We found that acute opioid exposure led to an increase in AC-II activity by either Galphas or PKC stimulation. This effect seems to be regulated by Gbetagamma subunits, in both activation pathways, as the increase in AC-II activity was abolished by pertussis toxin treatment and by Gbetagamma scavengers. On the other hand, while chronic opioid exposure led to a decrease in AC-II activity ("superinhibition") upon stimulation of the Galphas pathway, this superinhibition was not observed when the opioid treated cells were stimulated via PKC activation.
Collapse
Affiliation(s)
- Ester Schallmach
- Department of Neurobiology, The Weizmann Institute of Science, Hertzel str, Rehovot 76100, Israel
| | | | | |
Collapse
|
37
|
Klett R, Puille M, Steiner D, Bauer R. [Radiation synovectomy of the knee joint: Evaluation of bremsstrahlung-detection by using a corpse phantom]. Nuklearmedizin 2006; 45:57-61. [PMID: 16493515 DOI: 10.1267/nukl06010057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
AIM Multiple procedures for the quantification of activity leakage in radiation synovectomy of the knee joint have been described in the literature. We compared these procedures considering the real conditions of dispersion and absorption using a corpse phantom. METHODS We simulated different distributions of the activity in the knee joint and a different extra-articular spread into the inguinal lymph nodes. The activity was measured with a gamma-camera. Activity leakage was calculated by measuring the retention in the knee joint only using an anterior view, using the geometric mean of anterior and posterior views, or using the sum of anterior and posterior views. The same procedures were used to quantify the activity leakage by measuring the activity spread into the inguinal lymph nodes. In addition, the influence of scattered rays was evaluated. RESULTS For several procedures we found an excellent association with the real activity leakage, shown by an r(2) between 0.97 and 0.98. When the real value of the leakage is needed, e. g. in dosimetric studies, simultaneously measuring of knee activity and activity in the inguinal lymph nodes in anterior and posterior views and calculation of the geometric mean with exclusion of the scatter rays was found to be the procedure of choice. CONCLUSION When measuring of activity leakage is used for dosimetric calculations, the above-described procedure should be used. When the real value of the leakage is not necessary, e. g. for comparing different therapeutic modalities, several of the procedures can be considered as being equivalent.
Collapse
Affiliation(s)
- R Klett
- Klinik für Nuklearmedizin, Universitätsklinikum Giessen und Marburg, Friedrichstrasse 25, 35385 Giessen.
| | | | | | | |
Collapse
|
38
|
Puille M, Steiner D, Bauer R, Klett R. Radiation synovectomy of the knee joint. Nuklearmedizin 2006. [DOI: 10.1055/s-0038-1623935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Aim: Multiple procedures for the quantification of activity leakage in radiation synovectomy of the knee joint have been described in the literature. We compared these procedures considering the real conditions of dispersion and absorption using a corpse phantom. Methods: We simulated different distributions of the activity in the knee joint and a different extra-articular spread into the inguinal lymph nodes. The activity was measured with a gammacamera. Activity leakage was calculated by measuring the retention in the knee joint only using an anterior view, using the geometric mean of anterior and posterior views, or using the sum of anterior and posterior views. The same procedures were used to quantify the activity leakage by measuring the activity spread into the inguinal lymph nodes. In addition, the influence of scattered rays was evaluated. Results: For several procedures we found an excellent association with the real activity leakage, shown by an r² between 0.97 and 0.98. When the real value of the leakage is needed, e. g. in dosimetric studies, simultaneously measuring of knee activity and activity in the inguinal lymph nodes in anterior and posterior views and calculation of the geometric mean with exclusion of the scatter rays was found to be the procedure of choice. Conclusion: When measuring of activity leakage is used for dosimetric calculations, the above-described procedure should be used. When the real value of the leakage is not necessary, e. g. for comparing different therapeutic modalities, several of the procedures can be considered as being equivalent.
Collapse
|
39
|
Steiner D, Mokari T, Banin U, Millo O. Electronic structure of metal-semiconductor nanojunctions in gold CdSe nanodumbbells. Phys Rev Lett 2005; 95:056805. [PMID: 16090904 DOI: 10.1103/physrevlett.95.056805] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2005] [Indexed: 05/03/2023]
Abstract
The electronic properties of metal-semiconductor nanojunctions are investigated by scanning tunneling spectroscopy of gold-tipped CdSe rods. A gap similar to that in bare CdSe nanorods is observed near the nanodumbbell center, while subgap structure emerges near the metal-semiconductor nanocontact. This behavior is attributed to the formation of subgap interface states that vanish rapidly towards the center of the rod, consistent with theoretical predictions. These states lead also to modified Coulomb staircase, and in some cases to negative differential conductance, on the gold tips.
Collapse
Affiliation(s)
- D Steiner
- Racah Institute of Physics, and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | | | | | | |
Collapse
|
40
|
Steiner D, Saya D, Schallmach E, Simonds WF, Vogel Z. Adenylyl cyclase type-VIII activity is regulated by G(betagamma) subunits. Cell Signal 2005; 18:62-8. [PMID: 15925485 DOI: 10.1016/j.cellsig.2005.03.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2005] [Accepted: 03/15/2005] [Indexed: 10/25/2022]
Abstract
The Ca2+-activated adenylyl cyclase type VIII (AC-VIII) has been implicated in several forms of neural plasticity, including drug addiction and learning and memory. It has not been clear whether Gi/o proteins and G-protein coupled receptors regulate the activity of AC-VIII. Here we show in intact mammalian cell system that AC-VIII is inhibited by mu-opioid receptor activation and that this inhibition is pertussis toxin sensitive. Moreover, we show that G(betagamma) subunits inhibit AC-VIII activity, while constitutively active alphai/o subunits do not. Different Gbeta isoforms varied in their efficacies, with Gbeta1gamma2 or Gbeta2gamma2 being more efficient than Gbeta3gamma2 and Gbeta4gamma2, while Gbeta5 (transfected with gamma2) had no effect. As for the Ggamma subunits, Gbeta1 inhibited AC-VIII activity in the presence of all gamma subunits tested except for gamma5 that had only a marginal activity. Moreover, cotransfection with proteins known to serve as scavengers of Gbetagamma dimers, or to reduce Gbetagamma plasma membrane anchorage, markedly attenuated the mu-opioid receptor-induced inhibition of AC-VIII. These results demonstrate that Gbetagamma (originating from agonist activation of these receptors) and probably not Galphai/o subunits are involved in the agonist inhibition of AC-VIII.
Collapse
Affiliation(s)
- Debora Steiner
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot 76100, Israel
| | | | | | | | | |
Collapse
|
41
|
Steiner D, Jeggli S, Tschopp A, Bernard A, Oppliger A, Hilfiker S, Hotz P. Clara cell protein and surfactant protein�B in garbage collectors and in wastewater workers exposed to bioaerosols. Int Arch Occup Environ Health 2005; 78:189-97. [PMID: 15772810 DOI: 10.1007/s00420-004-0586-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2004] [Accepted: 10/02/2004] [Indexed: 01/17/2023]
Abstract
OBJECTIVES Inhalation of bioaerosols has been hypothesised to cause "toxic pneumonitis" that should increase lung epithelial permeability at the bronchioloalveolar level. Serum Clara cell protein (CC16) and serum surfactant protein B (SPB) have been proposed as sensitive markers of lung epithelial injury. This study was aimed at looking for increased lung epithelial permeability by determining CC16 and SPB in workers exposed to bioaerosols from wastewater or garbage. METHODS Subjects (778 wastewater, garbage and control workers; participation 61%) underwent a medical examination, lung function tests [American Thoracic Society (ATS) criteria], and determination of CC16 and SPB. Symptoms of endotoxin exposure and several potential confounders (age, gender, smoking, kidney function, obesity) were looked for. Results were examined with multiple linear or logistic regression. RESULTS Exposure to bioaerosols increased CC16 concentration in the wastewater workers. No effect of exposure on SPB was found. No clue to work-related respiratory diseases was found. CONCLUSIONS The increase in CC16 in serum supports the hypothesis that bioaerosols cause subclinical "toxic pneumonitis", even at low exposure.
Collapse
Affiliation(s)
- D Steiner
- Occupational and Environmental Medicine Unit, Sumatrastrasse 30, 8006, Zurich, Switzerland
| | | | | | | | | | | | | |
Collapse
|
42
|
Steiner D, Avidor-Reiss T, Schallmach E, Butovsky E, Lev N, Vogel Z. Regulation of adenylate cyclase type VIII splice variants by acute and chronic Gi/o-coupled receptor activation. Biochem J 2005; 386:341-8. [PMID: 15537392 PMCID: PMC1134799 DOI: 10.1042/bj20041670] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2004] [Revised: 11/03/2004] [Accepted: 11/10/2004] [Indexed: 11/17/2022]
Abstract
We previously reported that acute agonist activation of G(i/o)-coupled receptors inhibits adenylate cyclase (AC) type VIII activity, whereas agonist withdrawal following chronic activation of these receptors induces AC-VIII superactivation. Three splice variants of AC-VIII have been identified, which are called AC-VIII-A, -B and -C (with AC-VIII-B missing the glycosylation domain and AC-VIII-C lacking most of the C1b area). We report here that AC-VIII-A and -B, but not -C, are inhibited by acute mu-opioid and dopaminergic type D2 receptor activation, indicating that the C1b area of AC-VIII has an important role in AC inhibition by G(i/o)-coupled receptor activation. On the other hand the glycosylation sites in AC-VIII did not play a role in AC-VIII regulation. Although AC-VIII-A and -C differed in their capacity to be inhibited by acute agonist exposure, agonist withdrawal after prolonged treatment led to a similar superactivation of all three splice variants, with no significant change in AC-VIII expression. AC-VIII superactivation was not affected by pre-incubation with a cell permeable cAMP analogue, indicating that the superactivation does not depend on the agonist-induced reduction in cAMP levels. The superactivated AC-VIII-A, -B and -C were similarly re-inhibited by re-application of agonist (morphine or quinpirole), returning the activity to control levels. These results demonstrate marked differences in the agonist inhibition of the AC-VIII splice variants before, but not after, superactivation.
Collapse
Key Words
- adenylate cyclase type viii
- camp
- dopamine receptor
- g-protein-coupled receptor
- opiate receptor
- superactivation
- ac, adenylate cyclase
- cho, chinese-hamster ovary
- 8-cpt-camp, 8-(4-chlorophenylthio)-3′,5′-camp
- dmem, dulbecco's modified eagle's medium
- d2 receptor, dopaminergic type 2 receptor
- d2l receptor, long form of the d2 receptor
- fs, forskolin
- ibmx, isobutylmethylxanthine
- ptx, pertussis toxin
Collapse
Affiliation(s)
- Debora Steiner
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Tomer Avidor-Reiss
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Ester Schallmach
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Elena Butovsky
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Nirit Lev
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Zvi Vogel
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| |
Collapse
|
43
|
Steiner D, Avidor-Reiss T, Schallmach E, Saya D, Vogel Z. Inhibition and Superactivation of the Calcium-Stimulated Isoforms of Adenylyl Cyclase: Role of G βγ Dimers. J Mol Neurosci 2005; 27:195-203. [PMID: 16186630 DOI: 10.1385/jmn:27:2:195] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Accepted: 02/28/2005] [Indexed: 11/11/2022]
Abstract
It was shown previously that chronic exposure to opiate agonists increases adenylyl cyclase (AC) activity, a phenomenon termed AC superactivation (or supersensitization). More recently, we showed that acute Gi/o- coupled receptor activation inhibits the activity of several AC isozymes, including Ca2+/calmodulin-stimulated AC-I and -VIII, whereas chronic receptor activation induces their superactivation. Here, we report that both acute Mu-opioid receptor-induced inhibition and chronic induced superactivation of AC-I and -VIII are pertussis toxin sensitive. In addition, we show that proteins that interfere with the activity of Gbetagamma subunits (Gbetagamma scavengers) strongly attenuate the acute inhibition of AC-I and -VIII and the superactivation of AC-I, and abolish the superactivation of AC-VIII. Based on these results, we suggest that Gbetagamma is involved in the acute inhibition and chronic agonist-induced superactivation of AC types I and VIII.
Collapse
Affiliation(s)
- Debora Steiner
- Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | | | | | | | | |
Collapse
|
44
|
Coffey CS, Steiner D, Baker BA, Allison DB. A randomized double-blind placebo-controlled clinical trial of a product containing ephedrine, caffeine, and other ingredients from herbal sources for treatment of overweight and obesity in the absence of lifestyle treatment. Int J Obes (Lond) 2004; 28:1411-9. [PMID: 15356670 DOI: 10.1038/sj.ijo.0802784] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To evaluate the efficacy and side effects of an herbal formulation to promote weight loss, as compared to placebo. DESIGN 12-week multicenter double-blind, placebo-controlled, randomized parallel groups design. Study conducted at three clinical sites in New York State. Subjects were randomized to receive either the 'active' product or a 'placebo' supplement for 12 weeks. Minimal steps were taken to influence lifestyle changes with regard to diet or exercise. SUBJECTS 102 overweight/obese (30<BMI</=39.9 kg/m(2)) volunteers between the ages of 18 and 65 y. MAIN OUTCOME MEASURES Weight, percent body fat, fat mass, waist circumference, BMI, blood pressure, and pulse measured at 2 days, 1 week, 2 weeks, 4 weeks, 8 weeks, and 12 weeks postrandomization. RESULTS Subjects receiving the 'active' treatment experienced, on average, an additional 1.5 kg of weight loss compared with subjects receiving the placebo. In addition, subjects receiving the 'active' treatment experienced greater reductions in BMI and waist circumference over the 12-week period. No differences were observed with respect to percent body fat, fat mass, diastolic or systolic blood pressure, pulse, the occurrence of any adverse event, or the occurrence of any presumed treatment-related adverse event. Testing of the study product by two independent laboratories indicated that it had only approximately half of the intended amount of ephedrine alkaloids and caffeine. CONCLUSIONS Over the 12-week trial, subjects on the active treatment experienced significantly greater weight loss than subjects on placebo, without an increase in blood pressure, pulse, or the rate of adverse events. These benefits were achieved in the absence of any lifestyle treatment to change dietary or exercise behavior and with lower doses of ephedrine alkaloids and caffeine than those commonly utilized.
Collapse
Affiliation(s)
- C S Coffey
- Department of Biostatistics, University of Alabama at Birmingham, AL 35294-0022, USA
| | | | | | | |
Collapse
|
45
|
Jeggli S, Steiner D, Joller H, Tschopp A, Steffen R, Hotz P. Hepatitis E, Helicobacter pylori, and gastrointestinal symptoms in workers exposed to waste water. Occup Environ Med 2004; 61:622-7. [PMID: 15208379 PMCID: PMC1740808 DOI: 10.1136/oem.2003.011411] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Workers exposed to sewage may have an increased risk of infection by Helicobacter pylori and hepatitis E virus (HEV). AIMS To assess the prevalence of clinical hepatitis E (HE) and peptic ulcer disease as well as the seroprevalence of antibodies to H pylori and HEV in workers with and without sewage exposure and to look for symptoms due to exposure to endotoxin. METHODS In the first year of a prospective cohort study 349 sewage exposed workers and 429 municipal manual workers (participation: 61%) underwent a complete medical examination. Travelling to endemic areas, socioeconomic level, age, country in which childhood was spent, and number of siblings were considered as the main confounding factors. RESULTS Peptic ulcer disease and clinical HE did not occur more often in workers exposed to sewage. Prevalence of antibodies to HEV was 3.3% and overall prevalence of IgG antibodies to H pylori was 42% with large differences between subgroups. Logistic regression did not show an increased risk of seropositivity or antibodies to parietal cells in sewage exposed workers, but disentangling the effect of exposure from that of confounders was extremely difficult. No increase of symptoms due to exposure to endotoxin was found in sewage workers, with the exception of diarrhoea. CONCLUSIONS No clear increased risk of infection by H pylori or by HEV in workers exposed to sewage was found in this cross-sectional study, but these results need to be confirmed by follow up.
Collapse
Affiliation(s)
- S Jeggli
- Occupational and Environmental Medicine Unit, Zurich, Switzerland
| | | | | | | | | | | |
Collapse
|
46
|
Vincent M, Guz Y, Rozenberg M, Webb G, Furuta M, Steiner D, Teitelman G. Abrogation of protein convertase 2 activity results in delayed islet cell differentiation and maturation, increased alpha-cell proliferation, and islet neogenesis. Endocrinology 2003; 144:4061-9. [PMID: 12933680 DOI: 10.1210/en.2003-0088] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To date, the role of pancreatic hormones in pancreatic islet growth and differentiation is poorly understood. To address this issue, we examined mice with a disruption in the gene encoding prohormone convertase 2 (PC2). These mice are unable to process proglucagon, prosomatostatin, and other neuroendocrine precursors into mature hormones. Initiation of insulin (IN) expression during development was delayed in PC2 mutant mice. Cells containing IN were first detected in knockout embryos on d 15 of development, 5 d later than in wild-type littermates. However, the IN(+) cells of d 15 PC2 mutant mice coexpressed glucagon, as did the first appearing beta-cells of controls. In addition, lack of PC2 perturbed the pattern of expression of transcription factors presumed to be involved in the determination of the mature alpha-cell phenotype. Thus, in contrast to controls, alpha-cells of mutant mice had protracted expression of Nkx 6.1 and Pdx-1, but did not express Brn-4. Islets of adult mutant mice also contained cells coexpressing insulin and somatostatin, an immature cell type found only in islets of the wild-type strain during development. In addition to the effects on islet cell differentiation, the absence of PC2 activity resulted in a 3-fold increase in the rate of proliferation of proglucagon cells during the perinatal period. This increase contributed to the development of alpha-cell hyperplasia during postnatal life. Furthermore, the total beta-cell volume was increased 2-fold in adult mutants compared with controls. This increase was due to islet neogenesis, as the number of islets per section was significantly higher in knockout mice compared with wild-type mice, whereas both strains had similar rates of IN cell proliferation. These results indicate that hormones processed by PC2 affected processes that regulate islet cell differentiation and maturation in embryos and adults.
Collapse
Affiliation(s)
- M Vincent
- Department of Anatomy and Cell Biology, State University of New York, Brooklyn, New York 11203, USA
| | | | | | | | | | | | | |
Collapse
|
47
|
Stanciu IN, Pitale S, Prinz RA, Jakate S, Webb G, Steiner D, Braithwaite S, Gordon D, Emanuele MA. Insulinoma presenting with hyperandrogenism: a case report and a literature review. J Intern Med 2003; 253:484-9. [PMID: 12653879 DOI: 10.1046/j.1365-2796.2003.01132.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
An 18-year-old woman presented with a 6-month history of amenorrhoea and hyperandrogenism. Three months later she developed several episodes of fasting hypoglycaemia and was subsequently diagnosed with an insulinoma. Hyperinsulinaemia was observed in association with an elevated serum testosterone level. Surgical removal of the insulinoma resulted in resolution of the clinical and biochemical features of the polycystic ovarian syndrome (PCOS). Polycystic ovarian syndrome is unusual in a patient having an insulinoma. The rarity of this association may be the result of the late age of onset of this type of tumour, intermittent secretion of excessive insulin by the tumour, the degree of hyperinsulinism or other factors extrinsic to the insulin receptor that may facilitate insulin activity. However, we could not discover how our patient differs in having had PCOS from the majority of women with insulinoma who do not. If other patients with insulinoma are subsequently found to have hyperandrogenism, then this tumour might be added to the differential diagnosis of causes of anovulatory cycles and hyperandrogenaemia, although rare the association would be uncommon.
Collapse
Affiliation(s)
- I N Stanciu
- Department of Endocrinology and Metabolism, Loyola University Medical Center and Hines VA Hospital, Maywood, IL, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Steiner D, Jeggli S, Bernard A, Hotz P. [Lung diseases in persons exposed to waste disposal dust]. Praxis (Bern 1994) 2003; 92:436-440. [PMID: 12674586 DOI: 10.1024/0369-8394.92.10.436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The current cohort study in the canton of Zurich is investigating respiratory diseases in waste collectors. Therefore, a clinical history was taken and lung function tests and measurement of the Clara cell protein concentration were carried out. The first results show no elevation of the prevalence of asthma or other lung diseases in waste collectors. Compared with control subjects, waste collectors have a lower forced expiratory volume in the first second and a higher mean Clara cell protein concentration. The prevalence of cardiovascular risk factors such as smoking, obesity and arterial hypertension which are not caused by the occupation is high. Indeed, about 50% of all participants are hypertensive.
Collapse
Affiliation(s)
- D Steiner
- Abteilung für Arbeits- und Umweltmedizin des Institutes für Sozial- und Präventivmedizin und der medizinischen Poliklinik, Zürich.
| | | | | | | |
Collapse
|
49
|
Abstract
Hepatitis E virus (HEV) is found in waste water which represents a route of infection. However, the risk for sewage workers is unknown. Thus, we aimed at determining the prevalence of anti-HEV antibodies in sewage workers from the Canton of Zurich. The anti-HEV antibodies evaluated in 288 subjects with exposure to sewage and 306 controls, a total of 594 subjects. Overall, twenty-two (3.7%) subjects had anti-HEV, the seroprevalence was similar in those exposed and controls. The most important risk factor, travelling in endemic areas, was lacking in two workers, who both were exposed to sewage. A follow up study in the population will soon give further evidence on the incidence rate.
Collapse
Affiliation(s)
- S Jeggli
- Abteilung für Arbeits- und Umweltmedizin, Abteilung für Epidemiologie und Prävention übertragbarer Krankheiten und Abteilung für klinische Immunologie.
| | | | | | | | | |
Collapse
|
50
|
Klett R, Khalisi A, Haas H, Puille M, Steiner D, Stürz H, Bauer R. [Staged diagnosis of septic hip endoprosthesis loosening with laboratory parameters and antigranulocyte scintigraphy]. Z Orthop Ihre Grenzgeb 2001; 139:415-9. [PMID: 11605293 DOI: 10.1055/s-2001-17984] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AIM The value of serial diagnosis of septic loosening of hip endoprosthesis using laboratory parameters and antigranulocytes scintigraphy was investigated and compared to joint aspiration. METHOD In 35 patients with intraoperative verification of infection, we calculated sensitivity, specify and prevalence dependent positive and negative predictive values for antigranulocyte scintigraphy, laboratory tests and the most suitable combination of both. We also calculated predictive values of joint aspiration using sensitivity and specify values given in the literature. RESULTS From negative and positive predictive values, of the sedimetation rate and leukocyte count provided no increase of information. We found the same result for positive predictive values of C-reactive protein. For antigranulocyte scintigraphy alone, we found a distinct but still unsatisfying increase of information. Nevertheless, in both cases infection could be excluded definitely. Therefore, the combination of C-reactive protein and antigranulocyte scintigraphy was suitable and the positive predictive values of this combination were only about 5% lower than those of joint aspiration. But with joint aspiration, infection could not be excluded. CONCLUSION A positive result in serial diagnosis using C-reactive protein and antigranulocyte scintigraphy leads to an distinct increase in the probability of infection which is comparable to that of joint aspiration. The additional advantages of this procedure are the certain exclusion of infection and the absence of invasiveness.
Collapse
Affiliation(s)
- R Klett
- Klinik für Nuklearmedizin, Universitätsklinikum Giessen.
| | | | | | | | | | | | | |
Collapse
|