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Triolo TM, Fouts A, Pyle L, Yu L, Gottlieb PA, Steck AK, Greenbaum CJ, Atkinson M, Baidal D, Battaglia M, Becker D, Bingley P, Bosi E, Buckner J, Clements M, Colman P, DiMeglio L, Gitelman S, Goland R, Gottlieb P, Herold K, Knip M, Krischer J, Lernmark A, Moore W, Moran A, Muir A, Palmer J, Peakman M, Philipson L, Raskin P, Redondo M, Rodriguez H, Russell W, Spain L, Schatz D, Sosenko J, Wentworth J, Wherrett D, Wilson D, Winter W, Ziegler A, Anderson M, Antinozzi P, Benoist C, Blum J, Bourcier K, Chase P, Clare-Salzler M, Clynes R, Eisenbarth G, Fathman C, Grave G, Hering B, Insel R, Kaufman F, Kay T, Leschek E, Mahon J, Marks J, Nanto-Salonen K, Nepom G, Orban T, Parkman R, Pescovitz M, Peyman J, Pugliese A, Roep B, Roncarolo M, Savage P, Simell O, Sherwin R, Siegelman M, Skyler J, Steck A, Thomas J, Trucco M, Wagner J, Krischer JP, Leschek E, Rafkin L, Bourcier K, Cowie C, Foulkes M, Insel R, Krause-Steinrauf H, Lachin JM, Malozowski S, Peyman J, Ridge J, Savage P, Skyler JS, Zafonte SJ, Rafkin L, Sosenko JM, Kenyon NS, Santiago I, Krischer JP, Bundy B, Abbondondolo M, Dixit S, Pasha M, King K, Adcock H, Atterberry L, Fox K, Englert N, Mauras J, Permuy K, Sikes T, Adams T, Berhe B, Guendling L, McLennan L, Paganessi C, Murphy M, Draznin M, Kamboj S, Sheppard V, Lewis L, Coates W, Amado D, Moore G, Babar J, Bedard D, Brenson-Hughes J, Cernich M, Clements R, Duprau S, Goodman L, Hester L, Huerta-Saenz A, Asif I, Karmazin T, Letjen S, Raman D, Morin W, Bestermann E, Morawski J, White A, Brockmyer R, Bays S, Campbell A, Boonstra M, Stapleton N, Stone A, Donoho H, Everett H, Hensley M, Johnson C, Marshall N, Skirvin P, Taylor R, Williams L, Burroughs C, Ray C, Wolverton D, Nickels C, Dothard P, Speiser M, Pellizzari L, Bokor K, Izuora S, Abdelnour P, Cummings S, Cuthbertson D, Paynor M, Leahy M, Riedl S, Shockley R, Saad T, Briones S, Casella C, Herz K, Walsh J, Greening F, Deemer M, Hay S, Hunt N, Sikotra L, Simons D, Karounos R, Oremus L, Dye L, Myers D, 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A, Eisenbarth G, Fain P, Fiallo-Scharer R, Frank N, Goettle H, Haarhues M, Harris S, Horton L, Hutton J, Jeffrrey J, Jenison R, Jones K, Kastelic W, King MA, Lehr D, Lungaro J, Mason K, Maurer H, Nguyen L, Proto A, Realsen J, Schmitt K, Schwartz M, Skovgaard S, Smith J, Vanderwel B, Voelmle M, Wagner R, Wallace A, Walravens P, Weiner L, Westerhoff B, Westfall E, Widmer K, Wright H, Schatz D, Abraham A, Atkinson M, Cintron M, Clare-Salzler M, Ferguson J, Haller M, Hosford J, Mancini D, Rohrs H, Silverstein J, Thomas J, Winter W, Cole G, Cook R, Coy R, Hicks E, Lewis N, Marks J, Pugliese A, Blaschke C, Matheson D, Pugliese A, Sanders-Branca N, Ray Arce LA, Cisneros M, Sabbag S, Moran A, Gibson C, Fife B, Hering B, Kwong C, Leschyshyn J, Nathan B, Pappenfus B, Street A, Boes MA, Peterson Eck S, Finney L, Albright Fischer T, Martin A, Jacqueline Muzamhindo C, Rhodes M, Smith J, Wagner J, Wood B, Becker D, Delallo K, Diaz A, Elnyczky B, Libman I, Pasek B, Riley K, Trucco M, Copemen B, Gwynn 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Manning G, Hendry B, Taylor S, Jones W, Strader M, Bencomo T, Bailey L, Bedolla C, Roldan C, Moudiotis B, Vaidya C, Anning S, Bunce S, Estcourt E, Folland E, Gordon C, Harrill J, Ireland J, Piper L, Scaife K, Sutton S, Wilkins M, Costelloe J, Palmer L, Casas C, Miller M, Burgard C, Erickson J, Hallanger-Johnson P, Clark W, Taylor A, Lafferty S, Gillett C, Nolan M, Pathak L, Sondrol T, Hjelle S, Hafner J, Kotrba R, Hendrickson A, Cemeroglu T, Symington M, Daniel Y, Appiagyei-Dankah D, Postellon M, Racine L, Kleis K, Barnes S, Godwin H, McCullough K, Shaheen G, Buck L, Noel M, Warren S, Weber S, Parker I, Gillespie B, Nelson C, Frost J, Amrhein E, Moreland A, Hayes J, Peggram J, Aisenberg M, Riordan J, Zasa E, Cummings K, Scott T, Pinto A, Mokashi K, McAssey E, Helden P, Hammond L, Dinning S, Rahman S, Ray C, Dimicri S, Guppy H, Nielsen C, Vogel C, Ariza L, Morales Y, Chang R, Gabbay L, Ambrocio L, Manley R, Nemery W, Charlton P, Smith L, Kerr B, Steindel-Kopp M, Alamaguer D, Liljenquist G, Browning T, Coughenour M, Sulk E, Tsalikan M, Tansey J, Cabbage N. Identical and Nonidentical Twins: Risk and Factors Involved in Development of Islet Autoimmunity and Type 1 Diabetes. Diabetes Care 2019; 42:192-199. [PMID: 30061316 PMCID: PMC6341285 DOI: 10.2337/dc18-0288] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/28/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE There are variable reports of risk of concordance for progression to islet autoantibodies and type 1 diabetes in identical twins after one twin is diagnosed. We examined development of positive autoantibodies and type 1 diabetes and the effects of genetic factors and common environment on autoantibody positivity in identical twins, nonidentical twins, and full siblings. RESEARCH DESIGN AND METHODS Subjects from the TrialNet Pathway to Prevention Study (N = 48,026) were screened from 2004 to 2015 for islet autoantibodies (GAD antibody [GADA], insulinoma-associated antigen 2 [IA-2A], and autoantibodies against insulin [IAA]). Of these subjects, 17,226 (157 identical twins, 283 nonidentical twins, and 16,786 full siblings) were followed for autoantibody positivity or type 1 diabetes for a median of 2.1 years. RESULTS At screening, identical twins were more likely to have positive GADA, IA-2A, and IAA than nonidentical twins or full siblings (all P < 0.0001). Younger age, male sex, and genetic factors were significant factors for expression of IA-2A, IAA, one or more positive autoantibodies, and two or more positive autoantibodies (all P ≤ 0.03). Initially autoantibody-positive identical twins had a 69% risk of diabetes by 3 years compared with 1.5% for initially autoantibody-negative identical twins. In nonidentical twins, type 1 diabetes risk by 3 years was 72% for initially multiple autoantibody-positive, 13% for single autoantibody-positive, and 0% for initially autoantibody-negative nonidentical twins. Full siblings had a 3-year type 1 diabetes risk of 47% for multiple autoantibody-positive, 12% for single autoantibody-positive, and 0.5% for initially autoantibody-negative subjects. CONCLUSIONS Risk of type 1 diabetes at 3 years is high for initially multiple and single autoantibody-positive identical twins and multiple autoantibody-positive nonidentical twins. Genetic predisposition, age, and male sex are significant risk factors for development of positive autoantibodies in twins.
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Affiliation(s)
- Taylor M. Triolo
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Alexandra Fouts
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Laura Pyle
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Liping Yu
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Peter A. Gottlieb
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Andrea K. Steck
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
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Haller MJ, Schatz DA, Skyler JS, Krischer JP, Bundy BN, Miller JL, Atkinson MA, Becker DJ, Baidal D, DiMeglio LA, Gitelman SE, Goland R, Gottlieb PA, Herold KC, Marks JB, Moran A, Rodriguez H, Russell W, Wilson DM, Greenbaum CJ, Greenbaum C, Atkinson M, Baidal D, Battaglia M, Becker D, Bingley P, Bosi E, Buckner J, Clements M, Colman P, DiMeglio L, Evans-Molina C, Gitelman S, Goland R, Gottlieb P, Herold K, Knip M, Krischer J, Lernmark A, Moore W, Moran A, Muir A, Palmer J, Peakman M, Philipson L, Raskin P, Redondo M, Rodriguez H, Russell W, Spain L, Schatz D, Sosenko J, Wherrett D, Wilson D, Winter W, Ziegler A, Anderson M, Antinozzi P, Benoist C, Blum J, Bourcier K, Chase P, Clare-Salzler M, Clynes R, Cowie C, Eisenbarth G, Fathman C, Grave G, Harrison L, Hering B, Insel R, Jordan S, Kaufman F, Kay T, Kenyon N, Klines R, Lachin J, Leschek E, Mahon J, Marks J, Monzavi R, Nanto-Salonen K, Nepom G, Orban T, Parkman R, Pescovitz M, Peyman J, Pugliese A, Ridge J, Roep B, Roncarolo M, Savage P, Simell O, Sherwin R, Siegelman M, Skyler J, Steck A, Thomas J, Trucco M, Wagner J, Bourcier K, Greenbaum CJ, Krischer JP, Leschek E, Rafkin L, Spain L, Cowie C, Foulkes M, Insel R, Krause-Steinrauf H, Lachin JM, Malozowski S, Peyman J, Ridge J, Savage P, Skyler JS, Zafonte SJ, Greenbaum CJ, Rafkin L, Sosenko JM, Skyler JS, Kenyon NS, Santiago I, Krischer JP, Bundy B, Abbondondolo M, Adams T, Amado D, Asif I, Boonstra M, Boulware D, Bundy B, Burroughs C, Cuthbertson D, Eberhard C, Fiske S, Ford J, Garmeson J, Guillette H, Geyer S, Hays B, Henderson C, Henry M, Heyman K, Hsiao B, Karges C, Kinderman A, Lane L, Leinbach A, Liu S, Lloyd J, Malloy J, Maddox K, Martin J, Miller J, Moore M, Muller S, Nguyen T, O’Donnell R, Parker M, Pereyra M, Reed N, Roberts A, Sadler K, Stavros T, Tamura R, Wood K, Xu P, Young K, Alies P, Badias F, Baker A, Bassi M, Beam C, Boulware D, Bounmananh L, Bream S, Deemer M, Freeman D, Gough J, Ginem J, Granger M, Holloway M, Kieffer M, Lane P, Law P, Linton C, Nallamshetty L, Oduah V, Parrimon Y, Paulus K, Pilger J, Ramiro J, Luvon AQ, Ritzie A, Sharma A, Shor X, Song A, Terry J, Weinberger M, Wootten J, Fradkin E, Leschek L, Spain C, Cowie S, Malozowski P, Savage G, Beck E, Blumberg R, Gubitosi-Klug L, Laffel R, Veatch D, Wallace J, Braun D, Brillon A, Lernmark B, Lo H, Mitchell A, Naji J, Nerup T, Orchard M, Steffes A, Tsiatis B, Zinman B, Loechelt L, Baden M, Green A, Weinberg S, Marcovina JP, Palmer A, Weinberg L, Yu W, Winter GS, Eisenbarth A, Shultz E, Batts K, Fitzpatrick M, Ramey R, Guerra C, Webb M, Romasco C, Greenbaum S, Lord D, VanBuecken W, Hao M, McCulloch D, Hefty K, Varner R, Goland E, Greenberg S, Pollack B, Nelson L, Looper L, DiMeglio M, Spall C, Evans-Molina M, Mantravadi J, Sanchez M, Mullen V, Patrick S, Woerner DM, Wilson T, Aye T, Esrey K, Barahona B, Baker H, Bitar C, Ghodrat M, Hamilton SE, Gitelman CT, Ferrara S, Sanda R, Wesch C, Torok P, Gottlieb J, Lykens C, Brill A, Michels A, Schauwecker MJ, Haller DA, Schatz MA, Atkinson LM, Jacobsen M, Cintron TM, Brusko CH, Wasserfall CE, Mathews JS, Skyler JM, Marks D, Baidal C, Blaschke D, Matheson A, Moran B, Nathan A, Street J, Leschyshyn B, Pappenfus B, Nelson N, Flaherty D, Becker K, Delallo D, Groscost K, Riley H, Rodriguez D, Henson E, Eyth W, Russell A, Brown F, Brendall K, Herold, Feldman L. Low-Dose Anti-Thymocyte Globulin (ATG) Preserves β-Cell Function and Improves HbA 1c in New-Onset Type 1 Diabetes. Diabetes Care 2018; 41:1917-1925. [PMID: 30012675 PMCID: PMC6105329 DOI: 10.2337/dc18-0494] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 06/12/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE A pilot study suggested that combination therapy with low-dose anti-thymocyte globulin (ATG) and pegylated granulocyte colony-stimulating factor (GCSF) preserves C-peptide in established type 1 diabetes (T1D) (duration 4 months to 2 years). We hypothesized that 1) low-dose ATG/GCSF or 2) low-dose ATG alone would slow the decline of β-cell function in patients with new-onset T1D (duration <100 days). RESEARCH DESIGN AND METHODS A three-arm, randomized, double-masked, placebo-controlled trial was performed by the Type 1 Diabetes TrialNet Study Group in 89 subjects: 29 subjects randomized to ATG (2.5 mg/kg intravenously) followed by pegylated GCSF (6 mg subcutaneously every 2 weeks for 6 doses), 29 to ATG alone (2.5 mg/kg), and 31 to placebo. The primary end point was mean area under the curve (AUC) C-peptide during a 2-h mixed-meal tolerance test 1 year after initiation of therapy. Significance was defined as one-sided P value < 0.025. RESULTS The 1-year mean AUC C-peptide was significantly higher in subjects treated with ATG (0.646 nmol/L) versus placebo (0.406 nmol/L) (P = 0.0003) but not in those treated with ATG/GCSF (0.528 nmol/L) versus placebo (P = 0.031). HbA1c was significantly reduced at 1 year in subjects treated with ATG and ATG/GCSF, P = 0.002 and 0.011, respectively. CONCLUSIONS Low-dose ATG slowed decline of C-peptide and reduced HbA1c in new-onset T1D. Addition of GCSF did not enhance C-peptide preservation afforded by low-dose ATG. Future studies should be considered to determine whether low-dose ATG alone or in combination with other agents may prevent or delay the onset of the disease.
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Affiliation(s)
| | | | - Jay S. Skyler
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL
| | | | | | | | | | | | - David Baidal
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL
| | | | | | | | - Peter A. Gottlieb
- University of Colorado Barbara Davis Center for Childhood Diabetes, Aurora, CO
| | | | - Jennifer B. Marks
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, FL
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Redondo MJ, Geyer S, Steck AK, Sharp S, Wentworth JM, Weedon MN, Antinozzi P, Sosenko J, Atkinson M, Pugliese A, Oram RA, Antinozzi P, Atkinson M, Battaglia M, Becker D, Bingley P, Bosi E, Buckner J, Colman P, Gottlieb P, Herold K, Insel R, Kay T, Knip M, Marks J, Moran A, Palmer J, Peakman M, Philipson L, Pugliese A, Raskin P, Rodriguez H, Roep B, Russell W, Schatz D, Wherrett D, Wilson D, Winter W, Ziegler A, Benoist C, Blum J, Chase P, Clare-Salzler M, Clynes R, Eisenbarth G, Fathman C, Grave G, Hering B, Kaufman F, Leschek E, Mahon J, Nanto-Salonen K, Nepom G, Orban T, Parkman R, Pescovitz M, Peyman J, Roncarolo M, Simell O, Sherwin R, Siegelman M, Steck A, Thomas J, Trucco M, Wagner J, Greenbaum ,CJ, Bourcier K, Insel R, Krischer JP, Leschek E, Rafkin L, Spain L, Cowie C, Foulkes M, Krause-Steinrauf H, Lachin JM, Malozowski S, Peyman J, Ridge J, Savage P, Skyler JS, Zafonte SJ, Kenyon NS, Santiago I, Sosenko JM, Bundy B, Abbondondolo M, Adams T, Amado D, Asif I, Boonstra M, Bundy B, Burroughs C, Cuthbertson D, Deemer M, Eberhard C, Fiske S, Ford J, Garmeson J, Guillette H, Browning G, Coughenour T, Sulk M, Tsalikan E, Tansey M, Cabbage J, Dixit N, Pasha S, King M, Adcock K, Geyer S, Atterberry H, Fox L, Englert K, Mauras N, Permuy J, Sikes K, Berhe T, Guendling B, McLennan L, Paganessi L, Hays B, Murphy C, Draznin M, Kamboj M, Sheppard S, Lewis V, Coates L, Moore W, Babar G, Bedard J, Brenson-Hughes D, Henderson C, Cernich J, Clements M, Duprau R, Goodman S, Hester L, Huerta-Saenz L, Karmazin A, Letjen T, Raman S, Morin D, Henry M, Bestermann W, Morawski E, White J, Brockmyer A, Bays R, Campbell S, Stapleton A, Stone N, Donoho A, Everett H, Heyman K, Hensley H, Johnson M, Marshall C, Skirvin N, Taylor P, Williams R, Ray L, Wolverton C, Nickels D, Dothard C, Hsiao B, Speiser P, Pellizzari M, Bokor L, Izuora K, Abdelnour S, Cummings P, Paynor S, Leahy M, Riedl M, Shockley S, Karges C, Saad R, Briones T, Casella S, Herz C, Walsh K, Greening J, Hay F, Hunt S, Sikotra N, Simons L, Keaton N, Karounos D, Oremus R, Dye L, Myers L, Ballard D, Miers W, Sparks R, Thraikill K, Edwards K, Fowlkes J, Kinderman A, Kemp S, Morales A, Holland L, Johnson L, Paul P, Ghatak A, Phelen K, Leyland H, Henderson T, Brenner D, Law P, Oppenheimer E, Mamkin I, Moniz C, Clarson C, Lovell M, Peters A, Ruelas V, Borut D, Burt D, Jordan M, Leinbach A, Castilla S, Flores P, Ruiz M, Hanson L, Green-Blair J, Sheridan R, Wintergerst K, Pierce G, Omoruyi A, Foster M, Linton C, Kingery S, Lunsford A, Cervantes I, Parker T, Price P, Urben J, Doughty I, Haydock H, Parker V, Bergman P, Liu S, Duncum S, Rodda C, Thomas A, Ferry R, McCommon D, Cockroft J, Perelman A, Calendo R, Barrera C, Arce-Nunez E, Lloyd J, Martinez Y, De la Portilla M, Cardenas I, Garrido L, Villar M, Lorini R, Calandra E, D’Annuzio G, Perri K, Minuto N, Malloy J, Rebora C, Callegari R, Ali O, Kramer J, Auble B, Cabrera S, Donohoue P, Fiallo-Scharer R, Hessner M, Wolfgram P, Maddox K, Kansra A, Bettin N, 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Trunnel S, Transue D, Surhigh J, Bezzaire D, Moltz K, Zacharski E, Henske J, Desai S, Frizelis K, Khan F, Sjoberg R, Allen K, Manning P, Hendry G, Taylor B, Jones S, Couch R, Danchak R, Lieberman D, Strader W, Bencomo M, Bailey T, Bedolla L, Roldan C, Moudiotis C, Vaidya B, Anning C, Bunce S, Estcourt S, Folland E, Gordon E, Harrill C, Ireland J, Piper J, Scaife L, Sutton K, Wilkins S, Costelloe M, Palmer J, Casas L, Miller C, Burgard M, Erickson C, Hallanger-Johnson J, Clark P, Taylor W, Galgani J, Banerjee S, Banda C, McEowen D, Kinman R, Lafferty A, Gillett S, Nolan C, Pathak M, Sondrol L, Hjelle T, Hafner S, Kotrba J, Hendrickson R, Cemeroglu A, Symington T, Daniel M, Appiagyei-Dankah Y, Postellon D, Racine M, Kleis L, Barnes K, Godwin S, McCullough H, Shaheen K, Buck G, Noel L, Warren M, Weber S, Parker S, Gillespie I, Nelson B, Frost C, Amrhein J, Moreland E, Hayes A, Peggram J, Aisenberg J, Riordan M, Zasa J, Cummings E, Scott K, Pinto T, Mokashi A, McAssey K, Helden E, Hammond P, Dinning L, Rahman S, Ray S, Dimicri C, Guppy S, Nielsen H, Vogel C, Ariza C, Morales L, Chang Y, Gabbay R, Ambrocio L, Manley L, Nemery R, Charlton W, Smith P, Kerr L, Steindel-Kopp B, Alamaguer M, Tabisola-Nuesca E, Pendersen A, Larson N, Cooper-Olviver H, Chan D, Fitz-Patrick D, Carreira T, Park Y, Ruhaak R, Liljenquist D. A Type 1 Diabetes Genetic Risk Score Predicts Progression of Islet Autoimmunity and Development of Type 1 Diabetes in Individuals at Risk. Diabetes Care 2018; 41:1887-1894. [PMID: 30002199 PMCID: PMC6105323 DOI: 10.2337/dc18-0087] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 06/06/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE We tested the ability of a type 1 diabetes (T1D) genetic risk score (GRS) to predict progression of islet autoimmunity and T1D in at-risk individuals. RESEARCH DESIGN AND METHODS We studied the 1,244 TrialNet Pathway to Prevention study participants (T1D patients' relatives without diabetes and with one or more positive autoantibodies) who were genotyped with Illumina ImmunoChip (median [range] age at initial autoantibody determination 11.1 years [1.2-51.8], 48% male, 80.5% non-Hispanic white, median follow-up 5.4 years). Of 291 participants with a single positive autoantibody at screening, 157 converted to multiple autoantibody positivity and 55 developed diabetes. Of 953 participants with multiple positive autoantibodies at screening, 419 developed diabetes. We calculated the T1D GRS from 30 T1D-associated single nucleotide polymorphisms. We used multivariable Cox regression models, time-dependent receiver operating characteristic curves, and area under the curve (AUC) measures to evaluate prognostic utility of T1D GRS, age, sex, Diabetes Prevention Trial-Type 1 (DPT-1) Risk Score, positive autoantibody number or type, HLA DR3/DR4-DQ8 status, and race/ethnicity. We used recursive partitioning analyses to identify cut points in continuous variables. RESULTS Higher T1D GRS significantly increased the rate of progression to T1D adjusting for DPT-1 Risk Score, age, number of positive autoantibodies, sex, and ethnicity (hazard ratio [HR] 1.29 for a 0.05 increase, 95% CI 1.06-1.6; P = 0.011). Progression to T1D was best predicted by a combined model with GRS, number of positive autoantibodies, DPT-1 Risk Score, and age (7-year time-integrated AUC = 0.79, 5-year AUC = 0.73). Higher GRS was significantly associated with increased progression rate from single to multiple positive autoantibodies after adjusting for age, autoantibody type, ethnicity, and sex (HR 2.27 for GRS >0.295, 95% CI 1.47-3.51; P = 0.0002). CONCLUSIONS The T1D GRS independently predicts progression to T1D and improves prediction along T1D stages in autoantibody-positive relatives.
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Affiliation(s)
- Maria J. Redondo
- Texas Children’s Hospital, Baylor College of Medicine, Houston, TX
| | | | - Andrea K. Steck
- Barbara Davis Center for Childhood Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Seth Sharp
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
| | - John M. Wentworth
- Walter and Eliza Hall Institute of Medical Research and Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Michael N. Weedon
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
| | | | | | | | | | - Richard A. Oram
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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4
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Affiliation(s)
- K. Federlin
- 3rd Medical Clinic and Polyclinic, Justus-Liebig University, Giessen - Germany
| | - R.G. Bretzel
- 3rd Medical Clinic and Polyclinic, Justus-Liebig University, Giessen - Germany
| | - B. Hering
- 3rd Medical Clinic and Polyclinic, Justus-Liebig University, Giessen - Germany
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5
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Ricordi C, Hering B, Bridges N, Eggerman T, Naji A, Posselt A, Stock P, Kaufman D, Larsen C, Turgeon N, Oberholzer J, Barbaro B, Korsgren O, Markmann J, Alejandro R, Rickels M, Senior P, Luo X, Zhang X, Bellin M, Lei J, Clarke W, Hunsicker L, Goldstein J, Czarniecki C, Priore A, Green N, Shapiro A. Completion of the first FDA phase 3 multicenter trial of Islet transplantation in type 1 diabetes by the NIH CIT consortium. Cytotherapy 2014. [DOI: 10.1016/j.jcyt.2014.01.034] [Citation(s) in RCA: 3] [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]
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6
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Loewenhardt B, Hüttinger R, Reinert M, Hering B, Rathjen T, Manke C, Bernhard M. Strahlenbelastung und Bildqualität: Einfluss von Immobilisationshilfen im Rahmen der Ganzkörper-CT-Diagnostik bei Traumapatienten. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346445] [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: 10/26/2022]
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7
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Hering B, Helmecke P, Köhler J, Denkena B. The Influence of Machining on Residual Stresses and Corrosion Behavior of MgLa2 Osteosynthesis Plates. BIOMED ENG-BIOMED TE 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-C/bmt-2013-4058/bmt-2013-4058.xml. [DOI: 10.1515/bmt-2013-4058] [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: 11/15/2022]
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8
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Abstract
Collagenase and ficoll are standard chemicals used for isolation and purification of pancreatic islets. The capacity of these substances to activate human complement was tested by incubation for 45 min at 37 degrees C with fresh or liquid nitrogen-stored human plasma from normal blood donors. Complement-split products were then determined by sensitive enzyme immunoassays from QUIDEL. Collagenase activates both the classical and the alternative pathway, whereas Ficoll activates the alternative pathway only. When present in islet preparations used for islet transplantation, these substances may induce local inflammatory reactions compromising islet viability and engraftment.
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Affiliation(s)
- H Jahr
- Third Medical Department, Justus-Liebig-University, Giessen, Germany
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9
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Johnson J, Pahuja A, Graham M, Hering B, Hancock WW, Bansal-Pakala P. Effects of histone deacetylase inhibitor SAHA on effector and FOXP3+regulatory T cells in rhesus macaques. Transplant Proc 2008; 40:459-61. [PMID: 18374101 DOI: 10.1016/j.transproceed.2008.01.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Suberoylanilide hydroxamic acid (SAHA) a histone deacetylase inhibitor (HDACi), is clinically approved for treatment of cutaneous T-cell lymphoma. Although the exact underlying mechanisms are unknown, HDACi arrests the cell cycle in rapidly proliferating tumor cells and promote their apoptosis. HDACi were also recently shown to enhance the production and suppressive functions of Foxp3+ regulatory T (Treg) cells in rodents, leading us to begin to investigate the actions of HDACi on rhesus monkey T cells for the sake of potential preclinical applications. In this study, we show that SAHA inhibits polyclonal activation and proliferation of rhesus T cells and that the antiproliferative effects are due to inhibition of T-effector (Teff) cells and enhancement of Treg cells. Cryopreserved rhesus macaque splenocytes were CFSE labeled, stimulated with anti-CD3/anti-CD28 and cultured for 5 days in the presence of varying concentrations of SAHA. Samples were then costained to evaluate CD4 and CD8 expression. Concentrations of SAHA (10 and 5 micromol/L) were toxic to splenocytes. Proliferation was inhibited by 57% in CD4 cells and 47% in CD8 cells when unseparated splenocytes were cultured with 3 micromol/L SAHA. Effector cells alone showed decreased inhibition to proliferation when cultured with 3 micromol/L and 1 micromol/L SAHA when compared to Teff plus Treg cells. Our data suggest that SAHA can be used as part of an immunosuppressive protocol to enhance graft survival by limiting Teff cell proliferation as well as increasing Treg cells, thereby promoting tolerance.
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Affiliation(s)
- J Johnson
- Diabetes Institute for Immunology and Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
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10
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Xu B, Yu Y, Al-Abdullah I, Kandeel F, Hering B, Wright J. Long-Term Survival and Function of Intraportal Porcine and Human Islet Xenografts in Nondiabetic Nude Mice. Transplant Proc 2008; 40:584-6. [DOI: 10.1016/j.transproceed.2008.02.002] [Citation(s) in RCA: 5] [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: 10/22/2022]
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11
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Abstract
In September 2001, the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) founded the Collaborative Islet Transplant Registry (CITR). Each year, CITR produces a complete set of analyses available to the public. In its second year, CITR represents the efforts of 19 North American islet transplant programs reporting information on 138 islet transplant recipients (1999-2004), 256 processed pancreata that led to infusion, and 266 infusion procedures. This analysis focuses on recipients of islet-alone procedures. Median age of the recipient is 41.6 years (range, 23.1-64.4 years), duration of diabetes is 29 years (range, 4-50 years), and over 66% are female. Median weight of the recipient is 65 kg (range, 47-97 kg) and median body mass index (BMI) is 23.1 kg/m(2) (range, 18.8-31.6). Examining outcomes at 6 months following the recipient's last infusion, 67.0% are insulin independent, and at 12 months this percentage decreases to 58.0%. There is a striking decrease in the occurrence of severe hypoglycemic events subsequent to the first infusion. Over 82% of all recipients experience one or more severe hypoglycemic events in the year prior to their first infusion. However, only two recipients (2%) experience one or more severe hypoglycemic events between 30 days and 12 months postinfusion, but both of these recipients were on insulin replacement therapy and one had experienced a complete islet graft failure. The information provided in this analysis and subsequent analyses of CITR provides current and comprehensive information on outcome measures in islet transplantation.
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Affiliation(s)
- N Close
- EMMES Corp, Rockville, MD, USA.
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12
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Sutherland DER, Gruessner R, Kandswamy R, Humar A, Hering B, Gruessner A. Beta-cell replacement therapy (pancreas and islet transplantation) for treatment of diabetes mellitus: an integrated approach. Transplant Proc 2005; 36:1697-9. [PMID: 15350456 DOI: 10.1016/j.transproceed.2004.06.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- D E R Sutherland
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
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13
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MESH Headings
- Animals
- Antibodies, Monoclonal/pharmacology
- Antigens, CD
- CD27 Ligand
- Graft Rejection/immunology
- Graft Rejection/prevention & control
- Islets of Langerhans Transplantation/immunology
- Ligands
- Membrane Glycoproteins
- Membrane Proteins/antagonists & inhibitors
- Membrane Proteins/physiology
- Mice
- Mice, Inbred C3H
- Mice, Inbred C57BL
- Mice, Knockout
- OX40 Ligand
- Receptors, OX40
- Receptors, Tumor Necrosis Factor/antagonists & inhibitors
- Receptors, Tumor Necrosis Factor/physiology
- Signal Transduction
- Transplantation, Homologous
- Tumor Necrosis Factor Receptor Superfamily, Member 7/immunology
- Tumor Necrosis Factor Receptor Superfamily, Member 7/physiology
- Tumor Necrosis Factors
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Affiliation(s)
- T Wu
- Diabetes Institute of Immunology and Transplantation, Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
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14
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Hering B, Horn LC, Nenning H, Kühndel K. Predictive value of DNA cytometry in CIN 1 and 2. Image analysis of 193 cases. Anal Quant Cytol Histol 2000; 22:333-7. [PMID: 10965410] [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] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
OBJECTIVE To investigate DNA image cytometry for predicting the prognosis of cervical intraepithelial neoplasia (CIN). STUDY DESIGN Smears from 151 women affected by CIN 1 or 2 on cytology with minimal follow-up of three years were included. Sixty-seven showed progression, with histologically confirmed carcinoma in situ or invasive cancer. Eighty-four cases showed regression of the disease, which was cytologically, histologically and colposcopically confirmed. Papanicolaou-stained smears were destained, and the Feulgen reaction was performed with consecutive image DNA cytometry of suspicious cells using an image analysis system (Cires, Zeiss, Germany). The DNA index of the greatest stemline and the number of single aneuploid cells, using 9c exceeding events, were computed. RESULTS In the group with progression, an aneuploid DNA stemline was found in 25 smears (26.9%). In 64 cases (66.7%) more than one aneuploid event was detected. The total number of aneuploid cases in this group was 76 (81%). In the group without progression, the number of aneuploid stemlines was 2 (2%). Single aneuploid cells could be found in five cases (5%). The overall number of aneuploid cases in that group was five. The sensitivity was 74.3%, positive predictive value 85.2% and negative predictive value 77%. CONCLUSION Aneuploidy is a marker for prospective malignancy in cervical Papanicolaou smears. DNA image cytometry, as an additional method, can be used to predict outcome in patients with CIN 1 and 2 of the cervix. DNA cytometry is not a screening method but can add further information for a treatment decision in doubtful cases.
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Affiliation(s)
- B Hering
- Institute of Pathology, Leipzig University, Germany
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15
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Paraskevas S, Aikin R, Maysinger D, Lakey JR, Cavanagh TJ, Hering B, Wang R, Rosenberg L. Activation and expression of ERK, JNK, and p38 MAP-kinases in isolated islets of Langerhans: implications for cultured islet survival. FEBS Lett 1999; 455:203-8. [PMID: 10437773 DOI: 10.1016/s0014-5793(99)00882-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.0] [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: 12/21/2022]
Abstract
Isolation and purification of islet cells exposes them to ischemic, osmotic and mechanical stresses. The objective of this study was to determine the roles of the MAP-kinases in islets immediately following isolation. During the first 48 h, activity of JNK1 and JNK2 declined markedly. Activity of p38 increased steadily with time in culture while extracellular signal regulated kinase (ERK) activity declined dramatically within 24 h post-isolation. High p38 activation relative to ERK activation immediately following isolation correlated with a decrease in islet survival after 36 h in culture. Absence and/or transiency of ERK signaling in conjunction with sustained activation of p38 pathway could be an important regulator of cell death in islets during and following their isolation by commonly employed procedures.
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Affiliation(s)
- S Paraskevas
- Department of Surgery, The Montreal General Hospital, Que., Canada
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16
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Siebers U, Horcher A, Brandhorst H, Brandhorst D, Hering B, Federlin K, Bretzel RG, Zekorn T. Analysis of the cellular reaction towards microencapsulated xenogeneic islets after intraperitoneal transplantation. J Mol Med (Berl) 1999; 77:215-8. [PMID: 9930966 DOI: 10.1007/s001090050339] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [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: 10/28/2022]
Abstract
Xenotransplantation of encapsulated islets of Langerhans is a possibility to overcome problems of human organ donor shortage in islet transplantation. Preexisting natural xenoantibodies are known to play a major role in the rejection of vascularized xenografts. Only little is known about the mechanism of rejection of non-vascularized cellular xenotransplants. In this study we introduce a method for the characterization of xenograft rejection of encapsulated islets by FACS analysis of peritoneal cells. Pig islets were transplanted intraperitoneally into non-diabetic Lewis rats either encapsulated or non-encapsulated. Animals receiving empty capsules and sham-operated animals served as controls. After 7 days a peritoneal lavage was performed. The total cell number and the viability of the cells were determined. Cells were analysed after staining with a panel of antibodies for the detection of T-lymphocytes, B-lymphocytes, macrophages, MHC class II molecules. Total cell number was highest after microencapsulated transplantation (149.4+/-30.1x10(6)) compared with empty capsules (41.4+/-19.7x10(6)) and non-encapsulated porcine islets (18.1+/-3.3x10(6)). The percentage of CD 3 positive T-lymphocytes rose to 44.5+/-11.5% in case of microencapsulated xenografts compared with 19.2+/-8.2% for non-encapsulated xenografts and 4.9+/-2.4% for empty controls. B-lymphocytes were detected in only small amounts. MHC class II expression on macrophages as activation marker was significantly increased after encapsulated transplantation (60.2+/-8.9% vs 15.2+/-7.0% for free islets and 4.9+/-1.2% for empty controls). The discrepancy between the macrophage activation due to encapsulated xenogeneic islets in comparison to empty capsules made from the same material clearly indicates that the reaction is not only material related but that a recognition of the encapsulated islet takes place despite the effective inhibition of a direct cell-to-cell contact. This recognition occurs on a T-cell level as well as on the macrophage level. 7 days after transplantation the reaction towards encapsulated xenografts is even more intense than to non-encapsulated xenografts. This might be due either to the time course of the rejection process or to a prolongation of the activation because antigen elimination is hindered by the capsule.
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Affiliation(s)
- U Siebers
- Medizinische Klinik III und Poliklinik der Justus-Liebig-Universität, Giessen, Germany
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17
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Abstract
Leptin is a hormone produced and secreted from the adipose tissue. Its physiological actions include the regulation of satiety, food intake and energy balance. The production of leptin is increased by high insulin levels. Here, we demonstrate that leptin acts as an inhibitor of glucose-induced (20 mM) insulin secretion from isolated human islets. No effect was observed in the presence of lower glucose levels (2.8 and 10 mM glucose). The pancreatic beta-cell might represent a target of a direct physiological action of leptin. We suggest the presence of an "adipo-insular axis" in which leptin mediates negative feedback from the adipose tissue to the endocrine pancreas.
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Affiliation(s)
- H C Fehmann
- Department of Medicine, Philipps-University of Marburg, Germany
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18
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Schneider P, Eipper HH, Gfirtner H, Hering B, Leetz HK, Welker K. [The personnel needs of health physics in radiotherapy]. Strahlenther Onkol 1996; 172:148-53; discussion 154-5. [PMID: 8721263] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
METHODS AND RESULTS Using a questionnaire, mean occupation time values for the different medical physics activities were derived in 1992; they formed the basis for recommendations of minimum physics staffing levels in radiotherapy. The recommended staffing levels were compared with the actual staffing levels and to other national and international recommendations.
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Affiliation(s)
- P Schneider
- Arbeitssausschuss, Deutsche, Gesellschaft für Medizinische Physik (DGMP)
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19
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Abstract
The effect of enterostatin on glucose-induced insulin secretion was examined in isolated, perifused rat islets. In the presence of 16.67 mM glucose, there was significant inhibition of insulin secretion at concentrations of 200 nM, 2, 20 and 40 microM enterostatin. In particular, the second phase of insulin secretion was inhibited. With a low concentration of glucose (2.78 mM), there was no significant effect on insulin secretion by enterostatin. The inhibition of insulin secretion exerted by enterostatin may be an important effect in the prevention of insulin resistance.
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20
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Siebers U, Zekorn T, Horcher A, Hering B, Bretzel RG, Zimmermann U, Federlin K. In vitro testing of rat and porcine islets microencapsulated in barium alginate beads. Transplant Proc 1992; 24:950-1. [PMID: 1604679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- U Siebers
- Medizinische Klinik III and Poliklinik, Justus Leibig-Universität, Giessen, Germany
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21
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Seissler J, Hering B, Richter W, Glück M, Yassin N, Bretzel RG, Boehm BO, Federlin K, Scherbaum WA. Antibodies to the M(r) 64,000 (64K) protein in islet cell antibody positive non-diabetic individuals indicate high risk for impaired beta-cell function. Diabetologia 1992; 35:550-4. [PMID: 1612228 DOI: 10.1007/bf00400483] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [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: 12/27/2022]
Abstract
A prospective study of a normal childhood population identified 44 islet cell antibody positive individuals. These subjects were typed for HLA DR and DQ alleles and investigated for the presence of antibodies to the M(r) 64,000 (64K) islet cell antigen, complement-fixing islet cell antibodies and radiobinding insulin autoantibodies to determine their potency in detecting subjects with impaired Beta-cell function. At initial testing 64K antibodies were found in six of 44 islet cell antibody positive subjects (13.6%). The same sera were also positive for complement-fixing islet cell antibodies and five of them had insulin autoantibodies. During the follow-up at 18 months, islet cell antibodies remained detectable in 50% of the subjects studied. In all six cases who were originally positive, 64K antibodies were persistently detectable, whereas complement-fixing islet cell antibodies became negative in two of six and insulin autoantibodies in one of five individuals. HLA DR4 (p less than 0.005) and absence of asparic acid (Asp) at position 57 of the HLA DQ beta chain (p less than 0.05) were significantly increased in subjects with 64K antibodies compared with control subjects. Of 40 individuals tested in the intravenous glucose tolerance test, three had a first phase insulin response below the first percentile of normal control subjects. Two children developed Type 1 (insulin-dependent) diabetes mellitus after 18 and 26 months, respectively. Each of these subjects was non-Asp homozygous and had persistent islet cell and 64K antibodies.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J Seissler
- Department of Internal Medicine I, University of Ulm, FRG
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22
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Racké K, Sommer M, Burns F, Hering B. Differential effects of electrical stimulation, blockade of neuronal amine uptake and activation of alpha 2-adrenoceptors on the release of endogenous noradrenaline and 5-hydroxytryptamine from the isolated rat pineal gland. Naunyn Schmiedebergs Arch Pharmacol 1991; 343:337-43. [PMID: 1712913 DOI: 10.1007/bf00179037] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Isolated rat pineal glands were incubated in vitro and the release of endogenous noradrenaline or 5-hydroxytryptamine (5-HT) and 5-hydroxyindoleacetic acid (5-HIAA) was determined by HPLC with electrochemical detection. In the absence of test drugs, the spontaneous outflow of noradrenaline was about 10 fmol/10 min and electrical stimulation (5 Hz, 1500 pulses) evoked the release of about 70 fmol noradrenaline. Nomifensine enhanced the spontaneous outflow of noradrenaline about threefold and the electrically evoked release of noradrenaline about sixfold. In the presence of nomifensine, the alpha 2-adrenoceptor antagonist yohimbine markedly increased the electrically evoked release of noradrenaline, whereas the alpha 1-adrenoceptor antagonist prazosin had no effect. Clonidine inhibited the electrically evoked release of noradrenaline by about 65%, and this was antagonized by yohimbine in a competitive manner. In the absence of drugs, the initial spontaneous outflow of 5-HT was (compared with noradrenaline) very high 64 pmol/10 min). It declined by 80% within 1 h of incubation in vitro. The outflow of 5-HIAA amounted initially to 38 pmol 10 min and declined by 40% within 1 h of incubation. Addition of L-tryptophan (10 mumol/l) after 1 h of incubation in vitro largely enhanced the outflow of 5-HT and 5-HIAA within 30 min of incubation (about ten- and fourfold, respectively). When L-tryptophan was present from the onset of incubation the initial outflow of 5-HT and 5-HIAA was only slightly elevated, but the decline was largely attenuated. Neither omission of calcium nor addition of nomifensine, clonidine or yohimbine significantly affected the spontaneous outflow of 5-HT or 5-HIAA.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- K Racké
- Pharmakologisches Institut, Universität Mainz, Federal Republic of Germany
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23
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Federlin K, Bretzel RG, Hering B. Pancreatic islet transplantation in diabetes. Int J Artif Organs 1991; 14:74-7. [PMID: 2037392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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24
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Racké K, Hering B, Weber I. Effects of Different Opioid Receptor Antagonists on the Electrically-Evoked Release of Endogenous Dopamine from the Isolated Neural Lobe of the Rat Pituitary Gland in vitro. J Neuroendocrinol 1990; 2:335-9. [PMID: 19215356 DOI: 10.1111/j.1365-2826.1990.tb00414.x] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Abstract Isolated neural lobes of the rat pituitary gland were incubated in Krebs-HEPES solution which contained the dopamine uptake inhibitor GBR 12921 and in some experiments additionally pargyline. The release of endogenous dopamine evoked by electrical stimulation of the pituitary stalk was determined by high-performance liquid chromatography with electrochemical detection. (+/-)- Naloxone increased the evoked dopamine release maximally by 440% (EC(50) 209 nM). The (+)-enantiomer of naloxone (up to 10 muM) did not affect the release of dopamine. The preferential kappa-opioid receptor antagonist MR 2266 increased the evoked dopamine release maximally by 135% (EC(50) 7 nM). MR 2267, the inactive (+)-enantiomer of MR 2266, had no effect on dopamine release. The delta-opioid receptor selective antagonist ICI 174864 increased the release of dopamine maximally by 120% (EC(50) 10 nM). The non-selective opioid receptor agonist etorphine up to 10 muM had no effect on the evoked dopamine release. In conclusion, endogenous opioids in the neurohypophysis strongly inhibit the release of endogenous dopamine from this gland. Activation of kappa- and delta-opioid receptors appears to be involved in the inhibitory action of the endogenous opioids on the neurohypophysial release of dopamine.
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Affiliation(s)
- K Racké
- Pharmakologisches Institut der Universität Mainz, Obere Zahlbacher Str. 67, D-6500 Mainz, FRG
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25
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Linn T, Lux K, Woehrle M, Zekorn T, Hering B, Bretzel R, Federlin K. Fish oil diet prevents insulitis in transplanted islets of Langerhans. Transplant Proc 1990; 22:871-2. [PMID: 2109424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- T Linn
- Center of Internal Medicine, Medical Clinic III, Justus Liebig University Giessen, West Germany
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26
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Racké K, Hering B, Ziegler K. Lack of autoreceptor mediated regulation of the spontaneous dopamine turnover in the isolated neurointermediate lobe of the rat pituitary gland in vitro. Naunyn Schmiedebergs Arch Pharmacol 1990; 341:182-5. [PMID: 1971426 DOI: 10.1007/bf00169728] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Isolated neurointermediate lobes of the rat pituitary gland were incubated in Krebs-HEPES solution and the spontaneous outflow of endogenous dopamine and its metabolites (DOPAC, HVA and MOPET) was determined by HPLC with electrochemical detection. The spontaneous outflow of dopamine metabolites (about 1500 fmol/10 min) largely exceeded that of dopamine (about 60 fmol/10 min). Apomorphine concentration-dependently (IC50, 205 nmol/l) reduced the spontaneous outflow of the dopamine metabolites. The effect of apomorphine developed slowly and was progressive over an observation period of 70 min. After 1 h of exposure to a maximall effective concentration of apomorphine (10 mumol/l), the outflow of metabolites was inhibited by 43%. The effect of apomorphine was not affected by the dopamine D2 receptor antagonist (-)-sulpiride nor by the dopamine D1 receptor antagonist SCH 23390. Neither quinpirole nor fenoldopam significantly affected the spontaneous outflow of dopamine metabolites. It was previously shown that the high rate of spontaneous outflow of dopamine metabolites from the dopaminergic nerves in the neurointermediate lobe reflects largely the immediate catabolism of newly synthesized dopamine. This high rate of spontaneous dopamine synthesis in the neurointermediate lobe is not controlled by dopamine autoreceptors. Apomorphine appears to inhibit the spontaneous dopamine turnover by an inhibition not mediated by dopamine receptors.
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Affiliation(s)
- K Racké
- Pharmakologisches Institut, Universität Mainz, Federal Republic of Germany
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27
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Linn T, Becker M, Woehrle M, Zekorn T, Hering B, Bretzel RG, Federlin K. Immune destruction of transplanted islets of Langerhans in a model of induced type 1 diabetes. Transplant Proc 1989; 21:2685-6. [PMID: 2523161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- T Linn
- Center of Internal Medicine, Justus Liebig University, Giessen, West Germany
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28
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Racké K, Hering B, Hochgesand U. Effects of gadolinium and cadmium on the electrically evoked release of 45calcium from the isolated rat neurohypophysis. Naunyn Schmiedebergs Arch Pharmacol 1988; 337:301-7. [PMID: 3393232 DOI: 10.1007/bf00168843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Isolated neural lobes of the rat pituitary gland were fixed by their stalks to a platinum wire electrode. They were loaded with 45calcium and then superfused with radioactivity-free Krebs-solution. The efflux of 45calcium into the superfusion medium was determined. After 54-60 min of superfusion the spontaneous outflow of 45calcium was 2.03%/min of the tissue 45calcium. It was not affected by cadmium (Cd2+, 0.03-3 mmol/l), but reduced by 40% in the presence of 1 mmol/l gadolinium (Gd3+). Electrical stimulation with pulses of 15 Hz (3 times for 1 min with intervals of 1 min) evoked a 45calcium release of 14.4% of the tissue radioactivity. The evoked release of 45calcium was reduced by 80% in the presence of tetrodotoxin and by about 50% in the presence of gallopamil (D600, 30 mumol/l) or after omission of unlabelled calcium from the superfusion medium. Gd3+ concentration-dependently reduced the evoked release by maximally 75% at 3 mmol/l. However, it inhibited the evoked release of 45calcium less effectively than the release of vasopressin evoked by identical stimulation conditions. Cd2+ reduced the evoked release by maximally 55% at 300 mumol/l. The effect of Cd2+ on the evoked release of vasopressin was not tested because Cd2+ markedly increased the spontaneous outflow of vasopressin. When the stimulation was carried out for only 1 min at 15 Hz (i.e. 900 pulses) the evoked release of 45calcium was 10.6% of the tissue 45calcium and 100 mumol/l Cd2+ or 300 mumol/l Gd3+ caused a reduction of the evoked release similar to that observed when 3 periods of stimulation were applied.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- K Racké
- Department of Pharmacology, University of Mainz, Federal Republic of Germany
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29
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Federlin K, Bretzel RG, Hering B. [Developments of islet cell transplantation]. Z Gastroenterol Verh 1987; 22:78-85. [PMID: 2442914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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30
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Mierau HD, Wüstefeld L, Holler-Hübsch M, Spindler T, Hering B. [Roughness studies of vestibular and lingual tooth surfaces]. Dtsch Zahnarztl Z 1982; 37:176-80. [PMID: 7042307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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31
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Mierau HD, Hering B. [Form analysis of the gingival pulse curve in studying the microcirculation]. Dtsch Zahnarztl Z 1981; 36:435-9. [PMID: 6945966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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32
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Mierau HD, Hering B. [Turgor in different areas of healthy gingiva and alveolar mucosa]. Dtsch Zahnarztl Z 1981; 36:317-24. [PMID: 6944199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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33
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Menninger H, Burkhardt H, Röske W, Ehlebracht W, Hering B, Gurr E, Mohr W, Mierau HD. Lysosomal elastase: effect on mechanical and biochemical properties of normal cartilage, inhibition by polysulfonated glycosaminoglycan, and binding to chondrocytes. Rheumatol Int 1981; 1:73-81. [PMID: 6287562 DOI: 10.1007/bf00541157] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Rheumatic joint destruction usually starts with the destabilisation of cartilage. Lysosomal elastase is a candidate effector of this process, since this enzyme is found at the site of cartilage erosion by rheumatoid synovial tissue. In order to prove this hypothesis we assessed the mechanical stability of cartilage during treatment by this enzyme in vitro. An indentation apparatus was used for this purpose and biochemical as well as microscopic techniques were used to supplement the results thus obtained. Our findings show that elastase irreversibly impairs the stability of cartilage by lysis of matrix proteoglycans without the help of additive enzymes. Collagen fragmentation played no significant role during elastase-induced destabilisation, while specific collagenase attacked the collagen network within the matrix only subsequent to the removal of proteoglycans. These findings suggest that elastase is a leading enzyme during proteolytic cartilage degradation. In addition polysulfonated glycosaminoglycan was found to reduce the mechanical effect of elastase on normal cartilage. It is therefore concluded that local inhibition of elastase promises therapeutic benefit during rheumatic cartilage degradation. Upon treatment of cartilage with elastase we observed this enzyme not only within the matrix under destruction but also bound to chondrocytes. These findings support the hypothesis that elastase plays a role on the matrix not only by direct degradation, but also by an indirect effect mediated through living chondrocytes.
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34
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Hering B, Mierau HD. [Progress in the study of gingival turgor]. Dtsch Zahnarztl Z 1980; 35:722-4. [PMID: 7007009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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35
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Mierau HD, Hering B. [Pulse behavior of the gingiva under differential temperature effects]. Dtsch Zahnarztl Z 1980; 35:717-21. [PMID: 6936244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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36
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Perevoshchikova KA, Prokoph H, Hering B, Koen IM, Zbarskiĭ IB. [Effect of heparin, spermidine and Be2+ ions on the phosphatase and RNAse activity of rat liver cell nuclei]. Biull Eksp Biol Med 1979; 87:542-4. [PMID: 223683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Effects of heparin, spermidine, and Be2+ ions on the ATPase and beta-glycerophosphatase and RNA-ase activities of the rat liver cell nuclei were studied. Be2+ was shown to inhibit the ATPase activity and, to a lesser extent, beta-glycerophosphatase activities. Physiological concentrations of heparin and spermidine also lowered the mentioned two activities, as well as the RNAase activity of the nuclei. Evidence is presented for the inhibitory effect of heparin and spermidine on endonucleases.
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37
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Mierau HD, Hering B. [The use of periodic forces of various frequencies for the study of the visco-elastic properties of the gingiva]. Dtsch Zahnarztl Z 1979; 34:378-82. [PMID: 285820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The examination of interdental papilla using the turgometric procedure with forced oscillations in the frequency range between 30 Hz and 330 Hz provides diagnostically valuable information. With a relatively simple evaluation procedure, a quantitative value for the degree of inflammation in each interdental papilla can be obtained directly.
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