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Crawford SA, Groegler J, Dang M, Michel C, Powell RL, Hohenstein AC, Reyes K, Haskins K, Wiles TA, Delong T. Hybrid insulin peptide isomers spontaneously form in pancreatic beta-cells from an aspartic anhydride intermediate. J Biol Chem 2023; 299:105264. [PMID: 37734557 PMCID: PMC10590738 DOI: 10.1016/j.jbc.2023.105264] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 09/05/2023] [Accepted: 09/13/2023] [Indexed: 09/23/2023] Open
Abstract
Hybrid insulin peptides (HIPs) form in beta-cells when insulin fragments link to other peptides through a peptide bond. HIPs contain nongenomic amino acid sequences and have been identified as targets for autoreactive T cells in type 1 diabetes. A subgroup of HIPs, in which N-terminal amine groups of various peptides are linked to aspartic acid residues of insulin C-peptide, was detected through mass spectrometry in pancreatic islets. Here, we investigate a novel mechanism that leads to the formation of these HIPs in human and murine islets. Our research herein shows that these HIPs form spontaneously in beta-cells through a mechanism involving an aspartic anhydride intermediate. This mechanism leads to the formation of a regular HIP containing a standard peptide bond as well as a HIP-isomer containing an isopeptide bond by linkage to the carboxylic acid side chain of the aspartic acid residue. We used mass spectrometric analyses to confirm the presence of both HIP isomers in islets, thereby validating the occurrence of this novel reaction mechanism in beta-cells. The spontaneous formation of new peptide bonds within cells may lead to the development of neoepitopes that contribute to the pathogenesis of type 1 diabetes as well as other autoimmune diseases.
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Affiliation(s)
- Samantha A Crawford
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Jason Groegler
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Mylinh Dang
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Cole Michel
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Roger L Powell
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Anita C Hohenstein
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA; Department of Immunology and Microbiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Kaitlin Reyes
- Department of Immunology and Microbiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Kathryn Haskins
- Department of Immunology and Microbiology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Timothy A Wiles
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Thomas Delong
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
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Deshmukh P, De Kouchkovsky I, Zhang L, Jindal T, Reyes K, Hernandez Romero E, Chan E, Desai A, Borno H, Kwon D, Wong A, Bose R, Aggarwal R, Porten S, Fong L, Small E, Chou J, Friedlander T, Koshkin V. 1751P Impact of squamous histology on clinical outcomes and molecular profiling in metastatic urothelial carcinoma (mUC) patients (pts) treated with newer therapies. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1829] [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: 11/30/2022] Open
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3
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Lisk R, Watts P, O’Sullivan R, Stevenson K, Pagkalinawan M, Reyes K, Foan Z, Chikusu CMP. 128TWO YEARS IMPACT OF AN OLDER PEOPLE SHORT STAY UNIT (OPSSU) TEAM WORKING ACROSS EMERGENCY AREAS IN THE OVER 75 S. Age Ageing 2018. [DOI: 10.1093/ageing/afy126.44] [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: 11/14/2022] Open
Affiliation(s)
- R Lisk
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - P Watts
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - R O’Sullivan
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - K Stevenson
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - M Pagkalinawan
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - K Reyes
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - Z Foan
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
| | - C M P Chikusu
- Care of the Elderly Department, Ashford and St. Peter’s NHS Trust
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4
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Aguila E, Lim A, Reyes K, Samson M. The predictive value of the nutrition risk in the critically ill (NUTRIC) in comparison to the modified subjective global assessment (SGA) nutritional assessment tool for 28-day intensive care unit (ICU) mortality in a philippine tertiary hospital. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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5
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Shih R, Phillips J, Tsifansky M, Machado D, Ebraheem M, Venkata G, Sullivan K, Gupta D, Reyes K, Pietra B, Fricker F, Bleiweis M. Early Implantation of Ventricular Assisted Devices (VADs) in Failing Single Ventricle Physiology Patients Can Lead to Better Outcomes in Pediatric Heart Transplantation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1054] [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: 11/16/2022] Open
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6
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López-Falcony R, Ramírez-Orozco R, Ortiz-Aldana FI, Rodríguez-Jamaica J, Ramírez-Orozco A, Camarena-Reynoso H, Nava-Romero E, Reyes K, Martínez-Bernal S, Sánchez-Ojeda M, Martínez-Navarro M, Colio-Montoya M. Attitudes Toward Organ Donation and Transplantation in Guanajuato, Mexico. Transplant Proc 2016; 48:556-8. [PMID: 27110001 DOI: 10.1016/j.transproceed.2016.02.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Chronic diseases have become a main cause of morbidity and mortality provoking function loss in organs. Quality of life is poor and expensive with replacement therapy. Transplantation offers a higher survival rate and a better life; however, the donation rate in Mexico is low, making it important to know the opinion of the population. METHODS Six hundred forty-two people in Guanajuato, Mexico, (>15 years old) were enrolled. Demographic characteristics, education, religion, organ donation, and transplantation attitudes were evaluated. RESULTS Donation attitudes in life or death were: very willing to donation (82.8% vs 61.5%), refuse to donate (12.7% vs 29.4%), and undecided (4.5% vs 9.1%). Reasons for donation were: altruism (63%), being useful to someone (28.6%), and empathy (7.1%). Negative causes were: personal beliefs (35.6%), fear (23.7%), and ignorance or "I don't know the recipient" (18.5%). Finally, 94.5% of the population is willing to receive a transplant if they need it. CONCLUSIONS Guanajuato has a high tendency to donate their own organs, but less to donate from a family member. Refusal to donate has originated from lack/misinformation that people received from health professionals. Although most people are willing to donate, this is not reflected in donation rates. To be able to make this intention reality, we must create educational models for health care personnel that will allow them to transmit proper information to the population.
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Affiliation(s)
| | | | | | | | | | | | | | - K Reyes
- General Hospital, Leon, Mexico
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7
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Bollani M, Bietti S, Frigeri C, Chrastina D, Reyes K, Smereka P, Millunchick JM, Vanacore GM, Burghammer M, Tagliaferri A, Sanguinetti S. Ordered arrays of embedded Ga nanoparticles on patterned silicon substrates. Nanotechnology 2014; 25:205301. [PMID: 24784353 DOI: 10.1088/0957-4484/25/20/205301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We fabricate site-controlled, ordered arrays of embedded Ga nanoparticles on Si, using a combination of substrate patterning and molecular-beam epitaxial growth. The fabrication process consists of two steps. Ga droplets are initially nucleated in an ordered array of inverted pyramidal pits, and then partially crystallized by exposure to an As flux, which promotes the formation of a GaAs shell that seals the Ga nanoparticle within two semiconductor layers. The nanoparticle formation process has been investigated through a combination of extensive chemical and structural characterization and theoretical kinetic Monte Carlo simulations.
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Affiliation(s)
- M Bollani
- CNR-IFN, L-NESS, via Anzani 42, I-22100 Como, Italy
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8
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Kelk D, Reyes K, Lo J, Leondires M, Richlin S, Hurwitz J. Pregnancy rates of vitrified blastocysts are equal to fresh day 6 transfers for euploid embryos following comprehensive chromosomal screening (CCS). Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.394] [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: 11/24/2022]
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9
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Kelk D, Lo J, Reyes K, Leondires M, Hurwitz J, Murdock C. Age related probability of having a chromosomally normal embryo for transfer following trophectoderm biopsy and comprehensive chromosome screening. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.210] [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]
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10
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Vakil N, Su J, Mason D, Reyes K, Murthy S, Pettersson G. Allograft Entrapment after Lung Transplantation: A Simple Solution Using a Pleurocutaneous Catheter. Thorac Cardiovasc Surg 2010; 58:299-301. [DOI: 10.1055/s-0030-1249801] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Jovanović M, Pelemis M, Pavlović M, Stosović B, Tosić T, Milosević I, Reyes K, Zervos M. Recidivant endocarditis: report of two cases. J Heart Valve Dis 2010; 19:540-541. [PMID: 20845905] [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: 05/29/2023]
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12
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Vallejo M, Reyes K, Reyes PA, González Hermosillo JA. [Late potentials and variability of cardiac frequency in chronic chagasic myocardiopathy and other myocardiopathies]. Arch Inst Cardiol Mex 1997; 67:485-93. [PMID: 9585831] [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: 02/07/2023]
Abstract
In patients suffering dilated cardiomyopathy, chagasic or not, and in healthy volunteers we applied signal-averaged electrocardiography to detect late potentials and to study heart autonomic control. Thus, with non-invasive methods, we were able to explore the progress of depolarization and heart rate variability. It was found that Chagasic patients have more late potentials and abnormalities in the heart variability; with less co-morbid process when compared with patients suffering miscellaneous cardiomyopathies. These preliminary findings corroborate and expand previous observations by several authors. The signal-averaged electrocardiogram is a valuable tool for clinical diagnosis and research, particularly for studies on dilated cardiomyopathy, specially those with parasitic etiology.
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Affiliation(s)
- M Vallejo
- Div. de Estudios de Posgrado, Facultad de Medicina, UNAM, México, D.F
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13
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Piedras J, Gutierrez S, Reyes-López PA, Reyes K, López-Karpovitch X, Monteón V. Circulating lymphocyte subpopulations and activated T and B cells in patients with chagasic and non-chagasic myocardiopathy. Cytometry 1997; 30:28-32. [PMID: 9056739 DOI: 10.1002/(sici)1097-0320(19970215)30:1<28::aid-cyto4>3.0.co;2-b] [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: 02/03/2023]
Abstract
Trypanosoma cruzi causes a profound immune depression in the infected host, and a small proportion of chagasic patients will develop a chronic disease characterized by myocardiopathy. There is evidence suggesting that dilated non-chagasic cardiomyopathy may be mediated by an immunological mechanism. In an attempt to distinguish abnormal immunoregulatory cell patterns in both dilated myocardiopathies, total and activated T and B lymphocyte subpopulations were measured by flow cytometry and double-labeling in whole blood samples from patients with dilated myocardiopathy, 10 with positive serological tests for T. cruzi and 9 with different non-chagasic cardiomyopathies. Several significant differences were found between both groups of patients and 13 sex- and age-matched apparently healthy controls. Chagasic patients besides showing clear decrease in absolute numbers of CD3+/CD71+ and CD8+/CD25+ cell populations also had a significant increase in CD19+, CD10+, and CD19+/HLA-DR+ cell subsets, as well as high helper/ suppressor cell ratio. These findings suggest that concurrently with T cell diminution, which involved activated T lymphocytes displaying suppressor/cytotoxic immunophenotype, chronic chagasic patients with myocardiopathy showed elevated numbers of total and activated B lymphocytes. Patients with dilated non-chagasic myocardiopathy had significantly increased numbers of activated T cells (CD3+/CD25+, CD8+/CD25+, and CD8+/HLA-DR+) and total and activated B lymphocytes (CD10+, CD19+, CD19+HLA-DR+). These data support the notion that dilated myocardiopathies other than the chagasics may be associated with immunological abnormalities.
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Affiliation(s)
- J Piedras
- Instituto Nacional de la Nutricion Salvador Zubiran, Hematology-Oncology Department, Laboratory of Cell Biology, Mexico
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