1
|
Godoy M, Coca Y, Suárez R, Montes de Oca M, Bledsoe JW, Burbulis I, Caro D, Pontigo JP, Maracaja-Coutinho V, Arias-Carrasco R, Rodríguez-Córdova L, Sáez-Navarrete C. Salmo salar Skin and Gill Microbiome during Piscirickettsia salmonis Infection. Animals (Basel) 2023; 14:97. [PMID: 38200828 PMCID: PMC10778177 DOI: 10.3390/ani14010097] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/13/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024] Open
Abstract
Maintaining the high overall health of farmed animals is a central tenant of their well-being and care. Intense animal crowding in aquaculture promotes animal morbidity especially in the absence of straightforward methods for monitoring their health. Here, we used bacterial 16S ribosomal RNA gene sequencing to measure bacterial population dynamics during P. salmonis infection. We observed a complex bacterial community consisting of a previously undescribed core pathobiome. Notably, we detected Aliivibrio wodanis and Tenacibaculum dicentrarchi on the skin ulcers of salmon infected with P. salmonis, while Vibrio spp. were enriched on infected gills. The prevalence of these co-occurring networks indicated that coinfection with other pathogens may enhance P. salmonis pathogenicity.
Collapse
Affiliation(s)
- Marcos Godoy
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Lago Panguipulli 1390, Puerto Montt 5480000, Región de Los Lagos, Chile; (M.M.d.O.); (D.C.)
- Laboratorio de Biotecnología, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Lago Panguipulli 1390, Puerto Montt 5480000, Región de Los Lagos, Chile
| | - Yoandy Coca
- Doctorado en Ciencias de la Ingeniería, Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Santiago 7820436, Macul, Chile;
| | - Rudy Suárez
- Programa de Magíster en Acuicultura, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo 1780000, Elqui, Chile;
| | - Marco Montes de Oca
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Lago Panguipulli 1390, Puerto Montt 5480000, Región de Los Lagos, Chile; (M.M.d.O.); (D.C.)
| | - Jacob W. Bledsoe
- Department of Animal, Veterinary, and Food Sciences, Aquaculture Research Institute, University of Idaho, Hagerman, ID 83332, USA;
| | - Ian Burbulis
- Facultad de Medicina y Ciencia, Centro de Investigación Biomédica, Universidad San Sebastián, Sede Patagonia, Lago Panguipulli 1390, Puerto Montt 5480000, Región de Los Lagos, Chile;
| | - Diego Caro
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Lago Panguipulli 1390, Puerto Montt 5480000, Región de Los Lagos, Chile; (M.M.d.O.); (D.C.)
| | - Juan Pablo Pontigo
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Lago Panguipulli 1390, Puerto Montt 5480000, Región de Los Lagos, Chile;
| | - Vinicius Maracaja-Coutinho
- Unidad de Genómica Avanzada, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 7820436, Macul, Chile;
- Centro de Modelamiento Molecular, Biofísica y Bioinformática (CM2B2), Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 7820436, Macul, Chile
- Beagle Bioinformatics, Santiago 7820436, Macul, Chile
| | - Raúl Arias-Carrasco
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Santiago 7820436, Macul, Chile;
| | | | - César Sáez-Navarrete
- Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Macul, Chile;
- Centro de Investigación en Nanotecnología y Materiales Avanzados (CIEN-UC), Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Macul, Chile
| |
Collapse
|
2
|
Coca Y, Godoy M, Pontigo JP, Caro D, Maracaja-Coutinho V, Arias-Carrasco R, Rodríguez-Córdova L, de Oca MM, Sáez-Navarrete C, Burbulis I. Publisher Correction: Bacterial networks in Atlantic salmon with Piscirickettsiosis. Sci Rep 2023; 13:18834. [PMID: 37914760 PMCID: PMC10620200 DOI: 10.1038/s41598-023-45850-5] [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: 11/03/2023] Open
Affiliation(s)
- Yoandy Coca
- Doctorado en Ciencias de la Ingeniería, Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile
| | - Marcos Godoy
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
| | - Juan Pablo Pontigo
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - Diego Caro
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - Vinicius Maracaja-Coutinho
- Centro de Modelamiento Molecular, Biofísica y Bioinformática (CM2B2), Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Avenida Dr. Carlos Lorca Tobar 964, 8380494, Santiago, Región Metropolitana, Chile
- Beagle Bioinformatics, Santiago, Región Metropolitana, Chile
- Unidad de Genómica Avanzada, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Avenida Dr. Carlos Lorca Tobar 964, 8380494, Santiago, Región Metropolitana, Chile
| | - Raúl Arias-Carrasco
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Avenida Dieciocho 161, 8330383, Santiago, Región Metropolitana, Chile
| | - Leonardo Rodríguez-Córdova
- Facultad de Ingeniería, Escuela de Ingeniería, Universidad Santo Tomás, Avenida Ejército Libertador 146, Santiago, Región Metropolitana, Chile
| | - Marco Montes de Oca
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - César Sáez-Navarrete
- Departamento de Ingeniería Química y Bioprocesos, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile.
- Centro de Investigación en Nanotecnología y Materiales Avanzados (CIEN-UC), Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile.
| | - Ian Burbulis
- Centro de Investigación Biomédica, Facultad de Medicina y Ciencia, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
| |
Collapse
|
3
|
Coca Y, Godoy M, Pontigo JP, Caro D, Maracaja-Coutinho V, Arias-Carrasco R, Rodríguez-Córdova L, de Oca MM, Sáez-Navarrete C, Burbulis I. Bacterial networks in Atlantic salmon with Piscirickettsiosis. Sci Rep 2023; 13:17321. [PMID: 37833268 PMCID: PMC10576039 DOI: 10.1038/s41598-023-43345-x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
An unbalanced composition of gut microbiota in fish is hypothesized to play a role in promoting bacterial infections, but the synergistic or antagonistic interactions between bacterial groups in relation to fish health are not well understood. We report that pathogenic species in the Piscirickettsia, Aeromonas, Renibacterium and Tenacibaculum genera were all detected in the digesta and gut mucosa of healthy Atlantic salmon without clinical signs of disease. Although Piscirickettsia salmonis (and other pathogens) occurred in greater frequencies of fish with clinical Salmonid Rickettsial Septicemia (SRS), the relative abundance was about the same as that observed in healthy fish. Remarkably, the SRS-positive fish presented with a generalized mid-gut dysbiosis and positive growth associations between Piscirickettsiaceae and members of other taxonomic families containing known pathogens. The reconstruction of metabolic phenotypes based on the bacterial networks detected in the gut and mucosa indicated the synthesis of Gram-negative virulence factors such as colanic acid and O-antigen were over-represented in SRS positive fish. This evidence indicates that cooperative interactions between organisms of different taxonomic families within localized bacterial networks might promote an opportunity for P. salmonis to cause clinical SRS in the farm environment.
Collapse
Affiliation(s)
- Yoandy Coca
- Doctorado en Ciencias de la Ingeniería, Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile
| | - Marcos Godoy
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
| | - Juan Pablo Pontigo
- Laboratorio Institucional, Facultad de Ciencias de la Naturaleza, Escuela de Medicina Veterinaria, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - Diego Caro
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - Vinicius Maracaja-Coutinho
- Centro de Modelamiento Molecular, Biofísica y Bioinformática (CM2B2), Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Avenida Dr. Carlos Lorca Tobar 964, 8380494, Santiago, Región Metropolitana, Chile
- Beagle Bioinformatics, Santiago, Región Metropolitana, Chile
- Unidad de Genómica Avanzada, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Avenida Dr. Carlos Lorca Tobar 964, 8380494, Santiago, Región Metropolitana, Chile
| | - Raúl Arias-Carrasco
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Avenida Dieciocho 161, 8330383, Santiago, Región Metropolitana, Chile
| | - Leonardo Rodríguez-Córdova
- Facultad de Ingeniería, Escuela de Ingeniería, Universidad Santo Tomás, Avenida Ejército Libertador 146, Santiago, Región Metropolitana, Chile
| | - Marco Montes de Oca
- Centro de Investigaciones Biológicas Aplicadas (CIBA), Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile
| | - César Sáez-Navarrete
- Departamento de Ingeniería Química y Bioprocesos, Pontificia Universidad Católica de Chile, Avenida. Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile.
- Centro de Investigación en Nanotecnología y Materiales Avanzados (CIEN-UC), Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, 7820436, Santiago, Región Metropolitana, Chile.
| | - Ian Burbulis
- Centro de Investigación Biomédica, Facultad de Medicina y Ciencia, Universidad San Sebastián, Sede Patagonia, Avenida Lago Panguipulli 1390, Puerto Montt, Región de Los Lagos, Chile.
| |
Collapse
|
4
|
Andrades-Lagos J, Campanini-Salinas J, Pedreros-Riquelme A, Mella J, Choquesillo-Lazarte D, Zamora PP, Pessoa-Mahana H, Burbulis I, Vásquez-Velásquez D. Design, Synthesis, and Structure-Activity Relationship Studies of New Quinone Derivatives as Antibacterial Agents. Antibiotics (Basel) 2023; 12:1065. [PMID: 37370384 DOI: 10.3390/antibiotics12061065] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
Resistance to antibacterial agents is a growing global public health problem that reduces the efficacy of available antibacterial agents, leading to increased patient mortality and morbidity. Unfortunately, only 16 antibacterial drugs have been approved by the FDA in the last 10 years, so it is necessary to develop new agents with novel chemical structures and/or mechanisms of action. In response to this, our group takes up the challenge of designing a new family of pyrimidoisoquinolinquinones displaying antimicrobial activities against multidrug-resistant Gram-positive bacteria. Accordingly, the objective of this study was to establish the necessary structural requirements to obtain compounds with high antibacterial activity, along with the parameters controlling antibacterial activity. To achieve this goal, we designed a family of compounds using different strategies for drug design. Forty structural candidates were synthesized and characterized, and antibacterial assays were carried out against high-priority bacterial pathogens. A variety of structural properties were modified, such as hydrophobicity and chain length of functional groups attached to specific carbon positions of the quinone core. All the synthesized compounds inhibited Gram-positive pathogens in concentrations ranging from 0.5 to 64 µg/mL. Two derivatives exhibited minimum inhibitory concentrations of 64 µg/mL against Klebsiella pneumoniae, while compound 28 demonstrated higher potency against MRSA than vancomycin.
Collapse
Affiliation(s)
- Juan Andrades-Lagos
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago 7510157, Chile
- Drug Development Laboratory, Faculty of Chemical and Pharmaceutical, Sciences, Universidad de Chile, Santiago 8380492, Chile
| | - Javier Campanini-Salinas
- Drug Development Laboratory, Faculty of Chemical and Pharmaceutical, Sciences, Universidad de Chile, Santiago 8380492, Chile
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Puerto Montt 5501842, Chile
| | - América Pedreros-Riquelme
- Drug Development Laboratory, Faculty of Chemical and Pharmaceutical, Sciences, Universidad de Chile, Santiago 8380492, Chile
| | - Jaime Mella
- Instituto de Química y Bioquímica, Facultad de Ciencias, Universidad de Valparaíso, Playa Ancha, Valparaíso 2360102, Chile
- Centro de Investigación Farmacopea Chilena (CIFAR), Facultad de Farmacia, Universidad de Valparaíso, Playa Ancha, Valparaíso 2360102, Chile
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos, IACT (CSIC-UGR), Av. de las Palmeras 4, 18100 Armilla, Spain
| | - P P Zamora
- Departamento de Química y Biología, Facultad de Ciencias Naturales, Universidad de Atacama, Copiapó 1530000, Chile
| | - Hernán Pessoa-Mahana
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380492, Chile
| | - Ian Burbulis
- Centro de Investigación Biomédica, Facultad de Medicina y Ciencias, Universidad San Sebastián, Sede de la Patagonia, Puerto Montt 5501842, Chile
| | - David Vásquez-Velásquez
- Drug Development Laboratory, Faculty of Chemical and Pharmaceutical, Sciences, Universidad de Chile, Santiago 8380492, Chile
| |
Collapse
|
5
|
Liu S, Huckaby AC, Brown AC, Moore CC, Burbulis I, McConnell MJ, Güler JL. Single-cell sequencing of the small and AT-skewed genome of malaria parasites. Genome Med 2021; 13:75. [PMID: 33947449 PMCID: PMC8094492 DOI: 10.1186/s13073-021-00889-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/17/2021] [Indexed: 12/23/2022] Open
Abstract
Single-cell genomics is a rapidly advancing field; however, most techniques are designed for mammalian cells. We present a single-cell sequencing pipeline for an intracellular parasite, Plasmodium falciparum, with a small genome of extreme base content. Through optimization of a quasi-linear amplification method, we target the parasite genome over contaminants and generate coverage levels allowing detection of minor genetic variants. This work, as well as efforts that build on these findings, will enable detection of parasite heterogeneity contributing to P. falciparum adaptation. Furthermore, this study provides a framework for optimizing single-cell amplification and variant analysis in challenging genomes.
Collapse
Affiliation(s)
- Shiwei Liu
- Department of Biology, University of Virginia, Charlottesville, VA, USA
| | - Adam C Huckaby
- Department of Biology, University of Virginia, Charlottesville, VA, USA
| | - Audrey C Brown
- Department of Biology, University of Virginia, Charlottesville, VA, USA
| | - Christopher C Moore
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Ian Burbulis
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, VA, USA
- Escuela de Medicina, Universidad San Sebastian, Puerto Montt, Chile
| | - Michael J McConnell
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Current address: Lieber Institute for Brain Development, Baltimore, MD, USA
| | - Jennifer L Güler
- Department of Biology, University of Virginia, Charlottesville, VA, USA.
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA.
| |
Collapse
|
6
|
Grab DJ, Sharma A, Burbulis I, Lehrer AT, Nerurkar V, Magez S. Nanobody LAMPoles: Novel tools for dengue virus and Zika virus diagnosis. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.82.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Detection of antibodies by ELISA for verifying exposure to dengue virus (DENV) and Zika virus (ZIKV) has been a challenge. Point-of-care (POC) diagnostics with detection of very low concentrations of viral antigens would improve critical disease staging and surveillance to reduce morbidity and mortality. LAMPoles are protein-DNA hybrids where a ‘DNA barcode’ is covalently linked to a single site on a protein. Recombinant camelid nanobodies (Nb), which are variable region of the heavy chain antigen binding domain (VHH), can be tailored to bind almost any molecular target to maximize assay sensitivity and specificity. LAMPole fusions displaying Nb that bind ZIKV and DENV antigens will improve the sensitivity and specificity of virus antigen measurement at the POC. Llama were vaccinated with recombinant DENV envelope or ZIKV NS1 proteins and VHH phagemid libraries constructed and screened for DENV and ZIKV antigen-specific Nb. For DENV 70 full-length Nb were identified, belonging to 26 different CDR3 groups. For ZIKV 63 full-length anti-ZIKV Nb were identified, belonging to 42 different CDR3 groups. Nb screened by surface plasmon resonance spectroscopy with Koff kinetics in the 10−3 sec range were conjugated to chalcone synthase specific DNA elements using psoralen-based photocross-linkers. In a pilot experiment, LAMP targeting the CHS DNA tail of one Nb-LAMPole detected less than 10 fg of Nb-LAMPole protein. Nb-LAMPole recognized DENV-2 E-protein antigen in sandwich ELISA and in DENV-2 infected cells by immunofluorescence. We assert that LAMPole fusions displaying Nb that bind viral antigens may improve the sensitivity and specificity of DENV and ZIKV antigen detection that will facilitate markedly improved POC diagnosis.
Collapse
Affiliation(s)
- Dennis J Grab
- 1Uniformed Services University of the Health Sciences
- 2Johns Hopkins University School of Medicine
| | - Anuj Sharma
- 1Uniformed Services University of the Health Sciences
| | - Ian Burbulis
- 3Universidad San Sebastian, Chile
- 4University of Virginia
| | | | | | - Stefan Magez
- 6Ghent University Global Campus, South Korea
- 7Vrije Universiteit Brussel, Belgium
| |
Collapse
|
7
|
Westermeier F, Holyoak T, Asenjo JL, Gatica R, Nualart F, Burbulis I, Bertinat R. Gluconeogenic Enzymes in β-Cells: Pharmacological Targets for Improving Insulin Secretion. Trends Endocrinol Metab 2019; 30:520-531. [PMID: 31213347 DOI: 10.1016/j.tem.2019.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 05/14/2019] [Accepted: 05/16/2019] [Indexed: 02/06/2023]
Abstract
Pancreatic β-cells express the gluconeogenic enzymes glucose 6-phosphatase (G6Pase), fructose 1,6-bisphosphatase (FBP), and phosphoenolpyruvate (PEP) carboxykinase (PCK), which modulate glucose-stimulated insulin secretion (GSIS) through their ability to reverse otherwise irreversible glycolytic steps. Here, we review current knowledge about the expression and regulation of these enzymes in the context of manipulating them to improve insulin secretion in diabetics. Because the regulation of gluconeogenic enzymes in β-cells is so poorly understood, we propose novel research avenues to study these enzymes as modulators of insulin secretion and β-cell dysfunction, with especial attention to FBP, which constitutes an attractive target with an inhibitor under clinical evaluation at present.
Collapse
Affiliation(s)
- Francisco Westermeier
- FH JOANNEUM Gesellschaft mbH University of Applied Sciences, Institute of Biomedical Science, Eggenberger Allee 13, 8020 Graz, Austria
| | - Todd Holyoak
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Joel L Asenjo
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Independencia 631, 5110566 Valdivia, Chile
| | - Rodrigo Gatica
- Escuela de Veterinaria, Facultad de Ciencias, Universidad Mayor, La Pirámide 5750, 8580745 Santiago, Chile
| | - Francisco Nualart
- Centro de Microscopía Avanzada, CMA BIO, Facultad de Ciencias Biológicas, Universidad de Concepción, Casilla 160 C, 4030000 Concepción, Chile
| | - Ian Burbulis
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Virginia, Jordan Hall Room 6022, 1340 Jefferson Park Avenue, Charlottesville, VA 22908, USA; Escuela de Medicina, Universidad San Sebastián, Sede Patagonia, Lago Panguipulli 1390, 5501842 Puerto Montt, Chile
| | - Romina Bertinat
- Centro de Microscopía Avanzada, CMA BIO, Facultad de Ciencias Biológicas, Universidad de Concepción, Casilla 160 C, 4030000 Concepción, Chile.
| |
Collapse
|
8
|
Westermeier F, Holyoak T, Gatica R, Martínez F, Negrón M, Yáñez AJ, Nahmias D, Nualart F, Burbulis I, Bertinat R. Cytosolic phosphoenolpyruvate carboxykinase is expressed in α-cells from human and murine pancreas. J Cell Physiol 2019; 235:166-175. [PMID: 31180589 DOI: 10.1002/jcp.28955] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 05/24/2019] [Indexed: 12/16/2022]
Abstract
The pancreatic islets of Langerhans, mainly formed by glucagon-producing α-cells and insulin-producing β-cells, are critical for glucose homeostasis. Insulin and glucagon oppositely modulate blood glucose levels in health, but a combined decline in insulin secretion together with increased glucagon secretion contribute to hyperglycemia in diabetes. Despite this bi-hormonal dysregulation, most studies have focused on insulin secretion and much less is known about glucagon secretion. Therefore, a deeper understanding of α-cell metabolism and glucagon secretion is of great interest. Here, we show that phosphoenolpyruvate carboxykinase (PCK1), an essential cataplerotic enzyme involved in metabolism and long considered to be absent from the pancreatic islet, is expressed in pancreatic α-cells of both murine and human. Furthermore, PCK1 transcription is induced by fasting and diabetes in rat pancreas, which indicates that the PCK1 activity is required for α-cell adaptation to different metabolic states. To our knowledge, this is the first evidence implicating PCK1 expression in α-cell metabolism.
Collapse
Affiliation(s)
- Francisco Westermeier
- FH JOANNEUM Gesellschaft mbH University of Applied Sciences, Institute of Biomedical Science, Department of Health Studies, Graz, Austria
| | - Todd Holyoak
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| | - Rodrigo Gatica
- Escuela de Veterinaria, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Fernando Martínez
- Centro de Microscopía Avanzada, CMA-BIO BIO, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Marianne Negrón
- Centro de Microscopía Avanzada, CMA-BIO BIO, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Alejandro J Yáñez
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Daniel Nahmias
- Anatomía patológica, Hospital Puerto Montt, Puerto Montt, Chile
| | - Francisco Nualart
- Centro de Microscopía Avanzada, CMA-BIO BIO, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Ian Burbulis
- Department of Biochemistry and Molecular Genetics, School of Medicine, University of Virginia, Charlottesville, Virginia.,Escuela de Medicina, Universidad San Sebastián, Sede de la Patagonia, Puerto Montt, Chile
| | - Romina Bertinat
- Centro de Microscopía Avanzada, CMA-BIO BIO, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| |
Collapse
|
9
|
Flanigon J, Kamali-Moghaddam M, Burbulis I, Annink C, Steffen M, Oeth P, Brent R, van den Boom D, Landegren U, Cantor C. Multiplex protein detection with DNA readout via mass spectrometry. N Biotechnol 2012. [PMID: 23201185 DOI: 10.1016/j.nbt.2012.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Multiplex protein quantification has been constrained by issues of assay specificity, sensitivity and throughput. This research presents a novel approach that overcomes these limitations using antibody-oligonucleotide conjugates for immuno-polymerase chain reaction (immuno-PCR) or proximity ligation, coupled with competitive PCR and MALDI-TOF mass spectrometry. Employing these combinations of technologies, we demonstrate multiplex detection and quantification of up to eight proteins, spanning wide dynamic ranges from femtomolar concentrations, using only microliter sample volumes.
Collapse
Affiliation(s)
- James Flanigon
- Center for Advanced Biotechnology, Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Abstract
Here we present a set of resources (bacterial expression plasmids and antibodies) for the interrogation of proteins involved in yeast MAPK signalling. We constructed bacterial protein expression plasmids for 25 proteins involved in MAPK signalling in budding yeast. From these constructs we expressed and purified proteins and generated rabbit polyclonal antibodies against 13 proteins in the pheromone MAPK pathway. We verified the specificity of the antibodies and employed them to follow pathway proteins in cells stimulated with pheromone. We show that these reagents can be used to detect pheromone-induced post-translational modifications and changes in the oligomeric state of pathway proteins. In addition to recognizing their target proteins in Saccharomyces cerevisiae, these antibodies allow the detection of predicted orthologues in the distant evolutionary relatives Kluyveromyces lactis and Schizosaccharomyces pombe. These antibodies are new tools for investigating MAPK signalling in model yeast species and may be useful for studying MAPK signalling in higher eukaryotes.
Collapse
Affiliation(s)
- David Pincus
- Molecular Sciences Institute, 2168 Shattuck Avenue, Berkeley, CA 94704, USA
| | | | | | | | | |
Collapse
|
11
|
Burbulis I, Yamaguchi K, Yu R, Resnekov O, Brent R. Quantifying small numbers of antibodies with a 'near-universal' protein-DNA chimera. Nat Methods 2007; 4:1011-3. [PMID: 17982460 DOI: 10.1038/nmeth1127] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2007] [Accepted: 10/10/2007] [Indexed: 12/31/2022]
Abstract
We present general means to greatly increase the sensitivity of antibody-based assays. Augmentation relies on a 'tadpole' protein-DNA chimera whose protein moiety binds most classes of mammalian antibodies but not avian immunoglobulin Y (IgY). We used this tadpole in affinity capture assays followed by real-time PCR to quantify numerous molecules, including prostate-specific antigen (PSA) in human serum, with great sensitivity and accuracy.
Collapse
Affiliation(s)
- Ian Burbulis
- Center for Quantitative Genome Function and Molecular Sciences Institute, 2168 Shattuck Avenue, Berkeley, California 94704, USA
| | | | | | | | | |
Collapse
|
12
|
Burbulis I, Yamaguchi K, Gordon A, Carlson R, Brent R. Using protein-DNA chimeras to detect and count small numbers of molecules. Nat Methods 2004; 2:31-7. [PMID: 15782158 DOI: 10.1038/nmeth729] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [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: 11/06/2004] [Accepted: 11/24/2004] [Indexed: 01/31/2023]
Abstract
We describe general methods to detect and quantify small numbers of specific molecules. We redirected self-splicing protein inteins to create 'tadpoles', chimeric molecules comprised of a protein head covalently coupled to an oligonucleotide tail. We made different classes of tadpoles that bind specific targets, including Bacillus anthracis protective antigen and the enzyme cofactor biotin. We measured the amount of bound target by quantifying DNA tails by T7 RNA polymerase runoff transcription and real-time polymerase chain reaction (PCR) evaluated by rigorous statistical methods. These assays had a dynamic range of detection of more than 11 orders of magnitude and distinguished numbers of molecules that differed by as little as 10%. At their low limit, these assays were used to detect as few as 6,400 protective antigen molecules, 600 biotin molecules and 150 biotinylated protein molecules. In crudely fractionated human serum, the assays were used to detect as few as 32,000 protective antigen molecules. Tadpoles thus enable sensitive detection and precise quantification of molecules other than DNA and RNA.
Collapse
Affiliation(s)
- Ian Burbulis
- The Molecular Sciences Institute, 2168 Shattuck Avenue, Berkeley, California 94704, USA.
| | | | | | | | | |
Collapse
|