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Virág D, Schlosser G, Borbély A, Gellén G, Papp D, Kaleta Z, Dalmadi-Kiss B, Antal I, Ludányi K. A Mass Spectrometry Strategy for Protein Quantification Based on the Differential Alkylation of Cysteines Using Iodoacetamide and Acrylamide. Int J Mol Sci 2024; 25:4656. [PMID: 38731875 PMCID: PMC11083099 DOI: 10.3390/ijms25094656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/15/2024] [Accepted: 04/21/2024] [Indexed: 05/13/2024] Open
Abstract
Mass spectrometry has become the most prominent yet evolving technology in quantitative proteomics. Today, a number of label-free and label-based approaches are available for the relative and absolute quantification of proteins and peptides. However, the label-based methods rely solely on the employment of stable isotopes, which are expensive and often limited in availability. Here we propose a label-based quantification strategy, where the mass difference is identified by the differential alkylation of cysteines using iodoacetamide and acrylamide. The alkylation reactions were performed under identical experimental conditions; therefore, the method can be easily integrated into standard proteomic workflows. Using high-resolution mass spectrometry, the feasibility of this approach was assessed with a set of tryptic peptides of human serum albumin. Several critical questions, such as the efficiency of labeling and the effect of the differential alkylation on the peptide retention and fragmentation, were addressed. The concentration of the quality control samples calculated against the calibration curves were within the ±20% acceptance range. It was also demonstrated that heavy labeled peptides exhibit a similar extraction recovery and matrix effect to light ones. Consequently, the approach presented here may be a viable and cost-effective alternative of stable isotope labeling strategies for the quantification of cysteine-containing proteins.
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Affiliation(s)
- Dávid Virág
- Department of Pharmaceutics, Semmelweis University, Hőgyes Endre utca 7., H-1092 Budapest, Hungary; (D.V.); (B.D.-K.); (I.A.)
| | - Gitta Schlosser
- MTA-ELTE Lendület Ion Mobility Mass Spectrometry Research Group, Institute of Chemistry, Faculty of Science, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary; (G.S.); (A.B.); (G.G.); (D.P.)
| | - Adina Borbély
- MTA-ELTE Lendület Ion Mobility Mass Spectrometry Research Group, Institute of Chemistry, Faculty of Science, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary; (G.S.); (A.B.); (G.G.); (D.P.)
| | - Gabriella Gellén
- MTA-ELTE Lendület Ion Mobility Mass Spectrometry Research Group, Institute of Chemistry, Faculty of Science, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary; (G.S.); (A.B.); (G.G.); (D.P.)
| | - Dávid Papp
- MTA-ELTE Lendület Ion Mobility Mass Spectrometry Research Group, Institute of Chemistry, Faculty of Science, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary; (G.S.); (A.B.); (G.G.); (D.P.)
- Hevesy György PhD School of Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
| | - Zoltán Kaleta
- Department of Organic Chemistry, Semmelweis University, Hőgyes Endre utca 7., H-1092 Budapest, Hungary;
| | - Borbála Dalmadi-Kiss
- Department of Pharmaceutics, Semmelweis University, Hőgyes Endre utca 7., H-1092 Budapest, Hungary; (D.V.); (B.D.-K.); (I.A.)
| | - István Antal
- Department of Pharmaceutics, Semmelweis University, Hőgyes Endre utca 7., H-1092 Budapest, Hungary; (D.V.); (B.D.-K.); (I.A.)
| | - Krisztina Ludányi
- Department of Pharmaceutics, Semmelweis University, Hőgyes Endre utca 7., H-1092 Budapest, Hungary; (D.V.); (B.D.-K.); (I.A.)
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2
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Fricker LD. Quantitative Peptidomics: General Considerations. Methods Mol Biol 2024; 2758:89-108. [PMID: 38549010 DOI: 10.1007/978-1-0716-3646-6_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Peptidomics is the detection and identification of the peptides present in a sample, and quantitative peptidomics provides additional information about the amounts of these peptides. It is possible to perform absolute quantitation of peptide levels in which the biological sample is compared to synthetic standards of each peptide. More commonly, relative quantitation is performed to compare peptide levels between two or more samples. Relative quantitation can measure differences between all peptides that are detectable, which can exceed 1000 peptides in a complex sample. In this chapter, various techniques used for quantitative peptidomics are described along with discussion of the advantages and disadvantages of each approach. A guide to selecting the optimal quantitative approach is provided, based on the goals of the experiment and the resources that are available.
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Affiliation(s)
- Lloyd D Fricker
- Departments of Molecular Pharmacology and Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA.
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3
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Phetsanthad A, Vu NQ, Yu Q, Buchberger AR, Chen Z, Keller C, Li L. Recent advances in mass spectrometry analysis of neuropeptides. MASS SPECTROMETRY REVIEWS 2023; 42:706-750. [PMID: 34558119 PMCID: PMC9067165 DOI: 10.1002/mas.21734] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 08/22/2021] [Accepted: 08/28/2021] [Indexed: 05/08/2023]
Abstract
Due to their involvement in numerous biochemical pathways, neuropeptides have been the focus of many recent research studies. Unfortunately, classic analytical methods, such as western blots and enzyme-linked immunosorbent assays, are extremely limited in terms of global investigations, leading researchers to search for more advanced techniques capable of probing the entire neuropeptidome of an organism. With recent technological advances, mass spectrometry (MS) has provided methodology to gain global knowledge of a neuropeptidome on a spatial, temporal, and quantitative level. This review will cover key considerations for the analysis of neuropeptides by MS, including sample preparation strategies, instrumental advances for identification, structural characterization, and imaging; insightful functional studies; and newly developed absolute and relative quantitation strategies. While many discoveries have been made with MS, the methodology is still in its infancy. Many of the current challenges and areas that need development will also be highlighted in this review.
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Affiliation(s)
- Ashley Phetsanthad
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Nhu Q. Vu
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Qing Yu
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, USA
| | - Amanda R. Buchberger
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Zhengwei Chen
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Caitlin Keller
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Lingjun Li
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, USA
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4
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Sobrido-Cameán D, Yáñez-Guerra LA, Deber A, Freire-Delgado M, Cacheiro-Vázquez R, Rodicio MC, Tostivint H, Anadón R, Barreiro-Iglesias A. Differential expression of somatostatin genes in the central nervous system of the sea lamprey. Brain Struct Funct 2021; 226:1031-1052. [PMID: 33532926 DOI: 10.1007/s00429-021-02224-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 01/19/2021] [Indexed: 01/29/2023]
Abstract
The identification of three somatostatin (SST) genes (SSTa, SSTb, and SSTc) in lampreys (Tostivint et al. Gen Comp Endocrinol 237:89-97 https://doi.org/10.1016/j.ygcen.2016.08.006 , 2016) prompted us to study their expression in the brain and spinal cord of the sea lamprey by in situ hybridization. These three genes were only expressed in equivalent neuronal populations in the hypothalamus. In other regions, SST transcripts showed clear differential expression. In the telencephalon, SSTc-positive cells were observed in the medial pallium, ventral part of the lateral pallium, striatum, subhippocampal lobe, and preoptic region. In the diencephalon, SSTa-positive cells were observed in the thalamus and SSTc-positive cells in the prethalamus, posterior tubercle, pretectal area, and nucleus of the medial longitudinal fascicle. In the midbrain, SSTc-positive cells were observed in the torus semicircularis, lateral reticular area, and perioculomotor tegmentum. Different SSTa- and SSTc-positive populations were observed in the isthmus. SSTc neurons were also observed in the rostral octavolateralis area and caudal rhombencephalon. In the spinal cord, SSTa was expressed in cerebrospinal-fluid-contacting (CSF-c) neurons and SSTc in non-CSF-c interneurons. Comparison with previous immunohistochemical studies using anti-SST-14 antibodies strongly suggests that SST-14-like neurons correspond with the SSTa populations. Thus, the SSTc populations were not reported previously in immunohistochemical studies. Cluster-based analyses and alignments of mature peptides suggested that SSTa is an ortholog of SST1 and that SSTb is closely related to SST2 and SST6. These results provide important new insights into the evolution of the somatostatinergic system in vertebrates.
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Affiliation(s)
- D Sobrido-Cameán
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain.,Department of Zoology, University of Cambridge, Cambridge, UK
| | | | - A Deber
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - M Freire-Delgado
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - R Cacheiro-Vázquez
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - M C Rodicio
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - H Tostivint
- Molecular Physiology and Adaptation, UMR7221, CNRS and Muséum National D'Histoire Naturelle, Paris, France
| | - R Anadón
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - A Barreiro-Iglesias
- Department of Functional Biology, Faculty of Biology, CIBUS, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain.
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Maher EE, Prillaman ME, Keskinoz EN, Petry HM, Erisir A. Immunocytochemical and ultrastructural organization of the taste thalamus of the tree shrew (Tupaia belangeri). J Comp Neurol 2021; 529:2558-2575. [PMID: 33458823 DOI: 10.1002/cne.25109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 12/28/2020] [Accepted: 01/10/2021] [Indexed: 12/16/2022]
Abstract
Ventroposterior medialis parvocellularis (VPMP) nucleus of the primate thalamus receives direct input from the nucleus of the solitary tract, whereas the homologous thalamic structure in the rodent does not. To reveal whether the synaptic circuitries in these nuclei lend evidence for conservation of design principles in the taste thalamus across species or across sensory thalamus in general, we characterized the ultrastructural and molecular properties of the VPMP in a close relative of primates, the tree shrew (Tupaia belangeri), and compared these to known properties of the taste thalamus in rodent, and the visual thalamus in mammals. Electron microscopy analysis to categorize the synaptic inputs in the VPMP revealed that the largest-size terminals contained many vesicles and formed large synaptic zones with thick postsynaptic density on multiple, medium-caliber dendrite segments. Some formed triads within glomerular arrangements. Smaller-sized terminals contained dark mitochondria; most formed a single asymmetric or symmetric synapse on small-diameter dendrites. Immuno-EM experiments revealed that the large-size terminals contained VGLUT2, whereas the small-size terminal populations contained VGLUT1 or ChAT. These findings provide evidence that the morphological and molecular characteristics of synaptic circuitry in the tree shrew VPMP are similar to that in nonchemical sensory thalamic nuclei. Furthermore, the results indicate that all primary sensory nuclei of the thalamus in higher mammals share a structural template for processing thalamocortical sensory information. In contrast, substantial morphological and molecular differences in rodent versus tree shrew taste nuclei suggest a fundamental divergence in cellular processing mechanisms of taste input in these two species.
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Affiliation(s)
- Erin E Maher
- Department of Psychology, University of Virginia, Charlottesville, Virginia, USA
| | - McKenzie E Prillaman
- Department of Psychology, University of Virginia, Charlottesville, Virginia, USA
| | - Elif N Keskinoz
- Department of Psychology, University of Virginia, Charlottesville, Virginia, USA.,Department of Anatomy, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Heywood M Petry
- Department of Psychological and Brain Sciences, University of Louisville, Louisville, Kentucky, USA
| | - Alev Erisir
- Department of Psychology, University of Virginia, Charlottesville, Virginia, USA
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6
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Li L, Li Y, Li X, Xia Y, Wang E, Gong D, Chen G, Yang L, Zhang K, Zhao Z, Fraser NW, Fan Q, Li B, Zhang H, Cao X, Zhou J. HSV-1 infection and pathogenesis in the tree shrew eye following corneal inoculation. J Neurovirol 2020; 26:391-403. [PMID: 32301037 DOI: 10.1007/s13365-020-00837-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/07/2020] [Accepted: 03/09/2020] [Indexed: 11/27/2022]
Abstract
Herpes simplex virus type I (HSV-1) infection causes inflammation in the cornea known as herpes simplex virus keratitis (HSK), a common but serious corneal disease. It is not entirely clear whether the virus during recurring infection comes from the trigeminal ganglia or the eye tissue, including the retina and ciliary ganglion. Because the tree shrew is closely related to primates and tree shrew eye anatomic structures are similar to humans, we studied HSV-1 corneal infection in the tree shrew. We found that HSK symptoms closely mimic those found in human HSK showing typical punctiform and dendritic viral keratitis during the acute infection period. Following the HSV-specific lesions, complications such as stromal scarring, corneal thickening (primary infection), opacity, and neovascularization were observed. In the tree shrew model, following ocular inoculation, the cornea becomes infected, and viral protein can be detected using anti-HSV-1 antibodies in the epithelial layer and retina neuronal ganglion cells. The HSV-1 transcripts, ICP0, ICP4, and LAT can be detected at 3 days post-infection (dpi), peaking at 5 dpi. After 2 weeks, ICP4 and ICP0 transcripts are reduced to a basal level, but the Latency Associated Transcripts (LATs) continue to accumulate. Interestingly, after the acute infection, we still detected abundant active HSV-1 in tree shrew eyes. Further, we found HSV-1 persistent in the ciliary ganglion and cornea. These findings are discussed in support of the tree shrew as a non-human primate HSK model, which could be useful for mechanistic studies of HSK.
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Affiliation(s)
- Lihong Li
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China.,Center for Disease Control and Prevention of Western Theater Command, Chengdu, 610021, Sichuan, China.,Kunming Primate Research Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, Yunnan, China.,Center for Drug Safety Evaluation, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
| | - Yan Li
- Department of Ophthalmology, The Second People Hospital of Yunnan Province, Kunming, 650031, Yunnan, China
| | - Xin Li
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
| | - Yujie Xia
- Center for Drug Safety Evaluation, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, Yunnan, China.,Qingdao Haihua Biomedicine Technology Co. Ltd, Qingdao, 266555, Shandong, China
| | - Erlin Wang
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
| | - Daohua Gong
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
| | - Guijun Chen
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
| | - Liping Yang
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China
| | - Ke Zhang
- Department of Key Laboratory, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Zhuanghong Zhao
- Department of Ophthalmology, The First Affiliated Hospital of Kunming Medical University, Kunming, 650032, Yunnan, China
| | - Nigel W Fraser
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Quanshui Fan
- Center for Disease Control and Prevention of Western Theater Command, Chengdu, 610021, Sichuan, China.
| | - Bing Li
- Kunming Primate Research Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, Yunnan, China. .,Center for Drug Safety Evaluation, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, Yunnan, China.
| | - Hui Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Kunming Medical University, Kunming, 650032, Yunnan, China.
| | - Xia Cao
- Department of Key Laboratory, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China.
| | - Jumin Zhou
- Key Laboratory of Animal Models and Human Disease Mechanism of the Chinese Academy of Science/Key Laboratory of Healthy Aging Research of Yunnan Province, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, Yunnan, China.
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Abstract
The tree shrew (Tupaia belangeri) is a promising laboratory animal that possesses a closer genetic relationship to primates than to rodents. In addition, advantages such as small size, easy breeding, and rapid reproduction make the tree shrew an ideal subject for the study of human disease. Numerous tree shrew disease models have been generated in biological and medical studies in recent years. Here we summarize current tree shrew disease models, including models of infectious diseases, cancers, depressive disorders, drug addiction, myopia, metabolic diseases, and immune-related diseases. With the success of tree shrew transgenic technology, this species will be increasingly used in biological and medical studies in the future.
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Affiliation(s)
- Ji Xiao
- Medical Faculty of Kunming University of Science and Technology, Kunming Yunnan 650500, China; Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Rong Liu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Ce-Shi Chen
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China.
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8
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Abstract
Peptidomics is the detection and identification of the peptides present in a sample, while quantitative peptidomics provides additional information about the amounts of these peptides. Comparison of peptide levels among two or more samples is termed relative quantitation. It is also possible to perform absolute quantitation of peptide levels in which the biological sample is compared to synthetic standards, which requires a separate standard for each peptide. In contrast, relative quantitation can compare levels of all peptides that are detectable in a sample, which can exceed 1000 peptides in a complex sample. In this chapter, various techniques used for quantitative peptidomics are described along with discussion of the advantages and disadvantages of each approach. A guide to selecting the optimal quantitative approach is provided, based on the goals of the experiment and the resources that are available.
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Affiliation(s)
- Lloyd Fricker
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA.
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9
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Romanova EV, Sweedler JV. Peptidomics for the discovery and characterization of neuropeptides and hormones. Trends Pharmacol Sci 2015; 36:579-86. [PMID: 26143240 DOI: 10.1016/j.tips.2015.05.009] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 05/28/2015] [Accepted: 05/29/2015] [Indexed: 12/31/2022]
Abstract
The discovery of neuropeptides as signaling molecules with paracrine or hormonal regulatory functions has led to trailblazing advances in physiology and fostered the characterization of numerous neuropeptide-binding G protein-coupled receptors (GPCRs) as potential drug targets. The impact on human health has been tremendous: approximately 30% of commercial drugs act via the GPCR pathway. However, about 25% of the GPCRs encoded by the mammalian genome still lack their pharmacological identity. Searching for the orphan GPCR endogenous ligands that are likely to be neuropeptides has proved to be a formidable task. Here we describe the mass spectrometry (MS)-based technologies and experimental strategies that have been successful in achieving high-throughput characterization of endogenous peptides in nervous and endocrine systems.
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Affiliation(s)
- Elena V Romanova
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL 61801, USA; Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jonathan V Sweedler
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL 61801, USA; Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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Shen F, Duan Y, Jin S, Sui N. Varied behavioral responses induced by morphine in the tree shrew: a possible model for human opiate addiction. Front Behav Neurosci 2014; 8:333. [PMID: 25294994 PMCID: PMC4171994 DOI: 10.3389/fnbeh.2014.00333] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/05/2014] [Indexed: 01/27/2023] Open
Abstract
Tree shrews represent a suitable animal model to study the pathogenesis of human diseases as they are phylogenetically close to primates and have a well-developed central nervous system that possesses many homologies with primates. Therefore, in our study, we investigated whether tree shrews can be used to explore the addictive behaviors induced by morphine. Firstly, to investigate the psychoactive effect of morphine on tree shrews’ behavior, the number of jumping and shuttling, which represent the vertical and horizontal locomotor activity respectively, was examined following the injection of different dosage of morphine. Our results showed intramuscular (IM) injection of morphine (5 or 10 mg/kg) significantly increased the locomotor activity of tree shrews 30–60 min post-injection. Then, using the conditioned place preference/aversion (CPP/CPA) paradigm, we found morphine-conditioned tree shrews exhibited place preference in the morphine-paired chamber on the test day. In addition, naloxone-precipitated withdrawal induced place aversion in the chronic morphine-dependent tree shrews. We evaluated the craving for morphine drinking by assessing the break point that reflects the maximum effort animals will expend to get the drug. Our data showed the break point was significantly increased when compared to the baseline on the 1st, 7th and 14th day after the abstinence. Moreover, in the intravenous morphine self-administration experiment, tree shrews conditioned with morphine responded on the active lever significantly more frequently than on the inactive lever after training. These results suggest that tree shrew may be a potential candidate for study the addictive behaviors and the underling neurological mechanisms.
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Affiliation(s)
- Fang Shen
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences Beijing, China
| | - Ying Duan
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences Beijing, China ; Institute of Psychology, University of Chinese Academy of Sciences Beijing, China
| | - Shubo Jin
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences Beijing, China ; Institute of Psychology, University of Chinese Academy of Sciences Beijing, China
| | - Nan Sui
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences Beijing, China
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11
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Schrader M, Schulz-Knappe P, Fricker LD. Historical perspective of peptidomics. EUPA OPEN PROTEOMICS 2014. [DOI: 10.1016/j.euprot.2014.02.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Jia C, Yu Q, Wang J, Li L. Qualitative and quantitative top-down mass spectral analysis of crustacean hyperglycemic hormones in response to feeding. Proteomics 2014; 14:1185-94. [PMID: 24532205 DOI: 10.1002/pmic.201300331] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 12/07/2013] [Accepted: 02/10/2014] [Indexed: 12/13/2022]
Abstract
An efficient pipeline for peptide discovery accelerates peptidomic analysis and facilitates a better understanding of the functional roles of neuropeptides. However, qualitative and quantitative analysis of large neuropeptides is challenging due to the bigger molecular sizes, multiple PTMs, and interference by homologous isoforms. Herein, we refined two methodologies in the pipeline for highly confident and efficient MS-based peptide discovery. For the qualitative analysis, the so-called "high resolution/accurate mass" measurement on Orbitrap mass spectrometers was integrated with computer-assisted homology search, which was successfully applied to decipher the substituted amino acid residues in large neuropeptides by referring to homologous sequences. For the quantitative analysis, a new isotopic labeling-assisted top-down MS strategy was developed, which enabled direct monitoring of the abundance changes of endogenous large neuropeptides. By using the refined peptide discovery pipeline, one novel crustacean hyperglycemic hormone (CHH) from the Dungeness crab sinus glands was confidently identified and de novo sequenced, and its relative abundance was quantified. Comparative analysis of CHHs in unfed and fed crabs revealed that the peptide abundance in the sinus glands was significantly increased after food intake, suggesting that the release of CHHs might be altered by feeding behavior.
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Affiliation(s)
- Chenxi Jia
- School of Pharmacy and Department of Chemistry, University of Wisconsin-Madison, WI, USA
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