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Liu Y, Li Y, Wei X, Ullah I, Uddin S, Wang J, Xia R, Wang M, Yang H, Li H. A comparative study on the effects of human serum albumin and α-melanocyte-stimulating hormone fusion proteins on the anti-neuroinflammatory in the central nervous system of adult mice. Neuropeptides 2024; 104:102410. [PMID: 38308948 DOI: 10.1016/j.npep.2024.102410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 02/05/2024]
Abstract
The immunomodulatory effects of α-melanocyte stimulating hormone (α-MSH) in the central nervous system (CNS) have been investigated for forty years. The clinical applications of α-MSH are limited due to its short half-life. Our previous study has indicated that the short half-life of α-MSH can be extended by fusion with carrier human serum albumin (HSA) and this fusion protein has also retained the anti-inflammatory effect on the CNS. This improvement is still far from the clinical requirements. Thus, we expected to enhance the half-life and activity of the fusion protein by optimizing the linker peptide to get closer to clinical requirements. In a previous study, we screened out two candidates in vitro experiments with a flexible linker peptide (fusion protein with flexible linker peptide, FPFL) and a rigid linker peptide (fusion protein with rigid linker peptide, FPRL), respectively. However, it was not sure whether the anti-inflammatory effects in vitro could be reproduced in vivo. Our results show that FPRL is the best candidate with a longer half-life compared to the traditional flexible linker peptides. Meanwhile, the ability of FPRL to penetrate the blood-brain barrier (BBB) was enhanced, and the inhibition of TNF-α and IL-6 was improved. We also found that the toxicity of FPRL was decreased. All of the results suggested that trying to choose the rigid linker peptide in some fusion proteins may be a potential choice for improving the unsatisfactory characteristics.
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Affiliation(s)
- Yiyao Liu
- Biopharmaceutical International Science and Technology Cooperation Base, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Yang Li
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Xueyan Wei
- Biopharmaceutical International Science and Technology Cooperation Base, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Inam Ullah
- Biopharmaceutical International Science and Technology Cooperation Base, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Shahab Uddin
- Biopharmaceutical International Science and Technology Cooperation Base, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Jiatao Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Runjie Xia
- Biopharmaceutical International Science and Technology Cooperation Base, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Meizhu Wang
- Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Hui Yang
- Institute of Biology, Gansu Academy of Sciences, Dingxi Road No. 229, Lanzhou 730000, Gansu Province, People's Republic of China
| | - Hongyu Li
- Biopharmaceutical International Science and Technology Cooperation Base, School of Life Sciences, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China; Gansu High Throughput Screening and Creation Center for Health Products, School of Pharmacy, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, Gansu Province, People's Republic of China.
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Stavchansky VV, Yuzhakov VV, Sevan'kaeva LE, Fomina NK, Koretskaya AE, Denisova AE, Mozgovoy IV, Gubsky LV, Filippenkov IB, Myasoedov NF, Limborska SA, Dergunova LV. Melanocortin Derivatives Induced Vascularization and Neuroglial Proliferation in the Rat Brain under Conditions of Cerebral Ischemia. Curr Issues Mol Biol 2024; 46:2071-2092. [PMID: 38534749 DOI: 10.3390/cimb46030133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024] Open
Abstract
Stroke remains the second leading cause of death worldwide. The development of new therapeutic agents focused on restoring vascular function and neuroprotection of viable tissues is required. In this study the neuroprotective activity of melanocortin-like ACTH(4-7)PGP and ACTH(6-9)PGP peptides was investigated in rat brain at 24 h after transient middle cerebral artery occlusion (tMCAO). The severity of ischemic damage, changes in the proliferative activity of neuroglial cells and vascularization of rat brain tissue were analyzed. The administration of peptides resulted in a significant increase in the volume density of neurons in the perifocal zone of infarction compared to rats subjected to ischemia and receiving saline. Immunohistochemical analysis of the proliferative activity of neuroglia cells using PCNA antibodies showed a significant increase in the number of proliferating cells in the penumbra and in the intact cerebral cortex of rats receiving peptide treatment. The effect of peptides on vascularization was examined using CD31 antibodies under tMCAO conditions, revealing a significant increase in the volume density of vessels and their sizes in the penumbra after administration of ACTH(4-7)PGP and ACTH(6-9)PGP. These findings confirm the neuroprotective effect of peptides due to the activation of neuroglia proliferation and the enhancement of collateral blood flow.
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Affiliation(s)
- Vasily V Stavchansky
- National Research Center "Kurchatov Institute", Kurchatov Sq. 2, Moscow 123182, Russia
| | - Vadim V Yuzhakov
- A. Tsyb Medical Radiological Research Center-Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str. 4B, Obninsk 249036, Russia
| | - Larisa E Sevan'kaeva
- A. Tsyb Medical Radiological Research Center-Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str. 4B, Obninsk 249036, Russia
| | - Natalia K Fomina
- A. Tsyb Medical Radiological Research Center-Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str. 4B, Obninsk 249036, Russia
| | - Anastasia E Koretskaya
- A. Tsyb Medical Radiological Research Center-Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, Koroleva Str. 4B, Obninsk 249036, Russia
| | - Alina E Denisova
- Department of Neurology, Neurosurgery and Medical Genetics, Pirogov Russian National Research Medical University, Ostrovitianov Str. 1, Moscow 117997, Russia
| | - Ivan V Mozgovoy
- National Research Center "Kurchatov Institute", Kurchatov Sq. 2, Moscow 123182, Russia
| | - Leonid V Gubsky
- Department of Neurology, Neurosurgery and Medical Genetics, Pirogov Russian National Research Medical University, Ostrovitianov Str. 1, Moscow 117997, Russia
| | - Ivan B Filippenkov
- National Research Center "Kurchatov Institute", Kurchatov Sq. 2, Moscow 123182, Russia
| | - Nikolay F Myasoedov
- National Research Center "Kurchatov Institute", Kurchatov Sq. 2, Moscow 123182, Russia
| | - Svetlana A Limborska
- National Research Center "Kurchatov Institute", Kurchatov Sq. 2, Moscow 123182, Russia
| | - Lyudmila V Dergunova
- National Research Center "Kurchatov Institute", Kurchatov Sq. 2, Moscow 123182, Russia
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Zhang S, Zhang Y, Wen Z, Yang Y, Bu T, Bu X, Ni Q. Cognitive dysfunction in diabetes: abnormal glucose metabolic regulation in the brain. Front Endocrinol (Lausanne) 2023; 14:1192602. [PMID: 37396164 PMCID: PMC10312370 DOI: 10.3389/fendo.2023.1192602] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 05/25/2023] [Indexed: 07/04/2023] Open
Abstract
Cognitive dysfunction is increasingly recognized as a complication and comorbidity of diabetes, supported by evidence of abnormal brain structure and function. Although few mechanistic metabolic studies have shown clear pathophysiological links between diabetes and cognitive dysfunction, there are several plausible ways in which this connection may occur. Since, brain functions require a constant supply of glucose as an energy source, the brain may be more susceptible to abnormalities in glucose metabolism. Glucose metabolic abnormalities under diabetic conditions may play an important role in cognitive dysfunction by affecting glucose transport and reducing glucose metabolism. These changes, along with oxidative stress, inflammation, mitochondrial dysfunction, and other factors, can affect synaptic transmission, neural plasticity, and ultimately lead to impaired neuronal and cognitive function. Insulin signal triggers intracellular signal transduction that regulates glucose transport and metabolism. Insulin resistance, one hallmark of diabetes, has also been linked with impaired cerebral glucose metabolism in the brain. In this review, we conclude that glucose metabolic abnormalities play a critical role in the pathophysiological alterations underlying diabetic cognitive dysfunction (DCD), which is associated with multiple pathogenic factors such as oxidative stress, mitochondrial dysfunction, inflammation, and others. Brain insulin resistance is highly emphasized and characterized as an important pathogenic mechanism in the DCD.
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Affiliation(s)
| | | | | | | | | | | | - Qing Ni
- Department of Endocrinology, Guang’ anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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Goit RK, Taylor AW, Lo ACY. Anti-inflammatory α-Melanocyte-Stimulating Hormone Protects Retina After Ischemia/Reperfusion Injury in Type I Diabetes. Front Neurosci 2022; 16:799739. [PMID: 35281489 PMCID: PMC8914517 DOI: 10.3389/fnins.2022.799739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/19/2022] [Indexed: 11/13/2022] Open
Abstract
Retinal ischemia/reperfusion (I/R) injury is a major cause of vision loss in many ocular diseases. Retinal I/R injury is common in diabetic retinopathy, which as a result of hyperglycemia damages the retina and can cause blindness if left untreated. Inflammation is a major contributing factor in the pathogenesis of I/R injury. α-Melanocyte-stimulating hormone (α-MSH) is an anti-inflammatory peptide hormone that has displayed protective effects against I/R-induced organ damages. Here, we aimed to investigate the protective role of α-MSH on I/R-induced diabetic retinal damage using hyperglycemic C57BL/6J Ins2Akita/+ mice. Experimental I/R injury was induced by blocking the right middle cerebral artery (MCA) for 2 h followed by 2 h or 22 h of reperfusion using the intraluminal method. Since ophthalmic artery originates proximal to the origin of the MCA, the filament also blocked blood supply to the retina. Upon treatment with α-MSH at 1 h after ischemia and 1 h after reperfusion, animals displayed significant improvement in amplitudes of b-wave and oscillatory potentials during electroretinography. α-MSH also prevented I/R-induced histological alterations and inhibited the development of retinal swelling. Loss of retinal ganglion cells as well as oxidative stress were significantly attenuated in the α-MSH-treated retinae. Level of interleukin 10 was significantly increased after α-MSH treatment. Moreover, gene expression of glutamate aspartate transporter 1, monocarboxylate transporter (MCT) 1 and MCT-2 were significantly higher after α-MSH administration. In conclusion, α-MSH mitigates the severity of I/R-induced retinal damage under hyperglycemic condition. These beneficial effects of α-MSH may have important therapeutic implications against retinal I/R injury under hyperglycemic condition.
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Affiliation(s)
- Rajesh Kumar Goit
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Andrew W. Taylor
- Department of Ophthalmology, Boston University School of Medicine, Boston, MA, United States
| | - Amy C. Y. Lo
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- *Correspondence: Amy C. Y. Lo, , orcid.org/0000-0003-4239-6851
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