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Gamez N, Morales R. Role of peripheral amyloid-β aggregates in Alzheimer's disease: mechanistic, diagnostic, and therapeutic implications. Neural Regen Res 2025; 20:1087-1089. [PMID: 38989944 DOI: 10.4103/nrr.nrr-d-24-00066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/01/2024] [Indexed: 07/12/2024] Open
Affiliation(s)
- Nazaret Gamez
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA (Gamez N, Morales R)
| | - Rodrigo Morales
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, USA (Gamez N, Morales R)
- Centro Integrativo de Biologia y Quimica Aplicada (CIBQA), Universidad Bernardo O'Higgins, Santiago, Chile (Morales R)
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2
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Petralla S, Panayotova M, Franchina E, Fricker G, Puris E. Low-Density Lipoprotein Receptor-Related Protein 1 as a Potential Therapeutic Target in Alzheimer's Disease. Pharmaceutics 2024; 16:948. [PMID: 39065645 PMCID: PMC11279518 DOI: 10.3390/pharmaceutics16070948] [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: 06/14/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease impacting the lives of millions of people worldwide. The formation of amyloid β (Aβ) plagues in the brain is the main pathological hallmark of AD. The Aβ deposits are formed due to the imbalance between the production and Aβ clearance in the brain and across the blood-brain barrier (BBB). In this respect, low-density lipoprotein receptor-related protein 1 (LRP1) plays a significant role by mediating both brain Aβ production and clearance. Due to its important role in AD pathogenesis, LRP1 is considered an attractive drug target for AD therapies. In the present review, we summarize the current knowledge about the role of LRP1 in AD pathogenesis as well as recent findings on changes in LRP1 expression and function in AD. Finally, we discuss the advances in utilizing LRP1 as a drug target for AD treatments as well as future perspectives on LRP1 research.
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Affiliation(s)
| | | | | | | | - Elena Puris
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Im Neuenheimer Feld 329, 69120 Heidelberg, Germany; (S.P.); (M.P.); (E.F.); (G.F.)
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3
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Teipel SJ, Temp AGM, Lutz MW. Bayesian meta-analysis of phase 3 results of aducanumab, lecanemab, donanemab, and high-dose gantenerumab in prodromal and mild Alzheimer's disease. ALZHEIMER'S & DEMENTIA (NEW YORK, N. Y.) 2024; 10:e12454. [PMID: 38389855 PMCID: PMC10883242 DOI: 10.1002/trc2.12454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 01/03/2024] [Accepted: 01/24/2024] [Indexed: 02/24/2024]
Abstract
INTRODUCTION Phase 3 trials using the anti-amyloid antibodies aducanumab, lecanemab, donanemab, and high-dose gantenerumab in prodromal and mild Alzheimer's disease dementia were heterogeneous in respect to statistical significance of effects. However, heterogeneity of results has not yet directly be quantified. METHODS We used Bayesian random effects meta-analysis to quantify evidence for or against a treatment effect, and assessed the size of the effect and its heterogeneity. Data were extracted from published studies where available and Web based data reports, assuming a Gaussian data generation process. RESULTS We found moderate evidence in favor of a treatment effect (Bayes factor = 13.2). The effect was moderate to small with -0.33 (95% credible interval -0.54 to -0.10) points on the Clinical Dementia Rating - Sum of Boxes (CDR-SB) scale. The heterogeneity parameter was low to moderate with 0.21 (0.04 to 0.45) CDR-SB points. DISCUSSION Heterogeneity across studies was moderate despite some trials reaching statistical significance, while others did not. This suggests that the negative aducanumab and gantenerumab trials are in full agreement with the expected effect sizes.
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Affiliation(s)
- Stefan J Teipel
- Working group on clincial dementia research Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE) Rostock Germany
- Department of Psychosomatic Medicine University Medicine Rostock Rostock Germany
| | - Anna G M Temp
- Working group on clincial dementia research Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE) Rostock Germany
- Department of Neurology Berufsgenossenschaftliches Klinikum Hamburg Hamburg Germany
| | - Michael W Lutz
- Department of Neurology Duke University School of Medicine Durham North Carolina USA
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4
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Zhang H, Chen Y, Yu M, Xi Y, Han G, Jin Y, Wang G, Sun X, Zhou J, Ding Y. Nasal delivery of polymeric nanoDisc mobilizes a synergy of central and peripheral amyloid-β clearance to treat Alzheimer's disease. Proc Natl Acad Sci U S A 2023; 120:e2304213120. [PMID: 38085773 PMCID: PMC10743360 DOI: 10.1073/pnas.2304213120] [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: 03/14/2023] [Accepted: 10/05/2023] [Indexed: 12/18/2023] Open
Abstract
The disequilibrium of amyloid β-peptide (Aβ) between the central and peripheral pools has been claimed as an initiating event in Alzheimer's disease (AD). In this study, we employ discoidal high-density lipoproteins (HDL-Disc) mimicking Aβ antibody for directional flux of Aβ from central to peripheral catabolism, with desirable safety and translation potential. Structurally, HDL-Disc assembly (polyDisc) is prepared with aid of chitosan derivative polymerization. After intranasal administration and response to slightly acidic nasal microenvironment, polyDisc depolymerizes into carrier-free HDL-Disc with chitosan derivatives that adhere to the mucosal layer to reversibly open tight junctions, helping HDL-Disc penetrate the olfactory pathway into brain. Thereafter, HDL-Disc captures Aβ into microglia for central clearance or ferries Aβ out of the brain for liver-mediated compensatory catabolism. For synergy therapy, intranasal administration of polyDisc can effectively reduce intracerebral Aβ burden by 97.3% and vascular Aβ burden by 73.5%, ameliorate neurologic damage, and rescue memory deficits in APPswe/PS1dE9 transgenic AD mice with improved safety, especially vascular safety. Collectively, this design provides a proof of concept for developing Aβ antibody mimics to mobilize a synergy of central and peripheral Aβ clearance for AD treatment.
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Affiliation(s)
- Huaqing Zhang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Yun Chen
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Miao Yu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Yilong Xi
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Guochen Han
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Yi Jin
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Gang Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Xinzhu Sun
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Jianping Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
| | - Yang Ding
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing210009, China
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang550014, China
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Sun T, Feng M, Manyande A, Xiang H, Xiong J, He Z. Regulation of mild cognitive impairment associated with liver disease by humoral factors derived from the gastrointestinal tract and MRI research progress: a literature review. Front Neurosci 2023; 17:1206417. [PMID: 37397455 PMCID: PMC10312011 DOI: 10.3389/fnins.2023.1206417] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 05/30/2023] [Indexed: 07/04/2023] Open
Abstract
Patients with liver disease are prone to various cognitive impairments. It is undeniable that cognitive impairment is often regulated by both the nervous system and the immune system. In this review our research focused on the regulation of mild cognitive impairment associated with liver disease by humoral factors derived from the gastrointestinal tract, and revealed that its mechanisms may be involved with hyperammonemia, neuroinflammation, brain energy and neurotransmitter metabolic disorders, and liver-derived factors. In addition, we share the emerging research progress in magnetic resonance imaging techniques of the brain during mild cognitive impairment associated with liver disease, in order to provide ideas for the prevention and treatment of mild cognitive impairment in liver disease.
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Affiliation(s)
- Tianning Sun
- Department of Anesthesiology, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Maohui Feng
- Department of Gastrointestinal Surgery, Wuhan Peritoneal Cancer Clinical Medical Research Center, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Wuhan, Hubei, China
| | - Anne Manyande
- School of Human and Social Sciences, University of West London, London, United Kingdom
| | - Hongbing Xiang
- Department of Anesthesiology, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jun Xiong
- Center for Liver Transplantation, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhigang He
- Department of Anesthesiology, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Qu Y, Qin QX, Wang DL, Li JT, Zhao JW, An K, Li JY, Mao ZJ, Min Z, Xiong YJ, Xue Z. Estimated glomerular filtration rate is a biomarker of cognitive impairment in Parkinson's disease. Front Aging Neurosci 2023; 15:1130833. [PMID: 37284018 PMCID: PMC10240071 DOI: 10.3389/fnagi.2023.1130833] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 04/24/2023] [Indexed: 06/08/2023] Open
Abstract
Backgrounds The relationship between kidney function and cognitive impairment in Parkinson's disease (PD) is poorly understood and underexplored. This study aims to explore whether renal indices can serve as indicators to monitor the cognitive impairment of PD. Methods A total of 508 PD patients and 168 healthy controls from the Parkinson's Progression Markers Initiative (PPMI) were recruited, and 486 (95.7%) PD patients underwent longitudinal measurements. The renal indicators including serum creatinine (Scr), uric acid (UA), and urea nitrogen, as well as UA/Scr ratio and estimated glomerular filtration rate (eGFR), were measured. Cross-sectional and longitudinal associations between kidney function and cognitive impairment were evaluated using multivariable-adjusted models. Results eGFR was associated with lower levels of cerebrospinal fluid (CSF) Aβ1-42 (p = 0.0156) and α-synuclein (p = 0.0151) and higher serum NfL (p = 0.0215) in PD patients at baseline. Longitudinal results showed that decreased eGFR predicted a higher risk of cognitive impairment (HR = 0.7382, 95% CI = 0.6329-0.8610). Additionally, eGFR decline was significantly associated with higher rates of increase in CSF T-tau (p = 0.0096), P-tau (p = 0.0250), and serum NfL (p = 0.0189), as well as global cognition and various cognitive domains (p < 0.0500). The reduced UA/Scr ratio was also linked to higher NfL levels (p = 0.0282) and greater accumulation of T-tau (p = 0.0282) and P-tau (p = 0.0317). However, no significant associations were found between other renal indices and cognition. Conclusion eGFR is altered in PD subjects with cognitive impairment, and predict larger progression of cognitive decline. It may assist identifying patients with PD at risk of rapid cognitive decline and have the potential to monitoring responses to therapy in future clinical practice.
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Yu Y, Zhang N, Xiang B, Ding N, Liu J, Huang J, Zhao M, Zhao Y, Wang Y, Ma Z. In vivo characterization of cerebrovascular impairment induced by amyloid β peptide overload in glymphatic clearance system using swept-source optical coherence tomography. NEUROPHOTONICS 2023; 10:015005. [PMID: 36817752 PMCID: PMC9933996 DOI: 10.1117/1.nph.10.1.015005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
SIGNIFICANCE Antiamyloid β ( A β ) immunotherapy is a promising therapeutic strategy for Alzheimer's disease (AD) but generates large amounts of soluble A β peptides that could overwhelm the clearance pathway, leading to serious side effects. Direct implications of A β in glymphatic drainage transport for cerebral vasculature and tissue are not well known. Studies are needed to resolve this issue and pave the way to better monitoring abnormal vascular events that may occur in A β -modifying therapies for AD. AIM The objective is to characterize the modification of cerebral vasculature and tissue induced by soluble A β abundantly present in the glymphatic clearance system. APPROACH A β 1 - 42 peptide was injected intracerebroventricularly and swept-source optical coherence tomography (SS-OCT) was used to monitor the progression of changes in the brain microvascular network and tissue in vivo over 14 days. Parameters reflecting vascular morphology and structure as well as tissue status were quantified and compared before treatment. RESULTS Vascular perfusion density, vessel length, and branch density decreased sharply and persistently following peptide administration. In comparison, vascular average diameter and vascular tortuosity were moderately increased at the late stage of monitoring. Endpoint density gradually increased, and the global optical attenuation coefficient value decreased significantly over time. CONCLUSIONS A β burden in the glymphatic system directly contributes to cerebrovascular structural and morphological abnormalities and global brain tissue damage, suggesting severe deleterious properties of soluble cerebrospinal fluid- A β . We also show that OCT can be used as an effective tool to monitor cerebrovascular dynamics and tissue property changes in response to therapeutic treatments in drug discovery research.
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Affiliation(s)
- Yao Yu
- Northeastern University at Qinhuangdao, School of Control Engineering, Qinhuangdao, China
- Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, China
| | - Ning Zhang
- Northeastern University at Qinhuangdao, School of Control Engineering, Qinhuangdao, China
| | - Ben Xiang
- Northeastern University, College of Information Science and Engineering, Shenyang, China
| | - Ning Ding
- Northeastern University, College of Information Science and Engineering, Shenyang, China
| | - Jian Liu
- Northeastern University at Qinhuangdao, School of Control Engineering, Qinhuangdao, China
- Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, China
| | - Jiangmei Huang
- First Hospital of Qinhuangdao, Department of Pathology, Qinhuangdao, China
| | - Min Zhao
- First Hospital of Qinhuangdao, Department of Pathology, Qinhuangdao, China
| | - Yuqian Zhao
- Northeastern University at Qinhuangdao, School of Control Engineering, Qinhuangdao, China
| | - Yi Wang
- Northeastern University at Qinhuangdao, School of Control Engineering, Qinhuangdao, China
- Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, China
| | - Zhenhe Ma
- Northeastern University at Qinhuangdao, School of Control Engineering, Qinhuangdao, China
- Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, China
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8
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Huang Z, Lin HW(K, Zhang Q, Zong X. Targeting Alzheimer's Disease: The Critical Crosstalk between the Liver and Brain. Nutrients 2022; 14:nu14204298. [PMID: 36296980 PMCID: PMC9609624 DOI: 10.3390/nu14204298] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 01/24/2023] Open
Abstract
Alzheimer's disease (AD), an age-related neurodegenerative disorder, is currently incurable. Imbalanced amyloid-beta (Aβ) generation and clearance are thought to play a pivotal role in the pathogenesis of AD. Historically, strategies targeting Aβ clearance have typically focused on central clearance, but with limited clinical success. Recently, the contribution of peripheral systems, particularly the liver, to Aβ clearance has sparked an increased interest. In addition, AD presents pathological features similar to those of metabolic syndrome, and the critical involvement of brain energy metabolic disturbances in this disease has been recognized. More importantly, the liver may be a key regulator in these abnormalities, far beyond our past understanding. Here, we review recent animal and clinical findings indicating that liver dysfunction represents an early event in AD pathophysiology. We further propose that compromised peripheral Aβ clearance by the liver and aberrant hepatic physiological processes may contribute to AD neurodegeneration. The role of a hepatic synthesis product, fibroblast growth factor 21 (FGF21), in the management of AD is also discussed. A deeper understanding of the communication between the liver and brain may lead to new opportunities for the early diagnosis and treatment of AD.
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9
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Wang J, Guo C, Meng Z, Zwan MD, Chen X, Seelow S, Lundström SL, Rodin S, Teunissen CE, Zubarev RA. Testing the link between isoaspartate and Alzheimer's disease etiology. Alzheimers Dement 2022; 19:1491-1502. [PMID: 35924765 DOI: 10.1002/alz.12735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 11/09/2022]
Abstract
Isoaspartate (isoAsp) is a damaging amino acid residue formed in proteins as a result of spontaneous deamidation. IsoAsp disrupts protein structures, making them prone to aggregation. Here we strengthened the link between isoAsp and Alzheimer's disease (AD) by novel approaches to isoAsp analysis in human serum albumin (HSA), the most abundant blood protein and a major carrier of amyloid beta (Aβ) and phosphorylated tau (p-tau) in blood. We discovered a reduced amount of anti-isoAsp antibodies (P < 0.0001), an elevated isoAsp level in HSA (P < 0.001), more HSA aggregates (P < 0.0001), and increased levels of free Aβ (P < 0.01) in AD blood compared to controls. We also found that deamidation significantly reduces HSA capacity to bind with Aβ and p-tau (P < 0.05). These suggest the presence in AD of a bottleneck in clearance of Aβ and p-tau, leading to their increased concentrations in the brain and facilitating their aggregations there.
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Affiliation(s)
- Jijing Wang
- Department of Medical Biophysics and Biochemistry, Karolinska Institutet, Stockholm, Sweden
| | - Cong Guo
- Department of Physics and International Centre for Quantum and Molecular Structures, College of Sciences, Shanghai University, Shanghai, China
| | - Zhaowei Meng
- Department of Medical Biophysics and Biochemistry, Karolinska Institutet, Stockholm, Sweden
| | - Marissa D Zwan
- Neurochemistry Laboratory, Department of Clinical Chemistry, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam UMC, Amsterdam, The Netherlands
| | - Xin Chen
- Department of Physics and International Centre for Quantum and Molecular Structures, College of Sciences, Shanghai University, Shanghai, China
| | - Sven Seelow
- Department of Medical Biophysics and Biochemistry, Karolinska Institutet, Stockholm, Sweden
| | - Susanna L Lundström
- Department of Medical Biophysics and Biochemistry, Karolinska Institutet, Stockholm, Sweden
| | - Sergey Rodin
- Department of Medical Biophysics and Biochemistry, Karolinska Institutet, Stockholm, Sweden.,Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Charlotte E Teunissen
- Neurochemistry Laboratory, Department of Clinical Chemistry, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam UMC, Amsterdam, The Netherlands
| | - Roman A Zubarev
- Department of Medical Biophysics and Biochemistry, Karolinska Institutet, Stockholm, Sweden.,Endocrinology Research Centre, Moscow, Russian Federation.,Department of Pharmacological & Technological Chemistry, I.M. Sechenov First Moscow State Medical University, Moscow, Russian Federation
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10
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Krauze M, Ognik K, Mikulski D, Jankowski J. Assessment of Neurodegenerative Changes in Turkeys Fed Diets with Different Proportions of Arginine and Methionine Relative to Lysine. Animals (Basel) 2022; 12:ani12121535. [PMID: 35739872 PMCID: PMC9219421 DOI: 10.3390/ani12121535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 12/02/2022] Open
Abstract
Simple Summary It is important to take care of a properly balanced amino acid composition in the diet in order to inhibit or delay the occurrence of processes and changes related to the destruction of nervous tissue. Therefore, an attempt was made in this manuscript to evaluate the effect of different ratios of the key amino acids arginine and methionine, relative to lysine, in relation to two turkey feeding standards. The amino acid guidelines formulated by British United Turkeys (BUT) suggest higher levels of lysine (Lys) in turkey diets than those recommended by the National Research Council (NRC). In order to assess the impact of such supplementation, we analyzed the level of indicators informing the presence or degree of advancement of neurodegenerative processes in the nervous tissue (the level of acetylcholinesterase and amyloid-β; the concentration of AChE complexes with amyloid-β and Tau protein, called glycosylated acetylcholinesterase (GAChE), indicative of the destruction of neurons). The level of low-density lipoprotein receptor-related protein 1, or LRP-1, which facilitates the breakdown of toxic amyloid-β, was also assessed. In addition, the effect of different doses of these amino acids on neurodegenerative changes in DNA, especially the degree of methylation of histone proteins resulting from covalent modifications was compared between lysine and arginine residues. Abstract We postulated that the use of optimal levels and proportions of Arg and Met relative to a low or high concentration of Lys in diets for meat turkeys would reduce the occurrence of metabolic disturbances in the nervous tissue that can lead to neurodegenerative changes. The aim of the study was to determine the effect of various proportions of Lys, Arg, and Met in diets for turkeys, with a low content of Lys in accordance with NRC (Experiment 1) recommendations, and in diets with high Lys levels that are close to the recommendations of breeding companies (Experiment 2) on selected indicators of potential neurodegenerative effects in the brain and liver of turkeys. The Experiment 1 and Experiment 2 was conducted using 864 day-old turkey chicks randomly assigned to six groups, in eight replicates (6 groups × 18 birds × 8 replicates). A full description of the methodology can be found in previously published papers using the same experimental design. Indicators informing about the presence or advancement of neurodegenerative processes in the nervous tissue were determined in the brain and liver (level of: AChE, amyloid-β, GAChE, Tau protein, LRP1, and the degree of DNA methylation). It was established that in the case of both a low (National Research Council, NRC) and a high (British United Turkeys, BUT) level of Lys in the diet of turkeys, the Arg level can be reduced to 90% of the Lys level and Met to 30% of the Lys level, because this does not cause neurodegenerative changes in turkeys. Unfavorable neurodegenerative changes may appear if the Arg level is increased from 100 to 110% of the Lys level recommended by the NRC. However, due to the lack of such a relationship when Arg is increased from 100 to 110% of the Lys level recommended by BUT, at this stage of research no definitive conclusions can be drawn regarding the risk of neurodegenerative changes caused by increasing Arg in the diet of turkeys.
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Affiliation(s)
- Magdalena Krauze
- Department of Biochemistry and Toxicology, University of Life Sciences, 20-950 Lublin, Poland;
- Correspondence:
| | - Katarzyna Ognik
- Department of Biochemistry and Toxicology, University of Life Sciences, 20-950 Lublin, Poland;
| | - Dariusz Mikulski
- Department of Poultry Science, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland; (D.M.); (J.J.)
| | - Jan Jankowski
- Department of Poultry Science, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland; (D.M.); (J.J.)
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11
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Zheng Y, Ji B, Chen S, Zhou R, Ni R. The impact of uremic toxins on Alzheimer's disease. Curr Alzheimer Res 2022; 19:104-118. [PMID: 35048807 DOI: 10.2174/1567205019666220120113305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/27/2021] [Accepted: 12/14/2021] [Indexed: 11/22/2022]
Abstract
Alzheimer's disease (AD) is the most common type of dementia, pathologically characterized by accumulation of senile plaques and neurofibrillary tangles. Chronic kidney disease (CKD) is highly prevalent in elderly population closely associated with occurrence of dementia. Recent epidemiological and experimental studies suggest a potential association of CKD with AD. Both diseases share a panel of identical risk factors, such as type 2 diabetes; and hypertension. However, the relationship between CKD and AD is unclear. Lower clearance of a panel of uremic toxin including cystatin-C, guanidine, and adiponectin due to CKD is implied to contribute to AD pathogenesis. In this review we summarize the current evidence from epidemiological, experimental and clinical studies on the potential contribution of uremic toxins to AD pathogenesis. We describe outstanding questions and propose an outlook on the link between uremic toxins and AD.
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Affiliation(s)
- Yuqi Zheng
- Department of Nephrology, Yangpu Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Bin Ji
- Department of Radiopharmacy and Molecular Imaging, School of Pharmacy, Fudan University, Shanghai, China
| | - Sijun Chen
- Department of Nephrology, Yangpu Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Rong Zhou
- Department of Nephrology, Yangpu Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Ruiqing Ni
- Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Institute for Biomedical Engineering, University of Zurich & ETH Zurich, Zurich, Switzerland
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Hermans SJ, Nero TL, Morton CJ, Gooi JH, Crespi GAN, Hancock NC, Gao C, Ishii K, Markulić J, Parker MW. Structural biology of cell surface receptors implicated in Alzheimer’s disease. Biophys Rev 2021; 14:233-255. [DOI: 10.1007/s12551-021-00903-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/02/2021] [Indexed: 02/06/2023] Open
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13
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Chen SH, He CY, Shen YY, Zeng GH, Tian DY, Cheng Y, Xu MY, Fan DY, Tan CR, Shi AY, Bu XL, Wang YJ. Polysaccharide Krestin Prevents Alzheimer's Disease-type Pathology and Cognitive Deficits by Enhancing Monocyte Amyloid-β Processing. Neurosci Bull 2021; 38:290-302. [PMID: 34611829 PMCID: PMC8975919 DOI: 10.1007/s12264-021-00779-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 06/18/2021] [Indexed: 10/20/2022] Open
Abstract
Deficits in the clearance of amyloid β protein (Aβ) by the peripheral system play a critical role in the pathogenesis of sporadic Alzheimer's disease (AD). Impaired uptake of Aβ by dysfunctional monocytes is deemed to be one of the major mechanisms underlying deficient peripheral Aβ clearance in AD. In the current study, flow cytometry and biochemical and behavioral techniques were applied to investigate the effects of polysaccharide krestin (PSK) on AD-related pathology in vitro and in vivo. We found that PSK, widely used in therapy for various cancers, has the potential to enhance Aβ uptake and intracellular processing by human monocytes in vitro. After administration of PSK by intraperitoneal injection, APP/PS1 mice performed better in behavioral tests, along with reduced Aβ deposition, neuroinflammation, neuronal loss, and tau hyperphosphorylation. These results suggest that PSK holds promise as a preventive agent for AD by strengthening the Aβ clearance by blood monocytes and alleviating AD-like pathology.
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Affiliation(s)
- Si-Han Chen
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China ,grid.449525.b0000 0004 1798 4472Department of Neurology, Nanchong Central Hospital, The Second Clinical Medical School, North Sichuan Medical College, Nanchong, 637000 China
| | - Chen-Yang He
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Ying-Ying Shen
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Gui-Hua Zeng
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Ding-Yuan Tian
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Yuan Cheng
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Man-Yu Xu
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Dong-Yu Fan
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Cheng-Rong Tan
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - An-Yu Shi
- grid.410570.70000 0004 1760 6682Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042 China ,grid.410570.70000 0004 1760 6682The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042 China ,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042 China
| | - Xian-Le Bu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China. .,The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042, China. .,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China. .,State Key Laboratory of Trauma, Burn and Combined Injury, Daping Hospital, Third Military Medical University, Chongqing, 400042, China.
| | - Yan-Jiang Wang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China. .,The Institute of Brain and Intelligence, Third Military Medical University, Chongqing, 400042, China. .,Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China. .,State Key Laboratory of Trauma, Burn and Combined Injury, Daping Hospital, Third Military Medical University, Chongqing, 400042, China. .,Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 201200, China.
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14
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Ma M, Liu Z, Gao N, Dong K, Pi Z, Kang L, Du X, Ren J, Qu X. Near-infrared target enhanced peripheral clearance of amyloid-β in Alzheimer's disease model. Biomaterials 2021; 276:121065. [PMID: 34391018 DOI: 10.1016/j.biomaterials.2021.121065] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 06/16/2021] [Accepted: 08/07/2021] [Indexed: 12/29/2022]
Abstract
Clearance of peripheral amyloid-β (Aβ) has been demonstrated particularly promising for overcoming the blood-brain barrier (BBB) hurdle to remove brain-derived Aβ associated with Alzheimer's disease (AD). However, currently used therapeutic agents targeting peripheral Aβ cannot simultaneously achieve plasma Aβ enrichment and enhanced clearance, which may result in poor bioavailability and rather low efficacy. Moreover, most of therapeutic agents usually promote the unfavorable aggregation of Aβ. Herein, we construct a near-infrared (NIR) regulated surface-transformable and target peptide-guided upconversion platform (UCNP/ONA-P/K), serving as a safe and effective way for Aβ clearance. Taking advantage of extended blood circulation, high selectivity toward Aβ, and surface-transformable property, such UCNP/ONA-P/K can address the challenges of peripheral Aβ clearance by a combination of enhancing the enrichment of plasma Aβ, preventing the unfavorable aggregation of Aβ and simultaneously facilitating the hepatic clearance of the captured Aβ. After verified by a series of systematic toxicity evaluation, cell uptake, deep tissue penetration, and hemolytic experiments, in vivo studies demonstrate that UCNP/ONA-P/K can efficiently decrease brain Aβ burden and reverse memory deficits in 3xTg-AD mice. Overall, this NIR multi-functional design provides a new biocompatible and efficient way for Aβ removal, which will promote the application of peripheral clearance of Aβ for AD treatment.
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Affiliation(s)
- Mengmeng Ma
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China; University of Science and Technology of China, Hefei, Anhui, 230029, PR China
| | - Zhenqi Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China; University of Science and Technology of China, Hefei, Anhui, 230029, PR China
| | - Nan Gao
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China
| | - Kai Dong
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China
| | - Zifeng Pi
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China
| | - Lihua Kang
- Cancer Center, First Affiliated Hospital, Jilin University, Changchun, Jilin, 130061, PR China.
| | - Xiubo Du
- College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, PR China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, PR China; Cancer Center, First Affiliated Hospital, Jilin University, Changchun, Jilin, 130061, PR China.
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15
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Xu L, Pan CL, Wu XH, Song JJ, Meng P, Li L, Wang L, Zhang Z, Zhang ZY. Inhibition of Smad3 in macrophages promotes Aβ efflux from the brain and thereby ameliorates Alzheimer's pathology. Brain Behav Immun 2021; 95:154-167. [PMID: 33737172 DOI: 10.1016/j.bbi.2021.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 12/11/2022] Open
Abstract
Impaired amyloid-β (Aβ) clearance is believed to be a primary cause of Alzheimer's disease (AD), and peripheral abnormalities in Aβ clearance have recently been linked to AD pathogenesis and progression. Data from recent genome-wide association studies have linked genetic risk factors associated with altered functions of more immune cells to AD pathology. Here, we first identified correlations of Smad3 signaling activation in peripheral macrophages with AD progression and phagocytosis of Aβ. Then, manipulating the Smad3 signaling regulated macrophage phagocytosis of Aβ and induced switch of macrophage inflammatory phenotypes in our cell cultures. In our mouse models, flag-tagged or fluorescent-dye conjugated Aβ was injected into the lateral ventricles or tail veins, and traced. Interestingly, blocking Smad3 signaling efficiently increased Aβ clearance by macrophages, reduced Aβ in the periphery and thereby enhanced Aβ efflux from the brain. Moreover, in our APP/PS1 transgenic AD model mice, Smad3 inhibition significantly attenuated Aβ deposition and neuroinflammation, and ameliorated cognitive deficits, probably by enhancing the peripheral clearance of Aβ. In conclusion, enhancing Aβ clearance by peripheral macrophages through Smad3 inhibition attenuated AD-related pathology and cognitive deficits, which may provide a new perspective for understanding AD and finding novel therapeutic approaches.
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Affiliation(s)
- Lu Xu
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China; The Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China
| | - Cai-Long Pan
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China; The Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China
| | - Xiang-Hui Wu
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Jing-Jing Song
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Ping Meng
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China; Department of Pathology, Zhongda Hospital, Southeast University, Nanjing 210009, China
| | - Lei Li
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Li Wang
- Department of Hygiene Analysis and Detection, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Zhiren Zhang
- Institute of Immunology, Army Medical University, 30 Gaotanyan Main Street, Chongqing 400038, China
| | - Zhi-Yuan Zhang
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China; The Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China; Department of Neurology, Sir Run Run Hospital, Nanjing Medical University, Nanjing 211166, China.
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16
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Mortada I, Farah R, Nabha S, Ojcius DM, Fares Y, Almawi WY, Sadier NS. Immunotherapies for Neurodegenerative Diseases. Front Neurol 2021; 12:654739. [PMID: 34163421 PMCID: PMC8215715 DOI: 10.3389/fneur.2021.654739] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 05/05/2021] [Indexed: 12/12/2022] Open
Abstract
The current treatments for neurodegenerative diseases are mostly symptomatic without affecting the underlying cause of disease. Emerging evidence supports a potential role for immunotherapy in the management of disease progression. Numerous reports raise the exciting prospect that either the immune system or its derivative components could be harnessed to fight the misfolded and aggregated proteins that accumulate in several neurodegenerative diseases. Passive and active vaccinations using monoclonal antibodies and specific antigens that induce adaptive immune responses are currently under evaluation for their potential use in the development of immunotherapies. In this review, we aim to shed light on prominent immunotherapeutic strategies being developed to fight neuroinflammation-induced neurodegeneration, with a focus on innovative immunotherapies such as vaccination therapy.
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Affiliation(s)
- Ibrahim Mortada
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon
| | - Raymond Farah
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon
| | - Sanaa Nabha
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon
| | - David M Ojcius
- Department of Biomedical Sciences, University of the Pacific, Arthur Dugoni School of Dentistry, San Francisco, CA, United States
| | - Youssef Fares
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon
| | - Wassim Y Almawi
- College of Health Sciences, Abu Dhabi University, Abu Dhabi, United Arab Emirates
| | - Najwane Said Sadier
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon.,College of Health Sciences, Abu Dhabi University, Abu Dhabi, United Arab Emirates
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17
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Albus A, Kronimus Y, Neumann S, Vidovic N, Frenzel A, Kuhn P, Seifert M, Ziehm T, van der Wurp H, Dodel R. Effects of a Multimerized Recombinant Autoantibody Against Amyloid-β. Neuroscience 2021; 463:355-369. [PMID: 33958140 DOI: 10.1016/j.neuroscience.2021.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 02/08/2023]
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease; thus, the search for a cure or causal therapy has become necessary. Despite intense research on this topic in recent decades, there is no curative therapy up today, and also no disease-modifying treatment has been approved. As promising approach passive immunization strategies have thereby come forth. In this study, we focused on naturally occurring autoantibodies against the AD-associated peptide amyloid-β. These antibodies have already reported to show beneficial functions in vitro and in mouse models of AD. However, their availability is limited due to their low abundance in peripheral blood. In a recent study, we were able to generate four recombinant antibodies against amyloid-β. In the present study, we tested these antibodies in ELISA and SPR assays for their binding behavior and by aggregation- and phagocytosis assays as functional evidences to characterize their amyloid-β-related neutralizing and clearance abilities. Further ex vivo assay on organotypic hippocampal slice cultures gave first evidence of microglial activation and inflammatory features. The tested recombinant antibodies in IgG format showed, in comparison to naturally occurring autoantibodies against amyloid-β, insufficient binding capacities and -affinities. However, after conversion of one antibody into a single chain format multimerization of the scFv-Fc construct, the investigated binding capacity and -affinity showed improvements. Further functional assays predict a protective effect of this antibody. Although, all four recombinant antibodies showed binding to amyloid-β, promising features were only detectable after conversion into a multimeric format. The multimeric scFv-Fc antibody exhibited thereby strong impact on amyloid-β clearance and inhibition of oligomerization.
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Affiliation(s)
- Alexandra Albus
- Chair of Geriatric Medicine, University Duisburg-Essen, Germany; Department of Neurology, Philipps-University, Marburg, Germany
| | - Yannick Kronimus
- Chair of Geriatric Medicine, University Duisburg-Essen, Germany; Department of Neurology, Philipps-University, Marburg, Germany
| | - Sascha Neumann
- Chair of Geriatric Medicine, University Duisburg-Essen, Germany
| | - Natascha Vidovic
- Chair of Geriatric Medicine, University Duisburg-Essen, Germany; Department of Neurology, Philipps-University, Marburg, Germany
| | | | | | - Marc Seifert
- Institute of Cell Biology (Cancer Research), Medical Faculty, University Duisburg-Essen, Germany
| | - Tamar Ziehm
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, Jülich, Germany
| | - Hendrik van der Wurp
- Chair of Geriatric Medicine, University Duisburg-Essen, Germany; Faculty of Statistics, TU Dortmund University, Dortmund, Germany
| | - Richard Dodel
- Chair of Geriatric Medicine, University Duisburg-Essen, Germany; Department of Neurology, Philipps-University, Marburg, Germany.
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18
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Kelliny S, Bobrovskaya L, Zhou XF, Upton R. Pharmacokinetic Modelling of Human Recombinant Protein, p75ECD-Fc: A Novel Therapeutic Approach for Treatment of Alzheimer's Disease, in Serum and Tissue of Sprague Dawley Rats. Eur J Drug Metab Pharmacokinet 2021; 46:235-248. [PMID: 33507523 DOI: 10.1007/s13318-020-00662-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE p75ECD-Fc is a novel antagonist of toxic amyloid beta protein and other neurodegenerative factors with potential for the treatment of Alzheimer's disease (AD). Preclinical studies showed that it can alleviate the AD pathologies in animal models of dementia. In a previous paper, we used non-compartmental pharmacokinetic analysis to obtain preliminary pharmacokinetic data for p75ECD-Fc in Sprague Dawley (SD) rats. We also studied the tissue distribution in terms of drug metabolism that helped us to understand possible mechanisms of action. Here, we aim to develop population pharmacokinetic models that can describe the pharmacokinetics of p75ECD-Fc in serum and tissues. METHODS p75ECD-Fc was delivered to SD rats via two routes (intravenous and subcutaneous) at a single dose of 3 mg/kg (n = 15). Blood (n = 12) and tissue samples (n = 10-15) were then separated at different time points for a total duration of 42 days post dosage. The concentration of p75ECD-Fc in serum and tissues was measured using an enzyme-linked immunosorbent assay. RESULTS Data were best fitted to a 2-compartment model with linear elimination kinetics. The population parameter estimates for clearance, and volume of central and peripheral compartments were 0.000176 L/h, 0.0145 L and 0.0263 L, respectively. The presence of anti-drug antibodies was added to the final model as a covariate on clearance. The subcutaneous bioavailability was estimated to be 53.5% with a first-order absorption rate constant of 0.00745 1/h. By modeling of individual tissue concentrations, p75ECD-Fc was found to exhibit modest tissue distribution with estimated tissue/plasma partition coefficients (R) ranging from 0.004 to 0.2. CONCLUSION This is the first report of a pharmacokinetic model for p75ECD-Fc and these results may facilitate the ongoing development of p75ECD-Fc and translation to clinical studies.
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Affiliation(s)
- Sally Kelliny
- University of South Australia, Clinical and Health Sciences, Adelaide, SA, 5000, Australia.,Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Larisa Bobrovskaya
- University of South Australia, Clinical and Health Sciences, Adelaide, SA, 5000, Australia
| | - Xin-Fu Zhou
- University of South Australia, Clinical and Health Sciences, Adelaide, SA, 5000, Australia.
| | - Richard Upton
- University of South Australia, Clinical and Health Sciences, Australian Centre for Pharmacometrics, Adelaide, SA, 5000, Australia.
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19
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Su Q, Li T, He PF, Lu XC, Yu Q, Gao QC, Wang ZJ, Wu MN, Yang D, Qi JS. Trichostatin A ameliorates Alzheimer's disease-related pathology and cognitive deficits by increasing albumin expression and Aβ clearance in APP/PS1 mice. Alzheimers Res Ther 2021; 13:7. [PMID: 33397436 PMCID: PMC7784383 DOI: 10.1186/s13195-020-00746-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 12/08/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is an intractable neurodegenerative disorder in the elderly population, currently lacking a cure. Trichostatin A (TSA), a histone deacetylase inhibitor, showed some neuroprotective roles, but its pathology-improvement effects in AD are still uncertain, and the underlying mechanisms remain to be elucidated. The present study aims to examine the anti-AD effects of TSA, particularly investigating its underlying cellular and molecular mechanisms. METHODS Novel object recognition and Morris water maze tests were used to evaluate the memory-ameliorating effects of TSA in APP/PS1 transgenic mice. Immunofluorescence, Western blotting, Simoa assay, and transmission electron microscopy were utilized to examine the pathology-improvement effects of TSA. Microglial activity was assessed by Western blotting and transwell migration assay. Protein-protein interactions were analyzed by co-immunoprecipitation and LC-MS/MS. RESULTS TSA treatment not only reduced amyloid β (Aβ) plaques and soluble Aβ oligomers in the brain, but also effectively improved learning and memory behaviors of APP/PS1 mice. In vitro study suggested that the improvement of Aβ pathology by TSA was attributed to the enhancement of Aβ clearance, mainly by the phagocytosis of microglia, and the endocytosis and transport of microvascular endothelial cells. Notably, a meaningful discovery in the study was that TSA dramatically upregulated the expression level of albumin in cell culture, by which TSA inhibited Aβ aggregation and promoted the phagocytosis of Aβ oligomers. CONCLUSIONS These findings provide a new insight into the pathogenesis of AD and suggest TSA as a novel promising candidate for the AD treatment.
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Affiliation(s)
- Qiang Su
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Tian Li
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Pei-Feng He
- Institute of Medical Data Sciences and School of Management, Shanxi Medical University, Taiyuan, 030001, Shanxi, China.
| | - Xue-Chun Lu
- Department of Hematology, the Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China.
| | - Qi Yu
- Institute of Medical Data Sciences and School of Management, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Qi-Chao Gao
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Zhao-Jun Wang
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Mei-Na Wu
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Dan Yang
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Jin-Shun Qi
- Department of Physiology, Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, Shanxi, China.
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20
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Ma M, Liu Z, Gao N, Pi Z, Du X, Ren J, Qu X. Self-Protecting Biomimetic Nanozyme for Selective and Synergistic Clearance of Peripheral Amyloid-β in an Alzheimer’s Disease Model. J Am Chem Soc 2020; 142:21702-21711. [DOI: 10.1021/jacs.0c08395] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Mengmeng Ma
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Science and Technology of China, Anhui 230026, China
| | - Zhenqi Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Science and Technology of China, Anhui 230026, China
| | - Nan Gao
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Zifeng Pi
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Xiubo Du
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Science and Technology of China, Anhui 230026, China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
- University of Science and Technology of China, Anhui 230026, China
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21
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Yang Z, Lin P, Chen B, Zhang X, Xiao W, Wu S, Huang C, Feng D, Zhang W, Zhang J. Autophagy alleviates hypoxia-induced blood-brain barrier injury via regulation of CLDN5 (claudin 5). Autophagy 2020; 17:3048-3067. [PMID: 33280500 DOI: 10.1080/15548627.2020.1851897] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Blood-brain barrier (BBB) disruption is a key event in triggering secondary damage to the central nervous system (CNS) under stroke, and is frequently associated with abnormal macroautophagy/autophagy in brain microvascular endothelial cells (BMECs). However, the underlying mechanism of autophagy in maintaining BBB integrity remains unclear. Here we report that in BMECs of patients suffering stroke, CLDN5 (claudin 5) abnormally aggregates in the cytosol accompanied by autophagy activation. In vivo zebrafish and in vitro cell studies reveal that BBB breakdown is partially caused by CAV1 (caveolin 1)-mediated redistribution of membranous CLDN5 into the cytosol under hypoxia. Meanwhile, autophagy is activated and contributes mainly to the degradation of CAV1 and aggregated CLDN5 in the cytosol of BMECs, therefore alleviating BBB breakdown. Blockage of autophagy by genetic methods or chemicals aggravates cytosolic aggregation of CLDN5, resulting in severer BBB impairment. These data demonstrate that autophagy functions in the protection of BBB integrity by regulating CLDN5 redistribution and provide a potential therapeutic strategy for BBB disorder-related cerebrovascular disease.Abbreviations: BBB: blood-brain barrier; BECN1: beclin 1; BMEC: brain microvascular endothelial cell; CAV1: caveolin 1; CCA: common carotid artery; CLDN5: claudin 5; CNS: central nervous system; CQ: chloroquine; HIF1A: hypoxia inducible factor 1 subunit alpha; MCAO: middle cerebral artery occlusion-reperfusion; OCLN: occludin; ROS: reactive oxygen species; STED: stimulated emission depletion; TEER: trans-endothelial electrical resistance; TEM: transmission electron microscopy; TJ: tight junction; TJP1: tight junction protein 1; UPS: ubiquitin-proteasome system.
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Affiliation(s)
- Zhenguo Yang
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
| | - Panpan Lin
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
| | - Bing Chen
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
| | - Xiaoqi Zhang
- Nanshan School, Guangzhou Medical University, Guangzhou, China
| | - Wei Xiao
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
| | - Shuilong Wu
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
| | - Chunnian Huang
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
| | - Du Feng
- School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Wenqing Zhang
- Laboratory of Developmental Biology and Regenerative Medicine, School of Medicine, South China University of Technology, Guangzhou, China
| | - Jingjing Zhang
- Affiliated Hospital of Guangdong Medical University & Key Laboratory of Zebrafish Model for Development and Disease of Guangdong Medical University, Zhanjiang, China
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22
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Rabanel JM, Delbreil P, Banquy X, Brambilla D, Ramassamy C. Periphery-confined particulate systems for the management of neurodegenerative diseases and toxicity: Avoiding the blood-brain-barrier challenge. J Control Release 2020; 322:286-299. [PMID: 32243978 DOI: 10.1016/j.jconrel.2020.03.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 01/07/2023]
Abstract
The blood-brain barrier prevents passage of large and hydrophilic molecules, undermining efforts to deliver most active molecules, proteins and other macromolecules. To date, nanoparticle-assisted delivery has been extensively studied to overcome this challenge but with limited success. On the other hand, for certain brain therapeutic applications, periphery-confined particles could be of immediate therapeutic usefulness. The modulation of CNS dysfunctions from the peripheral compartment is a promising approach, as it does not involve invasive interventions. From recent studies, three main roles could be identified for periphery-confined particles: brain tissue detoxification via the "sink-effect"; a "circulating drug-reservoir" effect to improve drug delivery to brain tissues, and finally, brain vascular endothelium targeting to diagnose or heal vascular-related dysfunctions. These applications are much easier to implement as they do not involve complex therapeutic and targeting strategies and do not require crossing biological barriers. Micro/nano-devices required for such applications will likely be simpler to synthesize and will involve fewer complex materials. Moreover, peripheral particles are expected to be less prone to neurotoxicity and issues related to their diffusion in confined space.
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Affiliation(s)
- Jean-Michel Rabanel
- INRS, Centre Armand-Frappier Santé Biotechnologie, 531 boul. des Prairies, Laval, QC H7V 1B7, Canada
| | - Philippe Delbreil
- Faculty of Pharmacy, Université de Montréal, CP. 6128, succursale Centre-ville, Montréal, QC H3C 3J7, Canada
| | - Xavier Banquy
- Faculty of Pharmacy, Université de Montréal, CP. 6128, succursale Centre-ville, Montréal, QC H3C 3J7, Canada
| | - Davide Brambilla
- Faculty of Pharmacy, Université de Montréal, CP. 6128, succursale Centre-ville, Montréal, QC H3C 3J7, Canada
| | - Charles Ramassamy
- INRS, Centre Armand-Frappier Santé Biotechnologie, 531 boul. des Prairies, Laval, QC H7V 1B7, Canada
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23
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Uddin MS, Kabir MT, Tewari D, Mamun AA, Mathew B, Aleya L, Barreto GE, Bin-Jumah MN, Abdel-Daim MM, Ashraf GM. Revisiting the role of brain and peripheral Aβ in the pathogenesis of Alzheimer's disease. J Neurol Sci 2020; 416:116974. [PMID: 32559516 DOI: 10.1016/j.jns.2020.116974] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 05/15/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022]
Abstract
Amyloid beta (Aβ) is an intricate molecule that interacts with several biomolecules and/or produces insoluble assemblies and eventually the nonphysiological depositions of its alternate with normal neuronal conditions leading to Alzheimer's disease (AD). Aβ is formed through the proteolytic cleavage of the amyloid precursor protein (APP). Significant efforts are being made to explore the exact role of Aβ in AD pathogenesis. It is believed that the deposition of Aβ in the brain takes place from Aβ components which are derived from the brain itself. However, recent evidence suggests that Aβ derived also from the periphery and hence the Aβ circulating in the blood is capable of penetrating the blood-brain barrier (BBB) and the role of Aβ derived from the periphery is largely unknown so far. Therefore, Aβ origin determination and the underlying mechanisms of its pathological effects are of considerable interest in exploring effective therapeutic strategies. The purpose of this review is to provide a novel insight into AD pathogenesis based on Aβ in both the brain and periphery and highlight new therapeutic avenues to combat AD pathogenesis.
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Affiliation(s)
- Md Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh; Pharmakon Neuroscience Research Network, Dhaka, Bangladesh.
| | | | - Devesh Tewari
- Department of Pharmacognosy, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
| | - Abdullah Al Mamun
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh; Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | - Bijo Mathew
- Department of Pharmaceutical Chemistry, Ahalia School of Pharmacy, Palakkad, India
| | - Lotfi Aleya
- Chrono-Environnement Laboratory, CNRS 6249, Bourgogne Franche-Comté University, Besançon, France
| | - George E Barreto
- Department of Biological Sciences, University of Limerick, Limerick, Ireland; Health Research Institute, University of Limerick, Limerick, Ireland
| | - May N Bin-Jumah
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11474, Saudi Arabia
| | - Mohamed M Abdel-Daim
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.
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24
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Peripheral clearance of brain-derived Aβ in Alzheimer's disease: pathophysiology and therapeutic perspectives. Transl Neurodegener 2020; 9:16. [PMID: 32381118 PMCID: PMC7204069 DOI: 10.1186/s40035-020-00195-1] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 04/23/2020] [Indexed: 12/18/2022] Open
Abstract
Alzheimer’s disease (AD) is the most common type of dementia, and no disease-modifying treatments are available to halt or slow its progression. Amyloid-beta (Aβ) is suggested to play a pivotal role in the pathogenesis of AD, and clearance of Aβ from the brain becomes a main therapeutic strategy for AD. Recent studies found that Aβ clearance in the periphery contributes substantially to reducing Aβ accumulation in the brain. Therefore, understanding the mechanism of how Aβ is cleared in the periphery is important for the development of effective therapies for AD. In this review, we summarized recent findings on the mechanisms of Aβ efflux from the brain to the periphery and discuss where and how the brain-derived Aβ is cleared in the periphery. Based on these findings, we propose future strategies to enhance peripheral Aβ clearance for the prevention and treatment of AD. This review provides a novel perspective to understand the pathogenesis of AD and develop interventions for this disease from a systemic approach.
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25
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Abstract
Vaccines have had a profound impact on the management and prevention of infectious disease. In addition, the development of vaccines against chronic diseases has attracted considerable interest as an approach to prevent, rather than treat, conditions such as cancer, Alzheimer's disease, and others. Subunit vaccines consist of nongenetic components of the infectious agent or disease-related epitope. In this Review, we discuss peptide-based vaccines and their potential in three therapeutic areas: infectious disease, Alzheimer's disease, and cancer. We discuss factors that contribute to vaccine efficacy and how these parameters may potentially be modulated by design. We examine both clinically tested vaccines as well as nascent approaches and explore current challenges and potential remedies. While peptide vaccines hold substantial promise in the prevention of human disease, many obstacles remain that have hampered their clinical use; thus, continued research efforts to address these challenges are warranted.
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Affiliation(s)
- Ryan J. Malonis
- Department of Biochemistry, Albert Einstein College of Medicine, Michael F. Price Center for Translational Research, 1301 Morris Park Avenue, Bronx, NY 10461
| | - Jonathan R. Lai
- Department of Biochemistry, Albert Einstein College of Medicine, Michael F. Price Center for Translational Research, 1301 Morris Park Avenue, Bronx, NY 10461
| | - Olivia Vergnolle
- Department of Biochemistry, Albert Einstein College of Medicine, Michael F. Price Center for Translational Research, 1301 Morris Park Avenue, Bronx, NY 10461
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26
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Zhang H, Yu Y, Shen X, Hu X. A Cu2O/Cu/carbon cloth as a binder-free electrode for non-enzymatic glucose sensors with high performance. NEW J CHEM 2020. [DOI: 10.1039/c9nj05256a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An electrode prepared via potentiostatic electrochemical deposition exhibits a 60 nM detection limit and a 1 linear range of 1 to 1555 μM.
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Affiliation(s)
- Haoze Zhang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Yawei Yu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Xiaodong Shen
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Xiulan Hu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
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27
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Smith ES, Porterfield JE, Kannan RM. Leveraging the interplay of nanotechnology and neuroscience: Designing new avenues for treating central nervous system disorders. Adv Drug Deliv Rev 2019; 148:181-203. [PMID: 30844410 PMCID: PMC7043366 DOI: 10.1016/j.addr.2019.02.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/21/2019] [Accepted: 02/28/2019] [Indexed: 12/12/2022]
Abstract
Nanotechnology has the potential to open many novel diagnostic and treatment avenues for disorders of the central nervous system (CNS). In this review, we discuss recent developments in the applications of nanotechnology in CNS therapies, diagnosis and biology. Novel approaches for the diagnosis and treatment of neuroinflammation, brain dysfunction, psychiatric conditions, brain cancer, and nerve injury provide insights into the potential of nanomedicine. We also highlight nanotechnology-enabled neuroscience techniques such as electrophysiology and intracellular sampling to improve our understanding of the brain and its components. With nanotechnology integrally involved in the advancement of basic neuroscience and the development of novel treatments, combined diagnostic and therapeutic applications have begun to emerge. Nanotheranostics for the brain, able to achieve single-cell resolution, will hasten the rate in which we can diagnose, monitor, and treat diseases. Taken together, the recent advances highlighted in this review demonstrate the prospect for significant improvements to clinical diagnosis and treatment of a vast array of neurological diseases. However, it is apparent that a strong dialogue between the nanoscience and neuroscience communities will be critical for the development of successful nanotherapeutics that move to the clinic, benefit patients, and address unmet needs in CNS disorders.
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Affiliation(s)
- Elizabeth S Smith
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA; Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Joshua E Porterfield
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Rangaramanujam M Kannan
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Hugo W. Moser Research Institute at Kennedy Krieger, Inc., Baltimore, MD 21205, USA; Kennedy Krieger Institute, Johns Hopkins University for Cerebral Palsy Research Excellence, Baltimore, MD 21218, USA.
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28
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Wang J, Gu BJ, Masters CL, Wang YJ. A systemic view of Alzheimer disease - insights from amyloid-β metabolism beyond the brain. Nat Rev Neurol 2019; 13:612-623. [PMID: 28960209 DOI: 10.1038/nrneurol.2017.111] [Citation(s) in RCA: 484] [Impact Index Per Article: 96.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Alzheimer disease (AD) is the most common type of dementia, and is currently incurable; existing treatments for AD produce only a modest amelioration of symptoms. Research into this disease has conventionally focused on the CNS. However, several peripheral and systemic abnormalities are now understood to be linked to AD, and our understanding of how these alterations contribute to AD is becoming more clearly defined. This Review focuses on amyloid-β (Aβ), a major hallmark of AD. We review emerging findings of associations between systemic abnormalities and Aβ metabolism, and describe how these associations might interact with or reflect on the central pathways of Aβ production and clearance. On the basis of these findings, we propose that these abnormal systemic changes might not only develop secondary to brain dysfunction but might also affect AD progression, suggesting that the interactions between the brain and the periphery have a crucial role in the development and progression of AD. Such a systemic view of the molecular pathogenesis of AD could provide a novel perspective for understanding this disease and present new opportunities for its early diagnosis and treatment.
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Affiliation(s)
- Jun Wang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, 10 Changjiang branch road, Daping, Chongqing, 400042, China
| | - Ben J Gu
- The Florey Institute, The University of Melbourne, 30 Royal Parade, Parkville, Victoria 3052, Australia
| | - Colin L Masters
- The Florey Institute, The University of Melbourne, 30 Royal Parade, Parkville, Victoria 3052, Australia
| | - Yan-Jiang Wang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, 10 Changjiang branch road, Daping, Chongqing, 400042, China
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29
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Estrada LD, Ahumada P, Cabrera D, Arab JP. Liver Dysfunction as a Novel Player in Alzheimer's Progression: Looking Outside the Brain. Front Aging Neurosci 2019; 11:174. [PMID: 31379558 PMCID: PMC6650779 DOI: 10.3389/fnagi.2019.00174] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 06/25/2019] [Indexed: 12/03/2022] Open
Abstract
Alzheimer's disease (AD) afflicts an estimated 20 million people worldwide and is the fourth-leading cause of death in the developed world. The most common cause of dementia in older individuals, AD is characterized by neuropathologies including synaptic and neuronal degeneration, amyloid plaques, and neurofibrillary tangles (NTFs). Amyloid plaques are primarily composed of amyloid-beta peptide (Aβ), which accumulates in the brains of patients with AD. Further, small aggregates termed Aβ oligomers are implicated in the synaptic loss and neuronal degeneration underlying early cognitive impairments. Whether Aβ accumulates in part because of dysregulated clearance from the brain remains unclear. The flow of substances (e.g., nutrients, drugs, toxins) in and out of the brain is mediated by the blood-brain-barrier (BBB). The BBB exhibits impairment in AD patients and animal models. The effect of BBB impairment on Aβ, and whether BBB function is affected by non-neurological pathologies that impair peripheral clearance requires further investigation. In particular, impaired peripheral clearance is a feature of nonalcoholic fatty liver disease (NAFLD), a spectrum of liver disorders characterized by accumulation of fat in the liver accompanied by varying degrees of inflammation and hepatocyte injury. NAFLD has reached epidemic proportions, with an estimated prevalence between 20% and 30% of the general population. This chronic condition may influence AD pathogenesis. This review article summarizes the current state of the literature linking NAFLD and AD, highlighting the role of the major Aβ efflux and clearance protein, the LRP-1 receptor, which is abundantly expressed in liver, brain, and vasculature.
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Affiliation(s)
- Lisbell D. Estrada
- Bionanotechnology Laboratory, Integrative Center for Applied Biology and Chemistry (CIBQA), Department of Chemical & Biological Sciences, Universidad Bernardo O’Higgins, Santiago, Chile
| | - Pablo Ahumada
- Bionanotechnology Laboratory, Integrative Center for Applied Biology and Chemistry (CIBQA), Department of Chemical & Biological Sciences, Universidad Bernardo O’Higgins, Santiago, Chile
| | - Daniel Cabrera
- Bionanotechnology Laboratory, Integrative Center for Applied Biology and Chemistry (CIBQA), Department of Chemical & Biological Sciences, Universidad Bernardo O’Higgins, Santiago, Chile
- Laboratório de Hepatologia Experimental, Gastroenterology Department, Facultad de Medicina, Centro de Envejecimiento y Regeneración (CARE Chile-UC), P. Universidad Catolica de Chile, Santiago, Chile
| | - Juan P. Arab
- Laboratório de Hepatologia Experimental, Gastroenterology Department, Facultad de Medicina, Centro de Envejecimiento y Regeneración (CARE Chile-UC), P. Universidad Catolica de Chile, Santiago, Chile
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30
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Abstract
Age is the primary risk factor for the vast majority of disorders, including neurodegenerative diseases impacting brain function. Whether the consequences of aging at the biological level can be reversed, or age-related changes prevented, to change the trajectory of such disorders is thus of extreme interest and value. Studies using young plasma, the acellular component of blood, have demonstrated that aging is malleable, with the ability to restore functions in old animals. Fascinatingly, this functional improvement is even observed in the brain, despite the blood-brain barrier, indicating that peripheral sources can effectively impact central sites leading to clinically relevant changes such as enhancement of cognitive function. A plasma-based approach is also attractive as aging is inherently complex, with an array of mechanisms dysregulated in diverse cells and organs throughout the body leading to disturbed function. Plasma, containing a natural mixture of components, has the ability to act multimodally, modulating diverse mechanisms that can converge to change the trajectory of age-related diseases. Here we review the evidence that plasma modulates aging processes in the brain and consider the therapeutic applications that derive from these observations. Plasma and plasma-derived therapeutics are an attractive translation of this concept, requiring critical consideration of benefits, risks, and ethics. Ultimately, knowledge derived from this science will drive a comprehensive molecular understanding to deliver optimized therapeutics. The potential of highly differentiated, multimodal therapeutics for treatment of age-related brain disorders provides an exciting new clinical approach to address the complex etiology of aging.
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Affiliation(s)
- Viktoria Kheifets
- Alkahest Inc., 125 Shoreway Road, Suite D, San Carlos, CA, 94070, USA
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31
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Govindpani K, McNamara LG, Smith NR, Vinnakota C, Waldvogel HJ, Faull RL, Kwakowsky A. Vascular Dysfunction in Alzheimer's Disease: A Prelude to the Pathological Process or a Consequence of It? J Clin Med 2019; 8:E651. [PMID: 31083442 PMCID: PMC6571853 DOI: 10.3390/jcm8050651] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 04/29/2019] [Accepted: 05/06/2019] [Indexed: 12/19/2022] Open
Abstract
Alzheimer's disease (AD) is the most prevalent form of dementia. Despite decades of research following several theoretical and clinical lines, all existing treatments for the disorder are purely symptomatic. AD research has traditionally been focused on neuronal and glial dysfunction. Although there is a wealth of evidence pointing to a significant vascular component in the disease, this angle has been relatively poorly explored. In this review, we consider the various aspects of vascular dysfunction in AD, which has a significant impact on brain metabolism and homeostasis and the clearance of β-amyloid and other toxic metabolites. This may potentially precede the onset of the hallmark pathophysiological and cognitive symptoms of the disease. Pathological changes in vessel haemodynamics, angiogenesis, vascular cell function, vascular coverage, blood-brain barrier permeability and immune cell migration may be related to amyloid toxicity, oxidative stress and apolipoprotein E (APOE) genotype. These vascular deficits may in turn contribute to parenchymal amyloid deposition, neurotoxicity, glial activation and metabolic dysfunction in multiple cell types. A vicious feedback cycle ensues, with progressively worsening neuronal and vascular pathology through the course of the disease. Thus, a better appreciation for the importance of vascular dysfunction in AD may open new avenues for research and therapy.
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Affiliation(s)
- Karan Govindpani
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Laura G McNamara
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Nicholas R Smith
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Chitra Vinnakota
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Henry J Waldvogel
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Richard Lm Faull
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
| | - Andrea Kwakowsky
- Centre for Brain Research, Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
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32
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Wan JJ, Wang PY, Zhang Y, Qin Z, Sun Y, Hu BH, Su DF, Xu DP, Liu X. Role of acute-phase protein ORM in a mice model of ischemic stroke. J Cell Physiol 2019; 234:20533-20545. [PMID: 31026065 DOI: 10.1002/jcp.28653] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 02/22/2019] [Accepted: 03/06/2019] [Indexed: 12/12/2022]
Abstract
The only Food and Drug Administration-approved treatment for acute ischemic stroke is tissue plasminogen activator, and the discovery of novel therapeutic targets is critical. Here, we found orosomucoid (ORM), an acute-phase protein mainly produced by the liver, might act as a treatment candidate for an ischemic stroke. The results showed that ORM2 is the dominant subtype in mice normal brain tissue. After middle cerebral artery occlusion (MCAO), the level of ORM2 is significantly increased in the ischemic penumbra compared with the contralateral normal brain tissue, whereas ORM1 knockout did not affect the infarct size. Exogenous ORM could significantly decrease infarct size and neurological deficit score. Inspiringly, the best administration time point was at 4.5 and 6 hr after MCAO. ORM could markedly decrease the Evans blue extravasation, and improve blood-brain barrier-associated proteins expression in the ischemic penumbra of MACO mice and oxygen-glucose deprivation (OGD)-treated bEnd3 cells. Meanwhile, ORM could significantly alleviate inflammation by inhibiting the production of interleukin 1β (IL-1β), IL-6, and tumor necrosis factor α (TNF-α), reduce oxidative stress by improving the balance of malondialdehyde (MDA) and superoxide dismutase (SOD), inhibit apoptosis by decreasing caspase-3 activity in ischemic penumbra of MCAO mice and OGD-treated bEnd.3 cells. Because of its protective role at multiple levels, ORM might be a promising therapeutic target for ischemic stroke.
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Affiliation(s)
- Jing-Jing Wan
- Department of Clinical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China.,Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Peng-Yuan Wang
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Yu Zhang
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Zhen Qin
- Department of Clinical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China.,Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Yang Sun
- Department of Clinical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China.,Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Bo-Han Hu
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Ding-Feng Su
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Dong-Ping Xu
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Xia Liu
- Department of Clinical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China.,Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
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33
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Alexopoulos P, Thierjung N, Economou P, Werle L, Buhl F, Kagerbauer S, Papanastasiou AD, Grimmer T, Gourzis P, Berthele A, Hemmer B, Kübler H, Martin J, Politis A, Perneczky R. Plasma Levels of Soluble AβPPβ as a Biomarker for Alzheimer's Disease with Dementia. J Alzheimers Dis 2019; 69:83-90. [PMID: 30909232 DOI: 10.3233/jad-181088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cost- and time-effective markers of Alzheimer's disease (AD), reliable and feasible at the population level are urgently needed. Soluble amyloid-β protein precursor β (sAβPPβ) in plasma has attracted scientific attention as a potential AD biomarker candidate. Here we report that plasma sAβPPβ levels in patients with AD dementia and typical for AD cerebrospinal fluid (CSF) biomarker profiles (N = 33) are significantly lower (p < 0.01) than those of cognitively healthy elderly individuals without AD (N = 39), while CSF sAβPPβ levels did not differ between the studied groups. This provides further evidence for the potential of sAβPPβ in plasma as an AD biomarker candidate.
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Affiliation(s)
- Panagiotis Alexopoulos
- Department of Psychiatry and Psychotherapy, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Department of Psychiatry, University Hospital of Rion, University of Patras, Patras, Greece
| | - Nathalie Thierjung
- Department of Psychiatry and Psychotherapy, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Polychronis Economou
- Department of Civil Engineering (Statistics), University of Patras, Patras, Greece
| | - Lukas Werle
- Department of Psychiatry and Psychotherapy, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Max Planck Institute of Psychiatry, Munich, Germany
| | - Felix Buhl
- Department of Psychiatry and Psychotherapy, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Simone Kagerbauer
- Department of Anaesthesiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Anastasios D Papanastasiou
- Molecular Oncology Laboratory, Division of Oncology, University Hospital of Patras, University of Patras, Patras, Greece
| | - Timo Grimmer
- Department of Psychiatry and Psychotherapy, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Philippos Gourzis
- Department of Psychiatry, University Hospital of Rion, University of Patras, Patras, Greece
| | - Achim Berthele
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Bernhard Hemmer
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Hubert Kübler
- Department of Urology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Jan Martin
- Department of Anaesthesiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Antonios Politis
- First Department of Psychiatry, Eginition Hospital, National and Kapodistrian University of Athens, Athens, Greece.,Department of Psychiatry, Division of Geriatric Psychiatry and Neuropsychiatry, Johns Hopkins Medical School, Baltimore, USA
| | - Robert Perneczky
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.,Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-Universität München, Munich, Germany.,Ageing Epidemiology (AGE) Research Unit, School of Public Health, Faculty of Medicine, The Imperial College of Science, Technology and Medicine, London, UK.,German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
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34
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Zhang DF, Xu M, Bi R, Yao YG. Genetic Analyses of Alzheimer's Disease in China: Achievements and Perspectives. ACS Chem Neurosci 2019; 10:890-901. [PMID: 30698408 DOI: 10.1021/acschemneuro.8b00435] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Since 2010, the Chinese have become one of the most aged populations in the world, leading to a severe burden of neurodegenerative disorders. Alzheimer's disease (AD) is the most prevalent neurodegenerative disease and has a high genetic heritability. In the past two decades, numerous genetic analyses, from linkage analyses and candidate gene studies to genome-wide association studies (GWASs) and next-generation sequencing studies, have identified dozens of AD susceptibility or causal genes. These studies have provided a comprehensive genetic view and contributed to the understanding of the pathological and molecular mechanisms of the disease. However, most of the recognized AD genetic risk factors have been reported in studies based on European populations or populations of European ancestry, and data about the genetics of AD from other populations has been very limited. As China has the largest AD population in the world and because of the remarkable genetic differences between the East and the West, deciphering the genetic basis and molecular mechanism in Chinese patients with AD may add key points to the full characterization of AD. In this review, we present an overview of the current state of AD genetic research in China, with an emphasis on genome-level studies. We also describe the challenges and opportunities for future advances, especially for in-depth collaborations, brain bank construction, and primate animal modeling. There is an urgent need to promote public awareness and increase our collaborations and data sharing.
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Affiliation(s)
- Deng-Feng Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
| | - Min Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan 650204, China
| | - Rui Bi
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
| | - Yong-Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan 650223, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan 650204, China
- CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
- Kunming Institute of Zoology−Chinese University of Hong Kong Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
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35
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Procyanidins Extracted from Lotus Seedpod Ameliorate Amyloid- β-Induced Toxicity in Rat Pheochromocytoma Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4572893. [PMID: 30538801 PMCID: PMC6230407 DOI: 10.1155/2018/4572893] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/26/2018] [Accepted: 08/06/2018] [Indexed: 01/20/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease, which is characterized by extracellular senile plaque deposits, intracellular neurofibrillary tangles, and neuronal apoptosis. Amyloid-β (Aβ) plays a critical role in AD that may cause oxidative stress and downregulation of CREB/BDNF signaling. Anti-Aβ effect has been discussed as a potential therapeutic strategy for AD. This study aimed to identify the amelioration of procyanidins extracted from lotus seedpod (LSPC) on Aβ-induced damage with associated pathways for AD treatment. Rat pheochromocytoma (PC12) cells incubated with Aβ25–35 serve as an Aβ damage model to evaluate the effect of LSPC in vitro. Our findings illustrated that LSPC maintained the cellular morphology from deformation and reduced apoptosis rates of cells induced by Aβ25–35. The mechanisms of LSPC to protect cells from Aβ-induced damage were based on its regulation of oxidation index and activation of CREB/BDNF signaling, including brain-derived neurotrophic factor (BDNF) and phosphorylation of cAMP-responsive element-binding (CREB), protein kinase B (also known as AKT), and the extracellular signal-regulated kinase (ERK). Of note, by high-performance liquid chromatography-tandem mass spectroscopy (LC-MS/MS), several metabolites were detected to accumulate in vivo, part of which could take primary responsibility for the amelioration of Aβ-induced damage on PC12 cells. Taken together, our research elucidated the effect of LSPC on neuroprotection through anti-Aβ, indicating it as a potential pretreatment for Alzheimer's disease.
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Ikonomovic MD, Abrahamson EE, Carlson SW, Graham SH, Dixon CE. Novel therapies for combating chronic neuropathological sequelae of TBI. Neuropharmacology 2018; 145:160-176. [PMID: 29933008 DOI: 10.1016/j.neuropharm.2018.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 02/06/2023]
Abstract
Traumatic brain injury (TBI) is a risk factor for development of chronic neurodegenerative disorders later in life. This review summarizes the current knowledge and concepts regarding the connection between long-term consequences of TBI and aging-associated neurodegenerative disorders including Alzheimer's disease (AD), chronic traumatic encephalopathy (CTE), and Parkinsonism, with implications for novel therapy targets. Several aggregation-prone proteins such as the amyloid-beta (Aβ) peptides, tau proteins, and α-synuclein protein are involved in secondary pathogenic cascades initiated by a TBI and are also major building blocks of the hallmark pathological lesions in chronic human neurodegenerative diseases with dementia. Impaired metabolism and degradation pathways of aggregation-prone proteins are discussed as potentially critical links between the long-term aftermath of TBI and chronic neurodegeneration. Utility and limitations of previous and current preclinical TBI models designed to study the link between TBI and chronic neurodegeneration, and promising intervention pharmacotherapies and non-pharmacologic strategies to break this link, are also summarized. Complexity of long-term neuropathological consequences of TBI is discussed, with a goal of guiding future preclinical studies and accelerating implementation of promising therapeutics into clinical trials. This article is part of the Special Issue entitled "Novel Treatments for Traumatic Brain Injury".
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Affiliation(s)
- Milos D Ikonomovic
- Geriatric Research Education and Clinical Center, Pittsburgh VA Healthcare System, Pittsburgh, PA, USA; Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
| | - Eric E Abrahamson
- Geriatric Research Education and Clinical Center, Pittsburgh VA Healthcare System, Pittsburgh, PA, USA; Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Shaun W Carlson
- Geriatric Research Education and Clinical Center, Pittsburgh VA Healthcare System, Pittsburgh, PA, USA; Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Steven H Graham
- Geriatric Research Education and Clinical Center, Pittsburgh VA Healthcare System, Pittsburgh, PA, USA; Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - C Edward Dixon
- Geriatric Research Education and Clinical Center, Pittsburgh VA Healthcare System, Pittsburgh, PA, USA; Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Xin SH, Tan L, Cao X, Yu JT, Tan L. Clearance of Amyloid Beta and Tau in Alzheimer's Disease: from Mechanisms to Therapy. Neurotox Res 2018; 34:733-748. [PMID: 29626319 DOI: 10.1007/s12640-018-9895-1] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 03/19/2018] [Accepted: 03/21/2018] [Indexed: 01/02/2023]
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease. Pathological proteins of AD mainly contain amyloid-beta (Aβ) and tau. Their deposition will lead to neuron damage by a series of pathways, and then induce memory and cognitive impairment. Thus, it is pivotal to understand the clearance pathways of Aβ and tau in order to delay or even halt AD. Aβ clearance mechanisms include ubiquitin-proteasome system, autophagy-lysosome, proteases, microglial phagocytosis, and transport from the brain to the blood via the blood-brain barrier (BBB), arachnoid villi and blood-CSF barrier, which can be named blood circulatory clearance. Recently, lymphatic clearance has been demonstrated to play a key role in transport of Aβ into cervical lymph nodes. The discovery of meningeal lymphatic vessels is another direct evidence for lymphatic clearance in the brain. Furthermore, periphery clearance also contributes to Aβ clearance. Tau clearance is almost the same as Aβ clearance. In this review, we will mainly introduce the clearance mechanisms of Aβ and tau proteins, and summarize corresponding targeted drug therapies for AD.
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Affiliation(s)
- Shu-Hui Xin
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, Shandong, China
| | - Lin Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, Shandong, China
| | - Xipeng Cao
- Clinical Research Center, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, Shandong, China. .,Clinical Research Center, Qingdao Municipal Hospital, Qingdao University, Qingdao, China.
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, Shandong, China.
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Fang Y, Gao T, Zhang B, Pu J. Recent Advances: Decoding Alzheimer's Disease With Stem Cells. Front Aging Neurosci 2018; 10:77. [PMID: 29623038 PMCID: PMC5874773 DOI: 10.3389/fnagi.2018.00077] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 03/07/2018] [Indexed: 12/13/2022] Open
Abstract
Alzheimer’s disease (AD) is an irreversible neurodegenerative disorder that destroys cognitive functions. Recently, a number of high-profile clinical trials based on the amyloid cascade hypothesis have encountered disappointing results. The failure of these trials indicates the necessity for novel therapeutic strategies and disease models. In this review, we will describe how recent advances in stem cell technology have shed light on a novel treatment strategy and revolutionized the mechanistic investigation of AD pathogenesis. Current advances in promoting endogenous neurogenesis and transplanting exogenous stem cells from both bench research and clinical translation perspectives will be thoroughly summarized. In addition, reprogramming technology-based disease modeling, which has shown improved efficacy in recapitulating pathological features in human patients, will be discussed.
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Affiliation(s)
- Yi Fang
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ting Gao
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Baorong Zhang
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiali Pu
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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39
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Han P, Liu G, Lu X, Cao M, Yan Y, Zou J, Li X, Wang G. CDH1 rs9929218 variant at 16q22.1 contributes to colorectal cancer susceptibility. Oncotarget 2018; 7:47278-47286. [PMID: 27259261 PMCID: PMC5216941 DOI: 10.18632/oncotarget.9758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 05/08/2016] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer. Large-scale genome-wide association studies (GWAS) have been performed and reported some novel CRC susceptibility variants in European ancestry including the CDH1 rs9929218. Following GWAS and candidate studies evaluated the association between the CDH1 rs9929218 polymorphism and CRC in European, Asian and American populations. However, these studies reported inconsistent associations. Evidence shows that rs9929218 may regulate different gene expressions in different human tissues. Here, we reevaluated this association using large-scale samples from 16 studies (n=131768) using a meta-analysis method. In heterogeneity test, we did not identify significant heterogeneity among these studies. Meta-analysis using fixed effect model showed significant association between rs9929218 and CRC (P=6.16E-21, odds ratio (OR) =0.92, 95% confidence interval (CI) 0.91-0.94). In order to validate the effect of rs9929218 variant on CDH1 expression, we further performed a functional analysis using two large-scale expression datasets. We identified significant regulation relation between rs9929218 variant and the expression of CDH1, ZFP90, RP11-354M1.2 and MCOLN2 by both cis-effect and trans-effect. In summary, our analysis highlights significant association between rs9929218 polymorphism and CRC susceptibility.
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Affiliation(s)
- Peng Han
- Department of Colorectal Surgery, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, 150040, China
| | - Guiyou Liu
- Genome Analysis Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Xin Lu
- Department of Gastroenterology, The First Hospital of Harbin, Harbin, 150001, China
| | - Minmin Cao
- Department of Endocrinology, The First Hospital of Harbin, Harbin, 150001, China
| | - Youling Yan
- Department of Gastroenterology, The First Hospital of Harbin, Harbin, 150001, China
| | - Jing Zou
- Department of Hematology, The First Hospital of Harbin, Harbin, 150001, China
| | - Xiaobo Li
- Department of Pathology, Harbin Medical University, Harbin, 150081, China
| | - Guangyu Wang
- Department of Gastrointestinal Medical Oncology, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, 150040, China
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40
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Peters KE, Davis WA, Taddei K, Martins RN, Masters CL, Davis TME, Bruce DG. Plasma Amyloid-β Peptides in Type 2 Diabetes: A Matched Case-Control Study. J Alzheimers Dis 2018; 56:1127-1133. [PMID: 28106562 DOI: 10.3233/jad-161050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Plasma amyloid-β (Aβ) levels have rarely been investigated in type 2 diabetes despite its known associations with Alzheimer's disease. OBJECTIVE To compare blood plasma Aβ concentrations (Aβ40 and Aβ42) in cognitively normal individuals with and without type 2 diabetes. METHODS Plasma Aβ40 and Aβ42 were measured in 194 participants with diabetes recruited from the community-based Fremantle Diabetes Study Phase II cohort (mean age 71 years, 59% males) and 194 age-, sex-, and APOEɛ4 allele-matched, control subjects without diabetes from the Australian Imaging, Biomarkers and Lifestyle Study using a multiplex microsphere-based immunoassay. RESULTS Plasma Aβ40 and Aβ42 were normally distributed in the controls but were bimodal in the participants with diabetes. Median Aβ40 and Aβ42 concentrations were significantly lower in those with type 2 diabetes (Aβ40 median [inter-quartile range]: 125.0 [52.6-148.3] versus 149.3 [134.0-165.6] pg/mL; Aβ42: 26.9 [14.5-38.3] versus 33.6 [28.0-38.9] pg/mL, both p < 0.001) while the ratio Aβ42:Aβ40 was significantly higher (0.26 [0.23-0.32] versus 0.22 [0.19-0.25], p < 0.001). After adjustment, participants with diabetes and plasma Aβ40 levels in the low peak of the bimodal distribution were significantly more likely to have normal to high estimated glomerular filtration rates (odds ratio (95% CI): 2.40 (1.20-4.80), p = 0.013) although the group with diabetes had lower renal function overall. CONCLUSION Type 2 diabetes is associated with altered plasma concentrations of Aβ peptides and is an important source of variation that needs to be taken into account when considering plasma Aβ peptides as biomarkers for Alzheimer's disease.
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Affiliation(s)
- Kirsten E Peters
- School of Medicine and Pharmacology, University of Western Australia, Fremantle, WA, Australia
| | - Wendy A Davis
- School of Medicine and Pharmacology, University of Western Australia, Fremantle, WA, Australia
| | - Kevin Taddei
- School of Medical Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Ralph N Martins
- School of Medical Sciences, Edith Cowan University, Joondalup, WA, Australia.,Department of Biomedical Sciences, Macquarie University, NSW, Australia
| | - Colin L Masters
- The Florey Institute, University of Melbourne, Parkville, Vic., Australia
| | - Timothy M E Davis
- School of Medicine and Pharmacology, University of Western Australia, Fremantle, WA, Australia
| | - David G Bruce
- School of Medicine and Pharmacology, University of Western Australia, Fremantle, WA, Australia
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41
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van Dyck CH. Anti-Amyloid-β Monoclonal Antibodies for Alzheimer's Disease: Pitfalls and Promise. Biol Psychiatry 2018; 83:311-319. [PMID: 28967385 PMCID: PMC5767539 DOI: 10.1016/j.biopsych.2017.08.010] [Citation(s) in RCA: 343] [Impact Index Per Article: 57.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/27/2017] [Accepted: 08/12/2017] [Indexed: 12/25/2022]
Abstract
The majority of putative disease-modifying treatments in development for Alzheimer's disease are directed against the amyloid-β (Aβ) peptide. Among the anti-Aβ therapeutic approaches, the most extensively developed is immunotherapy-specifically, passive immunization through administration of exogenous monoclonal antibodies (mAbs). Although testing of mAbs has been fraught with failure and confusing results, the experience gained from these trials has provided important clues for better treatments. This review summarizes the experience to date with anti-Aβ mAbs to enter clinical trials for Alzheimer's disease and examines the evidence for clinical efficacy and the major problems with safety-i.e., amyloid-related imaging abnormalities. As mAbs differ considerably with regard to their epitopes and the conformations of Aβ that they recognize (monomers, oligomers, protofibrils, fibrils), the consequences of targeting different species are also considered. An often-cited explanation for the failure of anti-Aβ mAb trials is that they are set too late in the disease process. New trials are indeed evaluating treatments at prodromal and preclinical stages. We should expect to see additional studies of presymptomatic Alzheimer's disease to join the ongoing prevention trials, for which mAbs continue to serve as the mainstay.
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Affiliation(s)
- Christopher H. van Dyck
- Alzheimer’s Disease Research Unit and Departments of Psychiatry, Neuroscience, and Neurology, Yale University School of Medicine, New Haven, Connecticut
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42
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Ettcheto M, Sánchez-López E, Gómez-Mínguez Y, Cabrera H, Busquets O, Beas-Zarate C, García ML, Carro E, Casadesus G, Auladell C, Vázquez Carrera M, Folch J, Camins A. Peripheral and Central Effects of Memantine in a Mixed Preclinical Mice Model of Obesity and Familial Alzheimer's Disease. Mol Neurobiol 2018; 55:7327-7339. [PMID: 29404958 DOI: 10.1007/s12035-018-0868-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 01/07/2018] [Indexed: 01/01/2023]
Abstract
There is growing evidence that obesity associated with type 2 diabetes mellitus (T2DM) and aging are risk factors for the development of Alzheimer's disease (AD). However, the molecular mechanisms through which obesity interacts with β-amyloid (Aβ) to promote cognitive decline remains poorly understood. Memantine (MEM), a N-methyl-D-aspartate receptor antagonist, is currently used for the treatment of AD. Nonetheless, few studies have reported its effects on genetic preclinical models of this neurodegenerative disease exacerbated with high-fat diet (HFD)-induced obesity. Therefore, the present research aims to elucidate the effects of MEM on familial AD HFD-induced insulin resistance and learning and memory impairment. Furthermore, it aspires to determine the possible underlying mechanisms that connect AD to T2DM. Wild type and APPswe/PS1dE9 mice were used in this study. The animals were fed with either chow or HFD until 6 months of age, and they were treated with MEM-supplemented water (30 mg/kg) during the last 12 weeks. Our study demonstrates that MEM improves the metabolic consequences produced by HFD in this model of familial AD. Behavioural assessments confirmed that the treatment also improves animals learning abilities and decreases memory loss. Moreover, MEM treatment improves brain insulin signalling upregulating AKT, as well as cyclic adenosine monophosphate response element binding (CREB) expression, and modulates the amyloidogenic pathway, which, in turn, reduced the accumulation of Aβ. Moreover, this drug increases the activation of molecules involved with insulin signalling in the liver, such as insulin receptor substrate 2 (IRS2), which is a key protein regulating hepatic resistance to insulin. These results provide new insight into the role of MEM not only in the occurrence of AD treatment, but also in its potential application on peripheral metabolic disorders where Aβ plays a key role, as is the case of T2DM.
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Affiliation(s)
- Miren Ettcheto
- Departament de Farmacología, Toxicologia i Quimica Terapéutica, Unitat de Farmacologia i Farmacognosia, Facultat de Farmacia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII s/n, 08028, Barcelona, Spain.,Biomedical Research Networking Center in Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Unitat de Bioquímica i Biotecnologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Tarragona, Spain.,Institut de Neurociencias, Universitat de Barcelona, Barcelona, Spain
| | - Elena Sánchez-López
- Biomedical Research Networking Center in Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Unitat de Farmacia, Tecnologia Farmacèutica i Fisico-química, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
| | - Yaiza Gómez-Mínguez
- Departament de Farmacología, Toxicologia i Quimica Terapéutica, Unitat de Farmacologia i Farmacognosia, Facultat de Farmacia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII s/n, 08028, Barcelona, Spain
| | - Henrry Cabrera
- Departament de Farmacología, Toxicologia i Quimica Terapéutica, Unitat de Farmacologia i Farmacognosia, Facultat de Farmacia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII s/n, 08028, Barcelona, Spain
| | - Oriol Busquets
- Departament de Farmacología, Toxicologia i Quimica Terapéutica, Unitat de Farmacologia i Farmacognosia, Facultat de Farmacia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII s/n, 08028, Barcelona, Spain.,Biomedical Research Networking Center in Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Unitat de Bioquímica i Biotecnologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Tarragona, Spain.,Institut de Neurociencias, Universitat de Barcelona, Barcelona, Spain
| | - Carlos Beas-Zarate
- Departamento de Biología Celular y Molecular, C.U.C.B.A, Universidad de Guadalajara and División de Neurociencias, Sierra Mojada 800, Col. Independencia, 44340, Guadalajara, Jalisco, Mexico
| | - Maria Luisa García
- Unitat de Farmacia, Tecnologia Farmacèutica i Fisico-química, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
| | - Eva Carro
- Neurodegenerative Disorders Group, Instituto de Investigacion Hospital 12 de Octubre (i + 12), Madrid, Spain
| | - Gemma Casadesus
- Department of Biological Sciences, Kent State University, Kent, OH, USA
| | - Carme Auladell
- Departament de Biologia Cel·lular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - Manuel Vázquez Carrera
- Departament de Farmacología, Toxicologia i Quimica Terapéutica, Unitat de Farmacologia i Farmacognosia, Facultat de Farmacia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII s/n, 08028, Barcelona, Spain.,Institute of Biomedicine of the University of Barcelona (IBUB), Barcelona, Spain.,Spanish Biomedical Research Center in Diabetes and Associated Metabolic Diseases (CIBERDEM)-Instituto de Salud Carlos III, Barcelona, Spain.,Research Institute-Hospital Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
| | - Jaume Folch
- Biomedical Research Networking Center in Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Unitat de Bioquímica i Biotecnologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Tarragona, Spain
| | - Antoni Camins
- Departament de Farmacología, Toxicologia i Quimica Terapéutica, Unitat de Farmacologia i Farmacognosia, Facultat de Farmacia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII s/n, 08028, Barcelona, Spain. .,Biomedical Research Networking Center in Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain. .,Institut de Neurociencias, Universitat de Barcelona, Barcelona, Spain.
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Tousley A, Kegel-Gleason KB. Induced Pluripotent Stem Cells in Huntington's Disease Research: Progress and Opportunity. J Huntingtons Dis 2017; 5:99-131. [PMID: 27372054 PMCID: PMC4942721 DOI: 10.3233/jhd-160199] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Induced pluripotent stem cells (iPSCs) derived from controls and patients can act as a starting point for in vitro differentiation into human brain cells for discovery of novel targets and treatments for human disease without the same ethical limitations posed by embryonic stem cells. Numerous groups have successfully produced and characterized Huntington’s disease (HD) iPSCs with different CAG repeat lengths, including cells from patients with one or two HD alleles. HD iPSCs and the neural cell types derived from them recapitulate some disease phenotypes found in both human patients and animal models. Although these discoveries are encouraging, the use of iPSCs for cutting edge and reproducible research has been limited due to some of the inherent problems with cell lines and the technological differences in the way laboratories use them. The goal of this review is to summarize the current state of the HD iPSC field, and to highlight some of the issues that need to be addressed to maximize their potential as research tools.
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Affiliation(s)
| | - Kimberly B. Kegel-Gleason
- Correspondence to: Kimberly Kegel-Gleason, Assistant Professor in Neurology, Massachusetts General Hospital and Harvard Medical School, 114 16th Street, Room 2001, Charlestown, MA 02129, USA. Tel.: +1 617 724 8754; E-mail:
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44
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Wu QJ, Sun SY, Yan CJ, Cheng ZC, Yang MF, Li ZF, Cheng HW, Fang TK. EXOC3L2 rs597668 variant contributes to Alzheimer's disease susceptibility in Asian population. Oncotarget 2017; 8:20086-20091. [PMID: 28423615 PMCID: PMC5386745 DOI: 10.18632/oncotarget.15380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 01/11/2017] [Indexed: 12/12/2022] Open
Abstract
Recent genome-wide association studies have established the association between EXOC3L2 rs597668 variant and Alzheimer's disease (AD) in European population. However, recent studies reported inconsistent results in Asian population. Here, we performed a systematic review and meta-analysis to evaluate the impact of rs597668 on AD risk in Asian population using a total of 8686 samples including 2855 cases and 5831 controls. Meanwhile, we selected 17,008 AD cases and 37,154 controls in European population to evaluate the potential heterogeneity between East Asian and European populations. In East Asian population, we identified no potential heterogeneity with P=0.31 and I2 = 15.8%. By meta-analysis, we identified positive association between rs597668 and AD risk with P=0.023, OR=0.93, 95% CI 0.87-0.99. We further found significant heterogeneity in pooled Asian and European populations with P<0.0001 and I2 = 87.7%. The meta-analysis indicated negative association with P=0.66, OR=0.97, 95% CI 0.85-1.11. In summary, all these findings indicate that rs597668 C allele is a risk factor for AD in European population with OR=1.18 and P=2.49E-13. However the rs597668 C allele played a protective role in AD with OR=0.93 and P=0.023 in East Asian population.
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Affiliation(s)
- Qing-Jian Wu
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China.,Department of Neurology, Shandong University School of Medicine, Jinan, Shandong, 250012, China.,Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, 271000, China
| | - Shu-Yin Sun
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
| | - Cheng-Jun Yan
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
| | - Zi-Cui Cheng
- Department of Encephalopathy Rehabiliation Center, Taian Traditional Chinese Medical Hospital, Taian, Shandong, 271000, China
| | - Ming-Feng Yang
- Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, 271000, China
| | - Zi-Fei Li
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
| | - Hou-Wen Cheng
- Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, 271000, China
| | - Ti-Kun Fang
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
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45
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Choi TS, Lee HJ, Han JY, Lim MH, Kim HI. Molecular Insights into Human Serum Albumin as a Receptor of Amyloid-β in the Extracellular Region. J Am Chem Soc 2017; 139:15437-15445. [DOI: 10.1021/jacs.7b08584] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tae Su Choi
- Department
of Chemistry, Korea University, Seoul 02841, Republic of Korea
- Department
of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | | | - Jong Yoon Han
- Department
of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | | | - Hugh I. Kim
- Department
of Chemistry, Korea University, Seoul 02841, Republic of Korea
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46
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Zhang C, Li X, Zhang W, Wang Y, Fan G, Wang W, Chen S, Qin H, Zhang X. Common genetic variant rs3802842 in 11q23 contributes to colorectal cancer risk in Chinese population. Oncotarget 2017; 8:72227-72234. [PMID: 29069782 PMCID: PMC5641125 DOI: 10.18632/oncotarget.19702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/28/2017] [Indexed: 11/25/2022] Open
Abstract
A genome-wide association study identified a common genetic variant rs3802842 at 11q23 to be associated with CRC risk with OR=1.1 and P = 5.80E-10 in European population. In Chinese population, several genetic association studies have investigated the association between rs3802842 variant and CRC risk. However these studies reported both positive and negative association results. It is still necessary to evaluate a specific variant in a specific population, which would be informative to reveal the disease mechanism. Until recently, there is no a systemic study to evaluate the potential association between rs3802842 and CRC risk in Chinese population by a meta-analysis method. Here, we aim to evaluate this association in Chinese population by a meta-analysis method using 12077 samples including 5816 CRC cases and 6261 controls. We identified the T allele of rs3802842 to be significantly related with an increase CRC risk (P=2.22E-05, OR=1.14, 95% CI 1.07-1.21) in Chinese population.
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Affiliation(s)
- Chunze Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xichuan Li
- Department of Immunology, Biochemistry and Molecular Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin 300070, China
| | - Weihua Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Yijia Wang
- Department of Pathology, Tianjin Union Medical Center, Tianjin 300121, China
| | - Guanwei Fan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.,State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Wenhong Wang
- Department of Imaging, Tianjin Union Medical Center, Tianjin 300121, China
| | - Shuo Chen
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Hai Qin
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
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47
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Jin WS, Shen LL, Bu XL, Zhang WW, Chen SH, Huang ZL, Xiong JX, Gao CY, Dong Z, He YN, Hu ZA, Zhou HD, Song W, Zhou XF, Wang YZ, Wang YJ. Peritoneal dialysis reduces amyloid-beta plasma levels in humans and attenuates Alzheimer-associated phenotypes in an APP/PS1 mouse model. Acta Neuropathol 2017; 134:207-220. [PMID: 28477083 DOI: 10.1007/s00401-017-1721-y] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 05/01/2017] [Accepted: 05/02/2017] [Indexed: 01/02/2023]
Abstract
Clearance of amyloid-beta (Aβ) from the brain is an important therapeutic strategy for Alzheimer's disease (AD). Current studies mainly focus on the central approach of Aβ clearance by introducing therapeutic agents into the brain. In a previous study, we found that peripheral tissues and organs play important roles in clearing brain-derived Aβ, suggesting that the peripheral approach of removing Aβ from the blood may also be effective for AD therapy. Here, we investigated whether peritoneal dialysis, a clinically available therapeutic method for chronic kidney disease (CKD), reduces brain Aβ burden and attenuates AD-type pathologies and cognitive impairments. Thirty patients with newly diagnosed CKD were enrolled. The plasma Aβ concentrations of the patients were measured before and after peritoneal dialysis. APP/PS1 mice were subjected to peritoneal dialysis once a day for 1 month from 6 months of age (prevention study) or 9 months of age (treatment study). The Aβ in the interstitial fluid (ISF) was collected using microdialysis. Behavioural performance, long-term potentiation (LTP), Aβ burden and other AD-type pathologies were measured after 1 month of peritoneal dialysis. Peritoneal dialysis significantly reduced plasma Aβ levels in both CKD patients and APP/PS1 mice. Aβ levels in the brain ISF of APP/PS1 mice immediately decreased after reduction of Aβ in the blood during peritoneal dialysis. In both prevention and treatment studies, peritoneal dialysis substantially reduced Aβ deposition, attenuated other AD-type pathologies, including Tau hyperphosphorylation, glial activation, neuroinflammation, neuronal loss, and synaptic dysfunction, and rescued the behavioural deficits of APPswe/PS1 mice. Importantly, the Aβ phagocytosis function of microglia was enhanced in APP/PS1 mice after peritoneal dialysis. Our study suggests that peritoneal dialysis is a promising therapeutic method for AD, and Aβ clearance using a peripheral approach could be a desirable therapeutic strategy for AD.
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Affiliation(s)
- Wang-Sheng Jin
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Lin-Lin Shen
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Xian-Le Bu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Wei-Wei Zhang
- Department of Nephrology, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Si-Han Chen
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Zhi-Lin Huang
- Ministry of Education Key Laboratory of Child Development and Disorders and Chongqing Key Laboratory of Translational Medical Research in Cognitive Development and Learning and Memory Disorders, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Jia-Xiang Xiong
- Department of Physiology, Third Military Medical University, Chongqing, China
| | - Chang-Yue Gao
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Zhifang Dong
- Ministry of Education Key Laboratory of Child Development and Disorders and Chongqing Key Laboratory of Translational Medical Research in Cognitive Development and Learning and Memory Disorders, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Ya-Ni He
- Department of Nephrology, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Zhi-An Hu
- Department of Physiology, Third Military Medical University, Chongqing, China
| | - Hua-Dong Zhou
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Weihong Song
- Townsend Family Laboratories, Department of Psychiatry, Center for Brain Health, The University of British Columbia, Vancouver, BC, V6T1Z3, Canada
| | - Xin-Fu Zhou
- School of Pharmacy and Medical Sciences and Sansom Institute, University of South Australia, Adelaide, Australia
| | - Yi-Zheng Wang
- Laboratory of Neural Signal Transduction, Institute of Neuroscience, Chinese Academy of Science, Shanghai, China
| | - Yan-Jiang Wang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China.
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48
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Mei WW, Ji SS, Xiao W, Wang XD, Jiang CS, Ma WQ, Zhang HY, Gong JX, Guo YW. Synthesis and biological evaluation of benzothiazol-based 1,3,4-oxadiazole derivatives as amyloid β-targeted compounds against Alzheimer’s disease. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-1993-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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49
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Zhang C, Li X, Fu W, Wang Y, Wang T, Wang W, Chen S, Qin H, Zhang X. SMAD7 rs4939827 variant contributes to colorectal cancer risk in Chinese population. Oncotarget 2017; 8:41125-41131. [PMID: 28467803 PMCID: PMC5522279 DOI: 10.18632/oncotarget.17065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 03/11/2017] [Indexed: 01/10/2023] Open
Abstract
A genome-wide association study identified a common genetic variant rs4939827 at 18q21 in SMAD7 to be related with colorectal cancer (CRC) risk with OR=1.2 and P =7.80E-28. Until recently, several meta-analysis studies have been conducted, and reported significant association between rs4939827 and CRC risk. However none of these studies evaluated the potential association between rs4939827 and CRC risk in Chinese population. In this study, we evaluated this association by a meta-analysis using 12077 samples including 5816 CRC cases and 6261 controls. In the end, we identified the T allele of rs4939827 to be significantly related with an increase CRC risk (P=2.22E-05, OR=1.14, 95% CI 1.07-1.21) in Chinese population.
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Affiliation(s)
- Chunze Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xichuan Li
- Department of Immunology, Biochemistry and Molecular Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin 300070, China
| | - Wenzheng Fu
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Yijia Wang
- Department of Pathology, Tianjin Union Medical Center, Tianjin 300121, China
| | - Tao Wang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Wenhong Wang
- Department of Imaging, Tianjin Union Medical Center, Tianjin 300121, China
| | - Shuo Chen
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Hai Qin
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
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50
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Nighot PK, Leung L, Ma TY. Chloride channel ClC- 2 enhances intestinal epithelial tight junction barrier function via regulation of caveolin-1 and caveolar trafficking of occludin. Exp Cell Res 2017; 352:113-122. [PMID: 28161538 DOI: 10.1016/j.yexcr.2017.01.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 01/09/2017] [Accepted: 01/31/2017] [Indexed: 12/16/2022]
Abstract
Previous studies have demonstrated that the chloride channel ClC-2 plays a critical role in intestinal epithelial tight junction (TJ) barrier function via intracellular trafficking of TJ protein occludin. To study the mechanism of ClC-2-mediated TJ barrier function and intracellular trafficking of occludin, we established ClC-2 over-expressing Caco-2 cell line (Caco-2CLCN2) by full length ClC-2 ORF transfection. ClC-2 over-expression (Caco-2CLCN2) significantly enhanced TJ barrier (increased TER by ≥2 times and reduced inulin flux by 50%) compared to control Caco-2pEZ cells. ClC-2 over-expression (Caco-2CLCN2) increased occludin protein level compared to control Caco-2pEZ cells. Surface biotinylation assay revealed reduced steady state endocytosis of occludin in Caco-2CLCN2 cells. Furthermore, ClC-2 over-expression led to reduction in caveolin-1 protein level and diminishment of caveolae assembly. Caveolae disruption increased TJ permeability in control but not ClC-2 over-expressing Caco-2CLCN2 cells. Selective ClC-2 channel blocker GaTx2 caused an increase in caveolin-1 protein level and reduced occludin level. Delivery of cell permeable caveolin-1 scaffolding domain reduced the occludin protein level. Over all, these results suggest that ClC- 2 enhances TJ barrier function in intestinal epithelial cells via regulation of caveolin-1 and caveolae-mediated trafficking of occludin.
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Affiliation(s)
- Prashant K Nighot
- Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA.
| | - Lana Leung
- Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA
| | - Thomas Y Ma
- Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA
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