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Deng JL, Huang LF, Bian ZY, Feng XY, Qi RY, Dong WX, Gao JM, Tang JJ. A new neuroprotective candidate TJ1 targeting amyloidogenesis in 5xFAD Alzheimer's disease mice. Int Immunopharmacol 2024; 138:112653. [PMID: 38996664 DOI: 10.1016/j.intimp.2024.112653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/27/2024] [Accepted: 07/06/2024] [Indexed: 07/14/2024]
Abstract
As one of the main pathmechanisms of Alzheimer's disease (AD), amyloid-β (Aβ) is widely considered to be the prime target for the development of AD therapy. Recently, imidazolylacetophenone oxime ethers or esters (IOEs) have shown neuroprotective effects against neuronal cells damage, suggesting their potential use in the prevention and treatment of AD. Thirty IOEs compounds from our lab in-house library were constructed and screened for the inhibitory effects on Aβ42-induced cytotoxicity. Among them, TJ1, as a new IOEs hit, preliminarily showed the effect on inhibiting Aβ42-induced cytotoxicity. Furthermore, the inhibitory effects of TJ1 on Aβ42 aggregation were tested by ThT assays and TEM. The neuroprotective effects of TJ1 were evaluated in Aβ42-stimulated SH-SY5Y cells, LPS-stimulated BV-2 cells, and H2O2- and RSL3-stimulated PC12 cells. The cognitive improvement of TJ1 was assessed in 5xFAD (C57BL/6J) transgenic mouse. These results showed that TJ1 had strong neuroprotective effects and high blood-brain barrier (BBB) permeability without obvious cytotoxicity. TJ1 impeded the self-accumulation process of Aβ42 by acting on Aβ oligomerization and fibrilization. Besides, TJ1 reversed Aβ-, H2O2- and RSL3-induced neuronal cell damage and decreased neuroinflammation. In 5xFAD mice, TJ1 improved cognitive impairment, increased GSH level, reduced the level of Aβ42 and Aβ plaques, and attenuated the glia reactivation and inflammatory response in the brain,. Taken together, our results demonstrate that TJ1 improves cognitive impairments as a new neuroprotective candidate via targeting amyloidogenesis, which suggests the potential of TJ1 as a treatment for AD.
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Affiliation(s)
- Jia-Le Deng
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China
| | - Lan-Fang Huang
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China
| | - Zhao-Yuan Bian
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China
| | - Xu-Yao Feng
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China
| | - Ruo-Yu Qi
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China
| | - Wei-Xuan Dong
- The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China
| | - Jiang-Jiang Tang
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, China.
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Tang JJ, Huang LF, Deng JL, Wang YM, Guo C, Peng XN, Liu Z, Gao JM. Cognitive enhancement and neuroprotective effects of OABL, a sesquiterpene lactone in 5xFAD Alzheimer's disease mice model. Redox Biol 2022; 50:102229. [PMID: 35026701 PMCID: PMC8760418 DOI: 10.1016/j.redox.2022.102229] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 12/13/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease in which oxidative stress and neuroinflammation were demonstrated to be associated with neuronal loss and cognitive deficits. However, there are still no specific treatments that can prevent the progression of AD. In this study, a screening of anti-inflammatory hits from 4207 natural compounds of two different molecular libraries indicated 1,6-O,O-diacetylbritannilactone (OABL), a 1,10-seco-eudesmane sesquiterpene lactone isolated from the herb Inula britannica L., exhibited strong anti-inflammatory activity in vitro as well as favorable BBB penetration property. OABL reduced LPS-induced neuroinflammation in BV-2 microglial cells as assessed by effects on the levels of inflammatory mediators including NO, PGE2, TNF-α, iNOS, and COX-2, as well as the translocation of NF-κB. Besides, OABL also exhibited pronounced neuroprotective effects against oxytosis and ferroptosis in the rat pheochromocytoma PC12 cell line. For in vivo research, OABL (20 mg/kg B.W., i.p.) for 21 d attenuated the impairments in cognitive function observed in 6-month-old 5xFAD mice, as assessed with the Morris water maze test. OABL restored neuronal damage and postsynaptic density protein 95 (PSD95) expression in the hippocampus. OABL also significantly reduced the accumulation of amyloid plaques, the Aβ expression, the phosphorylation of Tau protein, and the expression of BACE1 in AD mice brain. In addition, OABL attenuated the overactivation of microglia and astrocytes by suppressing the expressions of inflammatory cytokines, and increased glutathione (GSH) and reduced malondialdehyde (MDA) and super oxide dismutase (SOD) levels in the 5xFAD mice brain. In conclusion, these results highlight the beneficial effects of the natural product OABL as a novel treatment with potential application for drug discovery in AD due to its pharmacological profile.
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Affiliation(s)
- Jiang-Jiang Tang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China.
| | - Lan-Fang Huang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Jia-Le Deng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Yi-Meng Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Cong Guo
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Xiao-Na Peng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Zhigang Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, PR China.
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, PR China.
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Shi Y, Qi H. Effects of Different Seaweed Bioactive Compounds on Neurodegenerative Disorders, Potential Uses on Insomnia: A Mini-review. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1929301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yixin Shi
- School of Food Science and Technology, Dalian Polytechnic University, National Engineering Research Center of Seafood, Dalian, P. R. China
| | - Hang Qi
- School of Food Science and Technology, Dalian Polytechnic University, National Engineering Research Center of Seafood, Dalian, P. R. China
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Alakeel A. Acceptance of Teledermatological Practices: A Cross-Sectional Study of Practicing Saudi Dermatologists. Cureus 2021; 13:e13710. [PMID: 33824842 PMCID: PMC8016530 DOI: 10.7759/cureus.13710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background: The increase in demand for Telemedicine globally has continued to rise in recent months, showing remarkable success in a variety of medical fields. As dermatology shows one of the most prolific rates of success, having a clear national picture of practitioner opinion on the subject is important. In this study we aimed to quantify the overall level of acceptance and satisfaction of Saudi dermatologists towards the practice of teledermatology. Design and setting: Data was collected by means of a survey which included demographic data and level of exposure and overall satisfaction towards Telemedicine in their field. Results: A total of 102 questionnaires were returned of which 57.8% had engaged in at least one teleconsultation. Of these, 71.2% showed support for the technology, with negative responses being associated with poor infrastructure or implementation in the workplace. Conclusion: The acceptance of dermatologists to teledermatology consultations in Saudi Arabia shows a positive tendency, with the majority of those who engaged in the practice saying they would do so again and find it satisfactory. Creating more reliable and robust tools and greater training in their use would be beneficial for its further incorporation.
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Affiliation(s)
- Abdullah Alakeel
- Dermatology Department, College of Medicine, King Saud University, Riyadh, SAU
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Fernandes BKC, Clares JWB, Borges CL, Nóbrega MMLD, Freitas MCD. Nursing diagnoses for institutionalized elderly people based on Henderson's theory. Rev Esc Enferm USP 2019; 53:e03472. [PMID: 31166459 DOI: 10.1590/s1980-220x2018004103472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 12/13/2018] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE To develop nursing diagnostic statements for institutionalized elderly people. METHOD Descriptive study conducted with elderly subjects of a Long Stay Institution through the application of forms for the support of anamnesis and physical examination and a search of medical records. The diagnostic statements were developed based on the International Classification for Nursing Practice and categorized according to the Henderson's theoretical model. RESULTS Participation of 203 elderly people. A total of 153 nursing diagnoses were developed and distributed as follows: 115 (75.1%) in the Biological/Physiological Component, 14 (9.1%) in the Psychological Component, 21 (13.7%) in the Social Component, and three (1.9%) in the Spiritual/Moral Component. CONCLUSION The diagnostic statements portray situations of vulnerability to the health of institutionalized elderly that are influenced by biological, psychological, social and cultural factors and require a systematized, individualized and resolutive care for this public.
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Affiliation(s)
| | - Jorge Wilker Bezerra Clares
- Universidade Estadual do Ceará, Programa de Pós-Graduação em Cuidados Clínicos em Enfermagem e Saúde, Fortaleza, CE, Brazil
| | | | | | - Maria Célia de Freitas
- Universidade Estadual do Ceará, Programa de Pós-Graduação em Cuidados Clínicos em Enfermagem e Saúde, Fortaleza, CE, Brazil
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Yang EJ, Mahmood U, Kim H, Choi M, Choi Y, Lee JP, Cho JY, Hyun JW, Kim YS, Chang MJ, Kim HS. Phloroglucinol ameliorates cognitive impairments by reducing the amyloid β peptide burden and pro-inflammatory cytokines in the hippocampus of 5XFAD mice. Free Radic Biol Med 2018; 126:221-234. [PMID: 30118828 DOI: 10.1016/j.freeradbiomed.2018.08.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 08/10/2018] [Accepted: 08/13/2018] [Indexed: 01/29/2023]
Abstract
Among the various causative factors involved in the pathogenesis of Alzheimer's disease (AD), oxidative stress has emerged as an important factor. Phloroglucinol is a polyphenol component of phlorotannin, which is found at sufficient levels in Ecklonia cava (E. cava). Phloroglucinol has been reported to exert antioxidant activities in various tissues. Previously, we reported that the stereotaxic injection of phloroglucinol regulated synaptic plasticity in an AD mouse model. In this study, we aimed to investigate the effects of oral administration of phloroglucinol in AD. The oral administration of phloroglucinol for 2 months attenuated the impairments in cognitive function observed in 6-month-old 5X familial AD (5XFAD) mice, as assessed with the T-maze and Y-maze tests. The administration of phloroglucinol for 2 months in 5XFAD mice caused a reduction in the number of amyloid plaques and in the protein level of BACE1, a major amyloid precursor protein cleavage enzyme, together with γ-secretase. Phloroglucinol also restored the reduction in dendritic spine density and the number of mature spines in the hippocampi of 5XFAD mice. In addition, phloroglucinol-administered 5XFAD mice displayed lower protein levels of GFAP and Iba-1 and mRNA levels of TNF-α and IL-6 compared with vehicle-administered 5XFAD mice. These results demonstrated that phloroglucinol alleviated the neuropathological features and behavioral phenotypes in the 5XFAD mouse model. Taken together, our results suggest that phloroglucinol has therapeutic potential for AD treatment.
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Affiliation(s)
- Eun-Jeong Yang
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea; Department of Biomedical Sciences, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Usman Mahmood
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Hyunju Kim
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea; Department of Biomedical Sciences, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Moonseok Choi
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea; Department of Biomedical Sciences, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Yunjung Choi
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea; Department of Biomedical Sciences, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Jean-Pyo Lee
- Department of Physiology, Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Ave, New Orleans, LA 70112, USA
| | - Joo-Youn Cho
- Department of Clinical Pharmacology & Therapeutics, College of Medicine, Seoul National University and Hospital, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Jin Won Hyun
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Yong Sik Kim
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea
| | - Moon-Jeong Chang
- Department of Foods and Nutrition, College of Natural Science, Kookmin University, Seoul 02707, Republic of Korea.
| | - Hye-Sun Kim
- Department of Pharmacology, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea; Department of Biomedical Sciences, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea; Seoul National University Bundang Hospital, Seongnam, Sungnam, Bundang-Gu 13620, Republic of Korea; Neuroscience Research Institute, Seoul National University, College of Medicine, 103 Daehakro, Jongro-gu, Seoul 03080, Republic of Korea.
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Abstract
Skin problems are common within the nursing home population and could have a significant impact on quality of life. As a form of long-distance consultation teledermatology offers several potential benefits within this frail population. In this review we discuss several aspects of teledermatology, especially in relation to the nursing home population. Several studies demonstrated that teledermatology is a cost-effective and easy-to-use consultation method, which could significantly reduce the amount of hospital visits. However, teledermatology is only used in a limited number of Dutch nursing homes in daily practice due to several factors. For the optimal implementation of teledermatological consultation there are some important logistical, legal and financial framework conditions. In conclusion, teledermatology has a lot to offer within the nursing home population and therefore teledermatology will hopefully be increasingly used in daily practice within the near future.
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