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Hijam AC, Tongbram YC, Nongthombam PD, Meitei HN, Koijam AS, Rajashekar Y, Haobam R. Neuroprotective potential of traditionally used medicinal plants of Manipur against rotenone-induced neurotoxicity in SH-SY5Y neuroblastoma cells. JOURNAL OF ETHNOPHARMACOLOGY 2024; 330:118197. [PMID: 38636579 DOI: 10.1016/j.jep.2024.118197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 04/08/2024] [Accepted: 04/12/2024] [Indexed: 04/20/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Alternanthera sessilis (L.) R. Br. ex DC., Eryngium foetidum L., and Stephania japonica (Thunb.) Miers plants are traditionally used to treat various central nervous system disorders like paralysis, epilepsy, seizure, convulsion, chronic pain, headache, sleep disturbances, sprain, and mental disorders. However, their possible neuroprotective effects have not been evaluated experimentally so far. AIM OF THE STUDY The study aims to examine the neuroprotective potential of the three plants against cytotoxicity induced by rotenone in SH-SY5Y neuroblastoma cells and assess its plausible mechanisms of neuroprotection. MATERIALS AND METHODS The antioxidant properties of the plant extracts were determined chemically by DPPH and ABTS assay methods. The cytotoxicity of rotenone and the cytoprotective activities of the extracts were evaluated using MTT assays. Microtubule-associated protein 2 (MAP2) expression studies in cells were performed to assess neuronal survival after rotenone and extract treatments. Mitochondrial membrane potential and intracellular levels of reactive oxygen species were evaluated using Rhodamine 123 and DCF-DA dye, respectively. Catalase, glutathione peroxidase, and superoxide dismutase activities were also measured. Apoptotic nuclei were examined using DAPI staining. Liquid chromatography-quadrupole time-of-flight tandem mass spectrometry (LC-QTOF-MS) analysis of the plant extracts was also performed. RESULTS The methanol extracts of A. sessilis, S. japonica, and E. foetidum showed excellent free radical scavenging activities. MAP2 expression studies show that A. sessilis and S. japonica have higher neuroprotective effects against rotenone-induced neurotoxicity in SH-SY5Y cells than E. foetidum. Pre-treating cells with the plant extracts reverses the rotenone-induced increase in intracellular ROS. The plant extracts could also restore the reduced mitochondrial membrane potential induced by rotenone treatment and reinstate rotenone-induced increases in catalase, glutathione peroxidase, and superoxide dismutase activities. All the extracts inhibited rotenone-induced changes in nuclear morphology and DNA condensation, an early event of cellular apoptosis. LC-QTOF-MS analysis of the plant extracts shows the presence of neuroprotective compounds. CONCLUSIONS The plant extracts showed neuroprotective activities against rotenone-treated SH-SY5Y cells through antioxidant and anti-apoptotic mechanisms. These findings support the ethnopharmacological uses of these plants in treating neurological disorders. They probably are a good source of neuroprotective compounds that could be further explored to develop treatment strategies for neurodegenerative diseases like Parkinson's disease.
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Affiliation(s)
- Aruna Chanu Hijam
- Department of Biotechnology, Manipur University, Canchipur, Imphal, 795003, Manipur, India
| | | | - Pooja Devi Nongthombam
- Department of Biotechnology, Manipur University, Canchipur, Imphal, 795003, Manipur, India
| | | | - Arunkumar Singh Koijam
- Insect Bioresources Laboratory, Animal Bioresources Programme, Institute of Bioresources & Sustainable Development, Department of Biotechnology, Govt. of India, Takyelpat, Imphal, 795001, Manipur, India
| | - Yallapa Rajashekar
- Insect Bioresources Laboratory, Animal Bioresources Programme, Institute of Bioresources & Sustainable Development, Department of Biotechnology, Govt. of India, Takyelpat, Imphal, 795001, Manipur, India
| | - Reena Haobam
- Department of Biotechnology, Manipur University, Canchipur, Imphal, 795003, Manipur, India.
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Kim S, Hyun DG, Nam Y, Shin SJ, Im D, Kim HS, Leem SH, Park HH, Kim BH, Park YH, Cho E, Goddard WA, Kim DH, Kim HI, Moon M. Genipin and pyrogallol: Two natural small molecules targeting the modulation of disordered proteins in Alzheimer's disease. Biomed Pharmacother 2023; 168:115770. [PMID: 37865990 DOI: 10.1016/j.biopha.2023.115770] [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: 07/17/2023] [Revised: 10/03/2023] [Accepted: 10/18/2023] [Indexed: 10/24/2023] Open
Abstract
Alzheimer's disease (AD) is characterized by the aggregation of disordered proteins, such as amyloid beta (Aβ) and tau, leading to neurotoxicity and disease progression. Despite numerous efforts, effective inhibitors of Aβ and tau aggregates have not been developed. Thus, we aimed to screen natural small molecules from crude extracts that target various pathologies and are prescribed for patients with neurological diseases. In this study, we screened 162 natural small molecules prescribed for neurological diseases and identified genipin and pyrogallol as hit compounds capable of simultaneously regulating the aggregation of Aβ and tau K18. Moreover, we confirmed the dual modulatory effects of these compounds on the reduction of amyloid-mediated neurotoxicity in vitro and the disassembly of preformed Aβ42 and tau K18 fibrils. Furthermore, we observed the alleviatory effects of genipin and pyrogallol against AD-related pathologies in triple transgenic AD mice. Molecular dynamics and docking simulations revealed the molecular interaction dynamics of genipin and pyrogallol with Aβ42 and tau K18, providing insights into their suppression of aggregation. Our findings suggest the therapeutic potential of genipin and pyrogallol as dual modulators for the treatment of AD by inhibiting aggregation or promoting dissociation of Aβ and tau.
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Affiliation(s)
- Sujin Kim
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea; Research Institute for Dementia Science, Konyang University, Daejeon 35365, the Republic of Korea
| | - Da Gyeong Hyun
- Department of Chemistry, Korea University, Seoul 02841, the Republic of Korea; Center for Proteogenome Research, Korea University, Seoul 02841, the Republic of Korea; Single Cell Analysis Laboratory, Korea University, Seoul 02841, the Republic of Korea; Division of Chemistry and Chemical Engineering and Materials Process and Simulation Center, California Institute of Technology, Pasadena, CA 91125, United States
| | - Yunkwon Nam
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Soo Jung Shin
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Dongjoon Im
- Department of Chemistry, Korea University, Seoul 02841, the Republic of Korea; Center for Proteogenome Research, Korea University, Seoul 02841, the Republic of Korea; Single Cell Analysis Laboratory, Korea University, Seoul 02841, the Republic of Korea; Division of Chemistry and Chemical Engineering and Materials Process and Simulation Center, California Institute of Technology, Pasadena, CA 91125, United States
| | - Hyeon Soo Kim
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Seol Hwa Leem
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Hyun Ha Park
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Byeong-Hyeon Kim
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Yong Ho Park
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea
| | - Eunbi Cho
- Department of Pharmacology, School of Medicine, Konkuk University, Seoul 05029, the Republic of Korea
| | - William A Goddard
- Division of Chemistry and Chemical Engineering and Materials Process and Simulation Center, California Institute of Technology, Pasadena, CA 91125, United States
| | - Dong Hyun Kim
- Department of Pharmacology, School of Medicine, Konkuk University, Seoul 05029, the Republic of Korea.
| | - Hugh I Kim
- Department of Chemistry, Korea University, Seoul 02841, the Republic of Korea; Center for Proteogenome Research, Korea University, Seoul 02841, the Republic of Korea; Single Cell Analysis Laboratory, Korea University, Seoul 02841, the Republic of Korea; Division of Chemistry and Chemical Engineering and Materials Process and Simulation Center, California Institute of Technology, Pasadena, CA 91125, United States.
| | - Minho Moon
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, the Republic of Korea; Research Institute for Dementia Science, Konyang University, Daejeon 35365, the Republic of Korea.
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Luo L, Li D, Xu X, Jia Q, Li Z, Xu R, Chen Z, Zhao Y. Synthesis and neuroprotective effects of new genipin derivatives against glutamate-induced oxidative damage. Fitoterapia 2023; 169:105616. [PMID: 37479119 DOI: 10.1016/j.fitote.2023.105616] [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: 03/21/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/23/2023]
Abstract
Glutamate-induced oxidative stress is well-known to play a crucial role in the development of neurodegenerative diseases, such as stroke. Genipin, a natural iridoid compound, has demonstrated potential neuroprotective properties but is unstable in physiological conditions. The present study aimed to develop new derivatives of genipin that exhibit improved stability and activity for the treatment of stroke. Nineteen new derivatives were thus designed and synthesized. Their neuroprotective effect against glutamate-induced injury was evaluated in HT22 cells. Among the newly synthesized derivatives, 3e demonstrated significantly greater neuroprotection and improved stability compared to genipin. Specifically, 0.01 μM of 3e was found to effectively attenuate glutamate-induced oxidative damage by inhibiting ROS over-accumulation, reducing MDA content, and restoring the endogenous antioxidative system. Further investigation revealed that 3e inhibited oxidative stress by downregulating the phosphorylation levels of p38 MAPK and activating Nrf2 and HO-1 proteins. These results suggested that 3e has the potential to serve as a promising candidate for the treatment of stroke by protecting against glutamate-induced oxidative stress.
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Affiliation(s)
- Liping Luo
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Dehuai Li
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiaojia Xu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Qi Jia
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhiyin Li
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Ruilong Xu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhenyu Chen
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yu Zhao
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China.
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Maronpot RR, Streicker M, Mahapatra D, Moore R, Koyanagi M, Chiba S, Nishino M, Hayashi SM. Twelve-month in utero safety assessment of gardenia blue, a natural food colorant. J Toxicol Pathol 2023; 36:171-179. [PMID: 37577364 PMCID: PMC10412961 DOI: 10.1293/tox.2023-0030] [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: 02/18/2023] [Accepted: 03/22/2023] [Indexed: 08/15/2023] Open
Abstract
Toxicity assessment of the food colorant Gardenia jasminoides Ellis at dietary exposures of 0.0%, 0.1%, 0.5%, 1.5%, 3.0% and 5.0% included measures of T-cell- dependent antibody response, neurotoxicity, and clinical and anatomic pathology in Sprague Dawley rats during mating, gestation, lactation, postnatal development, and following weaning for up to 12 months including 3- and 6-month interim evaluations. Blue coloration of the gastrointestinal tract, mesenteric lymph nodes and kidneys was present in treated rats only at necropsy with minimal blue coloration at the lowest dose and without histopathological correlates in any of the tissues. There was good survival with no consistent treatment-related changes in hematology, clinical chemistry, enhanced evaluation of lymphoid tissues, or tissue histopathology at interim and final time points. T-cell dependent antibody response and neurotoxicity screening were negative in treated rats. The no-observed-adverse-effect level (NOAEL) was determined to be 5.0% gardenia blue (2,854.5 and 3,465.4 mg/kg/day in parental males and females, respectively, prior to mating; 3,113.5 and 4,049.6 mg/kg/day in male and female offspring, respectively, following up to 12 months of exposure.
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Affiliation(s)
- Robert R. Maronpot
- Maronpot Consulting, 1612 Medfield Road, Raleigh, North
Carolina, 27607 USA
| | - Michael Streicker
- Inotiv, PO Box 13501, Research Triangle Park, North
Carolina, 27709 USA
| | | | - Rebecca Moore
- Inotiv, PO Box 13501, Research Triangle Park, North
Carolina, 27709 USA
| | - Mihoko Koyanagi
- San-Ei Gen F. F. I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka
561-8588, Japan
| | - Shuichi Chiba
- San-Ei Gen F. F. I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka
561-8588, Japan
| | - Masayuki Nishino
- San-Ei Gen F. F. I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka
561-8588, Japan
| | - Shim-mo Hayashi
- Tokyo University of Agriculture and Technology, 3-5-8
Saiwaicho, Fuchu-shi, Tokyo 183-8509, Japan
- National Institute of Health Sciences, 3-25-26 Tonomachi,
Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
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Khan SA, Akhtar MJ, Gogoi U, Meenakshi DU, Das A. An Overview of 1,2,3-triazole-Containing Hybrids and Their Potential Anticholinesterase Activities. Pharmaceuticals (Basel) 2023; 16:179. [PMID: 37259329 PMCID: PMC9961747 DOI: 10.3390/ph16020179] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/18/2023] [Accepted: 01/22/2023] [Indexed: 07/30/2023] Open
Abstract
Acetylcholine (ACh) neurotransmitter of the cholinergic system in the brain is involved in learning, memory, stress responses, and cognitive functioning. It is hydrolyzed into choline and acetic acid by two key cholinesterase enzymes, viz., acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). A loss or degeneration of cholinergic neurons that leads to a reduction in ACh levels is considered a significant contributing factor in the development of neurodegenerative diseases (NDs) such as Alzheimer's disease (AD). Numerous studies have shown that cholinesterase inhibitors can raise the level of ACh and, therefore, enhance people's quality of life, and, at the very least, it can temporarily lessen the symptoms of NDs. 1,2,3-triazole, a five-membered heterocyclic ring, is a privileged moiety, that is, a central scaffold, and is capable of interacting with a variety of receptors and enzymes to exhibit a broad range of important biological activities. Recently, it has been clubbed with other pharmacophoric fragments/molecules in hope of obtaining potent and selective AChE and/or BuChE inhibitors. The present updated review succinctly summarizes the different synthetic strategies used to synthesize the 1,2,3-triazole moiety. It also highlights the anticholinesterase potential of various 1,2,3-triazole di/trihybrids reported in the past seven years (2015-2022), including a rationale for hybridization and with an emphasis on their structural features for the development and optimization of cholinesterase inhibitors to treat NDs.
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Affiliation(s)
- Shah Alam Khan
- College of Pharmacy, National University of Science and Technology, Muscat 130, Oman
| | | | - Urvashee Gogoi
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh 786004, India
| | | | - Aparoop Das
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh 786004, India
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6
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Silalai P, Jaipea S, Tocharus J, Athipornchai A, Suksamrarn A, Saeeng R. New 1,2,3-Triazole-genipin Analogues and Their Anti-Alzheimer's Activity. ACS OMEGA 2022; 7:24302-24316. [PMID: 35874205 PMCID: PMC9301951 DOI: 10.1021/acsomega.2c01593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A novel series of 1,2,3-triazole-genipin analogues were designed, synthesized, and evaluated for neuroprotective activity, acetylcholinesterase (AChE), and butyrylcholinesterase (BuChE) inhibitory activity. The genipin analogues bearing bromoethyl- and diphenylhydroxy-triazole showed in vitro neuroprotective properties against H2O2 toxicity along with potent inhibitory activity on BuChE with IC50 values of 31.77 and 54.33 μM, respectively, compared with galantamine (IC50 = 34.05 μM). The molecular docking studies of these genipin analogues showed good binding energy and interact well with the key amino acids of BuChE via hydrogen-bonding and hydrophobic interactions. Triazole genipins might be promising lead compounds as anti-Alzheimer's agents.
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Affiliation(s)
- Patamawadee Silalai
- Department
of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
| | - Suwichada Jaipea
- Department
of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
| | - Jiraporn Tocharus
- Department
of Physiology, Faculty of Medicine, Chiang
Mai University, Chiang
Mai 50200, Thailand
| | - Anan Athipornchai
- Department
of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
| | - Apichart Suksamrarn
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
| | - Rungnapha Saeeng
- Department
of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
- The
Research Unit in Synthetic Compounds and Synthetic Analogues from
Natural Product for Drug Discovery (RSND), Burapha University, Chonburi 20131, Thailand
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Piccialli I, Tedeschi V, Caputo L, D’Errico S, Ciccone R, De Feo V, Secondo A, Pannaccione A. Exploring the Therapeutic Potential of Phytochemicals in Alzheimer’s Disease: Focus on Polyphenols and Monoterpenes. Front Pharmacol 2022; 13:876614. [PMID: 35600880 PMCID: PMC9114803 DOI: 10.3389/fphar.2022.876614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/11/2022] [Indexed: 12/21/2022] Open
Abstract
Alzheimer’s disease (AD) is a chronic, complex neurodegenerative disorder mainly characterized by the irreversible loss of memory and cognitive functions. Different hypotheses have been proposed thus far to explain the etiology of this devastating disorder, including those centered on the Amyloid-β (Aβ) peptide aggregation, Tau hyperphosphorylation, neuroinflammation and oxidative stress. Nonetheless, the therapeutic strategies conceived thus far to treat AD neurodegeneration have proven unsuccessful, probably due to the use of single-target drugs unable to arrest the progressive deterioration of brain functions. For this reason, the theoretical description of the AD etiology has recently switched from over-emphasizing a single deleterious process to considering AD neurodegeneration as the result of different pathogenic mechanisms and their interplay. Moreover, much relevance has recently been conferred to several comorbidities inducing insulin resistance and brain energy hypometabolism, including diabetes and obesity. As consequence, much interest is currently accorded in AD treatment to a multi-target approach interfering with different pathways at the same time, and to life-style interventions aimed at preventing the modifiable risk-factors strictly associated with aging. In this context, phytochemical compounds are emerging as an enormous source to draw on in the search for multi-target agents completing or assisting the traditional pharmacological medicine. Intriguingly, many plant-derived compounds have proven their efficacy in counteracting several pathogenic processes such as the Aβ aggregation, neuroinflammation, oxidative stress and insulin resistance. Many strategies have also been conceived to overcome the limitations of some promising phytochemicals related to their poor pharmacokinetic profiles, including nanotechnology and synthetic routes. Considering the emerging therapeutic potential of natural medicine, the aim of the present review is therefore to highlight the most promising phytochemical compounds belonging to two major classes, polyphenols and monoterpenes, and to report the main findings about their mechanisms of action relating to the AD pathogenesis.
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Affiliation(s)
- Ilaria Piccialli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, University of Naples “Federico II”, Naples, Italy
| | - Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, University of Naples “Federico II”, Naples, Italy
| | - Lucia Caputo
- Department of Pharmacy, University of Salerno, Salerno, Italy
| | - Stefano D’Errico
- Department of Pharmacy, University of Naples “Federico II”, Naples, Italy
| | - Roselia Ciccone
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, University of Naples “Federico II”, Naples, Italy
| | - Vincenzo De Feo
- Department of Pharmacy, University of Salerno, Salerno, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, University of Naples “Federico II”, Naples, Italy
| | - Anna Pannaccione
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, University of Naples “Federico II”, Naples, Italy
- *Correspondence: Anna Pannaccione,
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Microemulsion Delivery System Improves Cellular Uptake of Genipin and Its Protective Effect against Aβ1-42-Induced PC12 Cell Cytotoxicity. Pharmaceutics 2022; 14:pharmaceutics14030617. [PMID: 35335992 PMCID: PMC8950416 DOI: 10.3390/pharmaceutics14030617] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 02/04/2023] Open
Abstract
Genipin has attracted much attention for its hepatoprotective, anti-inflammatory, and neuroprotection activities. However, poor water solubility and active chemical properties limit its application in food and pharmaceutical industries. This article aimed to develop a lipid-based microemulsion delivery system to improve the stability and bioavailability of genipin. The excipients for a genipin microemulsion (GME) preparation were screened and a pseudo-ternary phase diagram was established. The droplet size (DS), zeta potential (ZP), polydispersity index (PDI), physical and simulated gastrointestinal digestion stability, and in vitro drug release properties were characterized. Finally, the effect of the microemulsion on its cellular uptake by Caco-2 cells and the protective effect on PC12 cells were investigated. The prepared GME had a transparent appearance with a DS of 16.17 ± 0.27 nm, ZP of −8.11 ± 0.77 mV, and PDI of 0.183 ± 0.013. It exhibited good temperature, pH, ionic strength, and simulated gastrointestinal digestion stability. The in vitro release and cellular uptake data showed that the GME had a lower release rate and better bioavailability compared with that of free genipin. Interestingly, the GME showed a significantly better protective effect against amyloid-β (Aβ1-42)-induced PC12 cell cytotoxicity than that of the unencapsulated genipin. These findings suggest that the lipid-based microemulsion delivery system could serve as a promising approach to improve the application of genipin.
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Wojtunik-Kulesza K, Rudkowska M, Kasprzak-Drozd K, Oniszczuk A, Borowicz-Reutt K. Activity of Selected Group of Monoterpenes in Alzheimer's Disease Symptoms in Experimental Model Studies-A Non-Systematic Review. Int J Mol Sci 2021; 22:7366. [PMID: 34298986 PMCID: PMC8306454 DOI: 10.3390/ijms22147366] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 12/19/2022] Open
Abstract
Alzheimer's disease (AD) is the leading cause of dementia and cognitive function impairment. The multi-faced character of AD requires new drug solutions based on substances that incorporate a wide range of activities. Antioxidants, AChE/BChE inhibitors, BACE1, or anti-amyloid platelet aggregation substances are most desirable because they improve cognition with minimal side effects. Plant secondary metabolites, used in traditional medicine and pharmacy, are promising. Among these are the monoterpenes-low-molecular compounds with anti-inflammatory, antioxidant, enzyme inhibitory, analgesic, sedative, as well as other biological properties. The presented review focuses on the pathophysiology of AD and a selected group of anti-neurodegenerative monoterpenes and monoterpenoids for which possible mechanisms of action have been explained. The main body of the article focuses on monoterpenes that have shown improved memory and learning, anxiolytic and sleep-regulating effects as determined by in vitro and in silico tests-followed by validation in in vivo models.
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Affiliation(s)
| | - Monika Rudkowska
- Independent Experimental Neuropathophysiology Unit, Medical University of Lublin, Jaczewskiego 8b, 20-090 Lublin, Poland; (M.R.); (K.B.-R.)
| | - Kamila Kasprzak-Drozd
- Department of Inorganic Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland;
| | - Anna Oniszczuk
- Department of Inorganic Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland;
| | - Kinga Borowicz-Reutt
- Independent Experimental Neuropathophysiology Unit, Medical University of Lublin, Jaczewskiego 8b, 20-090 Lublin, Poland; (M.R.); (K.B.-R.)
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Gupta AK, Roy S, Das PK. Antileishmanial effect of the natural immunomodulator genipin through suppression of host negative regulatory protein UCP2. J Antimicrob Chemother 2021; 76:135-145. [PMID: 32995849 DOI: 10.1093/jac/dkaa406] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 09/01/2020] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVES To evaluate the antileishmanial efficacy of genipin, which specifically inhibits uncoupling protein 2 (UCP2) that is induced in leishmaniasis to neutralize reactive oxygen species (ROS). METHODS The effect of genipin was assessed against intracellular parasites in cultured macrophages and in suppressing spleen and liver parasite burdens in a BALB/c mouse model of visceral leishmaniasis by microscopic evaluation of intracellular amastigotes stained with Giemsa. ROS and mitochondrial membrane potential were measured by H2DCFDA- and JC-1-based fluorometric analysis. ELISA was performed for various Th1 and Th2 cytokines in both in vitro and in vivo infected conditions to evaluate the type of immunological responses. The role of UCP2 was assessed by lipofectamine-mediated transfection and overexpression in macrophages and short hairpin RNA-mediated knockdown of UCP2 in infected animals. RESULTS Genipin reduced the infection-induced UCP2 levels in macrophages, with optimum effect at 100 μM. Genipin reversed parasite-induced ROS suppression and mitochondrial membrane potential disruption. It has no inhibitory effect on promastigote or axenic amastigote forms, but markedly suppressed amastigote multiplication within macrophages, which was reversed by the ROS scavenger N-acetyl cysteine. Genipin administration (30 mg/kg/day) in infected mice showed significant suppression of liver and spleen parasite burdens with an enhanced host-favourable cytokine balance in a ROS-p38 mitogen-activated protein kinase-dependent manner. Co-treatment with genipin plus a sublethal dose of sodium antimony gluconate (SAG50) showed almost a curative reduction in spleen and liver parasite burden. CONCLUSIONS These results suggest the effectiveness of genipin as a synergistic agent for the front-line antileishmanial drug SAG in circumventing the resistance and toxicity problems associated with its high curative dose.
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Affiliation(s)
- Anand Kumar Gupta
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
| | - Shalini Roy
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
| | - Pijush K Das
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
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Genipin Attenuates Tau Phosphorylation and Aβ Levels in Cellular Models of Alzheimer's Disease. Mol Neurobiol 2021; 58:4134-4144. [PMID: 33948899 DOI: 10.1007/s12035-021-02389-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/05/2021] [Indexed: 10/21/2022]
Abstract
Alzheimer's disease (AD) is a devastating brain disorder characterized by neurofibrillary tangles and amyloid plaques. Inhibiting Tau protein and amyloid-beta (Aβ) production or removing these molecules is considered potential therapeutic strategies for AD. Genipin is an aglycone and is isolated from the extract of Gardenia jasminoides Ellis fruit. In this study, the effect and molecular mechanisms of genipin on the inhibition of Tau aggregation and Aβ generation were investigated. The results showed that genipin bound to Tau and protected against heparin-induced Tau fibril formation. Moreover, genipin suppressed Tau phosphorylation probably by downregulating the expression of CDK5 and GSK-3β, and activated mTOR-dependent autophagy via the SIRT1/LKB1/AMPK signaling pathway in Tau-overexpressing cells. In addition, genipin decreased Aβ production by inhibiting BACE1 expression through the PERK/eIF2α signaling pathway in N2a/SweAPP cells. These data indicated that genipin could effectively lead to a significant reduction of phosphorylated Tau level and Aβ generation in vitro, suggesting that genipin might be developed into an effective therapeutic complement or a potential nutraceutical for preventing AD.
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12
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Li W, Ren C, Fei C, Wang Y, Xue Q, Li L, Yin F, Li W. Analysis of the chemical composition changes of Gardeniae Fructus before and after processing based on ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry. J Sep Sci 2021; 44:981-991. [PMID: 33351278 DOI: 10.1002/jssc.202000957] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/22/2020] [Accepted: 12/18/2020] [Indexed: 01/24/2023]
Abstract
Gardeniae Fructus, the dry fruit of Gardenia jasminoides Ellis, has been widely used for the treatment of different diseases. Although four types of processed Gardeniae Fructus products, characterized by differing effects, are available for clinical use, little is known regarding the respective processing mechanisms. In this study, ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry combined with multivariate statistical analysis was applied to characterize the chemical profiles of the differently processed Gardeniae Fructus products and to determine differences in their chemical compositions, thereby enabling us to identify those active compounds associated with the observed clinical effects. A total of 125 compounds were accordingly identified, among which, 56 were established as primary contributors to the significant differences (P < 0.01) between crude and processed Gardeniae Fructus, based on t-test analysis. Furthermore, the potential mechanisms underlying the chemical transformations that occurred during processing were discussed. The findings of this study may not only contribute to the more effective quality control of Gardeniae Fructus but also provide basic information for elucidating the mechanisms underlying the changes in chemical constituents in response to processing, and provide a basis for further investigations of Gardeniae Fructus processing mechanisms.
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Affiliation(s)
- Wenjing Li
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Chenchen Ren
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Chenghao Fei
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Yulin Wang
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Qianqian Xue
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Lin Li
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China.,The Key Research Laboratory of Chinese Medicine Processing of Jiangsu Province, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Fangzhou Yin
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China.,The Key Research Laboratory of Chinese Medicine Processing of Jiangsu Province, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Weidong Li
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China.,The Key Research Laboratory of Chinese Medicine Processing of Jiangsu Province, Nanjing University of Chinese Medicine, Nanjing, P. R. China
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13
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Silalai P, Sirion U, Piyachaturawat P, Chairoungdua A, Suksen K, Saeeng R. Design, Synthesis and Evaluations of New 10‐Triazolyl‐1‐methoxygenipin Analogues for Their Cytotoxicity to Cancer Cells. ChemistrySelect 2020. [DOI: 10.1002/slct.202001908] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Patamawadee Silalai
- Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science Burapha University, The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery (RSND), Longhaad Bangsaen Rd. Chonburi 20131 Thailand
| | - Uthaiwan Sirion
- Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science Burapha University, The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery (RSND), Longhaad Bangsaen Rd. Chonburi 20131 Thailand
| | | | - Arthit Chairoungdua
- Department of Physiology Faculty of Science Mahidol University Bangkok 10400 Thailand
| | - Kanoknetr Suksen
- Department of Physiology Faculty of Science Mahidol University Bangkok 10400 Thailand
| | - Rungnapha Saeeng
- Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science Burapha University, The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery (RSND), Longhaad Bangsaen Rd. Chonburi 20131 Thailand
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14
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Karimi E, Abbasi S, Abbasi N. Thymol polymeric nanoparticle synthesis and its effects on the toxicity of high glucose on OEC cells: involvement of growth factors and integrin-linked kinase. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:2513-2532. [PMID: 31440034 PMCID: PMC6664260 DOI: 10.2147/dddt.s214454] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 07/03/2019] [Indexed: 11/25/2022]
Abstract
Background Nowadays, the drug delivery system is important in the treatment of diseases. Purpose A polymeric nanoparticle modified by oleic acid (NPMO) as a Thymol (Thy) drug release system was synthesized from Thymbra spicata and its neurotrophic and angiogenic effects on rat’s olfactory ensheathing cells (OECs) in normal (NG) and high glucose (HG) conditions were studied. Methods The NPMO was characterized by using different spectroscopy methods, such as infrared, HNMR, CNMR, gel permeation chromatography, dynamic light scattering, and atomic force microscopy. Load and releasing were investigated by HPLC. The toxicity against OECs diet-induced by MTT assay. ROS and generation of nitric oxide (NO) were evaluated using dichloro-dihydro-fluorescein and Griess method, respectively. The expression of protein integrin-linked kinase (ILK), vascular endothelial growth factor (VEGF), brain-derived neurotrophic factor (BDNF), and nerve growth factor (NGF) were evaluated by Western blotting. Results ThyNPMO is desirable for transferring drug as a carrier. The amount of Thy and extract (E) loaded on NPMO estimated at 43±2.5% and 41±1.8%, respectively. Then, 65% and 63% of the drug load were released, respectively. Thy, ThyNPMO, E, and ENPMO prevented HG-induced OECs cell death (EC50 33±1.5, 22±0.9, 35±1.8, and 25±1.1 μM, respectively). Incubation with Thy, ThyNPMO, E ,and ENPMO at high concentrations increased cell death with LC50 105±3.5, 82±2.8, 109±4.3, and 86±3.4 μM, respectively in HG states. Conclusion OECs were protected by ThyNPMO and ENPMO in protective concentrations by reducing the amount of ROS and NO, maintaining ILK, reducing VEGF, and increasing BDNF and NGF. The mentioned mechanisms were totally reversed at high concentrations.
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Affiliation(s)
- Elahe Karimi
- Department of Chemistry, Ilam Branch, Islamic Azad University, Ilam, Iran.,Biotechnology and Medicinal Plants Research Center, Ilam University of Medical Sciences, Ilam, Iran
| | - Shahryar Abbasi
- Department of Chemistry, Ilam Branch, Islamic Azad University, Ilam, Iran.,Department of Chemistry, Faculty of Science, Ilam University, Ilam, Iran
| | - Naser Abbasi
- Biotechnology and Medicinal Plants Research Center, Ilam University of Medical Sciences, Ilam, Iran.,Department of Pharmacology, Medical School, Ilam University of Medical Sciences, Ilam, Iran
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15
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Zhang Z, Wang Y, Zhang Y, Li J, Huang W, Wang L. The synthesis and biological evaluation of novel gardenamide A derivatives as multifunctional neuroprotective agents. MEDCHEMCOMM 2019; 10:1180-1186. [PMID: 31391892 PMCID: PMC6640559 DOI: 10.1039/c9md00211a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 05/22/2019] [Indexed: 01/30/2023]
Abstract
A novel series of gardenamide A derivatives was synthesized as potential anti-Alzheimer's disease agents. The neuroprotective effects of these multifunctional agents against oxygen-glucose deprivation (OGD)-induced neurotoxicity in rat cortical neurons, and hydrogen peroxide (H2O2)- and amyloid-β1-42 (Aβ1-42)-induced neurotoxicity in rat hippocampal neurons were evaluated. In vitro studies revealed that these compounds demonstrated moderate to good multifunctional neuroprotective activity. Among the entire series, compounds 10e, 10j, 10n and 10p appeared to be the most active multifunctional neuroprotective agents. Studies indicate that compounds 10e, 10f, 10h, 10i, 10j, 10n and 10p exhibit significant activities against OGD-induced neurotoxicity in rat cortical neurons, and 10e, 10j, 10n and 10p show prominent activities against H2O2- and Aβ1-42-induced neurotoxicity in rat hippocampal neurons. Moreover, these derivatives did not exert conspicuous neurotoxicity in rat cortical neurons. Thus, the present study evidently shows that 10e, 10j, 10n and 10p are potent multifunctional neuroprotective agents, which may serve as promising lead candidates for anti-Alzheimer's disease drug development.
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Affiliation(s)
- Zuzhi Zhang
- Department of Medicinal Chemistry , Anhui University of Chinese Medicine , 103 Meishan Road , Hefei 230031 , PR China .
- Anhui Province Key Laboratory of Chinese Medicinal Formula , Hefei , Anhui 230012 , China .
| | - Yujun Wang
- Department of Medicinal Chemistry , Anhui University of Chinese Medicine , 103 Meishan Road , Hefei 230031 , PR China .
| | - Yanchun Zhang
- Department of Medicinal Chemistry , Anhui University of Chinese Medicine , 103 Meishan Road , Hefei 230031 , PR China .
- Anhui Province Key Laboratory of Chinese Medicinal Formula , Hefei , Anhui 230012 , China .
| | - Jiaming Li
- Department of Medicinal Chemistry , Anhui University of Chinese Medicine , 103 Meishan Road , Hefei 230031 , PR China .
- Anhui Province Key Laboratory of Chinese Medicinal Formula , Hefei , Anhui 230012 , China .
| | - Weijun Huang
- Department of Medicinal Chemistry , Anhui University of Chinese Medicine , 103 Meishan Road , Hefei 230031 , PR China .
| | - Lei Wang
- Department of Medicinal Chemistry , Anhui University of Chinese Medicine , 103 Meishan Road , Hefei 230031 , PR China .
- Anhui Province Key Laboratory of Chinese Medicinal Formula , Hefei , Anhui 230012 , China .
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16
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Hobbs CA, Koyanagi M, Swartz C, Davis J, Maronpot R, Recio L, Hayashi SM. Genotoxicity evaluation of the naturally-derived food colorant, gardenia blue, and its precursor, genipin. Food Chem Toxicol 2018; 118:695-708. [DOI: 10.1016/j.fct.2018.06.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/16/2022]
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17
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Habtemariam S. Iridoids and Other Monoterpenes in the Alzheimer's Brain: Recent Development and Future Prospects. Molecules 2018; 23:molecules23010117. [PMID: 29316661 PMCID: PMC6017424 DOI: 10.3390/molecules23010117] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 01/04/2018] [Accepted: 01/05/2018] [Indexed: 12/14/2022] Open
Abstract
Iridoids are a class of monoterpenoid compounds constructed from 10-carbon skeleton of isoprene building units. These compounds in their aglycones and glycosylated forms exist in nature to contribute to mechanisms related to plant defenses and diverse plant-animal interactions. Recent studies have also shown that iridoids and other structurally related monoterpenes display a vast array of pharmacological effects that make them potential modulators of the Alzheimer’s disease (AD). This review critically evaluates the therapeutic potential of these natural products by assessing key in vitro and in vivo data published in the scientific literature. Mechanistic approach of scrutiny addressing their effects in the Alzheimer’s brain including the τ-protein phosphorylation signaling, amyloid beta (Aβ) formation, aggregation, toxicity and clearance along with various effects from antioxidant to antiinflammatory mechanisms are discussed. The drug likeness of these compounds and future prospects to consider in their development as potential leads are addressed.
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Affiliation(s)
- Solomon Habtemariam
- Pharmacognosy Research Laboratories & Herbal Analysis Services, University of Greenwich, Central Avenue, Chatham-Maritime, Kent ME4 4TB, UK.
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18
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Abstract
Central neurodegenerative diseases, such as Alzheimer's disease (AD) and Parkinson's disease (PD), are one of the biggest health problems worldwide. Currently, there is no cure for these diseases. The Gardenia jasminoides fruit is a common herbal medicine in traditional Chinese medicine (TCM), and a variety of preparations are used as treatments for central nervous system (CNS) diseases. Pharmacokinetic studies suggest genipin is one of the main effective ingredients of G. jasminoides fruit extract (GFE). Accumulated research data show that genipin possesses a range of key pharmacological properties, such as anti-inflammatory, neuroprotective, neurogenic, antidiabetic, and antidepressant effects. Thus, genipin shows therapeutic potential for central neurodegenerative diseases. We review the pharmacological actions of genipin for the treatment of neurodegenerative diseases of the CNS. We also describe the potential mechanisms underlying these effects.
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19
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Liu W, Li G, Hölscher C, Li L. Neuroprotective effects of geniposide on Alzheimer's disease pathology. Rev Neurosci 2015; 26:371-83. [PMID: 25879319 DOI: 10.1515/revneuro-2015-0005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 02/25/2015] [Indexed: 12/20/2022]
Abstract
A growing body of evidence has linked two of the most common aged-related diseases: type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD). It has led to the notion that drugs developed for the treatment of T2DM may be beneficial in modifying the pathophysiology of AD. As a receptor agonist of glucagon-like peptide-1 (GLP-1R), which is a newer drug class to treat T2DM, geniposide shows clear effects in inhibiting pathological processes underlying AD, such as promoting neurite outgrowth. In the present article, we review the possible molecular mechanisms of geniposide to protect the brain from pathologic damages underlying AD: reducing amyloid plaques, inhibiting τ phosphorylation, preventing memory impairment and loss of synapses, reducing oxidative stress and the chronic inflammatory response, and promoting neurite outgrowth via the GLP-1R signaling pathway. In summary, the Chinese herb geniposide shows great promise as a novel treatment for AD.
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20
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Wang Y, Liu H, Shen L, Yao L, Ma Y, Yu D, Chen J, Li P, Chen Y, Zhang C. Isolation and purification of six iridoid glycosides fromgardenia jasminoidesfruit by medium-pressure liquid chromatography combined with macroporous resin chromatography. J Sep Sci 2015; 38:4119-26. [DOI: 10.1002/jssc.201500705] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 09/18/2015] [Accepted: 09/25/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Yun Wang
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
- School of Life Science; Beijing Institute of Technology; Beijing China
| | - Hui Liu
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
| | - Lifeng Shen
- Capital Medical University School of TCM; Beijing China
| | - Lan Yao
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
| | - Yinlian Ma
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
| | - Dingrong Yu
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
| | - Jianhong Chen
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
- School of Pharmacy; Henan University of TCM; Zhengzhou China
| | - Puling Li
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
- School of Pharmacy; Henan University of TCM; Zhengzhou China
| | - Ying Chen
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
| | - Cun Zhang
- Institute of Chinese Materia Medica; China Academy of Chinese Medical Sciences; Beijing China
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21
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Li L, Guo Y, Zhao L, Zu Y, Gu H, Yang L. Enzymatic Hydrolysis and Simultaneous Extraction for Preparation of Genipin from Bark of Eucommia ulmoides after Ultrasound, Microwave Pretreatment. Molecules 2015; 20:18717-31. [PMID: 26501242 PMCID: PMC6332333 DOI: 10.3390/molecules201018717] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 09/22/2015] [Accepted: 10/12/2015] [Indexed: 11/16/2022] Open
Abstract
A continuous process based on the combination of ultrasounds and/or microwaves pretreatments followed by enzymatic hydrolysis and simultaneous extraction (EHSE) has been proposed to recover genipin from Eucommia ulmoides bark. At first, in the pretreatment step, the mixture of 1.0 g dried bark powder and 10 mL deionized water were irradiated by microwave under 500 W for 10 min. Then, in hydrolysis step, the optimal conditions were as follows: 0.5 mg/mL of cellulase concentration, 4.0 pH of enzyme solution, 24 h of incubation time and 40 °C of incubation temperature. After incubation, 10 mL ethanol was added to extract genipin for 30 min by ultrasound. After EHSE treatment, the yield of genipin could reach 1.71 μmol/g. Moreover, scanning electron micrographs illustrated that severe structural disruption of plant was obtained by EHSE. The results indicated that the EHSE method provided a good alternative for the preparation of genipin from Eucommia ulmoides bark as well as other herbs.
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Affiliation(s)
- Lili Li
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- State Engineering Laboratory for Bioresource Eco-Utilization, Northeast Forestry University, Harbin 150040, China.
| | - Yupin Guo
- College of Animal Science and Technology, Hebei North University, Zhangjiakou 075000, China.
| | - Lianfei Zhao
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- State Engineering Laboratory for Bioresource Eco-Utilization, Northeast Forestry University, Harbin 150040, China.
| | - Yuangang Zu
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- State Engineering Laboratory for Bioresource Eco-Utilization, Northeast Forestry University, Harbin 150040, China.
| | - Huiyan Gu
- School of Forestry, Northeast Forestry University, Harbin 150040, China.
| | - Lei Yang
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- State Engineering Laboratory for Bioresource Eco-Utilization, Northeast Forestry University, Harbin 150040, China.
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22
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Delmar K, Bianco-Peled H. The dramatic effect of small pH changes on the properties of chitosan hydrogels crosslinked with genipin. Carbohydr Polym 2015; 127:28-37. [DOI: 10.1016/j.carbpol.2015.03.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 03/01/2015] [Accepted: 03/02/2015] [Indexed: 10/23/2022]
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23
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Beukes N, Levendal RA, Frost CL. Selected terpenoids from medicinal plants modulate endoplasmic reticulum stress in metabolic disorders. J Pharm Pharmacol 2014; 66:1505-25. [DOI: 10.1111/jphp.12267] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 03/16/2014] [Indexed: 12/20/2022]
Abstract
Abstract
Objectives
The majority of research performed on cellular stress and apoptosis focuses on mitochondrial dysfunction; however, the importance of the endoplasmic reticulum dysfunction and the link to metabolic diseases has gained a substantial interest. This review focuses on the potential of terpenoids to influence endoplasmic reticulum stress and the possible role terpenoids play as the treatment of metabolic diseases.
Key findings
Metabolic diseases develop as a result of a cascade of cellular pathways. In most cases, cells are able to compensate for the disruption of the cellular homeostasis although the initiation of response pathways; however, chronic stress initiates apoptotic pathways. This reviewed (1) showed the importance of phytoterpenoids to influence endoplasmic reticulum (ER) stress and homeostasis, (2) showed how regulating ER stress affect the cell survival and death, and (3) highlighted some examples of how the progression of metabolic diseases can be influenced by ER.
Summary
Due to the substantial number of terpenoids that have been identified in literature, this review gave examples of 21 terpenoids that have been documented to have an effect on the different proteins associated with ER stress, how these plant terpenoids influence ER dysfunction and metabolic diseases such as diabetes, cancer, liver, and neurological diseases and parasitic infections.
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Affiliation(s)
- Natasha Beukes
- Department of Biochemistry and Microbiology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
| | - Ruby-Ann Levendal
- Department of Biochemistry and Microbiology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
| | - Carminita L Frost
- Department of Biochemistry and Microbiology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
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Wang R, Yang J, Liao S, Xiao G, Luo J, Zhang L, Little PJ, Chen H, Zheng W. Stereoselective Reduction of 1-O-Isopropyloxygenipin Enhances Its Neuroprotective Activity in Neuronal Cells from Apoptosis Induced by Sodium Nitroprusside. ChemMedChem 2014; 9:1397-401. [DOI: 10.1002/cmdc.201400051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Indexed: 02/06/2023]
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Aqueous extract of Gardenia jasminoides targeting oxidative stress to reduce polyQ aggregation in cell models of spinocerebellar ataxia 3. Neuropharmacology 2014; 81:166-75. [PMID: 24486383 DOI: 10.1016/j.neuropharm.2014.01.032] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 01/18/2014] [Accepted: 01/21/2014] [Indexed: 12/20/2022]
Abstract
Spinocerebellar ataxias (SCAs), caused by expanded CAG repeats encoding a long polyglutamine (polyQ) tract in the respective proteins, are characterized by the accumulation of intranuclear and cytoplasmic misfolded polyQ aggregation that leads to cell death. Suppression of aggregate formation can inhibit a wide range of downstream pathogenic events and is expected to be a therapeutic strategy for SCAs. Here we show the anti-aggregation potential of Gardenia jasminoides (G. jasminoides) and its components/metabolite geniposide, crocin, and genipin, in ATXN3/Q75-GFP 293 cells, a putative SCA3 cell model. We found the aggregation can be significantly prohibited by G. jasminoides, genipin, geniposide and crocin. Meanwhile, G. jasminoides, genipin, geniposide, and crocin up-regulated anti-oxidative markers NFE2L2, NQO1, GCLC and GSTP1, and reduced the production of reactive oxidative species (ROS) in the same cell models. All of them further inhibited the aggregation in neurally differentiated SH-SY5Y ATXN3/Q75-GFP cells. Our results demonstrate that G. jasminoides, genipin, geniposide and crocin work on polyQ-aggregation reduction by suppressing ROS. These findings indicate the therapeutic applications of G. jasminoides in treating SCAs. Furthermore, oxidative stress inhibition could be a good target for drug development of anti-polyQ aggregation.
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26
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Hughes RH, Silva VA, Ahmed I, Shreiber DI, Morrison B. Neuroprotection by genipin against reactive oxygen and reactive nitrogen species-mediated injury in organotypic hippocampal slice cultures. Brain Res 2013; 1543:308-14. [PMID: 24275198 DOI: 10.1016/j.brainres.2013.11.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 11/08/2013] [Accepted: 11/16/2013] [Indexed: 12/01/2022]
Abstract
Genipin, the multipotent ingredient in Gardenia jasmenoides fruit extract (GFE), may be an effective candidate for treatment following stroke or traumatic brain injury (TBI). Secondary injury includes damage mediated by reactive oxygen species (ROS) and reactive nitrogen species (RNS), which can alter the biological function of key cellular structures and eventually lead to cell death. In this work, we studied the neuroprotective potential of genipin against damage stemming from ROS and RNS production in organotypic hippocampal slice cultures (OHSC), as well as its potential as a direct free radical scavenger. A 50 µM dose of genipin provided significant protection against tert-butyl hydroperoxide (tBHP), a damaging organic peroxide. This dosage of genipin significantly reduced cell death at 48 h compared to vehicle control (0.1% DMSO) when administered 0, 1, 6, and 24 h after addition of tBHP. Similarly, genipin significantly reduced cell death at 48 h when administered 0, 1, 2, and 6h after addition of rotenone, which generates reactive oxygen species via a more physiologically relevant mechanism. Furthermore, genipin significantly reduced both cell death and nitrite levels at 24 h caused by S-nitroso-N-acetylpenicillamine (SNAP), a direct nitric oxide (NO) donor, and successfully quenched 1,1-Diphenyl-2-picryl-hydrazyl (DPPH), a stable free radical, suggesting that genipin may act as a direct free radical scavenger. Our encouraging findings suggest that genipin should be tested in animal models of CNS injury with a significant component of ROS- and RNS-mediated damage, such as TBI and stroke, to assess its in vivo efficacy.
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Affiliation(s)
- Rebecca H Hughes
- Columbia University, Department of Biomedical Engineering, 351 Engineering Terrace, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, USA
| | - Victoria A Silva
- Columbia University, Department of Biomedical Engineering, 351 Engineering Terrace, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, USA
| | - Ijaz Ahmed
- Rutgers, The State University of New Jersey, Department of Biomedical Engineering, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - David I Shreiber
- Rutgers, The State University of New Jersey, Department of Biomedical Engineering, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Barclay Morrison
- Columbia University, Department of Biomedical Engineering, 351 Engineering Terrace, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, USA.
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27
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Pharmacological effects of active compounds on neurodegenerative disease with gastrodia and uncaria decoction, a commonly used poststroke decoction. ScientificWorldJournal 2013; 2013:896873. [PMID: 24348193 PMCID: PMC3851952 DOI: 10.1155/2013/896873] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 09/17/2013] [Indexed: 01/14/2023] Open
Abstract
Neurodegenerative diseases refer to the selective loss of neuronal systems in patients. The diseases cause high morbidity and mortality to approximately 22 million people worldwide and the number is expected to be tripled by 2050. Up to now, there is no effective prevention and treatment for the neurodegenerative diseases. Although some of the clinical therapies target at slowing down the progression of symptoms of the diseases, the general effectiveness of the drugs has been far from satisfactory. Traditional Chinese medicine becomes popular alternative remedies as it has been practiced clinically for more than thousands of years in China. As neurodegenerative diseases are mediated through different pathways, herbal decoction with multiple herbs is used as an effective therapeutic approach to work on multiple targets. Gastrodia and Uncaria Decoction, a popular TCM decoction, has been used to treat stroke in China. The decoction contains compounds including alkaloids, flavonoids, iridoids, carotenoids, and natural phenols, which have been found to possess anti-inflammatory, antioxidative, and antiapoptotic effects. In this review, we will summarize the recent publications of the pharmacological effects of these five groups of compounds. Understanding the mechanisms of action of these compounds may provide new treatment opportunities for the patients with neurodegenerative diseases.
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Ma CJ, Nie AF, Zhang ZJ, Zhang ZG, Du L, Li XY, Ning G. Genipin stimulates glucose transport in C2C12 myotubes via an IRS-1 and calcium-dependent mechanism. J Endocrinol 2013; 216:353-62. [PMID: 23257267 DOI: 10.1530/joe-11-0473] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Genipin, a compound derived from Gardenia jasminoides Ellis fruits, has been used over the years in traditional Chinese medicine to treat symptoms of type 2 diabetes. However, the molecular basis for its antidiabetic effect has not been fully revealed. In this study, we investigated the effects of genipin on glucose uptake and signaling pathways in C(2)C(12) myotubes. Our study demonstrates that genipin stimulated glucose uptake in a time- and dose-dependent manner. The maximal effect was achieved at 2 h with a concentration of 10 μM. In myotubes, genipin promoted glucose transporter 4 (GLUT4) translocation to the cell surface, which was observed by analyzing their distribution in subcellular membrane fraction, and increased the phosphorylation of insulin receptor substrate-1 (IRS-1), AKT, and GSK3β. Meanwhile, genipin increased ATP levels, closed K(ATP) channels, and then increased the concentration of calcium in the cytoplasm in C(2)C(12) myotubes. Genipin-stimulated glucose uptake could be blocked by both the PI3-K inhibitor wortmannin and calcium chelator EGTA. Moreover, genipin increases the level of reactive oxygen species and ATP in C(2)C(12) myotubes. These results suggest that genipin activates IRS-1, PI3-K, and downstream signaling pathway and increases concentrations of calcium, resulting in GLUT4 translocation and glucose uptake increase in C(2)C(12) myotubes.
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Affiliation(s)
- Chan-Juan Ma
- Shanghai Key Laboratory of Endocrine Tumor, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrinology and Metabolism, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Rui-Jin Hospital, 197 Rui-Jin 2nd Road, Shanghai 200025, People's Republic of China
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Liu H, Chen YF, Li F, Zhang HY. Fructus Gardenia (Gardenia jasminoides J. Ellis) phytochemistry, pharmacology of cardiovascular, and safety with the perspective of new drugs development. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2012; 15:94-110. [PMID: 23211013 DOI: 10.1080/10286020.2012.723203] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The phytochemistry, cardiovascular pharmacology, toxicology, side effect, and further development prospects of Gardenia jasminoides J. Ellis (GJE) and its main constituents crocins and iridoid glycosides were studied. Numerous studies have confirmed that crocins and iridoid glycosides had effects of antioxidation, anti-inflammatory, anti-atherosclerosis, anti-ischemic brain injuries, anti-platelet aggregation, anti-hyperglycemia, anti-hyperlipidemia, anti-hypertension, and so on. Some of them might be related to several attractive pharmacodynamic actions of GJE such as promoting endothelium growth, protecting neurons, and inducing their differentiation. Both of them make it possible for GJE to prevent and cure thromboembolism and cardiovascular diseases well. From our own basic pharmacological research of GJE extract on several rat models, it has been known that GJE extract markedly prolonged bleeding time and inhibited platelet aggregation and thrombosis. It has significant proliferation effect on both endothelial cells and endothelial progenitor cells as well. As the mechanisms of GJE on those diseases were discussed and summarized, questions about its genetoxicity and hepatotoxicity were also discussed during its safety study to make the foundation for long-term medication and clinical research in the near future.
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Affiliation(s)
- Hao Liu
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China.
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Hiramatsu K, Sakata H, Horita Y, Orita N, Kida A, Mizukami A, Miyazawa M, Hirai S, Shimatani A, Matsuda K, Matsuda M, Ogino H, Fujinaga H, Terada I, Shimizu K, Uchiyama A, Ishizawa S, Abo H, Demachi H, Noda Y. Mesenteric phlebosclerosis associated with long-term oral intake of geniposide, an ingredient of herbal medicine. Aliment Pharmacol Ther 2012; 36:575-86. [PMID: 22817400 DOI: 10.1111/j.1365-2036.2012.05221.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2012] [Revised: 06/27/2012] [Accepted: 06/29/2012] [Indexed: 01/13/2023]
Abstract
BACKGROUND Idiopathic mesenteric phlebosclerosis (IMP) is a rare disease, characterised by thickening of the wall of the right hemicolon with calcification of mesenteric veins. However, the aetiology remains unknown. AIM To investigate the possible association of herbal medicines with IMP. METHOD The clinical data of four of our own patients were collected. Furthermore, we searched for previous reports about similar patients with detailed descriptions of herbal prescriptions that they had taken. We compared herbal ingredients to identify the toxic agent as a possible aetiological factor. RESULTS Clinical data on a total of 25 patients were summarised. Mean age was 61.8 years and there was female predominance (6 men and 19 women). The used Kampo prescription, the number of cases, and the mean duration of use were as follows: kamisyoyosan in 12 cases for 12.8 years, inshin-iseihaito in 5 cases for 13.4 years, orengedokuto in 4 cases for 14.3 years, inchinkoto in 1 case for 20 years, kamikihitou in 1 case for 19 years, seijobofuto in 1 case for 10 years and gorinsan in 1 case for an unknown duration. Only one ingredient, sansisi, was common to the herbal medicines of all 25 patients. This crude drug called geniposide in English is a major constituent of the Gardenia fruits. CONCLUSION The long-term use of geniposide in herbal medicines appears to be associated with mesenteric phlebosclerosis.
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Affiliation(s)
- K Hiramatsu
- Department of Internal Medicine, Toyama Prefectural Central Hospital, Toyama, Japan.
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Differential cross-linking and radio-protective effects of genipin on mature bovine and human patella tendons. Cell Tissue Bank 2012; 14:21-32. [PMID: 22350064 DOI: 10.1007/s10561-012-9295-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 01/24/2012] [Indexed: 01/14/2023]
Abstract
Gamma irradiation is a proven sterilization method, but is not widely used on allografts for anterior cruciate ligament reconstruction (e.g., patella tendon) due to radiation-induced decreases in mechanical strength. Addressing this drawback would improve the safety and supply of allografts to meet current and future demand. It was hypothesized that genipin-induced collagen cross-linking would increase the tensile modulus of patella tendon tissue such that 5 MRad gamma irradiation would not reduce the tissue mechanical strength below the original untreated values. Optimized genipin treatment increased the tensile modulus of bovine tendons by ~2.4-fold. After irradiation, genipin treated tissue did not significantly differ from native tissue, proving the hypothesis. Optimized genipin treatment of human tendons increased the tensile modulus by ~1.3-fold. After irradiation, both control and genipin-treated tissues possessed ~50-60% of their native tendon modulus, disproving the hypothesis. These results highlight possible age- and species- dependent effects of genipin cross-linking on tendon tissue. Cross-linking of human allografts may be beneficial only in younger donor tissues. Future research is warranted to better understand the mechanisms and applications of collagen cross-linking for clinical use.
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Koriyama Y, Takagi Y, Chiba K, Yamazaki M, Arai K, Matsukawa T, Suzuki H, Sugitani K, Kagechika H, Kato S. Neuritogenic activity of a genipin derivative in retinal ganglion cells is mediated by retinoic acid receptor β expression through nitric oxide/S-nitrosylation signaling. J Neurochem 2011; 119:1232-42. [PMID: 21995424 DOI: 10.1111/j.1471-4159.2011.07533.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Genipin, a herbal iridoid, is known to have both neuroprotective and neuritogenic activity in neuronal cell lines. As it is structurally similar to tetrahydrobiopterin, its activity is believed to be nitric oxide (NO)-dependent. We previously proposed a novel neuroprotective activity of a genipin derivative, (1R)-isoPropyloxygenipin (IPRG001), whereby it reduces oxidative stress in RGC-5, a neuronal precursor cell line of retinal origin through protein S-nitrosylation. In the present study, we investigated another neuritogenic property of IPRG001 in RGC-5 cells and retinal explant culture where in we focused on the NO-cGMP-dependent and protein S-nitrosylation pathways. IPRG001 stimulated neurite outgrowth in RGC-5 cells and retinal explant culture through NO-dependent signaling, but not NO-dependent cGMP signaling. Neurite outgrowth with IPRG001 requires retinoic acid receptor β (RARβ) expression, which is suppressed by an RAR blocking agent and siRNA inhibition. Thereby, we hypothesized that RARβ expression is mediated by protein S-nitrosylation. S-nitrosylation of histone deacetylase 2 is a key mechanism in chromatin remodeling leading to transcriptional gene activation. We found a parallelism between S-nitrosylation of histone diacetylase 2 and the induction of RARβ expression with IPRG001 treatment. The both neuroprotective and neuritogenic activities of genipin could be a new target for the regeneration of retinal ganglion cells after glaucomatous conditions.
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Affiliation(s)
- Yoshiki Koriyama
- Department of Molecular Neurobiology, Graduate School of Medicine, Kanazawa University, Kanazawa, Japan.
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Zhang Y, Meng FC, Cui YL, Song YF. Enhancing effect of hydroxypropyl-β-cyclodextrin on the intestinal absorption process of genipin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:10919-26. [PMID: 21910453 DOI: 10.1021/jf202712y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The purpose of this work is to investigate the effect of the genipin/hydroxypropyl-β-cyclodextrin (HP-β-CD) inclusion complex on the intestinal absorption of genipin and identify its mechanism of action. The phase solubility profile was classified as A(L) type, indicating the formulation of a 1:1 stoichiometry inclusion complex. Fourier transform infrared spectroscopy, Differential scanning calorimetry, X-ray powder diffractometry, and (1)H nuclear magnetic resonance (NMR) and two-dimensional (2D) (1)H rotating-frame Overhauser enhancement (ROESY) NMR spectroscopies further confirmed the formulation of the inclusion complex with superior dissolution properties than the drug alone. The results of single-pass intestinal perfusion showed that the intestinal absorption of genipin was affected by P-glycoprotein (Pgp). The absorption rate and permeability value of the inclusion complex were significantly higher than the free drug, suggesting that its enhancing effect was involved in its solubilizing effect and Pgp inhibitory effect. The mechanisms of HP-β-CD on Pgp inhibition were demonstrated by restraining the Pgp ATPase activity rather than changing the fluidity of the cell membrane.
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Affiliation(s)
- Ye Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, People's Republic of China
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Gami-Chunghyuldan ameliorates memory impairment and neurodegeneration induced by intrahippocampal Aβ 1-42 oligomer injection. Neurobiol Learn Mem 2011; 96:306-14. [PMID: 21689771 DOI: 10.1016/j.nlm.2011.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Revised: 04/21/2011] [Accepted: 06/06/2011] [Indexed: 12/25/2022]
Abstract
Soluble oligomeric forms of amyloid beta (AβO) are regarded as a main cause of synaptic and cognitive dysfunction in Alzheimer's disease (AD) and have been a primary target in the development of drug treatments for AD. The present study utilized a mouse model of AD induced by intrahippocampal injection of AβO (10 μM) to investigate the effects of Gami-Chunghyuldan (GCD), a standardized multi-herbal medicinal formula, on the presentation of memory deficits and neurohistological pathogenesis. GCD (10 and 50mg/kg/day, 5 days, p.o.) improved AβO-induced memory impairment as well as reduced neuronal cell death, astrogliosis, and microgliosis in the hippocampus. In addition, GCD prevented AβO-triggered synaptic disruption and cholinergic fiber loss. These results suggest that GCD may be useful in the prevention and treatment of AD.
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Koriyama Y, Chiba K, Yamazaki M, Suzuki H, Ichiro Muramoto K, Kato S. Long-acting genipin derivative protects retinal ganglion cells from oxidative stress models in vitro and in vivo through the Nrf2/antioxidant response element signaling pathway. J Neurochem 2010; 115:79-91. [DOI: 10.1111/j.1471-4159.2010.06903.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Nam KN, Choi YS, Jung HJ, Park GH, Park JM, Moon SK, Cho KH, Kang C, Kang I, Oh MS, Lee EH. Genipin inhibits the inflammatory response of rat brain microglial cells. Int Immunopharmacol 2010; 10:493-9. [DOI: 10.1016/j.intimp.2010.01.011] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Revised: 01/18/2010] [Accepted: 01/23/2010] [Indexed: 10/19/2022]
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Lu Y, Zhang T, Tao J, Ji G, Wang S. Preparation, characterization, and pharmacokinetics of the inclusion complex of genipin-β-cyclodextrin. Drug Dev Ind Pharm 2009; 35:1452-9. [DOI: 10.3109/03639040903002151] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Tanaka M, Yamazaki M, Chiba K. Neuroprotective action of genipin on tunicamycin-induced cytotoxicity in neuro2a cells. Biol Pharm Bull 2009; 32:1220-3. [PMID: 19571389 DOI: 10.1248/bpb.32.1220] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Accumulation of unfolding or misfolded proteins within the lumen of the endoplasmic reticulum (ER) triggers ER stress, and sustained ER stress ultimately leads to cell death. Both of these events are involved in the activation of glucose-regulated protein of 78 kDa (GRP78, also known as Bip), CCAAT/enhancer-binding protein (C/EBP) homologous protein (CHOP, also known as growth arrest and DNA damage-inducible gene 153 (GADD153)), and caspase-12. ER stress has been shown to be involved in neurodegenerative disorders, such as Alzheimer, Parkinson, and polyglutamine diseases. We previously showed that genipin, a natural iridoid compound, has a protective effect against amyloid-beta (Abeta)-induced cytotoxicity. Here, we studied the protective effects of genipin on cytotoxicity induced in Neuro2a cells by the specific ER stress inducer tunicamycin (TM). TM treatment significantly reduced cell viability in a dose-dependent manner. Genipin dramatically rescued the cells against TM-induced cell death. In addition, genipin suppressed ER stress-induced upregulation of CHOP and GRP78. These data suggest that genipin is effective at protecting against neurodegenerative disorders.
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Affiliation(s)
- Masayuki Tanaka
- Organization for Frontier Research in Preventive Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Hokuriku University.
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Chang CJ. The Effect of Pulse-Released Nerve Growth Factor from Genipin-Crosslinked Gelatin in Schwann Cell–Seeded Polycaprolactone Conduits on Large-Gap Peripheral Nerve Regeneration. Tissue Eng Part A 2009; 15:547-57. [DOI: 10.1089/ten.tea.2007.0342] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yamazaki M, Chiba K, Yoshikawa C. Genipin Suppresses A23187-Induced Cytotoxicity in Neuro2a Cells. Biol Pharm Bull 2009; 32:1043-6. [DOI: 10.1248/bpb.32.1043] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Matsumi Yamazaki
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
| | - Kenzo Chiba
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
- Organization for Frontier Research in Preventive Pharmaceutical Sciences, Hokuriku University
| | - Chiaki Yoshikawa
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
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Metabolism and pharmacokinetics of genipin and geniposide in rats. Food Chem Toxicol 2008; 46:2764-9. [DOI: 10.1016/j.fct.2008.04.033] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2007] [Revised: 04/21/2008] [Accepted: 04/28/2008] [Indexed: 11/17/2022]
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Choi JY, Pena ID, Choi JH, Yoon SY, Yim DS, Lee YS, Ko KH, Shin CY, Ryu JH, Kim WK, Cheong JH. Psychopharmacological Profile of the Water Extract of Gardenia jasminoides and Its Constituents, Genipin and Geniposide, in Mice. Biomol Ther (Seoul) 2008. [DOI: 10.4062/biomolther.2008.16.2.118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Yamazaki M, Chiba K. Genipin exhibits neurotrophic effects through a common signaling pathway in nitric oxide synthase-expressing cells. Eur J Pharmacol 2007; 581:255-61. [PMID: 18178184 DOI: 10.1016/j.ejphar.2007.12.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2006] [Revised: 11/20/2007] [Accepted: 12/04/2007] [Indexed: 10/22/2022]
Abstract
We have reported previously that genipin, a natural iridoid compound, induces neuritogenesis through a nitric oxide (NO)-cyclic GMP (cGMP)-cGMP-dependent protein kinase (PKG) signaling pathway in PC12h cells and that neuronal NO synthase (nNOS) is one of the target molecules of genipin in vitro. Recently, it has been suggested that the neurotrophic effects of NO are due to its direct activation of receptor-tyrosine kinase, especially TrkA. In this study, we investigated whether mouse neuroblastoma Neuro2a cells, which express nNOS but not TrkA, respond to genipin with neurite outgrowth through the mechanism observed in PC12h cells, to assess the involvement of TrkA in the mechanism. Neuro2a cells expressed all three types of NO synthase (NOS), and nNOS was detectable as the main component in Western blot analysis. Genipin significantly induced neurite outgrowth and activation of NADPH-diaphorase, which were significantly blocked by a non-selective NOS inhibitor. Both a soluble guanylate cyclase inhibitor and a PKG inhibitor also inhibited the genipin-induced neuritogenesis. Genipin induced sustained phosphorylation of mitogen-activated protein kinase (MAPK). In fact, the genipin-induced neurite outgrowth was completely inhibited by a specific MAPK kinase inhibitor. Moreover, a NOS inhibitor abolished MAPK phosphorylation as well as neurite outgrowth in genipin-treated cells. These results suggest that genipin induces neurite outgrowth through an NO-cGMP-PKG signaling pathway followed by MAPK phosphorylation without TrkA activation in Neuro2a cells and that PKG downstream to NOSs, which may be mainly nNOS, is very important for the signaling molecule to induce neuritogenesis by genipin.
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Affiliation(s)
- Matsumi Yamazaki
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3 Kanagawa-machi, Kanazawa, Ishikawa 920-1181, Japan.
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Liu H, Gao L, Liu M, Li Q, Jiang Y, Zhang S. Characterization and determination of genipin-1-β-gentiobioside in gardenia fruit by high-performance liquid chromatography with ultraviolet detection following electrospray ionization mass spectrometry. Microchem J 2006. [DOI: 10.1016/j.microc.2006.04.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Koo HJ, Lim KH, Jung HJ, Park EH. Anti-inflammatory evaluation of gardenia extract, geniposide and genipin. JOURNAL OF ETHNOPHARMACOLOGY 2006; 103:496-500. [PMID: 16169698 DOI: 10.1016/j.jep.2005.08.011] [Citation(s) in RCA: 287] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2005] [Revised: 07/29/2005] [Accepted: 08/08/2005] [Indexed: 05/04/2023]
Abstract
Gardenia fruit has been traditionally used as a folk medicine for centuries in Asian countries. Extraction with ethanol was used to obtain an extract (GFE) that contains two known constituents, geniposide and genipin, which were subsequently evaluated for anti-inflammatory activity. GFE, genipin, and geniposide showed acute anti-inflammatory activities in carrageenan-induced rat paw edema. In a dose-dependent manner, GFE also inhibited vascular permeability induced by acetic acid. Both genipin and geniposide inhibited production of exudate and nitric oxide (NO) in the rat air pouch edema model. However, genipin possessed stronger anti-inflammatory activity than geniposide, as demonstrated by the results with carrageenan-induced rat paw edema, carrageenan-induced air pouch formation, and measurement of NO content in the exudates. GFE caused a dose-dependent inhibition of acetic acid-induced abdominal writhing in mice. Collectively, genipin, rather than geniposide, is the major anti-inflammatory component of gardenia fruit.
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Affiliation(s)
- Hye-Jin Koo
- College of Pharmacy, Sookmyung Women's University, Seoul 140-742, Republic of Korea
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Yamazaki M, Chiba K. Expression of Functional Nitric Oxide Synthase for Neuritogenesis in PC12h Cells. ACTA ACUST UNITED AC 2006. [DOI: 10.1248/jhs.52.769] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Matsumi Yamazaki
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
| | - Kenzo Chiba
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
- Organization for Frontier Research in Preventive Pharmaceutical Sciences, Hokuriku University
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Lee P, Lee J, Choi SY, Lee SE, Lee S, Son D. Geniposide from Gardenia jasminoides Attenuates Neuronal Cell Death in Oxygen and Glucose Deprivation-Exposed Rat Hippocampal Slice Culture. Biol Pharm Bull 2006; 29:174-6. [PMID: 16394534 DOI: 10.1248/bpb.29.174] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Geniposide from Gardenia jasminoides protected neuronal cells from damage in oxygen and glucose deprivation-exposed hippocampal slice culture. Geniposide showed a greater protective effect on the granule cell layer than on the pyramidal cell layer including CA 1 and CA 3. On the basis of the experimental results, geniposide may be a therapeutic agent for ischemia in patients.
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Affiliation(s)
- Pyeongjae Lee
- Department of Agricultural Biology, National Institute of Agricultural Science and Technology, Korea
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Yamazaki M, Chiba K, Mohri T. Differences in neuritogenic response to nitric oxide in PC12 and PC12h cells. Neurosci Lett 2005; 393:222-5. [PMID: 16239071 DOI: 10.1016/j.neulet.2005.09.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Revised: 09/26/2005] [Accepted: 09/27/2005] [Indexed: 10/25/2022]
Abstract
We have demonstrated that a natural iridoid compound, genipin, induces neurite outgrowth through the nitric oxide (NO)-cGMP-protein kinase G signaling pathway in PC12h cells. PC12 cells, the parental cell line of PC12h cells, have been shown to carry out neurite extension that accompanies NO production in response to nerve growth factor (NGF). This neurite outgrowth was significantly inhibited by NG-nitro-L-arginine methyl ester (L-NAME), an NO synthase inhibitor, in both PC12 and PC12h cells, suggesting that the neuritogenesis is NO-dependent in both cells. In this report, we investigated whether genipin also induces neurite outgrowth in PC12 cells in order to determine the NO-dependent neurotrophic action of genipin in more than just one cell type. Genipin induced marked neurite outgrowth in PC12h cells but not in PC12 cells. The genipin-induced neurite outgrowth was significantly inhibited by L-NAME in PC12h cells. An NO donor, NOR4, also significantly induced neurite outgrowth in a concentration-dependent manner in PC12h cells but not in PC12 cells. On the other hand, NGF-primed PC12 cells exhibited significant neurite extension, which was inhibited by L-NAME, in response to genipin. Interestingly, NGF-primed PC12 cells responded to NOR4 extending neurites and expressed detectable neuronal NO synthase protein which is not detected in naive PC12 cells. These results suggest that genipin exerts a neuritogenic action on neuronal cells which are responsive to NO itself. Furthermore, the results also suggest that PC12h cells are more suitable for the study of NO-dependent neuronal function than PC12 cells which were not responsive to NO.
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Affiliation(s)
- Matsumi Yamazaki
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University, HO-3 Kanagawa-machi, Kanazawa, Ishikawa 920-1181, Japan.
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Affiliation(s)
- Matsumi Yamazaki
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
| | - Kenzo Chiba
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Hokuriku University
- Organization for Frontier Research in Preventive Pharmaceutical Sciences, Hokuriku University
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Pharmacological activities of iridoids biosynthesized by route II. BIOACTIVE NATURAL PRODUCTS (PART L) 2005. [DOI: 10.1016/s1572-5995(05)80060-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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