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Lo J, Mehta K, Dhillon A, Huang YK, Luo Z, Nam MH, Al Diri I, Chang KC. Therapeutic strategies for glaucoma and optic neuropathies. Mol Aspects Med 2023; 94:101219. [PMID: 37839232 PMCID: PMC10841486 DOI: 10.1016/j.mam.2023.101219] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 10/02/2023] [Accepted: 10/09/2023] [Indexed: 10/17/2023]
Abstract
Glaucoma is a neurodegenerative eye disease that causes permanent vision impairment. The main pathological characteristics of glaucoma are retinal ganglion cell (RGC) loss and optic nerve degeneration. Glaucoma can be caused by elevated intraocular pressure (IOP), although some cases are congenital or occur in patients with normal IOP. Current glaucoma treatments rely on medicine and surgery to lower IOP, which only delays disease progression. First-line glaucoma medicines are supported by pharmacotherapy advancements such as Rho kinase inhibitors and innovative drug delivery systems. Glaucoma surgery has shifted to safer minimally invasive (or microinvasive) glaucoma surgery, but further trials are needed to validate long-term efficacy. Further, growing evidence shows that adeno-associated virus gene transduction and stem cell-based RGC replacement therapy hold potential to treat optic nerve fiber degeneration and glaucoma. However, better understanding of the regulatory mechanisms of RGC development is needed to provide insight into RGC differentiation from stem cells and help choose target genes for viral therapy. In this review, we overview current progress in RGC development research, optic nerve fiber regeneration, and human stem cell-derived RGC differentiation and transplantation. We also provide an outlook on perspectives and challenges in the field.
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Affiliation(s)
- Jung Lo
- Department of Ophthalmology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, 83301, Taiwan
| | - Kamakshi Mehta
- Department of Ophthalmology, Louis J. Fox Center for Vision Restoration, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA
| | - Armaan Dhillon
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Yu-Kai Huang
- Department of Neurosurgery, Kaohsiung Medical University Hospital, Kaohsiung, 80708, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Ziming Luo
- Spencer Center for Vision Research, Byers Eye Institute, Stanford University School of Medicine, Palo Alto, CA, 94304, USA
| | - Mi-Hyun Nam
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA.
| | - Issam Al Diri
- Department of Ophthalmology, Louis J. Fox Center for Vision Restoration, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA.
| | - Kun-Che Chang
- Department of Ophthalmology, Louis J. Fox Center for Vision Restoration, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15219, USA; Department of Neurobiology, Center of Neuroscience, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.
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Panja S, Gaikwad H, Rankenberg J, Nam MH, Nagaraj RH. Promotion of Protein Solubility and Reduction in Stiffness in Human Lenses by Aggrelyte-1: Implications for Reversing Presbyopia. Int J Mol Sci 2023; 24:ijms24032196. [PMID: 36768517 PMCID: PMC9917358 DOI: 10.3390/ijms24032196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
With aging, human lenses lose the ability to focus on nearby objects due to decreases in accommodative ability, a condition known as presbyopia. An increase in stiffness or decrease in lens elasticity due to protein aggregation and insolubilization are the primary reasons for presbyopia. In this study, we tested aggrelyte-1 (S,N-diacetyl glutathione diethyl ester) for its ability to promote protein solubility and decrease the stiffness of lenses through its dual property of lysine acetylation and disulfide reduction. Treatment of water-insoluble proteins from aged human lenses (58-75 years) with aggrelyte-1 significantly increased the solubility of those proteins. A control compound that did not contain the S-acetyl group (aggrelyte-1C) was substantially less efficient in solubilizing water-insoluble proteins. Aggrelyte-1-treated solubilized protein had significant amounts of acetyllysine, as measured by Western blotting and LC-MS/MS. Aggrelytes increased the protein-free thiol content in the solubilized protein. Aged mouse (7 months) and human (44-66 years) lenses treated with aggrelyte-1 showed reduced stiffness accompanied by higher free thiol and acetyllysine levels compared with those treated with aggrelyte-1C or untreated controls. Our results suggested that aggrelyte-1 reduced lens stiffness through acetylation followed by disulfide reduction. This proof-of-concept study paves the way for developing aggrelyte-1 and related compounds to reverse presbyopia.
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Affiliation(s)
- Sudipta Panja
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO 80045, USA
| | - Hanmant Gaikwad
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Johanna Rankenberg
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO 80045, USA
| | - Mi-Hyun Nam
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO 80045, USA
| | - Ram H. Nagaraj
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO 80045, USA
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
- Correspondence: ; Tel.: +1-303–724-5922
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Nam MH, Nahomi RB, Pantcheva MB, Dhillon A, Chiodo VA, Smith WC, Nagaraj RH. AAV2-Mediated Expression of HspB1 in RGCs Prevents Somal Damage and Axonal Transport Deficits in a Mouse Model of Ocular Hypertension. Transl Vis Sci Technol 2022; 11:8. [DOI: 10.1167/tvst.11.11.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Mi-Hyun Nam
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Rooban B. Nahomi
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Mina B. Pantcheva
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Armaan Dhillon
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Vince A. Chiodo
- Department of Ophthalmology, University of Florida, Gainesville, FL, USA
| | - W. Clay Smith
- Department of Ophthalmology, University of Florida, Gainesville, FL, USA
| | - Ram H. Nagaraj
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
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Park HY, Lee HB, Lee SY, Oh MJ, Ha SK, Do E, Lee HHL, Hur J, Lee KW, Nam MH, Park MG, Kim Y. Lactococcus lactis KF140 Reduces Dietary Absorption of Nε - (Carboxymethyl)lysine in Rats and Humans via β-Galactosidase Activity. Front Nutr 2022; 9:916262. [PMID: 35811971 PMCID: PMC9263842 DOI: 10.3389/fnut.2022.916262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 06/09/2022] [Indexed: 12/03/2022] Open
Abstract
Background and Aims Excessive intake of advanced glycation end products (AGEs), which are formed in foods cooked at high temperatures for long periods of time, has negative health effects, such as inflammatory responses and oxidative stress. Nε-(Carboxymethyl)lysine (CML) is one of the major dietary AGEs. Given their generally recognized as safe status and probiotic functionalities, lactic acid bacteria may be ideal supplements for blocking intestinal absorption of food toxicants. However, the protective effects of lactic acid bacteria against dietary AGEs have not been fully elucidated. Materials and Methods We investigated the effect of treatment with Lactococcus lactis KF140 (LL-KF140), which was isolated from kimchi, on the levels and toxicokinetics of CML. The CML reduction efficacies of the Lactococcus lactis KF140 (LL-KF140), which was isolated from kimchi, were conducted by in vitro test for reducing CML concentration of the casein-lactose reaction product (CLRP) and in vivo test for reducing serum CML level of LL-KF140 administered rats at 2.0 × 108 CFU/kg for14 days. In addition, 12 volunteers consuming LL-KF140 at 2.0 × 109 CFU/1.5 g for 26 days were determined blood CML concentration and compared with that before intake a Parmesan cheese. Results Administration of LL-KF140 reduced serum CML levels and hepatic CML absorption in rats that were fed a CML-enriched product. In a human trial, the intake of LL-KF140 prevented increases in the serum levels of CML and alanine aminotransferase after consumption of a CML-rich cheese. LL-KF140 was determined to presence in feces through metagenome analysis. Furthermore, β-galactosidase, one of the L. lactis-produced enzymes, inhibited the absorption of CML and reduced the levels of this AGE, which suggests an indirect inhibitory effect of LL-KF140. This study is the first to demonstrate that an L. lactis strain and its related enzyme contribute to the reduction of dietary absorption of CML.
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Affiliation(s)
- Ho-Young Park
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Hye-Bin Lee
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - So-Young Lee
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Mi-Jin Oh
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Sang Keun Ha
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Eunju Do
- Clinical Trial Convergence Commercialization Team, Daegu Technopark, Daegu, South Korea
| | - Hyun Hee L. Lee
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Jinyoung Hur
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Mi-Hyun Nam
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, University of Colorado, Aurora, Aurora, CO, United States
| | | | - Yoonsook Kim
- Food Functionality Research Division, Korea Food Research Institute, Jeollabuk-do, South Korea
- *Correspondence: Yoonsook Kim,
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Rajeswaren V, Wong JO, Yabroudi D, Nahomi RB, Rankenberg J, Nam MH, Nagaraj RH. Small Heat Shock Proteins in Retinal Diseases. Front Mol Biosci 2022; 9:860375. [PMID: 35480891 PMCID: PMC9035800 DOI: 10.3389/fmolb.2022.860375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/11/2022] [Indexed: 11/29/2022] Open
Abstract
This review summarizes the latest findings on small heat shock proteins (sHsps) in three major retinal diseases: glaucoma, diabetic retinopathy, and age-related macular degeneration. A general description of the structure and major cellular functions of sHsps is provided in the introductory remarks. Their role in specific retinal diseases, highlighting their regulation, role in pathogenesis, and possible use as therapeutics, is discussed.
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Affiliation(s)
- Vivian Rajeswaren
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Jeffrey O. Wong
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Dana Yabroudi
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Rooban B. Nahomi
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Johanna Rankenberg
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Mi-Hyun Nam
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
- *Correspondence: Mi-Hyun Nam, ; Ram H. Nagaraj,
| | - Ram H. Nagaraj
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, United States
- *Correspondence: Mi-Hyun Nam, ; Ram H. Nagaraj,
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Nam HK, Jeong SR, Pyo MC, Ha SK, Nam MH, Lee KW. Methylglyoxal-Derived Advanced Glycation End Products (AGE4) Promote Cell Proliferation and Survival in Renal Cell Carcinoma Cells through the RAGE/Akt/ERK Signaling Pathways. Biol Pharm Bull 2021; 44:1697-1706. [PMID: 34719646 DOI: 10.1248/bpb.b21-00382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Advanced glycation end products (AGEs) are the products formed through a non-enzymatic reaction of reducing sugars with proteins or lipids. There is a potential for toxicity in the case of AGEs produced through glycation with dicarbonyl compounds including methylglyoxal, glyoxal, and 3-deoxyglucosone. The AGEs bind the receptor for advanced glycation end products (RAGE) and stimulate the mitogen-activated protein (MAP) kinase signaling pathway that can increase the production of matrix metalloproteinases (MMPs). In addition, AGE-induced protein kinase B (Akt) signaling can promote cancer cell proliferation and contribute to many diseases such as kidney cancer. In light of the lack of extensive study of the relationship between methylglyoxal-induced AGEs (AGE4) and renal cancer, we studied the proliferous and anti-apoptotic effects of AGE4 on renal cell carcinoma (RCC) in this study. AGE4 treatment was involved in the proliferation and migration of RCC cells in vitro by upregulating proliferating cell nuclear antigen (PCNA) and MMPs while suppressing apoptotic markers such as Bax and caspase 3. Moreover, Akt and extracellular-signal-regulated kinase (ERK) were phosphorylated in RCC cells with AGE4 treatment. As a result, this study demonstrated that AGE4-RAGE axis can promote the growth ability of RCC by inducing PCNA, MMPs, and inhibiting apoptosis in RCC via the Akt and ERK signaling pathways.
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Affiliation(s)
- Han-Kyul Nam
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University
| | - So-Ra Jeong
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University
| | - Min Cheol Pyo
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University
| | - Sang-Keun Ha
- Division of Functional Food Research, Korea Food Research Institute
| | - Mi-Hyun Nam
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University
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Jeon GY, Nam MH, Lee KW. Inhibitory effect of caffeic acid on advanced glycation end product-induced renal fibrosis in vitro: A potential therapeutic target. J Food Sci 2021; 86:579-586. [PMID: 33448051 DOI: 10.1111/1750-3841.15588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 11/18/2020] [Accepted: 12/04/2020] [Indexed: 12/12/2022]
Abstract
Advanced glycation end products (AGEs) are formed from amino acids and reducing sugars through nonenzymatic Maillard reaction. AGEs are known to induce oxidative stress, which may cause fibrosis or cancer. In this study, we investigated the protective effect of caffeic acid (CA) on AGE-mediated kidney epithelial to mesenchymal transition (EMT) in human HK-2 cells. Exposure to 100 µg/mL of AGEs by kidney epithelial cells raised the production of reactive oxygen species by 5.2-fold and decreased levels of glutathione. In addition, cardamonin, a β-catenin inhibitor, was used to determine the signaling pathway for β-catenin in which cardamonin inhibited the AGEs-induced translocation of β-catenin into the nucleus, resulting in an inhibition of the EMT process. Similarly, our findings showed that, close to the control level, CA treatment decreased AGE-mediated oxidative stress, loss of E-cadherin expression, and overexpression of α-smooth muscle actin and fibronectin by inactivation of the β-catenin pathway. Furthermore, AGE treatment enhanced the expression of collagen type I (1.99-fold) as well as the activity of metalloproteinases 2 (1.86-fold) and 9 (2.79-fold), but such increase was inhibited by the pretreatment of CA. In conclusion, this study determined the inhibitory effect of CA on AGE-induced β-catenin signaling, which prevented the occurrence of EMT in kidney epithelial cells. This suggests that CA may be a potential target for AGE-induced renal fibrosis. PRACTICAL APPLICATION: Exposure of kidney epithelial cells to advanced glycation end products (AGEs) leads to a rise in reactive oxygen species and a decrease in glutathione, thereby increasing oxidative stress that may cause fibrosis. However, treatment of kidney cells with caffeic acid (CA) prior to their exposure to AGEs lowers oxidative stress and decreases fibrosis. This research reveals the beneficial influence of CA on renal fibrosis in laboratory-cultured kidney cells (in vitro), which makes CA a potential therapeutic target for AGE-induced fibrosis.
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Affiliation(s)
- Gyeong Yun Jeon
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.,Department of Ophthalmology, Seoul National University Bundang Hospital, Gyeonggi-do, 13605, Republic of Korea
| | - Mi-Hyun Nam
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.,Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO, 80045, U.S.A
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
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Nahomi RB, Nam MH, Rankenberg J, Rakete S, Houck JA, Johnson GC, Stankowska DL, Pantcheva MB, MacLean PS, Nagaraj RH. Kynurenic Acid Protects Against Ischemia/Reperfusion-Induced Retinal Ganglion Cell Death in Mice. Int J Mol Sci 2020; 21:ijms21051795. [PMID: 32151061 PMCID: PMC7084183 DOI: 10.3390/ijms21051795] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 02/21/2020] [Accepted: 03/02/2020] [Indexed: 12/17/2022] Open
Abstract
Background: Glaucoma is an optic neuropathy and involves the progressive degeneration of retinal ganglion cells (RGCs), which leads to blindness in patients. We investigated the role of the neuroprotective kynurenic acid (KYNA) in RGC death against retinal ischemia/reperfusion (I/R) injury. Methods: We injected KYNA intravenously or intravitreally to mice. We generated a knockout mouse strain of kynurenine 3-monooxygenase (KMO), an enzyme in the kynurenine pathway that produces neurotoxic 3-hydroxykynurenine. To test the effect of mild hyperglycemia on RGC protection, we used streptozotocin (STZ) induced diabetic mice. Retinal I/R injury was induced by increasing intraocular pressure for 60 min followed by reperfusion and RGC numbers were counted in the retinal flat mounts. Results: Intravenous or intravitreal administration of KYNA protected RGCs against I/R injury. The I/R injury caused a greater loss of RGCs in wild type than in KMO knockout mice. KMO knockout mice had mildly higher levels of fasting blood glucose than wild type mice. Diabetic mice showed significantly lower loss of RGCs when compared with non-diabetic mice subjected to I/R injury. Conclusion: Together, our study suggests that the absence of KMO protects RGCs against I/R injury, through mechanisms that likely involve higher levels of KYNA and glucose.
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Affiliation(s)
- Rooban B. Nahomi
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO 80045, USA; (M.-H.N.); (J.R.); (S.R.); (M.B.P.)
- Correspondence: (R.B.N.); (R.H.N.); Tel.: +1-303-724-8824 (R.H.N.)
| | - Mi-Hyun Nam
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO 80045, USA; (M.-H.N.); (J.R.); (S.R.); (M.B.P.)
| | - Johanna Rankenberg
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO 80045, USA; (M.-H.N.); (J.R.); (S.R.); (M.B.P.)
| | - Stefan Rakete
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO 80045, USA; (M.-H.N.); (J.R.); (S.R.); (M.B.P.)
| | - Julie A. Houck
- Division of Endocrinology, Metabolism and Diabetes, School of Medicine, University of Colorado, Aurora, CO 80045, USA; (J.A.H.); (G.C.J.); (P.S.M.)
| | - Ginger C. Johnson
- Division of Endocrinology, Metabolism and Diabetes, School of Medicine, University of Colorado, Aurora, CO 80045, USA; (J.A.H.); (G.C.J.); (P.S.M.)
| | - Dorota L. Stankowska
- Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Mina B. Pantcheva
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO 80045, USA; (M.-H.N.); (J.R.); (S.R.); (M.B.P.)
| | - Paul S. MacLean
- Division of Endocrinology, Metabolism and Diabetes, School of Medicine, University of Colorado, Aurora, CO 80045, USA; (J.A.H.); (G.C.J.); (P.S.M.)
| | - Ram H. Nagaraj
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado, Aurora, CO 80045, USA; (M.-H.N.); (J.R.); (S.R.); (M.B.P.)
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO 80045, USA
- Correspondence: (R.B.N.); (R.H.N.); Tel.: +1-303-724-8824 (R.H.N.)
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Stankowska DL, Nam MH, Nahomi RB, Chaphalkar RM, Nandi SK, Fudala R, Krishnamoorthy RR, Nagaraj RH. Correction: Systemically administered peptain-1 inhibits retinal ganglion cell death in animal models: implications for neuroprotection in glaucoma. Cell Death Discov 2019; 5:122. [PMID: 31372242 PMCID: PMC6668458 DOI: 10.1038/s41420-019-0201-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
- Dorota L Stankowska
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Mi-Hyun Nam
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Rooban B Nahomi
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Renuka M Chaphalkar
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Sandip K Nandi
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Rafal Fudala
- 3Department of Microbiology, Immunology and Genetics, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Raghu R Krishnamoorthy
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Ram H Nagaraj
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA.,4Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO 80045 USA
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Stankowska DL, Nam MH, Nahomi RB, Chaphalkar RM, Nandi SK, Fudala R, Krishnamoorthy RR, Nagaraj RH. Systemically administered peptain-1 inhibits retinal ganglion cell death in animal models: implications for neuroprotection in glaucoma. Cell Death Discov 2019; 5:112. [PMID: 31285855 PMCID: PMC6609721 DOI: 10.1038/s41420-019-0194-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 06/13/2019] [Indexed: 12/13/2022] Open
Abstract
Axonal degeneration and death of retinal ganglion cells (RGCs) are the primary causes of vision loss in glaucoma. In this study, we evaluated the efficacy of a peptide (peptain-1) that exhibits robust chaperone and anti-apoptotic activities against RGC loss in two rodent models and in cultured RGCs. In cultures of rat primary RGCs and in rat retinal explants peptain-1 significantly decreased hypoxia-induced RGC loss when compared to a scrambled peptide. Intraperitoneally (i.p.) injected peptain-1 (conjugated to a Cy7 fluorophore) was detected in the retina indicative of its ability to cross the blood-retinal barrier. Peptain-1 treatment inhibited RGC loss in the retina of mice subjected to ischemia/reperfusion (I/R) injury. A reduction in anterograde axonal transport was also ameliorated by peptain-1 treatment in the retina of I/R injured mice. Furthermore, i.p. injections of peptain-1 significantly reduced RGC death and axonal loss and partially restored retinal mitochondrial cytochrome c oxidase subunit 6b2 (COX 6b2) levels in rats subjected to five weeks of elevated intraocular pressure. We conclude that i.p. injected peptain-1 gains access to the retina and protects both RGC somas and axons against the injury caused by I/R and ocular hypertension. Based on these findings, peptain-1 has the potential to be developed as an efficacious neuroprotective agent for the treatment of glaucoma.
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Affiliation(s)
- Dorota L Stankowska
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Mi-Hyun Nam
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Rooban B Nahomi
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Renuka M Chaphalkar
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Sandip K Nandi
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Rafal Fudala
- 3Department of Microbiology, Immunology and Genetics, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Raghu R Krishnamoorthy
- 1Department of Pharmacology and Neuroscience, North Texas Eye Research Institute, UNT Health Science Center, Fort Worth, TX 76107 USA
| | - Ram H Nagaraj
- 2Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, University of Colorado School of Medicine, Aurora, CO 80045 USA.,4Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO 80045 USA
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Yang SY, Pyo MC, Nam MH, Lee KW. ERK/Nrf2 pathway activation by caffeic acid in HepG2 cells alleviates its hepatocellular damage caused by t-butylhydroperoxide-induced oxidative stress. Altern Ther Health Med 2019; 19:139. [PMID: 31221142 PMCID: PMC6585055 DOI: 10.1186/s12906-019-2551-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 06/07/2019] [Indexed: 02/06/2023]
Abstract
Background Several studies have found that caffeic acid (CA), a well-known phytochemical, displays important antioxidant and anti-cancer activities. However, no evidence exists on the protective effect and its mechanisms that CA treatment alone has against oxidative stress induced by tert-butyl hydroperoxide (t-BHP) in HepG2 cells. Methods Hepatoprotective activities such as cell viability, mRNA expression, and report gene assay were measured using HepG2 cell. Three types of genes and proteins related with detoxification in liver were used for measuring the hepatoprotective effects. Statistical analysis was performed using one-way ANOVA test and differences among groups were evaluated by Tukey’s studentized range tests. Results The present study indicate that treatment with CA up-regulates heme oxygenase-1 (HO-1) and glutamate-cysteine ligase (GCL) mRNA and protein expressions in a CA-dose-dependent manner. In addition, translocation of nuclear factor-E2 p45-related factor (Nrf2) from the cytoplasm to the nucleus and phosphorylation of extracellular signal-regulated kinase, ERK and c-Jun N-terminal kinase, JNK which have been shown to be involved in mitogen-activated protein kinases, MAPKs are significantly enhanced by CA treatment. Furthermore, in cell nuclei, CA enhances the 5′-flanking regulatory region of human antioxidant response element (ARE) and activates the ARE binding site. Conclusion Therefore, CA proved to be a stimulant of the expression of detoxification enzymes such as HO-1, GCLC, and GCLM through the ERK/Nrf2 pathway, and it may be an effective chemoprotective agent for protecting liver damage against oxidative damage. Graphical abstract ![]()
Electronic supplementary material The online version of this article (10.1186/s12906-019-2551-3) contains supplementary material, which is available to authorized users.
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Nam MH, Son WR, Yang SY, Lee YS, Lee KW. Chebulic acid inhibits advanced glycation end products-mediated vascular dysfunction by suppressing ROS via the ERK/Nrf2 pathway. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.06.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Lee KW, Nam MH, Lee HR, Hong CO, Lee KW. Protective effects of chebulic acid on alveolar epithelial damage induced by urban particulate matter. BMC Complement Altern Med 2017; 17:373. [PMID: 28724416 PMCID: PMC5518117 DOI: 10.1186/s12906-017-1870-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 07/04/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND Chebulic acid (CA) isolated from T. chebula, which has been reported for treating asthma, as a potent anti-oxidant resources. Exposure to ambient urban particulate matter (UPM) considered as a risk for cardiopulmonary vascular dysfunction. To investigate the protective effect of CA against UPM-mediated collapse of the pulmonary alveolar epithelial (PAE) cell (NCI-H441), barrier integrity parameters, and their elements were evaluated in PAE. METHODS CA was acquired from the laboratory previous reports. UPM was obtained from the National Institutes of Standards and Technology, and these were collected in St. Louis, MO, over a 24-month period and used as a standard reference. To confirm the protection of PAE barrier integrity, paracellular permeability and the junctional molecules were estimated with determination of transepithelial electrical resistance, Western Blotting, RT-PCR, and fluorescent staining. RESULTS UPM aggravated the generation of reactive oxygen species (ROS) in PAE and also decreased mRNA and protein levels of junction molecules and barrier integrity in NCI-H441. However, CA repressed the ROS in PAE, also improved barrier integrity by protecting the junctional parameters in NCI-H411. CONCLUSIONS These data showed that CA resulted in decreased UPM-induced ROS formation, and the protected the integrity of the tight junctions against UPM exposure to PAE barrier.
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Son WR, Nam MH, Hong CO, Kim Y, Lee KW. Plantamajoside from Plantago asiatica modulates human umbilical vein endothelial cell dysfunction by glyceraldehyde-induced AGEs via MAPK/NF-κB. BMC Complement Altern Med 2017; 17:66. [PMID: 28109289 PMCID: PMC5251346 DOI: 10.1186/s12906-017-1570-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 01/07/2017] [Indexed: 01/25/2023]
Abstract
Background Plantago asiatica has been traditionally used for traditional medicine around East Asia. Plantamajoside (PM), which is isolated from this plant, is known for biological properties including anti-inflammation and antioxidant activity. To demonstrate the biological activity of PM against endothelial dysfunction induced by advanced glycation end-products (AGEs), a cellular inflammatory mechanism system was evaluated in human umbilical vein endothelial cells (HUVECs). Methods We obtained PM through previous research in our laboratory. We formed the AGEs from bovine serum albumin with glyceraldehyde in the dark for seven days. To confirm the modulation of the inflammatory mechanism in endothelial dysfunction, we quantified the various pro-inflammatory cytokines and endothelial dysfunction-related proteins in the HUVECs with Western blotting and with real-time and quantitative real-time polymerase chain reactions. Results Co-treatment with PM and AGEs significantly suppressed inflammatory cytokines and adhesion molecule expression. Moreover, the PM treatment for down-regulated inflammatory signals and blocked monocyte adhesion on the HUVECs. Conclusions Theses results demonstrated that PM, as a potential natural compound, protects AGE-induced endothelial cells against inflammatory cellular dysfunction. Electronic supplementary material The online version of this article (doi:10.1186/s12906-017-1570-1) contains supplementary material, which is available to authorized users.
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Nam MH, Son WR, Lee YS, Lee KW. Glycolaldehyde-derived advanced glycation end products (glycol-AGEs)-induced vascular smooth muscle cell dysfunction is regulated by the AGES-receptor (RAGE) axis in endothelium. ACTA ACUST UNITED AC 2016; 22:67-78. [DOI: 10.1080/15419061.2016.1225196] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mi-Hyun Nam
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Won-Rak Son
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Young Sik Lee
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
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Han AR, Nam MH, Lee KW. Plantamajoside Inhibits UVB and Advanced Glycation End Products-Induced MMP-1 Expression by Suppressing the MAPK and NF-κB Pathways in HaCaT Cells. Photochem Photobiol 2016; 92:708-19. [DOI: 10.1111/php.12615] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 05/22/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Ah-Ram Han
- Department of Biotechnology; College of Life Science & Biotechnology; Korea University; Seoul Korea
| | - Mi-Hyun Nam
- Department of Biotechnology; College of Life Science & Biotechnology; Korea University; Seoul Korea
| | - Kwang-Won Lee
- Department of Biotechnology; College of Life Science & Biotechnology; Korea University; Seoul Korea
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Han AR, Kim SW, Chun SH, Nam MH, Hong CO, Kim BH, Kim TC, Lee KW. Effect of Diet Containing Whole Wheat Bread with Capsosiphon fulvescens and Lindera obtusiloba Ethanol Extracts on Plasma Glucose and Lipid Levels in Rats. ACTA ACUST UNITED AC 2016. [DOI: 10.9721/kjfst.2016.48.2.178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Koo YC, Pyo MC, Nam MH, Hong CO, Yang SY, Lee KW. Chebulic acid prevents hepatic fibrosis induced by advanced glycation end-products in LX-2 cell by modulating Nrf2 translocation via ERK pathway. Toxicol In Vitro 2016; 34:8-15. [PMID: 27021876 DOI: 10.1016/j.tiv.2016.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 03/18/2016] [Accepted: 03/23/2016] [Indexed: 12/30/2022]
Abstract
Advanced glycation end-products (AGEs) are formed during normal aging, and at an accelerated rate in metabolic syndrome patients. Nonalcoholic steatohepatitis (NASH) can be caused by the AGEs in plasma, while glyceraldehyde-derived AGEs (glycer-AGEs) are significantly higher in the serum of NASH patients. In this study, we investigated the molecular mechanisms of chebulic acid, isolated from Terminalia chebula Retz., in the inhibition of glycer-AGEs induced production of reactive oxygen species (ROS) and collagen accumulation using the LX-2 cell line. Chebulic acid significantly inhibited the induction of ROS and accumulation of collagen proteins by glycer-AGEs. ERK phosphorylation and total nuclear factor E2-related factor 2 (Nrf2) protein expression were induced by chebulic acid in a dose-dependent manner. Chebulic acid was also found to induce translocation of Nrf2 into the nucleus, which was attenuated by inhibition of ERK phosphorylation through treatment with PD98059. Following translocation of Nrf2, chebulic acid induced the protein expressions of catalytic subunit of γ-glutamylcysteine synthetase and glutathione synthesis. Collagen accumulation was also significantly reduced by chebulic acid treatment. The observed effects of chebulic acid were all inhibited by PD98059 treatment. Taken together, these results suggest that chebulic acid prevents the glycer-AGEs-induced ROS formation of LX-2 cells and collagen accumulation by ERK-phosphorylation-mediated Nrf2 nuclear translocation, which causes upregulation of antioxidant protein production.
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Affiliation(s)
- Yun-Chang Koo
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Min Cheol Pyo
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Mi-Hyun Nam
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Chung-Oui Hong
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Sung-Yong Yang
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea.
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Hong CO, Nam MH, Oh JS, Lee JW, Kim CT, Park KW, Lee DH, Lee KW. Pheophorbide a from Capsosiphon fulvescens Inhibits Advanced Glycation End Products Mediated Endothelial Dysfunction. Planta Med 2016; 82:46-57. [PMID: 26308358 DOI: 10.1055/s-0035-1557829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
During hyperglycemia, the first step toward the formation of advanced glycation end products is the nonenzymatic glycation between the carbonyl group of a sugar and the primary amino group of a protein. Advanced glycation end products are then produced through more complex reactions. Reactive oxygen species derived from advanced glycation end products may play a key role in inflammation of the endothelium, leading to the complications seen in diabetes. Glycolaldehyde-induced advanced glycation end products have been reported to express proinflammatory cytokines, such as tumor necrosis factor-α and interleukin-1β. This study focused on Capsosiphon fulvescens, a Capsosiphonaceae type of green algae that has shown potential as a functional food material. Pheophorbide a, an anti-glycation compound, was isolated from C. fulvescens by extraction using a mixture of ethanol and water, followed by column fractionation of the resulting extract. The compound separated from C. fulvescens was identified by means of high-performance liquid chromatography combined with mass spectrometry. Pheophorbide a showed scavenging activity of the intracellular reactive oxygen species as well as monocyte adhesiveness inhibitory activity on the human myelomonocytic cell line (THP-1) and human umbilical vein endothelial cells cocultivation system. The mRNA levels of inflammation-related genes such as monocyte chemoattractant protein-1 and interleukin-6 were significantly decreased by pheophorbide a, and advanced glycation end products-stimulated tumor necrosis factor-α and interleukin-1β were downregulated as well. These results indicate that pheophorbide a has significant reactive oxygen species-scavenging activity, monocyte adhesive inhibitory activity, and downregulatory activity of cytokines related to inflammation affecting the endothelium. Pheophorbide a could therefore be a promising candidate for modulating endothelial cell dysfunction.
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Affiliation(s)
- Chung-Oui Hong
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Mi-Hyun Nam
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Ji-Sun Oh
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Jin-Won Lee
- Department of Food and Biotechnology, College of Science and Engineering, Hankyung National University, Anseong-si, Kyonggi-do, South Korea
| | - Cheong-Tae Kim
- Nong shim Co. 370, Shindaebang-dong, Dongjak-ku, Seoul, South Korea
| | - Kwon-Woo Park
- Division of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Dong-Ho Lee
- Division of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
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Hong CO, Nam MH, Oh JS, Lee JW, Kim CT, Park KW, Lee DH, Lee KW. Erratum for: Pheophorbide a from Capsosiphon fulvescens Inhibits Advanced Glycation End Products Mediated Endothelial Dysfunction. Planta Med 2016; 82:E1. [PMID: 26393934 DOI: 10.1055/s-0035-1558107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Chung-Oui Hong
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Mi-Hyun Nam
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Ji-Sun Oh
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Jin-Won Lee
- Department of Food and Biotechnology, College of Science and Engineering, Hankyung National University, Anseong-si, Kyonggi-do, South Korea
| | - Cheong-Tae Kim
- Nong shim Co. 370, Shindaebang-dong, Dongjak-ku, Seoul, South Korea
| | - Kwon-Woo Park
- Division of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Dong-Ho Lee
- Division of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, South Korea
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Hong YJ, Yang SY, Nam MH, Koo YC, Lee KW. Caffeic Acid Inhibits the Uptake of 2-Amino-1-methyl-6-phenylimidazo[4,5- b]pyridine (PhIP) by Inducing the Efflux Transporters Expression in Caco-2 Cells. Biol Pharm Bull 2015; 38:201-7. [DOI: 10.1248/bpb.b14-00495] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yun-Jin Hong
- Department of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University
| | - Sung-Yong Yang
- Department of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University
| | - Mi-Hyun Nam
- Department of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University
| | - Yun-chang Koo
- Department of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University
| | - Kwang-Won Lee
- Department of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University
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Lee KW, Oh JS, Hong CO, Nam MH. Antidiabetic and antioxidant activity of pheophorbide a from Capsosiphon fulvescens extract in streptozotocin-induced diabetes in rats. Toxicol Lett 2013. [DOI: 10.1016/j.toxlet.2013.05.111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hong YJ, Nam MH, Oh JS, Oh JG, Lee KW. The Effect of Phenolic Compounds on the Transport of 2‐amino‐1‐methyl‐6‐phenylimidazo[4,5‐b]pyridine in Caco‐2 Cell Monolayers. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.988.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yun-Jin Hong
- biotechnologykorea universityseoulKorea, Republic of
| | - Mi-Hyun Nam
- biotechnologykorea universityseoulKorea, Republic of
| | - Ji-Sun Oh
- biotechnologykorea universityseoulKorea, Republic of
| | - Jun-Gu Oh
- biotechnologykorea universityseoulKorea, Republic of
| | - Kwang-Won Lee
- biotechnologykorea universityseoulKorea, Republic of
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Hong ST, Ha YM, Nam MH, Lee KW. Improvement of bioactivity of alpha‐lactalbumin through Maillard reaction with dextran. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.625.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Young-Min Ha
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Mi-Hyun Nam
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Kwang-Won Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
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Yang SY, Hong CO, Koo YC, Nam MH, Lee KW. Protective Effect of Perilla Leaf Extract and its Constituents on t‐BHP‐induced Oxidative Stress in Liver. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.145.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Yun-Chang Koo
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Mi-Hyun Nam
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Kwang-Won Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
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Nam MH, Hong CO, Son DH, Oh JG, Lee KW. Antioxidant, anti‐glycation and ROS scavenging activities of Plantago asiatica. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1050.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mi-Hyun Nam
- BiotechnologyKorea universitySeoulKorea, Republic of
| | | | - Da-Hee Son
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Jun-Gu Oh
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Kwang-Won Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
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Son DH, Nam MH, Hong CO, Chun SH, Kim YB, Lee KW. Antioxidant and skin pores contraction activity of Malus domestica Borkh. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1017.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Da-Hee Son
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Mi-Hyun Nam
- BiotechnologyKorea universitySeoulKorea, Republic of
| | | | - Su-Hyun Chun
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Young-Bu Kim
- R&D CenterIpeeres Ltd.GyeonggidoKorea, Republic of
| | - Kwang-Won Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
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Lee KW, Lee YH, Koo YC, Nam MH, Yang SY, Ha YM, Chun SH. Role of Actinidia Chinensis on suppression of UVA‐mediated oxidative damage In HaCaT cells. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1017.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kwang-Won Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Yan-Houy Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Yun-Chang Koo
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Mi-Hyun Nam
- BiotechnologyKorea universitySeoulKorea, Republic of
| | | | - Young-Min Ha
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Su-hyun Chun
- BiotechnologyKorea universitySeoulKorea, Republic of
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Son DH, Nam MH, Hong CO, Chun SH, Lee SY, Lee KW. Antioxidant and skin pores contraction activity of Vaccinium corymbosum. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1017.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Da-Hee Son
- BiotechnologyKorea universitySeoulKorea, Republic of
| | - Mi-Hyun Nam
- BiotechnologyKorea universitySeoulKorea, Republic of
| | | | - Su-Hyun Chun
- BiotechnologyKorea universitySeoulKorea, Republic of
| | | | - Kwang-Won Lee
- BiotechnologyKorea universitySeoulKorea, Republic of
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Nam MH, Lee HS, Seomun Y, Lee Y, Lee KW. Monocyte-endothelium-smooth muscle cell interaction in co-culture: Proliferation and cytokine productions in response to advanced glycation end products. Biochim Biophys Acta Gen Subj 2011; 1810:907-12. [DOI: 10.1016/j.bbagen.2011.06.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 06/08/2011] [Accepted: 06/09/2011] [Indexed: 02/03/2023]
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Lee HS, Cho HY, Park KW, Kim IH, Kim JT, Nam MH, Lee KW. Inhibitory effects of Terminalia chebula extract on glycation and endothelial cell adhesion. Planta Med 2011; 77:1060-1067. [PMID: 21308613 DOI: 10.1055/s-0030-1270748] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Terminalia chebula Retz. has been used in India for a long time to treat many diseases, and its extract was reported to have antidiabetic activity in vivo. In this study, T. chebula methanolic extract (TCE) containing 2.7 % chebulic acid was evaluated for its preventive effects against the formation of advanced glycation end products (AGEs) and endothelial cell dysfunction. When the effects of TCE on AGE formation and on protein crossing-linking by glycation with D-threose and lens crystallines were examined, TCE showed inhibitory activity in a dose-dependent manner, and the concentration of 1000 µg/mL presented an activity similar to that of 5 mM aminoguanidine as a positive control. Upon investigating the protective activity of TCE against AGE-induced vascular endothelium dysfunction, human umbilical vein endothelial cells (HUVEC) incubated with 100 µg/mL of AGEs had significantly enhanced reactive oxygen species (ROS) formation, whereas the treatment of T. chebula reduced AGE-induced ROS generation. The incubation of HUVEC with 100 µg/mL of AGEs caused a considerable increase in THP-1 monocytic cell adhesion, but this adhesion was reduced by the treatment of TCE. These results suggest that TCE is a potential agent for alleviating diabetic complications.
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Affiliation(s)
- Hyun-Sun Lee
- Department of Food and Nutrition, Institute of Life Resources, Korea University, Seoul, Republic of Korea
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Park HY, Nam MH, Lee HS, Jun W, Hendrich S, Lee KW. Isolation of caffeic acid from Perilla frutescens and its role in enhancing γ-glutamylcysteine synthetase activity and glutathione level. Food Chem 2010. [DOI: 10.1016/j.foodchem.2009.07.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pérez-Hernández O, Nam MH, Gleason ML, Kim HG. Development of a Nested Polymerase Chain Reaction Assay for Detection of Colletotrichum acutatum on Symptomless Strawberry Leaves. Plant Dis 2008; 92:1655-1661. [PMID: 30764297 DOI: 10.1094/pdis-92-12-1655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A nested polymerase chain reaction (PCR) assay was developed for detection of Colletotrichum acutatum on symptomless strawberry leaves. In pure culture, the assay detected as little as 1.0 fg of DNA extracted from mycelium and as few as 1.5 conidia ml-1 when conidial suspensions were sonicated. On detached inoculated leaves, three alternative protocols to dislodge the pathogen were assessed: (i) immersion of whole leaves in 0.05% Tween 20 and manual agitation in plastic bags for 1 min (A); (ii) immersion in Tween 20, sonication for 30 min, then agitation for 1 min (SA); and (iii) freezing for 3 h, incubation for 2 days at 27°C, immersion in Tween 20, then sonication for 30 min and agitation for 1 min (FISA). Each method removed significantly (P ≤ 0.05) more conidia from leaves than the nontreated control; however, removal of appressoria did not vary among assays. In composite samples of noninoculated and inoculated (1.5 ×103 conidia ml-1) strawberry leaves, the nested PCR assay using the FISA protocol detected C. acutatum in as few as 1 infested leaf in 50 noninfested leaves. In a strawberry field, the assay detected the presence of C. acutatum in samples of asymptomatic strawberry leaves, showing potential as a powerful tool for reliable diagnosis of the pathogen in the field.
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Affiliation(s)
| | - M H Nam
- Nonsan Strawberry Experiment Station, Chungnam ARES, Nonsan, 320-862, Korea
| | - M L Gleason
- Department of Plant Pathology, Iowa State University
| | - H G Kim
- Department of Applied Biology, Chungnam National University, Daejeon 305-764, Korea
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Nam MH, Kim TI, Gleason ML, Song JY, Kim HG. First Report of Anthracnose Fruit Rot Caused by Colletotrichum acutatum on Strawberry in Korea. Plant Dis 2008; 92:1247. [PMID: 30769476 DOI: 10.1094/pdis-92-8-1247c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Symptoms typical of anthracnose fruit rot; sunken, dark brown lesions on maturing fruits, were found in a commercial field of strawberry (Fragaria × ananassa) cv. Cal Giant in Yangyang County, Korea in May 2007. Masses of conidia were produced in acervuli in the center of lesions. The fungus was isolated on potato dextrose agar (PDA). Colonies grown on PDA were pale to mouse gray and became dark green to black in reverse. Conidia were formed in orange-to-salmon pink masses in the center of the culture. The average size of conidia on PDA was 15.2 × 4.6 μm, and they were hyaline, straight, cylindrical, with pointed ends, and aseptate (1). The fungus did not form an ascigerous stage in culture. Mycelial growth rate was 7.5 mm per day at 25°C on PDA. The identity of two isolates was confirmed as Colletotrichum acutatum J.H. Simmonds by PCR amplification using species-specific primers TBCA and TB5 (2), resulting in a characteristic 330-bp band on agarose gel. Morphological characters were in accordance with previous reports on C. acutatum. A pathogenicity test was conducted with five healthy plants of cvs. Cal Giant, Maehyang, Seolhyang, Kumhyang, Akihime, and Redpearl. After fruits and flowers were sprayed with a conidia suspension (105 conidia per ml), the plants were maintained at 10 to 25°C and 100% relative humidity in a greenhouse. As a control, five healthy plants were sprayed with sterile distilled water and incubated under the same conditions. Dark brown, water-soaked spots appeared on mature fruits of all cultivars after 5 days, and lesions on green fruits appeared on individual achenes. Flowers developed dark lesions, dried out, and died. No symptoms were found on the control plants. After the pathogen was reisolated from fruits and flowers lesions, the morphological characters developed in culture as described above. To our knowledge, this is the first report of C. acutatum causing strawberry anthracnose in Korea. References: (1) B. J. Smith and L. L. Black. Plant Dis. 74:69, 1990. (2) P. Talhinhas et al. Appl. Environ. Microbiol. 71:2987, 2005.
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Affiliation(s)
- M H Nam
- Nonsan Strawberry Experiment Station, Chungnam ARES, Nonsan 320-862, Korea
| | - T I Kim
- Nonsan Strawberry Experiment Station, Chungnam ARES, Nonsan 320-862, Korea
| | - M L Gleason
- Department of Plant Pathology, Iowa State University, Ames 50011
| | - J Y Song
- Department of Applied Biology, Chungnam National University, Daejeon 305-764, Korea
| | - H G Kim
- Department of Applied Biology, Chungnam National University, Daejeon 305-764, Korea
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Abstract
A rare case of pericardial tamponade developed in a 69-year-old man after a right upper lobectomy for lung cancer. This unusual complication presented in the early postoperative period and was associated with what we believed to be an aberrant right bronchial artery coming off the intrapericardial portion of the aorta. This vessel retracted into the pericardial sac where it bled causing a pericardial tamponade.
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Affiliation(s)
- R H McLean
- Department of Thoracic Surgery, St. Agnes Hospital, Baltimore, Maryland 21229, USA.
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Coe MD, Hamer DH, Levy CS, Milner MR, Nam MH, Barth WF. Gonococcal pericarditis with tamponade in a patient with systemic lupus erythematosus. Arthritis Rheum 1990; 33:1438-41. [PMID: 2403406 DOI: 10.1002/art.1780330919] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Pericarditis is one of the most frequent manifestations of systemic lupus erythematosus; however, purulent pericarditis and tamponade are rare. We describe a patient with systemic lupus erythematosus and culture-proven gonococcal arthritis who developed purulent pericarditis with intracellular gram-negative diplococci. Evidence of tamponade was seen on echocardiography. There has not been a reported case of Neisseria gonorrhoeae in pericardial fluid or tissue since the introduction of antibiotics.
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Affiliation(s)
- M D Coe
- Department of Medicine, Washington Hospital Center, Washington, DC 20010
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Johnson BE, Whang-Peng J, Naylor SL, Zbar B, Brauch H, Lee E, Simmons A, Russell E, Nam MH, Gazdar AF. Retention of chromosome 3 in extrapulmonary small cell cancer shown by molecular and cytogenetic studies. J Natl Cancer Inst 1989; 81:1223-8. [PMID: 2569043 DOI: 10.1093/jnci/81.16.1223] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
In small cell lung carcinoma, one of the short arms of chromosome 3 is typically lost. To investigate chromosome 3 in extrapulmonary small cell carcinoma, we used DNA probes that detect restriction-fragment-length polymorphisms at loci on 3p. These probes were used to study DNA extracted from tumors and normal tissues and/or tumor cell lines from five patients with extrapulmonary small cell cancer. Tumor DNA from four of the five patients with extrapulmonary small cell cancer retained heterozygosity at loci on 3p. Cytogenetic studies of the tumor cell lines established from these four patients showed retention of both short arms of chromosome 3. We conclude that the loss of genetic material from 3p observed in small cell lung cancer is not typical in extrapulmonary small cell cancer.
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Affiliation(s)
- B E Johnson
- National Cancer Institute-Navy Medical Oncology Branch, Bethesda, MD 20814
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Nam MH, Grande JP, Li CY, Kottke BA, Pineda AA, Weiland LH. Familial hypercholesterolemia with unusual foamy histiocytes. Report of a case with myelophthisic anemia and xanthoma of the maxillary sinus. Am J Clin Pathol 1988; 89:556-61. [PMID: 3354509 DOI: 10.1093/ajcp/89.4.556] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Accumulation of phagocytic histiocytes with a foam cell morphology has been described in a number of diseases. Familial hypercholesterolemia, one such disease, is characterized by foamy histiocytic accumulation in cutaneous or tendinous xanthomas and within atheromatous lesions. This report describes a patient with familial hypercholesterolemia who had two unusual manifestations of foamy histiocytic accumulation: a maxillary sinus xanthoma, which presented as an expansile mass, and diffuse bone marrow replacement with foamy histiocytes, which was associated with myelophthisic anemia. The accumulation of foamy cells in both locations resembled that seen in many of the storage diseases. The possibility of foamy histiocytic accumulation should be considered in the differential diagnosis of patients with these disease entities who present with space-occupying lesions.
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Affiliation(s)
- M H Nam
- Department of Laboratory Medicine, Mayo Clinic, Rochester, Minnesota 55905
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