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Singh BK, Biswas R, Basak A, Das AK. Mycobacterial crypto-AcpM as a tool to investigate the consequence of drug binding on its key FAS II partner enzyme HadAB. Biochim Biophys Acta Gen Subj 2021; 1865:129964. [PMID: 34252514 DOI: 10.1016/j.bbagen.2021.129964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 06/20/2021] [Accepted: 07/06/2021] [Indexed: 01/18/2023]
Abstract
Background Mycobacterial FASII pathway is governed by the Protein-Protein Interaction mediated dynamics existent between Acyl Carrier Protein and its partner enzymes. The dehydratase HadAB, involved in the third step of FASII synthesis has remained a key target of drugs like Thiacetazone (TAC) and its consequence on AcpM binding is yet to be deciphered. Owing to the transient nature of these interactions, analysing their implications as a drug target has been exhausting. Methods In this context, we have developed an in vitro method to study the effect of thiocarbamide-containing compounds, TAC and SPA0355 (a thiourea analogue) against mycobacterial HadAB. Additionally, by utilizing crypto-ACP (NBD-tagged Acyl Carrier Protein) as a tool of our choice, we attempted at exploring the effect of TAC and SPA0355 on mycobacterial HadAB. Results SPA0355 behaves at par with TAC and undergoes activation in the presence of monooxygenase EthA thus, bringing about a covalent modification in HadA subunit of HadAB. The crypto-ACP method provides insights into the altered substrate housing capability in HadAB associated with the impediment of its AcpM mediated functionality; an outcome attributed to the repercussions associated with the binding of the aforementioned thiourea compounds. Conclusion This investigation has assisted in unveiling a two-step mechanism undertaken by AcpM for interacting with its corresponding partner protein during acyl chain transfer. General significance This study highlights the alterations brought about by drug binding in the interplay between ACP and HadAB. Additionally, this work for the first time establishes the role of SPA0355 as a promising drug candidate against dehydratase HadAB.
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Affiliation(s)
- Bina K Singh
- School of Biosciences, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Rupam Biswas
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Amit Basak
- School of Biosciences, Indian Institute of Technology Kharagpur, Kharagpur 721302, India; Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Amit K Das
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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Kim JY, Leem J, Hong HL. Protective Effects of SPA0355, a Thiourea Analogue, Against Lipopolysaccharide-Induced Acute Kidney Injury in Mice. Antioxidants (Basel) 2020; 9:antiox9070585. [PMID: 32635491 PMCID: PMC7402186 DOI: 10.3390/antiox9070585] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/30/2020] [Accepted: 07/02/2020] [Indexed: 02/07/2023] Open
Abstract
Inflammation and oxidative stress plays an essential role in the pathophysiology of sepsis-associated acute kidney injury (AKI). SPA0355, a thiourea analogue, has been shown to display beneficial effects against a variety of inflammatory diseases arising from its anti-inflammatory and anti-oxidant properties. However, the potential protective effects of SPA0355 against lipopolysaccharide (LPS)-induced AKI have not been explored. The aim of this study was to evaluate the effects of SPA0355 on LPS-induced AKI and investigate its underlying mechanisms. We found that renal dysfunction and histological abnormalities after LPS injection were significantly ameliorated by SPA0355. The compound also reduced renal expression of tubular injury markers. Mechanistically, SPA0355 significantly suppressed plasma and tissue levels of inflammatory cytokines and immune cell infiltration with inhibition of nuclear factor kappa-B p65 signaling. In addition, elevated levels of 4-hydroxynonenal and malondialdehyde after LPS injection were significantly decreased by SPA0355. The compound also regulated expression of pro-oxidant and antioxidant enzymes after LPS injection. Moreover, SPA0355 attenuated LPS-induced tubular cell apoptosis via inhibition of p53 signaling pathway. Altogether, these results suggest that SPA0355 protects against LPS-induced AKI through suppressing inflammation, oxidative stress, and tubular cell apoptosis and might be a potential preventive option for the disease.
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Affiliation(s)
- Jung-Yeon Kim
- Department of Immunology, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea;
| | - Jaechan Leem
- Department of Immunology, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea;
- Correspondence: (J.L.); (H.-L.H.)
| | - Hyo-Lim Hong
- Department of Internal Medicine, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea
- Correspondence: (J.L.); (H.-L.H.)
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El-Borady OM, Othman MS, Atallah HH, Abdel Moneim AE. Hypoglycemic potential of selenium nanoparticles capped with polyvinyl-pyrrolidone in streptozotocin-induced experimental diabetes in rats. Heliyon 2020; 6:e04045. [PMID: 32509990 PMCID: PMC7264054 DOI: 10.1016/j.heliyon.2020.e04045] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 12/06/2019] [Accepted: 05/19/2020] [Indexed: 01/02/2023] Open
Abstract
This study was aimed to evaluate the efficacy of synthesized selenium nanoparticles (SeNPs) capped with glucose and polyvinyl-pyrrolidone (PVP) on the hyperglycemia and prooxidants/antioxidants imbalance present in model streptozotocin (STZ)-induced diabetic rats. SeNPs were synthesized and characterized. Twenty-four albino male rats were grouped into four different groups. After the rats were induced to have type 2 diabetes by STZ, the SeNPs-treated groups received a dose of 0.5 mg/ml of SeNPs for seven days. Plasma glucose and insulin levels, pancreatic insulin expression, the levels of lipid peroxidation (LPO), nitric oxide (NO), glutathione peroxidase (GPx) and glutathione (GSH) were evaluated. TEM images revealed the formation of semispherical particles with average size between 40 and 50 nm. SeNPs administration successfully reduced the hyperglycemia, raised the levels of insulin in both the pancreas and the plasma and restored the damaged pancreatic tissue. SeNPs also showed enhancement of the elimination of the diabetes-induced oxidative stress injuries by decreasing the pancreatic LPO and NO levels. Furthermore, the activities of the antioxidant enzyme GPx and GSH levels of the diabetic rats were increased. In conclusion, SeNPs capped with PVP could be used in the future as an agent that could manage Diabetes mellitus.
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Affiliation(s)
- Ola M El-Borady
- Institute for Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Mohamed S Othman
- Faculty of Preparatory Year, University of Ha'il, Hail, KSA, Saudi Arabia.,October University for Modern Science and Arts (MSA), Giza, Egypt
| | - Heba H Atallah
- October University for Modern Science and Arts (MSA), Giza, Egypt
| | - Ahmed E Abdel Moneim
- Zoology and Entomology Department, Faculty of Science, Helwan University, Cairo, Egypt
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Kim SH, Zhang Z, Moon YJ, Park IW, Cho YG, Jeon R, Park BH. SPA0355 prevents ovariectomy-induced bone loss in mice. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 23:47-54. [PMID: 30627009 PMCID: PMC6315098 DOI: 10.4196/kjpp.2019.23.1.47] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 11/06/2018] [Accepted: 11/15/2018] [Indexed: 01/30/2023]
Abstract
Estrogen withdrawal in post-menopausal women leads to overactivation of osteoclasts, which contributes to the development of osteoporosis. Inflammatory cytokines are known as one of mechanisms of osteoclast activation after estrogen deficiency. SPA0355 is a thiourea derivative that has been investigated for its antioxidant and anti-inflammatory activities. However, its efficacy in bone resorption has not been previously investigated. The aim of this study was to investigate the impact of SPA0355 on the development of osteoporosis and to explore its mode of action. In vitro experiments showed that SPA0355 inhibited receptor activator of NF-κB ligand (RANKL)-induced osteoclastogenesis in primary bone marrow-derived macrophages. This effect appears to be independent of estrogen receptor activation as ICI 180,782 failed to abrogate its effects on osteoclasts. Further signaling studies revealed that SPA0355 suppressed activation of the MAPKs, Akt, and NF-κB pathways. SPA0355 also increased osteoblastic differentiation, as evidenced by its effects on alkaline phosphatase activity and mineralization nodule formation. Intraperitoneal administration of SPA0355 to ovariectomized mice prevented bone loss, as verified by three-dimensional images and bone morphometric parameters derived from µCT analysis. Noticeably, SPA0355 did not show hepatotoxicity and nephrotoxicity and also had little effect on hematological parameters. Taken together, the results indicate that SPA0355 may protect against bone loss in ovariectomized mice by stimulation of osteoblast differentiation and by inhibition of osteoclast resorption. Therefore, SPA0355 is a safe and potential candidate for management of postmenopausal osteoporosis.
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Affiliation(s)
- Sang Hoon Kim
- Department of Surgery, Chonbuk National University Medical School, Jeonju 54896, Korea
| | - Zhongkai Zhang
- Department of Orthopaedic Surgery, Chonbuk National University Medical School, Jeonju 54896, Korea
| | - Young Jae Moon
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju 54896, Korea
| | - Il Woon Park
- Department of Cognitive Science, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Yong Gon Cho
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju 54896, Korea
| | - Raok Jeon
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Byung-Hyun Park
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju 54896, Korea
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Im YN, Lee YD, Park JS, Kim HK, Im SY, Song HR, Lee HK, Han MK. GPCR Kinase (GRK)-2 Is a Key Negative Regulator of Itch: l-Glutamine Attenuates Itch via a Rapid Induction of GRK2 in an ERK-Dependent Way. J Invest Dermatol 2018. [PMID: 29530536 DOI: 10.1016/j.jid.2018.02.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Many itch mediators activate GPCR and trigger itch via activation of GPCR-mediated signaling pathways. GPCRs are desensitized by GPCR kinases (GRKs). The aim of this study is to explore the role of GRKs in itch response and the link between GRKs and glutamine, an amino acid previously shown to be an itch reliever. Itch responses were evoked by histamine, chloroquine, and dinitrochlorobenzene-induced contact dermatitis (CD). Phosphorylation and protein expression were detected by immunofluorescent staining and Western blotting. GRK2 knockdown using small interfering RNA enhanced itch responses evoked by histamine, chloroquine, and dinitrochlorobenzene-induced CD, whereas GRK2 overexpression using GRK2-expressing adenovirus reduced the itch responses. Glutamine reduced all itch evoked by histamine, chloroquine, and dinitrochlorobenzene-induced CD. Glutamine-mediated inhibition of itch was abolished by GRK2 knockdown. Glutamine application resulted in a rapid and strong expression of GRK2 in not only dinitrochlorobenzene-induced CD (within 10 minutes) but also cultured rat dorsal root ganglion cells, F11 (within 1 minute). ERK inhibitor abrogates glutamine-mediated GRK2 expression and inhibition of itch in dinitrochlorobenzene-induced CD. Our data indicate that GRK2 is a key negative regulator of itch and that glutamine attenuates itch via a rapid induction of GRK2 in an ERK-dependent way.
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Affiliation(s)
- Yu-Na Im
- Department of Immunology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Yu-Dong Lee
- Department of Immunology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Jeong-Soo Park
- Department of Immunology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Hae-Kyoung Kim
- Department of Immunology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Suhn-Young Im
- Department of Biological Sciences, College of Natural Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Hwa-Ryung Song
- Department of Microbiology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Hern-Ku Lee
- Department of Microbiology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea.
| | - Myung-Kwan Han
- Department of Microbiology and Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Republic of Korea.
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Bae UJ, Song MY, Jang HY, Lim JM, Lee SY, Ryu JH, Park BH. Emodin isolated from Rheum palmatum prevents cytokine-induced β-cell damage and the development of type 1 diabetes. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.04.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Polyphenols isolated from Broussonetia kazinoki prevent cytokine-induced β-cell damage and the development of type 1 diabetes. Exp Mol Med 2015; 47:e160. [PMID: 25907110 PMCID: PMC4418042 DOI: 10.1038/emm.2015.16] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 01/04/2015] [Accepted: 01/12/2015] [Indexed: 12/21/2022] Open
Abstract
The axis of nuclear factor κB (NF-κB)-inducible NO synthase (iNOS)-nitric oxide plays a key role in cytokine- and streptozotocin-mediated pancreatic β-cell damage. In this study, we investigated the effects of kazinol C and isokazinol D isolated from Broussonetia kazinoki on the β-cell viability and function. RINm5F cells and primary islets were used for in vitro and ex vivo cytokine toxicity experiments, respectively. For type 1 diabetes induction, mice were injected with multiple low-dose streptozotocin (MLDS). Cytokine-induced toxicity was completely abolished in both RINm5F cells and islets that were pretreated with either kazinol C or isokazinol D. Both kazinols inhibited the NF-κB signaling pathway, thereby inhibiting cytokine-mediated iNOS induction, nitric oxide production, apoptotic cell death and defects in insulin secretion. Moreover, the occurrence of diabetes in MLDS-treated mice was efficiently attenuated in kazinol-pretreated mice. Immunohistochemical analysis revealed that the numbers of terminal deoxynucleotidyl transferase dUTP nick end labeling-positive apoptotic cells and nuclear p65-positive cells were significantly decreased in kazinol-pretreated mice. Our results suggest that kazinol C and isokazinol D block the NF-κB pathway, thus reducing the extent of β-cell damage. Therefore, kazinol C and isokazinol D may have therapeutic value in delaying pancreatic β-cell damage in type 1 diabetes.
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Jang HY, Jeon R, Kang KW, Song MY, Lim JM, Lee E, Ryu JH, Lee SM, Park BH. SPA0355 suppresses T-cell responses and reduces airway inflammation in mice. Eur J Pharmacol 2014; 745:19-28. [PMID: 25446921 DOI: 10.1016/j.ejphar.2014.08.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 08/25/2014] [Accepted: 08/25/2014] [Indexed: 11/17/2022]
Abstract
In recent studies, SPA0355, a thiourea analog, has been demonstrated to possess strong anti-inflammatory activity. However, the mechanisms underlying the effects of SPA0355 on immune-mediated diseases have not been fully defined. The present study was designed to investigate the immunological and molecular mechanisms by which SPA0355 modulates cluster of differentiation of (CD4)(+) T-cell-mediated immune responses in allergic airway inflammation. In vitro studies have shown that SPA0355 suppresses CD4(+) T-cell activation, proliferation, and differentiation via modulation of T-cell receptor (TCR) signal transduction and cytokine-induced Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling. Next, we investigated the efficacy of SPA0355 in ovalbumin (OVA)-induced allergic airway inflammation. Intraperitoneal administration of SPA0355 inhibited inflammatory cell recruitment into the airways as well as the production of Th2 cytokines in bronchoalveolar fluid and suppressed OVA-induced IgE production in serum. Additionally, SPA0355 suppressed mucin production and smooth muscle hypertrophy and prevented the development of airway hyperresponsiveness. Given that allergic airway inflammation is mainly driven by Th2 cell responses, it is highly possible that the defects in CD4(+) T-cell activation and Th2 cell differentiation in the draining lymph nodes and suppressed NF-κB activation in the lungs of SPA0355-treated mice illustrate an immunological mechanism of the preventive effect of SPA0355 on the aforementioned asthmatic characteristics. Collectively, our results suggest that SPA0355 directly modulates Th1 and Th2 responses through the suppression of multiple signaling pathways triggered by TCR or cytokine receptor stimulation, and that SPA0355 has protective effects in a murine model of allergic airway inflammation.
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Affiliation(s)
- Hyun-Young Jang
- Departments of Biochemistry National University Medical School, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Raok Jeon
- College of Pharmacy, Sookmyung Women׳s University, 52 Hyochangwon-gil, Yongsan-gu, Seoul 140-742, Republic of Korea
| | - Kyung-Won Kang
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, Republic of Korea
| | - Mi-Young Song
- Departments of Biochemistry National University Medical School, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Jung Min Lim
- Departments of Anatomy, Chonbuk National University Medical School, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Eun Lee
- College of Pharmacy, Sookmyung Women׳s University, 52 Hyochangwon-gil, Yongsan-gu, Seoul 140-742, Republic of Korea
| | - Jae-Ha Ryu
- College of Pharmacy, Sookmyung Women׳s University, 52 Hyochangwon-gil, Yongsan-gu, Seoul 140-742, Republic of Korea
| | - Sang-Myeong Lee
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, Republic of Korea.
| | - Byung-Hyun Park
- Departments of Biochemistry National University Medical School, Jeonju, Jeonbuk 561-756, Republic of Korea.
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Bae UJ, Yang JD, Ka SO, Koo JH, Woo SJ, Lee YR, Yu HC, Cho BH, Zhao HY, Ryu JH, Lee SM, Jeon R, Park BH. SPA0355 attenuates ischemia/reperfusion-induced liver injury in mice. Exp Mol Med 2014; 46:e109. [PMID: 25104735 PMCID: PMC4150932 DOI: 10.1038/emm.2014.48] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 04/22/2014] [Accepted: 05/19/2014] [Indexed: 01/25/2023] Open
Abstract
Hepatic ischemia/reperfusion (I/R) injury leads to oxidative stress and acute inflammatory responses that cause liver damage and have a considerable impact on the postoperative outcome. Much research has been performed to develop possible protective techniques. We aimed to investigate the efficacy of SPA0355, a synthetic thiourea analog, in an animal model of hepatic I/R injury. Male C57BL/6 mice underwent normothermic partial liver ischemia for 45 min followed by varying periods of reperfusion. The animals were divided into three groups: sham operated, I/R and SPA0355 pretreated. Pretreatment with SPA0355 protected against hepatic I/R injury, as indicated by the decreased levels of serum aminotransferase and reduced parenchymal necrosis and apoptosis. Liver synthetic function was also restored by SPA0355 as reflected by the prolonged prothrombin time. To gain insight into the mechanism involved in this protection, we measured the activity of nuclear factor-κB (NF-κB), which revealed that SPA0355 suppressed the nuclear translocation and DNA binding of NF-κB subunits. Concomitantly, the expression of NF-κB target genes such as IL-1β, IL-6, TNF-α and iNOS was significantly downregulated. Lastly, the liver antioxidant enzymes superoxide dismutase, catalase and glutathione were upregulated by SPA0355 treatment, which correlated with the reduction in serum malondialdehyde. Our results suggest that SPA0355 pretreatment prior to I/R injury could be an effective method to reduce liver damage.
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Affiliation(s)
- Ui-Jin Bae
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Jae Do Yang
- Department of Surgery, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Sun-O Ka
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Jeung-Hyun Koo
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Seong Ji Woo
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Young-Rae Lee
- Department of Oral Biochemistry, Wonkwang University, Jeonbuk, Republic of Korea
| | - Hee Chul Yu
- Department of Surgery, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Baik Hwan Cho
- Department of Surgery, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Hui-Yuan Zhao
- College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea
| | - Jae-Ha Ryu
- College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea
| | - Sang-Myeong Lee
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Jeonbuk, Republic of Korea
| | - Raok Jeon
- College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea
| | - Byung-Hyun Park
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
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Song MY, Bae UJ, Jang KY, Park BH. Transplantation of betacellulin-transduced islets improves glucose intolerance in diabetic mice. Exp Mol Med 2014; 46:e98. [PMID: 24875130 PMCID: PMC4044676 DOI: 10.1038/emm.2014.24] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 01/14/2014] [Accepted: 01/23/2014] [Indexed: 01/09/2023] Open
Abstract
Type 1 diabetes is an autoimmune disease caused by permanent destruction of insulin-producing pancreatic β cells and requires lifelong exogenous insulin therapy. Recently, islet transplantation has been developed, and although there have been significant advances, this approach is not widely used clinically due to the poor survival rate of the engrafted islets. We hypothesized that improving survival of engrafted islets through ex vivo genetic engineering could be a novel strategy for successful islet transplantation. We transduced islets with adenoviruses expressing betacellulin, an epidermal growth factor receptor ligand, which promotes β-cell growth and differentiation, and transplanted these islets under the renal capsule of streptozotocin-induced diabetic mice. Transplantation with betacellulin-transduced islets resulted in prolonged normoglycemia and improved glucose tolerance compared with those of control virus-transduced islets. In addition, increased microvascular density was evident in the implanted islets, concomitant with increased endothelial von Willebrand factor immunoreactivity. Finally, cultured islets transduced with betacellulin displayed increased proliferation, reduced apoptosis and enhanced glucose-stimulated insulin secretion in the presence of cytokines. These experiments suggest that transplantation with betacellulin-transduced islets extends islet survival and preserves functional islet mass, leading to a therapeutic benefit in type 1 diabetes.
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Affiliation(s)
- Mi-Young Song
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Ui-Jin Bae
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Kyu Yun Jang
- Department of Pathology, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
| | - Byung-Hyun Park
- Department of Biochemistry, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
- Research Institute for Endocrine Sciences, Chonbuk National University Medical School, Jeonbuk, Republic of Korea
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