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Hou SJ, Huang YR, Zhu J, Jia YB, Niu XY, Yang JJ, Yu XL, Du XY, Liang SY, Cui F, Li LJ, Tian C, Liu RT. Mouse serum albumin induces neuronal apoptosis and tauopathies. Acta Neuropathol Commun 2024; 12:66. [PMID: 38654316 PMCID: PMC11040793 DOI: 10.1186/s40478-024-01771-6] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/31/2024] [Indexed: 04/25/2024] Open
Abstract
The elderly frequently present impaired blood-brain barrier which is closely associated with various neurodegenerative diseases. However, how the albumin, the most abundant protein in the plasma, leaking through the disrupted BBB, contributes to the neuropathology remains poorly understood. We here demonstrated that mouse serum albumin-activated microglia induced astrocytes to A1 phenotype to remarkably increase levels of Elovl1, an astrocytic synthase for very long-chain saturated fatty acids, significantly promoting VLSFAs secretion and causing neuronal lippoapoptosis through endoplasmic reticulum stress response pathway. Moreover, MSA-activated microglia triggered remarkable tau phosphorylation at multiple sites through NLRP3 inflammasome pathway. Intracerebroventricular injection of MSA into the brains of C57BL/6J mice to a similar concentration as in patient brains induced neuronal apoptosis, neuroinflammation, increased tau phosphorylation, and decreased the spatial learning and memory abilities, while Elovl1 knockdown significantly prevented the deleterious effect of MSA. Overall, our study here revealed that MSA induced tau phosphorylation and neuron apoptosis based on MSA-activated microglia and astrocytes, respectively, showing the critical roles of MSA in initiating the occurrence of tauopathies and cognitive decline, and providing potential therapeutic targets for MSA-induced neuropathology in multiple neurodegenerative disorders.
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Affiliation(s)
- Sheng-Jie Hou
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ya-Ru Huang
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
| | - Jie Zhu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ying-Bo Jia
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
| | - Xiao-Yun Niu
- Ningxia University, Yinchuan, 750021, Ningxia, China
| | - Jin-Ju Yang
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
| | - Xiao-Lin Yu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
| | - Xiao-Yu Du
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shi-Yu Liang
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fang Cui
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ling-Jie Li
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chen Tian
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Rui-Tian Liu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Haidian District, Beijing, 100190, China.
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Vukelić D, Baralić K, Marić Đ, Đukic-Ćosić D, Bulat Z, Panieri E, Saso L, Djordjevic AB. Hepato-renal toxicity of low dose metal(oid)s mixture in real-life risk simulation in rats: Effects on Nrf2/HO-1 signalling and redox status. Sci Total Environ 2024; 908:168352. [PMID: 37952665 DOI: 10.1016/j.scitotenv.2023.168352] [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] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
The understanding that humans are exposed to a low level of toxic metals and metalloids in their lifetime has resulted in a shift in scientific and regulatory perspectives from the traditional evaluation of single metal toxicity to complex mixtures, relevant to real-life exposure. Therefore, the aim of this study was to examine the impact of real-life, 90-days exposure to mixture of toxic metal(oid)s, Cd, Pb, Ni, Cr, As and Hg, on the nuclear factor erythroid 2-related factor 2 and hemoxygenase-1 (Nrf2/HO-1) signalling and redox status by assessing total sulfhydryl groups (SH), glutathione (GSH), superoxide dismutase activity (SOD), malondialdehyde (MDA), and ischemia modified albumin (IMA) in the liver and kidney of Wistar rats. Animals (20 males and 20 females) were randomized in 2 control and 6 treated groups that received by oral gavage mixture of metal(oid)s solutions in doses that reflect blood metal(oid) levels determined in previous human biomonitoring study as benchmark dose (F/M _BMD), median (F/M _MED), and 95th percentile (F/M _95). Our results have shown that metal(oid)s mixture impaired the activation of the Nrf2/HO-1 pathway in the kidney and liver of male rats and kidney of female rats, followed by depletion of GSH levels in males. Additionally, in males elevated levels of IMA in the liver were observed, while in both genders increased MDA levels were observed in the kidney. Interestingly, the effects were more pronounced in male than in female rats. This study is among the first that examined hepato-renal toxic mechanisms of real-life metal mixture exposure, while our results might be of immense importance for assessing the risk of exposure to mixtures of toxic substances.
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Affiliation(s)
- Dragana Vukelić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221 Belgrade, Serbia
| | - Katarina Baralić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221 Belgrade, Serbia
| | - Đurđica Marić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221 Belgrade, Serbia.
| | - Danijela Đukic-Ćosić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221 Belgrade, Serbia
| | - Zorica Bulat
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221 Belgrade, Serbia
| | - Emiliano Panieri
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, 00185 Rome, Italy; Department of General Direction (DG), Section of Hazardous Substances, Environmental Education and Training for the Technical Coordination of Management Activities (DGTEC), Italian Institute for the Environmental Protection and Research, Rome, Italy
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, 00185 Rome, Italy
| | - Aleksandra Buha Djordjevic
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221 Belgrade, Serbia
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Sarman E, Gulle K, Ilhan I. Histochemical, Immunohistochemical, and Biochemical Investigation of the Effect of Resveratrol on Testicular Damage Caused by Methotrexate (MTX). Reprod Sci 2023; 30:3315-3324. [PMID: 37268870 DOI: 10.1007/s43032-023-01269-x] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/09/2023] [Indexed: 06/04/2023]
Abstract
Cancer is one of the world's major causes of death. The aim of this study is to examine the acute effects of resveratrol on testicular toxicity, oxidative stress, and apoptosis caused by MTX, which is widely used in the treatment of many diseases, especially cancer, histochemically, immunohistochemically, and biochemical methods using different parameters. A total of 32 Wistar albino male rats were randomly divided into 4 groups: control, resveratrol (RES), MTX, and MTX + RES, with 8 animals in each group. At the end of the experiment, tissue and blood samples were taken, and histochemical, immunohistochemical, and biochemical parameters were examined. In this study, where parameters were compared for the first time, total thiol (TT) and native thiol (NT) are the highest in the RES group, disulfide (DS), and ischemia-modified albumin (IMA) are the highest in the MTX group. Total oxidant status (TOS) and oxidative stress index (OSI) are the highest in the MTX group, and total antioxidant status (TAS) is the highest in the RES group. Separation and deterioration in the tunica albuginea, congestion and edema in the interstitial region, vacuolization in the seminiferous epithelium, and spermatogenic serial cells spilling into the lumen without completing their maturation were observed. When examined in terms of histochemical, immunohistochemical, and biochemical examinations, our study revealed that resveratrol has positive effects on methotrexate-induced acute testicular damage, oxidative stress, and apoptosis.
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Affiliation(s)
- Emine Sarman
- Department of Histology and Embryology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Campus, 03030, Afyonkarahisar, Turkey.
| | - Kanat Gulle
- Department of Histology and Embryology, Faculty of Medicine, Suleyman Demirel University, Campus, 32260, Isparta, Turkey
| | - Ilter Ilhan
- Department of Biochemistry, Faculty of Medicine, Suleyman Demirel University, Campus, 32260, Isparta, Turkey
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Tepebaşi MY, Aşci H, Coşan S, Sevük MA, Karakuyu NF, Özmen Ö. Irbesartan has a curative effect on lipopolysaccharide-induced cardiotoxicity by antioxidant and antiapoptotic pathways. Rev Port Cardiol 2023; 42:895-903. [PMID: 37385588 DOI: 10.1016/j.repc.2023.03.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 07/01/2023] Open
Abstract
INTRODUCTION AND OBJECTIVE Lipopolysaccharide (LPS) has been associated with myocardial inflammation, oxidative stress, apoptosis, and cardiac dysfunction, as well as death by causing sepsis. In this study, we investigated the effect of irbesartan (IRB), an angiotensin receptor antagonist, on cardiotoxicity caused by LPS. METHODS The experiment involved 24 Wistar albino rats divided into three groups of eight: control, LPS (5 mg/kg), and LPS (5 mg/kg)+IRB (3 mg/kg). Parameters including total oxidative status, total antioxidant status, oxidative stress index, and ischemia-modified albumin were measured to assess oxidative stress in heart tissues and serum. Serum CK, CK-MB, and LDH levels were measured spectrophotometrically. RT-qPCR was used to detect the mRNA expression levels of Bcl-2, BAX, p53, caspase-3, and sirtuin 1. Tissues taken from the heart and aorta were examined by immunohistochemistry and histopathology. RESULTS While there was an increase in the parameters indicating heart damage, oxidative stress, and apoptosis in the group given LPS, there was an improvement in all parameters and heart damage in the group treated with IRB. CONCLUSION As a result of our study, we determined that IRB has an ameliorating effect on myocardial damage caused by oxidative stress and apoptosis developed by the LPS-induced sepsis model.
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Affiliation(s)
| | - Halil Aşci
- Department of Medical Pharmacology, University of Süleyman Demirel, Isparta, TR, Turkey
| | - Samet Coşan
- Department of Medical Pharmacology, University of Süleyman Demirel, Isparta, TR, Turkey
| | | | - Nasıf Fatih Karakuyu
- Department of Medical Pharmacology, University of Süleyman Demirel, Isparta, TR, Turkey
| | - Özlem Özmen
- Department of Pathology, University of Mehmet Akif Ersoy, Burdur, TR, Turkey
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Preininger MK, Zaytseva D, Lin JM, Kaufer D. Blood-brain barrier dysfunction promotes astrocyte senescence through albumin-induced TGFβ signaling activation. Aging Cell 2023; 22:e13747. [PMID: 36606305 PMCID: PMC9924950 DOI: 10.1111/acel.13747] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 08/22/2022] [Accepted: 11/06/2022] [Indexed: 01/07/2023] Open
Abstract
Blood-brain barrier dysfunction (BBBD) and accumulation of senescent astrocytes occur during brain aging and contribute to neuroinflammation and disease. Here, we explored the relationship between these two age-related events, hypothesizing that chronic hippocampal exposure to the blood-borne protein serum albumin could induce stress-induced premature senescence (SIPS) in astrocytes via transforming growth factor beta 1 (TGFβ) signaling. We found that 1 week of albumin exposure significantly increased TGFβ signaling and senescence marker expression in cultured rat hippocampal astrocytes. These changes were preventable by pharmacological inhibition of the type I TGFβ receptor (TGFβR) ALK5. To study these effects in vivo, we utilized an animal model of BBBD in which albumin was continuously infused into the lateral ventricles of adult mice. Consistent with our in vitro results, 1 week of albumin infusion significantly increased TGFβ signaling activation and the burden of senescent astrocytes in hippocampal tissue. Pharmacological inhibition of ALK5 TGFβR or conditional genetic knockdown of astrocytic TGFβR prior to albumin infusion was sufficient to prevent albumin-induced astrocyte senescence. Together, these results establish a link between TGFβ signaling activation and astrocyte senescence and suggest that prolonged exposure to serum albumin due to BBBD can trigger these phenotypic changes.
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Affiliation(s)
- Marcela K. Preininger
- Department of Integrative BiologyUniversity of California, BerkeleyBerkeleyCaliforniaUSA
- Department of Molecular and Cell BiologyUniversity of California, BerkeleyBerkeleyCaliforniaUSA
| | - Dasha Zaytseva
- Department of Integrative BiologyUniversity of California, BerkeleyBerkeleyCaliforniaUSA
- Department of BiologySan Francisco State UniversitySan FranciscoCaliforniaUSA
| | - Jessica May Lin
- Department of Integrative BiologyUniversity of California, BerkeleyBerkeleyCaliforniaUSA
| | - Daniela Kaufer
- Department of Integrative BiologyUniversity of California, BerkeleyBerkeleyCaliforniaUSA
- Helen Wills Neuroscience InstituteUniversity of California, BerkeleyBerkeleyCaliforniaUSA
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Lievykh A, Zhyliuk V, Ushakova G, Tkachenko V, Kovalchuk Y, Dovban O, Kharchenko Y, Shevtsova A. Impact of Vitamin D3 on Carbonyl-Oxidative Stress and Matrix Metalloproteinases after Acute Intracerebral Hemorrhage in Rats with Type 2 Diabetes Mellitus. Endocr Metab Immune Disord Drug Targets 2023; 23:1326-1339. [PMID: 36944619 DOI: 10.2174/1871530323666230321100534] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 01/05/2023] [Accepted: 01/11/2023] [Indexed: 03/23/2023]
Abstract
INTRODUCTION Diabetes mellitus is associated with the development of carbonyl-oxidative stress (COS) and an increased risk of a cerebral hemorrhage. Vitamin D3 is considered an additional drug to have an impact on COS and proteolysis in the extracellular matrix. OBJECTIVE The study aimed to evaluate the impact of D3 on the COS-markers and matrix metalloproteinases MMP2/MMP9 activity after acute intracerebral hemorrhage (ICH) in rats with experimental type 2 diabetes mellitus (Т2DM) compared to metformin (Met). METHODS T2DM was induced in rats via the intraperitoneal injection of streptozotocin (STZ) and nicotinamide (NA), ICH - by microinjection of bacterial collagenase into the striatum. Rats were randomized into five groups: 1 - intact animals (n = 8), 2 - T2DM (n = 9); 3 - T2DM+ICH (n = 7); 4 - T2DM+ICH+Met (n = 7); 5 - T2DM+ICH+D3 (n = 7). Blood glucose, glycated hemoglobin, and oral glucose tolerance test (OGTT) were assessed using commercial kits. Advanced oxidation protein products (AOPP), protein carbonyls (PC370/430), and ischemia-modified albumin (IMA) were measured by spectrophotometry, advanced glycation end products (AGEs) by quantitative fluorescence, and matrix metalloproteinases MMP2/9 by gelatin zymography. RESULTS D3 does not significantly affect the glucose level and OGTT in rats with T2DM+ICH. However, it reduces AOPP, PC, and AGEs, thus reducing the COS index. In contrast, the activity of proMMP9 increases after D3 administration. These effects of D3 have been reported to be stronger and sometimes opposite to those of metformin. CONCLUSION D3 supplementation may decrease the negative consequences of a cerebral hemorrhage in T2DM by reducing COS and preventing the accumulation of COS-modified proteins in the brain by regulating the expression and activity of MMP9.
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Affiliation(s)
- Anton Lievykh
- Department of Pharmacology, Dnipro State Medical University, 9 Vernadskogo Str., Dnipro, 49044, Ukraine
| | - Volodymyr Zhyliuk
- Department of Pharmacology, Dnipro State Medical University, 9 Vernadskogo Str., Dnipro, 49044, Ukraine
| | - Galyna Ushakova
- Department of Biochemistry and Physiology, Oles Honchar Dnipro National University, 72 Gagarina Ave, Dnipro, 49010, Ukraine
| | - Victoriia Tkachenko
- Department of Pharmacology, Dnipro State Medical University, 9 Vernadskogo Str., Dnipro, 49044, Ukraine
| | - Yuliia Kovalchuk
- Department of Biochemistry and Physiology, Oles Honchar Dnipro National University, 72 Gagarina Ave, Dnipro, 49010, Ukraine
| | - Olena Dovban
- Department of Biochemistry and Physiology, Oles Honchar Dnipro National University, 72 Gagarina Ave, Dnipro, 49010, Ukraine
| | - Yuliia Kharchenko
- Department of Pharmacology, Dnipro State Medical University, 9 Vernadskogo Str., Dnipro, 49044, Ukraine
| | - Alla Shevtsova
- Department of Pharmacology, Dnipro State Medical University, 9 Vernadskogo Str., Dnipro, 49044, Ukraine
- Department of Biochemistry and Physiology, Oles Honchar Dnipro National University, 72 Gagarina Ave, Dnipro, 49010, Ukraine
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Acar M, Sayhan Kaplan H, Erdem AF, Tomak Y, Turan G, Özdin M. Effects of dexmedetomidine on new oxidative stress markers on renal ischaemia-reperfusion injury in rats: thiol/disulphide homeostasis and the ischaemia-modified albumin. Arch Physiol Biochem 2022; 128:1115-1120. [PMID: 32401057 DOI: 10.1080/13813455.2020.1754431] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES This study investigated the effect of dexmedetomidine on the oxidant-antioxidant (thiol/disulphide) balance. METHODS A total of 24 rats were divided into four groups. The renal arteries in groups IR (ischaemia/reperfusion) and IR + D (ischaemia/reperfusion + dexmedetomidine) were clamped for 45 min and reperfused for 180 min. Groups D (Dexmedetomidine) and IR + D were administered 100 μg/kg dexmedetomidine. Oxidant-antioxidant (thiol/disulphide) levels were measured. Kidney tissue was examined histopathologically. RESULTS No statistically difference was found between the groups in terms of thiol-disulphide averages, while IMA, TOS and thiol-disulphide results showed a minimal decrease in Group IR + D compared to Group IR (p > 0.05). Tubular lesions and necrosis were found in 26-50% of tubules in Group IR. Tubular damage and necrosis in Group IR + D declined to 5-25% . CONCLUSIONS No statistically difference was found in the study where OSI index, thiol/disulphide balance and IMA were measured together as biochemical values.
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Affiliation(s)
- Müberra Acar
- Department of Anesthesiology and Reanimation, Ağrı State Hospital, Ağrı, Turkey
| | - Havva Sayhan Kaplan
- Department of Anesthesiology and Reanimation, Van Yuzuncu Yil University, Van, Turkey
| | - Ali F Erdem
- Department of Anaesthesiology and Reanimation, Sakarya University, Sakarya, Turkey
| | - Yakup Tomak
- Department of Anaesthesiology and Reanimation, Sakarya University, Sakarya, Turkey
| | - Gupse Turan
- Department of Pathology, Sakarya University, Sakarya, Turkey
| | - Mehmet Özdin
- Department of Biochemistry, Sakarya University, Sakarya, Turkey
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Xie XF, Xie BY, Zhang WH, Hou JH, Liu DL, Zhang L, Xu LX, Li ZL, Li RZ, Ye ZM. The efficacy and safety of tacrolimus and entecavir combination therapy in the treatment of hepatitis B virus-associated glomerulonephritis: a multi-center, placebo controlled, and single-blind randomized trial. Ann Palliat Med 2022; 11:1762-1773. [PMID: 35672893 DOI: 10.21037/apm-22-328] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/18/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND The proteinuria remission in hepatitis B virus-associated glomerulonephritis (HBV-GN) patients with massive proteinuria treated with antiviral therapy was low. Tacrolimus (TAC) is effective in primary nephropathy and can inhibit HBV infection by inhibiting HBV binding to sodium taurocholate cotransporting polypeptide on liver cells. This study evaluated the efficacy and safety of TAC combined with ETV compared with entecavir (ETV) monotherapy in HBV-GN. METHODS Patients diagnosed with HBV-GN were recruited for this prospective, randomized, controlled, multicenter, single-blinded study in China. Patients were given TAC and ETV therapy (the TAC+ETV group) or placebo and ETV therapy (the ETV group) for 26 weeks. The efficacy endpoints included proteinuria remission, including complete and partial remission (CR and PR), the change of 24-hour proteinuria (24 h UP) and HBV DNA titer. The safety endpoints were the incidence of HBV virologic breakthrough and adverse events. RESULTS There were 14 patients in the TAC+ETV group and 17 patients in the ETV group. In the intention-to-treat analyses, 64.3% (9/14) of patients in the TAC+ETV group and 58.8% (10/17) in the ETV group achieved PR or CR at 26 weeks (P=0.38). At week 14, 42.9% (6/14) and 41.2% (7/17) of patients in the TAC+ETV group and the ETV group, respectively, achieved PR or CR (P=0.23). At week 26, the 24 h UP had decreased by 2.63±6.33 g from baseline in the TAC+ETV group and 1.42±4.34 g in the ETV group (P=0.55). The serum albumin increased by 11.1±7.30 g/L from baseline in the TAC+ETV group and 3.81±5.09 g/L in the ETV group (P<0.001). Log10 HBV DNA decreased by 1.49±2.04 from baseline in the TAC+ETV group and 2.47±2.08 in the ETV group (P=0.37); 28.6% (4/14) patients had HBV DNA virologic breakthrough in the ETV group, while none in the TAC+ETV group (P=0.29). CONCLUSIONS In adult HBV-GN patients, TAC and ETV combination therapy may significantly improve serum albumin levels without increasing the risk of HBV reactivation compared with entecavir monotherapy. TRIAL REGISTRATION ClinicalTrials.gov Identifier NCT03062813.
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Affiliation(s)
- Xin-Fu Xie
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Bing-Ying Xie
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Shantou University Medical College, Shantou, China
| | - Wen-Hao Zhang
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Shantou University Medical College, Shantou, China
| | - Ji-Hua Hou
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China; Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Ding-Lin Liu
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; School of Medicine, South China University of Technology, Guangzhou, China
| | - Li Zhang
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Li-Xia Xu
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhi-Lian Li
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Rui-Zhao Li
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhi-Ming Ye
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Department of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
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Hirota C, Takashina Y, Yoshino Y, Hasegawa H, Okamoto E, Matsunaga T, Ikari A. Reactive Oxygen Species Downregulate Transient Receptor Potential Melastatin 6 Expression Mediated by the Elevation of miR-24-3p in Renal Tubular Epithelial Cells. Cells 2021; 10:cells10081893. [PMID: 34440664 PMCID: PMC8393788 DOI: 10.3390/cells10081893] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 07/24/2021] [Accepted: 07/24/2021] [Indexed: 11/19/2022] Open
Abstract
Background: A low level of serum magnesium ion (Mg2+) is associated with type 2 diabetes mellitus (T2D). However, the molecular mechanism of Mg2+ deficiency has not been fully clarified. The current study sought to assesses the effect of reactive oxygen species on the expression of Mg2+ channels and miRNA. Methods: The expression of Mg2+ channels and miRNA were examined by real-time polymerase chain reaction. Intracellular Mg2+ concentration was measured by Magnesium Green fluorescence measurement. Results: The mRNA level of transient receptor potential melastatin 6 (TRPM6), which functions as Mg2+ influx channel in the distal convoluted tubule (DCT) of the kidney, was decreased by glycated albumin (GA), but not by insulin in rat renal tubule-derived NRK-52E cells. The mRNA levels of TRPM7, a homologue of TRPM6, and CNNM2, a Mg2+ efflux transporter located at the basolateral membrane of DCT, were changed by neither GA nor insulin. The generation of reactive oxygen species (ROS) was increased by GA. Hydrogen peroxide (H2O2) dose-dependently decreased TRPM6 mRNA, but it inversely increased the reporter activity of TRPM6. H2O2 accelerated the degradation of TRPM6 mRNA in actinomycin D assay without affecting TRPM7 and CNNM2 mRNA expressions. Nine miRNAs were considered as candidates for the regulator of stability of TRPM6 mRNA. Among them, miR-24-3p expression was increased by H2O2. The H2O2-induced reduction of TRPM6 mRNA was rescued by miR-24-3p siRNA. Magnesium Green fluorescence measurement showed that Mg2+ influx is suppressed by H2O2, which was rescued by an antioxidant and miR-24-3p siRNA. Conclusions: We suggest that GA decreases TRPM6 expression mediated by the elevation of ROS and miR-24-3p in renal tubular epithelial cells of T2D.
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Affiliation(s)
- Chieko Hirota
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (C.H.); (Y.T.); (Y.Y.); (E.O.)
| | - Yui Takashina
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (C.H.); (Y.T.); (Y.Y.); (E.O.)
| | - Yuta Yoshino
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (C.H.); (Y.T.); (Y.Y.); (E.O.)
| | - Hajime Hasegawa
- Saitama Medical Center, Department of Nephrology and Hypertension, Saitama Medical University, Saitama 350-8550, Japan;
| | - Ema Okamoto
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (C.H.); (Y.T.); (Y.Y.); (E.O.)
| | - Toshiyuki Matsunaga
- Education Center of Green Pharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 502-8585, Japan;
| | - Akira Ikari
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (C.H.); (Y.T.); (Y.Y.); (E.O.)
- Correspondence: ; Tel./Fax: +81-58-230-8124
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10
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Yuba E, Budina E, Katsumata K, Ishihara A, Mansurov A, Alpar AT, Watkins EA, Hosseinchi P, Reda JW, Lauterbach AL, Nguyen M, Solanki A, Kageyama T, Swartz MA, Ishihara J, Hubbell JA. Suppression of Rheumatoid Arthritis by Enhanced Lymph Node Trafficking of Engineered Interleukin-10 in Murine Models. Arthritis Rheumatol 2021; 73:769-778. [PMID: 33169522 DOI: 10.1002/art.41585] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 10/13/2020] [Accepted: 11/05/2020] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Rheumatoid arthritis (RA) is a major autoimmune disease that causes synovitis and joint damage. Although clinical trials have been performed using interleukin-10 (IL-10), an antiinflammatory cytokine, as a potential treatment of RA, the therapeutic effects of IL-10 have been limited, potentially due to insufficient residence in lymphoid organs, where antigen recognition primarily occurs. This study was undertaken to engineer an IL-10-serum albumin (SA) fusion protein and evaluate its effects in 2 murine models of RA. METHODS SA-fused IL-10 (SA-IL-10) was recombinantly expressed. Mice with collagen antibody-induced arthritis (n = 4-7 per group) or collagen-induced arthritis (n = 9-15 per group) were injected intravenously with wild-type IL-10 or SA-IL-10, and the retention of SA-IL-10 in the lymph nodes (LNs), immune cell composition in the paws, and therapeutic effect of SA-IL-10 on mice with arthritis were assessed. RESULTS SA fusion to IL-10 led to enhanced accumulation in the mouse LNs compared with unmodified IL-10. Intravenous SA-IL-10 treatment restored immune cell composition in the paws to a normal status, elevated the frequency of suppressive alternatively activated macrophages, reduced IL-17A levels in the paw-draining LN, and protected joint morphology. Intravenous SA-IL-10 treatment showed similar efficacy as treatment with an anti-tumor necrosis factor antibody. SA-IL-10 was equally effective when administered intravenously, locally, or subcutaneously, which is a benefit for clinical translation of this molecule. CONCLUSION SA fusion to IL-10 is a simple but effective engineering strategy for RA therapy and has potential for clinical translation.
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Affiliation(s)
- Eiji Yuba
- University of Chicago, Chicago, Illinois, and Osaka Prefecture University, Osaka, Japan
| | | | | | | | | | | | | | | | | | | | | | - Ani Solanki
- University of Chicago, Chicago, Illinois, USA
| | | | | | - Jun Ishihara
- University of Chicago, Chicago, Illinois, and Imperial College London, London, UK
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11
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Nolan LM, McCaughey LC, Merjane J, Turnbull L, Whitchurch CB. ChpC controls twitching motility-mediated expansion of Pseudomonas aeruginosa biofilms in response to serum albumin, mucin and oligopeptides. Microbiology (Reading) 2020; 166:669-678. [PMID: 32478653 PMCID: PMC7657506 DOI: 10.1099/mic.0.000911] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 03/18/2020] [Indexed: 12/31/2022]
Abstract
Twitching motility-mediated biofilm expansion occurs via coordinated, multi-cellular collective behaviour to allow bacteria to actively expand across surfaces. Type-IV pili (T4P) are cell-associated virulence factors which mediate twitching motility via rounds of extension, surface attachment and retraction. The Chp chemosensory system is thought to respond to environmental signals to regulate the biogenesis, assembly and twitching motility function of T4P. In other well characterised chemosensory systems, methyl-accepting chemotaxis proteins (MCPs) feed environmental signals through a CheW adapter protein to the histidine kinase CheA to modulate motility. The Pseudomonas aeruginosa Chp system has an MCP PilJ and two CheW adapter proteins, PilI and ChpC, that likely interact with the histidine kinase ChpA to feed environmental signals into the system. In the current study we show that ChpC is involved in the response to host-derived signals serum albumin, mucin and oligopeptides. We demonstrate that these signals stimulate an increase in twitching motility, as well as in levels of 3'-5'-cyclic adenosine monophosphate (cAMP) and surface-assembled T4P. Interestingly, our data shows that changes in cAMP and surface piliation levels are independent of ChpC but that the twitching motility response to these environmental signals requires ChpC. Furthermore, we show that protease activity is required for the twitching motility response of P. aeruginosa to environmental signals. Based upon our data we propose a model whereby ChpC feeds these environmental signals into the Chp system, potentially via PilJ or another MCP, to control twitching motility. PilJ and PilI then modulate T4P surface levels to allow the cell to continue to undergo twitching motility. Our study is the first to link environmental signals to the Chp chemosensory system and refines our understanding of how this system controls twitching motility-mediated biofilm expansion in P. aeruginosa.
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Affiliation(s)
- Laura M. Nolan
- The ithree institute, University of Technology Sydney, Ultimo 2007, New South Wales, Australia
- National Heart and Lung Institute, Imperial College London, London SW3 6LR, UK
| | - Laura C. McCaughey
- The ithree institute, University of Technology Sydney, Ultimo 2007, New South Wales, Australia
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Jessica Merjane
- The ithree institute, University of Technology Sydney, Ultimo 2007, New South Wales, Australia
| | - Lynne Turnbull
- The ithree institute, University of Technology Sydney, Ultimo 2007, New South Wales, Australia
| | - Cynthia B. Whitchurch
- The ithree institute, University of Technology Sydney, Ultimo 2007, New South Wales, Australia
- Microbes in the Food Chain Programme, Quadram Institute Bioscience, Norwich Research Park, NR4 7UQ and School of Biological Sciences, University of East Anglia, NR4 7TJ, Norwich, UK
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12
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Read C, Yang P, Kuc RE, Nyimanu D, Williams TL, Glen RC, Holt LJ, Arulanantham H, Smart A, Davenport AP, Maguire JJ. Apelin peptides linked to anti-serum albumin domain antibodies retain affinity in vitro and are efficacious receptor agonists in vivo. Basic Clin Pharmacol Toxicol 2020; 126 Suppl 6:96-103. [PMID: 30901161 DOI: 10.1111/bcpt.13227] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 02/04/2019] [Accepted: 03/14/2019] [Indexed: 12/18/2022]
Abstract
The apelin receptor is a potential target in the treatment of heart failure and pulmonary arterial hypertension where levels of endogenous apelin peptides are reduced but significant receptor levels remain. Our aim was to characterise the pharmacology of a modified peptide agonist, MM202, designed to have high affinity for the apelin receptor and resistance to peptidase degradation and linked to an anti-serum albumin domain antibody (AlbudAb) to extend half-life in the blood. In competition, binding experiments in human heart MM202-AlbudAb (pKi = 9.39 ± 0.09) bound with similar high affinity as the endogenous peptides [Pyr1 ]apelin-13 (pKi = 8.83 ± 0.06) and apelin-17 (pKi = 9.57 ± 0.08). [Pyr1 ]apelin-13 was tenfold more potent in the cAMP (pD2 = 9.52 ± 0.05) compared to the β-arrestin (pD2 = 8.53 ± 0.03) assay, whereas apelin-17 (pD2 = 10.31 ± 0.28; pD2 = 10.15 ± 0.13, respectively) and MM202-AlbudAb (pD2 = 9.15 ± 0.12; pD2 = 9.26 ± 0.03, respectively) were equipotent in both assays, with MM202-AlbudAb tenfold less potent than apelin-17. MM202-AlbudAb bound to immobilised human serum albumin with high affinity (pKD = 9.02). In anaesthetised, male Sprague Dawley rats, MM202-AlbudAb (5 nmol, n = 15) significantly reduced left ventricular systolic pressure by 6.61 ± 1.46 mm Hg and systolic arterial pressure by 14.12 ± 3.35 mm Hg and significantly increased cardiac contractility by 533 ± 170 mm Hg/s, cardiac output by 1277 ± 190 RVU/min, stroke volume by 3.09 ± 0.47 RVU and heart rate by 4.64 ± 2.24 bpm. This study demonstrates that conjugating an apelin mimetic peptide to the AlbudAb structure retains receptor and in vivo activity and may be a new strategy for development of apelin peptides as therapeutic agents.
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Affiliation(s)
- Cai Read
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Peiran Yang
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Rhoda E Kuc
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Duuamene Nyimanu
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Thomas L Williams
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Robert C Glen
- The Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Cambridge, UK
- Computational and Systems Medicine, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London, UK
| | | | | | | | - Anthony P Davenport
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Janet J Maguire
- Experimental Medicine and Immunotherapeutics, Centre for Clinical Investigation, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
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13
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Zhang ZQ, Yang YF, Yan JR, Yu F, Wang XX, Wang ZC, Tian H, Yao ST. [Advanced glycated albumin induces macrophage pyroptosis via upregulating nucleotide-binding oligomerization domain-like receptor protein 3]. Sheng Li Xue Bao 2019; 71:846-854. [PMID: 31879740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The purpose of the present study was to investigate the effect of advanced glycated albumin (AGE-alb) on pyroptosis of macrophages and the underlying molecular mechanisms. RAW264.7 macrophages were treated with AGE-alb (1, 2, 4 and 6 g/L) and control albumin (C-alb, 4 g/L) for 24 h, or preincubated with MCC950 (1 μmol/L) for 1 h and then treated with AGE-alb (4 g/L) for 24 h. Cell viability and caspase-1 activity were measured by MTT and assay kits, respectively. Lactate dehydrogenase (LDH) activity and the levels of interleukin-1β (IL-1β) and IL-18 in media were detected. Cell death degree was evaluated by TUNEL and Hoechst 33342/PI staining. The protein levels of nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3), procaspase-1 and cleaved caspase-1 were assessed by Western blot. The results showed that AGE-alb treatment caused obvious decrease in cell viability and increases in LDH leakage and the percentages of TUNEL- or PI-positive cells in a concentration-dependent manner. Additionally, AGE-alb promoted IL-1β and IL-18 secretion, upregulated NLRP3 expression, and increased caspase-1 activity especially at the dose of 4 and 6 g/L. However, MCC950 (an NLRP3 inhibitor) pretreatment inhibited significantly the decrease in cell viability and the increases in LDH leakage and percentages of TUNEL- or PI-positive cells induced by AGE-alb. Furthermore, MCC950 attenuated obviously AGE-alb-induced IL-1β and IL-18 secretion and caspase-1 activation. These results indicate that AGE-alb may induce macrophage pyroptosis, and the mechanism is at least partially by activating NLRP3-caspase-1 pathway.
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Affiliation(s)
- Zhao-Qiang Zhang
- College of Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Yi-Fan Yang
- College of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Jing-Rui Yan
- College of Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Fei Yu
- College of Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Xiao-Xu Wang
- College of Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Zhi-Chao Wang
- College of Nursing, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Hua Tian
- Institute of Atherosclerosis, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China
| | - Shu-Tong Yao
- College of Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271000, China.
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14
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Martinez Fernandez A, Regazzoni L, Brioschi M, Gianazza E, Agostoni P, Aldini G, Banfi C. Pro-oxidant and pro-inflammatory effects of glycated albumin on cardiomyocytes. Free Radic Biol Med 2019; 144:245-255. [PMID: 31260731 DOI: 10.1016/j.freeradbiomed.2019.06.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 06/13/2019] [Accepted: 06/19/2019] [Indexed: 12/14/2022]
Abstract
Human serum albumin (HSA) is the most abundant circulating protein in the body and presents an extensive range of biological functions. As such, it is prone to undergo post-translational modifications (PTMs). The non-enzymatic early glycation of HSA, one of the several PTMs undergone by HSA, arises from the addition of reducing sugars to amine group residues, thus modifying the structure of HSA. These changes may affect HSA functions impairing its biological activity, finally leading to cell damage. The aim of this study was to quantitate glycated-HSA (GA) levels in the plasma of heart failure (HF) patients and to evaluate the biological effects of GA on HL-1 cardiomyocytes. Plasma GA content from HF patients and healthy subjects was measured by direct infusion electrospray ionization mass spectrometry (ESI-MS). Results pointed out a significant increase of GA in HF patients with respect to the control group (p < 0.05). Additionally, after stimulation with GA, proteomic analysis of HL-1 secreted proteins showed the modulation of several proteins involved, among other processes, in the response to stress. Further, stimulated cells showed a rapid increase in ROS generation, higher mRNA levels of the inflammatory cytokine interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α), and higher levels of the oxidative 4-HNE-protein adducts and carbonylated proteins. Our findings show that plasma GA is increased in HF patients. Further, GA exerts pro-inflammatory and pro-oxidant effects on cardiomyocytes, which suggest a causal role in the etiopathogenesis of HF.
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MESH Headings
- Aged
- Case-Control Studies
- Cell Death
- Cell Line
- Dyslipidemias/blood
- Dyslipidemias/genetics
- Dyslipidemias/pathology
- Female
- Gene Expression Profiling
- Gene Ontology
- Glycation End Products, Advanced
- Glycosylation
- HSP90 Heat-Shock Proteins/genetics
- HSP90 Heat-Shock Proteins/metabolism
- Heart Failure/blood
- Heart Failure/genetics
- Heart Failure/pathology
- Humans
- Hypertension/blood
- Hypertension/genetics
- Hypertension/pathology
- Interleukin-6/genetics
- Interleukin-6/metabolism
- Lysine/analogs & derivatives
- Lysine/blood
- Male
- Middle Aged
- Molecular Sequence Annotation
- Myocardium/metabolism
- Myocardium/pathology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Natriuretic Peptide, Brain/blood
- Natriuretic Peptide, Brain/genetics
- Protein Carbonylation
- Protein Processing, Post-Translational
- Reactive Oxygen Species/agonists
- Reactive Oxygen Species/metabolism
- Serum Albumin/pharmacology
- Serum Albumin, Human/chemistry
- Serum Albumin, Human/genetics
- Serum Albumin, Human/metabolism
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/metabolism
- Glycated Serum Albumin
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Affiliation(s)
| | - Luca Regazzoni
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | | | | | - Piergiuseppe Agostoni
- Centro Cardiologico Monzino, IRCCS, Milan, Italy; Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, Milan, Italy
| | - Giancarlo Aldini
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
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15
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Teran-Saavedra NG, Sarabia-Sainz JAI, Silva-Campa E, Burgara-Estrella AJ, Guzmán-Partida AM, Ramos-Clamont Montfort G, Pedroza-Montero M, Vazquez-Moreno L. Lactosylated Albumin Nanoparticles: Potential Drug Nanovehicles with Selective Targeting Toward an In Vitro Model of Hepatocellular Carcinoma. Molecules 2019; 24:molecules24071382. [PMID: 30970533 PMCID: PMC6479765 DOI: 10.3390/molecules24071382] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/27/2019] [Accepted: 04/04/2019] [Indexed: 01/10/2023] Open
Abstract
Hepatocellular carcinoma (HCC) ranks fifth in occurrence and second in mortality of all cancers. The development of effective therapies for HCC is urgently needed. Anticancer drugs targeted to the liver-specific asialoglycoprotein receptors (ASGPRs) are viewed as a promising potential treatment for HCC. ASGPRs facilitate the recognition and endocytosis of molecules, and possibly vehicles with galactose end groups, by the liver. In this study, bovine serum albumin (BSA) was conjugated with lactose using a thermal treatment. The formation of lactosylated BSA (BSA-Lac) was confirmed by a change of the chemical structure, increased molecular mass, and Ricinus communis lectin recognition. Subsequently, the low-crosslinking BSA-Lac nanoparticles (LC BSA-Lac NPs) and high-crosslinking BSA-Lac nanoparticles (HC BSA-Lac NPs) were synthesized. These nanoparticles presented spherical shapes with a size distribution of 560 ± 18.0 nm and 539 ± 9.0 nm, as well as an estimated surface charge of −26 ± 0.15 mV and −24 ± 0.45 mV, respectively. Both BSA-Lac NPs were selectively recognized by ASGPRs as shown by biorecognition, competition, and inhibition assays using an in vitro model of HCC. This justifies pursuing the strategy of using BSA-Lac NPs as potential drug nanovehicles with selective direction toward hepatocellular carcinoma.
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Affiliation(s)
- Nayelli Guadalupe Teran-Saavedra
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo E. Aztiazaran 46, Hermosillo 83304, Sonora, Mexico.
| | - Jose Andre-I Sarabia-Sainz
- Departamento de Investigacion en Fisica. Universidad de Sonora, P.O. Box 5-088, Hermosillo, C.P. 83190, Mexico.
| | - Erika Silva-Campa
- Departamento de Investigacion en Fisica. Universidad de Sonora, P.O. Box 5-088, Hermosillo, C.P. 83190, Mexico.
| | - Alexel J Burgara-Estrella
- Departamento de Investigacion en Fisica. Universidad de Sonora, P.O. Box 5-088, Hermosillo, C.P. 83190, Mexico.
| | - Ana María Guzmán-Partida
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo E. Aztiazaran 46, Hermosillo 83304, Sonora, Mexico.
| | - Gabriela Ramos-Clamont Montfort
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo E. Aztiazaran 46, Hermosillo 83304, Sonora, Mexico.
| | - Martín Pedroza-Montero
- Departamento de Investigacion en Fisica. Universidad de Sonora, P.O. Box 5-088, Hermosillo, C.P. 83190, Mexico.
| | - Luz Vazquez-Moreno
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo E. Aztiazaran 46, Hermosillo 83304, Sonora, Mexico.
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16
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Abstract
Sulphonylurea drugs stimulate insulin secretion from pancreatic β-cells primarily by inhibiting ATP sensitive potassium (KATP) channels in the β-cell membrane. The effective sulphonylurea concentration at its site of action is significantly attenuated by binding to serum albumin, which makes it difficult to compare in vitro and in vivo data. We therefore measured the ability of gliclazide and glibenclamide to inhibit KATP channels and stimulate insulin secretion in the presence of serum albumin. We used this data, together with estimates of free drug concentrations from binding studies, to predict the extent of sulphonylurea inhibition of KATP channels at therapeutic concentrations in vivo. KATP currents from mouse pancreatic β-cells and Xenopus oocytes were measured using the patch-clamp technique. Gliclazide and glibenclamide binding to human plasma were determined in spiked plasma samples using an ultrafiltration-mass spectrometry approach. Bovine serum albumin (60g/l) produced a mild, non-significant reduction of gliclazide block of KATP currents in pancreatic β-cells and Xenopus oocytes. In contrast, glibenclamide inhibition of recombinant KATP channels was dramatically suppressed by albumin (predicted free drug concentration <0.1%). Insulin secretion was also reduced. Free concentrations of gliclazide and glibenclamide in the presence of human plasma measured in binding experiments were 15% and 0.05%, respectively. Our data suggest the free concentration of glibenclamide in plasma is too low to account for the drug’s therapeutic effect. In contrast, the free gliclazide concentration in plasma is high enough to close KATP channels and stimulate insulin secretion.
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Affiliation(s)
- Peter Proks
- Oxford Centre for Gene Function, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
| | - Holger Kramer
- Oxford Centre for Gene Function, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
| | - Elizabeth Haythorne
- Oxford Centre for Gene Function, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
| | - Frances M. Ashcroft
- Oxford Centre for Gene Function, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom
- * E-mail:
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17
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Kang PP, Yao ST, Guo TT, Wang ZC, Tian H, Jiao P, Zhou J, Qin SC. [Activating transcription factor 6-C/EBP homologous protein pathway mediates advanced glycated albumin-induced macrophage apoptosis]. Sheng Li Xue Bao 2017; 69:767-774. [PMID: 29270592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The purpose of this study was to investigate whether activating transcription factor 6 (ATF6), a sensor to endoplasmic reticulum stress (ERS), would mediate advanced glycated albumin (AGE-alb)-induced macrophage apoptosis and to elucidate the possible molecular mechanisms. RAW264.7 macrophages were cultured in vitro and treated with AGE-alb (2, 4 and 6 g/L), normal control albumin or tunicamycin (TM, 4 mg/L) for 24 h. ATF6 small interfering RNA (siRNA) was transfected to RAW264.7 cells by Lipofectamine 2000. Cell viability and apoptosis were determined by MTT method and Annexin V-FITC/propidium iodide apoptosis detection kit, respectively. The activities of lactate dehydrogenase (LDH) in medium and caspase-3 in cells were measured by corresponding detection kits. ATF6 nuclear translocation was detected by Western blot and immunofluorescence cytochemistry. Protein and mRNA levels of C/EBP homologous protein (CHOP, a key-signaling component of ERS-induced apoptosis) were detected by Western blot and real-time fluorescence quantitative PCR, respectively. The results showed that similar to TM, AGE-alb increased the expression of CHOP at both the protein and mRNA levels in a concentration dependent manner. ATF6, as a factor that positively regulates CHOP expression, was activated by AGE-alb in a concentration dependent manner. siRNA-mediated knockdown of ATF6 significantly inhibited AGE-alb-induced macrophage injury, as indicated by the increased cell viability and the decreased LDH release, apoptosis and caspase-3 activation. Additionally, ATF6 siRNA attenuated AGE-alb-induced CHOP upregulation at both the protein and mRNA levels. These results suggest that ATF6 and its downstream molecule CHOP are involved in AGE-alb-induced macrophage apoptosis.
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Affiliation(s)
- Pan-Pan Kang
- Affiliated Hospital of Chengde Medical University, Chengde 067000, China
- Institute of Atherosclerosis, Key Laboratory of Atherosclerosis in Universities of Shandong, Taishan Medical University, Taian 271000, China
| | - Shu-Tong Yao
- Institute of Atherosclerosis, Key Laboratory of Atherosclerosis in Universities of Shandong, Taishan Medical University, Taian 271000, China
- College of Basic Medical Sciences, Taishan Medical University, Taian 271000, China
| | - Tian-Tian Guo
- School of Dentistry and Oral Health, Taishan Medical University, Taian 271000, China
| | - Zhi-Chao Wang
- Institute of Atherosclerosis, Key Laboratory of Atherosclerosis in Universities of Shandong, Taishan Medical University, Taian 271000, China
| | - Hua Tian
- Institute of Atherosclerosis, Key Laboratory of Atherosclerosis in Universities of Shandong, Taishan Medical University, Taian 271000, China
| | - Peng Jiao
- Institute of Atherosclerosis, Key Laboratory of Atherosclerosis in Universities of Shandong, Taishan Medical University, Taian 271000, China
| | - Jian Zhou
- Affiliated Hospital of Chengde Medical University, Chengde 067000, China.
| | - Shu-Cun Qin
- Institute of Atherosclerosis, Key Laboratory of Atherosclerosis in Universities of Shandong, Taishan Medical University, Taian 271000, China.
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18
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Schillinger M, Exner M, Mlekusch W, Amighi J, Sabeti S, Schlager O, Wagner O, Minar E. Serum albumin predicts cardiac adverse events in patients with advanced atherosclerosis – interrelation with traditional cardiovascular risk factors. Thromb Haemost 2017; 91:610-8. [PMID: 14983239 DOI: 10.1160/th03-08-0504] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 11/05/2022]
Abstract
SummaryLow serum albumin is a powerful predictor of cardiovascular adverse events in healthy subjects and patients with subclinical atherosclerosis. We investigated the association between serum albumin, traditional cardiovascular risk factors, markers of inflammation and cardiovascular outcome in 515 patients with advanced atherosclerosis and severe peripheral artery disease. Cardiovascular risk profile, serum albumin, serum amyloid A (SAA) and fibrinogen were obtained at baseline, and patients were followed for median 21 months (interquartile range 12 to 25) for the occurrence of major adverse cardiac events (MACE: myocardial infarction, percutaneous coronary interventions, coronary artery bypass graft, and death). We observed 135 MACE in 109 patients (21%). Cumulative event-free survival rates at 6, 12, and 24 months were 95%, 91%, and 80%, respectively. Low albumin predicted MACE independently of SAA and fibrinogen. Adjusted hazard ratios for the occurrence of MACE, any death, and the composite of death and MI according to increasing quartiles of albumin were 2.40, 1.14 and 1.09 (p<0.001), 2.94, 1.34 and 1.11 (p=0.003) and 3.63, 1.86 and 1.29 (p<0.001), respectively, as compared to the highest quartile. Considering albumin in conjunction with traditional cardiovascular risk factors (smoking, hyperlipidemia, hypertension and diabetes), we found that low albumin predicted MACE only in patients with a low risk profile (less than 3 risk factors) (p<0.001), whereas low albumin was not associated with MACE in patients with three or more risk factors (p=0.66). We conclude that low serum albumin is associated with cardiovascular outcome of patients with advanced atherosclerosis adding to the prognostic information of other inflammatory markers, and may be particularly useful for risk prediction in patients with few traditional risk factors.
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Affiliation(s)
- Martin Schillinger
- Department of Angiology, Vienna General Hospital, Medical School, Waehringer Guertel 18-20, A-1090 Vienna, Austria.
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Marques CMS, Nunes EA, Lago L, Pedron CN, Manieri TM, Sato RH, Oliveira VX, Cerchiaro G. Generation of Advanced Glycation End-Products (AGEs) by glycoxidation mediated by copper and ROS in a human serum albumin (HSA) model peptide: reaction mechanism and damage in motor neuron cells. Mutat Res Genet Toxicol Environ Mutagen 2017; 824:42-51. [PMID: 29150049 DOI: 10.1016/j.mrgentox.2017.10.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/17/2017] [Accepted: 10/17/2017] [Indexed: 06/07/2023]
Abstract
Glucose, in the presence of reactive oxygen species (ROS), acts as an as an oxidative agent and drives deleterious processes in Diabetes Mellitus. We have studied the mechanism and the toxicological effects of glucose-dependent glycoxidation reactions driven by copper and ROS, using a model peptide based on the exposed sequence of Human Serum Albumin (HSA) and containing a lysine residue susceptible to copper complexation. The main products of these reactions are Advanced Glycation End-products (AGEs). Carboxymethyl lysine and pyrraline condensed on the model peptide, generating a Modified Peptide (MP). These products were isolated, purified, and tested on cultured motor neuron cells. We observed DNA damage, enhancement of membrane roughness, and formation of domes. We evaluated nuclear abnormalities by the cytokinesis-blocked micronucleus assay and we measured cytostatic and cytotoxic effects, chromosomal breakage, nuclear abnormalities, and cell death. AGEs formed by glycoxidation caused large micronucleus aberrations, apoptosis, and large-scale nuclear abnormalities, even at low concentrations.
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Affiliation(s)
| | - Emilene Arusievicz Nunes
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - Larissa Lago
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - Cibele Nicolaski Pedron
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - Tânia Maria Manieri
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - Roseli Hiromi Sato
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - Vani Xavier Oliveira
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil
| | - Giselle Cerchiaro
- Center for Natural Sciences and Humanities, Federal University of ABC - UFABC, Avenida dos Estados 5001, 09210-580, Santo André, SP, Brazil.
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20
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Paar M, Rossmann C, Nusshold C, Wagner T, Schlagenhauf A, Leschnik B, Oettl K, Koestenberger M, Cvirn G, Hallström S. Anticoagulant action of low, physiologic, and high albumin levels in whole blood. PLoS One 2017; 12:e0182997. [PMID: 28800610 PMCID: PMC5553770 DOI: 10.1371/journal.pone.0182997] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 07/27/2017] [Indexed: 01/01/2023] Open
Abstract
Albumin is the most abundant plasma protein. Critical illness is often associated with altered, predominately decreased, serum albumin levels. This hypoalbuminaemia is usually corrected by administration of exogenous albumin. This study aimed to track the concentration-dependent influence of albumin on blood coagulation in vitro. Whole blood (WB) samples from 25 volunteers were prepared to contain low (19.3 ± 7.7 g/L), physiological (45.2 ± 7.8 g/L), and high (67.5 ± 18.1 g/L) levels of albumin. Haemostatic profiling was performed using a platelet function analyzer (PFA) 200, impedance aggregometry, a Cone and Platelet analyzer (CPA), calibrated automated thrombogram, and thrombelastometry (TEM). Platelet aggregation-associated ATP release was assessed via HPLC analysis. In the low albumin group, when compared to the physiological albumin group, we found: i) shortened PFA 200-derived closure times indicating increased primary haemostasis; ii) increased impedance aggregometry-derived amplitudes, slopes, ATP release, as well as CPA-derived average size indicating improved platelet aggregation; iii) increased TEM-derived maximum clot firmness and alpha angles indicating enhanced clot formation. TEM measurements indicated impaired clot formation in the high albumin group compared with the physiological albumin group. Thus, albumin exerted significant anticoagulant action. Therefore, low albumin levels, often present in cancer or critically ill patients, might contribute to the frequently occurring venous thromboembolism.
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Affiliation(s)
- Margret Paar
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Christine Rossmann
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Christoph Nusshold
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Thomas Wagner
- Department of Blood Group Serology and Transfusion Medicine, Medical University of Graz, Graz, Austria
| | | | - Bettina Leschnik
- Department of Pediatrics, Medical University of Graz, Graz, Austria
| | - Karl Oettl
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | | | - Gerhard Cvirn
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
- * E-mail:
| | - Seth Hallström
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
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21
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Baret P, Le Sage F, Planesse C, Meilhac O, Devin A, Bourdon E, Rondeau P. Glycated human albumin alters mitochondrial respiration in preadipocyte 3T3-L1 cells. Biofactors 2017; 43:577-592. [PMID: 28543688 DOI: 10.1002/biof.1367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 04/02/2017] [Accepted: 04/20/2017] [Indexed: 12/22/2022]
Abstract
Diabetes and obesity are strongly associated with increased levels of circulating advanced glycation end products (AGEs) and reactive oxygen species (ROS). These two molecular phenomena affect the physiology of adipose tissue, a biological driver of the metabolic syndrome, leading to an inflammatory profile and insulin resistance, which could contribute to obesity/diabetes-associated complications, such as cardiovascular diseases. Herein, we investigated the impact of AGEs on mitochondrial bioenergetics in murine preadipocyte cells (3T3-L1) and cellular redox homeostasis. We show that incubation of preadipocytes with AGEs stimulates mitochondrial activity and respiration while inducing oxidative stress. This AGE-induced intracellular ROS production was blocked by diphenylene iodonium, an NAD(P)H oxidase inhibitor. In parallel, antioxidant enzymes (catalase, superoxide dismutase, and glutathione peroxidase) were found to be activated upon AGE treatment. Our results suggest that AGE-induced oxidative stress is generated by NAD(P)H oxidase and leads to a cellular proliferation arrest associated with enhanced mitochondrial metabolism and biogenesis, and with increased levels of ROS-detoxifying enzymes, as well. These new data show how AGEs may be involved in hyperglycemia-induced oxidative damage in preadipocytes and their potential links to diabetes progression. © 2017 BioFactors, 43(4):577-592, 2017.
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Affiliation(s)
- Pascal Baret
- Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, France
- Université de La Réunion, UMR 1188, Sainte-Clotilde, France
| | - Fanny Le Sage
- Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, France
- Université de La Réunion, UMR 1188, Sainte-Clotilde, France
| | - Cynthia Planesse
- Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, France
- Université de La Réunion, UMR 1188, Sainte-Clotilde, France
| | - Olivier Meilhac
- Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, France
- Université de La Réunion, UMR 1188, Sainte-Clotilde, France
- CHU de La Réunion, Centre d'Investigation Clinique, Saint-Denis, France
| | - Anne Devin
- CNRS, Institut de Biochimie et Génétique Cellulaires, UMR 5095, Université de Bordeaux, Bordeaux, France
| | - Emmanuel Bourdon
- Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, France
- Université de La Réunion, UMR 1188, Sainte-Clotilde, France
| | - Philippe Rondeau
- Inserm, UMR 1188 Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, France
- Université de La Réunion, UMR 1188, Sainte-Clotilde, France
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22
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Horváthy DB, Simon M, Schwarz CM, Masteling M, Vácz G, Hornyák I, Lacza Z. Serum albumin as a local therapeutic agent in cell therapy and tissue engineering. Biofactors 2017; 43:315-330. [PMID: 27859738 DOI: 10.1002/biof.1337] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/05/2016] [Accepted: 10/03/2016] [Indexed: 12/15/2022]
Abstract
Albumin is a major plasma protein that has become ubiquitous in regenerative medicine research. As such, many studies have examined its structure and advantageous properties. However, a systematic and comprehensive understanding of albumin's role, capabilities and therapeutic potential still eludes the field. In the present work, we review how albumin is applied in tissue engineering, including cell culture and storage, in vitro fertilization and transplantation. Furthermore, we discuss how albumin's physiological role extends beyond a carrier for metal ions, fatty acids, pharmacons and growth factors. Albumin acts as a bacteriostatic coating that simultaneously promotes attachment and proliferation of eukaryotic cells. These properties with the combination of free radical scavenging, neutrophil activation and as a buffer molecule already make the albumin protein beneficial in healing processes supporting functional tissue remodeling. Nevertheless, recent data revealed that albumin can be synthesized by osteoblasts and its local concentration is raised after bone trauma. Interestingly, by increasing the local albumin concentration in vivo, faster bone healing is achieved, possibly because albumin recruits endogenous stem cells and promotes the growth of new bone. These data also suggest an active role of albumin, even though a specific receptor has not yet been identified. Together, this discussion sheds light on why the extravascular use of the albumin molecule is in the scope of scientific investigations and why it should be considered as a local therapeutic agent in regenerative medicine. © 2016 BioFactors, 43(3):315-330, 2017.
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Affiliation(s)
- Dénes B Horváthy
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Melinda Simon
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Charlotte M Schwarz
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Mariana Masteling
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Gabriella Vácz
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - István Hornyák
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Zsombor Lacza
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
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23
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Navarrete A, Rupérez FJ, Mendes TO, Pérez-Rial S, Girón-Martínez A, Terrón-Expósito R, Díaz-Gil JJ, Peces-Barba G, Barbas C, García A. A metabolomic approach shows sphingosine 1-phosphate and lysophospholipids as mediators of the therapeutic effect of liver growth factor in emphysema. J Pharm Biomed Anal 2017; 139:238-246. [PMID: 28314215 DOI: 10.1016/j.jpba.2017.02.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 02/18/2017] [Accepted: 02/26/2017] [Indexed: 02/06/2023]
Abstract
Tobacco smoke exposure is the principal cause of lung tissue destruction, which in turn results in emphysema that leads into shortness of breath. Liver growth factor (LGF, a cell and tissue regenerating factor with therapeutic activity in several organs) has antifibrotic and antioxidant properties that could be useful to promote lung tissue regenerating capacity in damaged lungs. The current study has examined differences in metabolite profiles (fingerprints) of plasma from mice (strain C57BL/6J, susceptible to develop emphysema) exposed to tobacco smoke during six months. One group of mice received a treatment with Liver Growth Factor (LGF) after emphysema was established, whereas the other group did not receive the treatment. Age and sex-matched mice not exposed to smoke were also maintained with or without treatment as controls. Metabolic fingerprints (untargeted analysis) of plasma after protein precipitation were obtained by LC-QTOF-MS. The signals were processed and a large number of possible metabolites were found (23944). Multivariate data analysis provided models that highlighted the differences between control and smoke exposed mice in both conditions. Accurate masses of features (possible compounds) representing significant differences were searched using online public databases. Lipid mediators, related to intracellular signaling in inflammation, were found among the metabolites putatively identified as markers of the different conditions and among them, sphingosine, sphingosine 1-phosphate and lysophospholipids point at the relevance of such metabolites in the regulation of the processes related to tissue regeneration mediated by LGF. These results also suggest that metabolomic fingerprinting could potentially guide the characterization of relevant metabolites leading the regeneration of lungs in emphysema disease.
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Affiliation(s)
- A Navarrete
- CEMBIO (Center for Metabolomics and Bioanalysis), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Boadilla del Monte, 28668, Madrid, Spain
| | - F J Rupérez
- CEMBIO (Center for Metabolomics and Bioanalysis), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Boadilla del Monte, 28668, Madrid, Spain
| | - T O Mendes
- CEMBIO (Center for Metabolomics and Bioanalysis), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Boadilla del Monte, 28668, Madrid, Spain
| | - S Pérez-Rial
- Pulmonology Experimental Lab., IIS-Fundación Jiménez Díaz-UAM-CIBERES, Avenida Reyes Católicos 2, 28040, Madrid, Spain
| | - A Girón-Martínez
- Pulmonology Experimental Lab., IIS-Fundación Jiménez Díaz-UAM-CIBERES, Avenida Reyes Católicos 2, 28040, Madrid, Spain
| | - R Terrón-Expósito
- Pulmonology Experimental Lab., IIS-Fundación Jiménez Díaz-UAM-CIBERES, Avenida Reyes Católicos 2, 28040, Madrid, Spain
| | - J J Díaz-Gil
- Pulmonology Experimental Lab., IIS-Fundación Jiménez Díaz-UAM-CIBERES, Avenida Reyes Católicos 2, 28040, Madrid, Spain
| | - G Peces-Barba
- Pulmonology Experimental Lab., IIS-Fundación Jiménez Díaz-UAM-CIBERES, Avenida Reyes Católicos 2, 28040, Madrid, Spain
| | - C Barbas
- CEMBIO (Center for Metabolomics and Bioanalysis), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Boadilla del Monte, 28668, Madrid, Spain
| | - A García
- CEMBIO (Center for Metabolomics and Bioanalysis), Facultad de Farmacia, Universidad CEU San Pablo, Campus Montepríncipe, Boadilla del Monte, 28668, Madrid, Spain.
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24
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Garibaldi S, Barisione C, Marengo B, Ameri P, Brunelli C, Balbi M, Ghigliotti G. Advanced Oxidation Protein Products-Modified Albumin Induces Differentiation of RAW264.7 Macrophages into Dendritic-Like Cells Which Is Modulated by Cell Surface Thiols. Toxins (Basel) 2017; 9:toxins9010027. [PMID: 28075404 PMCID: PMC5308259 DOI: 10.3390/toxins9010027] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 12/24/2016] [Accepted: 01/03/2017] [Indexed: 12/11/2022] Open
Abstract
Local accumulation of Advanced Oxidation Protein Products (AOPP) induces pro-inflammatory and pro-fibrotic processes in kidneys and is an independent predictor of renal fibrosis and of rapid decline of eGFR in patients with chronic kidney disease (CKD). In addition to kidney damage, circulating AOPP may be regarded as mediators of systemic oxidative stress and, in this capacity, they might play a role in the progression of atherosclerotic damage of arterial walls. Atherosclerosis is a chronic inflammatory disease that involves activation of innate and adaptive immunity. Dendritic cells (DCs) are key cells in this process, due to their role in antigen presentation, inflammation resolution and T cell activation. AOPP consist in oxidative modifications of proteins (such as albumin and fibrinogen) that mainly occur through myeloperoxidase (MPO)-derived hypochlorite (HOCl). HOCl modified proteins have been found in atherosclerotic lesions. The oxidizing environment and the shifts in cellular redox equilibrium trigger inflammation, activate immune cells and induce immune responses. Thus, surface thiol groups contribute to the regulation of immune functions. The aims of this work are: (1) to evaluate whether AOPP-proteins induce activation and differentiation of mature macrophages into dendritic cells in vitro; and (2) to define the role of cell surface thiol groups and of free radicals in this process. AOPP-proteins were prepared by in vitro incubation of human serum albumin (HSA) with HOCl. Mouse macrophage-like RAW264.7 were treated with various concentrations of AOPP-HSA with or without the antioxidant N-acetyl cysteine (NAC). Following 48 h of HSA-AOPP treatment, RAW264.7 morphological changes were evaluated by microscopic observation, while markers of dendritic lineage and activation (CD40, CD86, and MHC class II) and allogeneic T cell proliferation were evaluated by flow cytometry. Cell surface thiols were measured by AlexaFluor-maleimide binding, and ROS production was assessed as DCF fluorescence by flow cytometry. HSA-AOPP induced the differentiation of RAW264.7 cells into a dendritic-like phenotype, as shown by morphological changes, by increased CD40, CD86 and MHC class II surface expression and by induction of T cell proliferation. The cell surface thiols dose dependently decreased following HSA-AOPP treatment, while ROS production increased. NAC pre-treatment enhanced the amount of cell surface thiols and prevented their reduction due to treatment with AOPP. Both ROS production and RAW264.7 differentiation into DC-like cells induced by HSA-AOPP were reduced by NAC. Our results highlight that oxidized plasma proteins modulate specific immune responses of macrophages through a process involving changes in the thiol redox equilibrium. We suggest that this mechanism may play a role in determining the rapid progression of the atherosclerotic process observed in CKD patients.
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Affiliation(s)
- Silvano Garibaldi
- Division of Cardiology, IRCCS University Hospital San Martino, Research Centre of Cardiovascular Biology, University of Genova, Genova 16132, Italy.
| | - Chiara Barisione
- Division of Cardiology, IRCCS University Hospital San Martino, Research Centre of Cardiovascular Biology, University of Genova, Genova 16132, Italy.
| | - Barbara Marengo
- Department of Experimental Medicine, University of Genova, Genova 16132, Italy.
| | - Pietro Ameri
- Division of Cardiology, IRCCS University Hospital San Martino, Research Centre of Cardiovascular Biology, University of Genova, Genova 16132, Italy.
| | - Claudio Brunelli
- Division of Cardiology, IRCCS University Hospital San Martino, Research Centre of Cardiovascular Biology, University of Genova, Genova 16132, Italy.
| | - Manrico Balbi
- Division of Cardiology, IRCCS University Hospital San Martino, Research Centre of Cardiovascular Biology, University of Genova, Genova 16132, Italy.
| | - Giorgio Ghigliotti
- Division of Cardiology, IRCCS University Hospital San Martino, Research Centre of Cardiovascular Biology, University of Genova, Genova 16132, Italy.
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Zhang MS, Houtman JCD. Human Serum Albumin (HSA) Suppresses the Effects of Glycerol Monolaurate (GML) on Human T Cell Activation and Function. PLoS One 2016; 11:e0165083. [PMID: 27764189 PMCID: PMC5072635 DOI: 10.1371/journal.pone.0165083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 10/05/2016] [Indexed: 01/30/2023] Open
Abstract
Glycerol monolaurate (GML) is a monoglyceride with well characterized anti-microbial properties. Because of these properties, GML is widely used in food, cosmetics, and personal care products and currently being tested as a therapeutic for menstrual associated toxic shock syndrome, superficial wound infections, and HIV transmission. Recently, we have described that GML potently suppresses select T cell receptor (TCR)-induced signaling events, leading to reduced human T cell effector functions. However, how soluble host factors present in the blood and at sites of infection affect GML-mediated human T cell suppression is unknown. In this study, we have characterized how human serum albumin (HSA) affects GML-induced inhibition of human T cells. We found that HSA and other serum albumins bind to 12 carbon acyl side chain of GML at low micromolar affinities and restores the TCR-induced formation of LAT, PLC-γ1, and AKT microclusters at the plasma membrane. Additionally, HSA reverses GML mediated inhibition of AKT phosphorylation and partially restores cytokine production in GML treated cells. Our data reveal that HSA, one of the most abundant proteins in the human serum and at sites of infections, potently reverses the suppression of human T cells by GML. This suggests that GML-driven human T cell suppression depends upon the local tissue environment, with albumin concentration being a major determinant of GML function.
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Affiliation(s)
- Michael S. Zhang
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242, United States of America
| | - Jon C. D. Houtman
- Department of Microbiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242, United States of America
- * E-mail:
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26
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Abstract
The ABC transporters multidrug resistance associated protein 2 (MRP2) and breast cancer resistance protein (BCRP) are of interest in drug development, since they affect the pharmacokinetics of several drugs. Membrane vesicle transport assays are widely used to study interactions with these proteins. Since albumin has been found to affect the kinetics of metabolic enzymes in similar membrane preparations, we investigated whether albumin affects the kinetic parameters of efflux transport. We found that albumin increased the Vmax of 5(6)-carboxy-2',7'-dichlorofluorescein (CDCF) and estradiol-17-β-D-glucuronide uptake into MRP2 vesicles in the presence of 0.1% bovine serum albumin (BSA) by 2 and 1.5-fold, respectively, while BSA increased Lucifer yellow uptake by 30% in BCRP vesicles. Km values increased slightly, but the change was not statistically significant. The effect of BSA on substrate uptake was dependent on the vesicle amount, while increasing BSA concentration did not significantly improve substrate uptake. These results indicate a minor effect of albumin on MRP2 and BCRP, but it should be considered if albumin is added to transporter assays for example as a solubilizer, since the effect may be substrate or transporter specific.
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Affiliation(s)
- Feng Deng
- Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Noora Sjöstedt
- Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Heidi Kidron
- Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- * E-mail:
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27
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Bertino G, Privitera G, Purrello F, Demma S, Crisafulli E, Spadaro L, Koukias N, Tsochatzis EA. Emerging hepatic syndromes: pathophysiology, diagnosis and treatment. Intern Emerg Med 2016; 11:905-16. [PMID: 27273018 DOI: 10.1007/s11739-016-1478-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/25/2016] [Indexed: 12/11/2022]
Abstract
Liver cirrhosis is a major cause of morbidity and mortality worldwide, mainly due to complications of portal hypertension. In this article, we review the current understanding on the pathophysiology, the diagnostic criteria and the available therapeutic options for patients with emerging hepatic syndromes in cirrhosis, namely the hepatorenal, hepato-adrenal and hepatopulmonary syndrome. The hepatorenal syndrome is a well-recognized complication of advanced cirrhosis and is usually associated with an accelerated course to death unless liver transplantation is performed. The hepatopulmonary syndrome is often missed in the evaluation of patients with cirrhosis; however, early recognition is essential for the efficient management of individual patients. The hepato-adrenal syndrome, although not fully characterized, offers an exciting field for research and potential therapeutic interventions.
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Affiliation(s)
- Gaetano Bertino
- Hepatology Unit, Department of Clinical and Experimental Medicine, University of Catania, Policlinico "G. Rodolico", Catania, Italy
| | - Graziella Privitera
- Internal Medicine, Department of Clinical and Experimental Medicine, University of Catania, Ospedale Garibaldi-Nesima, Catania, Italy
| | - Francesco Purrello
- Internal Medicine, Department of Clinical and Experimental Medicine, University of Catania, Ospedale Garibaldi-Nesima, Catania, Italy
| | - Shirin Demma
- Hepatology Unit, Department of Clinical and Experimental Medicine, University of Catania, Policlinico "G. Rodolico", Catania, Italy
| | - Emanuele Crisafulli
- Hepatology Unit, Department of Clinical and Experimental Medicine, University of Catania, Policlinico "G. Rodolico", Catania, Italy
| | - Luisa Spadaro
- Internal Medicine, Department of Clinical and Experimental Medicine, University of Catania, Ospedale Garibaldi-Nesima, Catania, Italy
| | - Nikolaos Koukias
- UCL Institute for Liver and Digestive Health and Sheila Sherlock Liver Unit, Royal Free Hospital and UCL, London, UK
| | - Emmanuel A Tsochatzis
- UCL Institute for Liver and Digestive Health and Sheila Sherlock Liver Unit, Royal Free Hospital and UCL, London, UK.
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Song Z, Lu Y, Zhang X, Wang H, Han J, Dong C. Novel curcumin-loaded human serum albumin nanoparticles surface functionalized with folate: characterization and in vitro/vivo evaluation. Drug Des Devel Ther 2016; 10:2643-9. [PMID: 27574403 PMCID: PMC4993280 DOI: 10.2147/dddt.s112039] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Folate-conjugated, curcumin-loaded human serum albumin nanoparticles (F-CM-HSANPs) were obtained by the chemical conjugation of folate to the surface of the curcumin (CM)-loaded human serum albumin nanoparticles (NPs). The NPs were characterized by various parameters, including size, polydispersity, zeta potential, morphology, encapsulation efficiency, and drug release profile. The mean particle size of F-CM-HSANPs was 165.6±15.7 nm (polydispersity index <0.28), and the average encapsulation efficiency percentage and drug loading percentage of the F-CM-HSANPs were 88.7%±4.8% and 7.9%±0.4%, respectively. Applied in vitro, the CM NPs, after conjugation with folate, maintained sustained release, and a faster release of CM was more visibly observed than the unconjugated NPs. F-CM-HSANPs can prolong the retention time of CM significantly in vivo. However, after intravenous injection of F-CM-HSANPs, the pharmacokinetic parameters of CM were not significantly different from those of CM-loaded human serum albumin NPs. The improved antitumor activity of F-CM-HSANPs may be attributable to the protection of drug from enzymatic deactivation followed by the selective localization at the desired site. These results suggest that the intravenous injection of F-CM-HSANPs is likely to have an advantage in the current clinical CM formulation, because it does not require the use of a solubilization agent and it is better able to target the tumor tissue.
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Affiliation(s)
| | | | | | | | - Junyi Han
- Department of Gastrointestinal Surgery, Shanghai East Hospital, Tongji University, Shanghai, People’s Republic of China
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Garonzik SM, Lenhard JR, Forrest A, Holden PN, Bulitta JB, Tsuji BT. Defining the Active Fraction of Daptomycin against Methicillin-Resistant Staphylococcus aureus (MRSA) Using a Pharmacokinetic and Pharmacodynamic Approach. PLoS One 2016; 11:e0156131. [PMID: 27284923 PMCID: PMC4902307 DOI: 10.1371/journal.pone.0156131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 04/11/2016] [Indexed: 11/30/2022] Open
Abstract
Our objective was to study the pharmacodynamics of daptomycin in the presence of varying concentrations of human serum (HS) in vitro to quantify the fraction of daptomycin that is ‘active’. Time kill experiments were performed with daptomycin (0 to 256 mg/L) against two MRSA strains at log-phase growth, in the presence of HS (0%, 10%, 30%, 50%, 70%) combined with Mueller-Hinton broth. Daptomycin ≥ 2 mg/L achieved 99.9% kill within 8 h at all HS concentrations; early killing activity was slightly attenuated at higher HS concentrations. After 1 h, bacterial reduction of USA300 upon exposure to daptomycin 4 mg/L ranged from -3.1 to -0.5 log10CFU/mL in the presence of 0% to 70% HS, respectively. Bactericidal activity was achieved against both strains at daptomycin ≥ 4 mg/L for all fractions of HS exposure. A mechanism-based mathematical model (MBM) was developed to estimate the active daptomycin fraction at each %HS, comprising 3 bacterial subpopulations differing in daptomycin susceptibility. Time-kill data were fit with this MBM with excellent precision (r2 >0.95). The active fraction of daptomycin was estimated to range from 34.6% to 25.2% at HS fractions of 10% to 70%, respectively. Despite the reported low unbound fraction of daptomycin, the impact of protein binding on the activity of daptomycin was modest. The active fraction approach can be utilized to design in vitro experiments and to optimize therapeutic regimens of daptomycin in humans.
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Affiliation(s)
- Samira M. Garonzik
- Laboratory for Antimicrobial Pharmacodynamics, School of Pharmacy and Pharmaceutical Sciences Buffalo, Buffalo, NY, United States of America
| | - Justin R. Lenhard
- Laboratory for Antimicrobial Pharmacodynamics, School of Pharmacy and Pharmaceutical Sciences Buffalo, Buffalo, NY, United States of America
- New York State Center of Excellence in Bioinformatics & Life Sciences, University at Buffalo, Buffalo, NY, United States of America
| | - Alan Forrest
- Laboratory for Antimicrobial Pharmacodynamics, School of Pharmacy and Pharmaceutical Sciences Buffalo, Buffalo, NY, United States of America
- Department of Pharmacotherapy and Experimental Therapeutics, School of Pharmacy, University of North Carolina, Chapel Hill, NC, United States of America
| | - Patricia N. Holden
- Laboratory for Antimicrobial Pharmacodynamics, School of Pharmacy and Pharmaceutical Sciences Buffalo, Buffalo, NY, United States of America
- New York State Center of Excellence in Bioinformatics & Life Sciences, University at Buffalo, Buffalo, NY, United States of America
| | - Jϋrgen B. Bulitta
- Laboratory for Antimicrobial Pharmacodynamics, School of Pharmacy and Pharmaceutical Sciences Buffalo, Buffalo, NY, United States of America
- Center for Pharmacometrics and Systems Pharmacology, College of Pharmacy, University of Florida, Orlando, FL, United States of America
| | - Brian T. Tsuji
- Laboratory for Antimicrobial Pharmacodynamics, School of Pharmacy and Pharmaceutical Sciences Buffalo, Buffalo, NY, United States of America
- New York State Center of Excellence in Bioinformatics & Life Sciences, University at Buffalo, Buffalo, NY, United States of America
- * E-mail:
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Falah M, Rayan A, Srouji S. Storage effect on viability and biofunctionality of human adipose tissue-derived stromal cells. Cytotherapy 2016; 17:1220-9. [PMID: 26276005 DOI: 10.1016/j.jcyt.2015.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 05/05/2015] [Accepted: 05/26/2015] [Indexed: 01/08/2023]
Abstract
BACKGROUND AIMS In our recent studies, the transplantation of human adipose tissue-derived stromal cells (ASCs) has shown promise for treatment of diseases related to bone and joint disorders. METHODS For the current clinical applications, ASCs were formulated and suspended in PlasmaLyte A supplemented with heparin, glucose and human serum albumin, balanced to pH 7.4 with sodium bicarbonate. This cell solution constitutes 20% of the overall transplanted mixture and is supplemented with hyaluronic acid (60%) and OraGraft particles (20%). We intended to investigate the effect of this transplantation mixture on the viability and biofunctionality of ASCs in bone formation. Freshly harvested cells were resuspended and incubated in the indicated mixture for up to 48 h at 4°C. Cell viability was assessed using trypan blue and AlamarBlue, and cell functionality was determined by quantifying their adhesion rate in vitro and bone formation in an ectopic mouse model. RESULTS More than 80% of the ASCs stored in the transplantation mixture were viable for up to 24 h. Cell viability beyond 24 h in storage decreased to approximately 50%. In addition, an equal degree of bone formation was observed between the cells transplanted following incubation in transplantation mixture for up to 24 h and zero-time non-incubated cells (control). CONCLUSIONS The viability and functionality of ASCs stored in the presented formulation will make such cell therapy accessible to larger and more remote populations.
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Affiliation(s)
- Mizied Falah
- Drug Discovery Informatics Lab, QRC-Qasemi Research Center, Al-Qasemi Academic College, Baka El-Garbiah, Israel
| | - Anwar Rayan
- Drug Discovery Informatics Lab, QRC-Qasemi Research Center, Al-Qasemi Academic College, Baka El-Garbiah, Israel
| | - Samer Srouji
- Oral and Maxillofacial Surgery Department, Bone Regeneration Lab, Galilee Medical Center, Nahariya, Israel; Faculty of Medicine in the Galilee, Bar-ilan University, Ramat Gan, Israel.
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Damiani E, Ince C, Orlando F, Pierpaoli E, Cirioni O, Giacometti A, Mocchegiani F, Pelaia P, Provinciali M, Donati A. Effects of the Infusion of 4% or 20% Human Serum Albumin on the Skeletal Muscle Microcirculation in Endotoxemic Rats. PLoS One 2016; 11:e0151005. [PMID: 26942605 PMCID: PMC4778913 DOI: 10.1371/journal.pone.0151005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/21/2016] [Indexed: 12/29/2022] Open
Abstract
Background Sepsis-induced microcirculatory alterations contribute to tissue hypoxia and organ dysfunction. In addition to its plasma volume expanding activity, human serum albumin (HSA) has anti-oxidant and anti-inflammatory properties and may have a protective role in the microcirculation during sepsis. The concentration of HSA infused may influence these effects. We compared the microcirculatory effects of the infusion of 4% and 20% HSA in an experimental model of sepsis. Methods Adult male Wistar rats were equipped with arterial and venous catheters and received an intravenous infusion of lipopolysaccharide (LPS, serotype O127:B8, 10 mg/kg over 30 minutes) or vehicle (SHAM, n = 6). Two hours later, endotoxemic animals were randomized to receive 10 mL/kg of either 4% HSA (LPS+4%HSA, n = 6), 20% HSA (LPS+20%HSA, n = 6) or 0.9% NaCl (LPS+0.9%NaCl, n = 6). No fluids were given to an additional 6 animals (LPS). Vessel density and perfusion were assessed in the skeletal muscle microcirculation with sidestream dark field videomicroscopy at baseline (t0), 2 hours after LPS injection (t1), after HSA infusion (t2) and 1 hour later (t3). The mean arterial pressure (MAP) and heart rate were recorded. Serum endothelin-1 was measured at t2. Results MAP was stable over time in all groups. The microcirculatory parameters were significantly altered in endotoxemic animals at t1. The infusion of both 4% and 20% HSA similarly increased the perfused vessel density and blood flow velocity and decreased the flow heterogeneity to control values. Microvascular perfusion was preserved in the LPS+20%HSA group at t3, whereas alterations reappeared in the LPS+4%HSA group. Conclusions In a rat model of normotensive endotoxemia, the infusion of 4% or 20% HSA produced a similar acute improvement in the microvascular perfusion in otherwise unresuscitated animals.
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Affiliation(s)
- Elisa Damiani
- Anaesthesia and Intensive Care Unit, Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Can Ince
- Department of Translational Physiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Fiorenza Orlando
- Advanced Technology Center for Aging Research, Scientific Technological Area, IRCCS-INRCA, Ancona, Italy
| | - Elisa Pierpaoli
- Advanced Technology Center for Aging Research, Scientific Technological Area, IRCCS-INRCA, Ancona, Italy
| | - Oscar Cirioni
- Institute of Infectious Disease and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Andrea Giacometti
- Institute of Infectious Disease and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Federico Mocchegiani
- Department of Experimental and Clinical Medicine, Università Politecnica delle Marche, Ancona, Italy
| | - Paolo Pelaia
- Anaesthesia and Intensive Care Unit, Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Mauro Provinciali
- Advanced Technology Center for Aging Research, Scientific Technological Area, IRCCS-INRCA, Ancona, Italy
| | - Abele Donati
- Anaesthesia and Intensive Care Unit, Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
- * E-mail:
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Krupka J, May F, Weimer T, Pragst I, Kleinschnitz C, Stoll G, Panousis C, Dickneite G, Nolte MW. The Coagulation Factor XIIa Inhibitor rHA-Infestin-4 Improves Outcome after Cerebral Ischemia/Reperfusion Injury in Rats. PLoS One 2016; 11:e0146783. [PMID: 26815580 PMCID: PMC4731395 DOI: 10.1371/journal.pone.0146783] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 12/22/2015] [Indexed: 11/18/2022] Open
Abstract
Background and Purpose Ischemic stroke provokes severe brain damage and remains a predominant disease in industrialized countries. The coagulation factor XII (FXII)-driven contact activation system plays a central, but not yet fully defined pathogenic role in stroke development. Here, we investigated the efficacy of the FXIIa inhibitor rHA-Infestin-4 in a rat model of ischemic stroke using both a prophylactic and a therapeutic approach. Methods For prophylactic treatment, animals were treated intravenously with 100 mg/kg rHA-Infestin-4 or an equal volume of saline 15 min prior to transient middle cerebral artery occlusion (tMCAO) of 90 min. For therapeutic treatment, 100 mg/kg rHA-Infestin-4, or an equal volume of saline, was administered directly after the start of reperfusion. At 24 h after tMCAO, rats were tested for neurological deficits and blood was drawn for coagulation assays. Finally, brains were removed and analyzed for infarct area and edema formation. Results Within prophylactic rHA-Infestin-4 treatment, infarct areas and brain edema formation were reduced accompanied by better neurological scores and survival compared to controls. Following therapeutic treatment, neurological outcome and survival were still improved although overall effects were less pronounced compared to prophylaxis. Conclusions With regard to the central role of the FXII-driven contact activation system in ischemic stroke, inhibition of FXIIa may represent a new and promising treatment approach to prevent cerebral ischemia/reperfusion injury.
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Affiliation(s)
| | | | | | | | | | - Guido Stoll
- University of Würzburg, Department of Neurology, Würzburg, Germany
| | - Con Panousis
- CSL Limited, Bio21 Institute, Parkville, Victoria, Australia
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Li L, Guo Q, Liu J, Zhang J, Yin Y, Dong D, Fu L, Xu J, Chen W. Recombinant HSA-CMG2 Is a Promising Anthrax Toxin Inhibitor. Toxins (Basel) 2016; 8:toxins8010028. [PMID: 26805881 PMCID: PMC4728550 DOI: 10.3390/toxins8010028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/25/2015] [Accepted: 01/13/2016] [Indexed: 12/20/2022] Open
Abstract
Anthrax toxin is the major virulence factor produced by Bacillus anthracis. Protective antigen (PA) is the key component of the toxin and has been confirmed as the main target for the development of toxin inhibitors. The inhibition of the binding of PA to its receptor, capillary morphogenesis protein-2 (CMG2), can effectively block anthrax intoxication. The recombinant, soluble von Willebrand factor type A (vWA) domain of CMG2 (sCMG2) has demonstrated potency against anthrax toxin. However, the short half-life of sCMG2 in vivo is a disadvantage for its development as a new anthrax drug. In the present study, we report that HSA-CMG2, a protein combining human serum albumin (HSA) and sCMG2, produced in the Pichia pastoris expression system prolonged the half-life of sCMG2 while maintaining PA binding ability. The IC50 of HSA-CMG2 is similar to those of sCMG2 and CMG2-Fc in in vitro toxin neutralization assays, and HSA-CMG2 completely protects rats from lethal doses of anthrax toxin challenge; these same challenge doses exceed sCMG2 at a sub-equivalent dose ratio and overwhelm CMG2-Fc. Our results suggest that HSA-CMG2 is a promising inhibitor of anthrax toxin and may contribute to the development of novel anthrax drugs.
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Affiliation(s)
- Liangliang Li
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
- Center for Disease Control and Prevention of Navy, Beijing 101113, China.
| | - Qiang Guo
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Ju Liu
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Jun Zhang
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Ying Yin
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Dayong Dong
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Ling Fu
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Junjie Xu
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
| | - Wei Chen
- Laboratory of Vaccine and Antibody Engineering, Beijing Institute of Biotechnology, Beijing 100071, China.
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Maltais JS, Simard E, Froehlich U, Denault JB, Gendron L, Grandbois M. iRAGE as a novel carboxymethylated peptide that prevents advanced glycation end product-induced apoptosis and endoplasmic reticulum stress in vascular smooth muscle cells. Pharmacol Res 2015; 104:176-85. [PMID: 26707030 DOI: 10.1016/j.phrs.2015.12.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 11/06/2015] [Accepted: 12/15/2015] [Indexed: 01/11/2023]
Abstract
Advanced glycation end-products (AGE) and the receptor for AGE (RAGE) have been linked to numerous diabetic vascular complications. RAGE activation promotes a self-sustaining state of chronic inflammation and has been shown to induce apoptosis in various cell types. Although previous studies in vascular smooth muscle cells (VSMC) showed that RAGE activation increases vascular calcification and interferes with their contractile phenotype, little is known on the potential of RAGE to induce apoptosis in VSMC. Using a combination of apoptotic assays, we showed that RAGE stimulation with its ligand CML-HSA promotes apoptosis of VSMC. The formation of stress granules and the increase in the level of the associated protein HuR point toward RAGE-dependent endoplasmic reticulum (ER) stress, which is proposed as a key contributor of RAGE-induced apoptosis in VSMC as it has been shown to promote cell death via numerous mechanisms, including up-regulation of caspase-9. Chronic NF-κB activation and modulation of Bcl-2 homologs are also suspected to contribute to RAGE-dependent apoptosis in VSMC. With the goal of reducing RAGE signaling and its detrimental impact on VSMC, we designed a RAGE antagonist (iRAGE) derived from the primary amino acid sequence of HSA. The resulting CML peptide was selected for the high glycation frequency of the primary sequence in the native protein in vivo. Pretreatment with iRAGE blocked 69.6% of the increase in NF-κB signaling caused by RAGE activation with CML-HSA after 48h. Preincubation with iRAGE was successful in reducing RAGE-induced apoptosis, as seen through enhanced cell survival by SPR and reduced PARP cleavage. Activation of executioner caspases was 63.5% lower in cells treated with iRAGE before stimulation with CML-HSA. To our knowledge, iRAGE is the first antagonist shown to block AGE-RAGE interaction and we propose the molecule as an initial candidate for drug discovery.
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Affiliation(s)
- Jean-Sébastien Maltais
- Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, 3001 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Elie Simard
- Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, 3001 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Ulrike Froehlich
- Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, 3001 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Jean-Bernard Denault
- Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, 3001 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Louis Gendron
- Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, 3001 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Michel Grandbois
- Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, 3001 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada.
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Rong P, Huang P, Liu Z, Lin J, Jin A, Ma Y, Niu G, Yu L, Zeng W, Wang W, Chen X. Protein-based photothermal theranostics for imaging-guided cancer therapy. Nanoscale 2015; 7:16330-6. [PMID: 26382146 PMCID: PMC4599582 DOI: 10.1039/c5nr04428f] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The development of imageable photothermal theranostics has attracted considerable attention for imaging guided photothermal therapy (PTT) with high tumor ablation accuracy. In this study, we strategically constructed a near-infrared (NIR) cyanine dye by introducing a rigid cyclohexenyl ring to the heptamethine chain to obtain a heptamethine dye CySCOOH with high fluorescence intensity and good stability. By covalent conjugation of CySCOOH onto human serum albumin (HSA), the as-prepared HSA@CySCOOH nanoplatform is highly efficient for NIR fluorescence/photoacoustic/thermal multimodality imaging and photothermal tumor ablation. The theranostic capability of HSA@CySCOOH was systematically evaluated both in vitro and in vivo. Most intriguingly, complete tumor elimination was achieved by intravenous injection of HSA@CySCOOH (CySCOOH, 1 mg kg(-1); 808 nm, 1.0 W cm(-2) for 5 min) into 4T1 tumor-bearing mice, with no weight loss, noticeable toxicity, or tumor recurrence being observed. This as-prepared protein-based nanotheranostics exhibits high water dispersibility, no off target cytotoxicity, and good biodegradability and biocompatibility, thus facilitating its clinical translation to cancer photothermal theranostics.
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Affiliation(s)
- Pengfei Rong
- Department of Radiology, the Third Xiangya Hospital, Central South University, Changsha, 410013, PR China
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Peng Huang
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Shenzhen, China, 518060
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
- Corresponding authors: (P. Huang); (W. Wang); (W. Zeng); or (X. Chen)
| | - Zhiguo Liu
- School of Pharmaceutical Sciences, Central South University, Changsha, 410013, PR China
| | - Jing Lin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Albert Jin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Ying Ma
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Lun Yu
- School of Pharmaceutical Sciences, Central South University, Changsha, 410013, PR China
| | - Wenbin Zeng
- School of Pharmaceutical Sciences, Central South University, Changsha, 410013, PR China
- Corresponding authors: (P. Huang); (W. Wang); (W. Zeng); or (X. Chen)
| | - Wei Wang
- Department of Radiology, the Third Xiangya Hospital, Central South University, Changsha, 410013, PR China
- Corresponding authors: (P. Huang); (W. Wang); (W. Zeng); or (X. Chen)
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
- Corresponding authors: (P. Huang); (W. Wang); (W. Zeng); or (X. Chen)
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Fredrickson J, Krisher R, Morbeck DE. The impact of the protein stabilizer octanoic acid on embryonic development and fetal growth in a murine model. J Assist Reprod Genet 2015; 32:1517-24. [PMID: 26342329 DOI: 10.1007/s10815-015-0560-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 08/20/2015] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The purpose of this study was to determine the effect of the protein stabilizer octanoic acid on blastocyst development, implantation, and fetal growth in a murine model. METHODS One-cell mouse embryos were collected and individually cultured in medium supplemented with recombinant human serum albumin for 96 h at 5 % oxygen in an EmbryoScope. Embryos were randomly allocated to four octanoic acid groups (0, 400, 800, or 1200 μM). Blastocyst development and cell cycle timings were calculated at 96 h of culture, and experiments were repeated in triplicate. Blastocysts were stained and fixed at 96 h for differential cell counts. Following 96 h of culture, blastocysts were transferred to recipients to determine implantation rates and fetal and placental weights. RESULTS Blastocyst development, hatching rates, developmental kinetics, and total number of cells were negatively affected by octanoic acid at concentrations commonly used in human IVF. Implantation was not affected by octanoic acid but fetal and placental weights at 800 μM octanoic acid were increased relative to control. CONCLUSIONS Octanoic acid, a standard additive to human protein supplements used in IVF, can have long-term negative effects on embryonic and fetal development. The use of octanoic acid for human embryo culture should be monitored and reduced.
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Affiliation(s)
| | - Rebecca Krisher
- National Foundation for Fertility Research, Lone Tree, CO, USA
| | - Dean E Morbeck
- Division of Reproductive Endocrinology and Infertility, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA.
- Division of Laboratory Genetics, Mayo Clinic, Rochester, MN, USA.
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Sablón-Carrazana M, Fernández I, Bencomo A, Lara-Martínez R, Rivera-Marrero S, Domínguez G, Pérez-Perera R, Jiménez-García LF, Altamirano-Bustamante NF, Diaz-Delgado M, Vedrenne F, Rivillas-Acevedo L, Pasten-Hidalgo K, Segura-Valdez MDL, Islas-Andrade S, Garrido-Magaña E, Perera-Pintado A, Prats-Capote A, Rodríguez-Tanty C, Altamirano-Bustamante MM. Drug Development in Conformational Diseases: A Novel Family of Chemical Chaperones that Bind and Stabilise Several Polymorphic Amyloid Structures. PLoS One 2015; 10:e0135292. [PMID: 26327208 PMCID: PMC4556714 DOI: 10.1371/journal.pone.0135292] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 07/20/2015] [Indexed: 11/18/2022] Open
Abstract
The increasing prevalence of conformational diseases, including Alzheimer's disease, type 2 Diabetes Mellitus and Cancer, poses a global challenge at many different levels. It has devastating effects on the sufferers as well as a tremendous economic impact on families and the health system. In this work, we apply a cross-functional approach that combines ideas, concepts and technologies from several disciplines in order to study, in silico and in vitro, the role of a novel chemical chaperones family (NCHCHF) in processes of protein aggregation in conformational diseases. Given that Serum Albumin (SA) is the most abundant protein in the blood of mammals, and Bovine Serum Albumin (BSA) is an off-the-shelf protein available in most labs around the world, we compared the ligandability of BSA:NCHCHF with the interaction sites in the Human Islet Amyloid Polypeptide (hIAPP):NCHCHF, and in the amyloid pharmacophore fragments (Aβ17-42 and Aβ16-21):NCHCHF. We posit that the merging of this interaction sites is a meta-structure of pharmacophore which allows the development of chaperones that can prevent protein aggregation at various states from: stabilizing the native state to destabilizing oligomeric state and protofilament. Furthermore to stabilize fibrillar structures, thus decreasing the amount of toxic oligomers in solution, as is the case with the NCHCHF. The paper demonstrates how a set of NCHCHF can be used for studying and potentially treating the various physiopathological stages of a conformational disease. For instance, when dealing with an acute phase of cytotoxicity, what is needed is the recruitment of cytotoxic oligomers, thus chaperone F, which accelerates fiber formation, would be very useful; whereas in a chronic stage it is better to have chaperones A, B, C, and D, which stabilize the native and fibril structures halting self-catalysis and the creation of cytotoxic oligomers as a consequence of fiber formation. Furthermore, all the chaperones are able to protect and recondition the cerebellar granule cells (CGC) from the cytotoxicity produced by the hIAPP20-29 fragment or by a low potassium medium, regardless of their capacity for accelerating or inhibiting in vitro formation of fibers. In vivo animal experiments are required to study the impact of chemical chaperones in cognitive and metabolic syndromes.
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Affiliation(s)
- Marquiza Sablón-Carrazana
- Dpto. Neurodiagnóstico, Centro de Neurociencias de Cuba, Cubanacán, Playa, La Habana, Cuba
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
| | - Isaac Fernández
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México D.F., México
| | - Alberto Bencomo
- Dpto. Neurodiagnóstico, Centro de Neurociencias de Cuba, Cubanacán, Playa, La Habana, Cuba
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
| | - Reyna Lara-Martínez
- Laboratorio de Nanobiología Celular, Departamento de Biología Celular, Facultad de Ciencias, UNAM, México D.F., México
| | | | | | - Rafaela Pérez-Perera
- Dpto. Neurodiagnóstico, Centro de Neurociencias de Cuba, Cubanacán, Playa, La Habana, Cuba
| | - Luis Felipe Jiménez-García
- Laboratorio de Nanobiología Celular, Departamento de Biología Celular, Facultad de Ciencias, UNAM, México D.F., México
| | | | - Massiel Diaz-Delgado
- Dpto. Neurodiagnóstico, Centro de Neurociencias de Cuba, Cubanacán, Playa, La Habana, Cuba
| | - Fernand Vedrenne
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
| | - Lina Rivillas-Acevedo
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
| | - Karina Pasten-Hidalgo
- Servicio de Endocrinología, Instituto Nacional de Pediatría, SS, México D.F., México
- Cátedra Conacyt, México D.F., México
| | | | - Sergio Islas-Andrade
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
| | | | | | | | - Chryslaine Rodríguez-Tanty
- Dpto. Neurodiagnóstico, Centro de Neurociencias de Cuba, Cubanacán, Playa, La Habana, Cuba
- * E-mail: (CR-T); (MMA-B)
| | - Myriam M. Altamirano-Bustamante
- Unidad de Investigación Médica en Enfermedades Metabólicas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México D.F., México
- * E-mail: (CR-T); (MMA-B)
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Xie B, Dong X, Wang Y, Sun Y. Multifunctionality of Acidulated Serum Albumin on Inhibiting Zn²⁺-Mediated Amyloid β-Protein Fibrillogenesis and Cytotoxicity. Langmuir 2015; 31:7374-7380. [PMID: 26070334 DOI: 10.1021/acs.langmuir.5b01108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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
Fibrillogenesis of amyloid β-proteins (Aβ) mediated by transition-metal ions such as Zn(2+) in neuronal cells plays a causative role in Alzheimer's disease. Hence, it is highly desired to design multifunctional agents capable of inhibiting Aβ aggregation and modulating metal-Aβ species. In this study, we fabricated acidulated human serum albumin (A-HSA) as a multifunctional agent for binding Zn(2+) and modulating Zn(2+)-mediated Aβ fibrillogenesis and cytotoxicity. On average, 19.5 diglycolic anhydrides were modified onto the surface of human serum albumin (HSA). It was confirmed that A-HSA kept the stability and biocompatibility of native HSA. Moreover, it could inhibit Aβ42 fibrillogenesis and change the pathway of Zn(2+)-mediated Aβ42 aggregation, as demonstrated by extensive biophysical assays. In addition, upon incubation with A-HSA, the cytotoxicity presented by Zn(2+)-Aβ42 aggregates was significantly mitigated in living cells. The results showed that A-HSA had much stronger inhibitory effect on Zn(2+)-mediated Aβ42 fibrillogenesis and cytotoxicity than equimolar HSA. Isothermal titration calorimetry and stopped-flow fluorescence measurements were then performed to investigate the working mechanism of A-HSA. The studies showed that the A-HSA surface, with more negative charges, not only had stronger affinity for Zn(2+) but also might decrease the binding affinity of Aβ42 for Zn(2+). Moreover, hydrophobic binding and electrostatic repulsion could work simultaneously on the bound Aβ42 on the A-HSA surface. As a result, Aβ42 conformations could be stretched, which avoided the formation of toxic Zn(2+)-Aβ42 aggregates. The research thus revealed that A-HSA is a multifunctional agent capable of altering the pathway of Zn(2+)-mediated Aβ42 aggregation and greatly mitigating the amyloid cytotoxicity.
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Affiliation(s)
- Baolong Xie
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xiaoyan Dong
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yongjian Wang
- ‡Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yan Sun
- †Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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Nirala BK, Perumal V, Gohil NK. Glycated serum albumin stimulates expression of endothelial cell specific molecule-1 in human umbilical vein endothelial cells: Implication in diabetes mediated endothelial dysfunction. Diab Vasc Dis Res 2015; 12:290-7. [PMID: 25963575 DOI: 10.1177/1479164115583192] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Pro-inflammatory conditions induced by products of protein glycation in diabetes substantially enhance the risk of endothelial dysfunction and related vascular complications. Endothelial cell specific molecule-1 (ESM-1) or endocan has been demonstrated as a potential biomarker in cancer and sepsis. Its role in diabetes-induced pathologies remains unknown. The expression of ESM-1 gene is under cytokine regulation, indicating its role in endothelium-dependent pathological disorders. In this study, we investigated the effect of advanced glycated human serum albumin (AGE-HSA) on the production of ESM-1. We show that AGE-HSA exerts a modulating role on the expression of ESM-1 in human umbilical vein endothelial cells. It up-regulates expression of ESM-1 protein in a dose-dependent manner which correlates with its messenger RNA (mRNA) transcription. RAGE and galectin-3, both AGE receptors, show antagonistic action on its expression. While gene silencing of RAGE has down-regulatory effect, that of galectin-3 has up-regulatory effect on AGE-induced expression of ESM-1. Inhibition of MAPKKK and JNK pathways did not alter the expression. In contrast, phosphatidylinositol 3 kinase (PI3K) inhibition significantly up-regulated ESM-1 expression. In conclusion, these results suggest that AGE-induced activation of human umbilical vein endothelial cells promotes formation of endocan which is an endothelial dysfunction marker and may be related to vascular disease in diabetes.
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Affiliation(s)
- Bikesh K Nirala
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Vivekanandan Perumal
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, India
| | - Nivedita K Gohil
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India
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Bar-Or D, Thomas GW, Rael LT, Gersch ED, Rubinstein P, Brody E. Low Molecular Weight Fraction of Commercial Human Serum Albumin Induces Morphologic and Transcriptional Changes of Bone Marrow-Derived Mesenchymal Stem Cells. Stem Cells Transl Med 2015; 4:945-55. [PMID: 26041739 DOI: 10.5966/sctm.2014-0293] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 04/13/2015] [Indexed: 12/27/2022] Open
Abstract
Osteoarthritis (OA) is the most common chronic disease of the joint; however, the therapeutic options for severe OA are limited. The low molecular weight fraction of commercial 5% human serum albumin (LMWF5A) has been shown to have anti-inflammatory properties that are mediated, in part, by a diketopiperazine that is present in the albumin preparation and that was demonstrated to be safe and effective in reducing pain and improving function when administered intra-articularly in a phase III clinical trial. In the present study, bone marrow-derived mesenchymal stem cells (BMMSCs) exposed to LMWF5A exhibited an elongated phenotype with diffuse intracellular F-actin, pronounced migratory leading edges, and filopodia-like projections. In addition, LMWF5A promoted chondrogenic condensation in "micromass" culture, concurrent with the upregulation of collagen 2α1 mRNA. Furthermore, the transcription of the CXCR4-CXCL12 axis was significantly regulated in a manner conducive to migration and homing. Several transcription factors involved in stem cell differentiation were also found to bind oligonucleotide response element probes following exposure to LMWF5A. Finally, a rapid increase in PRAS40 phosphorylation was observed following treatment, potentially resulting in the activation mTORC1. Proteomic analysis of synovial fluid taken from a preliminary set of patients indicated that at 12 weeks following administration of LMWF5A, a microenvironment exists in the knee conducive to stem cell infiltration, self-renewal, and differentiation, in addition to indications of remodeling with a reduction in inflammation. Taken together, these findings imply that LMWF5A treatment may prime stem cells for both mobilization and chondrogenic differentiation, potentially explaining some of the beneficial effects achieved in clinical trials.
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Affiliation(s)
- David Bar-Or
- Swedish Medical Center, Trauma Research Department, Englewood, Colorado, USA; St. Anthony Hospital, Trauma Research Department, Lakewood, Colorado, USA; Medical Center of Plano, Trauma Research Department, Plano, Texas, USA; Ampio Pharmaceuticals Inc., Englewood, Colorado, USA; New York Blood Center, New York, New York, USA; SomaLogic Inc., Boulder, Colorado, USA
| | - Gregory W Thomas
- Swedish Medical Center, Trauma Research Department, Englewood, Colorado, USA; St. Anthony Hospital, Trauma Research Department, Lakewood, Colorado, USA; Medical Center of Plano, Trauma Research Department, Plano, Texas, USA; Ampio Pharmaceuticals Inc., Englewood, Colorado, USA; New York Blood Center, New York, New York, USA; SomaLogic Inc., Boulder, Colorado, USA
| | - Leonard T Rael
- Swedish Medical Center, Trauma Research Department, Englewood, Colorado, USA; St. Anthony Hospital, Trauma Research Department, Lakewood, Colorado, USA; Medical Center of Plano, Trauma Research Department, Plano, Texas, USA; Ampio Pharmaceuticals Inc., Englewood, Colorado, USA; New York Blood Center, New York, New York, USA; SomaLogic Inc., Boulder, Colorado, USA
| | - Elizabeth D Gersch
- Swedish Medical Center, Trauma Research Department, Englewood, Colorado, USA; St. Anthony Hospital, Trauma Research Department, Lakewood, Colorado, USA; Medical Center of Plano, Trauma Research Department, Plano, Texas, USA; Ampio Pharmaceuticals Inc., Englewood, Colorado, USA; New York Blood Center, New York, New York, USA; SomaLogic Inc., Boulder, Colorado, USA
| | - Pablo Rubinstein
- Swedish Medical Center, Trauma Research Department, Englewood, Colorado, USA; St. Anthony Hospital, Trauma Research Department, Lakewood, Colorado, USA; Medical Center of Plano, Trauma Research Department, Plano, Texas, USA; Ampio Pharmaceuticals Inc., Englewood, Colorado, USA; New York Blood Center, New York, New York, USA; SomaLogic Inc., Boulder, Colorado, USA
| | - Edward Brody
- Swedish Medical Center, Trauma Research Department, Englewood, Colorado, USA; St. Anthony Hospital, Trauma Research Department, Lakewood, Colorado, USA; Medical Center of Plano, Trauma Research Department, Plano, Texas, USA; Ampio Pharmaceuticals Inc., Englewood, Colorado, USA; New York Blood Center, New York, New York, USA; SomaLogic Inc., Boulder, Colorado, USA
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Klütsch K, Heidland A. The influence of various volume expanders on renal function during hypo- and normovolemia. Bibl Haematol 2015; 33:380-97. [PMID: 5384007 DOI: 10.1159/000384860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Rieger A. Changes in blood volume and plasma proteins after trauma and immediate substitution with different substitutes. Bibl Haematol 2015; 33:159-70. [PMID: 5377190 DOI: 10.1159/000384838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Sun J, Huang Y, Zheng C, Zhou Y, Liu Y, Liu J. Ruthenium (II) complexes interact with human serum albumin and induce apoptosis of tumor cells. Biol Trace Elem Res 2015; 163:266-74. [PMID: 25398541 DOI: 10.1007/s12011-014-0165-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 10/24/2014] [Indexed: 10/24/2022]
Abstract
The interaction of ruthenium (II) complex [Ru(bpy)2(mal)](2+) (RBM) and [Ru(phen)2(mal)](2+) (RPM) (bpy = 2, 2-bipyridine, phen = 1,10-phenanthroline, mal = malonyl carboxylate) with human serum albumin (HSA) has been investigated by using fluorescence, UV absorption and circular dichroism (CD) spectroscopy approaches. A strong fluorescence quenching reaction of complexes to HSA was observed and the quenching mechanism was suggested as static quenching according to the Stern-Volmer (S-V) equation. The number of binding sites n and observed binding constant Kb was measured by fluorescence quenching method. The thermodynamic parameters ΔH, ΔS, and ΔG at different temperatures were calculated and the results indicate the binding reaction is mainly entropy-driven and Vander Waals force played a major role in the reaction. The result of CD showed that the secondary structure of HSA molecules was changed in the presence of the ruthenium (II) complexes. Furthermore, the cell viability of ruthenium (II) complexes was evaluated by MTT and complex RPM has shown significant higher anticancer potency than RBM against all the cell lines screened. RPM showed a significant antitumor activity through induction of apoptosis in A549 cells.
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Affiliation(s)
- Jing Sun
- Department of Chemistry, Jinan University, Guangzhou, 510632, People's Republic of China
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Lobo MVT, Arenas MI, Huerta L, Sacristán S, Pérez-Crespo M, Gutiérrez-Adán A, Díaz-Gil JJ, Lasunción MA, Martín-Hidalgo A. Liver growth factor induces testicular regeneration in EDS-treated rats and increases protein levels of class B scavenger receptors. Am J Physiol Endocrinol Metab 2015; 308:E111-21. [PMID: 25389365 DOI: 10.1152/ajpendo.00329.2014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of the present work was to determine the effects of liver growth factor (LGF) on the regeneration process of rat testes after chemical castration induced by ethane dimethanesulfonate (EDS) by analyzing some of the most relevant proteins involved in cholesterol metabolism, such as hormone sensitive lipase (HSL), 3β-hydroxysteroid dehydrogenase (3β-HSD), scavenger receptor SR-BI, and other components of the SR family that could contribute to the recovery of steroidogenesis and spermatogenesis in the testis. Sixty male rats were randomized to nontreated (controls) and LGF-treated, EDS-treated, and EDS + LGF-treated groups. Testes were obtained on days 10 (T1), 21 (T2), and 35 (T3) after EDS treatment, embedded in paraffin, and analyzed by immunohistochemistry and Western blot. LGF improved the recovery of the seminiferous epithelia, the appearance of the mature pattern of Leydig cell interstitial distribution, and the expression of mature SR-BI. Moreover, LGF treatment resulted in partial recovery of HSL expression in Leydig cells and spermatogonia. No changes in serum testosterone were observed in control or LGF-treated rats, but in EDS-castrated animals LGF treatment induced a progressive increase in serum testosterone levels and 3β-HSD expression. Based on the pivotal role of SR-BI in the uptake of cholesteryl esters from HDL, it is suggested that the observed effects of LGF would facilitate the provision of cholesterol for sperm cell growth and Leydig cell recovery.
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Affiliation(s)
- M V T Lobo
- Departamento de Biomedicina y Biotecnología, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - M I Arenas
- Departamento de Biomedicina y Biotecnología, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - L Huerta
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - S Sacristán
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - M Pérez-Crespo
- Departamento de Reproducción Animal y Conservación de Recursos Zoogenéticos, INIA, Madrid, Spain; and
| | - A Gutiérrez-Adán
- Departamento de Reproducción Animal y Conservación de Recursos Zoogenéticos, INIA, Madrid, Spain; and
| | - J J Díaz-Gil
- Servicio de Bioquímica Experimental, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
| | - M A Lasunción
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - A Martín-Hidalgo
- Servicio de Bioquímica-Departamento Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, CIBER de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain;
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Girón-Martínez Á, Pérez-Rial S, Terrón-Expósito R, Díaz-Gil JJ, González-Mangado N, Peces-Barba G. Proliferative activity of liver growth factor is associated with an improvement of cigarette smoke-induced emphysema in mice. PLoS One 2014; 9:e112995. [PMID: 25401951 PMCID: PMC4234533 DOI: 10.1371/journal.pone.0112995] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 10/17/2014] [Indexed: 01/06/2023] Open
Abstract
Cigarette smoke (CS)-induced emphysema is a major component of chronic obstructive pulmonary disease (COPD). COPD treatment is based on the administration of bronchodilators and corticosteroids to control symptoms and exacerbations, however, to date, there are no effective therapies to reverse disease progression. Liver growth factor (LGF) is an albumin-bilirubin complex with mitogenic properties, whose therapeutic effects have previously been reported in a model of emphysema and several rodent models of human disease. To approach the therapeutic effect of LGF in a model of previously established emphysema, morphometric and lung function parameters, matrix metalloproteinase (MMP) activity and the expression of several markers, such as VEGF, PCNA, 3NT and Nrf2, were assessed in air-exposed and CS-exposed C57BL/6J male mice with and without intraperitoneal (i.p.) injection of LGF. CS-exposed mice presented a significant enlargement of alveolar spaces, higher alveolar internal area and loss of lung function that correlated with higher MMP activity, higher expression of 3NT and lower expression of VEGF. CS-exposed mice injected with LGF, showed an amelioration of emphysema and improved lung function, which correlated with lower MMP activity and 3NT expression and higher levels of VEGF, PCNA and Nrf2. Taken together, this study suggests that LGF administration ameliorates CS-induced emphysema, highlights the ability of LGF to promote alveolar cell proliferation and may be a promising strategy to revert COPD progression.
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Affiliation(s)
- Álvaro Girón-Martínez
- Respiratory Research Group, Instituto de Investigación Sanitaria - Fundación Jiménez Díaz - CIBERES, Universidad Autónoma de Madrid (IIS-FJD-CIBERES-UAM), Madrid, Spain
- * E-mail:
| | - Sandra Pérez-Rial
- Respiratory Research Group, Instituto de Investigación Sanitaria - Fundación Jiménez Díaz - CIBERES, Universidad Autónoma de Madrid (IIS-FJD-CIBERES-UAM), Madrid, Spain
| | - Raúl Terrón-Expósito
- Respiratory Research Group, Instituto de Investigación Sanitaria - Fundación Jiménez Díaz - CIBERES, Universidad Autónoma de Madrid (IIS-FJD-CIBERES-UAM), Madrid, Spain
| | - Juan José Díaz-Gil
- Respiratory Research Group, Instituto de Investigación Sanitaria - Fundación Jiménez Díaz - CIBERES, Universidad Autónoma de Madrid (IIS-FJD-CIBERES-UAM), Madrid, Spain
| | - Nicolás González-Mangado
- Respiratory Research Group, Instituto de Investigación Sanitaria - Fundación Jiménez Díaz - CIBERES, Universidad Autónoma de Madrid (IIS-FJD-CIBERES-UAM), Madrid, Spain
| | - Germán Peces-Barba
- Respiratory Research Group, Instituto de Investigación Sanitaria - Fundación Jiménez Díaz - CIBERES, Universidad Autónoma de Madrid (IIS-FJD-CIBERES-UAM), Madrid, Spain
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Abstract
OBJECTIVE To investigate the lethal activity of photoactivated disinfection (PAD) on Enterococcus faecalis (ATCC 29212) and mixed populations of aerobic or anaerobic bacteria in infected root canals using a diode laser after the application of a photosensitizer (PS). MATERIALS AND METHODS First, the bactericidal activity of a low power diode laser (200 mW) against E. faecalis ATCC 29212 pre-treated with a PS (toluidine blue) for 2 min were examined after different irradiation times (30 s, 60 s and 90 s). The bactericidal activity in the presence of human serum or human serum albumin (HSA) was also examined. Second, root canals were infected with E. faecalis or with mixed aerobic or anaerobic microbial populations for 3 days and then irrigated with 1.5% sodium hypochlorite and exposed to PAD for 60 s. RESULTS Photosensitization followed by laser irradiation for 60 s was sufficient to kill E. faecalis. Bacteria suspended in human serum (25% v/v) were totally eradicated after 30 s of irradiation. The addition of HSA (25 mg/ml or 50 mg/ml) to bacterial suspensions increased the antimicrobial efficacy of PAD after an irradiation time of 30 s, but no longer. The bactericidal effect of sodium hypochlorite was only enhanced by PAD during the early stages of treatment. PAD did not enhance the activity of sodium hypochlorite against a mixture of anaerobic bacteria. CONCLUSIONS The bactericidal activity of PAD appears to be enhanced by serum proteins in vitro, but is limited to bacteria present within the root canal.
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Affiliation(s)
- Ulrich Schiffner
- Center for Oral and Dental Medicine, Department of Restorative and Preventive Dentistry, University Center Hamburg-Eppendorf , Hamburg , Germany
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Morbeck DE, Paczkowski M, Fredrickson JR, Krisher RL, Hoff HS, Baumann NA, Moyer T, Matern D. Composition of protein supplements used for human embryo culture. J Assist Reprod Genet 2014; 31:1703-11. [PMID: 25261352 DOI: 10.1007/s10815-014-0349-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 09/15/2014] [Indexed: 01/26/2023] Open
Abstract
PURPOSE To determine the composition of commercially available protein supplements for embryo culture media and test if differences in protein supplement composition are biologically relevant in a murine model. METHODS Amino acid, organic acid, ion and metal content were determined for 6 protein supplements: recombinant human albumin (AlbIX), human serum albumin (HSA and Buminate), and three complex protein supplements (SSS, SPS, LGPS). To determine if differences in the composition of these supplements are biologically relevant, mouse one-cell embryos were collected and cultured for 120 hours in each protein supplement in Global media at 5 and 20 % oxygen in an EmbryoScope time-lapse incubator. The compositions of six protein supplements were analyzed for concentrations of 39 individual amino acids, organic acids, ions and elements. Blastocyst development and cell cycle timings were calculated at 96-hours of culture and the experiments were repeated in triplicate. Blastocyst gene expression was analyzed. RESULTS Recombinant albumin had the fewest undefined components , the lowest concentration of elements detected, and resulted in high blastocyst development in both 5 and 20 % oxygen. Buminate, LGPS and SPS had high levels of transition metals whereas SSS had high concentrations of amino acids. Pre-compaction mouse embryo development was delayed relative to embryos in AlbIX for all supplements and blastocyst formation was reduced in Buminate, SPS and SSS. CONCLUSIONS The composition of protein supplements are variable, consisting of previously undescribed components. High concentrations of pro-oxidant transition metals were most notable. Blastocyst development was protein dependent and showed an interaction with oxygen concentration and pro-oxidant supplements.
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Affiliation(s)
- Dean E Morbeck
- Department of Obstetrics and Gynecology, Mayo Clinic, Charlton 3A, Rochester, MN, 55905, USA,
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Fu K, Cheng Q, Liu Z, Chen Z, Wang Y, Ruan H, Zhou L, Xiong J, Xiao R, Liu S, Zhang Q, Yang D. Immunotoxicity assessment of rice-derived recombinant human serum albumin using human peripheral blood mononuclear cells. PLoS One 2014; 9:e104426. [PMID: 25099245 PMCID: PMC4123919 DOI: 10.1371/journal.pone.0104426] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 07/08/2014] [Indexed: 11/19/2022] Open
Abstract
Human serum albumin (HSA) is extensively used in clinics to treat a variety of diseases, such as hypoproteinemia, hemorrhagic shock, serious burn injuries, cirrhotic ascites and fetal erythroblastosis. To address supply shortages and high safety risks from limited human donors, we recently developed recombinant technology to produce HSA from rice endosperm. To assess the risk potential of HSA derived from Oryza sativa (OsrHSA) before a First-in-human (FIH) trial, we compared OsrHSA and plasma-derived HSA (pHSA), evaluating the potential for an immune reaction and toxicity using human peripheral blood mononuclear cells (PBMCs). The results indicated that neither OsrHSA nor pHSA stimulated T cell proliferation at 1x and 5x dosages. We also found no significant differences in the profiles of the CD4(+) and CD8(+) T cell subsets between OsrHSA- and pHSA-treated cells. Furthermore, the results showed that there were no significant differences between OsrHSA and pHSA in the production of cytokines such as interferon-gamma (IFN-γ), tumor necrosis factor-alpha (TNF-α), interleukin (IL)-10 and IL-4. Our results demonstrated that OsrHSA has equivalent immunotoxicity to pHSA when using the PBMC model. Moreover, this ex vivo system could provide an alternative approach to predict potential risks in novel biopharmaceutical development.
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Affiliation(s)
- Kai Fu
- State Key Laboratory of Hybrid Rice and College of Life Sciences, Wuhan University, Wuhan, China
| | - Qin Cheng
- State Key Laboratory of Hybrid Rice and College of Life Sciences, Wuhan University, Wuhan, China
| | - Zhenwei Liu
- State Key Laboratory of Hybrid Rice and College of Life Sciences, Wuhan University, Wuhan, China
| | - Zhen Chen
- State Key Laboratory of Hybrid Rice and College of Life Sciences, Wuhan University, Wuhan, China
| | - Yan Wang
- Institute of Hydrobiology, Chinese Academy of Sciences, Analysis and Testing center, Wuhan, China
| | - Honggang Ruan
- Department of Immunology, College of Basic Medical Science, Wuhan University, Wuhan, China
| | - Lu Zhou
- Department of Immunology, College of Basic Medical Science, Wuhan University, Wuhan, China
| | - Jie Xiong
- Department of Immunology, College of Basic Medical Science, Wuhan University, Wuhan, China
| | - Ruijing Xiao
- Department of Immunology, College of Basic Medical Science, Wuhan University, Wuhan, China
| | - Shengwu Liu
- Department of Immunology, College of Basic Medical Science, Wuhan University, Wuhan, China
| | - Qiuping Zhang
- Department of Immunology, College of Basic Medical Science, Wuhan University, Wuhan, China
| | - Daichang Yang
- State Key Laboratory of Hybrid Rice and College of Life Sciences, Wuhan University, Wuhan, China
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Gonzalo-Gobernado R, Calatrava-Ferreras L, Perucho J, Reimers D, Casarejos MJ, Herranz AS, Jiménez-Escrig A, Díaz-Gil JJ, Bazán E. Liver growth factor as a tissue regenerating factor in neurodegenerative diseases. Recent Pat CNS Drug Discov 2014; 9:173-80. [PMID: 25537484 PMCID: PMC4485410 DOI: 10.2174/1574889809666141224123303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 12/30/2022]
Abstract
Liver growth factor (LGF) is a hepatic mitogen purified by our group in 1986. In the following years we demonstrated its activity both in "in vivo" and "in vitro" systems, stimulating hepatocytes mitogenesis as well as liver regeneration in several models of liver injury. Furthermore, we established its chemical composition (albumin-bilirubin complex) and its mitogenic actions in liver. From 2000 onwards we used LGF as a tissue regenerating factor in several models of extrahepatic diseases. The use of Liver growth factor as a neural tissue regenerator has been recently protected (Patent No US 2014/8,642,551 B2). LGF administration stimulates neurogenesis and neuron survival, promotes migration of newly generated neurons, and induces the outgrowth of striatal dopaminergic terminals in 6-hidroxydopamine-lesioned rats. Furthermore, LGF treatment raises striatal dopamine levels and protects dopaminergic neurons in hemiparkinsonian animals. LGF also stimulates survival of grafted foetal neural stem cells in the damaged striatum, reduces rotational behaviour and improves motor coordination. Interestingly, LGF also exerts a neuroprotective role both in an experimental model of cerebellar ataxia and in a model of Friedrich´s ataxia. Microglia seem to be the cellular target of LGF in the CNS. Moreover, the activity of the factor could be mediated by the stimulation of MAPK´s signalling pathway and by regulating critical proteins for cell survival, such as Bcl-2 and phospho-CREB. Since the factor shows neuroprotective and neurorestorative effects we propose LGF as a patented novel therapeutic tool that may be useful for the treatment of Parkinson´s disease and cerebellar ataxias. Currently, our studies have been extended to other neurological disorders such as Alzheimer's disease (Patent No: US 2014/0113859 A1).
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Affiliation(s)
- Rafael Gonzalo-Gobernado
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | - Lucia Calatrava-Ferreras
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | - Juan Perucho
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | - Diana Reimers
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | - María J. Casarejos
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | - Antonio S. Herranz
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | | | - Juan J. Díaz-Gil
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
| | - Eulalia Bazán
- Servicio de Neurobiología-Investigación, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS). Madrid, 28034, Spain
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Reddy A, Caicedo MS, Samelko L, Jacobs JJ, Hallab NJ. Implant debris particle size affects serum protein adsorption which may contribute to particle size-based bioreactivity differences. J Long Term Eff Med Implants 2014; 24:77-88. [PMID: 24941408 PMCID: PMC4062925 DOI: 10.1615/jlongtermeffmedimplants.2014010118] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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] [Indexed: 01/11/2023]
Abstract
Biologic reactivity to orthopedic implant debris mediates long-term clinical performance of total joint arthroplasty implants. However, the reasons that some facets of implant debris (e.g., particle size, shape, base material, etc.) are more pro-inflammatory remain controversial. This precludes accurate prediction and optimal design of modern total joint replacements. We hypothesized that debris particle size can influence adsorbed protein film composition and affect subsequent bioreactivity. We measured size-dependent proteinfilm adsorption, and adsorbed protein-film-dependent cytokine release using equal surface areas of different sized cobalt-chromium alloy (CoCr-alloy) particles and in vitro challenge of human macrophages (THP-1 and human primary). Smaller (5 μm diameter) versus larger (70 μm diameter) particles preferentially adsorbed more serum protein in general (p<0.03), where higher molecular weight serum proteins consistent with IgG were identified. Additionally, 5-μm CoCr-alloy particles pre-coated with different protein biofilms (IgG vs. albumin) resulted in a difference in cytokine expression in which albumin-coated particles induced more TNF-α release and IgG-coated particles induced more IL-1β release from human monocytes/macrophages. In these preliminary in vitro studies, we have demonstrated the capability of equal surface areas of different particle sizes to influence adsorbed protein composition and that adsorbed protein differences on identical particles can translate into complex differences in bioreactivity. Together, these findings suggest that adsorbed protein differences on different-sized particles of the same material may be a contributing mechanism by which certain particles induce different reactivities.
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Affiliation(s)
- Anand Reddy
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612
| | - Marco S Caicedo
- Orthopedic Analysis, LLC, Chicago, IL 60612; Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612
| | - Lauryn Samelko
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612
| | - Joshua J Jacobs
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612
| | - Nadim James Hallab
- Orthopedic Analysis, LLC, Department of Immunology, Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612
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