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Li J, Guo Y, Ren P, Zhang Y, Han R, Xiong L. Triglyceride-Rich Lipoprotein-Mediated Polymer Dots for Multimodal Imaging Interscapular Brown Adipose Tissue Capillaries. ACS APPLIED MATERIALS & INTERFACES 2023; 15:28981-28992. [PMID: 37289581 DOI: 10.1021/acsami.3c04525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Brown adipose tissues (BATs) have been identified as a promising target of metabolism disorders. [18F]FDG-PET (FDG = fluorodeoxyglucose; PET = positron emission tomography) has been predominantly employed for BAT imaging, but its limitations drive the urgent need for novel functional probes combined with multimodal imaging approaches. It has been reported that polymer dots (Pdots) display rapid BAT imaging without additional cold stimulation. However, the mechanism by which Pdots image BAT remains unclear. Here, we made an intensive study of the imaging mechanism and found that Pdots can bind to triglyceride-rich lipoproteins (TRLs). By virtue of their high affinity to TRLs, Pdots selectively accumulate in capillary endothelial cells (ECs) in interscapular brown adipose tissues (iBATs). Compared to poly(styrene-co-maleic anhydride)cumene terminated (PSMAC)-Pdots with a short half-life and polyethylene glycol (PEG)-Pdots with low lipophilicity, naked-Pdots have good lipophilicity, with a half-life of about 30 min and up to 94% uptake in capillary ECs within 5 min, increasing rapidly after acute cold stimulation. These results suggested that the accumulation changes of Pdots in iBAT can reflect iBAT activity sensitively. Based on this mechanism, we further developed a strategy to detect iBAT activity and quantify the TRL uptake in vivo using multimodal Pdots.
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Affiliation(s)
- Jingru Li
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Yixiao Guo
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Panting Ren
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Yufan Zhang
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Ruijun Han
- Department of Ultrasound, Renji Hospital of Shanghai Jiaotong University, Shanghai 200127, P. R. China
| | - Liqin Xiong
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
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2
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Zhu B, Liang SH, Ran C. Imaging Brown Adipose Tissue with TSPO PET Tracers in Preclinical Animal Studies. Methods Mol Biol 2023; 2662:147-156. [PMID: 37076678 DOI: 10.1007/978-1-0716-3167-6_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Brown adipose tissue (BAT) is closely associated with thermogenesis and related to numerous diseases, including type 2 diabetes, nonalcoholic fatty liver disease (NAFLD), and obesity. Using molecular imaging technologies to monitor BAT could facilitate etiology elucidation, disease diagnosis, and therapeutics development. Translocator protein (TSPO), an 18 kDa protein that mainly locates on the outer mitochondrial membrane, has been proven as a promising biomarker for monitoring BAT mass. Here, we lay out the steps for imaging BAT with TSPO PET tracer [18F]-DPA in mouse studies.
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Affiliation(s)
- Biyue Zhu
- Molecular Imaging Laboratory, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, MA, USA
| | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Chongzhao Ran
- Molecular Imaging Laboratory, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, MA, USA.
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3
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Jo G, Kim EJ, Song J, Hyun H. Molecular Tuning of IR-786 for Improved Brown Adipose Tissue Imaging. Int J Mol Sci 2022; 23:ijms232213756. [PMID: 36430234 PMCID: PMC9699178 DOI: 10.3390/ijms232213756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/03/2022] [Accepted: 11/08/2022] [Indexed: 11/10/2022] Open
Abstract
To overcome the limitations of brown adipose tissue (BAT) imaging with MRI and PET/CT, near-infrared (NIR) fluorescence imaging has been utilized in living animals because it is highly sensitive, noninvasive, nonradioactive, and cost-effective. To date, only a few NIR fluorescent dyes for detecting BAT have been reported based on the structure-inherent targeting strategy. Among them, IR-786, a commercial cyanine dye, was used firstly for quantitative NIR imaging of BAT perfusion in 2003. Owing to the high cytotoxicity, poor water solubility, and strong nonspecific background uptake of IR-786, the chemical structure of IR-786 should be redesigned to be more hydrophilic and less toxic so that it can show more BAT-specific accumulation. Here, we developed a BAT-specific NIR dye, BF800-AM, by incorporating the tyramine linker in the original structure of IR-786. After modifying the physicochemical properties of IR-786, in vivo results showed significant uptake of the newly designed BF800-AM in the BAT with improved signal-to-background ratio. Additional in vivo studies using mouse tumor models revealed that BF800-AM targeting to BAT is independent of tumor tissues, as distinct from IR-786 showing uptake in both tissues. Therefore, BF800-AM can be used for improved noninvasive visualization of BAT mass and activity in living animals.
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Affiliation(s)
- Gayoung Jo
- Department of Biomedical Sciences, Chonnam National University Medical School, Hwasun 58128, Korea
| | - Eun Jeong Kim
- Department of Biomedical Sciences, Chonnam National University Medical School, Hwasun 58128, Korea
| | - Juhyun Song
- Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Korea
- Correspondence: (J.S.); (H.H.); Tel.: +82-61-379-2706 (J.S.); +82-61-379-2652 (H.H.)
| | - Hoon Hyun
- Department of Biomedical Sciences, Chonnam National University Medical School, Hwasun 58128, Korea
- BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Korea
- Correspondence: (J.S.); (H.H.); Tel.: +82-61-379-2706 (J.S.); +82-61-379-2652 (H.H.)
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Yudasaka M, Okamatsu-Ogura Y, Tanaka T, Saeki K, Kataura H. Cold-induced Conversion of Connective Tissue Skeleton in Brown Adipose Tissues. Acta Histochem Cytochem 2021; 54:131-141. [PMID: 34764522 PMCID: PMC8569133 DOI: 10.1267/ahc.21-00030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/28/2021] [Indexed: 01/21/2023] Open
Abstract
Thermogenesis via fatty acid-induced uncoupled mitochondrial respiration is the primary function of brown adipose tissue (BAT). In response to changes in ambient temperatures, the weight and specific gravity of BAT change, depending on the quantity of lipid droplets stored in brown adipocytes (BA). Such conditions should result in the reconstruction of connective tissue skeletons, especially of collagen fiber networks, although the mechanisms have not been clarified. This study showed that, within 4 hr of exposing mice to a cold environment, collagen fibers in the extracellular matrix (ECM) of BAT became discontinuous, twisted, emancipated, and curtailed. Surprisingly, the structure of collagen fibers returned to normal after the mice were kept at room temperature for 19 hr, indicating that the alterations in collagen fiber structures are physiological processes association with adaptation to cold environments. These dynamic changes in connective tissue skeletons were not observed in white adipose tissues, suggesting that they are unique to BAT. Interestingly, the vascular permeability of BAT was also augmented by exposure to cold. Collectively, these findings indicate that dynamic changes in ECM collagen fibers provide high flexibility to BAT, enabling the adjustment of tissue structures and the regulation of vascular permeability, resulting in adaptation to changes in ambient temperatures.
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Affiliation(s)
- Masako Yudasaka
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology
| | - Yuko Okamatsu-Ogura
- Laboratory of Biochemistry, Faculty of Veterinary Medicine, Hokkaido University
| | - Takeshi Tanaka
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology
| | - Kumiko Saeki
- Department of Laboratory Molecular Genetics of Hematology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Hiromichi Kataura
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology
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Yang J, Zhang H, Parhat K, Xu H, Li M, Wang X, Ran C. Molecular Imaging of Brown Adipose Tissue Mass. Int J Mol Sci 2021; 22:ijms22179436. [PMID: 34502347 PMCID: PMC8431742 DOI: 10.3390/ijms22179436] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/26/2021] [Accepted: 08/26/2021] [Indexed: 12/28/2022] Open
Abstract
Brown adipose tissue (BAT), a uniquely thermogenic tissue that plays an important role in metabolism and energy expenditure, has recently become a revived target in the fight against metabolic diseases, such as obesity, diabetes, and non-alcoholic fatty liver disease (NAFLD). Different from white adipose tissue (WAT), the brown adipocytes have distinctive features including multilocular lipid droplets, a large number of mitochondria, and a high expression of uncoupling protein-1 (UCP-1), as well as abundant capillarity. These histologic characteristics provide an opportunity to differentiate BAT from WAT using imaging modalities, such as PET/CT, SPECT/CT, MRI, NIRF and Ultrasound. However, most of the reported imaging methods were BAT activation dependent, and the imaging signals could be affected by many factors, including environmental temperatures and the states of the sympathetic nervous system. Accurate BAT mass detection methods that are independent of temperature and hormone levels have the capacity to track the development and changes of BAT throughout the lifetime of mammals, and such methods could be very useful for the investigation of potential BAT-related therapies. In this review, we focus on molecular imaging modalities that can detect and quantify BAT mass. In addition, their detection mechanism and limitations will be discussed as well.
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Affiliation(s)
- Jing Yang
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
- Correspondence: (J.Y.); (C.R.)
| | - Haili Zhang
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Kadirya Parhat
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Hui Xu
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Mingshuang Li
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Xiangyu Wang
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Chongzhao Ran
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
- Correspondence: (J.Y.); (C.R.)
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Crandall JP, Wahl RL. Perspectives on Brown Adipose Tissue Imaging: Insights from Preclinical and Clinical Observations from the Last and Current Century. J Nucl Med 2021; 62:34S-43S. [PMID: 34230071 DOI: 10.2967/jnumed.120.246991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/22/2020] [Indexed: 11/16/2022] Open
Abstract
Brown adipose tissue (BAT) was first described in the 16th century, but until late last century had mainly been considered a tissue with the function of nonshivering thermogenesis, maintaining body temperature in key organs in newborns who have high body surface areas relative to their weight and thus marked radiative heat loss. BAT was believed to have substantially disappeared by adulthood. Molecular imaging with 18F-FDG PET and PET combined with CT, as well as imaging with 131I-metaiodobenzylguanidine (MIBG) beginning late last century have shown BAT to be present and active well into adulthood. This review highlights key aspects of BAT biology, early empiric observations misidentifying BAT, pitfalls in image interpretation, and methods to intentionally reduce BAT uptake, and outlines multiple imaging methods used to identify BAT in vivo. The therapeutic potential of increasing the amount or activity of BAT for weight loss and improvement of glucose and lipid profiles is highlighted as a major opportunity. Molecular imaging can help dissect the physiology of this complex dynamic tissue and offers the potential for addressing challenges separating "active BAT" from "total BAT." Research in BAT has grown extensively, and 18F-FDG PET is the key imaging procedure against which all other BAT imaging methods must be compared. Given the multiple functions of BAT, it is reasonable to consider it a previously unrecognized endocrine tissue and thus an appropriate topic for review in this supplement to The Journal of Nuclear Medicine.
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Affiliation(s)
- John P Crandall
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Richard L Wahl
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
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An F, Nurili F, Sayman H, Ozer Z, Cakiroglu H, Aras O, Ting R. One-Step, Rapid, 18F- 19F Isotopic Exchange Radiolabeling of Difluoro-dioxaborinins: Substituent Effect on Stability and In Vivo Applications. J Med Chem 2020; 63:12693-12706. [PMID: 32787084 DOI: 10.1021/acs.jmedchem.0c00997] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The β-diketone moiety is commonly present in many anticancer drugs, antibiotics, and natural products. We describe a general method for radiolabeling β-diketone-bearing molecules with fluoride-18. Radiolabeling was carried out via 18F-19F isotopic exchange on nonradioactive difluoro-dioxaborinins, which were generated by minimally modifying the β-diketone as a difluoroborate. Radiochemistry was one-step, rapid (<10 min), and high-yielding (>80%) and proceeded at room temperature to accommodate the half-life of F-18 (t1/2 = 110 min). High molar activities (7.4 Ci/μmol) were achieved with relatively low starting activities (16.4 mCi). It was found that substituents affected both the solvolytic stability and fluorescence properties of difluoro-dioxaborinins. An F-18 radiolabeled difluoro-dioxaborinin probe that was simultaneously fluorescent showed sufficient stability for in vivo positron emission tomography (PET)/fluorescence imaging in mice, rabbits, and patients. These findings will guide the design of probes with specific PET/fluorescence properties; the development of new PET/fluorescence dual-modality reporters; and accurate in vivo tracking of β-diketone molecules.
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Affiliation(s)
- Feifei An
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Health Science Center, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, P. R. China.,Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education of China 710061 Xi'an, China.,Department of Radiology, Weill Cornell Medicine, 413E, 69th Street, New York, New York 10065, United States
| | - Fuad Nurili
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Haluk Sayman
- Department of Nuclear Medicine, Istanbul University, Cerrahpasa Medical Faculty, Fatih, Istanbul 34303, Turkey
| | - Zahide Ozer
- Department of Radiology, Weill Cornell Medicine, 413E, 69th Street, New York, New York 10065, United States
| | - Huseyin Cakiroglu
- Medical and Experimental Research Center, Sakarya University, Medical Faculty, Adapazari, Sakarya 54290, Turkey
| | - Omer Aras
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Richard Ting
- Department of Radiology, Weill Cornell Medicine, 413E, 69th Street, New York, New York 10065, United States
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8
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Lu KY, Primus Dass KT, Tsai SF, Chuang HM, Lin SZ, Liu SP, Harn HJ. Clinical Application Potential of Small Molecules that Induce Brown Adipose Tissue Thermogenesis by Improving Fat Metabolism. Cell Transplant 2020; 29:963689720927394. [PMID: 32854518 PMCID: PMC7563884 DOI: 10.1177/0963689720927394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Mammalian fat comprises white and brown adipose tissue (WAT and BAT, respectively). WAT stores energy, whereas BAT is used for thermogenesis. In recent years, the incidence of obesity and its associated disorders have increased tremendously. Considering the thermogenic capacity and decreased levels of BAT with increasing age, BAT can be used as a suitable therapeutic target for the treatment of obesity and diabetes. In several studies, using positron emission tomography and computed tomography images, adult humans have been shown to have functional BAT in interscapular fat. Results of these basic research studies on BAT have shed light on the new components of transcriptional regulation and the role of hormones in stimulating BAT growth and differentiation. In this review article, we have summarized the thermogenic regulators identified in the past decades by focusing on peroxisome proliferator-activated receptor gamma/uncoupling protein 1 activators, branched-chain amino acids, fatty acids (lipokine), and adenosine monophosphate-activated protein kinase mediators. We have also presented the progress of a few ongoing clinical trials aimed at the treatment of obesity and its associated metabolic disorders. The main purpose of this review was to provide a comprehensive introduction to the latest knowledge of the representative thermogenic regulators for the treatment of obesity. The fat combustion capacity of BAT may have great potential and can be considered as a suitable target for the therapeutic application of drugs from bench-to-bed treatment of obesity and the associated diseases.
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Affiliation(s)
- Kang-Yun Lu
- 505876Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | | | | | | | - Shinn-Zong Lin
- 505876Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Shih-Ping Liu
- Graduate Institute of Basic Medical Science, Taichung, Taiwan
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Li W, Ma J, Jiang Q, Zhang T, Qi Q, Cheng Y. Fast Noninvasive Measurement of Brown Adipose Tissue in Living Mice by Near-Infrared Fluorescence and Photoacoustic Imaging. Anal Chem 2020; 92:3787-3794. [PMID: 32066237 DOI: 10.1021/acs.analchem.9b05162] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Aberrant brown adipose tissue (BAT) metabolism is linked to obesity as well as other metabolic disorders. However, the paucity of imaging tools limits the study of in vivo BAT metabolism in animal models. The current work evaluated a heptamethine dye (CyHF-8) in living mice as a dual-modality BAT-avid molecular probe for two imaging approaches, including near-infrared fluorescence imaging (NIRF) and photoacoustic imaging (PAI). CyHF-8 exhibited favorable spectral properties in the near-infrared window (786/787/805 nm) and accumulated in the subcellular mitochondria of brown adipocytes. After intravenous injection of CyHF-8, NIRF and PAI were both capable of noninvasively detecting interscapular BAT at early time points in living mice. Quantitative analysis of NIRF and PAI images showed that CyHF-8 signals respond to dynamic BAT changes in mice stimulated by norepinephrine (NE) and in diabetic mice induced by streptozotocin (STZ). In summary, dual-modality NIRF/PAI probe CyHF-8 can be used for both NIRF and PAI to noninvasively assess BAT metabolism in living animals.
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Affiliation(s)
- Wanyun Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Jing Ma
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Qian Jiang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ting Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Qingrong Qi
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yan Cheng
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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10
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Ułamek-Kozioł M, Czuczwar SJ, Januszewski S, Pluta R. Substantiation for the Use of Curcumin during the Development of Neurodegeneration after Brain Ischemia. Int J Mol Sci 2020; 21:ijms21020517. [PMID: 31947633 PMCID: PMC7014172 DOI: 10.3390/ijms21020517] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 01/21/2023] Open
Abstract
Currently available pharmacological treatment of post-ischemia-reperfusion brain injury has limited effectiveness. This review provides an assessment of the current state of neurodegeneration treatment due to ischemia-reperfusion brain injury and focuses on the role of curcumin in the diet. The purpose of this review was to provide a comprehensive overview of what was published about the benefits of curcumin influence on post-ischemic brain damage. Some data on the clinical benefits of curcumin treatment of post-ischemic brain in terms of clinical symptoms and adverse reactions have been reviewed. The data in this review contributes to a better understanding of the potential benefits of curcumin in the treatment of neurodegenerative changes after ischemia and informs scientists, clinicians, and patients, as well as their families and caregivers about the possibilities of such treatment. Due to the pleotropic properties of curcumin, including anti-amyloid, anti-tau protein hyperphosphorylation, anti-inflammatory, anti-apoptotic, and neuroprotective action, as well as increasing neuronal lifespan and promoting neurogenesis, curcumin is a promising candidate for the treatment of post-ischemic neurodegeneration with misfolded proteins accumulation. In this way, it may gain interest as a potential therapy to prevent the development of neurodegenerative changes after cerebral ischemia. In addition, it is a safe substance and inexpensive, easily accessible, and can effectively penetrate the blood–brain barrier and neuronal membranes. In conclusion, the evidence available in a review of the literature on the therapeutic potential of curcumin provides helpful insight into the potential clinical utility of curcumin in the treatment of neurological neurodegenerative diseases with misfolded proteins. Therefore, curcumin may be a promising supplementary agent against development of neurodegeneration after brain ischemia in the future. Indeed, there is a rational scientific basis for the use of curcumin for the prophylaxis and treatment of post-ischemic neurodegeneration.
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Affiliation(s)
- Marzena Ułamek-Kozioł
- Laboratory of Ischemic and Neurodegenerative Brain Research, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland; (M.U.-K.)
- First Department of Neurology, Institute of Psychiatry and Neurology, 02-957 Warsaw, Poland
| | | | - Sławomir Januszewski
- Laboratory of Ischemic and Neurodegenerative Brain Research, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland; (M.U.-K.)
| | - Ryszard Pluta
- Laboratory of Ischemic and Neurodegenerative Brain Research, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland; (M.U.-K.)
- Correspondence: ; Tel.: +48-22-6086-540/6086-469
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11
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Pan R, Zhu X, Maretich P, Chen Y. Combating Obesity With Thermogenic Fat: Current Challenges and Advancements. Front Endocrinol (Lausanne) 2020; 11:185. [PMID: 32351446 PMCID: PMC7174745 DOI: 10.3389/fendo.2020.00185] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/16/2020] [Indexed: 12/12/2022] Open
Abstract
Brown fat and beige fat are known as thermogenic fat due to their contribution to non-shivering thermogenesis in mammals following cold stimulation. Beige fat is unique due to its origin and its development in white fat. Subsequently, both brown fat and beige fat have become viable targets to combat obesity. Over the last few decades, most therapeutic strategies have been focused on the canonical pathway of thermogenic fat activation via the β3-adrenergic receptor (AR). Notwithstanding, administering β3-AR agonists often leads to side effects including hypertension and particularly cardiovascular disease. It is thus imperative to search for alternative therapeutic approaches to combat obesity. In this review, we discuss the current challenges in the field with respect to stimulating brown/beige fat thermogenesis. Additionally, we include a summary of other newly discovered pathways, including non-AR signaling- and non-UCP1-dependent mechanisms, which could be potential targets for the treatment of obesity and its related metabolic diseases.
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MESH Headings
- Adipose Tissue, Beige/drug effects
- Adipose Tissue, Beige/metabolism
- Adipose Tissue, Beige/physiology
- Adipose Tissue, Brown/drug effects
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, Brown/physiology
- Adrenergic beta-3 Receptor Agonists/pharmacology
- Adrenergic beta-3 Receptor Agonists/therapeutic use
- Animals
- Anti-Obesity Agents/pharmacology
- Anti-Obesity Agents/therapeutic use
- Humans
- Obesity/metabolism
- Obesity/therapy
- Receptors, Adrenergic, beta-3/metabolism
- Receptors, Adrenergic, beta-3/physiology
- Signal Transduction/drug effects
- Thermogenesis/drug effects
- Thermogenesis/physiology
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Affiliation(s)
- Ruping Pan
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohua Zhu
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pema Maretich
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Yong Chen
- Department of Endocrinology, Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yong Chen
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12
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Dantas RF, Evangelista TCS, Neves BJ, Senger MR, Andrade CH, Ferreira SB, Silva-Junior FP. Dealing with frequent hitters in drug discovery: a multidisciplinary view on the issue of filtering compounds on biological screenings. Expert Opin Drug Discov 2019; 14:1269-1282. [DOI: 10.1080/17460441.2019.1654453] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Rafael Ferreira Dantas
- LaBECFar – Laboratório de Bioquímica Experimental e Computacional de Fármacos, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Tereza Cristina Santos Evangelista
- LaSOPB – Laboratório de Síntese Orgânica e Prospecção Biológica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bruno Junior Neves
- LabChem – Laboratory of Cheminformatics, Centro Universitário de Anápolis, UniEVANGÉLICA, Anápolis, Brazil
| | - Mario Roberto Senger
- LaBECFar – Laboratório de Bioquímica Experimental e Computacional de Fármacos, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Carolina Horta Andrade
- LabMol – Laboratory for Molecular Modeling and Drug Design, Faculdade de Farmácia, Universidade Federal de Goiás, Goiânia, Brazil
| | - Sabrina Baptista Ferreira
- LaSOPB – Laboratório de Síntese Orgânica e Prospecção Biológica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Floriano Paes Silva-Junior
- LaBECFar – Laboratório de Bioquímica Experimental e Computacional de Fármacos, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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13
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Yu M, Xu J, Zheng J. Renal Clearable Luminescent Gold Nanoparticles: From the Bench to the Clinic. Angew Chem Int Ed Engl 2019; 58:4112-4128. [PMID: 30182529 PMCID: PMC6943938 DOI: 10.1002/anie.201807847] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Indexed: 12/14/2022]
Abstract
With more and more engineered nanoparticles (NPs) being translated to the clinic, the United States Food and Drug Administration (FDA) has recently issued the latest draft guidance on nanomaterial-containing drug products with an emphasis on understanding their in vivo transport and nano-bio interactions. Following these guidelines, NPs can be designed to target and treat diseases more efficiently than small molecules, have minimum accumulation in normal tissues, and induce minimum toxicity. In this Minireview, we integrate this guidance with our ten-year studies on developing renal clearable luminescent gold NPs. These gold NPs resist serum protein adsorption, escape liver uptake, target cancerous tissues, and report kidney dysfunction at early stages. At the same time, off-target gold NPs can be eliminated by the kidneys with minimum accumulation in the body. Additionally, we identify challenges to the translation of renal clearable gold NPs from the bench to the clinic.
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Affiliation(s)
- Mengxiao Yu
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
- ClearNano, Inc., Venture Development Center, The University of Texas at Dallas, 17217 Waterview Parkway, Suite 1.202, Dallas, TX 75252 (USA)
| | - Jing Xu
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
| | - Jie Zheng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
- ClearNano, Inc., Venture Development Center, The University of Texas at Dallas, 17217 Waterview Parkway, Suite 1.202, Dallas, TX 75252 (USA)
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14
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Yu M, Xu J, Zheng J. Renal Clearable Luminescent Gold Nanoparticles: From the Bench to the Clinic. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201807847] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Mengxiao Yu
- Department of Chemistry and BiochemistryThe University of Texas at Dallas 800 W. Campbell Rd. Richardson TX 75080 USA
- ClearNano, Inc., Venture Development CenterThe University of Texas at Dallas 17217 Waterview Parkway, Suite 1.202 Dallas TX 75252 USA
| | - Jing Xu
- Department of Chemistry and BiochemistryThe University of Texas at Dallas 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Jie Zheng
- Department of Chemistry and BiochemistryThe University of Texas at Dallas 800 W. Campbell Rd. Richardson TX 75080 USA
- ClearNano, Inc., Venture Development CenterThe University of Texas at Dallas 17217 Waterview Parkway, Suite 1.202 Dallas TX 75252 USA
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15
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Zhang Y, Hu X, Hu S, Scotti A, Cai K, Wang J, Zhou X, Yang D, Figini M, Pan L, Shangguan J, Yang J, Zhang Z. Non-invasive Imaging Methods for Brown Adipose Tissue Detection and Function Evaluation. ACTA ACUST UNITED AC 2019; 8. [PMID: 31080698 PMCID: PMC6508884 DOI: 10.4172/2165-8048.1000299] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Brown Adipose Tissue (BAT) has a major role in thermoregulation, producing heat by non-shivering thermogenesis. Primarily found in animals and human infants, the presence of significant brown adipose tissue was identified only recently, and its metabolic role in adults was reconsidered. BAT is believed to have an important role in many metabolic diseases, such as obesity and diabetes, and also to be associated with cancer cachexia. Therefore, it is currently a topic of great interest in the research community, and many groups are investigating the mechanisms underlying BAT metabolism in normal and pathological conditions. However, well established non-invasive methods for assessing BAT distribution and function are still lacking. The purpose of this review is to summarize the current state of the art of these methods, with a particular focus on PET, CT and MRI.
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Affiliation(s)
- Yaqi Zhang
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Xiaofei Hu
- Department of Radiology, Third Military Medical University Southwest Hospital, Chongqing, China
| | - Su Hu
- Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Alessandro Scotti
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.,Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Kejia Cai
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.,Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Jian Wang
- Department of Radiology, Third Military Medical University Southwest Hospital, Chongqing, China
| | - Xin Zhou
- Department of Cardiology, Pingjin Hospital, Tianjin, China
| | - Ding Yang
- Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Matteo Figini
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Liang Pan
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Department of Radiology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Junjie Shangguan
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Jia Yang
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Zhuoli Zhang
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
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16
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Abstract
PURPOSE Brown adipose tissue (BAT) in adult humans has been recently rediscovered and intensively investigated as a new potential therapeutic target for obesity and type 2 diabetes (T2D). However, reliable assessment of BAT mass in vivo represents a considerable challenge. The purpose of this investigation is to demonstrate for the first time that human BAT depots can be imaged with a translocator protein (TSPO)-specific positron emission tomography (PET) tracer [11C]PBR28 under thermoneutral conditions. PROCEDURES In this retrospective analysis, we analyzed the images of three healthy volunteers who underwent PET/magnetic resonance (MR) imaging after injection of 14 m Ci of [11C]PBR28 at room temperature. Thirty-minute static PET images were reconstructed from the data obtained 60-90 min after the injection of the tracer. RESULTS [11C]PBR28 uptake in the neck/supraclavicular regions was identified, which was parallel to the known distribution pattern of human BAT depots. These areas co-localized with the areas of hyperintensity and corresponded to fat on T1-weighted MR images. Standardized uptake value (SUV) was used to quantify [11C]PBR28 signal in BAT depots. The average (± SD) SUV(mean) and SUVmax for BAT depots was 2.13 (± 0.33) and 3.19 (± 0.34), respectively, while the average SUV(mean) for muscle and subcutaneous adipose tissue was 0.79 (± 0.1) and 0.18 (± 0.04), respectively. CONCLUSIONS In this brief article, we provide the first evidence suggesting that [11C]PBR28, a widely available TSPO-specific PET tracer, can be used for imaging human BAT mass under thermoneutral conditions.
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17
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Guo Y, Li Y, Yang Y, Tang S, Zhang Y, Xiong L. Multiscale Imaging of Brown Adipose Tissue in Living Mice/Rats with Fluorescent Polymer Dots. ACS APPLIED MATERIALS & INTERFACES 2018; 10:20884-20896. [PMID: 29893119 DOI: 10.1021/acsami.8b06094] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Brown adipose tissue (BAT) has been identified as a promising target for the treatment of obesity, diabetes, and relevant metabolism disorders because of the adaptive thermogenesis ability of this tissue. Visualizing BAT may provide an essential tool for pathology study, drug screening, and efficacy evaluation. Owing to limitations of current nuclear and magnetic resonance imaging approaches for BAT detection, fluorescence imaging has advantages in large-scale preclinical research on small animals. Here, fast BAT imaging in mice is conducted based on polymer dots as fluorescent probes. As early as 5 min after the intravenous injection of polymer dots, extensive fluorescence is detected in the interscapular BAT and axillar BAT. In addition, axillar and inguinal white adipose tissues (WAT) are recognized. The real-time in vivo behavior of polymer dots in rodents is monitored using the probe-based confocal laser endomicroscopy imaging, and the preferred accumulation in BAT over WAT is confirmed by histological assays. Moreover, the whole study is conducted without a low temperature or pharmaceutical stimulation. The imaging efficacy is verified at the cellular, histological, and whole-body levels, and the present results indicate that fluorescent polymer dots may be a promising tool for the visualization of BAT in living subjects.
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Affiliation(s)
- Yixiao Guo
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering , Shanghai Jiao Tong University , Shanghai 200030 , P. R. China
| | - Yao Li
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering , Shanghai Jiao Tong University , Shanghai 200030 , P. R. China
| | - Yidian Yang
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering , Shanghai Jiao Tong University , Shanghai 200030 , P. R. China
- The Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors , Shanghai Normal University , Shanghai 200234 , P. R. China
| | - Shiyi Tang
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering , Shanghai Jiao Tong University , Shanghai 200030 , P. R. China
| | - Yufan Zhang
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering , Shanghai Jiao Tong University , Shanghai 200030 , P. R. China
| | - Liqin Xiong
- Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering , Shanghai Jiao Tong University , Shanghai 200030 , P. R. China
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18
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Chan XHD, Balasundaram G, Attia ABE, Goggi JL, Ramasamy B, Han W, Olivo M, Sugii S. Multimodal imaging approach to monitor browning of adipose tissue in vivo. J Lipid Res 2018; 59:1071-1078. [PMID: 29654114 PMCID: PMC5983400 DOI: 10.1194/jlr.d083410] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 03/13/2018] [Indexed: 11/20/2022] Open
Abstract
The discovery that white adipocytes can undergo a browning process to become metabolically active beige cells has attracted significant interest in the fight against obesity. However, the study of adipose browning has been impeded by a lack of imaging tools that allow longitudinal and noninvasive monitoring of this process in vivo. Here, we report a preclinical imaging approach to detect development of beige adipocytes during adrenergic stimulation. In this approach, we expressed near-infrared fluorescent protein, iRFP720, driven under an uncoupling protein-1 (Ucp1) promoter in mice by viral transduction, and used multispectral optoacoustic imaging technology with ultrasound tomography (MSOT-US) to assess adipose beiging during adrenergic stimulation. We observed increased photoacoustic signal at 720 nm, coupled with attenuated lipid signals in stimulated animals. As a proof of concept, we validated our approach against hybrid positron emission tomography combined with magnetic resonance (PET/MR) imaging modality, and quantified the extent of adipose browning by MRI-guided segmentation of 2-deoxy-2-18F-fluoro-d-glucose uptake signals. The browning extent detected by MSOT-US and PET/MR are well correlated with Ucp1 induction. Taken together, these systems offer great opportunities for preclinical screening aimed at identifying compounds that promote adipose browning and translation of these discoveries into clinical studies of humans.
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Affiliation(s)
- Xin Hui Derryn Chan
- Fat Metabolism and Stem Cell Group, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Ghayathri Balasundaram
- Laboratory of Bio-Optical Imaging, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Amalina Binte Ebrahim Attia
- Laboratory of Bio-Optical Imaging, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Julian L Goggi
- Isotopic Molecular Imaging Group, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore; Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Boominathan Ramasamy
- Isotopic Molecular Imaging Group, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Weiping Han
- Laboratory of Metabolic Medicine, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Malini Olivo
- Laboratory of Bio-Optical Imaging, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore; School of Physics, National University of Ireland Galway, Galway, Ireland
| | - Shigeki Sugii
- Fat Metabolism and Stem Cell Group, Singapore Bio-imaging Consortium, Agency for Science, Technology, and Research (A*STAR), Singapore; Cardiovascular and Metabolic Disorders Program, Duke-National University of Singapore Medical School, Singapore.
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19
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Maiti P, Dunbar GL. Use of Curcumin, a Natural Polyphenol for Targeting Molecular Pathways in Treating Age-Related Neurodegenerative Diseases. Int J Mol Sci 2018; 19:E1637. [PMID: 29857538 PMCID: PMC6032333 DOI: 10.3390/ijms19061637] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/02/2018] [Accepted: 05/25/2018] [Indexed: 12/27/2022] Open
Abstract
Progressive accumulation of misfolded amyloid proteins in intracellular and extracellular spaces is one of the principal reasons for synaptic damage and impairment of neuronal communication in several neurodegenerative diseases. Effective treatments for these diseases are still lacking but remain the focus of much active investigation. Despite testing several synthesized compounds, small molecules, and drugs over the past few decades, very few of them can inhibit aggregation of amyloid proteins and lessen their neurotoxic effects. Recently, the natural polyphenol curcumin (Cur) has been shown to be a promising anti-amyloid, anti-inflammatory and neuroprotective agent for several neurodegenerative diseases. Because of its pleotropic actions on the central nervous system, including preferential binding to amyloid proteins, Cur is being touted as a promising treatment for age-related brain diseases. Here, we focus on molecular targeting of Cur to reduce amyloid burden, rescue neuronal damage, and restore normal cognitive and sensory motor functions in different animal models of neurodegenerative diseases. We specifically highlight Cur as a potential treatment for Alzheimer's, Parkinson's, Huntington's, and prion diseases. In addition, we discuss the major issues and limitations of using Cur for treating these diseases, along with ways of circumventing those shortcomings. Finally, we provide specific recommendations for optimal dosing with Cur for treating neurological diseases.
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Affiliation(s)
- Panchanan Maiti
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Program in Neuroscience, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Department of Psychology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Field Neurosciences Institute, St. Mary's of Michigan, Saginaw, MI 48604, USA.
- Department of Biology, Saginaw Valley State University, Saginaw, MI 48610, USA.
- Brain Research Laboratory, Saginaw Valley State University, Saginaw, MI 48610, USA.
| | - Gary Leo Dunbar
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Program in Neuroscience, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Department of Psychology, Central Michigan University, Mt. Pleasant, MI 48859, USA.
- Field Neurosciences Institute, St. Mary's of Michigan, Saginaw, MI 48604, USA.
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20
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Li Y, Ji YX, Song LJ, Zhang Y, Li ZC, Yang L, Huang WC. A novel BF2–curcumin-based fluorescent chemosensor for detection of Cu2+ in aqueous solution and living cells. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3416-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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21
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Vasudevan S, Prabhune AA. Photophysical studies on curcumin-sophorolipid nanostructures: applications in quorum quenching and imaging. ROYAL SOCIETY OPEN SCIENCE 2018; 5:170865. [PMID: 29515826 PMCID: PMC5830715 DOI: 10.1098/rsos.170865] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Accepted: 01/04/2018] [Indexed: 05/02/2023]
Abstract
Sophorolipid biosurfactants are biodegradable, less toxic and FDA approved. The purified acidic form of sophorolipid is stimuli-responsive with self-assembling properties and used for solubilizing hydrophobic drugs. This study encapsulated curcumin (CU) with acidic sophorolipid (ASL) micelles and analysed using photophysical studies like UV-visible spectroscopy, photoluminescence (PL) spectroscopy and time-correlated single photon counting (TCSPC). TEM images have revealed ellipsoid micelles of approximately 100 nm size and were confirmed by dynamic light scattering. The bacterial fluorescence uptake studies showed the uptake of formed CUASL nanostructures into both Gram-positive and Gram-negative bacteria. They also showed quorum quenching activity against Pseudomonas aeruginosa. The results have demonstrated this system has potential theranostic applications.
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Affiliation(s)
| | - Asmita A. Prabhune
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi-Bhabha Road, Pune 411008, India
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22
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Yang J, Yang J, Ran C. Spectral Unmixing Imaging for Differentiating Brown Adipose Tissue Mass and Its Activation. CONTRAST MEDIA & MOLECULAR IMAGING 2018; 2018:6134186. [PMID: 29531505 PMCID: PMC5817366 DOI: 10.1155/2018/6134186] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/05/2017] [Accepted: 12/11/2017] [Indexed: 12/12/2022]
Abstract
Recent large-scale clinical analysis indicates that brown adipose tissue (BAT) mass levels inversely correlate with body-mass index (BMI), suggesting that BAT is associated with metabolic disorders such as obesity and diabetes. PET imaging with 18F-FDG is the most commonly used method for visualizing BAT. However, this method is not able to differentiate between BAT mass and BAT activation. This task, in fact, presents a tremendous challenge with no currently existing methods to separate BAT mass and BAT activation. Our previous results indicated that BAT could be successfully imaged in mice with near infrared fluorescent (NIRF) curcumin analogues. However, the results from conventional NIRF imaging could not reflect what portion of the NIRF signal from BAT activation contributed to the signal observed. To solve this problem, we used spectral unmixing to separate/unmix NIRF signal from oil droplets in BAT, which represents its mass and NIRF signal from blood, which represents BAT activation. In this report, results from our proof-of-concept investigation demonstrated that spectral unmixing could be used to separate NIRF signal from BAT mass and BAT activation.
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Affiliation(s)
- Jing Yang
- Molecular Imaging Laboratory, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
- School of Pharmacy, Soochow University, Suzhou 215006, China
| | - Jian Yang
- Molecular Imaging Laboratory, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
- Center for Drug Discovery, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Chongzhao Ran
- Molecular Imaging Laboratory, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
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23
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Cong H, Zhong W, Wang Y, Ikuyama S, Fan B, Gu J. Pycnogenol® Induces Browning of White Adipose Tissue through the PKA Signaling Pathway in Apolipoprotein E-Deficient Mice. J Diabetes Res 2018; 2018:9713259. [PMID: 29577045 PMCID: PMC5822826 DOI: 10.1155/2018/9713259] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 10/02/2017] [Accepted: 10/26/2017] [Indexed: 01/13/2023] Open
Abstract
Beige adipocytes in white adipose tissue (WAT) have received considerable recognition because of their potential protective effect against obesity. Pycnogenol (PYC), extracted from French maritime pine bark, has anti-inflammatory and antioxidant properties and can improve lipid profiles. However, the effect of PYC on obesity has never been explored. In this study, we investigated the effects of PYC on obesity and WAT browning in apolipoprotein E- (ApoE-) deficient mice. The results showed that PYC treatment clearly reversed body weight and the mass of eWAT gain resulting from a high-cholesterol and high-fat diet (HCD), but no difference in food intake. The morphology results showed that the size of the adipocytes in the PYC-treated mice was obviously smaller than that in the HCD-fed mice. Next, we found that PYC upregulated the expression of genes related to lipolysis (ATGL and HSL), while it decreased the mRNA level of PLIN1. PYC significantly increased the expression of UCP1 and other genes related to beige adipogenesis. Additionally, PYC increased the expression of proteins related to the protein kinase A (PKA) signaling pathway. The findings suggested that PYC decreased obesity by promoting lipolysis and WAT browning. Thus, PYC may be a novel therapeutic target for obesity.
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Affiliation(s)
- Huiying Cong
- Department of Endocrinology and Metabolism, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
- The Endocrine Institute and the Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
| | - Wenxia Zhong
- Department of Endocrinology and Metabolism, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
- The Endocrine Institute and the Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
| | - Yiying Wang
- Department of Endocrinology and Metabolism, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
- The Endocrine Institute and the Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
| | - Shoichiro Ikuyama
- Department of Clinical Investigation, Department of Diabetes, Endocrine and Rheumatic Diseases, Oita San-ai Medical Center, 1213 Ichi, Oita 870-1151, Japan
| | - Bin Fan
- Department of Neurology, Shengjing Hospital, China Medical University, No. 39 Huaxiang Road, Shenyang 110022, China
| | - Jianqiu Gu
- Department of Endocrinology and Metabolism, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
- The Endocrine Institute and the Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Hospital of China Medical University, No. 155 Nanjing North Street, Shenyang 110001, China
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24
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Yang J, Yang J, Wang L, Moore A, Liang SH, Ran C. Synthesis-free PET imaging of brown adipose tissue and TSPO via combination of disulfiram and 64CuCl 2. Sci Rep 2017; 7:8298. [PMID: 28811616 PMCID: PMC5557754 DOI: 10.1038/s41598-017-09018-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 07/14/2017] [Indexed: 12/21/2022] Open
Abstract
PET imaging is a widely applicable but a very expensive technology. On-site synthesis is one important contributor to the high cost. In this report, we demonstrated the feasibility of a synthesis-free method for PET imaging of brown adipose tissue (BAT) and translocator protein 18 kDa (TSPO) via a combination of disulfiram, an FDA approved drug for alcoholism, and 64CuCl2 (termed 64Cu-Dis). In this method, a step-wise injection protocol of 64CuCl2 and disulfiram was used to accomplish the purpose of synthesis-free. Specifically, disulfiram, an inactive 64Cu ligand, was first injected to allow it to metabolize into diethyldithiocarbamate (DDC), a strong 64Cu ligand, which can chelate 64CuCl2 from the following injection to form the actual PET tracer in situ. Our blocking studies, western blot, and tissue histological imaging suggested that the observed BAT contrast was due to 64Cu-Dis binding to TSPO, which was further confirmed as a specific biomarker for BAT imaging using [18F]-F-DPA, a TSPO-specific PET tracer. Our studies, for the first time, demonstrated that TSPO could serve as a potential imaging biomarker for BAT. We believe that our strategy could be extended to other targets while significantly reducing the cost of PET imaging.
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Affiliation(s)
- Jing Yang
- Molecular Imaging Laboratory, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, MA, 01890, USA.,College of Pharmaceutical Sciences, Soochow University, Suzhou, 215006, China
| | - Jian Yang
- Molecular Imaging Laboratory, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, MA, 01890, USA.,School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Lu Wang
- Division of Nuclear Medicine and Molecular Imaging & Gordon Center for Medical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, Massachusetts, 02114, USA
| | - Anna Moore
- Molecular Imaging Laboratory, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, MA, 01890, USA
| | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging & Gordon Center for Medical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, Massachusetts, 02114, USA
| | - Chongzhao Ran
- Molecular Imaging Laboratory, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital/Harvard Medical School, Boston, MA, 01890, USA.
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25
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Thyagarajan B, Foster MT. Beiging of white adipose tissue as a therapeutic strategy for weight loss in humans. Horm Mol Biol Clin Investig 2017; 31:/j/hmbci.ahead-of-print/hmbci-2017-0016/hmbci-2017-0016.xml. [PMID: 28672737 DOI: 10.1515/hmbci-2017-0016] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 04/18/2017] [Indexed: 12/16/2022]
Abstract
An imbalance between energy intake and expenditure leads to obesity. Adiposity associated with obesity progressively causes inflammation, type 2 diabetes, hypertension, hyperlipidemia and cardiovascular disease. Excessive dietary intake of fat results in its accumulation and storage in the white adipose tissue (WAT), whereas energy expenditure by fat utilization and oxidation predominately occurs in the brown adipose tissue (BAT). Recently, the presence of a third type of fat, referred to as beige or brite (brown in white), has been recognized in certain kinds of WAT depots. It has been suggested that WAT can undergo the process of browning in response to stimuli that induce and enhance the expression of thermogenes characteristic of those typically associated with brown fat. The resultant beige or brite cells enhance energy expenditure by reducing lipids stored within adipose tissue. This has created significant excitement towards the development of a promising strategy to induce browning/beiging in WAT to combat the growing epidemic of obesity. This review systematically describes differential locations and functions of WAT and BAT, mechanisms of beiging of WAT and a concise analysis of drug molecules and natural products that activate the browning phenomenon in vitro and in vivo. This review also discusses potential approaches for targeting WAT with compounds for site-specific beiging induction. Overall, there are numerous mechanisms that govern browning of WAT. There are a variety of newly identified targets whereby potential molecules can promote beiging of WAT and thereby combat obesity.
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Near-Infrared Photoluminescent Carbon Nanotubes for Imaging of Brown Fat. Sci Rep 2017; 7:44760. [PMID: 28317858 PMCID: PMC5357894 DOI: 10.1038/srep44760] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/13/2017] [Indexed: 12/17/2022] Open
Abstract
Near-infrared photoluminescent single-walled carbon nanotubes (CNTs) are expected to provide effectual bio-imaging tools, although, as yet, only limited applications have been reported. Here, we report that CNTs coated with an amphiphilic and biocompatible polymer, poly(2-methacryloyloxyethyl phosphorylcholine-co-n-butyl methacrylate; PMB), generate high-quality images of brown fat. Brown fat is a heat-productive adipose tissue, which is attracting increasing attention as a new therapeutic target for obesity-associated metabolic disorders. Its brown colour is mainly attributed to densely packed capillaries, which facilitate its high heat-exchanging efficiency. Currently, positron emission tomography-computed tomography is the only practical technique to identify brown fat distribution in the living body; however, it is expensive to use. By virtue of their high affinity to apolipoproteins and exemption from macrophage phagocytosis, PMB-CNTs selectively accumulate on capillary endothelial cells but not larger vessels in adipose tissue. Therefore, the image brightness of adipose tissue can directly reflect the capillary density, and indirectly the thermogenic capability and brownness. PMB-CNTs provide clearer images than conventional organic dyes, as the high level of transmitted light passes through the body with less light scattering. Thus, PMB-CNT-based imaging methods could open a new phase in thermogenic adipose tissue research.
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Huang J, Weinfurter S, Daniele C, Perciaccante R, Federica R, Della Ciana L, Pill J, Gretz N. Zwitterionic near infrared fluorescent agents for noninvasive real-time transcutaneous assessment of kidney function. Chem Sci 2017; 8:2652-2660. [PMID: 28553500 PMCID: PMC5431684 DOI: 10.1039/c6sc05059j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 01/08/2017] [Indexed: 12/28/2022] Open
Abstract
Zwitterionic near infrared fluorescent agents were developed for non-invasive real-time transcutaneous assessment of kidney function.
We developed novel zwitterionic near infrared (NIR) fluorescent agents (ABZWCY-HPβCD and AAZWCY-HPβCD), which exhibit favorable hydrophilicity, low plasma protein binding, high stability and non-toxicity. These attractive characteristics ensure that they are excreted rapidly, without any skin accumulation or metabolism in vivo. More importantly, zwitterionic HPβCD based agents can be efficiently filtrated by the glomerulus and completely excreted through the kidneys into urine without reabsorption or secretion in the kidney proximal tubule. Relying on these novel zwitterionic NIR agents and a transcutaneous device, we demonstrate a rapid, robust and biocompatible approach for assessing kidney function in rat models of both healthy rats and those with kidney disease, without the need for time-consuming blood/urine sample preparation. Our work provides a promising tool for in vivo real-time non-invasive kidney function assessment in preclinical applications.
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Affiliation(s)
- Jiaguo Huang
- Medical Research Center , Medical Faculty Mannheim , University of Heidelberg , Theodor-Kutzer-Ufer 1-3 , 68167 , Mannheim , Germany .
| | - Stefanie Weinfurter
- Medical Research Center , Medical Faculty Mannheim , University of Heidelberg , Theodor-Kutzer-Ufer 1-3 , 68167 , Mannheim , Germany .
| | - Cristina Daniele
- Medical Research Center , Medical Faculty Mannheim , University of Heidelberg , Theodor-Kutzer-Ufer 1-3 , 68167 , Mannheim , Germany .
| | | | - Rodeghiero Federica
- Cyanagen S.r.l. , Via degli Stradelli Guelfi 40/C , 40138 Bologna , BO , Italy
| | | | - Johannes Pill
- Medical Research Center , Medical Faculty Mannheim , University of Heidelberg , Theodor-Kutzer-Ufer 1-3 , 68167 , Mannheim , Germany .
| | - Norbert Gretz
- Medical Research Center , Medical Faculty Mannheim , University of Heidelberg , Theodor-Kutzer-Ufer 1-3 , 68167 , Mannheim , Germany .
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Gong L, Wang Y, Liu J. Bioapplications of renal-clearable luminescent metal nanoparticles. Biomater Sci 2017; 5:1393-1406. [DOI: 10.1039/c7bm00257b] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This review summarizes the recent synthetic strategies of the renal-clearable luminescent metal nanoparticles, and discusses the biological behaviors and current disease-related applications of this type of biomaterials in tumor targeting, kidney disease and antimicrobial investigations.
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Affiliation(s)
- Lingshan Gong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Yaping Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Jinbin Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
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A comparative study of dietary curcumin, nanocurcumin, and other classical amyloid-binding dyes for labeling and imaging of amyloid plaques in brain tissue of 5×-familial Alzheimer's disease mice. Histochem Cell Biol 2016; 146:609-625. [PMID: 27406082 DOI: 10.1007/s00418-016-1464-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/24/2016] [Indexed: 12/21/2022]
Abstract
Deposition of amyloid beta protein (Aβ) is a key component in the pathogenesis of Alzheimer's disease (AD). As an anti-amyloid natural polyphenol, curcumin (Cur) has been used as a therapy for AD. Its fluorescent activity, preferential binding to Aβ, as well as structural similarities with other traditional amyloid-binding dyes, make it a promising candidate for labeling and imaging of Aβ plaques in vivo. The present study was designed to test whether dietary Cur and nanocurcumin (NC) provide more sensitivity for labeling and imaging of Aβ plaques in brain tissues from the 5×-familial AD (5×FAD) mice than the classical Aβ-binding dyes, such as Congo red and Thioflavin-S. These comparisons were made in postmortem brain tissues from the 5×FAD mice. We observed that Cur and NC labeled Aβ plaques to the same degree as Aβ-specific antibody and to a greater extent than those of the classical amyloid-binding dyes. Cur and NC also labeled Aβ plaques in 5×FAD brain tissues when injected intraperitoneally. Nanomolar concentrations of Cur or NC are sufficient for labeling and imaging of Aβ plaques in 5×FAD brain tissue. Cur and NC also labeled different types of Aβ plaques, including core, neuritic, diffuse, and burned-out, to a greater degree than other amyloid-binding dyes. Therefore, Cur and or NC can be used as an alternative to Aβ-specific antibody for labeling and imaging of Aβ plaques ex vivo and in vivo. It can provide an easy and inexpensive means of detecting Aβ-plaque load in postmortem brain tissue of animal models of AD after anti-amyloid therapy.
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Wang Z, Gui C, Zhao E, Wang J, Li X, Qin A, Zhao Z, Yu Z, Tang BZ. Specific Fluorescence Probes for Lipid Droplets Based on Simple AIEgens. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10193-200. [PMID: 27053008 DOI: 10.1021/acsami.6b01282] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Lipid droplets (LDs), as dynamic complex organelles, are involved in various physiological processes, and their numbers and activity are related to many diseases, even cancer. Hence, locating and concentration monitoring of LDs are very important to scientific bioresearch and health care. In this work, we prepared two simple luminogens (FAS and DPAS) via very facile synthetic procedures and purification. They feature aggregation-induced emission and excited state intramolecular proton transfer characteristics. They exhibit large Stokes shifts and bright orange and yellow emissions in the aggregated state, and the emissions can be reversibly turned "off" and "on" for many cycles by controlling buffer pH values. Both FAS and DPAS are cytocompatible and can selectively accumulate in and light up the LDs in living cells with superior resolution and high contrast. They also outperform the commercial LD probes in terms of photostability. Combining the advantages of high LD-specificity, good biocompatibility, surperb photostability, and low preparation cost, FAS and DPAS may become powerful tools to the study on LDs-related intracellular activities, such as LDs-based pathology and pharmacology.
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Affiliation(s)
- Zhiming Wang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
- School of Petrochemical Engineering, Shenyang University of Technology , Liaoyang 111003, China
| | - Chen Gui
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
- Department of Chemistry, The Hong Kong University of Science & Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Engui Zhao
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
- Department of Chemistry, The Hong Kong University of Science & Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Jing Wang
- School of Petrochemical Engineering, Shenyang University of Technology , Liaoyang 111003, China
| | - Xiaodong Li
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Anjun Qin
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Zhenqiang Yu
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
- Department of Chemistry, The Hong Kong University of Science & Technology , Clear Water Bay, Kowloon, Hong Kong, China
- Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction , Hong Kong, China
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Yu M, Liu J, Ning X, Zheng J. High-contrast Noninvasive Imaging of Kidney Clearance Kinetics Enabled by Renal Clearable Nanofluorophores. Angew Chem Int Ed Engl 2015; 54:15434-8. [PMID: 26510715 PMCID: PMC4715620 DOI: 10.1002/anie.201507868] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 10/13/2015] [Indexed: 01/21/2023]
Abstract
Noninvasive imaging of kidney clearance kinetics (KCK) of renal clearable probes is key to studying unilateral kidney function diseases, but such imaging is highly challenging to achieve with in vivo fluorescence. While this long-standing challenge is often attributed to the limited light penetration depth, we found that rapid and persistent accumulation of conventional dyes in the skin "shadowed" real fluorescence signals from the kidneys and prevented noninvasive imaging of KCK, which, however, can be addressed with renal clearable nanofluorophores. By integrating near infrared emission with efficient renal clearance and ultralow background interference, the nanofluorophores can increase kidney-contrast enhancement and imaging-time window by approximately 50- and 1000-fold over conventional dyes, and significantly minimize deviation between noninvasive and invasive KCK, laying down a foundation for translating in vivo fluorescence imaging in preclinical noninvasive kidney function assessments.
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Affiliation(s)
- Mengxiao Yu
- Department of Chemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
| | - Jinbin Liu
- Department of Chemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
| | - Xuhui Ning
- Department of Chemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
| | - Jie Zheng
- Department of Chemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA).
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Yu M, Liu J, Ning X, Zheng J. High-contrast Noninvasive Imaging of Kidney Clearance Kinetics Enabled by Renal Clearable Nanofluorophores. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507868] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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