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Kociszewska D, Vlajkovic S. Age-Related Hearing Loss: The Link between Inflammaging, Immunosenescence, and Gut Dysbiosis. Int J Mol Sci 2022; 23:7348. [PMID: 35806352 PMCID: PMC9266910 DOI: 10.3390/ijms23137348] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/30/2022] [Accepted: 06/30/2022] [Indexed: 12/12/2022] Open
Abstract
This article provides a theoretical overview of the association between age-related hearing loss (ARHL), immune system ageing (immunosenescence), and chronic inflammation. ARHL, or presbyacusis, is the most common sensory disability that significantly reduces the quality of life and has a high economic impact. This disorder is linked to genetic risk factors but is also influenced by a lifelong cumulative effect of environmental stressors, such as noise, otological diseases, or ototoxic drugs. Age-related hearing loss and other age-related disorders share common mechanisms which often converge on low-grade chronic inflammation known as "inflammaging". Various stimuli can sustain inflammaging, including pathogens, cell debris, nutrients, and gut microbiota. As a result of ageing, the immune system can become defective, leading to the accumulation of unresolved inflammatory processes in the body. Gut microbiota plays a central role in inflammaging because it can release inflammatory mediators and crosstalk with other organ systems. A proinflammatory gut environment associated with ageing could result in a leaky gut and the translocation of bacterial metabolites and inflammatory mediators to distant organs via the systemic circulation. Here, we postulate that inflammaging, as a result of immunosenescence and gut dysbiosis, accelerates age-related cochlear degeneration, contributing to the development of ARHL. Age-dependent gut dysbiosis was included as a hypothetical link that should receive more attention in future studies.
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Affiliation(s)
| | - Srdjan Vlajkovic
- Department of Physiology and The Eisdell Moore Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag, Auckland 1142, New Zealand;
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2
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Zhang Y, Li Y, Wang Q, Zheng D, Feng X, Zhao W, Cai L, Zhang Q, Xu H, Fu H. Attenuation of hepatic ischemia‑reperfusion injury by adipose stem cell‑derived exosome treatment via ERK1/2 and GSK‑3β signaling pathways. Int J Mol Med 2022; 49:13. [PMID: 34878156 PMCID: PMC8711591 DOI: 10.3892/ijmm.2021.5068] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 10/14/2021] [Indexed: 11/23/2022] Open
Abstract
Exosomes are an emerging therapeutic tool for the treatment of tissue injuries. In the present study, the protective effect of isolated exosomes from adipose‑derived stem cells (ADSCs‑exo) against hepatic ischemia‑reperfusion (I/R) injury was explored. Hepatic I/R injury was achieved by inducing ischemia for 60 min followed by reperfusion for 2 and 6 h. Pre‑treatment with ADSCs‑exo revealed a significant reduction in necrosis and apoptosis in liver tissue induced by I/R injury. Hypoxic oxidative stress was managed by exosome‑mediated reduced reactive oxygen species and increased superoxide dismutase that in turn protected mitochondrial damage and apoptosis. Reduction in inflammatory mediators such as IL‑1β and TNF‑α was also observed and protection of hepatocytes from I/R injury was evidenced by a significant decrease in biochemical markers of liver damage (alanine transaminase, aspartate transaminase and lactate dehydrogenase). Exosomal prostaglandin E2 (PGE2)‑mediated ERK1/2 and GSK‑3β phosphorylation were revealed to increase Bcl‑2 and decrease Bax expression with mitochondrial permeability transition pore‑inhibition which may be considered a prime mechanism of exosome‑mediated hepatoprotection. In conclusion, our results indicated that ADSCs‑exo pre‑treatment is effective in protecting liver I/R injury.
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Affiliation(s)
- Yaqing Zhang
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai 200003, P.R. China
| | - Yonghua Li
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai 200003, P.R. China
| | - Qilong Wang
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai 200003, P.R. China
| | - Dongyu Zheng
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai 200003, P.R. China
| | - Xue Feng
- Department of Liver Surgery and Liver Transplantation Center, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
| | - Wei Zhao
- Department of Obstetrics and Gynecology, Inner Mongolia Autonomous Region Corps Hospital of Chinese People's Armed Police Force, Hohhot, Inner Mongolia Autonomous Region 010040, P.R. China
| | - Linlin Cai
- Department of Anesthesiology, Wuxi People's Hospital, Wuxi, Jiangsu 214023, P.R. China
| | - Qingqing Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, P.R. China
| | - Haitao Xu
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai 200003, P.R. China
| | - Hailong Fu
- Department of Anesthesiology, Changzheng Hospital, Naval Medical University, Shanghai 200003, P.R. China
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Espinoza C, Fuenzalida B, Leiva A. Increased Fetal Cardiovascular Disease Risk: Potential Synergy Between Gestational Diabetes Mellitus and Maternal Hypercholesterolemia. Curr Vasc Pharmacol 2021; 19:601-623. [PMID: 33902412 DOI: 10.2174/1570161119666210423085407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/27/2021] [Accepted: 03/16/2021] [Indexed: 01/25/2023]
Abstract
Cardiovascular diseases (CVD) remain a major cause of death worldwide. Evidence suggests that the risk for CVD can increase at the fetal stages due to maternal metabolic diseases, such as gestational diabetes mellitus (GDM) and maternal supraphysiological hypercholesterolemia (MSPH). GDM is a hyperglycemic, inflammatory, and insulin-resistant state that increases plasma levels of free fatty acids and triglycerides, impairs endothelial vascular tone regulation, and due to the increased nutrient transport, exposes the fetus to the altered metabolic conditions of the mother. MSPH involves increased levels of cholesterol (mainly as low-density lipoprotein cholesterol) which also causes endothelial dysfunction and alters nutrient transport to the fetus. Despite that an association has already been established between MSPH and increased CVD risk, however, little is known about the cellular processes underlying this relationship. Our knowledge is further obscured when the simultaneous presentation of MSPH and GDM takes place. In this context, GDM and MSPH may substantially increase fetal CVD risk due to synergistic impairment of placental nutrient transport and endothelial dysfunction. More studies on the separate and/or cumulative role of both processes are warranted to suggest specific treatment options.
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Affiliation(s)
- Cristian Espinoza
- Faculty of Biological Sciences, Pontificia Universidad Catolica de Chile, Santiago 8330024, Chile
| | - Barbara Fuenzalida
- Institute of Biochemistry and Molecular Medicine, University of Bern, CH-3012 Bern, Switzerland
| | - Andrea Leiva
- School of Medical Technology, Health Sciences Faculty, Universidad San Sebastian, Providencia 7510157, Chile
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Utilization of Biased G Protein-Coupled ReceptorSignaling towards Development of Safer andPersonalized Therapeutics. Molecules 2019; 24:molecules24112052. [PMID: 31146474 PMCID: PMC6600667 DOI: 10.3390/molecules24112052] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/19/2019] [Accepted: 05/24/2019] [Indexed: 12/12/2022] Open
Abstract
G protein-coupled receptors (GPCRs) are involved in a wide variety of physiological processes. Therefore, approximately 40% of currently prescribed drugs have targeted this receptor family. Discovery of β-arrestin mediated signaling and also separability of G protein and β-arrestin signaling pathways have switched the research focus in the GPCR field towards development of biased ligands, which provide engagement of the receptor with a certain effector, thus enriching a specific signaling pathway. In this review, we summarize possible factors that impact signaling profiles of GPCRs such as oligomerization, drug treatment, disease conditions, genetic background, etc. along with relevant molecules that can be used to modulate signaling properties of GPCRs such as allosteric or bitopic ligands, ions, aptamers and pepducins. Moreover, we also discuss the importance of inclusion of pharmacogenomics and molecular dynamics simulations to achieve a holistic understanding of the relation between genetic background and structure and function of GPCRs and GPCR-related proteins. Consequently, specific downstream signaling pathways can be enriched while those that bring unwanted side effects can be prevented on a patient-specific basis. This will improve studies that centered on development of safer and personalized therapeutics, thus alleviating the burden on economy and public health.
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Roma MG, Barosso IR, Miszczuk GS, Crocenzi FA, Pozzi EJS. Dynamic Localization of Hepatocellular Transporters: Role in Biliary Excretion and Impairment in Cholestasis. Curr Med Chem 2019; 26:1113-1154. [DOI: 10.2174/0929867325666171205153204] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 12/25/2022]
Abstract
Bile flow generation is driven by the vectorial transfer of osmotically active compounds from sinusoidal blood into a confined space, the bile canaliculus. Hence, localization of hepatocellular transporters relevant to bile formation is crucial for bile secretion. Hepatocellular transporters are localized either in the plasma membrane or in recycling endosomes, from where they can be relocated to the plasma membrane on demand, or endocytosed when the demand decreases. The balance between endocytic internalization/ exocytic targeting to/from this recycling compartment is therefore the main determinant of the hepatic capability to generate bile, and to dispose endo- and xenobiotics. Furthermore, the exacerbated endocytic internalization is a common pathomechanisms in both experimental and human cholestasis; this results in bile secretory failure and, eventually, posttranslational transporter downregulation by increased degradation. This review summarizes the proposed structural mechanisms accounting for this pathological condition (e.g., alteration of function, localization or expression of F-actin or F-actin/transporter cross-linking proteins, and switch to membrane microdomains where they can be readily endocytosed), and the mediators implicated (e.g., triggering of “cholestatic” signaling transduction pathways). Lastly, we discussed the efficacy to counteract the cholestatic failure induced by transporter internalization of a number of therapeutic experimental approaches based upon the use of compounds that trigger exocytic targetting of canalicular transporters (e.g., cAMP, tauroursodeoxycholate). This therapeutics may complement treatments aimed to transcriptionally improve transporter expression, by affording proper localization and membrane stability to the de novo synthesized transporters.
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Affiliation(s)
- Marcelo G. Roma
- Instituto de Fisiologia Experimental (IFISE) - Facultad de Ciencias Bioquimicas y Farmaceuticas (CONICET - U.N.R.), S2002LRL, Rosario, Argentina
| | - Ismael R. Barosso
- Instituto de Fisiologia Experimental (IFISE) - Facultad de Ciencias Bioquimicas y Farmaceuticas (CONICET - U.N.R.), S2002LRL, Rosario, Argentina
| | - Gisel S. Miszczuk
- Instituto de Fisiologia Experimental (IFISE) - Facultad de Ciencias Bioquimicas y Farmaceuticas (CONICET - U.N.R.), S2002LRL, Rosario, Argentina
| | - Fernando A. Crocenzi
- Instituto de Fisiologia Experimental (IFISE) - Facultad de Ciencias Bioquimicas y Farmaceuticas (CONICET - U.N.R.), S2002LRL, Rosario, Argentina
| | - Enrique J. Sánchez Pozzi
- Instituto de Fisiologia Experimental (IFISE) - Facultad de Ciencias Bioquimicas y Farmaceuticas (CONICET - U.N.R.), S2002LRL, Rosario, Argentina
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Marques-Santos LF, Grassi G, Bergami E, Faleri C, Balbi T, Salis A, Damonte G, Canesi L, Corsi I. Cationic polystyrene nanoparticle and the sea urchin immune system: biocorona formation, cell toxicity, and multixenobiotic resistance phenotype. Nanotoxicology 2018; 12:847-867. [DOI: 10.1080/17435390.2018.1482378] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- L. F. Marques-Santos
- Department of Molecular Biology, Federal University of Paraiba, João Pessoa, Brazil
| | - G. Grassi
- Department of Physical, Earth and Environmental Sciences-DSFTA, University of Siena, Siena, Italy
| | - E. Bergami
- Department of Physical, Earth and Environmental Sciences-DSFTA, University of Siena, Siena, Italy
| | - C. Faleri
- Department of Earth, Environmental and Life Sciences-DISTAV, University of Genoa, Genoa, Italy
| | - T. Balbi
- Department of Life Sciences-DSV, University of Siena, Siena, Italy
| | - A. Salis
- Centre of Excellence for Biomedical Research, University of Genoa, Genoa, Italy
| | - G. Damonte
- Centre of Excellence for Biomedical Research, University of Genoa, Genoa, Italy
| | - L. Canesi
- Department of Life Sciences-DSV, University of Siena, Siena, Italy
| | - I. Corsi
- Department of Physical, Earth and Environmental Sciences-DSFTA, University of Siena, Siena, Italy
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7
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Imran M, Sergent O, Tête A, Gallais I, Chevanne M, Lagadic-Gossmann D, Podechard N. Membrane Remodeling as a Key Player of the Hepatotoxicity Induced by Co-Exposure to Benzo[a]pyrene and Ethanol of Obese Zebrafish Larvae. Biomolecules 2018; 8:biom8020026. [PMID: 29757947 PMCID: PMC6023014 DOI: 10.3390/biom8020026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/04/2018] [Accepted: 05/04/2018] [Indexed: 12/11/2022] Open
Abstract
The rise in prevalence of non-alcoholic fatty liver disease (NAFLD) constitutes an important public health concern worldwide. Including obesity, numerous risk factors of NAFLD such as benzo[a]pyrene (B[a]P) and ethanol have been identified as modifying the physicochemical properties of the plasma membrane in vitro thus causing membrane remodeling—changes in membrane fluidity and lipid-raft characteristics. In this study, the possible involvement of membrane remodeling in the in vivo progression of steatosis to a steatohepatitis-like state upon co-exposure to B[a]P and ethanol was tested in obese zebrafish larvae. Larvae bearing steatosis as the result of a high-fat diet were exposed to ethanol and/or B[a]P for seven days at low concentrations coherent with human exposure in order to elicit hepatotoxicity. In this condition, the toxicant co-exposure raised global membrane order with higher lipid-raft clustering in the plasma membrane of liver cells, as evaluated by staining with the fluoroprobe di-4-ANEPPDHQ. Involvement of this membrane’s remodeling was finally explored by using the lipid-raft disruptor pravastatin that counteracted the effects of toxicant co-exposure both on membrane remodeling and toxicity. Overall, it can be concluded that B[a]P/ethanol co-exposure can induce in vivo hepatotoxicity via membrane remodeling which could be considered as a good target mechanism for developing combination therapy to deal with steatohepatitis.
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Affiliation(s)
- Muhammad Imran
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
| | - Odile Sergent
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
| | - Arnaud Tête
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
| | - Isabelle Gallais
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
| | - Martine Chevanne
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
| | - Dominique Lagadic-Gossmann
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
| | - Normand Podechard
- Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, University of Rennes, F-35000 Rennes, France.
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8
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Jideonwo V, Hou Y, Ahn M, Surendran S, Morral N. Impact of silencing hepatic SREBP-1 on insulin signaling. PLoS One 2018; 13:e0196704. [PMID: 29723221 PMCID: PMC5933792 DOI: 10.1371/journal.pone.0196704] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 04/18/2018] [Indexed: 11/18/2022] Open
Abstract
Sterol Regulatory Element Binding Protein-1 (SREBP-1) is a conserved transcription factor of the basic helix-loop-helix leucine zipper family (bHLH-Zip) that plays a central role in regulating expression of genes of carbohydrate and fatty acid metabolism in the liver. SREBP-1 activity is essential for the control of insulin-induced anabolic processes during the fed state. In addition, SREBP-1 regulates expression of key molecules in the insulin signaling pathway, including insulin receptor substrate 2 (IRS2) and a subunit of the phosphatidylinositol 3-kinase (PI3K) complex, PIK3R3, suggesting that feedback mechanisms exist between SREBP-1 and this pathway. Nevertheless, the overall contribution of SREBP-1 activity to maintain insulin signal transduction is unknown. Furthermore, Akt is a known activator of mTORC1, a sensor of energy availability that plays a fundamental role in metabolism, cellular growth and survival. We have silenced SREBP-1 and explored the impact on insulin signaling and mTOR in mice under fed, fasted and refed conditions. No alterations in circulating levels of insulin were observed. The studies revealed that depletion of SREBP-1 had no impact on IRS1Y612, AktS473, and downstream effectors GSK3αS21 and FoxO1S256 during the fed state. Nevertheless, reduced levels of these molecules were observed under fasting conditions. These effects were not associated with changes in phosphorylation of mTOR. Overall, our data indicate that the contribution of SREBP-1 to maintain insulin signal transduction in liver is modest.
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Affiliation(s)
- Victoria Jideonwo
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Yongyong Hou
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Miwon Ahn
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Sneha Surendran
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Núria Morral
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- * E-mail:
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Liu BB, Kong J, Wu SD, Wang Y. Bile acid salt export pump: Molecular mechanisms of transcription and intracellular regulation. Shijie Huaren Xiaohua Zazhi 2014; 22:788-794. [DOI: 10.11569/wcjd.v22.i6.788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Bile salt export pump (BSEP), a member of ATP binding cassette (ABC), is responsible for transporting bile salt and is located on cholangiole lateral membrane. In humans, BSEP defects can lead to different types of cholestatic diseases, including hereditary or acquired liver diseases. In addition, BSEP is the most likely candidate gene for Lith1 stone. The bile salt plays an important role in many physiological and pathophysiological processes, and the scientific community has attached great importance to the research on the regulatory mechanism of the expression of BSEP. This paper summarizes the research related to transcriptional regulation of BSEP, and expression or functional changes of BSEP on cholangiole lateral membrane caused by intracellular transport changes, including intracellular endoplasmic reticulum and cell membrane ubiquitination-protease mediated protein degradation, short-term phosphorylation of BSEP, glycosylation, ubiquitination, and the regulatory effect of cholangiole lateral membrane-associated proteins.
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Tarahovsky YS, Kim YA, Yagolnik EA, Muzafarov EN. Flavonoid-membrane interactions: involvement of flavonoid-metal complexes in raft signaling. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:1235-46. [PMID: 24472512 DOI: 10.1016/j.bbamem.2014.01.021] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 01/13/2014] [Accepted: 01/17/2014] [Indexed: 02/07/2023]
Abstract
Flavonoids are polyphenolic compounds produced by plants and delivered to the human body through food. Although the epidemiological analyses of large human populations did not reveal a simple correlation between flavonoid consumption and health, laboratory investigations and clinical trials clearly demonstrate the effectiveness of flavonoids in the prevention of cardiovascular, carcinogenic, neurodegenerative and immune diseases, as well as other diseases. At present, the abilities of flavonoids in the regulation of cell metabolism, gene expression, and protection against oxidative stress are well-known, although certain biophysical aspects of their functioning are not yet clear. Most flavonoids are poorly soluble in water and, similar to lipophilic compounds, have a tendency to accumulate in biological membranes, particularly in lipid rafts, where they can interact with different receptors and signal transducers and influence their functioning through modulation of the lipid-phase behavior. In this study, we discuss the enhancement in the lipophilicity and antioxidative activity of flavonoids after their complexation with transient metal cations. We hypothesize that flavonoid-metal complexes are involved in the formation of molecular assemblies due to the facilitation of membrane adhesion and fusion, protein-protein and protein-membrane binding, and other processes responsible for the regulation of cell metabolism and protection against environmental hazards.
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Affiliation(s)
- Yury S Tarahovsky
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region 142290, Russia.
| | - Yuri A Kim
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290, Russia
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12
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Balmert SC, Little SR. Biomimetic delivery with micro- and nanoparticles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:3757-78. [PMID: 22528985 PMCID: PMC3627374 DOI: 10.1002/adma.201200224] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Indexed: 05/16/2023]
Abstract
The nascent field of biomimetic delivery with micro- and nanoparticles (MNP) has advanced considerably in recent years. Drawing inspiration from the ways that cells communicate in the body, several different modes of "delivery" (i.e., temporospatial presentation of biological signals) have been investigated in a number of therapeutic contexts. In particular, this review focuses on (1) controlled release formulations that deliver natural soluble factors with physiologically relevant temporal context, (2) presentation of surface-bound ligands to cells, with spatial organization of ligands ranging from isotropic to dynamically anisotropic, and (3) physical properties of particles, including size, shape and mechanical stiffness, which mimic those of natural cells. Importantly, the context provided by multimodal, or multifactor delivery represents a key element of most biomimetic MNP systems, a concept illustrated by an analogy to human interpersonal communication. Regulatory implications of increasingly sophisticated and "cell-like" biomimetic MNP systems are also discussed.
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Affiliation(s)
- Stephen C Balmert
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA 15261 USA
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Kim H, Zhai G, Samuel SL, Rigell CJ, Umphrey HR, Rana S, Stockard CR, Fineberg NS, Zinn KR. Dual combination therapy targeting DR5 and EMMPRIN in pancreatic adenocarcinoma. Mol Cancer Ther 2011; 11:405-15. [PMID: 22203731 DOI: 10.1158/1535-7163.mct-11-0581] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The goal of the study was to assess the efficacy of combined extracellular matrix metalloprotease inducer (EMMPRIN)- and death receptor 5 (DR5)-targeted therapy for pancreatic adenocarcinoma in orthotopic mouse models with multimodal imaging. Cytotoxicity of anti-EMMPRIN antibody and anti-DR5 antibody (TRA-8) in MIA PaCa-2 and PANC-1 cell lines was measured by ATPlite assay in vitro. The distributions of Cy5.5-labeled TRA-8 and Cy3-labeled anti-EMMPRIN antibody in the 2 cell lines were analyzed by fluorescence imaging in vitro. Groups 1 to 12 of severe combined immunodeficient mice bearing orthotopic MIA PaCa-2 (groups 1-8) or PANC-1 (groups 9-12) tumors were used for in vivo studies. Dynamic contrast-enhanced-MRI was applied in group 1 (untreated) or group 2 (anti-EMMPRIN antibody). The tumor uptake of Tc-99m-labeled TRA-8 was measured in group 3 (untreated) and group 4 (anti-EMMPRIN antibody). Positron emission tomography/computed tomography imaging with (18)F-FDG was applied in groups 5 to 12. Groups 5 to 8 (or groups 9 to 12) were untreated or treated with anti-EMMPRIN antibody, TRA-8, and combination, respectively. TRA-8 showed high killing efficacy for both MIA PaCa-2 and PANC-1 cells in vitro, but additional anti-EMMPRIN treatment did not improve the cytotoxicity. Cy5.5-TRA-8 formed cellular caps in both the cell lines, whereas the maximum signal intensity was correlated with TRA-8 cytotoxicity. Anti-EMMPRIN therapy significantly enhanced the tumor delivery of the MR contrast agent, but not Tc-99m-TRA-8. Tumor growth was significantly suppressed by the combination therapy, and the additive effect of the combination was shown in both MIA PaCa-2 and PANC-1 tumor models.
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Affiliation(s)
- Hyunki Kim
- Department of Radiology, University of Alabama at Birmingham, 1670 University Blvd, Birmingham, AL 35294, USA.
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Osna NA. An annual topic highlight: Alcohol and liver, 2011. World J Gastroenterol 2011; 17:2455. [PMID: 21633649 PMCID: PMC3103802 DOI: 10.3748/wjg.v17.i20.2455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Revised: 03/01/2011] [Accepted: 03/08/2011] [Indexed: 02/06/2023] Open
Abstract
An annual topic highlight: Alcohol and Liver, 2011, covers the important and new aspects of pathogenesis of alcoholic liver diseases (ALD). It includes broad topics ranging from the exacerbation of ALD by infectious (viral) agents (hepatitis C virus and human immunodeficiency virus) to the influence of alcohol on liver fibrogenesis, lipid rafts, autophagy and other aspects. This issue is recommended for both basic scientists and clinicians who are involved in alcoholic liver research.
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