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Shaha S, Rodrigues D, Mitragotri S. Locoregional drug delivery for cancer therapy: Preclinical progress and clinical translation. J Control Release 2024; 367:737-767. [PMID: 38325716 DOI: 10.1016/j.jconrel.2024.01.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/26/2024] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
Systemic drug delivery is the current clinically preferred route for cancer therapy. However, challenges associated with tumor localization and off-tumor toxic effects limit the clinical effectiveness of this route. Locoregional drug delivery is an emerging viable alternative to systemic therapies. With the improvement in real-time imaging technologies and tools for direct access to tumor lesions, the clinical applicability of locoregional drug delivery is becoming more prominent. Theoretically, locoregional treatments can bypass challenges faced by systemic drug delivery. Preclinically, locoregional delivery of drugs has demonstrated enhanced therapeutic efficacy with limited off-target effects while still yielding an abscopal effect. Clinically, an array of locoregional strategies is under investigation for the delivery of drugs ranging in target and size. Locoregional tumor treatment strategies can be classified into two main categories: 1) direct drug infusion via injection or implanted port and 2) extended drug elution via injected or implanted depot. The number of studies investigating locoregional drug delivery strategies for cancer treatment is rising exponentially, in both preclinical and clinical settings, with some approaches approved for clinical use. Here, we highlight key preclinical advances and the clinical relevance of such locoregional delivery strategies in the treatment of cancer. Furthermore, we critically analyze 949 clinical trials involving locoregional drug delivery and discuss emerging trends.
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Affiliation(s)
- Suyog Shaha
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Allston, MA 02134, USA; Wyss Institute for Biologically Inspired Engineering, Boston, MA 02115, USA
| | - Danika Rodrigues
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Allston, MA 02134, USA; Wyss Institute for Biologically Inspired Engineering, Boston, MA 02115, USA
| | - Samir Mitragotri
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Allston, MA 02134, USA; Wyss Institute for Biologically Inspired Engineering, Boston, MA 02115, USA.
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2
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Mythri RB, Aishwarya MRB. Biopolymers as promising vehicles for drug delivery to the brain. Drug Metab Rev 2024; 56:46-61. [PMID: 37955126 DOI: 10.1080/03602532.2023.2281855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
The brain is a privileged organ, tightly guarded by a network of endothelial cells, pericytes, and glial cells called the blood brain barrier. This barrier facilitates tight regulation of the transport of molecules, ions, and cells from the blood to the brain. While this feature ensures protection to the brain, it also presents a challenge for drug delivery for brain diseases. It is, therefore, crucial to identify molecules and/or vehicles that carry drugs, cross the blood brain barrier, and reach targets within the central nervous system. Biopolymers are large polymeric molecules obtained from biological sources. In comparison with synthetic polymers, biopolymers are structurally more complex and their 3D architecture makes them biologically active. Researchers are therefore investigating biopolymers as safe and efficient carriers of brain-targeted therapeutic agents. In this article, we bring together various approaches toward achieving this objective with a note on the prospects for biopolymer-based neurotherapeutic/neurorestorative/neuroprotective interventions. Finally, as a representative paradigm, we discuss the potential use of nanocarrier biopolymers in targeting protein aggregation diseases.
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Affiliation(s)
- Rajeswara Babu Mythri
- Department of Psychology, Christ (Deemed to be University), Dharmaram College Post, Bengaluru, Karnataka, India
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3
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Markowicz-Piasecka M, Markiewicz A, Darłak P, Sikora J, Adla SK, Bagina S, Huttunen KM. Current Chemical, Biological, and Physiological Views in the Development of Successful Brain-Targeted Pharmaceutics. Neurotherapeutics 2022; 19:942-976. [PMID: 35391662 PMCID: PMC9294128 DOI: 10.1007/s13311-022-01228-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2022] [Indexed: 12/13/2022] Open
Abstract
One of the greatest challenges with successful pharmaceutical treatments of central nervous system (CNS) diseases is the delivery of drugs into their target sites with appropriate concentrations. For example, the physically tight blood-brain barrier (BBB) effectively blocks compounds from penetrating into the brain, also by the action of metabolizing enzymes and efflux transport mechanisms. However, many endogenous compounds, including both smaller compounds and macromolecules, like amino acids, sugars, vitamins, nucleosides, hormones, steroids, and electrolytes, have their peculiar internalization routes across the BBB. These delivery mechanisms, namely carrier-mediated transport and receptor-mediated transcytosis have been utilized to some extent in brain-targeted drug development. The incomplete knowledge of the BBB and the smaller than a desirable number of chemical tools have hindered the development of successful brain-targeted pharmaceutics. This review discusses the recent advancements achieved in the field from the point of medicinal chemistry view and discusses how brain drug delivery can be improved in the future.
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Affiliation(s)
- Magdalena Markowicz-Piasecka
- Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego1, 90-151 Lodz, Poland
| | - Agata Markiewicz
- Students Research Group, Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego 1, 90-151 Lodz, Poland
| | - Patrycja Darłak
- Students Research Group, Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego 1, 90-151 Lodz, Poland
| | - Joanna Sikora
- Department of Bioinorganic Chemistry, Medical University of Lodz, Medical University of Lodz, ul. Muszyńskiego1, 90-151 Lodz, Poland
| | - Santosh Kumar Adla
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Yliopistonranta 1C, POB 1627, 70211 Kuopio, Finland
- Institute of Organic Chemistry and Biochemistry (IOCB), Czech Academy of Sciences, Flemingovo Namesti 542/2, 160 00 Prague, Czech Republic
| | - Sreelatha Bagina
- Charles River Discovery Research Services Finland Oy, Neulaniementie 4, 70210 Kuopio, Finland
| | - Kristiina M. Huttunen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Yliopistonranta 1C, POB 1627, 70211 Kuopio, Finland
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Pottoo FH, Sharma S, Javed MN, Barkat MA, Harshita, Alam MS, Naim MJ, Alam O, Ansari MA, Barreto GE, Ashraf GM. Lipid-based nanoformulations in the treatment of neurological disorders. Drug Metab Rev 2020; 52:185-204. [PMID: 32116044 DOI: 10.1080/03602532.2020.1726942] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Faheem Hyder Pottoo
- Department of Pharmacology, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Shrestha Sharma
- Department of Pharmacy, School of Medical and Allied Sciences, K.R. Mangalam University, Gurgaon, India
| | - Md. Noushad Javed
- Department of Pharmaceutics, School of Pharmaceutical Sciences and Research, Jamia Hamdard University, New Delhi, India
- School of Pharmaceutical Sciences, Apeejay Stya University, Gurugram, India
| | - Md. Abul Barkat
- Department of Pharmacy, School of Medical and Allied Sciences, K.R. Mangalam University, Gurgaon, India
| | - Harshita
- Department of Pharmacy, School of Medical and Allied Sciences, K.R. Mangalam University, Gurgaon, India
| | - Md. Sabir Alam
- Department of Pharmacy, School of Medical and Allied Sciences, K.R. Mangalam University, Gurgaon, India
| | - Mohd. Javed Naim
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences and Research, Jamia Hamdard University, New Delhi, India
| | - Ozair Alam
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences and Research, Jamia Hamdard University, New Delhi, India
| | - Mohammad Azam Ansari
- Department of Epidemic Disease Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - George E. Barreto
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
- Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Ghulam Md. Ashraf
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
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Tajes M, Ramos-Fernández E, Weng-Jiang X, Bosch-Morató M, Guivernau B, Eraso-Pichot A, Salvador B, Fernàndez-Busquets X, Roquer J, Muñoz FJ. The blood-brain barrier: structure, function and therapeutic approaches to cross it. Mol Membr Biol 2014; 31:152-67. [PMID: 25046533 DOI: 10.3109/09687688.2014.937468] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The blood-brain barrier (BBB) is constituted by a specialized vascular endothelium that interacts directly with astrocytes, neurons and pericytes. It protects the brain from the molecules of the systemic circulation but it has to be overcome for the proper treatment of brain cancer, psychiatric disorders or neurodegenerative diseases, which are dramatically increasing as the population ages. In the present work we have revised the current knowledge on the cellular structure of the BBB and the different procedures utilized currently and those proposed to cross it. Chemical modifications of the drugs, such as increasing their lipophilicity, turn them more prone to be internalized in the brain. Other mechanisms are the use of molecular tools to bind the drugs such as small immunoglobulins, liposomes or nanoparticles that will act as Trojan Horses favoring the drug delivery in brain. This fusion of the classical pharmacology with nanotechnology has opened a wide field to many different approaches with promising results to hypothesize that BBB will not be a major problem for the new generation of neuroactive drugs. The present review provides an overview of all state-of-the-art of the BBB structure and function, as well as of the classic strategies and these appeared in recent years to deliver drugs into the brain for the treatment of Central Nervous System (CNS) diseases.
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Affiliation(s)
- Marta Tajes
- Laboratory of Molecular Physiology and Channelopathies, Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF) , Barcelona, Spain
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Lu CT, Zhao YZ, Wong HL, Cai J, Peng L, Tian XQ. Current approaches to enhance CNS delivery of drugs across the brain barriers. Int J Nanomedicine 2014; 9:2241-57. [PMID: 24872687 PMCID: PMC4026551 DOI: 10.2147/ijn.s61288] [Citation(s) in RCA: 185] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Although many agents have therapeutic potentials for central nervous system (CNS) diseases, few of these agents have been clinically used because of the brain barriers. As the protective barrier of the CNS, the blood–brain barrier and the blood–cerebrospinal fluid barrier maintain the brain microenvironment, neuronal activity, and proper functioning of the CNS. Different strategies for efficient CNS delivery have been studied. This article reviews the current approaches to open or facilitate penetration across these barriers for enhanced drug delivery to the CNS. These approaches are summarized into three broad categories: noninvasive, invasive, and miscellaneous techniques. The progresses made using these approaches are reviewed, and the associated mechanisms and problems are discussed.
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Affiliation(s)
- Cui-Tao Lu
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, Zhejiang Province, People's Republic of China
| | - Ying-Zheng Zhao
- Hainan Medical College, Haikou City, Hainan Province, People's Republic of China ; College of Pharmaceutical Sciences, Wenzhou Medical University, Zhejiang Province, People's Republic of China
| | - Ho Lun Wong
- School of Pharmacy, Temple University, Philadelphia, PA, USA
| | - Jun Cai
- Departments of Pediatrics and Anatomical Sciences and Neurobiology, University of Louisville School of Medicine Louisville, KY, USA
| | - Lei Peng
- Hainan Medical College, Haikou City, Hainan Province, People's Republic of China
| | - Xin-Qiao Tian
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, Zhejiang Province, People's Republic of China
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Iqbal A, Ahmad I, Khalid MH, Nawaz MS, Gan SH, Kamal MA. Nanoneurotoxicity to nanoneuroprotection using biological and computational approaches. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2013; 31:256-284. [PMID: 24024521 DOI: 10.1080/10590501.2013.829706] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanoparticles (NPs) that are ∼100 nm in diameter can potentially cause toxicity in the central nervous system (CNS). Although NPs exhibit positive aspects, these molecules primarily exert negative or harmful effects. Thus, the beneficial and harmful effects should be compared. The prevalence of neurodegenerative diseases, such as Alzheimer disease, Parkinson disease, and some brain tumors, has increased. However, the major cause of these diseases remains unknown. NPs have been considered as one of the major potential causes of these diseases, penetrating the human body via different pathways. This review summarizes various pathways for NP-induced neurotoxicity, suggesting the development of strategies for nanoneuroprotection using in silico and biological methods. Studies of oxidative stress associated with gene expression analyses provide efficient information for understanding neuroinflammation and neurodegeneration associated with NPs. The brain is a sensitive and fragile organ, and evolution has developed mechanisms to protect it from injury; however, this protection also hinders the methods used for therapeutic purposes. Thus, brain and CNS-related diseases that are the cause of disability and disorder are the most difficult to treat. There are many obstacles to drug delivery in the CNS, such as the blood brain barrier and blood tumor barrier. Considering these barriers, we have reviewed the strategies available to map NPs using biological techniques. The surface adsorption energy of NPs is the basic force driving NP gathering, protein corona formation, and many other interactions of NPs within biological systems. These interactions can be described using an approach named the biological surface adsorption index. A quantitative structural activity relationship study helps to understand different protein-protein or protein-ligand interactions. Moreover, equilibrium between cerebrovascular permeability is required when a drug is transferred via the circulatory system for the therapy of neurodegenerative diseases. Various drug delivery approaches, such as chemical drug delivery and carrier-mediated drug delivery, have been established to avoid different barriers inhibiting CNS penetration by therapeutic substances. Developing an improved understanding of drug receptors and the sites of drug action, together with advances in medicinal chemistry, will make it possible to design drugs with greatly enhanced activity and selectivity; this may result in a significant increase in the therapeutic index.
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Affiliation(s)
- Almas Iqbal
- a Department of Biosciences , COMSATS Institute of Information Technology , Chak Shahzad , Islamabad , Pakistan
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8
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Boongird A, Nasongkla N, Hongeng S, Sukdawong N, Sa-Nguanruang W, Larbcharoensub N. Biocompatibility study of glycofurol in rat brains. Exp Biol Med (Maywood) 2011; 236:77-83. [PMID: 21239737 DOI: 10.1258/ebm.2010.010219] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Glycofurol (GF) has been used clinically as a solvent for parenteral drug delivery systems. However, the application and toxicity of GF in the brain have not been reported. This study was carried out to assess the systemic and neurologic reactions of GF in rats upon intracranial injection. Hematological and neuropathological assessments of rats were performed during the acute, subacute and chronic period after the injection. Injection of the GF solution (GF 25 μL + PBS 25 μL) into the brain cortex showed that it did not cause any deaths or clinical neurobehavioral abnormalities. At the same volume as phosphate-buffered saline (PBS) injection, it had mild effects on all hematological data and histopathology of brain tissues. Nevertheless, histomorphologic assessments of the brain tissues treated with PBS 70 μL revealed different tissue responses compared with those of 70 μL GF solution (30 μL + PBS 40 μL) where tissues around the administration site showed elevated polymorphonuclear leukocytes, macrophages and gliosis. These results demonstrated that the GF solution (GF 25 μL + PBS 25 μL) administration was well tolerated and caused minor inflammatory responses of cerebral cortex. This suggests possibilities of GF for drug delivery systems in the brain parenchymal tissues.
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Affiliation(s)
- Atthaporn Boongird
- Department of Surgery, Neurosurgical Unit, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
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9
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Felluga F, Ghelfi F, Pitacco G, Roncaglia F, Valentin E, Venneri CD. Esterase-mediated synthesis of optically active GABA analogues containing a stereogenic all-carbon quaternary carbon atom. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.07.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Patel MM, Goyal BR, Bhadada SV, Bhatt JS, Amin AF. Getting into the brain: approaches to enhance brain drug delivery. CNS Drugs 2009; 23:35-58. [PMID: 19062774 DOI: 10.2165/0023210-200923010-00003] [Citation(s) in RCA: 271] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Being the most delicate organ of the body, the brain is protected against potentially toxic substances by the blood-brain barrier (BBB), which restricts the entry of most pharmaceuticals into the brain. The developmental process for new drugs for the treatment of CNS disorders has not kept pace with progress in molecular neurosciences because most of the new drugs discovered are unable to cross the BBB. The clinical failure of CNS drug delivery may be attributed largely to a lack of appropriate drug delivery systems. Localized and controlled delivery of drugs at their desired site of action is preferred because it reduces toxicity and increases treatment efficiency. The present review provides an insight into some of the recent advances made in the field of brain drug delivery.The various strategies that have been explored to increase drug delivery into the brain include (i) chemical delivery systems, such as lipid-mediated transport, the prodrug approach and the lock-in system; (ii) biological delivery systems, in which pharmaceuticals are re-engineered to cross the BBB via specific endogenous transporters localized within the brain capillary endothelium; (iii) disruption of the BBB, for example by modification of tight junctions, which causes a controlled and transient increase in the permeability of brain capillaries; (iv) the use of molecular Trojan horses, such as peptidomimetic monoclonal antibodies to transport large molecules (e.g. antibodies, recombinant proteins, nonviral gene medicines or RNA interference drugs) across the BBB; and (v) particulate drug carrier systems. Receptor-mediated transport systems exist for certain endogenous peptides, such as insulin and transferrin, enabling these molecules to cross the BBB in vivo.The use of polymers for local drug delivery has greatly expanded the spectrum of drugs available for the treatment of brain diseases, such as malignant tumours and Alzheimer's disease. In addition, various drug delivery systems (e.g. liposomes, microspheres, nanoparticles, nanogels and bionanocapsules) have been used to enhance drug delivery to the brain. Recently, microchips and biodegradable polymers have become important in brain tumour therapy.The intense search for alternative routes of drug delivery (e.g. intranasal drug delivery, convection-enhanced diffusion and intrathecal/intraventricular drug delivery systems) has been driven by the need to overcome the physiological barriers of the brain and to achieve high drug concentrations within the brain. For more than 30 years, considerable efforts have been made to enhance the delivery of therapeutic molecules across the vascular barriers of the CNS. The current challenge is to develop drug delivery strategies that will allow the passage of drug molecules through the BBB in a safe and effective manner.
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Affiliation(s)
- Mayur M Patel
- Institute of Pharmacy, Nirma University of Science and Technology, Ahmedabad, India
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12
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Syntheses of dopa glycosides using glucosidases. Glycoconj J 2008; 26:199-209. [DOI: 10.1007/s10719-008-9176-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 07/14/2008] [Accepted: 07/29/2008] [Indexed: 11/26/2022]
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13
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Felluga F, Pitacco G, Valentin E, Venneri CD. A facile chemoenzymatic approach to chiral non-racemic β-alkyl-γ-amino acids and 2-alkylsuccinic acids. A concise synthesis of (S)-(+)-Pregabalin. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.03.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Dwibhashyam VSNM, Nagappa AN. Strategies for enhanced drug delivery to the central nervous system. Indian J Pharm Sci 2008; 70:145-53. [PMID: 20046703 PMCID: PMC2792490 DOI: 10.4103/0250-474x.41446] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 02/17/2008] [Accepted: 02/23/2008] [Indexed: 11/29/2022] Open
Abstract
Treating central nervous system diseases is very challenging because of the presence of a variety of formidable obstacles that impede drug delivery. Physiological barriers like the blood-brain barrier and blood-cerebrospinal fluid barrier as well as various efflux transporter proteins make the entry of drugs into the central nervous system very difficult. The present review provides a brief account of the blood brain barrier, the P-glycoprotein efflux and various strategies for enhancing drug delivery to the central nervous system.
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Affiliation(s)
- V. S. N. M. Dwibhashyam
- Pharmacy Practice Department, 4th Floor, Shirdi Sai Baba Cancer Hospital, Manipal-576 104, India
| | - A. N. Nagappa
- TherDose Pharma (P) Ltd., Plot No: 30-32, Survey No. 400, Prasanth Nagar, IE, Hyderabad-500 072, India
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15
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García-Alvarez I, Garrido L, Fernández-Mayoralas A. Studies on the Uptake of Glucose Derivatives by Red Blood Cells. ChemMedChem 2007; 2:496-504. [PMID: 17357169 DOI: 10.1002/cmdc.200600282] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Erythrocytes express the same glucose transporter (GLUT-1) as is present in the blood-brain barrier. With the aim of testing the viability of using this transport system to deliver glucosyl drug derivatives to the brain, the uptake of several dopamine-glucose conjugates and a few structurally related analogues by erythrocytes was studied with HPLC and (1)H MAS NMR spectroscopy. The results showed that slight structural changes determine the uptake of glycoconjugates by red blood cells. However, experiments in the presence of glucose transport inhibitors showed that none of the conjugates that efficiently crossed the cell membrane were transported by GLUT-1.
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Affiliation(s)
- Isabel García-Alvarez
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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16
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de Torres C, Fernández-Mayoralas A. Chemoenzymatic polymer-supported liquid phase synthesis of glucose γ-aminobutyric ester. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00223-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Fernández C, Nieto O, Rivas E, Montenegro G, Fontenla JA, Fernández-Mayoralas A. Synthesis and biological studies of glycosyl dopamine derivatives as potential antiparkinsonian agents. Carbohydr Res 2000; 327:353-65. [PMID: 10990020 DOI: 10.1016/s0008-6215(00)00073-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new approach to deliver dopamine into the central nervous system, based on the use of D-glucose as transportable agent, has been studied. Glycosyl dopamine derivatives bearing the sugar moiety linked to either the amino group or the catechol ring of dopamine through amide, ester or glycosidic bonds were synthesised as potential antiparkinsonian agents. Studies on the binding to dopamine D2 receptor, in vitro stability, and locomotive effect in mice of the synthetic glycoconjugates are reported.
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Affiliation(s)
- C Fernández
- Instituto de Química Orgánica General, CSIC, Madrid, Spain
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18
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Capasso A, Biondi A, Palagiano F, Bonina FP, Montenegro L, de Caprariis P, Pistorio E, Sorrentino L. Anticonvulsive activity of a new GABA mimetic drug. Eur Neuropsychopharmacol 1997; 7:57-63. [PMID: 9088886 DOI: 10.1016/s0924-977x(96)00390-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study examines the pharmacological profile of a new GABA mimetic drug, 4-[(2H)-1,3-benzoxazine-2,4(3H)-dione]-butyric acid (BXDBA), using both a behavioral and an anticonvulsive study. The behavior elements considered were locomotor activity, motor coordination, catalepsy, behavior and antinociception. The anticonvulsive study was performed using the convulsive agent bicuculline. BXDBA [10, 20 and 40 mg/kg, intraperitoneally (i.p.)] did not significantly modify animal behavior or the nociceptive threshold of the animals. The anticonvulsive study indicated that BXDBA (10, 20 and 40 mg/kg, i.p.), injected 60 min before bicuculline (10 micrograms/intracerebroventricular (i.c.v.)/mouse) induced a dose-dependent and significant reduction of the convulsive activity of bicuculline whereas it was ineffective if injected immediately before the convulsive agent. Our data indicate that this new GABA mimetic drug possesses good anticonvulsive activity and its ability to block bicuculline-induced convulsions suggests that it could be a GABAA mimetic drug. Furthermore, since BXDBA is able to act after systemic administration, our data suggest that this new GABA mimetic drug crosses the blood-brain barrier.
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Affiliation(s)
- A Capasso
- School of Pharmacy, University of Salerno, Italy
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Abstract
Gliomas are highly resistant to conventional therapeutic measures, requiring the development of novel treatments. Since gliomas are particularly vascular tumors, one approach involves treatments directed at inhibiting angiogenic mechanisms. Although multiple factors contribute to the ultimate vascularization of any tumor, some are especially relevant to gliomas. Early experimental work directed at inhibiting angiogenic pathways has shown promise toward achieving control of tumor growth. This article focuses on the evidence that angiogenesis and related vascular cell responses play important roles in glioma biology, and reviews those biochemical pathways known through experimentation to be involved in the vascular response to gliomas. Finally, contemporary vessel-targeted approaches that have been used to inhibit glioma growth are discussed.
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Affiliation(s)
- C Guerin
- Department of Neurosurgery, National Naval Medical Center, Bethesda, Maryland 20889-5000, USA
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20
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Abramson S, Alexander H, Best S, Bokros J, Brunski JB, Colas A, Cooper SL, Curtis J, Haubold A, Hench LL, Hergenrother RW, Hoffman AS, Hubbell JA, Jansen JA, King MW, Kohn J, Lamba NM, Langer R, Migliaresi C, More RB, Peppas NA, Ratner BD, Visser SA, Recum AV, Weinberg S, Yannas IV. Classes of Materials Used in Medicine. Biomater Sci 1996. [DOI: 10.1016/b978-012582460-6/50005-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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21
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Brem H, Ewend MG, Piantadosi S, Greenhoot J, Burger PC, Sisti M. The safety of interstitial chemotherapy with BCNU-loaded polymer followed by radiation therapy in the treatment of newly diagnosed malignant gliomas: phase I trial. J Neurooncol 1995; 26:111-23. [PMID: 8787853 DOI: 10.1007/bf01060217] [Citation(s) in RCA: 162] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The results of a multi-institutional phase I trial evaluating the safety of surgically implanted biodegradable 1,3-bis(chloro-ethyl)-1-nitrosourea (BCNU) impregnated polymer as the initial therapy for malignant brain tumors are reported. This is the first study of locally delivered BCNU and standard external beam radiation therapy (XRT) given concurrently. Twenty-two patients were treated at three hospitals. The entry criteria were: single unilateral tumor focus larger than 1 cm3; age over 18 years; Karnofsky Performance Score (KPS) of at least 60 h; and an intra-operative diagnosis of malignant glioma. Twenty-one of twenty-two patients had glioblastoma multiforme. After surgery, seven or eight BCNU-loaded polyanhydride polymer discs (7.7 mg BCNU each) were placed in the resection cavity. Postoperatively, all patients received standard radiation therapy; none received additional chemotherapy in the first 6 months. Neurotoxicity, systemic toxicity, and survival were assessed. No perioperative mortality was seen. Neurotoxicity was equivalent to that occurring in other series of patients undergoing craniotomy and XRT without local chemotherapy. Systematically, no significant bone marrow suppression occurred, and there were no wound infections. Median survival in this group of older patients (mean age = 60) was 42 weeks, 8 patients survived 1 year, and 4 patients survived more than 18 months. Interstitial chemotherapy with BCNU-polymer with subsequent radiation therapy appears to be safe as an initial therapy. Several long-term survivors in this group of older patients with predominantly glioblastoma suggests efficacy in some patients. Dose escalation and efficacy trials are planned to further evaluate interstitial chemotherapy for the initial treatment of malignant gliomas.
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Affiliation(s)
- H Brem
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, MD, USA
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Reisfeld B, Kalyanasundaram S, Leong K. A mathematical model of polymeric controlled drug release and transport in the brain. J Control Release 1995. [DOI: 10.1016/0168-3659(94)00133-f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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