Nanopharmaceuticals: Principles and Applications Vol. 3 [1st ed.] 9783030471194, 9783030471200

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Table of contents :
Front Matter ....Pages i-xvi
Inorganic Nanomaterials for Enhanced Therapeutic Safety (Sunaina Indermun, Mershen Govender, Pradeep Kumar, Yahya E. Choonara, Viness Pillay)....Pages 1-24
Nanoparticles Application for Cancer Diagnosis (Mohammad Ramezani, Mona Alibolandi, Fahimeh Charbgoo, Khalil Abnous, Seyed Mohammad Taghdisi)....Pages 25-52
Insights into Nanotools for Dental Interventions (Pooja Jain, Fahima Dilnawaz, Zeenat Iqbal)....Pages 53-79
Nanopharmaceuticals: Synthesis, Characterization, and Challenges (Sunita Ojha, Dharitri Saikia, Utpal Bora)....Pages 81-138
Electrospun Nanofibers as Carriers in Dermal Drug Delivery (Meryem Sedef Erdal, Sevgi Güngör)....Pages 139-163
Enzyme-Responsive and Enzyme Immobilized Nanoplatforms for Therapeutic Delivery: An Overview of Research Innovations and Biomedical Applications (Mohd Faheem Khan, Debasree Kundu, Manashjit Gogoi, Ashwinee Kumar Shrestha, Naikankatte G. Karanth, Sanjukta Patra)....Pages 165-200
Systemic Nanotoxicity and Its Assessment in Animal Models (Vishal Sharma, Bharti Aneja, Vinod Kumar Yata, Dhruba Malakar, Ashok Kumar Mohanty)....Pages 201-243
Dendrimers as Drug Carriers for Cancer Therapy (Narsireddy Amreddy, Anish Babu, Anupama Munshi, Rajagopal Ramesh)....Pages 245-269
Nanoparticle Design to Improve Transport Across the Intestinal Barrier (Wai-Houng Chou, Tessa Lühmann, Lorenz Meinel, Javier Octavio Morales)....Pages 271-315
Recent Progress in Nanotheranostic Medicine (Pravas R Sahoo, H. Madhyastha, R. Madhyastha, M. Maruyama, Y. Nakajima)....Pages 317-334
Back Matter ....Pages 335-340
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Environmental Chemistry for a Sustainable World 48

Vinod Kumar Yata Shivendu Ranjan Nandita Dasgupta Eric Lichtfouse  Editors

Nanopharmaceuticals: Principles and Applications Vol. 3

Environmental Chemistry for a Sustainable World Volume 48

Series Editors Eric Lichtfouse , Aix-Marseille University, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France Jan Schwarzbauer, RWTH Aachen University, Aachen, Germany Didier Robert, CNRS, European Laboratory for Catalysis and Surface Sciences, Saint-Avold, France

Other Publications by the Editors Books Environmental chemistry http://www.springer.com/978-3-540-22860-8 Organic Contaminants in Riverine and Groundwater Systems http://www.springer.com/978-3-540-31169-0 Sustainable Agriculture Volume 1: http://www.springer.com/978-90-481-2665-1 Volume 2: http://www.springer.com/978-94-007-0393-3 Book series Environmental Chemistry for a Sustainable World http://www.springer.com/series/11480 Sustainable Agriculture Reviews http://www.springer.com/series/8380 Journals Environmental Chemistry Letters http://www.springer.com/10311 More information about this series at http://www.springer.com/series/11480

Vinod Kumar Yata  •  Shivendu Ranjan Nandita Dasgupta  •  Eric Lichtfouse Editors

Nanopharmaceuticals: Principles and Applications Vol. 3

Editors Vinod Kumar Yata Animal Biotechnology Centre National Dairy Research Institute Karnal, Haryana, India Nandita Dasgupta Department of Biotechnology Institute of Engineering and Technology Lucknow, Uttar Pradesh, India

Shivendu Ranjan Faculty of Engineering and Built Environment University of Johannesburg Johannesburg, South Africa Eric Lichtfouse CNRS, IRD, INRA, Coll France, CEREGE Aix-Marseille University Aix-en-Provence, France

ISSN 2213-7114     ISSN 2213-7122 (electronic) Environmental Chemistry for a Sustainable World ISBN 978-3-030-47119-4    ISBN 978-3-030-47120-0 (eBook) https://doi.org/10.1007/978-3-030-47120-0 © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2020 This work is subject to copyright. All rights are solely and exclusively licensed by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors, and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This Springer imprint is published by the registered company Springer Nature Switzerland AG The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland

Preface

Nanopharmaceuticals are at the forefront of advanced medicine and its applications are rapidly growing in the fields of drug delivery and diagnosis. The third volume of this book provides more insightful and updated information about the synthesis, safety, and toxicity of nanopharmaceuticals. This book also describes transport phenomenon, dental and dermal delivery of nanopharmaceuticals. A couple of chapters are devoted to the applications of nanopharmaceuticals on cancer therapy and diagnosis. Chapter 1 emphasizes the safety issues of inorganic nanomaterials such as gold, silver, silica, copper, iron, and zinc nanoparticles. Toxicology profiling and cytotoxic studies of these nanoparticles were provided in this chapter. Chapter 2 focuses on development and applications of nanoparticle-based biosensors for cancer detection. This chapter provides information on different types of biosensors capable of detecting biomarkers of cancer. Chapter 3 is devoted to the novel approaches of nanotechnology towards advancements in dentistry. This chapter also focuses on different nanotools for dental ailments associated with bony as well as soft tissue defects. Chapter 4 deals with the synthesis of both organic and inorganic nanostructures along with their characterization techniques and challenges faced during their development. The first part of Chap. 5 deals with the basic concepts of electro spinning process and characterization techniques of electrospun nanofibers. The remaining part of the chapter covers drug-loaded nanofibers and recent applications of nanofibers in dermal drug delivery. Chapter 6 provides the extensive information on nanomaterials for immobilization of enzymes and biomedical applications of enzyme immobilized nanocarriers. Challenges and critical opinions are also discussed at the end of the chapter. Chapter 7 elucidates the toxicity of nanoparticles to different physiological systems and different methods to assess the toxicity of the nanoparticles for different organ systems using examples of in vivo systems. Chapter 8 presents recent updates and insightful information on chemistry, synthesis, characterization, and applications of dendrimers. v

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Chapter 9 focuses on the main pathways of nanoparticles to penetrate and permeate the epithelial barrier and novel bio responsive delivery systems. Final part of the chapter deals with the toxicity of nanoparticles and its impact on organisms. Chapter 10 provides information on advances in nano-theranostic materials. This chapter deals with nomenclature, bio-distribution, pharmacokinetics, surface functionalization, and application of nano-theranostics. Karnal, Haryana, India Johannesburg, South Africa Lucknow, Uttar Pradesh, India Aix-en-Provence, France

Vinod Kumar Yata Shivendu Ranjan Nandita Dasgupta Eric Lichtfouse

Contents

1 Inorganic Nanomaterials for Enhanced Therapeutic Safety ��������������    1 Sunaina Indermun, Mershen Govender, Pradeep Kumar, Yahya E. Choonara, and Viness Pillay 2 Nanoparticles Application for Cancer Diagnosis����������������������������������   25 Mohammad Ramezani, Mona Alibolandi, Fahimeh Charbgoo, Khalil Abnous, and Seyed Mohammad Taghdisi 3 Insights into Nanotools for Dental Interventions����������������������������������   53 Pooja Jain, Fahima Dilnawaz, and Zeenat Iqbal 4 Nanopharmaceuticals: Synthesis, Characterization, and Challenges ����������������������������������������������������������������������������������������   81 Sunita Ojha, Dharitri Saikia, and Utpal Bora 5 Electrospun Nanofibers as Carriers in Dermal Drug Delivery ����������  139 Meryem Sedef Erdal and Sevgi Güngör 6 Enzyme-Responsive and Enzyme Immobilized Nanoplatforms for Therapeutic Delivery: An Overview of Research Innovations and Biomedical Applications����������������������������������������������  165 Mohd Faheem Khan, Debasree Kundu, Manashjit Gogoi, Ashwinee Kumar Shrestha, Naikankatte G. Karanth, and Sanjukta Patra 7 Systemic Nanotoxicity and Its Assessment in Animal Models ������������  201 Vishal Sharma, Bharti Aneja, Vinod Kumar Yata, Dhruba Malakar, and Ashok Kumar Mohanty 8 Dendrimers as Drug Carriers for Cancer Therapy������������������������������  245 Narsireddy Amreddy, Anish Babu, Anupama Munshi, and Rajagopal Ramesh

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Contents

9 Nanoparticle Design to Improve Transport Across the Intestinal Barrier ������������������������������������������������������������������������������  271 Wai-Houng Chou, Tessa Lühmann, Lorenz Meinel, and Javier Octavio Morales 10 Recent Progress in Nanotheranostic Medicine��������������������������������������  317 Pravas R Sahoo, H. Madhyastha, R. Madhyastha, M. Maruyama, and Y. Nakajima Index������������������������������������������������������������������������������������������������������������������  335

About the Editors

Dr.  Vinod  Kumar  Yata  is an interdisciplinary researcher working at National Dairy Research Institute, Karnal, India. Previously, he worked as an Assistant Professor in Department of Biotechnology, Dr. B. R. Ambedkar National Institute of Technology Jalandhar, Punjab, India. Dr. Yata received his Ph.D. in Biotechnology from Indian Institute of Technology Guwahati. He specializes in interdisciplinary research which includes Nanotechnology, Microfluidics, Biotechnology, Cancer Biology, and Bioinformatics. Dr. Yata has developed a microfluidic device for the separation of live and motile spermatozoa from cattle semen samples. He opened up a new avenue for prodrug enzyme therapy by introducing nanocarriers for the delivery of non-mammalian prodrug activating enzymes. Dr. Yata elucidated the structural features and binding interactions of several bio molecules by in silico methods. He published several research papers in peer-reviewed international journals and presented papers in several international conferences.

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About the Editors

Dr.  Shivendu  Ranjan  has completed his B.Tech. and Ph.D. in Biotechnology from VIT University, Vellore, India, and has expertise in Nano(bio)technology. He was elected as a Fellow (FLS) of the oldest active biological society started in 1778, The Linnean Society (London), and he was an elected Fellow of Bose Scientific Society (FBSS). In 2018, he has been elected as Fellow of Indian Chemical Society (FICS) – a society founded in 1924. He has also been elected as Fellow (FIETA) of Indian Engineering Teachers Association. Currently, he is designated as a Senior Research Associate at Faculty of Engineering & Built Environment, University of Johannesburg, Johannesburg, South Africa. Recently he has been nominated as Strategic Head – Research & Development at Ennoble IP, Noida, India. He is also working as Visiting Faculty at the National Institute of Pharmaceutical Education and Research-R (NIPER-R), Lucknow. He is also designated as Vice President, Indian Chemical Society North Branch. Earlier, he has worked as Scientist at DST-Centre for Policy Research, Lucknow, supported by Ministry of Science and Technology, Govt. of India. He also worked as Head, Research & Technology Development at E-Spin Nanotech Pvt. Ltd., SIDBI Incubation Center, Indian Institute of Technology, Kanpur, India. He is also Advisor of many companies, e.g., Eckovation Solutions Pvt. Ltd. (IIT Delhi based start-up), Chaperon Biotech Pvt. Ltd (IIT Kanpur based start up), Kyntox Biotech India Pvt. Ltd., and Xcellogen Biotech Pvt. Ltd. Dr. Shivendu is also reviewer of Iran National Science Foundation (INSF), Tehran, Iran, and Jury at Venture Cup, Denmark, from the past 3 consecutive years. He had founded and drafted the concept for the first edition of the “VIT Bio Summit” in 2012, and the same has been continued till date by the university. He is the Associate Editor of Environmental Chemistry Letters (Springer journal of 4.6 impact factor). He is serving as an editorial board member and referee for reputed international peer-reviewed journals. He has published several scientific articles as well as books and has h-index of 21. He has bagged several awards and recognition from different national as well as international organizations.

About the Editors

xi

Dr.  Nandita  Dasgupta  completed her B.Tech. and Ph.D. from VIT University, Vellore, India, and is Elected Fellow (FBSS) of Bose Science Society. She has major working experience in Micro/Nanoscience and is currently working as Assistant Professor at Department of Biotechnology, Institute of Engineering and Technology, Lucknow, India. Earlier, at LV Prasad Eye Institute, Bhubaneswar, India, she worked on Mesenchymal stem cell–derived exosomes for the treatment of uveitis. Dr. Dasgupta has exposure of working at universities, research institutes, and industries, including VIT University, Vellore, Tamil Nadu, India; CSIR-Central Food Technological Research Institute, Mysore, India; Uttar Pradesh Drugs and Pharmaceutical Co. Ltd., Lucknow, India; and Indian Institute of Food Processing Technology (IIFPT), Thanjavur, Ministry of Food Processing Industries, Government of India. At IIFPT, Thanjavur, she was involved in a project funded by a leading pharmaceutical company, Dr. Reddy’s Laboratories, and has successfully engineered micro-vehicles for model drug molecules. Her areas of interest include Micro/Nanomaterial fabrication and its applications in various fields  – medicine, food, environment, and agriculture biomedical. Dr. Dasgupta has published 21 edited books and 1 authored book with Springer Switzerland. Dr. Dasgupta has authored many chapters and also published many scientific articles in international peer-reviewed journals. She is the associate editor of Environmental Chemistry Letters – a Springer journal of 3.2 impact factor – and also serving as editorial board member and referee for reputed international peerreviewed journals. Dr. Dasgupta has received several awards and recognitions from different national and international organizations.

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About the Editors

Dr. Eric Lichtfouse,  Ph.D., born in 1960, is an environmental chemist working at the University of Aix-Marseille, France. He has invented carbon-13 dating, a method allowing to measure the relative age and turnover of molecular organic compounds occurring in different temporal pools of any complex media. He is teaching scientific writing and communication and has published the book Scientific Writing for Impact Factors, which includes a new tool  – the Micro-Article  – to identify the novelty of research results. He is founder and Chief Editor of scientific journals and series in environmental chemistry and agriculture. He has founded the European Association of Chemistry and the Environment. He got the Analytical Chemistry Prize by the French Chemical Society, the Grand Prize of the Universities of Nancy and Metz, and a Journal Citation Award by the Essential Indicators.

Contributors

Khalil  Abnous  Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran Mona  Alibolandi  Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran Narsireddy Amreddy  Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Bharti  Aneja  Dairy Microbiology Division, National Dairy Research Institute, Karnal, Haryana, India Anish Babu  Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Utpal Bora  Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, India Fahimeh  Charbgoo  DWI-Leibniz Aachen, Germany

Institute

for

Interactive

Material,

Yahya  E.  Choonara­  Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

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Contributors

Wai-Houng Chou  Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago, Chile Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile Center of New Drugs for Hypertension (CENDHY), Santiago, Chile Fahima  Dilnawaz  Laboratory of Nanomedicine, Institute of Life Sciences, Bhubaneswar, Odisha, India Meryem  Sedef  Erdal  Faculty of Pharmacy, Department of Pharmaceutical Technology, Istanbul University, Istanbul, Turkey Manashjit  Gogoi  Biomedical Engineering Department, North Eastern Hill University, Shillong, Meghalaya, India Mershen  Govender  Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa Sevgi Güngör  Faculty of Pharmacy, Department of Pharmaceutical Technology, Istanbul University, Istanbul, Turkey Sunaina  Indermun  Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa Zeenat Iqbal  Department of Pharmaceutics, School of Pharmaceutical Education and Research (SPER), Jamia Hamdard, New Delhi, India Pooja  Jain  Department of Pharmaceutics, School of Pharmaceutical Education and Research (SPER), Jamia Hamdard, New Delhi, India Naikankatte G. Karanth  Department of Fermentation Technology, CSIR-Central Food Technological Research Institute, Mysuru, India Mohd  Faheem  Khan  Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India Pradeep  Kumar  Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa Debasree Kundu  Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India Tessa  Lühmann  Institute of Chemistry and Pharmacy, University of Würzburg, Würzburg, Germany

Contributors

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H.  Madhyastha  Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan R.  Madhyastha  Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan Dhruba  Malakar  Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, India M. Maruyama  Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan Lorenz  Meinel  Institute of Chemistry and Pharmacy, University of Würzburg, Würzburg, Germany Ashok Kumar Mohanty  Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, India Javier Octavio Morales  Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, University of Chile, Santiago, Chile Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile Center of New Drugs for Hypertension (CENDHY), Santiago, Chile Pharmaceutical Biomaterial Research Group, Department of Health Sciences, Luleå University of Technology, Luleå, Sweden Anupama  Munshi  Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Department of Radiation Oncology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Y. Nakajima  Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan Sunita Ojha  Bioengineering Research Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India Sanjukta Patra  Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India Viness Pillay  Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa Rajagopal  Ramesh  Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA Graduate Program in Biomedical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA

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Contributors

Mohammad  Ramezani  Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran Pravas  R  Sahoo  Department of Animal Biochemistry, College of Veterinary Science & Animal Husbandry, Odisha University of Agriculture & Technology, Bhubaneswar, Odisha, India Dharitri  Saikia  Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, India Vishal Sharma  Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, India Ashwinee  Kumar  Shrestha  Department of Pharmacy, Kathmandu University, Dhulikhel, Nepal Seyed  Mohammad  Taghdisi  Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran Vinod  Kumar  Yata  Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, India

Chapter 1

Inorganic Nanomaterials for Enhanced Therapeutic Safety Sunaina Indermun, Mershen Govender, Pradeep Kumar, Yahya E. Choonara, and Viness Pillay

Contents 1.1  I ntroduction 1.2  M  echanism of Toxicity 1.3  I norganic Nanomaterials Used in Drug Delivery 1.3.1  Metallic Nanomaterials 1.3.2  Nonmetallic Nanomaterials 1.4  Safety of Nanotheragnostic Agents 1.5  Nanomaterial Hazard Assessment 1.6  Conclusion References

   2    3    5    5  14  16  16  17  18

Abstract  Background/issues: Nanomaterials have been effectively and widely utilized in a variety of scientific disciplines to enhance biomedical applications. These nanomaterials are often organic or inorganic and often comprised of polymers or metal derivatives. The therapeutic safety of these often-toxic materials, however, is of paramount importance to ensure therapeutic safety. The safety of nanomaterials is therefore a widely undertaken research discipline evaluated both in vitro and in vivo. Major advances: This review provides for the currently undertaken research for the determination of therapeutic safety in inorganic nanomaterials. The importance of therapeutic safety, toxicity, and regulation of nanomaterials has been provided prior to the review of the respective nanomaterials. Specific focus has been given to metal-derived nanomaterials including gold, silver, silica, copper, iron, zinc, and titanium nanomaterials. Toxicology profiling and cytotoxicity studies of these nanomaterials have also been provided in addition to the in vivo studies that

S. Indermun · M. Govender · P. Kumar · Y. E. Choonara · V. Pillay (*) Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa e-mail: [email protected] © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2020 V. K. Yata et al. (eds.), Nanopharmaceuticals: Principles and Applications Vol. 3, Environmental Chemistry for a Sustainable World 48, https://doi.org/10.1007/978-3-030-47120-0_1

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have been undertaken and the potential for alternative nanomaterial safety assessments. Keywords  Multifunctional nanomaterials · Toxicity · Physicochemical properties · Gold · Silver · Silica · Copper · Iron · Zinc · Titanium dioxide

1.1  Introduction Exploited mainly for drug delivery applications, advances in the field of nanomaterials have been exponential. Offering the advantages of enhanced and efficacious delivery, nanomaterials improve the in vivo stability and solubility of active pharmaceutical agents (APIs) (Moghimi et  al. 2001; Jia et  al. 2013). Their nanosize correlates with many biological structures and organelles, making the nanomaterials appropriate for interactions at the submicron scale, thereby assisting in improving intracellular delivery, circulation, biodistribution, and the crossing of biological membranes (Singh and Lillard Jr 2009; Hassan et al. 2017). Beyond the conventional approach of using nanomaterials as delivery vehicles, nanomaterials have also been designed and developed to confer individual functionality in the fields of energy generation, devices, therapeutics, biomedical applications, and chemical assays including medical imaging and antimicrobial coatings. The advent of nanomaterials has also led to the development of functionalized nanotechnology-­based drug delivery systems that are able to diagnose, image, sense, and deliver therapeutics via conjugating moieties, such as aptamers, small molecules, and peptides (Lee et al. 2012). Gold nanoparticles, silver nanoparticles, copper nanoparticles, magnetic nanoparticles, and mesoporous silica are some examples of inorganic nanocarriers which are amenable to functionalization and in addition can provide tracking capabilities (Subbiah et al. 2010). Although nanomaterials offer attractive advantages, physicochemical properties such as shape, size, surface charge, structure, composition, functionalization, and dissolution could significantly affect their cytotoxicity and therapeutic safety (Sharifi et al. 2012; Nel et al. 2013). Organic-based nanomaterials such as polymeric micelles, nanoparticles, and liposomes, primarily consisting of biocompatible amphiphilic copolymers, are well-known for their therapeutic safety (Bi et al. 2008; Oh et al. 2008). Contrasting studies have been conducted in the past where some authors have demonstrated that inorganic nanoparticles are in fact suitable for in  vivo applications, whereas others have proved otherwise. Undoubtedly, the ability of nanomaterials to impart both action and interference at the cellular level renders many toxicity implications for such materials. This chapter will therefore detail the use, safety, and toxicity of inorganic nanomaterials with emphasis provided on the toxicology profiling and cytotoxicity studies of these nanomaterials in addition to the results of the in vivo studies that have been undertaken. Also provided for is the effectiveness of current safety profiling in addition to the potential for alternative nanomaterial safety assessments.

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1.2  Mechanism of Toxicity Nanoparticle toxicity is dependent on dose, route of administration, size, shape, lipophilicity, and exposure time and may interrupt the chemical and biological processes at various parts of the human anatomy such as at the molecular, cellular, and tissue levels (Johnston et  al. 2010; Schrand et  al. 2010; Wolfram et  al. 2015). Interactions between these nanoparticles and body’s biomolecules instantaneously occur upon delivery of the nanoparticles. This is due to the nanoparticles’ high surface free energy which results in the biomolecules coating the nanoparticles, forming the protein corona (Monopoli et al. 2012; Wolfram et al. 2014, 2015). Consisting of both a hard and soft layer, the protein corona can drastically influence the nanoparticle size, shape, and charge, ultimately changing the amount of protein interactions (Fig. 1.1; Wolfram et al. 2014). Additionally, the endogenous biomolecules may also undergo structural and functional alterations as a result. As mentioned, nanomaterial size, composition, and surface chemistry of nanomaterials are key determinants in their interactions with biological systems and their subsequent toxicity (Mirshafiee et al. 2017). These physicochemical properties may result in random membrane insertion, thereby leading to a cascade of signaling transductions that result in cytokine production and proinflammatory responses or eventual cell death. At the cellular level, peroxidative product accumulation, in vitro apoptosis, and cell antioxidant depletion can occur as a result of overproduction of reactive oxygen species (ROS) (Shang et al. 2014; Wang et al. 2016). Consequently, the redox state of the cell becomes imbalanced resulting in oxidative stress which has detrimental effects on the cells through protein, lipid, and DNA damage, resulting in cellular apoptosis and mutagenesis (Khanna et al. 2015). In order to ensure in vivo safety, well-defined methods to characterize and evaluate nanomaterials are required. Cellular homeostasis can be affected by inorganic nanomaterials, thus Fig. 1.1 Schematic representation of the current protein corona hypothesis. A hard and soft layer of proteins covers the surface of the nanoparticle. The proteins in the hard corona are more tightly associated with the particle surface, making them less dynamic than the proteins in the soft corona. (Reproduced from Wolfram et al. 2014, © 2014 Elsevier B.V)

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allowing for a cascade of possible effects. Several mechanisms may result in such effects which are detailed in Fig. 1.2. At the cellular level, nanoparticles may disrupt membrane integrity resulting in cellular leakage and disruption or destruction of cellular function. Lysosomal membrane dysfunction has been reported to be caused by polycation particles (Molinaro et  al. 2013), zinc oxide (Cho et  al. 2011), and titanium dioxide (Hamilton et  al. 2009), resulting in endoplasmic reticulum stress, mitochondrial dysfunction, oxidative stress, and protein aggregation (Stern et al. 2012). Organ-related nanoparticle toxicity also occurs as a result of nanoparticle accumulation due to toxicity occurring at the molecular and cellular levels as well as through immunological responses.

Fig. 1.2  Cytotoxic effects of nanoparticles. In the biological environment, nanoparticles may trigger the production of reactive oxygen species (ROS). Elevated ROS levels may lead to (i) activation of cellular stress-dependent signaling pathways, (ii) direct damage of subcellular organelles such as mitochondria, and (iii) DNA fragmentation in the nucleus, resulting in cell cycle arrest, apoptosis, and inflammatory response. Nanoparticles may interact with membrane-bound cellular receptors, e.g., growth factor (GF) receptors and integrins, inducing cellular phenotypes such as proliferation, apoptosis, differentiation, and migration. After internalization via endocytic pathways, nanoparticles are trafficked along the endolysosomal network within vesicles with the help of motor proteins and cytoskeletal structures. To access cytoplasmic or nuclear targets, nanoparticles must escape from the endolysosomal network and traverse through the crowded cytoplasm. (Reproduced from Shang et al. 2014 © Shang et al.; licensee BioMed Central Ltd. 2014, distributed under a CC-BY 2.0)

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1.3  Inorganic Nanomaterials Used in Drug Delivery 1.3.1  Metallic Nanomaterials Gold Nanoparticles Possessing appreciable properties such as unique optical and electric properties and ease of functionalization with targeting moieties, drugs, and polymers using gold-­ thiol bonds, gold (Au) nanoparticles have been widely studied and employed in various applications such as drug delivery, photothermal delivery, and cellular and diagnostic imaging (Dreaden et al. 2012; Jia et al. 2013; Cheng et al. 2017). A study undertaken by Huo (2010) employed Au nanoparticle-based protein complex aggregation biomarker assays for the detection and diagnosis of cancer. Since these Au nanoparticles may be easily functionalized through simple bioconjugation techniques in a range of shapes and sizes, their cytotoxicity may thus be easily affected. Below sizes of 4–5 nm in diameter, Au nanoparticles are catalytically active and may induce cytotoxicity (Falagan-Lotsch et al. 2016). Additionally, many toxicity studies have found Au nanoparticles with sizes greater than 4–5 nm in diameter to be nontoxic after acute exposure (Alkilany and Murphy 2010; Khlebtsov and Dykman 2011; Soenen et al. 2011). Particles of this size are considered mostly nontoxic to the mitochondrial cells; however, oxidative stress and mitochondrial damage can be incurred in cultured cells due to their high surface reactivity (Dreaden et al. 2012). Au nanoparticles of 5 nm are generally used in nanomedicine and are presumed safe in drug delivery applications and photothermal therapy, with particles larger than 5 nm having the potential to result in cellular toxicity (Alkilany and Murphy 2010). Different cell type sensitivities and the use of high concentrations of Au nanoparticles may also attribute to other cases of acute toxicity (Patra et al. 2007; Mironava et al. 2010; Khlebtsov and Dykman 2011). After in vivo administration, Au nanoparticles have not been fully investigated for their long-term toxicological effects. Au nanoparticles have also been known to display an accumulation of degradation products as well as a reduced clearance of several months, possibly resulting in chronic toxicity (Khlebtsov and Dykman 2011; Kolosnjaj-Tabi et al. 2015). In addition, nephrotoxicity and erythrocytic cellular death have also been shown in vivo (Sereemaspun et al. 2008; Sopjani et al. 2008). Studies have also shown that Au nanoparticle surface charge influences cellular uptake properties. The negatively charged cell surface residues have a higher affinity for cationic gold nanoparticles as compared to their anionic counterparts. Nevertheless, studies have demonstrated that the cationic nanoparticle surface charge can also result in an increased cytotoxicity in airway cells BEC and ASM and the ovarian cancer cells CP70, A2780 (Arvizo et al. 2010), and HeLa (Hauck et  al. 2008) due to their altered surface properties associated with reduced particle size.

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Additionally, due to their high biocompatibility and bioinert character, Au nanoparticles have also been extensively applied in diagnostic applications and gene delivery. However, for endothelial and epithelial applications, the presence of stabilizers such as sodium citrate residues on the Au nanoparticles was revealed to affect the proliferation and induce cytotoxicity in human alveolar type II (AT II)like cells, human cerebral microvascular endothelial cells (hcMEC/D3), and human dermal microvascular endothelial cells (HDMEC). The study was carried out to determine if these effects were related to the varying degree of internalization of the Au nanoparticles, to surface sodium citrate on the Au nanoparticles, or to nanoparticle size. Differing uptake behaviors for citrate-stabilized Au nanoparticles were observed for the epithelial and endothelial cells. Concentration-dependent cytotoxicity was also observed after exposure to the Au nanoparticles (Fig.  1.3). It was demonstrated that the lower the degree of purification, the less cell viability and proliferation occurred concluding that the safety of Au nanoparticles may be enhanced with the abridged addition of sodium citrate (Freese et al. 2012). Falagan-Lotsch and coworkers (2016) investigated the long-term in vitro effect on human dermal fibroblasts of two shapes of Au nanoparticles. The study was conducted on both nanorods and nanospheres under both chronic and nonchronic conditions. It was determined that the oxidative stress and inflammation gene expression could be modified with a subcytotoxic dose of Au nanoparticles, with the effect lasting over 20  weeks. The results indicated that the cell stress response is not reversible over time upon removal of the nanoparticles after acute exposure and that the cells can adaptively respond to chronic, low-level nanoparticle insults (Falagan-­ Lotsch et al. 2016). Interestingly, in the study undertaken by Falagan-Lotsch et al. (2016), the surface chemistry of polyethylene glycol was found to be not as benign as is generally assumed. These studies investigating the toxicological effects of Au nanoparticles therefore suggest that long-term studies are warranted, rather than their acute counterparts, to elucidate better, safety profiles of gold nanomaterials. Silver Nanoparticles Used in various antimicrobial applications, silver (Ag) nanoparticles have been implicated in major health concerns due to their toxicological impacts on various organs (Mirshafiee et al. 2017). A notable effect of chronic silver exposure is argyria in humans (Wijnhoven et al. 2009). Ag nanoparticles release toxic silver ions following particle dissolution resulting in significant cytotoxicity via ROS generation (Wang et al. 2014; Zhornik et al. 2014; Osborne et al. 2015; Zhang et al. 2015). Furthermore, these Ag nanoparticles may migrate to the brain, lungs, kidneys, liver, and spleen following detachment from colloidal silver wound dressings (Ahamed et al. 2010). Peripheral multiorgan inflammation caused by Ag nanoparticles was demonstrated by Guo and coworkers (2016). Focusing on interendothelial junctions, the mechanisms of action of Ag nanoparticles and silver nitrate (AgNO3) were compared employing primary human umbilical vein endothelial

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Fig. 1.3  (I) Internalization of gold nanoparticles in HDMEC and hCMEC/D3 analyzed by transmission electron microscopy. HDMEC (a–c) and hCMEC/D3 (d–f) were incubated with 300 μM gold nanoparticles for 24 h. After exposure, cells were extensively washed, fixed with paraformaldehyde, and examined by transmission electron microscopy (TEM). AuS0302-RIT, AuS0302-­ RIS02, and AuS0302-RIS04 were found in intracellular vesicles which were mostly located in the perinuclear region. The arrow heads indicate the gold nanoparticles within the vesicles. Scale bar: 1 μm. (II) Quantification of internalized gold nanoparticles in endothelial and epithelial cells by ICP-AES. Both epithelial cells (H441 and A549) and endothelial cells (HDMEC and hCMEC/D3) were incubated with 50 μM gold nanoparticles at 37 °C for 24 h. Cells were extensively washed, lysed by aqua regia (3:1 hydrochloric acid/nitric acid), and analyzed for gold concentration by ICP-AES. In (a) the total number of particles per area was calculated, while in (b) the percentage uptake of particles into cells, as a function of the total amount applied, was determined. (Reproduced with permission from Freese et al. 2012 © Freese et al.; licensee BioMed Central Ltd. 2012, distributed under a CC-BY 2.0)

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cells (HUVEC). It was shown that endothelial endocytosis was primarily due to Ag nanoparticles as opposed to AgNO3. This study determined increased intracellular ROS and VE-cadherin downregulation resulting in the disruption of the integrity of the endothelial layer between the endothelial cells caused by Ag nanoparticles which interestingly could be remedied by N-acetylcysteine (Fig.  1.4). However, AgNO3 (>20 μg/mL) resulted in direct cell death without ROS induction at lower concentrations. Notably, peripheral inflammation was induced in the liver, lungs, and kidneys from Ag nanoparticle release with the severity increasing in relation to the diameter of the Ag nanoparticles used.

Fig. 1.4  The viability and intracellular ROS of cells exposed with Ag nanoparticles or AgNO3: (A) Cell viability from CCK-8 assay. (B) The intracellular ROS level caused by Ag nanoparticle or AgNO3 exposure for 1 h. The H2O2 group was set as the positive control. The ∗ represents significant difference between control group and Ag nanoparticle-75-treated group (∗: p