One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers
Shameer Ahmed,1 Gunjan Baijal,2 Rudrappa Somashekar,3 Subramania Iyer,4 Vijayashree Nayak1 1Department of Biological Sciences, Birla Institute of Technology & Science, Pilani, K.K. Birla Goa Campus, Sancoale, Goa, India; 2Department of Radiation Oncology, Manipal Hospital Goa, Panaji, Goa, India...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Dove Medical Press
2021-10-01
|
| Series: | International Journal of Nanomedicine |
| Subjects: | |
| Online Access: | https://www.dovepress.com/one-pot-synthesis-of-pegylated-bimetallic-goldsilver-nanoparticles-for-peer-reviewed-fulltext-article-IJN |
| _version_ | 1818401084716089344 |
|---|---|
| author | Ahmed S Baijal G Somashekar R Iyer S Nayak V |
| author_facet | Ahmed S Baijal G Somashekar R Iyer S Nayak V |
| author_sort | Ahmed S |
| collection | DOAJ |
| description | Shameer Ahmed,1 Gunjan Baijal,2 Rudrappa Somashekar,3 Subramania Iyer,4 Vijayashree Nayak1 1Department of Biological Sciences, Birla Institute of Technology & Science, Pilani, K.K. Birla Goa Campus, Sancoale, Goa, India; 2Department of Radiation Oncology, Manipal Hospital Goa, Panaji, Goa, India; 3Centre for Materials Science and Technology, Vijnana Bhavan, Mysore, Karnataka, India; 4Department of Head and Neck Oncology, Amrita Institute of Medical Sciences, Ponekkara, Cochin, IndiaCorrespondence: Vijayashree NayakDepartment of Biological Sciences, Birla Institute of Technology and Science, Pilani, K.K. Birla Goa Campus, NH 17B, Bypass Road, Zuarinagar, Sancoale, Goa, 403726, IndiaTel +91 832 258 0101 (Ext. 161)Email vijayashree@goa.bits-pilani.ac.inBackground: Radiotherapy is an important treatment modality for many types of head and neck squamous cell carcinomas. Nanomaterials comprised of high atomic number (Z) elements are novel radiosensitizers enhance radiation injury by production of free radicals and subsequent DNA damage. Gold nanoparticles are upcoming as promising radiosensitizers due to their high (Z) biocompatibility, and ease for surface engineering. Bimetallic nanoparticles have shown enhanced anticancer activity compared to monometallic nanoparticles.Materials and Methods: PEG-coated Au–Ag alloy nanoparticles (BNPs) were synthesized using facile one pot synthesis techniques. Size of ∼ 50± 5nm measured by dynamic light scattering. Morphology, structural composition and elemental mapping were analyzed by electron microscopy and SAXS (small-angle X-ray scattering). The radiosensitization effects on KB oral cancer cells were evaluated by irradiation with 6MV X-rays on linear accelerator. Nuclear damage was imaged using confocal microscopy staining cells with Hoechst stain. Computed tomography (CT) contrast enhancement of BNPs was compared to that of the clinically used agent, Omnipaque.Results: BNPs were synthesized using PEG 600 as reducing and stabilizing agent. The surface charge of well dispersed colloidal BNPs solution was − 5mV. Electron microscopy reveals spherical morphology. HAADF-STEM and elemental mapping studies showed that the constituent metals were Au and Ag intermixed nanoalloy. Hydrodynamic diameter was ∼ 50± 5nm due to PEG layer and water molecules absorption. SAXS measurement confirmed BNPs size around 35nm. Raman shift of around 20 cm− 1 was observed when BNPs were coated with PEG. 1H NMR showed extended involvement of −OH in synthesis. BNPs efficiently enter cytoplasm of KB cells and demonstrated potent in vitro radiosensitization with enhancement ratio ∼ 1.5– 1.7. Imaging Hoechst-stained nuclei demonstrated apoptosis in a dose-dependent manner. BNPs exhibit better CT contrast enhancement ability compared to Omnipaque.Conclusion: This bimetallic intermix nanoparticles could serve a dual function as radiosensitizer and CT contrast agent against oral cancers, and by extension possibly other cancers as well.Keywords: bimetallic intermix alloy nanoparticles, radiosensitizers, nanomedicine, PEG, poly ethylene glycol, CT contrast, apoptosis |
| first_indexed | 2024-12-14T07:46:51Z |
| format | Article |
| id | doaj.art-61cdfb36582d435c862049e53e26dc61 |
| institution | Directory Open Access Journal |
| issn | 1178-2013 |
| language | English |
| last_indexed | 2024-12-14T07:46:51Z |
| publishDate | 2021-10-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | International Journal of Nanomedicine |
| spelling | doaj.art-61cdfb36582d435c862049e53e26dc612022-12-21T23:10:53ZengDove Medical PressInternational Journal of Nanomedicine1178-20132021-10-01Volume 167103712169925One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral CancersAhmed SBaijal GSomashekar RIyer SNayak VShameer Ahmed,1 Gunjan Baijal,2 Rudrappa Somashekar,3 Subramania Iyer,4 Vijayashree Nayak1 1Department of Biological Sciences, Birla Institute of Technology & Science, Pilani, K.K. Birla Goa Campus, Sancoale, Goa, India; 2Department of Radiation Oncology, Manipal Hospital Goa, Panaji, Goa, India; 3Centre for Materials Science and Technology, Vijnana Bhavan, Mysore, Karnataka, India; 4Department of Head and Neck Oncology, Amrita Institute of Medical Sciences, Ponekkara, Cochin, IndiaCorrespondence: Vijayashree NayakDepartment of Biological Sciences, Birla Institute of Technology and Science, Pilani, K.K. Birla Goa Campus, NH 17B, Bypass Road, Zuarinagar, Sancoale, Goa, 403726, IndiaTel +91 832 258 0101 (Ext. 161)Email vijayashree@goa.bits-pilani.ac.inBackground: Radiotherapy is an important treatment modality for many types of head and neck squamous cell carcinomas. Nanomaterials comprised of high atomic number (Z) elements are novel radiosensitizers enhance radiation injury by production of free radicals and subsequent DNA damage. Gold nanoparticles are upcoming as promising radiosensitizers due to their high (Z) biocompatibility, and ease for surface engineering. Bimetallic nanoparticles have shown enhanced anticancer activity compared to monometallic nanoparticles.Materials and Methods: PEG-coated Au–Ag alloy nanoparticles (BNPs) were synthesized using facile one pot synthesis techniques. Size of ∼ 50± 5nm measured by dynamic light scattering. Morphology, structural composition and elemental mapping were analyzed by electron microscopy and SAXS (small-angle X-ray scattering). The radiosensitization effects on KB oral cancer cells were evaluated by irradiation with 6MV X-rays on linear accelerator. Nuclear damage was imaged using confocal microscopy staining cells with Hoechst stain. Computed tomography (CT) contrast enhancement of BNPs was compared to that of the clinically used agent, Omnipaque.Results: BNPs were synthesized using PEG 600 as reducing and stabilizing agent. The surface charge of well dispersed colloidal BNPs solution was − 5mV. Electron microscopy reveals spherical morphology. HAADF-STEM and elemental mapping studies showed that the constituent metals were Au and Ag intermixed nanoalloy. Hydrodynamic diameter was ∼ 50± 5nm due to PEG layer and water molecules absorption. SAXS measurement confirmed BNPs size around 35nm. Raman shift of around 20 cm− 1 was observed when BNPs were coated with PEG. 1H NMR showed extended involvement of −OH in synthesis. BNPs efficiently enter cytoplasm of KB cells and demonstrated potent in vitro radiosensitization with enhancement ratio ∼ 1.5– 1.7. Imaging Hoechst-stained nuclei demonstrated apoptosis in a dose-dependent manner. BNPs exhibit better CT contrast enhancement ability compared to Omnipaque.Conclusion: This bimetallic intermix nanoparticles could serve a dual function as radiosensitizer and CT contrast agent against oral cancers, and by extension possibly other cancers as well.Keywords: bimetallic intermix alloy nanoparticles, radiosensitizers, nanomedicine, PEG, poly ethylene glycol, CT contrast, apoptosishttps://www.dovepress.com/one-pot-synthesis-of-pegylated-bimetallic-goldsilver-nanoparticles-for-peer-reviewed-fulltext-article-IJNbimetallic intermix alloy nanoparticlesradiosensitizersnanomedicinepeg- poly ethylene glycolct contrastapoptosis |
| spellingShingle | Ahmed S Baijal G Somashekar R Iyer S Nayak V One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers International Journal of Nanomedicine bimetallic intermix alloy nanoparticles radiosensitizers nanomedicine peg- poly ethylene glycol ct contrast apoptosis |
| title | One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers |
| title_full | One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers |
| title_fullStr | One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers |
| title_full_unstemmed | One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers |
| title_short | One Pot Synthesis of PEGylated Bimetallic Gold–Silver Nanoparticles for Imaging and Radiosensitization of Oral Cancers |
| title_sort | one pot synthesis of pegylated bimetallic gold ndash silver nanoparticles for imaging and radiosensitization of oral cancers |
| topic | bimetallic intermix alloy nanoparticles radiosensitizers nanomedicine peg- poly ethylene glycol ct contrast apoptosis |
| url | https://www.dovepress.com/one-pot-synthesis-of-pegylated-bimetallic-goldsilver-nanoparticles-for-peer-reviewed-fulltext-article-IJN |
| work_keys_str_mv | AT ahmeds onepotsynthesisofpegylatedbimetallicgoldndashsilvernanoparticlesforimagingandradiosensitizationoforalcancers AT baijalg onepotsynthesisofpegylatedbimetallicgoldndashsilvernanoparticlesforimagingandradiosensitizationoforalcancers AT somashekarr onepotsynthesisofpegylatedbimetallicgoldndashsilvernanoparticlesforimagingandradiosensitizationoforalcancers AT iyers onepotsynthesisofpegylatedbimetallicgoldndashsilvernanoparticlesforimagingandradiosensitizationoforalcancers AT nayakv onepotsynthesisofpegylatedbimetallicgoldndashsilvernanoparticlesforimagingandradiosensitizationoforalcancers |