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Authors = C. Sahi

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17 pages, 9157 KiB  
Article
Plant Cell-Engineered Gold Nanoparticles Conjugated to Quercetin Inhibit SARS-CoV-2 and HSV-1 Entry
by James Elste, Sangeeta Kumari, Nilesh Sharma, Erendira Palomino Razo, Eisa Azhar, Feng Gao, Maria Cuevas Nunez, Wasim Anwar, John C. Mitchell, Vaibhav Tiwari and Shivendra Sahi
Int. J. Mol. Sci. 2023, 24(19), 14792; https://doi.org/10.3390/ijms241914792 - 30 Sep 2023
Cited by 3 | Viewed by 2868
Abstract
Recent studies have revealed considerable promise in the antiviral properties of metal nanomaterials, specifically when biologically prepared. This study demonstrates for the first time the antiviral roles of the plant cell-engineered gold nanoparticles (pAuNPs) alone and when conjugated with quercetin (pAuNPsQ). We show [...] Read more.
Recent studies have revealed considerable promise in the antiviral properties of metal nanomaterials, specifically when biologically prepared. This study demonstrates for the first time the antiviral roles of the plant cell-engineered gold nanoparticles (pAuNPs) alone and when conjugated with quercetin (pAuNPsQ). We show here that the quercetin conjugated nanoparticles (pAuNPsQ) preferentially inhibit the cell entry of two medically important viruses—severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and herpes simplex virus type-1 (HSV-1) using different mechanisms. Interestingly, in the case of SARS-CoV-2, the pre-treatment of target cells with pAuNPsQ inhibited the viral entry, but the pre-treatment of the virus with pAuNPsQ did not affect viral entry into the host cell. In contrast, pAuNPsQ demonstrated effective blocking capabilities against HSV-1 entry, either during the pre-treatment of target cells or by inducing virus neutralization. In addition, pAuNPsQ also significantly affected HSV-1 replication, evidenced by the plaque-counting assay. In this study, we also tested the chemically synthesized gold nanoparticles (cAuNPs) of identical size and shape and observed comparable effects. The versatility of plant cell-based nanomaterial fabrication and its modification with bioactive compounds opens a new frontier in therapeutics, specifically in designing novel antiviral formulations. Full article
(This article belongs to the Special Issue Recent Research of Nanomaterials in Molecular Science)
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7 pages, 388 KiB  
Article
Capecitabine or Infusional 5-fluorouracil for Gastroesophageal Cancer: A Cost–Consequence Analysis
by A.M. Horgan, J.J. Knox, G. Liu, C. Sahi, P.A. Bradbury and Natasha Leighl
Curr. Oncol. 2011, 18(2), 64-70; https://doi.org/10.3747/co.v18i2.730 - 1 Apr 2011
Cited by 5 | Viewed by 677
Abstract
Background: In patients with advanced gastroesophageal cancer, the phase III Randomized ECF for Advanced and Locally Advanced Esophagogastric Cancer 2 (REAL-2) trial demonstrated equivalent clinical efficacy when capecitabine (x) was substituted for 5-fluorouracil (5FU) in the epirubicin–cisplatin–5FU ( [...] Read more.
Background: In patients with advanced gastroesophageal cancer, the phase III Randomized ECF for Advanced and Locally Advanced Esophagogastric Cancer 2 (REAL-2) trial demonstrated equivalent clinical efficacy when capecitabine (x) was substituted for 5-fluorouracil (5FU) in the epirubicin–cisplatin–5FU (ECF) regimen. Methods: The present analysis compares the direct medical costs associated with both regimens. This cost–consequence analysis of direct medical costs took resource utilization data from the REAL-2 trial where available. Direct medical costs were derived from the perspective of the Canadian public health care system in 2008 Canadian dollars. Mean cost per patient on each treatment arm was calculated. Results: Drug costs from start of treatment until first progression, including pre- and post-chemotherapy medications and administration costs, totalled $5,344 for ECX as compared with $3,187 for ECF. Costs for treatment of adverse events were estimated at $2,621 for ECX as compared with $3,397 for ECF. An additional cost of $873 was associated with insertion of an implanted venous access. Total incremental cost of ECX over ECF was $508. Conclusions: In advanced gastroesophageal cancer, capecitabine is an attractive alternative to 5FU. Although the drug cost per se is greater, use of capecitabine is associated with decreased consumption of hospital resources. Not only does capecitabine fit with patient preference for oral therapy, it also avoids the inconvenience and complications of central venous access. Full article
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