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8 protocols using soybean phosphatidylcholine

1

Pneumococcal Conjugate Vaccine Formulation

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Low molecular weight chitosan (C8H15NO6)n powder with 75% degree of deacetylation and soybean phosphatidylcholine were purchased from Sigma-Aldrich, USA. The Quil-A saponin adjuvant was a gift from Dr. Erik B. Lindblad and Brenntag Biosector, Denmark. The 13-valent pneumococcal conjugate vaccine (PCV13; Prevnar®; Pfizer Inc.) as a PCV antigen model was commercially acquired. The PCV13 contains the capsular polysaccharide antigens of Streptococcus pneumoniae serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F which individually conjugated to the nontoxic diphtheria toxin mutant CRM197.
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2

Liposomal Encapsulation of Rhodamine B

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LX received as a gift from Delta Pharma, 10th of Ramadan City, Cairo, Egypt. Bile salt sodium deoxycholate (SDC), soybean phosphatidyl choline (SPC), limonene, chloroform, methanol, acetonitrile (HPLC grade) and rhodamine B were bought from Sigma Chemical Company. Ethanol (95%) was provided from El-Nasr Pharmaceutical Chemicals Co. (Cairo, Egypt). All other chemicals and solvents were of analytical grade and were used as received.
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3

Lipid-Based Nanocarrier Synthesis and Characterization

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Maleimide-PEG2000-COOH was purchased from Shanghai Yare Biotech Inc, (Shanghai, People’s Republic of China). Human Tf (iron-free) and L-α-phosphatidylethanolamine (PE) were purchased from Sigma-Aldrich Corp (St Louis, MO, USA). Tf-PEG-PE was synthesized by our group. 3-[4,5-dimehyl-2-thiazolyl]-2,5-diphenyl-2H-tetrazolium bromide (MTT), DOX·HCl, stearic acid, dimethyldiocta-decylammonium bromide (DDAB), soybean phosphatidylcholine, triethylamine (TEA), and Tween® 80 were purchased from Sigma-Aldrich. Precirol® ATO 5 was generously provided by Gattefossé (St Priest, France). Injectable soya lecithin was obtained from Shanghai Taiwei Pharmaceutical Co, Ltd., (Shanghai, People’s Republic of China). Enhanced green fluorescence protein plasmid (pEGFP)-N1 was provided by Shandong University (Shandong, People’s Republic of China). Quant-iT™ PicoGreen® double-stranded (ds) DNA quantitation reagent was obtained from Invitrogen by Life Technologies (Carlsbad, CA, USA). All other chemicals were of analytical grade or higher.
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4

Lipid-based Nanoparticle Formulation

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Calycoin, soybean phosphatidylcholine (SPC), cholesterol, 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPE-mPEG2000), 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT), and fetal bovine serum (FBS) were purchased from Sigma Co., Ltd. (Miami, USA). All other materials were of analytical grade.
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5

Simvastatin Lipid Nanoformulation Development

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Simvastatin (SMV) was kindly obtained from Hikma Pharma (Cairo, Egypt). Soybean phosphatidylcholine (SPC), sodium deoxycholate (SDC), cholesterol, Span60, hydroxypropyl methyl cellulose and dialysis bags (molecular weight cut-off of 12–14 KDa) were purchased from Sigma-Aldrich (St. Louis, MO, USA).
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6

Vardenafil Lipid Nanoparticle Formulation

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Vardenafil (VDF) was provided by G.N.P. Co. (6th of October City, Giza, Egypt). Cholesterol, hydroxypropyl cellulose (100,000 cps), sodium deoxycholate (SDC), and soybean phosphatidylcholine (SPC) were purchased from Sigma Aldrich (St. Louis, MO, USA). All other chemicals and reagents used were of analytical grade.
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7

Evaluation of Soybean Phospholipid Formulations

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SM (purity >80%) was purchased from Dalian Meilun Biotech Co, Ltd (Dalian, People’s Republic of China). Soybean phosphatidylcholine (purity >90%) and hydrogenated Soybean phosphatidylcholine (purity >95%) were obtained from Sigma-Aldrich (St Louis, MO, USA). SGC was supplied by Sinopharm Chemical Reagent Co Ltd (Shanghai, People’s Republic of China). Yiganling tablets were provided by Zhaohui Pharmaceutical Company (Shanghai, People’s Republic of China). CO2 with a purity of 99.99% was obtained from Shanghai Jiao Tong University (Shanghai, People’s Republic of China). All other chemicals were reagent grade and used as received.
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8

Sildenafil Citrate Liposomal Formulation

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Sildenafil citrate (SDF)
was supplied from Mash Premiere for the pharmaceutical industry (Cairo,
Egypt). Cholesterol, sodium deoxycholate (SDC), Span 60, soybean phosphatidylcholine
(SPC), and cellulose membrane (12,000–14,000 Da MWCO) were
procured from Sigma-Aldrich (St. Louis, MO, USA).
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