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Łozińska N, Maldonado-Valderrama J, Del Castillo-Santaella T, Zhou Y, Martysiak-Żurowska D, Lu Y, Jungnickel C. Bile conjugation and its effect on in vitro lipolysis of emulsions. Food Res Int 2024; 184:114255. [PMID: 38609233 DOI: 10.1016/j.foodres.2024.114255] [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: 01/09/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/14/2024]
Abstract
Bile Salts (BS) are responsible for stimulating lipid digestion in our organism. Gut microbiota are responsible for the deconjugation process of primary conjugated to secondary unconjugated BS. We use two structurally distinct BS and characterize the rate of lipolysis as a compound parameter. A static in-vitro digestion model as well as meta-analysis of literature data has been performed to determine the most influential factors affecting the lipid digestion process. The results demonstrate that lipolysis of emulsions using conjugated BS (NaTC, FFA = 60.0 %, CMC in SIF = 5.58 mM, MSR of linoleic acid = 0.21, rate of adsorption = -0.057 mN/m.s) enhances the release of FFA compared to deconjugated BS (NaDC, FFA = 49.5 %, CMC in SIF = 2.49 mM, MSR of linoleic acid = 0.16 rate of adsorption = -0.064 mN/m.s). These results indicate that conjugation plays an important role in controlling the rate of lipolysis in our organism which can be in turn, tuned by the microflora composition of our gut, ultimately controlling the rate of deconjugation of the BS.
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Affiliation(s)
- Natalia Łozińska
- Department of Biotechnology and Microbiology, Faculty of Chemistry, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk 80-233, Poland.
| | - Julia Maldonado-Valderrama
- Department of Applied Physics, Faculty of Sciences, University of Granada, Campus de Fuentenueva sn, 18071 Granada, Spain.
| | - Teresa Del Castillo-Santaella
- Department of Physical Chemistry, Faculty of Pharmacy, University of Granada, Campus de Cartuja sn, 18071 Granada, Spain.
| | - Yanija Zhou
- Department of Biotechnology and Microbiology, Faculty of Chemistry, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk 80-233, Poland.
| | - Dorota Martysiak-Żurowska
- Department of Chemistry, Technology and Biotechnology of Food, Chemical Faculty, Gdańsk University of Technology, Gdańsk, Poland.
| | - Yuanqi Lu
- School of Chemistry and Chemical Engineering, Dezhou University, 566 Daxue W Rd, Shandong Sheng 253034, China.
| | - Christian Jungnickel
- Department of Biotechnology and Microbiology, Faculty of Chemistry, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk 80-233, Poland.
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2
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Salt LJ, Mandalari G, Parker ML, Hussein M, Mills CE, Gray R, Berry SE, Hall W, Wilde PJ. Mechanisms of interesterified fat digestibility in a muffin matrix using a dynamic gastric model. Food Funct 2023; 14:10232-10239. [PMID: 37916919 DOI: 10.1039/d3fo02963h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Industrially generated trans-fats have been linked with cardiovascular disease (CVD) and have thus been replaced by interesterified (IE) fats, in foods. Interesterification rearranges fatty acids on the glycerol backbone of a triacylglycerol molecule. However, the impact of IE fat on health is unknown. We recently reported differences in lipid absorption kinetics between IE and rapeseed oil (RO). Here, we investigated the mechanisms underpinning IE fat digestion kinetics in the same muffins baked using an IE fat, non-IE fat [with the same fatty acid composition] and rapeseed oil (RO) under simulated conditions. IE and non-IE fats were largely solid in the gastric phase and strongly associated within the muffin matrix, whereas RO formed liquid droplets which separated from the matrix. No significant difference in lipolysis rates was detected between IE and non-IE fats. The lipolysis of the RO fat was slower, due to long-chain PUFAs. Interesterification itself did not affect digestibility, but the strong interaction between the hard fats and the muffin matrix resulted in extensive creaming of the matrix in the stomach, leading to delayed gastric emptying compared to the RO sample. The rate and extent of lipolysis were determined by the amount of fat available and the structure of the fat. This demonstrates the importance of the physical behaviour of the fats during digestion and provides a mechanistic understanding of the overall lipid digestion of IE fats, which relates to their physiological response.
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Affiliation(s)
- Louise J Salt
- Food Innovation and Health Programme, Quadram Institute Bioscience, Norwich, NR4 7UA, UK.
| | - Giuseppina Mandalari
- Department of Chemical, Biological, Pharmaceutical and Environmental Science, University of Messina, Messina, Italy
| | - Mary L Parker
- Food Innovation and Health Programme, Quadram Institute Bioscience, Norwich, NR4 7UA, UK.
| | - Mahamoud Hussein
- Food Innovation and Health Programme, Quadram Institute Bioscience, Norwich, NR4 7UA, UK.
| | - Charlotte E Mills
- Department of Nutritional Sciences, King's College London, UK
- Department of Food and Nutritional Sciences, University of Reading, UK
| | - Robert Gray
- Department of Nutritional Sciences, King's College London, UK
| | - Sarah E Berry
- Department of Nutritional Sciences, King's College London, UK
| | - Wendy Hall
- Department of Nutritional Sciences, King's College London, UK
| | - Peter J Wilde
- Food Innovation and Health Programme, Quadram Institute Bioscience, Norwich, NR4 7UA, UK.
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3
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alsedfy M, Said A, alfattah KA, mahmoud M. The impact of ascorbic acid (E 300) on digestion of different nutrients using In Vitro digestion model.. [DOI: 10.21203/rs.3.rs-3108018/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Abstract
Ascorbic acid is a very common antioxidant food additive and vitamin supplement which is used by human on daily basis. Especially during corona virus pandemic because it is included in COVID-19 treatment guidelines. During this study the physicochemical properties as well as cytotoxicity, antioxidant activity and anti-diabetic activity were determined. Moreover, the effect of ascorbic acid on the digestibility of different nutrients including proteins, and fats were evaluated using INFOGEST in vitro digestion model. The structural analysis of ascorbic acid reveals that it has a monoclinic crystal structure with particle size in the nanoscale (41.496 ± 12.96 nm ). Cytotoxicity and antioxidant activity measurements proved that ascorbic acid is a powerful antioxidant with high safety profile. Moreover, it stimulates cell growth and proliferation at a dose dependent manner (12.5, 25, 50,100, and 200 mM). Ascorbic acid showed to have a low inhibition effect on alpha glucosidase enzyme, even at high concentrations (22.1% at 1800 ppm ). Digestibility measurements demonstrates that it has a positive effect on proteins and fats digestibility with a concentration dependent manner.
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Affiliation(s)
| | - Alaa Said
- faculty of science south valley university
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4
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Gutiérrez-Luna K, Ansorena D, Cruz R, Astiasarán I, Casal S. Olive and echium oil gelled emulsions: simulated effect of processing temperature, gelling agent and in vitro gastrointestinal digestion on oxidation and bioactive compounds. Food Chem 2022; 402:134416. [DOI: 10.1016/j.foodchem.2022.134416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 08/29/2022] [Accepted: 09/25/2022] [Indexed: 10/14/2022]
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Richards E, Ye SH, Ash SR, Li L. Developing a Selective Zirconium Phosphate Cation Exchanger to Adsorb Ammonium: Effect of a Gas-Permeable and Hydrophobic Coating. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8677-8685. [PMID: 35786968 DOI: 10.1021/acs.langmuir.2c01194] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A sorbent with a high enough capacity for NH4+ could serve as an oral binder to lower urea levels in end-stage kidney disease (ESKD) patients. A hydrogen-loaded cation exchanger such as zirconium phosphate Zr(HPO4)2·H2O (ZrP) is a promising candidate for this application. However, the NH4+ binding selectivity versus other ions must be improved. Here, we have developed a gas-permeable and hydrophobic surface coating on an amorphous form of ZrP using tetraethyl orthosilicate and methoxy-terminated polydimethylsiloxane. The hydrophobic coating serves as a barrier to ions in water solution from reaching the ion-exchanger's surface. Meanwhile, its gas-permeable nature allows for gaseous ammonia transfer to the cation exchanger. In vitro studies were designed to replicate the small intestine's expected ion concentrations and exposure time to the sorbent. The effectiveness of the coating was measured with NH4+ and Ca2+ solutions and uncoated ZrP as the negative control. X-ray photoelectron spectroscopy and scanning electron microscopy measurements show that the coating successfully modifies the surface of the cation exchanger─ZrP. Water contact angle studies indicate that coated ZrP is hydrophobic with an angle of (149.8 ± 2.5°). Simulated small intestine solution studies show that the coated ZrP will bind 94% (±11%) more NH4+ than uncoated ZrP in the presence of Ca2+. Meanwhile, Ca2+ binding decreases by 64% (±6%). The nearly fourfold increase in NH4+ selectivity can be attributed to the gas-permeable and hydrophobic coating applied on the ZrP surface. This work suggests a novel pathway to develop a selective cation exchanger for treating ESKD patients.
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Affiliation(s)
- Evan Richards
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Sang-Ho Ye
- McGowan Institute for Regenerative Medicine, Pittsburgh, Pennsylvania 15219, United States
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Stephen R Ash
- Nephrology Department, Indiana University Health Arnett Hospital, Lafayette, Indiana 47905, United States
- CEO, HemoCleanse Technologies, LLC, Lafayette, Indiana 47904, United States
| | - Lei Li
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Shrivastava N, Parikh A, Dewangan RP, Biswas L, Verma AK, Mittal S, Ali J, Garg S, Baboota S. Solid Self-Nano Emulsifying Nanoplatform Loaded with Tamoxifen and Resveratrol for Treatment of Breast Cancer. Pharmaceutics 2022; 14:pharmaceutics14071486. [PMID: 35890384 PMCID: PMC9318459 DOI: 10.3390/pharmaceutics14071486] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/05/2022] [Accepted: 07/14/2022] [Indexed: 02/04/2023] Open
Abstract
The solid self-nanoemulsifying drug delivery system (s-SNEDDS) is a growing platform for the delivery of drugs via oral route. In the present work, tamoxifen (TAM) was loaded in SNEDDS with resveratrol (RES), which is a potent chemotherapeutic, antioxidant, anti-inflammatory and P-gp inhibitor for enhancing bioavailability and to obtain synergistic anti-cancer effect against breast cancer. SNEDDS were developed using capmul MCM as oil, Tween 80 as surfactant and transcutol-HP as co-surfactant and optimized by central composite rotatable design. Neusilin US2 concentration was optimized for adsorption of liquid SNEDDS to prepare s-SNEDDS. The developed formulation was characterized and investigated for various in vitro and cell line comparative studies. Optimized TAM-RES-s-SNEDDS showed spherical droplets of a size less than 200 nm. In all in vitro studies, TAM-RES-s-SNEDDS showed significantly improved (p ˂ 0.05) release and permeation across the dialysis membrane and intestinal lumen. Moreover, TAM-RES-s-SNEDDS possessed significantly greater therapeutic efficacy (p < 0.05) and better internalization on the MCF-7 cell line as compared to the conventional formulation. Additionally, oral bioavailability of TAM from SNEDDS was 1.63 folds significantly higher (p < 0.05) than that of combination suspension and 4.16 folds significantly higher (p < 0.05) than TAM suspension. Thus, findings suggest that TAM- RES-s-SNEDDS can be the future delivery system that potentially delivers both drugs to cancer cells for better treatment.
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Affiliation(s)
- Nupur Shrivastava
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India; (N.S.); (S.M.); (J.A.)
| | - Ankit Parikh
- Pharmaceutical Innovation and Development (PIDG) Group, Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia;
| | - Rikeshwer Prasad Dewangan
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India;
| | - Largee Biswas
- Nano Biotech Lab, Department of Zoology, Kirori Mal College, University of Delhi, New Delhi 110007, India; (L.B.); (A.K.V.)
| | - Anita Kamra Verma
- Nano Biotech Lab, Department of Zoology, Kirori Mal College, University of Delhi, New Delhi 110007, India; (L.B.); (A.K.V.)
| | - Saurabh Mittal
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India; (N.S.); (S.M.); (J.A.)
| | - Javed Ali
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India; (N.S.); (S.M.); (J.A.)
| | - Sanjay Garg
- Pharmaceutical Innovation and Development (PIDG) Group, Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia;
- Correspondence: (S.G.); (S.B.)
| | - Sanjula Baboota
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India; (N.S.); (S.M.); (J.A.)
- Correspondence: (S.G.); (S.B.)
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7
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Melting, Crystallization, and In Vitro Digestion Properties of Fats Containing Stearoyl-Rich Triacylglycerols. Molecules 2021; 27:molecules27010191. [PMID: 35011423 PMCID: PMC8746982 DOI: 10.3390/molecules27010191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/23/2021] [Accepted: 12/25/2021] [Indexed: 11/24/2022] Open
Abstract
Fats containing the stearoyl-rich triacylglycerols (TAGs) of 1,2-distearoyl-3-oleoylglycerol (SSO) and 1,3-dioleoyl-2-stearoylglycerol (OSO) were synthesized via the lipase-catalyzed acidolysis of tristearin (SSS)-rich fat and oleic acids, followed by solvent fractionation. Their physicochemical properties and in vitro digestibilities were compared. The SSS-, SSO-, and OSO-rich fats comprised 81.6%, 52.9%, and 33.1% stearic acid, respectively, whereas oleic acid comprised 2.9%, 37.5%, and 56.2%, respectively. The SSS-, SSO-, and OSO-rich fats contained the TAGs of SaSaSa (100.00%), SaSaMo (86.98%), and MoSaMo (67.12%), respectively, and the major TAGs were SSS, SSO, and OSO, respectively. Melting and crystallization temperatures were higher and fat crystals were larger and densely packed in the descending order of SSS-, SSO and OSO-rich fats. Both in vitro multi-step digestion and pH-stat digestion were more rapid for OSO- than SSO-rich fat. Oleic acid was digested faster than stearic acid during the initial digestion, then the rate decreased, whereas that of stearic acid increased over prolonged digestion. Fats that were richer in stearoyl at the sn-1,3 position of TAG melted and crystallized at higher temperatures, had a densely packed microstructure of large fat crystals and were poorly digested. Stearic acid imparts the essential physical attributes of melting and crystallization in solid fats, and the low digestible stearoyl-rich fat would be a viable substitute for trans fatty acids in food lipid industry.
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8
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Tormási J, Abrankó L. Assessment of Fatty Acid-Specific Lipolysis by In Vitro Digestion and GC-FID. Nutrients 2021; 13:nu13113889. [PMID: 34836142 PMCID: PMC8623358 DOI: 10.3390/nu13113889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 02/03/2023] Open
Abstract
The nutritional relevance of food compositional data could be improved by taking the bioaccessibility of these constituents into account. A lack of routine methods to assess the bioaccessibility of fatty acids (FAs) in food is one of the limiting factors of doing so. An analytical protocol is proposed for routine assessment of the extent of lipolysis via in vitro digestion simulation methods in food products. The established method provides specific information on each FA individually. Steps of the protocol including the Bligh and Dyer chloroform/methanol/water extraction of esterified and free FAs from in vitro digesta, methyl ester derivatization, and GC-FID analysis were specifically tailored to help routine work and were harmonized with the Infogest in vitro digestion simulation protocol (both v1.0 and v2.0). The method was applied to assess the degree of FA-specific lipolysis in a baked fish (carp) meal and the results showed that the FA composition of the original food significantly differed from that of the distribution of FFAs in the digesta. The use of gastric lipase (in Infogest v2.0 protocol) increased total FA release by 9.5% and its specific impact on palmitic acid was the most prominent.
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9
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Importance of Conjugation of the Bile Salt on the Mechanism of Lipolysis. Molecules 2021; 26:molecules26195764. [PMID: 34641309 PMCID: PMC8510408 DOI: 10.3390/molecules26195764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/08/2021] [Accepted: 09/13/2021] [Indexed: 12/17/2022] Open
Abstract
We aim to advance the discussion on the significance of the conjugation of bile salts (BS) in our organism. We hypothesize that conjugation influences the rate of lipolysis. Since the rate of lipolysis is a compound parameter, we compare the effect of conjugation on four surface parameters, which contribute to the rate. Since deconjugation is due to gut microbiota, we hypothesize that microbiota may affect the rate of lipolysis. A meta-analysis of literature data of critical micelle concentration, β, aggregation number, and molar solubilization ratio has been performed for the first time. In addition, critical micelle concentration (CMC), interfacial tension, and lipolysis rate measurements were performed. It was found that the unconjugated BS in mixed micelles increases the antagonism between the BS, therefore, increasing the CMC. This correlated with the effect of unconjugated BS on the solubilization capacity of mixed micelles. The collected literature information indicates that the role of the BS and its conjugation in our organism is a key factor influencing the functioning of our organism, where too high levels of unconjugated BS may lead to malabsorption of fat-soluble nutrients. The experimental lipolysis results irrevocably showed that conjugation is a significant factor influencing the rate.
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10
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Morrison ED, Guo M, Maia J, Nelson D, Swaminathan S, Kandimalla KK, Lee H, Zasadzinski J, McCormick A, Marti J, Garhofer B. Dense nanolipid fluid dispersions comprising ibuprofen: Single step extrusion process and drug properties. Int J Pharm 2021; 598:120289. [PMID: 33556488 DOI: 10.1016/j.ijpharm.2021.120289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/09/2021] [Accepted: 01/17/2021] [Indexed: 01/06/2023]
Abstract
Dense nanolipid fluid (DNLF) dispersions are highly concentrated aqueous dispersions of lipid nanocarriers (LNCs) with more than 1015 lipid particles per cubic centimeter. Descriptions of dense nanolipid fluid dispersions in the scientific literature are rare, and they have not been used to encapsulate drugs. In this paper we describe the synthesis of DNLF dispersions comprising ibuprofen using a recently described twin-screw extrusion process. We report that such dispersions are stable, bind ibuprofen tightly and yet provide high transdermal drug permeation. Ibuprofen DNLF dispersions prepared according to the present study provide up to five times greater flux of the pharmacologically active S-ibuprofen isomer through human skin than a commercially available racemic ibuprofen emulsion product. We demonstrate scaling up the twin-screw extrusion method to pilot production for a stable, highly permeating ibuprofen DNLF composition based on excipients approved by the US FDA for use in topical products as a key step towards development of a commercially viable, FDA approvable topical ibuprofen medicine to treat osteoarthritis, which has never before been accomplished.
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Affiliation(s)
- Eric D Morrison
- Dynation LLC, 1000 Westgate Drive Suite 150N, Saint Paul, MN 55114, United States; Superior Nano, 1313 Fairgrounds Road Suite 150, Two Harbors, MN 55616, United States.
| | - Molin Guo
- Case Western Reserve University Department of Macromolecular Science and Engineering, 2100 Adelbert Rd., Cleveland, OH 44106, United States
| | - João Maia
- Case Western Reserve University Department of Macromolecular Science and Engineering, 2100 Adelbert Rd., Cleveland, OH 44106, United States
| | - Doug Nelson
- University of Minnesota College of Pharmacy, Department of Pharmaceutics, 308 SE Harvard St., Minneapolis, MN 55455, United States
| | - Suresh Swaminathan
- University of Minnesota College of Pharmacy, Department of Pharmaceutics, 308 SE Harvard St., Minneapolis, MN 55455, United States
| | - Karunya K Kandimalla
- University of Minnesota College of Pharmacy, Department of Pharmaceutics, 308 SE Harvard St., Minneapolis, MN 55455, United States
| | - Hanseung Lee
- University of Minnesota College of Science and Engineering Characterization Facility 312 Church St SE, Minneapolis, MN, United States
| | - Joseph Zasadzinski
- University of Minnesota College of Science and Engineering Department of Chemical Engineering and Materials Science 421 Washington Ave SE, Minneapolis, MN 55455, United States
| | - Alon McCormick
- University of Minnesota College of Science and Engineering Department of Chemical Engineering and Materials Science 421 Washington Ave SE, Minneapolis, MN 55455, United States
| | - James Marti
- University of Minnesota College of Science and Engineering Minnesota NanoCenter, 115 Union St. SE, Minneapolis, MN 55455, United States
| | - Brian Garhofer
- Superior Nano, 1313 Fairgrounds Road Suite 150, Two Harbors, MN 55616, United States
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Yan CH, Xun XM, Wang J, Wang JZ, You S, Wu FA, Wang J. An alternative solution for α-linolenic acid supplements: in vitro digestive properties of silkworm pupae oil in a pH-stat system. Food Funct 2021; 12:2428-2441. [PMID: 33624675 DOI: 10.1039/d0fo03469j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
α-Linolenic acid (ALA) is recognised to have a regulatory effect on cardiovascular diseases. Due to the low bioavailability of linseed oil (LINO), which is the most common ALA supplement, it is necessary to find a replacement for ALA supplements that is more easily accepted by the human body. The content of ALA in silkworm pupae oil (SPO) is 32.60 ± 0.67%, and SPO can be substituted as a dietary lipid to meet the demand of the human body. In the present study, a pH-stat system was used to investigate the release degree of free fatty acids (FFAs) from SPO and construct a first-order kinetic model. Digestion experiments in vitro with different lipids showed that the maximum release FFA levels were SPO > SO (soybean oil) > LO (lard oil) > MSO (mulberry seed oil) > LINO, and the first-order kinetic apparent rate constants were LINO > SPO > LO > SO > MSO. Triacylglycerol (TAG) and fatty acid composition are the decisive factors in determining the level of lipid digestion. Therefore, the maximum level of FFAs released from SPO (84.34 ± 1.37%) was much higher than that of LINO (49.78 ± 0.52%) when the hydrolysis rates were 0.2114 s-1 and 0.2249 s-1, respectively. In addition, the smaller emulsion droplet size (609.24 ± 43.46 nm) and weaker surface charge (-17.93 ± 0.42 mV) also resulted in higher levels of SPO under in vitro digestion conditions. Meanwhile, due to low melting and crystallisation temperature, SPO is quickly absorbed by the human body. Overall, SPO can be used as a new alternative for ALA supplements based on its superior digestive properties.
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Affiliation(s)
- Cheng-Hai Yan
- Jiangsu Key Laboratory of Sericutural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China.
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12
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One-step extrusion of concentrated lidocaine lipid nanocarrier (LNC) dispersions. Int J Pharm 2020; 589:119817. [PMID: 32866646 DOI: 10.1016/j.ijpharm.2020.119817] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 08/14/2020] [Accepted: 08/23/2020] [Indexed: 12/23/2022]
Abstract
Lipid nanocarriers (LNCs) have been successfully produced by many methods including high pressure homogenization, sonication and microemulsification, but it remains very difficult to produce dispersions with greater than 30% LNCs, volume average particle diameter less than 150 nm, and concentration of drugs useful for topical products. This research is the first to propose and demonstrate extrusion to manufacture highly concentrated drug containing LNC dispersions continuously and economically in a single step. By treating crude emulsions in a twin-screw extruder which has sections for homogenizing, mixing and fast-cooling inside the extruder, lidocaine-loaded LNC dispersions were successfully generated with lipid concentration up to 60% and particle diameters less than 50 nm. Electrical conductivity and birefringence measurements indicate that in the lidocaine system, lamellar microemulsions are intermediate structures and compositions with low lipid concentrations that do not present evidence of lamellar structures fail to give nanoparticles when processed. This paper also presents a new method for measuring kinetics of drug release from nanoparticles based on pH stat titration. Sufficiently precise data from pH stat titration allows determination of rate laws for release occurring on a time scale of minutes versus hours or days. The release rate of lidocaine from extruded 35% lipid nanoparticles was constant (zero order release kinetics) through the first hour (40% of drug release), a valuable property for drug delivery.
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13
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Alberdi-Cedeño J, Ibargoitia ML, Guillén MD. Study of the In Vitro Digestion of Olive Oil Enriched or Not with Antioxidant Phenolic Compounds. Relationships between Bioaccessibility of Main Components of Different Oils and Their Composition. Antioxidants (Basel) 2020; 9:antiox9060543. [PMID: 32575754 PMCID: PMC7346224 DOI: 10.3390/antiox9060543] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/11/2020] [Accepted: 06/17/2020] [Indexed: 12/13/2022] Open
Abstract
The changes provoked by in vitro digestion in the lipids of olive oil enriched or not with different phenolic compounds were studied by proton nuclear magnetic resonance (1H NMR) and solid phase microextraction followed by gas chromatography/mass spectrometry (SPME-GC/MS). These changes were compared with those provoked in the lipids of corn oil and of virgin flaxseed oil submitted to the same digestive conditions. Lipolysis and oxidation were the two reactions under consideration. The bioaccessibility of main and minor components of olive oil, of phenolic compounds added, and of compounds formed as consequence of the oxidation, if any, were matters of attention. Enrichment of olive oil with antioxidant phenolic compounds does not affect the extent of lipolysis, but reduces the oxidation degree to minimum values or avoids it almost entirely. The in vitro bioaccessibility of nutritional and bioactive compounds was greater in the olive oil digestate than in those of other oils, whereas that of compounds formed in oxidation was minimal, if any. Very close quantitative relationships were found between the composition of the oils in main components and their in vitro bioaccessibility. These relationships, some of which have predictive value, can help to design lipid diets for different nutritional purposes.
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