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Mahmoud DM, Ali MR, Aldosari BN, Zaki RM, Afzal O, Tulbah AS, Naguib DM, Zanaty MI, Attia ME, Abo El-Ela FI, Fouad AG. Functional candesartan loaded lipid nanoparticles for the control of diabetes-associated stroke: In vitro and in vivo studies. Int J Pharm X 2024; 7:100227. [PMID: 38260917 PMCID: PMC10801309 DOI: 10.1016/j.ijpx.2023.100227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/24/2024] Open
Abstract
Diabetes mellitus is a metabolic disease that raises the odds of developing stroke. Candesartan has been used to prevent stroke due to its inhibitory effects on blood pressure, angiogenesis, oxidative damage, and apoptosis. However, oral candesartan has very limited bioavailability and efficacy due to its weak solubility and slow release. The study aimed to develop a nasal formulation of candesartan-loaded liposomes containing ethanol and propylene glycol (CLEP) to improve candesartan's delivery, release, permeation, and efficacy as a potential diabetes-associated stroke treatment. Using design expert software, different CLEP formulations were prepared and evaluated in vitro to identify the optimum formulation, which. The selected optimum formulation composed of 3.3% phospholipid, 10% ethanol, and 15% propylene glycol significantly increased the release and permeation of candesartan relative to free candesartan by a factor of 1.52 and 1.47, respectively. The optimum formulation significantly reduced the infarction after stroke in rats; decreased flexion, spontaneous motor activity, and time spent in the target quadrant by 70%, 64.71%, and 92.31%, respectively, and enhanced grip strength by a ratio of 2.3. Therefore, nasal administration of the CLEP formulation could be a potential diabetes-associated stroke treatment.
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Affiliation(s)
- Dina M. Mahmoud
- Department of Pharmaceutics, Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida 44813, Sharkia, Egypt
| | - Mohammed R.A. Ali
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Basmah Nasser Aldosari
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Randa Mohammed Zaki
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Obaid Afzal
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Alaa S. Tulbah
- Department of Pharmaceutics, College of Pharmacy, Umm Al Qura University, Makkah, Saudi Arabia
| | - Demiana M. Naguib
- Department of Pharmaceutics, Faculty of Pharmacy, Nahda University (NUB), Beni-Suef, Egypt
| | - Mohamed I. Zanaty
- Biotechnology and Life Science Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Egypt
| | - Mary Eskander Attia
- Pharmacology Department, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Fatma I. Abo El-Ela
- Department of Pharmacology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Amr Gamal Fouad
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
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Son G, Seon GM, Choi SH, Yang HC. Effects of vehicles on the physical properties and biocompatibility of premixed calcium silicate cements. Dent Mater J 2024; 43:276-285. [PMID: 38447980 DOI: 10.4012/dmj.2023-147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Premixed calcium silicate cements (pCSCs) contain vehicles which endow fluidity and viscosity to CSCs. This study aimed to investigate the effects of three vehicles, namely, polyethylene glycol (PEG), propylene glycol (PG), and dimethyl sulfoxide (DMSO), on the physicochemical properties and biocompatibility of pCSCs. The setting time, solubility, expansion rate, and mechanical strength of the pCSCs were evaluated, and the formation of calcium phosphate precipitates was assessed in phosphate-buffered saline (PBS). The effects of pCSC extracts on the osteogenic differentiation of mesenchymal stem cells (MSCs) were investigated. Finally, the tissue compatibility of pCSCs in rat femurs was observed. CSC containing PEG (CSC-PEG) exhibited higher solubility and setting time, and CSC-DMSO showed the highest expansion rate and mechanical strength. All pCSCs generated calcium phosphate precipitates. The extract of CSC-PG induced the highest expressions of osteogenic markers along with the greatest calcium deposites. When implanted in rat femurs, CSC-PEG was absorbed considerably, whereas CSC-PG remained relatively unaltered inside the femur.
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Affiliation(s)
- Gitae Son
- Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University
| | - Gyeung Mi Seon
- Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University
| | - Sang Hoon Choi
- Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University
| | - Hyeong-Cheol Yang
- Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University
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Bolhari B, Noori F, Assadian H, Raee A, Ghabraei S, Shamshiri AR, Heboyan A. The effect of three additives on properties of mineral trioxide aggregate cements: a systematic review and meta-analysis of in vitro studies. BMC Oral Health 2024; 24:335. [PMID: 38486235 PMCID: PMC10941624 DOI: 10.1186/s12903-024-04103-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/05/2024] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND Several efforts have been made to improve mechanical and biological properties of calcium silicate-based cements through changes in chemical composition of the materials. This study aimed to investigate the physical (including setting time and compressive strength) and chemical (including calcium ion release, pH level) properties as well as changes in cytotoxicity of mineral trioxide aggregate (MTA) after the addition of 3 substances including CaCl2, Na2HPO4, and propylene glycol (PG). METHODS The systematic review was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Electronic searches were performed on PubMed, Embase, and Scopus databases, spanning from 1993 to October 2023 in addition to manual searches. Relevant laboratory studies were included. The quality of the included studies was assessed using modified ARRIVE criteria. Meta-analyses were performed by RevMan statistical software. RESULTS From the total of 267 studies, 24 articles were included in this review. The results of the meta-analysis indicated that addition of PG increased final setting time and Ca2+ ion release. Addition of Na2HPO4 did not change pH and cytotoxicity but reduced the final setting time. Incorporation of 5% CaCl2 reduced the setting time but did not alter the cytotoxicity of the cement. However, addition of 10% CaCl2 reduced cell viability, setting time, and compressive strength. CONCLUSION Inclusion of 2.5% wt. Na2HPO4 and 5% CaCl2 in MTA can be advisable for enhancing the physical, chemical, and cytotoxic characteristics of the admixture. Conversely, caution is advised against incorporating elevated concentrations of PG due to its retarding effect. TRIAL REGISTRATION PROSPERO registration number: CRD42021253707.
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Affiliation(s)
- Behnam Bolhari
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Faranak Noori
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Hadi Assadian
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Amir Raee
- Department of Periodontics, School of Dentistry, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Sholeh Ghabraei
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Ahmad-Reza Shamshiri
- Research Center for Caries Prevention, Dentistry Research Institute, Department of Community Oral Health, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Artak Heboyan
- Department of Prosthodontics, Faculty of Stomatology, Yeravan State Medical University After Mkhitar Heratsi, 0025, Yerevan, Armenia
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Yu HL, Goh CF. Glycols: The ubiquitous solvent for dermal formulations. Eur J Pharm Biopharm 2024; 196:114182. [PMID: 38224756 DOI: 10.1016/j.ejpb.2024.114182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/15/2023] [Accepted: 01/10/2024] [Indexed: 01/17/2024]
Abstract
Glycols stand out as one of the most commonly employed safe and effective excipients for pharmaceutical and cosmeceutical products. Their widespread adoption can be attributed to their exceptional solvency characteristics and their ability to interact effectively with skin lipids and keratin for permeation enhancement. Notably, propylene glycol enjoys significant popularity in this regard. Ongoing research endeavours have been dedicated to scrutinising the impact of glycols on dermal drug delivery and shedding light on the intricate mechanisms by which glycols enhance skin permeation. This review aims to mitigate the discordance within the existing literature, assemble a holistic understanding of the impact of glycols on the percutaneous absorption of active compounds and furnish the reader with a profound comprehension of the foundational facets pertaining to their skin permeation enhancement mechanisms, while simultaneously delving deeper into the intricacies of these processes.
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Affiliation(s)
- Hai Long Yu
- Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia
| | - Choon Fu Goh
- Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia.
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Maillet M, Kammoun M, Avril S, Ho Ba Tho MC, Trabelsi O. Non-destructive Characterization of Skeletal Muscle Extracellular Matrix Morphology by Combining Optical Coherence Tomography (OCT) Imaging with Tissue Clearing. Ann Biomed Eng 2023; 51:2323-2336. [PMID: 37310491 DOI: 10.1007/s10439-023-03274-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 06/01/2023] [Indexed: 06/14/2023]
Abstract
Histology is an essential step to visualize and analyze the microstructure of any biological tissue; however, histological processing is often irreversible, and histological samples are unable to be imaged or tested further. In this work, a novel non-destructive protocol is proposed for morphological analysis of skeletal muscles, combining Optical Coherence Tomography (OCT) imaging with Tissue Clearing. Imaging combining OCT and Propylene Glycol (PG) as a tissue-clearing agent, was performed on rat tail and extensor digitorum longus (EDL) muscle. The results show that the extracellular matrix morphology of skeletal muscles, including muscular fibers and the whole microstructure architecture were clearly identified. PG improved OCT imaging as measured by image quality metric Contrast Per Pixel CPP (increases by 3.9%), Naturalness Image Quality Evaluator NIQE (decreases by 23%), and Volume of Interest VOI size (higher for CPP and lower for NIQE values). The tendon microstructure was observed with less precision, as collagen fibers could not be clearly detected. The reversibility of the optical effects of the PG on the immersed tissue (in a Phosphate-Buffered Saline solution) was studied comparing native and rehydrated OCT image acquisition from a single EDL sample. Optical properties and microstructure visibility (CPP and NIQE) have been recovered to 99% of the native sample values. Moreover, clearing process caused shrinkage of the tissue recovered to 86% of the original width. Future work will aim to employ the proposed experimental protocol to identify the local mechanical properties of biological tissues.
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Affiliation(s)
- Maxence Maillet
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de recherche Royallieu, CS 60319, 60203, Compiègne Cedex, France
| | - Malek Kammoun
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de recherche Royallieu, CS 60319, 60203, Compiègne Cedex, France
| | - Stéphane Avril
- Mines Saint-Etienne, Univ Jean Monnet Saint-Etienne, Inserm, U 1059 Sainbiose, 42023, Saint-Etienne, France
| | - Marie-Christine Ho Ba Tho
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de recherche Royallieu, CS 60319, 60203, Compiègne Cedex, France
| | - Olfa Trabelsi
- Université de technologie de Compiègne, CNRS, Biomechanics and Bioengineering, Centre de recherche Royallieu, CS 60319, 60203, Compiègne Cedex, France.
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Bayne JE. Pregnancy Toxemia Therapeutic Options. Vet Clin North Am Food Anim Pract 2023; 39:293-305. [PMID: 37032296 DOI: 10.1016/j.cvfa.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023] Open
Abstract
This review covers the treatment options for pregnancy toxemia in small ruminants. Clinical assessment and detection of underlying metabolic and electrolyte derangements direct resuscitation efforts and provide prognostic indications. Treatment programs are dependent on producer goals and case specifics. Options include oral glucogenic precursors (eg, propylene glycol, glycerol), intravenous glucose solutions, insulin, and other supportive care measures. Induction of parturition or C-section is often carried out to minimize ongoing energy deficits, with variable survival rates. Prolonging gestation to maximize fetal viability often requires intensive care in a hospital setting and carries significant risk to both dam and offspring.
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Affiliation(s)
- Jenna E Bayne
- Department of Clinical Sciences, Auburn University College of Veterinary Medicine, 1500 Wire Road, Auburn, AL, USA.
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7
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Yoon SH, Song MK, Kim DI, Lee JK, Jung JW, Lee JW, Lee K. Comparative study of lung toxicity of E-cigarette ingredients to investigate E-cigarette or vaping product associated lung injury. J Hazard Mater 2023; 445:130454. [PMID: 37055947 DOI: 10.1016/j.jhazmat.2022.130454] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/13/2022] [Accepted: 11/19/2022] [Indexed: 06/19/2023]
Abstract
No comparative study has yet been performed on the respiratory effects of individual E-cigarette ingredients. Here, lung toxicity of individual ingredients of E-cigarette products containing nicotine or tetrahydrocannabinol was investigated. Mice were intratracheally administered propylene glycol (PG), vegetable glycerin (VG), vitamin E acetate (VEA), or nicotine individually for two weeks. Cytological and histological changes were noticed in PG- and VEA-treated mice that exhibited pathophysiological changes which were associated with symptoms seen in patients with symptoms of E-cigarette or Vaping Use-Associated Lung Injuries (EVALI) or E-cigarette users. Compared to potential human exposure situations, while the VEA exposure condition was similar to the dose equivalent of VEA content in E-cigarettes, the PG condition was about 47-137 times higher than the dose equivalent of the daily PG intake of E-cigarette users. These results reveal that VEA exposure is much more likely to cause problems related to EVALI in humans than PG. Transcriptomic analysis revealed that PG exposure was associated with fibrotic lung injury via the AKT signaling pathway and M2 macrophage polarization, and VEA exposure was associated with asthmatic airway inflammation via the mitogen-activated protein kinase signaling pathway. This study provides novel insights into the pathophysiological effects of individual ingredients of E-cigarettes.
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Affiliation(s)
- Sung-Hoon Yoon
- Inhalation Toxicology Center for Airborne Risk Factor, Korea Institute of Toxicology, 30 Baehak1-gil, Jeongeup, Jeollabuk-do 56212, Republic of Korea
| | - Mi-Kyung Song
- Inhalation Toxicology Center for Airborne Risk Factor, Korea Institute of Toxicology, 30 Baehak1-gil, Jeongeup, Jeollabuk-do 56212, Republic of Korea; Department of Human and Environmental Toxicology, University of Science & Technology, Daejeon 34113, Republic of Korea
| | - Dong Im Kim
- Inhalation Toxicology Center for Airborne Risk Factor, Korea Institute of Toxicology, 30 Baehak1-gil, Jeongeup, Jeollabuk-do 56212, Republic of Korea
| | - Jeom-Kyu Lee
- Division of Allergy and Respiratory Disease Research, Department of Chronic Disease Convergence Research, National Institute of Health, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Ji-Won Jung
- Division of Allergy and Respiratory Disease Research, Department of Chronic Disease Convergence Research, National Institute of Health, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Joong Won Lee
- Division of Allergy and Respiratory Disease Research, Department of Chronic Disease Convergence Research, National Institute of Health, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Kyuhong Lee
- Inhalation Toxicology Center for Airborne Risk Factor, Korea Institute of Toxicology, 30 Baehak1-gil, Jeongeup, Jeollabuk-do 56212, Republic of Korea; Department of Human and Environmental Toxicology, University of Science & Technology, Daejeon 34113, Republic of Korea.
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8
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Hamai N, Koide C, Tansho Y, Ooka Y, Hirano M, Fatira E, Tsudzuki M, Nakamura Y. Development of cryopreservation media for the slow-freezing of cultured primordial germ cells in chicken. J Reprod Dev 2023; 69:109-117. [PMID: 36858480 PMCID: PMC10085767 DOI: 10.1262/jrd.2022-123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
Conservation of chicken germplasm is crucial in supporting commercial breeds for sustainable egg and meat production and preserving the genetic diversity of indigenous breeds for future breeding. Cryopreservation of chicken fertilized eggs or embryos is not feasible, owing to the large yolk-laden structure of the eggs. Primordial germ cells (PGCs), the embryonic precursors of gametes, are the best candidates for the cryobanking of chicken germplasm. Effective cryobanking of chicken PGCs requires an optimal cryopreservation protocol. Cryomedia containing dimethyl sulfoxide (DMSO) or DMSO combined with serum have been widely used for the cryopreservation of chicken PGCs. However, as cryoprotectants are yet to be optimized for chicken PGCs, the efficacy of cryomedia can be further improved. Here, we investigated the cryoprotective effects of propylene glycol (PG), an alternative to DMSO, on chicken PGCs. We found that the addition of non-permeable cryoprotectants, such as trehalose or chicken serum, to DMSO or PG cryomedia improved the recovery and survival rates of post-thawed PGCs. We further investigated the cryoprotective effects of trehalose and chicken serum and found that these additives have different cryoprotective actions. Based on these findings, we designed two different cryomedia: DTS, including 5% DMSO, 0.3 M trehalose, and 1% chicken serum, and PTS, including 7.5% PG, 0.1 M trehalose, and 5% chicken serum. Among the different PGC lines and freshly isolated PGCs, the cryomedia showed similar post-thaw recovery rates. Following transplantation, post-thawed male PGCs can colonize gonads and differentiate into functional sperm. We successfully revived the offspring of Kurokashiwa, a rare chicken breed in Japan, with cryopreserved PGCs. In conclusion, we developed two different cryomedia that achieved > 50% recovery of viable PGCs after thawing while maintaining germline competency.
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Affiliation(s)
- Natsuko Hamai
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan
| | - Chihiro Koide
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan
| | - Yuki Tansho
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan
| | - Yukino Ooka
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan
| | - Mayo Hirano
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan
| | - Effrosyni Fatira
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan.,Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Unidad Asociada ULPGC-CSIC, Parque Científico Tecnológico Marino de Taliarte, 35214 Telde, Canary Islands, Spain
| | - Masaoki Tsudzuki
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan.,Japanese Avian Bioresource Project Research Center, Hiroshima University, Hiroshima 739-8528, Japan
| | - Yoshiaki Nakamura
- Laboratory of Animal Breeding and Genetics, Graduate School of Integrated Sciences for Life and Faculty of School of Applied Biological Science, Hiroshima University, Hiroshima 739-8528, Japan.,Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Unidad Asociada ULPGC-CSIC, Parque Científico Tecnológico Marino de Taliarte, 35214 Telde, Canary Islands, Spain
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9
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Jia W, Di C. Unraveling propylene glycol-induced lipolysis of the biosynthesis pathway in ultra-high temperature milk using high resolution mass spectrometry untargeted lipidomics and proteomics. Food Res Int 2023; 164:112459. [PMID: 36738011 DOI: 10.1016/j.foodres.2023.112459] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/30/2022] [Accepted: 01/02/2023] [Indexed: 01/06/2023]
Abstract
In July 2022, the food safety accident that excessive propylene glycol was detected in milk processing factory raised widespread concerns about quality and nutrition of milk with illegal additive. To the best of our knowledge, the influences of propylene glycol to lipids in milk had not been systematically explored. Therefore, spatiotemporal distributions of lipids related to propylene glycol reaction and changes of sensory quality were investigated by food exogenous. Briefly, 10 subclasses (Cer, DG, HexCer, LPC, LPE, PC, PE, PI, SPH and TG) included 147 lipids and 38 pivotal enzymes were annotated. Propylene glycol altered lysophospholipidase and phospholipase A2 through altering structural order in lipids domains surrounding proteins to inhibit glycerophospholipid metabolism and initiated obvious changes in PC (10.45-27.91 mg kg-1) and PE (12.92-49.02 mg kg-1). This study offered insights into influences of propylene glycol doses and storage time on milk metabolism at molecular level to assess the quality of milk.
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10
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Pemberton MA, Kimber I. Propylene glycol, skin sensitisation and allergic contact dermatitis: A scientific and regulatory conundrum. Regul Toxicol Pharmacol 2023; 138:105341. [PMID: 36702195 DOI: 10.1016/j.yrtph.2023.105341] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/15/2023] [Accepted: 01/21/2023] [Indexed: 01/25/2023]
Abstract
Propylene glycol (PG) has widespread use in pharmaceuticals, cosmetics, fragrances and personal care products. PG is not classified as hazardous under the Globally Harmonised System of Classification and Labelling of Chemicals (GHS) but poses an intriguing scientific and regulatory conundrum with respect to allergic contact dermatitis (ACD), the uncertainty being whether and to what extent PG has the potential to induce skin sensitisation. In this article we review the results of predictive tests for skin sensitisation with PG, and clinical evidence for ACD. Patch testing in humans points to PG having the potential to be a weak allergen under certain conditions, and an uncommon cause of ACD in subjects without underlying/pre-disposing skin conditions. In clear contrast PG is negative in predictive toxicology tests for skin sensitisation, including guinea pig and mouse models (e.g. local lymph node assay), validated in vitro test methods that measure various key events in the pathway leading to skin sensitisation, and predictive methods in humans (Human Repeat Insult Patch and Human Maximisation Tests). We here explore the possible scientific basis for this intriguing inconsistency, recognising there are arguably no known contact allergens that are universally negative in, in vitro, animal and human predictive tests methods.
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Affiliation(s)
| | - Ian Kimber
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
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11
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Inman B, Maddry JK, Ng PC, Koyfman A, Long B. High risk and low prevalence diseases: Toxic alcohol ingestion. Am J Emerg Med 2023; 67:29-36. [PMID: 36796238 DOI: 10.1016/j.ajem.2023.01.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/26/2023] [Accepted: 01/26/2023] [Indexed: 01/30/2023] Open
Abstract
INTRODUCTION Toxic alcohol ingestion is a rare but serious condition that carries with it a high rate of morbidity and mortality. OBJECTIVE This review highlights the pearls and pitfalls of toxic alcohol ingestion, including presentation, diagnosis, and management in the emergency department (ED) based on current evidence. DISCUSSION Toxic alcohols include ethylene glycol, methanol, isopropyl alcohol, propylene glycol, and diethylene glycol. These substances can be found in several settings including hospitals, hardware stores, and the household, and ingestion can be accidental or intentional. Toxic alcohol ingestion presents with various degrees of inebriation, acidemia, and end-organ damage depending on the substance. Timely diagnosis is critical to prevent irreversible organ damage or death and is based primarily on clinical history and consideration of this entity. Laboratory evidence of toxic alcohol ingestion includes worsening osmolar gap or anion-gap acidemia and end organ injury. Treatment depends on the ingestion and severity of illness but includes alcohol dehydrogenase blockade with fomepizole or ethanol and special considerations for the initiation of hemodialysis. CONCLUSIONS An understanding of toxic alcohol ingestion can assist emergency clinicians in diagnosing and managing this potentially deadly disease.
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Affiliation(s)
- Brannon Inman
- SAUSHEC, Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
| | - Joseph K Maddry
- SAUSHEC, Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
| | - Patrick C Ng
- SAUSHEC, Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
| | - Alex Koyfman
- Department of Emergency Medicine, UT Southwestern, Dallas, TX, USA
| | - Brit Long
- SAUSHEC, Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA.
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Komura M, Sato T, Yoshikawa H, Nitta NA, Suzuki Y, Koike K, Kodama Y, Seyama K, Takahashi K. Propylene glycol, a component of electronic cigarette liquid, damages epithelial cells in human small airways. Respir Res 2022; 23:216. [PMID: 35999544 DOI: 10.1186/s12931-022-02142-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 08/15/2022] [Indexed: 11/10/2022] Open
Abstract
Background Electronic cigarettes (e-cigarettes) are used worldwide as a substitute for conventional cigarettes. Although they are primarily intended to support smoking cessation, e-cigarettes have been identified as a gateway to smoking habits for young people. Multiple recent reports have described the health effects of inhaling e-cigarettes. E-cigarette liquid (e-liquid) is mainly composed of propylene glycol (PG) and glycerol (Gly), and the aerosol generated by these devices primarily contains these two components. Thus, this study aimed to evaluate the effects of PG and Gly on human small airway epithelial cells (SAECs). Methods SAECs were exposed to PG or Gly, and cell proliferation, cell viability, lactate dehydrogenase (LDH) release, DNA damage, cell cycle, and apoptosis were evaluated. Additionally, SAECs derived from chronic obstructive pulmonary disease (COPD) patients (COPD-SAECs) were investigated. Results Exposure of SAECs to PG significantly inhibited proliferation (1%, PG, p = 0.021; 2–4% PG, p < 0.0001) and decreased cell viability (1–4% PG, p < 0.0001) in a concentration-dependent manner. Gly elicited similar effects but to a reduced degree as compared to the same concentration of PG. PG also increased LDH release in a concentration-dependent manner (3% PG, p = 0.0055; 4% PG, p < 0.0001), whereas Gly did not show a significant effect on LDH release. SAECs exposed to 4% PG contained more cells that were positive for phosphorylated histone H2AX (p < 0.0001), a marker of DNA damage, and an increased proportion of cells in the G1 phase (p < 0.0001) and increased p21 expression (p = 0.0005). Moreover, caspase 3/7-activated cells and cleaved poly (ADP-ribose) polymerase 1 expression were increased in SAECs exposed to 4% PG (p = 0.0054). Furthermore, comparing COPD-SAECs to SAECs without COPD in PG exposure, cell proliferation, cell viability, DNA damage and apoptosis were significantly greater in COPD-SAECs. Conclusion PG damaged SAECs more than Gly. In addition, COPD-SAECs were more susceptible to PG than SAECs without COPD. Usage of e-cigarettes may be harmful to the respiratory system, especially in patients with COPD.
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13
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Höfler K, Littringer E, Pichler A, Scheler S. Drug-plasticizer interactions causing solid state transitions of rifaximin. Int J Pharm 2022; 625:122128. [PMID: 35995318 DOI: 10.1016/j.ijpharm.2022.122128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 08/03/2022] [Accepted: 08/16/2022] [Indexed: 11/22/2022]
Abstract
Solid phase interactions are often the reason for incompatibilities in solid dosage forms. A special situation occurs, if the incompatible compounds are able to migrate within the solid matrix. This study describes for the first time the migration of a plasticizer from the coating into the core and its interaction with the active ingredient located there. This behavior was observed in rifaximin gastro-resistant granules and resulted in the formation of solvates with altered dissolution behavior. For a detailed study, rifaximin was incubated with five plasticizers of different solubility and miscibility as well as different molecular geometry (linear vs branched), (dibutyl sebacate, tributyl citrate, triacetin, polyethylene glycol 400, and propylene glycol). The resulting solid states were analyzed by means of PXRD, supported by thermogravimetric analysis, infrared spectroscopy, and quantitative H NMR. No direct correlation could be demonstrated between the resulting type of solvate/hydrate and the affinity of rifaximin with the respective plasticizers. Interestingly all plasticizers that are able to form type I solvates/hydrates have linear structures. This common feature, which distinguishes them from the more bulky TAC and TBC, seems to be a key characteristic. Rifaximin-PG-solvate formation was not only detected after direct incubation trials, but also observed in enteric coated granules.
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14
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Thienngern P, Panichuttra A, Ratisoontorn C, Aumnate C, Matangkasombut O. Efficacy of chitosan paste as intracanal medication against Enterococcus faecalis and Candida albicans biofilm compared with calcium hydroxide in an in vitro root canal infection model. BMC Oral Health 2022; 22:354. [PMID: 35974361 PMCID: PMC9382833 DOI: 10.1186/s12903-022-02385-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 08/04/2022] [Indexed: 12/03/2022] Open
Abstract
Background Enterococcus faecalis and Candida albicans are frequently found in persistent endodontic infection and could remain in dentinal tubules despite intracanal medication with calcium hydroxide (Ca(OH)2), a commonly used medication. Thus, an effective and safe antimicrobial medication against such refractory infection is necessary in endodontic retreatment, so we aimed to test the efficacy of chitosan paste against these microorganisms compared with Ca(OH)2 in root canals of extracted human teeth. Methods Thirty-six sterilized human root samples prepared from extracted premolars and upper maxillary incisors were infected with E. faecalis for 14 days, while 32 were infected with C. albicans for 48 h, for mature biofilm formation. The samples were assigned to 6 groups of intracanal medications: Group 1: no medication (negative control); Group 2: 20% Polyethylene glycol (PEG); Group 3: 20% Propylene glycol (PG); Group 4: Ca(OH)2; Group 5: Chitosan + PEG; and Group 6: Chitosan + PG. After 7 days, intracanal surface dentin was harvested using Protaper next, resuspended, serially diluted and spread on Brain–Heart-Infusion agar (for E. faecalis) and Yeast Extract-Peptone-Dextrose agar (for C. albicans) for colony count. Antimicrobial efficacy was determined as percentage of remaining colony forming unit (CFUs) relative to negative control and analyzed using One-way ANOVA and post-hoc Games-Howell test. The significance level was set at 0.05. Results For E. faecalis, chitosan + PG had significantly higher antibacterial activity than Ca(OH)2 (P = 0.039). Chitosan + PEG and chitosan + PG medication significantly reduced viable bacteria compared with negative control, PEG and PG (P = 0.001, 0.003, 0.024, respectively for chitosan + PEG; P = 0.002, 0.003, 0.014, respectively for chitosan + PG). For C.albicans, chitosan + PEG and chitosan + PG were not significantly different from Ca(OH)2. However, Chitosan + PEG and chitosan + PG, but not Ca(OH)2, showed a significantly lower level of remaining CFUs compared with negative control (P = 0.013 and 0.005, respectively). Conclusion Chitosan paste showed better efficacy in reducing viable E. faecalis biofilm when compared to Ca(OH)2 after 7-day intracanal medication in this in vitro root canal model. It could also significantly reduce viable C. albicans, but was not significantly different from Ca(OH)2. Supplementary Information The online version contains supplementary material available at 10.1186/s12903-022-02385-x.
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Affiliation(s)
- Pasika Thienngern
- Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, 34 Henri- Dunant Road, Wangmai, Patumwan, Bangkok, 10330, Thailand
| | - Anchana Panichuttra
- Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, 34 Henri- Dunant Road, Wangmai, Patumwan, Bangkok, 10330, Thailand.
| | - Chootima Ratisoontorn
- Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, 34 Henri- Dunant Road, Wangmai, Patumwan, Bangkok, 10330, Thailand
| | - Chuanchom Aumnate
- Metallurgy and Materials Science Research Institute, Chulalongkorn University, Soi Chula 12, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
| | - Oranart Matangkasombut
- Department of Microbiology and Center of Excellence on Oral Microbiology and Immunology, Faculty of Dentistry, Chulalongkorn University, 34 Henri- Dunant Road, Wangmai, Patumwan, Bangkok, 10330, Thailand. .,Research Laboratory of Biotechnoloty, Chulabhorn Research Institute, Kampangpetch 6 Rd, Laksi, Bangkok, 10120, Thailand.
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15
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Al-Amri IS, Kadim IT, Al-Kindi AY, Khalaf SK, Al-Harrasi AS, Al-Hashmi SA, Al-Shibli AA, Al-Hadi WM, Al-Mahmuli MK, Jamshidi-Adegani F, Vakilian S, Al-Amri AI, Al-Yaqoobi SS, Al-Riyami KO. Microscopic Evaluation of Ovarian Surface Epithelium Following Treatment with Conjugated Estrogens in a Mouse Model. Asian Pac J Cancer Prev 2022; 23:1913-1920. [PMID: 35763631 PMCID: PMC9587831 DOI: 10.31557/apjcp.2022.23.6.1913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 06/18/2022] [Indexed: 06/15/2023] Open
Abstract
BACKGROUND This study was designed to evaluate the effect of different concentrations of conjugated equine estrogens (CEE) on the ovarian epithelium of female CD1 mice. METHODS Twenty-four female mice at 7 months with irregular estrus cycles were randomly divided into four groups of 6 mice each. Group one was considered as a control group and received a daily dose of 0.5ml of propylene glycol, for three weeks, while those in the treatment groups received a daily dose of 14μg/kg, 28μg/kg and 56μg/kg conjugated equine estrogens, respectively. RESULTS The results from this study showed a strong correlation between elevated concentrations of CEE and histological changes in ovarian surface epithelium (OSE). They also showed that administration of high-dose estrogen created the conditions for excessive proliferation of OSE which may progress into the development of cysts in the ovaries. CONCLUSION This study concluded that high concentrations of CEE may increase the chances of developing epithelial ovarian cancer.
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Affiliation(s)
- Issa S Al-Amri
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Isam T Kadim
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Abdulaziz Y Al-Kindi
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Samera K Khalaf
- Natural and Medical Sciences Research Center, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Ahmed S Al-Harrasi
- Natural and Medical Sciences Research Center, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Sulaiman A Al-Hashmi
- Natural and Medical Sciences Research Center, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Ahood A Al-Shibli
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Wesal M Al-Hadi
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Manal K Al-Mahmuli
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Fatemeh Jamshidi-Adegani
- Natural and Medical Sciences Research Center, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Saeid Vakilian
- Natural and Medical Sciences Research Center, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Asala I Al-Amri
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Sausan S Al-Yaqoobi
- DARIS Center for Scientific Research and Technology Development, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
| | - Khamis O Al-Riyami
- DARIS Center for Scientific Research and Technology Development, University of Nizwa, Birkat Al-Mouz, Nizwa, Sultanate of Oman.
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16
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Shen C, Zhao X, He C, Zuo Z. Developmental toxicity and neurotoxicity assessment of R-, S-, and RS- propylene glycol enantiomers in zebrafish (Danio rerio) larvae. Environ Sci Pollut Res Int 2022; 29:30537-30547. [PMID: 35000155 DOI: 10.1007/s11356-021-17538-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 11/11/2021] [Indexed: 06/14/2023]
Abstract
Propylene glycol (PG) is widely used in the foods, pharmaceuticals, oil industry, animal feed, cosmetics and other industries. Because of the existence of a chiral carbon center, PG forms R (Rectus)- and S (Sinister)-enantiomers. Currently, the toxicity study of its R-, S-enantiomers is still very scarce. In this study, we have assessed the developmental toxicity and neurotoxicity of the R-, S-, and RS-PG enantiomers in zebrafish larvae. We found that exposure to R-, S-, and RS-PG enantiomers did not significantly affect the basic developmental endpoints of embryos or larvae (i.e., embryonic movement, hatching, mortality, malformation, heartbeat, body length), indicating that R-, S-, and RS-PG exposures did not exhibit the basic developmental toxicity in zebrafish larvae. The toxicity of three enantiomers was lower than that of ethanol, and there was no significant difference between them. However, R-, S-, and RS-PG exposures with high doses could significantly change the eye diameter and locomotor activity of larval zebrafish, indicating that R-, S-, and RS-PG enantiomers of high doses could potentially exhibit the neurotoxicity and ocular developmental toxicity in zebrafish larvae. Therefore, the potential neurotoxicity and ocular developmental toxicity of R-, S-, and RS-PG enantiomers for infants and toddlers should be considered.
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Affiliation(s)
- Chao Shen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361005, Fujian, China
| | - Xijing Zhao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361005, Fujian, China
| | - Chengyong He
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361005, Fujian, China
| | - Zhenghong Zuo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, 361005, Fujian, China.
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361005, Fujian, China.
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17
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Tabosa MAM, Cordery SF, Jane White KA, Bunge AL, Guy RH, Delgado-Charro MB. Skin pharmacokinetics of diclofenac and co-delivered functional excipients. Int J Pharm 2022; 614:121469. [PMID: 35031414 DOI: 10.1016/j.ijpharm.2022.121469] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 11/16/2022]
Abstract
An important question in the development of a dermatological drug product is whether a target concentration has been achieved in, for example, the viable epidermis following topical administration. When attempting to address this challenge, it is essential to consider the role of excipients in the formulation that may influence drug partitioning and diffusion in the different layers of the skin. The objective, therefore, was to correlate, in human subjects, the skin pharmacokinetics of diclofenac (specifically, its uptake into and clearance from the stratum corneum (SC)) from an approved drug product (Voltaren® medicated plaster) with the in vivo co-uptake of two key excipients, namely propylene glycol and butylene glycol. SC sampling was used to assess diclofenac input into the skin during patch application, and its subsequent clearance post-removal of the delivery system. In parallel the uptake of the two glycol excipients was also measured. Drug and excipient amounts in the SC increased with time of application up to 6 h and, for diclofenac, no further increase was observed when the administration was prolonged to 12 h. When the plaster was removed after 6 h of wear, diclofenac cleared relatively slowly from the SC suggesting that drug binding with a slow off-rate had occurred. The results indicate that the optimisation of drug delivery from a topical formulation must take into account the disposition of key excipients and their impact on dermato-pharmacokinetics in general.
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Affiliation(s)
- M Alice Maciel Tabosa
- University of Bath, Department of Pharmacy & Pharmacology, Claverton Down, Bath BA2 7AY, UK
| | - Sarah F Cordery
- University of Bath, Department of Pharmacy & Pharmacology, Claverton Down, Bath BA2 7AY, UK
| | - K A Jane White
- University of Bath, Department of Mathematical Sciences, Claverton Down, Bath BA2 7AY, UK
| | - Annette L Bunge
- Colorado School of Mines, Department of Chemical & Biological Engineering, Golden, CO 80401, USA
| | - Richard H Guy
- University of Bath, Department of Pharmacy & Pharmacology, Claverton Down, Bath BA2 7AY, UK
| | - M Begoña Delgado-Charro
- University of Bath, Department of Pharmacy & Pharmacology, Claverton Down, Bath BA2 7AY, UK.
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18
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Zhou Y, Zhao X, Hu W, Ruan F, He C, Huang J, Zuo Z. Acute and subacute oral toxicity of propylene glycol enantiomers in mice and the underlying nephrotoxic mechanism. Environ Pollut 2021; 290:118050. [PMID: 34461418 DOI: 10.1016/j.envpol.2021.118050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 08/22/2021] [Accepted: 08/23/2021] [Indexed: 06/13/2023]
Abstract
Propylene glycol (PG; 1,2-propanediol) has been commonly used as a food additive and vehicle in pharmaceutical preparations. PG can form rectus (R-) enantiomers and sinister (S-) enantiomers. Herein, Kunming mice were used as the animal model to evaluate the acute and subacute oral toxicity of R-PG, S-PG and RS-PG (1:1 racemic mixture of R-PG and S-PG). The median lethal doses of R-PG, S-PG and RS-PG administered by oral gavage to mice were 22.81 g/kg, 26.62 g/kg and 24.92 g/kg, respectively. In the 28-day oral subacute toxicity study, the body weight, organ weights, serum biochemical, and renal histology were examined. There was no difference in subacute toxicity among R-PG, S-PG and RS-PG. The administration of 1 and 5 g/kg/day PG for 28 days caused nephrotoxicity. The kidney somatic index and levels of blood urea nitrogen exhibited a significant increase. Moreover, the activities of superoxide dismutase, catalase, and glutathione peroxidase significantly decreased after the treatment with PG. The levels of malondialdehyde, tumor necrosis factor α, interleukin 1β, and interleukin 6 significantly increased in the kidney. The results show that the nephrotoxic effects of PG are induced by oxidative stress, and the activation of the inflammatory response is mediated by the NF-κB signaling pathway. Together, these findings provide information on R-PG, S-PG and RS-PG treatments for the risk assessment of toxicity and effects on human health.
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Affiliation(s)
- Yixi Zhou
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China
| | - Xijing Zhao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China
| | - Weiping Hu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China
| | - Fengkai Ruan
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China
| | - Chengyong He
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China
| | - Jiyi Huang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China
| | - Zhenghong Zuo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, The Fifth Hospital of Xiamen, Xiang'an Branch of the First Affiliated Hospital, Xiamen University, Xiamen, Fujian, 361102, China.
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19
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Ayoub MMRR, Lethem MI, Lansley AB. The effect of ingredients commonly used in nasal and inhaled solutions on the secretion of mucus in vitro. Int J Pharm 2021; 608:121054. [PMID: 34461170 DOI: 10.1016/j.ijpharm.2021.121054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/24/2021] [Accepted: 08/25/2021] [Indexed: 10/20/2022]
Abstract
Hypersecretion of mucus is associated with impaired mucociliary clearance that can influence the retention of active pharmaceutical ingredients in the airway but is also linked with recurrent airway disease. Therefore, the effect on mucin secretion of a range of ingredients used in solutions delivered to the nose and lung was studied. Mucin secretion from explants of ovine epithelium was quantified using an enzyme-linked lectin assay (ELLA) or sandwich ELLA depending on the compatibility of the ingredients with the assay. Benzalkonium chloride (0.015% w/w), Methocel™ E50 premium LV (1.0% w/w), propylene glycol (1.5% w/w), potassium sorbate + propylene glycol (0.3% w/w + 1.5% w/w) and polysorbate 80 (0.025% w/w), used at common working concentrations, all increased the secretion of mucin from the explants (P < 0.05). Ethylenediamine tetraacetic acid-disodium salt (EDTA) (0.015% w/w), Avicel® RC591 (1.5% w/w), fluticasone furoate (0.0004% w/w, concentration in solution) and dimethyl sulfoxide (DMSO) (0.2% w/w) did not affect mucin secretion. Compounds increasing mucin secretion could alter the rate of mucociliary clearance and the mucus could provide a barrier to drug absorption. This could predispose patients to disease and affect the activity of delivered drugs, decreasing or increasing their clinical efficacy.
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Affiliation(s)
- Marwa M R R Ayoub
- Biomaterials and Drug Delivery Research and Enterprise Group, School of Applied Sciences, University of Brighton, Brighton BN2 4GJ, UK.
| | - Michael I Lethem
- Biomaterials and Drug Delivery Research and Enterprise Group, School of Applied Sciences, University of Brighton, Brighton BN2 4GJ, UK.
| | - Alison B Lansley
- Biomaterials and Drug Delivery Research and Enterprise Group, School of Applied Sciences, University of Brighton, Brighton BN2 4GJ, UK.
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Peterson J, Stadlen R, Radke J. Propylene glycol toxicity from compulsive corn starch ingestion: A case report and review. Am J Emerg Med 2021; 53:286.e1-286.e3. [PMID: 34602331 DOI: 10.1016/j.ajem.2021.09.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/09/2021] [Accepted: 09/20/2021] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION Propylene glycol (PG) is usually considered safe, however, toxicity can develop with high doses or when used for prolonged periods of time. PG can be found in some medications as well as some food products. We report a case of likely PG toxicity that occurred after compulsive daily ingestion of large amounts of corn starch. CASE REPORT Our patient initially presented to an outside hospital (OSH) via ambulance for altered mental status. Her mental status improved after her blood sugar of 25 was corrected. On admission to OSH Emergency Department her initial vital signs included a heart rate of 115 bpm, blood pressure 113/59 mm/hg, temperature 35.8C. Pertinent labs included: sodium 119 mEq/L, bicarbonate 9 mEq/L, anion gap 29 mEq/L, creatinine 2.5 mg/dL and lactic acid 20 mEq/L. On transfer to our hospital her repeat lactic acid was 20 mEq/L, osmolar gap was 20. Her PG level, which was drawn several hours after her initial presentation, was 11 mg/dL. Our patient noted that she ingested a 16 oz. package of corn starch mixed with baking soda approximately every 2 days. Given the concerns for PG she was underwent intermittent hemodialysis. PG and lactic acid levels improved, however, she ultimately died due to complications from her hospitalization. DISCUSSION PG causes toxicity through metabolism to lactic acid. While there are small amounts in food products and medications, under the right circumstances, PG can accumulate and lead to significant toxicity.
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Affiliation(s)
- J Peterson
- Wake Forest Department of Ophthalmology, 475 Vine Street, Winston-Salem, NC 27101, United States of America
| | - R Stadlen
- Pulmonary Critical Care, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, United States of America
| | - J Radke
- Department of Emergency Medicine, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, 1008 RCP, Iowa City, IA 52242, United States of America.
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Abstract
This article reviews the background, metabolism, clinical effects, and treatment of toxic alcohols, specifically ethylene glycol, methanol, diethylene glycol, propylene glycol, and isopropyl alcohol. This article also reviews the importance of an anion gap metabolic acidosis in relation to toxic alcohols and explores both the utility and the limitations of the osmole gap in patient management.
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Affiliation(s)
- Jennifer A Ross
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, PO Box 800774, Charlottesville, VA 22908-0774, USA
| | - Heather A Borek
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, PO Box 800774, Charlottesville, VA 22908-0774, USA
| | - Christopher P Holstege
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, PO Box 800774, Charlottesville, VA 22908-0774, USA.
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22
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Lee EB, Lobl M, Ford A, DeLeo V, Adler BL, Wysong A. What Is New in Occupational Allergic Contact Dermatitis in the Year of the COVID Pandemic? Curr Allergy Asthma Rep 2021; 21:26. [PMID: 33779825 PMCID: PMC8006117 DOI: 10.1007/s11882-021-01000-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/23/2021] [Indexed: 12/17/2022]
Abstract
Purpose of Review This article aims to summarize some recent trends in occupational allergic contact dermatitis (ACD), including dermatitis related to pandemic-level personal protective equipment in healthcare workers, hazards patients may experience when working from home, and occupational perspectives on the recent American Contact Dermatitis Society (ACDS) allergens of the year and ACDS Core Allergen Series updates. Recent Findings Recent ACDS Allergens of the Year may be particularly relevant to healthcare workers, including isobornyl acrylate, which is present in glucose sensors and propylene glycol present in hand cleansers and disinfectants. Lavender, limonene, and linalool, all of which are new additions to the ACDS Core Allergen Series, have been reported as causes for occupational ACD in massage therapists and aromatherapists. Isothiazolinone allergy continues to rise in both consumer and occupational settings. Finally, the COVID-19 pandemic has resulted in a wave of occupational ACD in healthcare workers to personal protective equipment, and revealed new potential allergens for individuals working from home. Summary Occupational allergic contact dermatitis continues to exert a significant occupational disease burden. Remaining aware of the current trends in allergens may allow for earlier recognition, diagnosis, and treatment, subsequently helping our patients to work in healthier and safer environments.
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Affiliation(s)
- Erica B Lee
- Department of Dermatology, University of Nebraska Medical Center, 985645 Nebraska Medical Center, Omaha, NE, 68198-5645, USA
| | - Marissa Lobl
- Department of Dermatology, University of Nebraska Medical Center, 985645 Nebraska Medical Center, Omaha, NE, 68198-5645, USA
| | - Aubree Ford
- Department of Dermatology, University of Nebraska Medical Center, 985645 Nebraska Medical Center, Omaha, NE, 68198-5645, USA
| | - Vincent DeLeo
- Department of Dermatology, Keck School of Medicine of University of Southern California, Los Angeles, CA, USA
| | - Brandon L Adler
- Department of Dermatology, Keck School of Medicine of University of Southern California, Los Angeles, CA, USA
| | - Ashley Wysong
- Department of Dermatology, University of Nebraska Medical Center, 985645 Nebraska Medical Center, Omaha, NE, 68198-5645, USA.
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Wiest F, Scherzad A, Ickrath P, Poier N, Hackenberg S, Kleinsasser N. [Studies on toxicity and inflammatory reactions induced by e-cigarettes : In vitro exposure of human nasal mucosa cells to propylene glycol at the air-liquid interface]. HNO 2021; 69:952-960. [PMID: 33586050 PMCID: PMC8613128 DOI: 10.1007/s00106-021-00998-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2020] [Indexed: 11/26/2022]
Abstract
Hintergrund Die E‑Zigarette erfreut sich in den letzten Jahren zunehmender Beliebtheit. Die Frage nach der Toxizität ist jedoch noch nicht eindeutig geklärt, und es herrscht global Unsicherheit im Umgang mit der E‑Zigarette. Ziel Ziel der vorliegenden Arbeit war es, Propylenglykol, ein Hauptbestandteil der Liquide, in Bezug auf mögliche akute Entzündungsreaktionen, zyto- und genotoxische Auswirkungen auf humane Nasenschleimhautzellen zu untersuchen. Material und Methoden Die Nasenschleimhautzellen wurden von zehn Probanden im Air-Liquid-Interface kultiviert und anschließend mit unterschiedlichen Konzentrationen des Propylenglykols bedampft. Die Analyse erfolgte mittels Trypanblau-Test, Comet-Assay, Mikrokerntest und IL-6- und IL-8-Sandwich-ELISA. Ergebnis Der Trypanblau-Test zeigte keine Reduktion der Vitalität. Im Sandwich-ELISA konnte kein Anstieg der IL-6- und IL-8-Konzentrationen nachgewiesen werden. Im Comet-Assay zeigte das Olive Tail Moment eine Schädigung im Vergleich zur Negativkontrolle in allen untersuchten Konzentrationen. Zudem zeigte sich eine dosisabhängige Schädigung. Im Mikrokerntest konnte ein Unterschied zwischen dem Reinstoff und der Negativkontrolle gefunden werden. Schlussfolgerung Es zeigten sich möglicherweise reparable DNS-Schädigungen im Comet-Assay. Im Mikrokerntest konnten diese nur in der Reinstoffkonzentration bestätigt werden. Es sollte ein restriktiver Umgang mit der E‑Zigarette erfolgen, bis insbesondere Langzeitstudien vorliegen. Zudem ist eine eindeutige Deklaration der Inhaltsstoffe der Liquide durch die Hersteller zu fordern, um weitergehende Schädigungspotenziale untersuchen zu können.
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Affiliation(s)
- F Wiest
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - A Scherzad
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - P Ickrath
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - N Poier
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Kepler Universitätsklinikum Linz, Krankenhausstraße 9, 4021, Linz, Österreich
| | - S Hackenberg
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - N Kleinsasser
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland.
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24
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van de Lagemaat M, van de Pol LA, Zonnenberg IA, Witjes BCM, Pouwels PJW. MR Spectroscopy Shows Long Propylene Glycol Half-Life in Neonatal Brain. Neonatology 2021; 118:693-701. [PMID: 34670216 DOI: 10.1159/000519282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 07/30/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Neonatal propylene glycol (PG) clearance is low with long plasma half-life. We hypothesized that neonatal brain PG clearance is diminished and may be related to perinatal asphyxia, infection, or stroke, via different blood-brain barrier permeability. This study aimed to estimate cerebral PG half-life with a clearance model including PG measured with MR spectroscopy (MRS) in neonates that received phenobarbital as the only PG source and to evaluate whether PG clearance was related to intracerebral pathology, for example, perinatal asphyxia, infection, or stroke. METHODS In this retrospective cohort study, 45 neonates receiving any dose of phenobarbital underwent MRS (short echo time single-voxel MRS at 1.5 T). Cumulative phenobarbital/PG doses were calculated. MRS indications were perinatal asphyxia (n = 22), infection (n = 4), stroke (n = 10), metabolic disease (n = 4), and others (n = 5). RESULTS Medians (interquartile range) included gestational age 39.4 (3.1) weeks, birth weight 3,146 (1,340) g, and cumulative PG dose 700 (1,120) mg/kg. First-order kinetics with mono-exponential decay showed cerebral PG half-life of 40.7 h and volume of distribution of 1.6 L/kg. Zero-order kinetics showed a rate constant of 0.048 mM/h and a volume of distribution of 2.3 L/kg, but the fit had larger residuals than the first-order model. There were no differences in ΔPG (i.e., PG estimated with clearance model minus PG observed with MRS) in infants with perinatal asphyxia, infection, or stroke. DISCUSSION/CONCLUSION This study showed a long cerebral PG half-life of 40.7 h in neonates, unrelated to perinatal asphyxia, infection, or stroke. These findings should increase awareness of possible toxic PG concentrations in neonatal brain due to intravenous PG-containing drugs.
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Affiliation(s)
- Monique van de Lagemaat
- Department of Neonatology, Emma Children's Hospital Amsterdam UMC, Amsterdam, The Netherlands
| | - Laura A van de Pol
- Department of Pediatric Neurology, Emma Children's Hospital Amsterdam UMC, Amsterdam, The Netherlands
| | - Inge A Zonnenberg
- Department of Neonatology, Emma Children's Hospital Amsterdam UMC, Amsterdam, The Netherlands.,Department of Neonatology, Wilhelmina Children's Hospital University Medical Center Utrecht, Utrecht, The Netherlands
| | - Bregje C M Witjes
- Department of Pharmacy, Erasmus MC Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Petra J W Pouwels
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, Amsterdam, The Netherlands
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25
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Zhang D, Wang W, Hou T, Pang Y, Wang C, Wu S, Wang Q. New Delivery Route of Gambogic Acid Via Skin for Topical Targeted Therapy of Cutaneous Melanoma and Reduction of Systemic Toxicity. J Pharm Sci 2020; 110:2167-2176. [PMID: 33373608 DOI: 10.1016/j.xphs.2020.12.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 12/17/2022]
Abstract
Cutaneous melanoma is the deadliest form of skin cancer, and gambogic acid (GA) exhibits potent anti-melanoma activity. However, clinical application of GA via intravenous injection and oral administration is limited by systemic toxicity and rapid metabolism in the blood. Here, we developed a new, topical route of GA delivery for anti-melanoma activity and reduction of systemic toxicity. The results indicated that the barrier of the stratum corneum (SC) and low diffusion of GA in the hydrophilic viable skin (epidermis and dermis) limited the GA penetration through intact skin. The combination of azone (AZ) and propylene glycol (PG) showed obvious synergistic effects on skin penetration by GA via improving the permeability of the SC and greatly increasing the skin accumulation of GA, thereby forming a high drug concentration in the skin and achieving a topical targeted treatment of melanoma. In addition, GA (AZ-PG) achieved the same anti-melanoma effect via topical delivery as via intravenous injection. Intravenous injection and oral administration of GA induced remarkable pathological changes in various organs in mice, whereas GA was not toxic to various organs or to the skin via topical delivery. These findings indicated that topical administration of GA is an alternative route for melanoma treatment.
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Affiliation(s)
- Ding Zhang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Wei Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Tao Hou
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Yanjun Pang
- Liaoning Institute for Drug Control, Shenyang, Liaoning 110036, China
| | - Chao Wang
- Liaoning Institute for Drug Control, Shenyang, Liaoning 110036, China
| | - Shuai Wu
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Qing Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China.
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26
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Sungpud C, Panpipat W, Sae Yoon A, Chaijan M. Ultrasonic-assisted virgin coconut oil based extraction for maximizing polyphenol recovery and bioactivities of mangosteen peels. J Food Sci Technol 2020; 57:4032-4043. [PMID: 33071325 DOI: 10.1007/s13197-020-04436-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 02/26/2020] [Accepted: 04/08/2020] [Indexed: 12/27/2022]
Abstract
Virgin coconut oil (VCO) and propylene glycol (PG) have received more attention as bio-based solvents for natural bioactive recovery in green extraction process. Here, maceration extraction and ultrasound-assisted extraction (UAE) of bioactive phenolics from mangosteen peel (MP) by VCO, PG and VCO-PG mixture were compared. The goal was to maximize the phenolic extraction and improve bioactivities. Based on a single-factor experiment for UAE with VCO, the optimal condition was sample to solvent ratio of 1:6.6 g/mL, amplitude of 55 µm, and extraction time of 7 min, which yielded total phenolic content of 365 mg GAE/100 g. Regarding the extraction methods and bio-based solvents, UAE with mixed VCO-PG was not only provided greater polyphenol yield in a shorter time, but it also enhanced the bioactivities (radical scavenging, antibacterial, and antidiabetic activities) of the extract. Therefore, UAE can be potentially used in combination with bio-based solvents, especially mixed VCO-PG, for maximizing bioactive phenolic isolation from MP. This study provided an alternative method for production of bio-based oil solution from MP which can be directly used as a functional ingredient in emulsion based food, neutraceutical and cosmetic products.
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Affiliation(s)
- Chatchai Sungpud
- Food Technology and Innovation Research Center of Excellence, Department of Agro-Industry, School of Agricultural Technology, Walailak University, Nakhon Si Thammarat, 80161 Thailand
| | - Worawan Panpipat
- Food Technology and Innovation Research Center of Excellence, Department of Agro-Industry, School of Agricultural Technology, Walailak University, Nakhon Si Thammarat, 80161 Thailand
| | - Attawadee Sae Yoon
- Drug and Cosmetics Excellence Center, School of Pharmacy, Walailak University, Nakhon Si Thammarat, 80161 Thailand
| | - Manat Chaijan
- Food Technology and Innovation Research Center of Excellence, Department of Agro-Industry, School of Agricultural Technology, Walailak University, Nakhon Si Thammarat, 80161 Thailand
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William N, Acker JP. Cryoprotectant-dependent control of intracellular ice recrystallization in hepatocytes using small molecule carbohydrate derivatives. Cryobiology 2020; 97:123-130. [PMID: 33007287 DOI: 10.1016/j.cryobiol.2020.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022]
Abstract
To promote the recovery of cells that undergo intracellular ice formation (IIF), it is imperative that the recrystallization of intracellular ice is minimized. Hepatocytes are more prone to IIF than most mammalian cells, and thus we assessed the ability of novel small molecule carbohydrate-based ice recrystallization inhibitors (IRIs) to permeate and function within hepatocytes. HepG2 monolayers were treated with N-(4-chlorophenyl)-d-gluconamide (IRI 1), N-(2-fluorophenyl)-d-gluconamide (IRI 2), or para-methoxyphenyl-β-D-glycoside (IRI 3) and fluorescent cryomicroscopy was used for real time visualization of intracellular ice recrystallization. Both IRI 2 and IRI 3 reduced rates of intracellular recrystallization, whereas IRI 1 did not. IRI 2 and IRI 3, however, demonstrated a marked reduction in efficiency in the presence of the most frequently used permeating cryoprotectants (CPAs): glycerol, propylene glycol (PG), dimethyl sulfoxide (DMSO), and ethylene glycol (EG). Nevertheless, IRI 3 reduced rates of intracellular recrystallization relative to CPA-only controls in the presence of glycerol, PG, and DMSO. Interestingly, IRI preparation in trehalose, a commonly used non-permeating CPA, did not impact the activity of IRI 3. However, trehalose did increase the activity of IRI 1 while decreasing that of IRI 2. While this study suggests that each of these compounds could prove relevant in hepatocyte cryopreservation protocols where IIF would be prominent, CPA-mediated modulation of intracellular IRI activity is apparent and warrants further investigation.
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Affiliation(s)
- Nishaka William
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, T6G 2R3, Canada.
| | - Jason P Acker
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, T6G 2R3, Canada; Centre for Innovation, Canadian Blood Services, 8249 114th Street, Edmonton, AB, T6G 2R8, Canada.
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Monahan K, Kleman A, Thapa B, Szabo A, D'Souza A, Dhakal B, Jerkins JH, Pasquini MC, Hamadani M, Hari PN, Chhabra S. Propylene Glycol-Free Melphalan versus PG-Melphalan as Conditioning for Autologous Hematopoietic Cell Transplantation for Myeloma. Biol Blood Marrow Transplant 2020; 26:2229-36. [PMID: 32920204 DOI: 10.1016/j.bbmt.2020.08.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 08/31/2020] [Accepted: 08/31/2020] [Indexed: 12/12/2022]
Abstract
High-dose melphalan (Mel) conditioning before autologous hematopoietic cell transplantation (autoHCT) is standard of care for patients with transplantation-eligible multiple myeloma. The traditional lyophilized Mel formulation has inadequate solubility and stability after reconstitution, leading to the use of propylene glycol (PG) as a solubilizing agent. A newer PG-free Mel preparation (Evomela) uses beta cyclodextrin captisol as a solubilizing agent and was approved by the United States Food and Drug Administration as a conditioning agent based on a single-phase IIb study showing bioequivalence. We compared the outcomes of consecutive patients with myeloma undergoing autoHCT using the 2 formulations of Mel for conditioning as our center switched from using the older formulation (PG-Mel) to the newer one (PGF-Mel). Of 294 autoHCT recipients, 162 received PG-Mel conditioning and 132 received PGF-Mel conditioning. The PGF-Mel group was older and had a lower average Karnofsky Performance Status score. PGF-Mel was associated with faster neutrophil recovery (median, 12 days versus 13 days; P < .001), fewer grade 3-4 infections within 30 days of autoHCT (1.5% versus 8.0%; P = .048), and a lower 30-day rehospitalization rate (6.8% versus 17.9%; P = .04), as confirmed by propensity-weighted analysis. No significant between-group differences were detected in mucositis, organ toxicity, myeloma response, or 100-day mortality.
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Porcu C, Sotgiu FD, Pasciu V, Cappai MG, Barbero-Fernández A, Gonzalez-Bulnes A, Dattena M, Gallus M, Molle G, Berlinguer F. Administration of glycerol-based formulations in sheep results in similar ovulation rate to eCG but red blood cell indices may be affected. BMC Vet Res 2020; 16:207. [PMID: 32571314 PMCID: PMC7310049 DOI: 10.1186/s12917-020-02418-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/08/2020] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The objective of this study was to investigate the metabolic and osmotic effects of different doses of glycerol or a glycerol - propylene glycol mixture in Sarda sheep with the aim to identify those able to beneficially modify ewe's metabolic status without harmful changes in red blood cell (RBC) indices. Thereafter, the selected doses were tested for their effects on ewe's ovarian activity during an induced follicular phase and compared to the effects of a hormonal treatment with equine chorionic gonadotrophin (eCG). RESULTS Glycerol was administered alone (G groups: 90% glycerol and 10% water; % v/v) or in combination with propylene glycol (M groups: 70% glycerol, 20% propylene glycol, 10% water; % v/v). Treatments were formulated to provide 100, 75, 50 and 25% of the amount of energy supplied in previous experiments. Obtained results showed that the formulations G75 and M75 (22.5 and 18.2% on DM basis, respectively) induce metabolic changes comparable to those induced by M100. The latter dose has been already evaluated for its effects on sheep metabolism and reproductive performance. However, with these high doses, plasma osmolality increased significantly, and RBC indices showed significant alterations. The low dose groups (G25 and M25, 8.6 and 6.9% on DM basis, respectively) did not show any alterations in plasma osmolality and RBC indices, but the metabolic milieu differed markedly from that of M100. Between the medium dose groups, M50 (12.9% on DM basis) showed a more comparable milieu to M100 than G50 (15.9% on DM basis) and no RBC alterations. Therefore, M75, G75 and M50 doses were tested for their effect on ovarian functions and proved to be equally effective as eCG. CONCLUSION The results of the present study evidenced an alteration of RBC indices, and possibly of their functions, as a side effect of glycerol administration at high doses in the diet of ewes. Therefore, protocols foreseeing the administration of glycerol should be tested for their effects on RBC indices and functions. In general terms, the medium dose of the glucogenic mixture (12.9% of dietary DM on offer) should be preferred.
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Affiliation(s)
- Cristian Porcu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Francesca D Sotgiu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Valeria Pasciu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Maria Grazia Cappai
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Alicia Barbero-Fernández
- Universidad Alfonso X el Sabio, Campus de Villanueva de la Cañada, Avd. Universidad 1, 28040, Madrid, Spain
| | | | - Maria Dattena
- AGRIS Sardegna, Loc. Bonassai, 07100, Sassari, Italy
| | | | | | - Fiammetta Berlinguer
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy.
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Kung CP, Zhang Y, Sil BC, Hadgraft J, Lane ME, Patel B, McCulloch R. Investigation of binary and ternary solvent systems for dermal delivery of methadone. Int J Pharm 2020; 586:119538. [PMID: 32540347 DOI: 10.1016/j.ijpharm.2020.119538] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/04/2020] [Accepted: 06/06/2020] [Indexed: 01/09/2023]
Abstract
Methadone appears to be a promising candidate for pain management. Previously, we conducted a comprehensive characterization study of methadone base and evaluated the dermal delivery of methadone from various neat solvents. Four solvents, namely d-limonene (LIM), ethyl oleate (EO), Transcutol® P (TC) and octyl salicylate (OSAL), were identified as the optimal neat solvents for skin delivery of the compound. To explore further approaches to improve methadone permeation, the present work investigated a range of binary and ternary vehicles. In vitro permeation studies in porcine skin confirmed that binary systems delivered significantly higher (p < 0.05) amounts of methadone through the skin compared with neat solvents. The highest skin permeation was observed for formulations composed of propylene glycol (PG) and TC. Nine formulations were subsequently examined in human skin. A good correlation (r2 = 0.80) for methadone permeation was obtained between porcine ear skin and human skin data. Solvent uptake studies indicated that the presence of PG not only increased methadone permeation but also TC permeation. The drug appears to "track" the permeation of TC. Future studies will expand further the range of potential vehicles for optimal delivery of the drug, that will ultimately to be investigated in clinical studies.
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Affiliation(s)
- Chin-Ping Kung
- UCL School of Pharmacy, 29-39 Brunswick Square, WC1N 1AX London, UK.
| | - Yanling Zhang
- UCL School of Pharmacy, 29-39 Brunswick Square, WC1N 1AX London, UK
| | - Bruno C Sil
- London Metropolitan University, 166-220 Holloway Road, N7 8DB London, UK
| | | | - Majella E Lane
- UCL School of Pharmacy, 29-39 Brunswick Square, WC1N 1AX London, UK
| | - Bhumik Patel
- Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH London, UK
| | - Renée McCulloch
- Great Ormond Street Hospital for Children, Great Ormond Street, WC1N 3JH London, UK
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Greene HR, Krasowski MD. Data on the relationship between acetone, ethylene glycol, isopropanol, methanol, and propylene glycol serum/plasma concentrations and osmolal gaps in patients at an academic medical center. Data Brief 2020; 29:105189. [PMID: 32055668 PMCID: PMC7005488 DOI: 10.1016/j.dib.2020.105189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/17/2020] [Accepted: 01/21/2020] [Indexed: 11/04/2022] Open
Abstract
Ingestion of toxic alcohols other than ethanol (ethylene glycol, methanol, isopropanol, and propylene glycol) can cause life-threatening complications including altered level of consciousness, respiratory depression, and organ damage from metabolites. Many hospitals lack the ability to specifically analyze these compounds using gas chromatography, gas chromatography/mass spectrometry, or by enzymatic assays for ethylene glycol. Consequently, the presence of these compounds in blood is often ascertained indirectly by laboratory testing for acid-base status, osmolal gap, and anion gap. In the related research article, we analyzed 260 samples originating from 158 unique patients that had osmolal gap and specific testing for toxic alcohols performed on serum/plasma at an academic medical center central clinical laboratory. The data in this article provide the patient demographic, osmolal gap (and associated laboratory tests needed for this calculation), ethanol concentration by enzymatic assay, specific testing for toxic alcohols (ethylene glycol, isopropanol, methanol, propylene glycol) and acetone, anion gap, clinical history, antidotal treatment, and estimated timing of ingestion. The analyzed data is provided in the supplementary tables included in this article. Bias plots of osmolal gap estimations are included in a figure. The dataset reported is related to the research article entitled "Correlation of Osmolal Gap with Measured Concentrations of Acetone, Ethylene Glycol, Isopropanol, Methanol, and Propylene Glycol in Patients at an Academic Medical Center" [1].
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Affiliation(s)
| | - Matthew D. Krasowski
- Department of Pathology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA, 52242, USA
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Pires PGDS, Bavaresco C, Leuven AFR, Gomes BCK, de Souza AK, Prato BS, Kindlein L, Andretta I. Plasticizer types affect quality and shelf life of eggs coated with rice protein. J Food Sci Technol 2020; 57:971-979. [PMID: 32123418 PMCID: PMC7026354 DOI: 10.1007/s13197-019-04130-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 10/01/2019] [Accepted: 10/05/2019] [Indexed: 11/28/2022]
Abstract
The aim of study was evaluate the effect of using rice protein coating with different plasticizers types on the quality of eggs storaged at 20 °C for 6 weeks. Three hundred eggs were coated with rice protein at 8% solution combined with glycerol, propylene glycol or sorbitol. Uncoated eggs showed the highest weight loss (5.31%), while rice protein with glycerol (4.29%) propylene glycol (4.13%) and sorbitol (4.07%) solutions were effective in preventing weight lost. Uncoated eggs had the worst HU (58.40), albumen (9.52) and yolk (7.06) pH, and YI (0.33) after 6 weeks of storage. The eggs coated of rice protein with glycerol, propylene glycol and sorbitol presented results with similar intern quality between them during all the storage period. However, the use of sorbitol as a plasticizer in the coating is more efficient in maintaining control of the increase in albumen pH. Scanning electron microscopy demonstrated a lower surface porosity in coated eggshell, indicating that the use of the coating may provide a protective barrier against the transfer of gases and moisture. In conclusion, the best egg protection results in terms of egg quality are obtained in eggs coated with rice protein and sorbitol.
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Affiliation(s)
- Paula Gabriela da Silva Pires
- Federal University of Rio Grande do Sul – UFRGS, Av. Bento Gonçalves 7712, Agronomia, Porto Alegre, RS 91540-000 Brazil
| | - Caroline Bavaresco
- Faculdade de Agronomia Eliseu Maciel, Federal University of Pelotas – UFPel, Campus Capão do Leão, Av. Eliseu Maciel, s/n°, Capão do Leão, RS 96160-000 Brazil
| | | | - Bruna Cristina Kuhn Gomes
- Federal University of Rio Grande do Sul – UFRGS, Av. Bento Gonçalves 7712, Agronomia, Porto Alegre, RS 91540-000 Brazil
| | - Aline Kummer de Souza
- Federal University of Rio Grande do Sul – UFRGS, Av. Bento Gonçalves 7712, Agronomia, Porto Alegre, RS 91540-000 Brazil
| | - Brenda Santaiana Prato
- Federal University of Rio Grande do Sul – UFRGS, Av. Bento Gonçalves 7712, Agronomia, Porto Alegre, RS 91540-000 Brazil
| | - Liris Kindlein
- Federal University of Rio Grande do Sul – UFRGS, Av. Bento Gonçalves 7712, Agronomia, Porto Alegre, RS 91540-000 Brazil
| | - Ines Andretta
- Federal University of Rio Grande do Sul – UFRGS, Av. Bento Gonçalves 7712, Agronomia, Porto Alegre, RS 91540-000 Brazil
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Lee YJ, Na CJ, Botao L, Kim KH, Son YS. Quantitative insights into major constituents contained in or released by electronic cigarettes: Propylene glycol, vegetable glycerin, and nicotine. Sci Total Environ 2020; 703:134567. [PMID: 31751827 DOI: 10.1016/j.scitotenv.2019.134567] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
Generally, the liquid used in electronic cigarettes (E-cigarettes), which is also called E-liquid, is composed of propylene glycol (PG), vegetable glycerin (VG), and nicotine, with many other miscellaneous ingredients. E-liquid is consumed mainly in the form of aerosol via inhalation by the e-cigarette user. The amount and composition of the aerosol generated during its consumption depend on various factors. In this study, the three major constituents (PG, VG, and nicotine) of E-cigarettes were analyzed in both liquid and aerosol samples from 50 commercial products. Their concentrations in the liquid (and aerosol at 3.4 V) samples were 538 (4 6 7), 482 (4 4 9), and 8.75 mg g-1 (7.91 mg g-1), respectively. The nicotine levels in the E-liquids measured in this study were normally 1.2 times greater than those specified by the manufacturers. Furthermore, the amount of liquid consumed increased proportionally as the voltage of the E- cigarette increased. The consumption rate of VG increased as the voltage of the E-cigarette increased, whereas that of PG and nicotine decreased. The results of our study confirm that the amounts of PG and VG generated through the use of E-cigarettes are noticeably larger than those from other tobacco products (such as traditional tobaccos and heat-not-burn products), although no such trend was evident in case of nicotine.
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Affiliation(s)
- Young-Jae Lee
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Republic of Korea
| | - Chae-Jin Na
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Republic of Korea
| | - Liu Botao
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Republic of Korea
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Republic of Korea.
| | - Youn-Suk Son
- Department of Environmental Engineering, Pukyong National University, 45 Yongso-ro, Busan 48513, Republic of Korea.
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Greene HR, Krasowski MD. Correlation of osmolal gap with measured concentrations of acetone, ethylene glycol, isopropanol, methanol, and propylene glycol in patients at an academic medical center. Toxicol Rep 2019; 7:81-88. [PMID: 31908969 PMCID: PMC6939068 DOI: 10.1016/j.toxrep.2019.12.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 12/12/2019] [Accepted: 12/14/2019] [Indexed: 11/13/2022] Open
Abstract
The ingestion of toxic alcohols including methanol, ethylene glycol, and isopropanol remains a significant public health problem. These compounds can cause central nervous system depression and, for methanol and ethylene glycol, organ damage from toxic metabolites. The presence of these compounds in serum/plasma can often be determined and monitored by measuring the osmolal gap (OG). However, other compounds originating from endogenous or exogenous sources, such as propylene glycol and acetone, can also increase the OG. Conversion factors can be used to estimate specific concentrations of acetone and toxic alcohols from OG. In this retrospective study, data were analyzed for 260 samples originating from 158 unique patients that had determination of both OG and concentrations for toxic alcohols at an academic medical center central laboratory. Specific analysis included gas chromatography (acetone, isopropanol, methanol, ethylene glycol, propylene glycol) and/or enzymatic assay (ethylene glycol). Many samples also contained ethanol. The data was grouped by type of ingestion. The present study analyzed the relationship between the OG calculated from measured plasma/serum osmolality and the OG estimated by applying conversion factors to measured concentrations of the different compounds. The correlations tend to be linear and vary by compound, with methanol and ethylene glycol having the highest R2 values of 0.93 and 0.95, respectively, consistent with other published studies. Higher variability was seen for the data for isopropanol and acetone. For each of the data subsets, the estimated toxic alcohol concentration calculated using conversion factors from OG tends to overestimate the actual concentration of the compound. Overall, the present study demonstrates the generally linear relationship between OG determined by osmolality and the OG estimated using measured concentrations of acetone and toxic alcohols.
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Affiliation(s)
| | - Matthew D. Krasowski
- Department of Pathology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA, 52242, USA
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Chalmeh A, Pourjafar M, Badiei K, Jalali M, Sebdani MM. The comparative effects of dietary monensin and propylene glycol on insulin resistance of transition dairy cows. Trop Anim Health Prod 2020; 52:1573-82. [PMID: 31823108 DOI: 10.1007/s11250-019-02160-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 11/19/2019] [Indexed: 01/18/2023]
Abstract
During the transition period, dairy cows suffer from negative energy balance due to the upcoming insulin resistance as a major metabolic disturbance. We hypothesized that providing glucose precursors for transition dairy cows may reduce the insulin resistance. In this study, 24 multiparous Holstein dairy cows were enrolled 8 weeks prior to parturition and divided into 4 equal groups, including control (Ctrl), monensin (Mo), propylene glycol (PPG), and monensin plus propylene glycol (Mo + PPG). Cows from the Mo and PPG groups received 1 mg/kg body weight (BW) of monensin, daily. Cows from the PGG group received 150 g of propylene glycol, daily. Cows from the Mo + PPG group received 1 mg/kg BW of monensin and 150 g/head of propylene glycol daily and Ctrl cows received basal diet without any supplementations. Intravenous glucose tolerance test (ivGTT) was conducted weekly from 3 weeks before to 3 weeks after parturition to evaluate the insulin resistance phenomenon. Immediately after glucose administration, glucose and insulin increased significantly, and their alterations were significant during the study. Glucose and insulin were significantly higher in the Ctrl group than in the other groups, and their levels in different pre- and post-partum periods were significantly lower in the Mo + PPG group than in the other studied groups. The results of this study represented that the supplementary feeding with propionate precursors, such as monensin and propylene glycol, reduced the insulin resistance in dairy cows during the transition period. This effect is more explicit by propylene glycol than by monensin, and the combination of both reduces insulin resistance at higher rates. The use of these dietary supplements is likely to produce more propionates as the main precursor of glucose; therefore, it reduces the negative energy balance and subsequently decreases the insulin resistance. In this regard, to reduce insulin resistance, it is recommended that dairy cows during the transition period be fed with monensin and propylene glycol supplements.
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Carrer V, Alonso C, Pont M, Zanuy M, Córdoba M, Espinosa S, Barba C, Oliver MA, Martí M, Coderch L. Effect of propylene glycol on the skin penetration of drugs. Arch Dermatol Res 2019; 312:337-352. [PMID: 31786711 DOI: 10.1007/s00403-019-02017-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 10/31/2019] [Accepted: 11/20/2019] [Indexed: 12/12/2022]
Abstract
Propylene glycol (PG) has been used in formulations as a co-solvent and/or to enhance drug permeation through the skin from topical preparations. Two skin in vitro permeation approaches are used to determine the effect of PG on drug penetration. The in vitro Skin-PAMPA was performed using 24 actives applied in aqueous buffer or PG. PG modulates permeability by increasing or diminishing it in the compounds with poor or high permeability, respectively. Percutaneous absorption using pigskin on Franz diffusion cells was performed on seven actives and their commercial formulations. The commercial formulations evaluated tend to have a lower permeability than their corresponding PG solutions but maintain the compound distribution in the different strata: stratum corneum, epidermis and dermis. The results indicate the enhancer properties of PG for all compounds, especially for the hydrophilic ones. Additionally, the Synchrotron-Based Fourier Transform Infrared microspectroscopy technique is applied to study the penetration of PG and the molecular changes that the vehicle may promote in the different skin layers. Results showed an increase of the areas under the curve indicating the higher amount of lipids in the deeper layers and altering the lipidic order of the bilayer structure to a more disordered lipid structure.
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Affiliation(s)
- Victor Carrer
- Institute of Advanced Chemistry of Catalonia-CSIC (IQAC-CSIC), Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Cristina Alonso
- Institute of Advanced Chemistry of Catalonia-CSIC (IQAC-CSIC), Jordi Girona 18-26, 08034, Barcelona, Spain.
| | - Mercè Pont
- Almirall R&D Center, Ctra. Laureà Miró 408-410, 08980, Sant Feliu de Llobregat, Barcelona, Spain
| | - Miriam Zanuy
- Almirall R&D Center, Ctra. Laureà Miró 408-410, 08980, Sant Feliu de Llobregat, Barcelona, Spain
| | - Mònica Córdoba
- Almirall R&D Center, Ctra. Laureà Miró 408-410, 08980, Sant Feliu de Llobregat, Barcelona, Spain
| | - Sonia Espinosa
- Almirall R&D Center, Ctra. Laureà Miró 408-410, 08980, Sant Feliu de Llobregat, Barcelona, Spain
| | - Clara Barba
- Institute of Advanced Chemistry of Catalonia-CSIC (IQAC-CSIC), Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Marc A Oliver
- Institute of Advanced Chemistry of Catalonia-CSIC (IQAC-CSIC), Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Meritxell Martí
- Institute of Advanced Chemistry of Catalonia-CSIC (IQAC-CSIC), Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Luisa Coderch
- Institute of Advanced Chemistry of Catalonia-CSIC (IQAC-CSIC), Jordi Girona 18-26, 08034, Barcelona, Spain
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Jafri I, Shoaib MH, Yousuf RI, Ali FR. Effect of permeation enhancers on in vitro release and transdermal delivery of lamotrigine from Eudragit ®RS100 polymer matrix-type drug in adhesive patches. Prog Biomater 2019; 8:91-100. [PMID: 31069700 PMCID: PMC6556165 DOI: 10.1007/s40204-019-0114-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 04/29/2019] [Indexed: 11/30/2022] Open
Abstract
The drug-in-adhesive (DIA)-type matrix patches of lamotrigine are developed using variable permeation enhancers (oleic acid, PG, lemon oil and aloe vera), and drug in vitro release and its permeation are evaluated. Lamotrigine has been long used as an anti-epileptic, mood stabilizer, to treat bipolar disorder in adults and off label as an antidepressant. lamotrigine matrix patches comprising of Eudragit®RS100 (rate-controlling polymer) and DuroTak® 387-2510 (adhesive) were prepared by pouring the solution on backing membrane (3M-9720). The thickness of 120 µm was adjusted through micrometer film applicator. USP Apparatus V was used for the evaluation of release profile, which was fitted into various mathematical models. Quality characteristics of patches were determined through weight variation, moisture content, moisture uptake and drug content evaluation. FTIR studies were performed for drug-excipient compatibility; Franz diffusion cell was employed for studying in vitro permeation parameters such as flux, lag time, and ER. Skin sensitivity study of optimized patch was also performed. The release from patches comprising of PG and oleic acid was maximum, i.e., 96.24 ± 1.15% and 91.12 ± 1.11%, respectively. Formulations (A1-A5) exhibited Makoid-Banakar release profile. Formulation A3 consisting of oleic acid was optimized due to enhanced permeation of drug across skin compared to other enhancers with enhancement ratio of 3.55. Skin sensitivity study revealed patch as safe and non-allergenic. The study demonstrates that oleic acid can be used as a suitable permeation enhancer for transdermal delivery of lamotrigine from matrix-type patches.
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Affiliation(s)
- Ifrah Jafri
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, Pakistan
| | - Muhammad Harris Shoaib
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, Pakistan.
| | - Rabia Ismail Yousuf
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, Pakistan
| | - Fatima Ramzan Ali
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, Pakistan
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Belkoniene M, Socquet J, Njemba-Freiburghaus D, Pellaton C. Near fatal intoxication by nicotine and propylene glycol injection: a case report of an e-liquid poisoning. BMC Pharmacol Toxicol 2019; 20:28. [PMID: 31077262 DOI: 10.1186/s40360-019-0296-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 03/31/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Concern about intoxication by e-liquid is growing as calls to poison control centers have increased since their introduction. Only three cases of intoxication by injection have been reported worldwide. Our case is unique because of the precise follow-up of a patient who survived a lethal dose of self-injected e-liquid, without other co-intoxication. CASE PRESENTATION A 51-year-old male presented to the Emergency Department after injecting himself intravenously (IV) in the forearm with 10 mL of e-liquid (1000 mg of nicotine diluted in propylene glycol). An agitation phase was followed by coma and bradypnoea requiring mechanical ventilation. The patient developed a transitory neurological impairment with the appearance of tetraparesis, gaze palsy and myoclonus due to nicotinic syndrome. The arterial blood gas (ABG) analysis confirmed uncompensated lactic acidosis with an elevated anion gap, which is an expected effect of propylene glycol. The toxicology screen indicated the presence of nicotine and cotinine in the blood and excluded the presence of concomitant intoxication. The patient recovered without sequelae. CONCLUSION Even a small quantity of intravenous (IV) e-liquid can lead to an acute intoxication and fatal outcomes due to the toxic effects of nicotine. This case might help emergency doctors cope with acute intoxication by injection of e-liquid and increase their comprehension of the two main substances, nicotine and propylene glycol with overview of their pharmacodynamics and kinetic effects.
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Park J, Lee H, Park K. Mixture Toxicity of Methylisothiazolinone and Propylene Glycol at a Maximum Concentration for Personal Care Products. Toxicol Res 2018; 34:355-361. [PMID: 30370010 PMCID: PMC6195885 DOI: 10.5487/tr.2018.34.4.355] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/15/2018] [Accepted: 07/04/2018] [Indexed: 11/20/2022] Open
Abstract
Methylisothiazolinone (MIT) has been used in combination with methylchloroisothiazolinone (CMIT) for cosmetic products such as shampoo, body lotion, and skin care products. The mixture of CMIT/MIT has been found to cause allergic contact dermatitis and is thus no longer permitted for use as a preservative in leave-on cosmetics. However, MIT itself was approved as a stand-alone preservative at a maximum concentration of 100 ppm as the toxicity was derived from CMIT rather than MIT. However, in many countries, allergic skin irritation caused by MIT remains a social concern. In this study, skin irritation was assessed for the presence of MIT, propylene glycol, and their mixture using a 3D human skin model EpiDerm™. Although non-diluted MIT causes serious skin toxicity, skin irritation was not observed at a concentration of 100 ppm, the maximum permissible level for cosmetics and personal care products according to European regulations. Propylene glycol, the most widely used vehicle for MIT, did not cause skin irritation in the 3D skin model. The results are expected to provide information for regulatory policies and guidelines on the use of biocides in consumer products.
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Affiliation(s)
- Juyoung Park
- College of Pharmacy, Dongduk Women's University, Seoul, Korea
| | - Handule Lee
- College of Pharmacy, Dongduk Women's University, Seoul, Korea
| | - Kwangsik Park
- College of Pharmacy, Dongduk Women's University, Seoul, Korea
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Srikuea R, Suhatcho K. Impact of intramuscular administration of lipid-soluble and water-soluble vehicles into regenerating muscle at the distinct phases of skeletal muscle regeneration. J Physiol Sci 2018; 68:647-661. [PMID: 29134575 PMCID: PMC10717534 DOI: 10.1007/s12576-017-0576-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/28/2017] [Indexed: 12/30/2022]
Abstract
Interpretation on the effectiveness of potential substances to enhance skeletal muscle regeneration is difficult if an inappropriate vehicle is administered, since vehicle administration can directly enhance or suppress regenerative capacity. In the current study, intramuscular administration of lipid-soluble and water-soluble vehicles into regenerating muscle at the distinct phases of skeletal muscle regeneration (regenerative vs. remodeling) were investigated. Tested vehicles included lipid-soluble [olive oil, (0.1, 1, 5, and 40%) dimethyl sulfoxide (DMSO), and 40% propylene glycol (PG)] and water-soluble [0.9% NaCl, PBS, 0.1% ethanol, and distilled water]. Skeletal muscle regeneration was induced by 1.2% BaCl2 injection to the tibialis anterior muscle of 10-week-old C57BL/6 male mice. Histological features, skeletal muscle stem cell activity, regenerating muscle fiber formation, angiogenesis, extracellular matrix remodeling, and macrophage infiltration were examined. The results revealed repeated administration of 40% DMSO and 40% PG causes significant recurrent muscle injury, which is pronounced during the remodeling phase compared to the regenerative phase. These findings were supported by (1) massive infiltration of F4/80+ macrophages; (2) significant increase of skeletal muscle stem cell re-activation and nascent regenerating muscle fiber formation; (3) excess fibrous formation; and (4) decreased regenerating muscle fiber cross-sectional area. These deleterious effects were comparable to 2% trypsin (degenerative substance) administration and less pronounced with a single administration. Nevertheless, recurrent muscle injury was still presented with 5% DMSO administration but it can be alleviated when 0.1% DMSO was administered during the remodeling phase. In contrast, none of the tested vehicles enhanced regenerative capacity compared with IGF-1 administration. Altogether, intramuscular administration of vehicle containing high concentration of DMSO or PG could impair skeletal muscle regenerative capacity and potentially affect validation of the investigational substance.
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Affiliation(s)
- Ratchakrit Srikuea
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
| | - Kanokwan Suhatcho
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
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Harvanko AM, McCubbin AK, Ashford KB, Kelly TH. Electronic cigarette liquid and device parameters and aerosol characteristics: A survey of regular users. Addict Behav 2018; 84:201-206. [PMID: 29723803 PMCID: PMC6580851 DOI: 10.1016/j.addbeh.2018.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 03/06/2018] [Accepted: 04/10/2018] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Electronic cigarettes are widely variable devices, typically with user definable liquid and device parameters. Yet, little is known about how regular users manipulate these parameters. There is also limited understanding of what factors drive electronic cigarette use and liquid purchasing, and whether two common ingredients, propylene glycol and vegetable glycerin, alter the subjective effects of these devices. METHODS During the spring of 2016 522 adults, who reported daily use of electronic cigarettes containing nicotine, completed a survey on electronic cigarettes. Survey questions included an electronic cigarette dependence questionnaire, questions on tobacco and electronic cigarette use, and device and liquid preferences. RESULTS Fifty-nine percent of respondents reported using another tobacco product, which was positively associated with level of nicotine dependence. On average, devices were set to 28.3 (SD = 24.2) watts. Ability to change device voltage, and level of resistance typically used, was significantly associated with level of nicotine dependence. Amount of liquid consumed, nicotine concentration, and milligrams of nicotine used per week, were positively associated with nicotine dependence. Participants rated 'good taste' as the most important consideration when using and purchasing liquids, and propylene glycol is associated with undesirable effects and vegetable glycerin with desirable effects. CONCLUSIONS These data indicate that electronic cigarette users utilize a wide range device parameter settings and liquid variables, and that individuals with greater nicotine dependence favor voltage control devices, and lower resistance heating elements. Taste is a key factor for electronic cigarette selection, and concentrations of propylene glycol and vegetable glycerin may have a significant impact on the reinforcing effects of liquids.
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Affiliation(s)
- Arit M Harvanko
- Department of Behavioral Science, Department of Psychology, Kastle Hall, 173 Funkhouser Dr, Lexington, KY 40506-0044, United States.
| | - Andrea K McCubbin
- University of Kentucky College of Nursing, 509C College of Nursing Building, Lexington 40536-0232, United States
| | - Kristin B Ashford
- University of Kentucky College of Nursing, 417 College of Nursing Building, Lexington 40536-0232, United States
| | - Thomas H Kelly
- Department of Behavioral Science, Department of Psychology, University of Kentucky College of Nursing, Department of Psychiatry, Medical Behavioral Science Building, Lexington, KY 40536-0086, United States
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Ingvadottir EM, Scully SM, Orlygsson J. Production of (S)-1,2-propanediol from l-rhamnose using the moderately thermophilic Clostridium strain AK1. Anaerobe 2018; 54:26-30. [PMID: 30009943 DOI: 10.1016/j.anaerobe.2018.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/09/2018] [Accepted: 07/09/2018] [Indexed: 10/28/2022]
Abstract
Clostridium strain AK1 was investigated for its capacity of producing 1,2-propanediol from l-rhamnose but not l-fucose. The maximum yields of 1,2-propanediol from rhamnose was 0.81 mol 1,2-PD/mol l-rhamnose. The influence of different initial substrate concentrations as well as the effect of temperature and pH on 1,2-PD production was investigated.
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Affiliation(s)
- Eva Maria Ingvadottir
- University of Akureyri, Faculty of Natural Resource Sciences, Borgir 2 v/ Norðurslóð, 600, Akureyri, Iceland
| | - Sean M Scully
- University of Akureyri, Faculty of Natural Resource Sciences, Borgir 2 v/ Norðurslóð, 600, Akureyri, Iceland
| | - Johann Orlygsson
- University of Akureyri, Faculty of Natural Resource Sciences, Borgir 2 v/ Norðurslóð, 600, Akureyri, Iceland.
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Osei-Bempong C, Ghareeb AE, Lako M, Figueiredo FC, Armitage WJ. Defining the optimal cryoprotectant and concentration for cryopreservation of limbal stem cells. Cryobiology 2018; 84:98-102. [PMID: 30075110 PMCID: PMC6167250 DOI: 10.1016/j.cryobiol.2018.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/29/2018] [Accepted: 07/30/2018] [Indexed: 12/14/2022]
Abstract
Limbal stem cell (LSC) deficiency causes progressive loss of vision but may be treated by transplant of autologous LSCs. Cryopreservation has the potential to indefinitely extend the lifespan of LSCs allowing re-transplant in case of graft failure. In this study, we aimed to identify the optimal cryoprotectant and cryoprotectant concentration for LSC cultures. Suspension cultures derived from cadaveric corneoscleral rims were cooled to 4 °C with Me2SO, propylene glycol or ethylene glycol at a concentration of 5%, 10% or 15%. Cell tolerance was measured in terms of membrane integrity, colony-forming efficiency and alamarBlue® reduction. Increasing cryoprotectant concentration above 5% reduced membrane integrity, metabolism and colony-forming efficiency. Cryoprotectant choice did not significantly influence these characteristics. Cells demonstrating Side Population were maintained after cryopreservation with 5% propylene glycol in vapour phase liquid nitrogen for 1 week, indicating that cryopreservation of LSCs with relatively low cryoprotectant concentration (5%) has promise in low-temperature eye banking.
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Affiliation(s)
- Charles Osei-Bempong
- Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Ali E Ghareeb
- Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK.
| | - Majlinda Lako
- Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Francisco C Figueiredo
- Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK; Department of Ophthalmology, Royal Victoria Infirmary, Newcastle University, Newcastle upon Tyne, UK
| | - W John Armitage
- Division of Ophthalmology, University of Bristol, Bristol Eye Hospital, Lower Maudlin Street, Bristol BS1 2LX, UK
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Kianvash N, Bahador A, Pourhajibagher M, Ghafari H, Nikoui V, Rezayat SM, Dehpour AR, Partoazar A. Evaluation of propylene glycol nanoliposomes containing curcumin on burn wound model in rat: biocompatibility, wound healing, and anti-bacterial effects. Drug Deliv Transl Res 2018; 7:654-663. [PMID: 28707264 DOI: 10.1007/s13346-017-0405-4] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Curcumin is an effective wound healing agent in burn therapy, but due to its low bioavailability, it is required to be formulated for topical therapy. Liposomal nanocarriers are developed as stable and efficient dermal delivery systems. In this study, we prepared curcumin-propylene glycol liposomes (Cur-PgL) to treat animals subjected to second degree burns. The characterization tests confirmed the production of monodisperse nanoliposomes of average size of about 145 nm with high entrapment efficiency percentage and a sustained release behavior. TEM analysis of nanocarriers showed no aggregation in long time storage up to 60 days. The biocompatibility of the Cur-PgL formulation was evaluated by ISO standards. We found that Cur-PgL 0.3% was the effective dose in injured rats without any side effects on intact skin. The cytotoxicity of the Cur-PgL 0.3% nanovesicles was also assessed on human dermal fibroblast (HDF) cells. The results showed no detectable cytotoxicity, but considerable cytotoxicity was observed in higher concentration of 1.5 and 3 mg/ml of free and PgL forms of curcumin. Eight days of application of Cur-PgL on burned rats resulted in a significant (P<0.001) recovery of wound repair parameters, and after 18 days, wound contraction occurred significantly (P < 0.001) compared to the other groups. The antibacterial activity of the Cur-PgL formulation was found to be similar to the silver sulfadiazine (SSD) cream 1% regarding the inhibition of the bacterial growth. In conclusion, the low dose of curcumin nanoliposomal formulation efficiently improved injuries and infections of burn wounds and it can be considered in burn therapy.
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Affiliation(s)
- Nooshin Kianvash
- Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Abbas Bahador
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Keshavarz Blvd, 100 Poursina Ave., Tehran, Iran
| | - Maryam Pourhajibagher
- Department of Microbiology, School of Medicine, Dental Implant Research Center, Dentistry Research Institute, Laser Research Center of Dentistry (LRCD), Tehran University of Medical Sciences, Tehran, Iran
| | - Homanaz Ghafari
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Vahid Nikoui
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Sayed Mehdi Rezayat
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Reza Dehpour
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Partoazar
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran.
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Spindle TR, Talih S, Hiler MM, Karaoghlanian N, Halquist MS, Breland AB, Shihadeh A, Eissenberg T. Effects of electronic cigarette liquid solvents propylene glycol and vegetable glycerin on user nicotine delivery, heart rate, subjective effects, and puff topography. Drug Alcohol Depend 2018; 188:193-199. [PMID: 29778773 PMCID: PMC7193252 DOI: 10.1016/j.drugalcdep.2018.03.042] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/18/2018] [Accepted: 03/23/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND Electronic cigarettes (ECIGs) are a class of tobacco products that produce different effects (e.g., nicotine delivery), depending on the device, liquid, and behavioral factors. However, the influence of the two primary ECIG liquid solvents, propylene glycol (PG) and vegetable glycerin (VG), on ECIG acute effects is unknown. METHODS Thirty ECIG-experienced, ≥12-h nicotine- abstinent participants completed four conditions consisting of two ECIG-use bouts (10 puffs, 30 s interpuff-interval) differing only by liquid PG:VG ratio (2PG:98VG, 20PG:80VG, 55PG:45VG, 100PG). Device power (7.3 W) and liquid nicotine concentration (18 mg/ml) remained constant. Nicotine delivery, subjective effects, heart rate (HR), and puff topography were assessed. RESULTS In the 100PG condition, participants took shorter and smaller puffs but obtained significantly more nicotine relative to the two VG-based conditions. Total nicotine exposure (i.e., area under the curve) was also significantly higher during use of the two PG-based liquids. However, participants reported that the 100 PG liquid was significantly less "pleasant" and "satisfying" relative to the other liquids (all ps < .05). Increases in HR and decreases in abstinence symptoms (e.g., "craving") did not differ across conditions. CONCLUSIONS PG:VG ratio influenced nicotine delivery, some subjective effects, and puff topography. Lower overall product satisfaction associated with the 100PG liquid suggests factors other than nicotine delivery (e.g., aerosol visibility) may play a role in maintaining ECIG use. Regulating ECIG acute effects such as nicotine delivery and subjective effects may require simultaneous attention to liquid PG:VG ratio as well as device, liquid, and behavioral factors known to influence these outcomes.
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Affiliation(s)
- Tory R Spindle
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States
| | - Soha Talih
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States; Department of Mechanical Engineering, American University of Beirut, Beirut, Lebanon
| | - Marzena M Hiler
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States
| | - Nareg Karaoghlanian
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States; Department of Mechanical Engineering, American University of Beirut, Beirut, Lebanon
| | - Matthew S Halquist
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, VA, United States
| | - Alison B Breland
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States
| | - Alan Shihadeh
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States; Department of Mechanical Engineering, American University of Beirut, Beirut, Lebanon
| | - Thomas Eissenberg
- Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, United States.
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46
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Duell AK, Pankow JF, Gillette SM, Peyton DH. Boiling points of the propylene glycol + glycerol system at 1 atmosphere pressure: 188.6-292 °C without and with added water or nicotine. CHEM ENG COMMUN 2018; 205:1691-1700. [PMID: 30778269 DOI: 10.1080/00986445.2018.1468758] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
In electronic cigarettes ("electronic nicotine delivery systems", ENDS), mixtures of propylene glycol (PG) and/or glycerol (GL; aka "vegetable glycerin", VG) with nicotine are vaporized to create a nicotine-containing aerosol. For a given composition, the temperature required to boil the liquid at 1 atmosphere must be at least somewhat greater than the boiling point (BP). The use of ENDS is increasing rapidly worldwide, yet the BP characteristics of the PG + GL system have been characterized as the mixtures; here we re-do this, but significantly, also study the effects of added water and nicotine. BP values at 1 atmosphere pressure were measured over the full binary composition range. Fits based on the Gibbs-Konovalov theorem provide BP as a function of composition (by mole-percent, by weight-percent, and by volume-percent). BPs of PG + GL mixtures were then tested in the presence of additives such as water (2.5 and 5 mol% added) and nicotine (3 mol%). Water was found to decrease the BP of PG + GL mixtures significantly at all compositions tested, and nicotine was found to decrease the BP of PG + GL mixtures containing ~75 GL: 25 PG (by moles) or more. The effect of added water (5, 10, and 15 mol% added) on electronic cigarette degradation production (some aldehydes and formaldehyde hemiacetals) was examined and found to have no significant impact on solvent (PG or GL) degradation for the particular device used.
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Affiliation(s)
- Anna K Duell
- Department of Chemistry, Portland State University, Portland, OR, USA
| | - James F Pankow
- Department of Chemistry, Portland State University, Portland, OR, USA.,Department of Civil and Environmental Engineering, Portland State University, Portland, OR, USA
| | | | - David H Peyton
- Department of Chemistry, Portland State University, Portland, OR, USA
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47
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Dalton P, Soreth B, Maute C, Novaleski C, Banton M. Lack of respiratory and ocular effects following acute propylene glycol exposure in healthy humans. Inhal Toxicol 2018; 30:124-132. [PMID: 29764241 DOI: 10.1080/08958378.2018.1470207] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
OBJECTIVE Propylene glycol (PG) is a widely used solvent, chemical intermediate and carrier substance for foods, pharmaceutical and cosmetic products. Professional and occupational exposure to PG aerosol and vapor may occur from theatrical smoke generators and during application of deicing products to airplanes. While PG is considered to have low toxicity, the results of one study suggested that brief (1-min) exposure to PG mist elicited ocular and respiratory effects in humans. Because the high concentrations and brief exposure duration in that study were not representative of most occupational exposures, a controlled experimental exposure study was conducted to clarify or confirm the earlier findings. MATERIALS AND METHODS Ten males and 10 females were exposed to PG aerosol for 4 hrs at 20 and 100 mg/m3 and 30 min at 200 mg/m3. Total PG exposure concentrations (droplets plus gas phase) were 95.6, 442.4 and 871 mg/m3 for the three conditions, respectively. Participants rode a stationary bicycle to simulate physical effort at regular intervals during exposure. Objective measures evaluated in this study included ocular irritation via eye blink task and eye photography and pulmonary function via spirometry, while subjective measures included health symptoms ratings, irritation and dryness ratings of eyes, nose, throat and mouth. RESULTS Objective measures of pulmonary function and ocular irritation did not reveal any exposure-related changes. Exposure-related changes in symptom reporting were observed; however, the highest symptom ratings did not exceed "slight" on the scale. CONCLUSIONS The results indicate at the concentrations and acute durations tested, PG does not affect human respiratory function or produce ocular irritation.
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Affiliation(s)
- Pamela Dalton
- a Monell Chemical Senses Center , Philadelphia , PA , USA
| | - Brianna Soreth
- a Monell Chemical Senses Center , Philadelphia , PA , USA
| | | | | | - Marcy Banton
- b Lyondell Chemical Company , Houston , TX , USA
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Kosmider L, Spindle TR, Gawron M, Sobczak A, Goniewicz ML. Nicotine emissions from electronic cigarettes: Individual and interactive effects of propylene glycol to vegetable glycerin composition and device power output. Food Chem Toxicol 2018; 115:302-305. [PMID: 29572013 PMCID: PMC6363104 DOI: 10.1016/j.fct.2018.03.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/27/2018] [Accepted: 03/19/2018] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The power output of e-cigarettes varies considerably, as does the composition of liquids used with these products. Most e-cigarette liquids contain two primary solvents: propylene glycol (PG) and vegetable glycerin (VG). The primary aim of this study was to examine the extent to which PG and VG composition and device power interact with each other to influence e-cigarette nicotine emissions. METHODS Aerosols were generated using a 2nd generation e-cigarette and an automatic smoking machine. Nicotine was measured in aerosols, via gas chromatography, produced from three solutions containing pure PG, pure VG, or a mixture of both solvents (50:50) across three different power settings (4.3, 6.7, and 9.6 W). RESULTS At the lowest power setting, nicotine yield increased significantly as more PG was added to the solution. However, as device power was increased, differences in nicotine yield across liquids became less pronounced. At the highest power setting (9.6 W), nicotine yields did not differ across the three liquids examined. CONCLUSIONS The present study demonstrated that the extent to which e-cigarette liquid PG and VG composition influences nicotine emissions is dependent on device power. Thus, device power may influence e-cigarette nicotine emissions to a greater degree relative to solvent concentrations.
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Affiliation(s)
- Leon Kosmider
- Department of Pharmaceutics, School of Pharmacy, Virginia Commonwealth University and Affiliated with Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, USA; School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Department of General and Analytical Chemistry, Jagiellońska 4, 41-200 Sosnowiec, Poland.
| | - Tory R Spindle
- Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, VA, USA
| | - Michal Gawron
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Department of General and Analytical Chemistry, Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Andrzej Sobczak
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Department of General and Analytical Chemistry, Jagiellońska 4, 41-200 Sosnowiec, Poland; Institute of Occupational Medicine and Environmental Health, Kościelna 13, 41-200 Sosnowiec, Poland
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Nair S, Nagarajappa GB, Pandey KK. UV stabilization of wood by nano metal oxides dispersed in propylene glycol. J Photochem Photobiol B 2018; 183:1-10. [PMID: 29679688 DOI: 10.1016/j.jphotobiol.2018.04.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/04/2018] [Accepted: 04/05/2018] [Indexed: 10/17/2022]
Abstract
Nanoparticles of some of the metal oxides are known to have high UV protective efficiency. The UV filtering efficiency of nanoparticles invariably depends on their size and stability in the dispersion. In the present work, a stable dispersion of nanoparticles of three metal oxides, zinc oxide (ZnO), cerium oxide (CeO2) and titanium dioxide (TiO2), was prepared in propylene glycol (PG) using ultrasonication. The method is easy and useful as no additional surfactant or dispersant is needed. The particle size and its distribution was confirmed by Scanning Electron Microscopy and Dynamic Light Scattering. The stability of dispersion was assessed by UV-visible absorption spectroscopy. The UV stability of wood surfaces of Wrightia tinctoria coated with nanodispersions of ZnO, CeO2 and TiO2 was evaluated under laboratory conditions in an accelerated weathering tester. Changes in the colour and FTIR spectra of exposed specimens were measured periodically. Rapid colour darkening (yellowing) was observed in uncoated and PG coated specimens. In contrast, nanodispersion coated specimens prevented photo-yellowing considerably with significant reduction in colour changes examined by CIE L*, a*, b* and ΔE*. Increase in concentration of nanoparticles in the dispersion imparted higher resistance to UV induced degradation. However, increased concentration of nanoparticles reduced the transparency of the coating. FTIR analysis indicated rapid degradation of lignin in uncoated and PG coated specimens due to UV exposure. Coating of wood surfaces with nanodispersions restricted lignin degradation. The study also demonstrates the potential of propylene glycol as a dispersant for developing stable and efficient UV protective nanodispersions for wood coating.
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Affiliation(s)
- Sreeja Nair
- Institute of Wood Science and Technology, 18th Cross Malleswaram, Bengaluru 560 003, India
| | - Giridhar B Nagarajappa
- Institute of Wood Science and Technology, 18th Cross Malleswaram, Bengaluru 560 003, India
| | - Krishna K Pandey
- Institute of Wood Science and Technology, 18th Cross Malleswaram, Bengaluru 560 003, India.
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Bianchetti DGAM, Amelio GS, Lava SAG, Bianchetti MG, Simonetti GD, Agostoni C, Fossali EF, Milani GP. D-lactic acidosis in humans: systematic literature review. Pediatr Nephrol 2018; 33:673-681. [PMID: 29218437 DOI: 10.1007/s00467-017-3844-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 10/31/2017] [Accepted: 11/03/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND D-lactic acidosis is an uncommon and challenging form of metabolic acidosis that may develop in short bowel syndrome. It has been documented exclusively in case reports and small case series. METHODS We performed a review of the literature in the National Library of Medicine and Excerpta Medica databases. RESULTS We identified 84 original reports published between 1977 and 2017. D-lactic acidosis was observed in 98 individuals ranging in age from 7 months to 86 years with short bowel syndrome. The clinical presentation included Kussmaul breathing, confusion, slurred speech, and gait disturbances. Furthermore, among 99 consecutive patients with short bowel syndrome, 21 reported having episodes with symptoms consistent with D-lactic acidosis. In addition, D-lactic acid might also contribute to acidosis in diabetes mellitus. Finally, abnormally high D-lactic acid was documented after administration or ingestion of large amounts of propylene glycol, as paraneoplastic phenomenon and perhaps also in a so far poorly characterized inherited inborn error of metabolism. CONCLUSIONS In humans with short bowel syndrome (or carbohydrate malabsorption), D-lactic acidosis is likely rather common and under-recognized. This condition should be included in the differential diagnosis of unexplained high-gap metabolic acidosis where the anion causing the acidosis is not known. Furthermore, diabetic acidosis might be caused by accumulation of both ketone bodies and D-lactic acid. Finally, there are endogenous sources of D-lactic acid in subjects with propylene glycol intoxication.
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Affiliation(s)
- Davide G A M Bianchetti
- Pediatric Department of Southern Switzerland, Bellinzona, and Università della Svizzera Italiana, Lugano, Switzerland
| | - Giacomo S Amelio
- Pediatric Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico and Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Sebastiano A G Lava
- Department of Pediatrics, University Children's Hospital of Bern, Inselspital, Bern, Switzerland
| | - Mario G Bianchetti
- Pediatric Department of Southern Switzerland, Bellinzona, and Università della Svizzera Italiana, Lugano, Switzerland.
| | - Giacomo D Simonetti
- Pediatric Department of Southern Switzerland, Bellinzona, and Università della Svizzera Italiana, Lugano, Switzerland
| | - Carlo Agostoni
- Pediatric Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico and Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Emilio F Fossali
- Pediatric Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico and Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Gregorio P Milani
- Pediatric Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico and Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
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