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1.
Int J Biol Macromol ; 265(Pt 1): 130949, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38508545

ABSTRACT

This study addresses the growing interest in bio-based active food packaging by infusing Lepidium sativum (Garden cress) seeds extract (GRCE) into sodium alginate (SALG) films at varying concentrations (1, 3, and 5 %). The GRCE extract revealed six phenolic compounds, with gallic and chlorogenic acids being prominent, showcasing substantial total phenolic content (TPC) of 139.36 µg GAE/mg and total flavonoid content (TFC) of 26.46 µg RE/mg. The integration into SALG films significantly increased TPC, reaching 30.73 mg GAE/g in the film with 5 % GRCE. This enhancement extended to DPPH and ABTS activities, with notable rises to 66.47 and 70.12 %, respectively. Physical properties, including tensile strength, thickness, solubility, and moisture content, were positively affected. A reduction in water vapor permeability (WVP) was reported in the film enriched with 5 % GRCE (1.389 × 10-10 g H2O/m s p.a.). FT-IR analysis revealed bands indicating GRCE's physical interaction with the SALG matrix, with thermal stability of the films decreasing upon GRCE integration. SALG/GRCE5 effectively lowered the peroxide value (PV) of sunflower oil after four weeks at 50 °C compared to the control, with direct film-oil contact enhancing this reduction. Similar trends were observed in the K232 and K270 values.


Subject(s)
Alginates , Lepidium sativum , Alginates/chemistry , Spectroscopy, Fourier Transform Infrared , Food Packaging/methods , Phenols , Plant Extracts/chemistry , Oxidative Stress
2.
Int J Nanomedicine ; 14: 8445-8467, 2019.
Article in English | MEDLINE | ID: mdl-31754301

ABSTRACT

PURPOSE: Over the past 30 years, no consistent survival benefits have been recorded for anticancer agents of advanced hepatocellular carcinoma (HCC), except for the multikinase inhibitor sorafenib (Nexavar®), which clinically achieves only ~3 months overall survival benefit. This modest benefit is attributed to limited aqueous solubility, slow dissolution rate and, consequently, limited absorption from the gastrointestinal tract. Thus, novel formulation modalities are in demand to improve the bioavailability of the drug to attack HCC in a more efficient manner. In the current study, we aimed to design a novel sorafenib-loaded carbon nanotubes (CNTs) formula that is able to improve the therapeutic efficacy of carried cargo against HCC and subsequently investigate the antitumour activity of this formula. MATERIALS AND METHODS: Sorafenib was loaded on functionalized CNTs through physical adsorption, and an alginate-based method was subsequently applied to microcapsulate the drug-loaded CNTs (CNTs-SFN). The therapeutic efficacy of the new formula was estimated and compared to that of conventional sorafenib, both in vitro (against HepG2 cells) and in vivo (in a DENA-induced HCC rat model). RESULTS: The in vitro MTT anti-proliferative assay revealed that the drug-loaded CNTs formula was at least two-fold more cytotoxic towards HepG2 cells than was sorafenib itself. Moreover, the in vivo animal experiments proved that our innovative formula was superior to conventional sorafenib at all assessed end points. Circulating AFP-L3% was significantly decreased in the CNTs-SFN-MCs-treated group (14.0%) in comparison to that of the DENA (40.3%) and sorafenib (38.8%) groups. This superiority was further confirmed by Western blot analysis and immunofluorescence assessment of some HCC-relevant biomarkers. CONCLUSION: Our results firmly suggest the distinctive cancer-suppressive nature of CNTs-SFN-MCs, both against HepG2 cells in vitro and in a DENA-induced HCC rat model in vivo, with a preferential superiority over conventional sorafenib.


Subject(s)
Carcinoma, Hepatocellular/drug therapy , Drug Design , Liver Neoplasms/drug therapy , Nanotubes, Carbon/chemistry , Sorafenib/therapeutic use , Animals , Antineoplastic Agents/blood , Antineoplastic Agents/pharmacokinetics , Antineoplastic Agents/pharmacology , Antineoplastic Agents/therapeutic use , Biomarkers, Tumor/metabolism , Body Weight/drug effects , Carcinoma, Hepatocellular/pathology , Cell Proliferation/drug effects , Drug Compounding , Hep G2 Cells , Humans , Hydrogen-Ion Concentration , Liver/drug effects , Liver/pathology , Liver Neoplasms/pathology , Male , Nanotubes, Carbon/ultrastructure , Niacinamide/pharmacology , Rats, Wistar , Sorafenib/blood , Sorafenib/pharmacokinetics , Sorafenib/pharmacology , Spectroscopy, Fourier Transform Infrared , Static Electricity
3.
Drug Alcohol Depend ; 181: 132-139, 2017 12 01.
Article in English | MEDLINE | ID: mdl-29054032

ABSTRACT

BACKGROUND: Opioid substitution treatment (OST) is often continued long-term and, therefore, opioid-associated symptoms are of interest. Symptoms associated with methadone maintenance treatment (MMT) in men are well described, but there are fewer reports concerning symptoms associated with buprenorphine maintenance treatment (BMT) and very few reports among women. METHOD: Recipients of BMT (n=113) and MMT (n=184), non-opioid users (n=105) and opioid users not receiving OST (n=87) completed the Patient Assessment of Constipation (PAC-SYM) and a general symptom checklist. Multivariate analysis included other potential moderators of opioid-associated symptoms. FINDINGS: Opioid users reported a higher frequency and severity of symptoms than non-opioid users. Constipation, dry mouth, decreased appetite, sweating and fatigue were highly prevalent in the previous 30days (51-80%). Nausea, itchy skin, trouble urinating, menstrual problems, lightheadedness, blurred vision, heart racing were also common (30-50%). Non-OST opioid users had significantly higher frequency and severity than OST recipients of nausea, vomiting, diarrhoea, decreased appetite, sweating and itchy skin. Sweating was significantly more common in MMT than BMT. Constipation scores were higher in women, otherwise most sex differences were small. Higher PAC-SYM scores were associated with vomiting (OR=1.04) and sweating (OR=1.06). Cannabis use was associated with vomiting (OR=2.19). Constipation (OR=1.07), insomnia (OR=2.5) and depression (OR=2.82) were associated with fatigue. CONCLUSION: Men and women receiving OST report similarly high rates of somatic symptoms, though less than opioid users not receiving OST. There were few differences between BMT and MMT. Buprenorphine might be preferred where sweating is problematic. Several modifiable factors were identified.


Subject(s)
Buprenorphine/adverse effects , Constipation/chemically induced , Drug-Related Side Effects and Adverse Reactions/epidemiology , Methadone/adverse effects , Opiate Substitution Treatment/adverse effects , Adult , Analgesics, Opioid/therapeutic use , Australia/epidemiology , Buprenorphine/therapeutic use , Case-Control Studies , Constipation/epidemiology , Depression , Female , Humans , Male , Methadone/therapeutic use , Opioid-Related Disorders/drug therapy , Prevalence , Sex Factors , Young Adult
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