-
Veterinary Research Communications May 2024The present study was undertaken to assess the ameliorative effect of dietary supplementation of astaxanthin in Sirohi goats under simulated heat stress conditions....
The present study was undertaken to assess the ameliorative effect of dietary supplementation of astaxanthin in Sirohi goats under simulated heat stress conditions. Eighteen healthy female Sirohi goats were divided equally into three groups (n = 6): Heat-Stressed Control (HSC), Treatment 1 (T1), and Treatment 2 (T2). During the experiment, goats in the T1 group were supplemented with astaxanthin at the rate of 25 mg/animal/day, while those in the T2 group received supplementation of 50 mg/animal/day. The experiment was conducted for 42 days: 14 days of acclimatization period, next 21 days animals were exposed to 42ºC for 6 h from 09:00 h to 15:00 h and 7 days of recovery period. On a daily basis, we recorded the physiological responses of goats and collected environmental data at the experimental site. Blood samples were collected 0 and 14th days of acclimatization, on 1st, 6th, 11th, 16th and 21st day of heat exposure and on the 7th day of the recovery period. The rectal temperature and respiration rates of the treatment groups were lower than those of the HSC group during the exposure period. Heat stress in the supplemented groups was associated with reduced levels of hepatic enzymes such as AST and ALT. Serum urea, creatinine and albumin levels were significantly (P < 0.05) different between control and treatment groups. It was thus concluded that dietary inclusion of antioxidant astaxanthin can ameliorate induced thermal load as evident from changes in physio-biochemical parameters in the Sirohi goats, that was more prominent at 50 mg/ animal/day than 25 mg/ animal/day.
PubMed: 38750293
DOI: 10.1007/s11259-024-10327-x -
European Journal of Drug Metabolism and... Jul 2024Astaxanthin is a naturally occurring carotenoid with high anti-oxidant properties, but it is a very lipophilic compound with low oral bioavailability. This study was... (Comparative Study)
Comparative Study Randomized Controlled Trial
BACKGROUND AND OBJECTIVE
Astaxanthin is a naturally occurring carotenoid with high anti-oxidant properties, but it is a very lipophilic compound with low oral bioavailability. This study was conducted to compare the pharmacokinetic parameters of a novel astaxanthin preparation based on micellar solubilization technology, NovaSOL 400-mg capsules (Test product), and those of astaxanthin 400-mg capsules (reference product), after single oral dose administration to healthy male adults.
METHODS
A single oral dose (400 mg equivalent to 8 mg astaxanthin) of test and reference astaxanthin were administered with 240 mL of water to 12 volunteers according to crossover design, in two phases, with a washout period of 1 week in between. Blood samples were collected at hourly intervals for the first 12 h, then at 24.0, 48.0, and 72.0 h after administration. Aliquots of plasma were centrifuged and the clear supernatant was injected into the high performance liquid chromatography-diode array detection (HPLC-DAD) system. Plasma concentration of astaxanthin versus time profiles were constructed, and the primary pharmacokinetic parameters, maximum concentration (C), area under concentration time curve from time of administration (0) to time (t) [AUC] or to infinity ∞, [AUC], half-life (T) and time to reach C (T) were calculated.
RESULTS
The test micellar astaxanthin reached a C of 7.21 µg/ml after 3.67 h compared to only 3.86 µg/ml after 8.5 h for the reference native astaxanthin.
CONCLUSION
Micellar formulation of astaxanthin is capable of producing a high concentration of astaxanthin in plasma in a shorter time, thereby expected to provide faster potential therapeutic efficacy.
Topics: Xanthophylls; Humans; Male; Adult; Micelles; Cross-Over Studies; Young Adult; Area Under Curve; Healthy Volunteers; Administration, Oral; Half-Life; Biological Availability; Capsules; Chromatography, High Pressure Liquid
PubMed: 38748358
DOI: 10.1007/s13318-024-00898-0 -
Journal of Orthopaedic Surgery and... May 2024Osteonecrosis of the femoral head caused by glucocorticoids (GIONFH) is a significant issue resulting from prolonged or excessive clinical glucocorticoid use....
Astaxanthin-mediated Nrf2 activation ameliorates glucocorticoid-induced oxidative stress and mitochondrial dysfunction and impaired bone formation of glucocorticoid-induced osteonecrosis of the femoral head in rats.
BACKGROUND
Osteonecrosis of the femoral head caused by glucocorticoids (GIONFH) is a significant issue resulting from prolonged or excessive clinical glucocorticoid use. Astaxanthin, an orange-red carotenoid present in marine organisms, has been the focus of this study to explore its impact and mechanism on osteoblast apoptosis induced by dexamethasone (Dex) and GIONFH.
METHODS
In this experiment, bioinformatic prediction, molecular docking and dynamics simulation, cytotoxicity assay, osteogenic differentiation, qRT-PCR analysis, terminal uridine nickend labeling (TUNEL) assay, determination of intracellular ROS, mitochondrial function assay, immunofluorescence, GIONFH rat model construction, micro-computed tomography (micro-CT) scans were performed.
RESULTS
Our research demonstrated that a low dose of astaxanthin was non-toxic to healthy osteoblasts and restored the osteogenic function of Dex-treated osteoblasts by reducing oxidative stress, mitochondrial dysfunction, and apoptosis. Furthermore, astaxanthin rescued the dysfunction in poor bone quality, bone metabolism and angiogenesis of GIONFH rats. The mechanism behind this involves astaxanthin counteracting Dex-induced osteogenic damage by activating the Nrf2 pathway.
CONCLUSION
Astaxanthin shields osteoblasts from glucocorticoid-induced oxidative stress and mitochondrial dysfunction via Nrf2 pathway activation, making it a potential therapeutic agent for GIONFH treatment.
Topics: Animals; Xanthophylls; Oxidative Stress; NF-E2-Related Factor 2; Glucocorticoids; Femur Head Necrosis; Osteogenesis; Mitochondria; Rats; Osteoblasts; Male; Dexamethasone; Rats, Sprague-Dawley; Apoptosis; Disease Models, Animal
PubMed: 38745231
DOI: 10.1186/s13018-024-04775-z -
Colloids and Surfaces. B, Biointerfaces Jul 2024The controlled release of antioxidant substances at the intestinal oxidative damage site is crucial for alleviating intestine-related diseases. Herein, the novel...
The controlled release of antioxidant substances at the intestinal oxidative damage site is crucial for alleviating intestine-related diseases. Herein, the novel ROS-responsive carrier was synthesized through simple amidation reaction between carboxymethyl chitosan (CMC) and methionine (Met), a natural organic compound containing ROS-responsive linkages (thioether). Initially, astaxanthin (AXT) nanoparticles (AXT@CMT) with excellent stability and drug loading capacity (39.68 ± 0.23 μg/mL) were prepared by optimizing various reaction conditions. In the simulated high-concentration ROS environment of the intestine, CMT achieved a transition from hydrophobic groups (thioether) into hydrophilic groups (sulfone), which was conducive to the controlled release of AXT. In vitro cell experiments revealed that AXT@CMT could effectively alleviate the oxidative damage in intestinal epithelioid cell line No. 6 (IEC-6 cell) caused by HO. This study achieved a straightforward preparation of ROS-responsive nanocarrier through food ingredients, offering a theoretical foundation for the controlled release of AXT at the intestinal oxidative damage site.
Topics: Xanthophylls; Chitosan; Nanoparticles; Reactive Oxygen Species; Oxidative Stress; Animals; Antioxidants; Rats; Intestines; Cell Line; Particle Size; Cell Survival; Drug Carriers; Hydrogen Peroxide; Drug Liberation
PubMed: 38744080
DOI: 10.1016/j.colsurfb.2024.113960 -
Frontiers in Microbiology 2024Abiotic stresses can increase the total fatty acid (TFA) and astaxanthin accumulation in microalgae. However, it remains unknown whether a unified signal transduction...
Abiotic stresses can increase the total fatty acid (TFA) and astaxanthin accumulation in microalgae. However, it remains unknown whether a unified signal transduction mechanism exists under different stresses. This study explored the link between nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-derived reactive oxygen species (ROS) and the accumulation of fatty acids and astaxanthin in under three abiotic stresses. Results showed significant increases in fatty acid, astaxanthin, and ROS levels under nitrogen deficiency, phosphorus deficiency, and high-salinity stress. The introduction of the NADPH oxidase inhibitor diphenyleneiodonium (DPI) decreased the content of these components. This underscores the pivotal role of NADPH oxidase-derived ROS in the accumulation of fatty acid and astaxanthin under abiotic stress. Analysis of transcriptomes across three conditions following DPI addition revealed 1,445 shared differentially expressed genes (DEGs). Enrichment analysis revealed that biotin, betalain, thiamine, and glucosinolate may be important in stress responses. The heatmap demonstrated that DPI notably suppressed gene expression in the fatty acid and carotenoid biosynthesis pathways. Our findings underscore the pivotal role of NADPH oxidase-derived ROS in the accumulation of fatty acid and astaxanthin under abiotic stresses.
PubMed: 38741732
DOI: 10.3389/fmicb.2024.1387222 -
ACS Nano May 2024A significant gap exists in the demand for safe and effective drugs for inflammatory bowel disease (IBD), and its associated intestinal fibrosis. As oxidative stress...
A significant gap exists in the demand for safe and effective drugs for inflammatory bowel disease (IBD), and its associated intestinal fibrosis. As oxidative stress plays a central role in the pathogenesis of IBD, astaxanthin (AST), a good antioxidant with high safety, holds promise for treating IBD. However, the application of AST is restricted by its poor solubility and easy oxidation. Herein, different protein-based nanoparticles (NPs) are fabricated for AST loading to identify an oral nanovehicle with potential clinical applicability. Through systematic validation via molecular dynamics simulation and characterization of properties, whey protein isolate (WPI)-driven NPs using a simple preparation method without the need for cross-linking agents or emulsifiers were identified as the optimal carrier for oral AST delivery. Upon oral administration, the WPI-driven NPs, benefiting from the intrinsic pH sensitivity and mucoadhesive properties, effectively shielded AST from degradation by gastric juices and targeted release of AST at intestinal lesion sites. Additionally, the AST NPs displayed potent therapeutic efficacy in both dextran sulfate sodium (DSS)-induced acute colitis and chronic colitis-associated intestinal fibrosis by ameliorating inflammation, oxidative damage, and intestinal microecology. In conclusion, the AST WPI NPs hold a potential therapeutic value in treating inflammation and fibrosis in IBD.
Topics: Whey Proteins; Animals; Inflammatory Bowel Diseases; Reactive Oxygen Species; Administration, Oral; Nanoparticles; Prebiotics; Fibrosis; Inflammation; Mice; Xanthophylls; Dextran Sulfate; Mice, Inbred C57BL; Male; Antioxidants; Humans
PubMed: 38740518
DOI: 10.1021/acsnano.3c13114 -
Neurosciences (Riyadh, Saudi Arabia) May 2024To investigate the fundamental mechanisms of the neuroprotective impact of Astaxanthin (AST) in a mouse model of Alzheimer's disease (AD) induced by scopolamine.
OBJECTIVES
To investigate the fundamental mechanisms of the neuroprotective impact of Astaxanthin (AST) in a mouse model of Alzheimer's disease (AD) induced by scopolamine.
METHODS
This research constituted an in vivo animal study encompassing 36 adult male mice, divided into 6 groups: Control, 100 mg/kg AST, 2 mg/kg scopolamine (AD group), 100 mg/kg AST+2 mg/kg scopolamine, 3 mg/kg galantamine+2 mg/kg scopolamine, and 100 mg/kg AST+3 mg/kg galantamine+2 mg/kg scopolamine. After 14 days, the mice's short-term memory, hippocampus tissue, oxidative and inflammatory markers were evaluated.
RESULTS
The AST demonstrated a beneficial influence on short-term memory and a reduction in acetylcholinesterase activity in the brain. It exhibited neuroprotective and anti-amyloidogenic properties, significantly decreased pro-inflammatory markers and oxidative stress, and reversed the decline of the Akt-1 and phosphorylated Akt pathway, a crucial regulator of abnormal tau. Furthermore, AST enhanced the effect of galantamine in reducing inflammation and oxidative stress.
CONCLUSION
The findings indicate that AST may offer therapeutic benefits against cognitive dysfunction in AD. This is attributed to its ability to reduce oxidative stress, control neuroinflammation, and enhance Akt-1 and pAkt levels, thereby underscoring its potential in AD treatment strategies.
Topics: Animals; Xanthophylls; Alzheimer Disease; Scopolamine; Male; Mice; Neuroprotective Agents; Disease Models, Animal; Oxidative Stress; Hippocampus; Acetylcholinesterase; Galantamine; Memory, Short-Term
PubMed: 38740397
DOI: 10.17712/nsj.2024.2.20230060 -
Bioresource Technology Jun 2024Effective metabolic regulators play an essential role in regulating astaxanthin biosynthesis in Phaffia rhodozyma. In this study, it was found that 5 mM glutamate...
Effective metabolic regulators play an essential role in regulating astaxanthin biosynthesis in Phaffia rhodozyma. In this study, it was found that 5 mM glutamate increased the astaxanthin yield and biomass of P. rhodozyma D3 to 22.34 mg/L and 6.12 g/L, which were 1.22 and 1.33 times higher than the control group, respectively. Meanwhile, glucose uptake was increased and the level of reactive oxygen species (ROS) was reduced with 5 mM glutamate. To further explore the interrelationship between glutamate and astaxanthin synthesis, the energy metabolism of P. rhodozyma D3 with and without glutamate was analysed. Glutamate promoted the Embden-Meyerhof-Parnas pathway (EMP) metabolic flux, modulated the tricarboxylic acid (TCA) cycle and the pentose phosphate pathway (PPP), activated the ornithine cycle and purine metabolism, and provided more ATP and NADPH for astaxanthin accumulation. This study clarified the possible mechanism by which glutamate promoted astaxanthin accumulation in P. rhodozyma.
Topics: Xanthophylls; Glutamic Acid; Biomass; Energy Metabolism; Reactive Oxygen Species; Glucose
PubMed: 38740311
DOI: 10.1016/j.biortech.2024.130834 -
Protective effect of astaxanthin on testis torsion/detorsion injury through modulation of autophagy.Revista Internacional de Andrologia Mar 2024A significant clinical condition known as testicular torsion leads to permanent ischemic damage to the testicular tissue and consequent loss of function in the...
A significant clinical condition known as testicular torsion leads to permanent ischemic damage to the testicular tissue and consequent loss of function in the testicles. In this study, it was aimed to evaluate the protective effects of Astaxanthin (ASTX) on testicular damage in rats with testicular torsion/detorsion in the light of biochemical and histopathological data. Spraque Dawley rats of 21 were randomly divided into three groups; sham, testicular torsion/detorsion (TTD) and astaxanthin + testicular torsion/detorsion (ASTX + TTD). TTD and ASTX + TTD groups underwent testicular torsion for 2 hours and then detorsion for 4 hours. Rats in the ASTX + TTD group were given 1 mg/kg/day astaxanthin by oral gavage for 7 days before torsion. Following the detorsion process, oxidative stress parameters and histopathological changes in testicular tissue were evaluated. Malondialdehyde (MDA) and total oxidant status (TOS) levels were significantly decreased in the ASTX group compared to the TTD group, while superoxide dismutase (SOD), glutathione (GSH) and total antioxidant status (TAS) levels were increased ( < 0.05). Moreover, histopathological changes were significantly reduced in the group given ASTX ( < 0.0001). It was determined that ASTX administration increased Beclin-1 immunoreactivity in ischemic testicular tissue, while decreasing caspase-3 immunoreactivity ( < 0.0001). Our study is the first to investigate the antiautophagic and antiapoptotic properties of astaxanthin after testicular torsion/detorsion based on the close relationship of Beclin-1 and caspase-3 in ischemic tissues. Our results clearly demonstrate the protective effects of ASTX against ischemic damage in testicular tissue. In ischemic testicular tissue, ASTX contributes to the survival of cells by inducing autophagy and inhibiting the apoptosis.
Topics: Male; Spermatic Cord Torsion; Animals; Xanthophylls; Autophagy; Rats; Rats, Sprague-Dawley; Testis; Oxidative Stress; Antioxidants; Apoptosis; Malondialdehyde; Random Allocation; Reperfusion Injury; Superoxide Dismutase; Glutathione
PubMed: 38735875
DOI: 10.22514/j.androl.2024.005 -
Food Research International (Ottawa,... Jun 2024In this study, three types of β-sitosterol-based oleogels (β-sitosterol + γ-oryzanol oleogels, β-sitosterol + lecithin, oleogels and...
In this study, three types of β-sitosterol-based oleogels (β-sitosterol + γ-oryzanol oleogels, β-sitosterol + lecithin, oleogels and β-sitosterol + monostearate oleogels), loaded with astaxanthin, were employed as the oil phase to create oleogel-based emulsions (SO, SL, and SM) using high-pressure homogenization. The microstructure revealed that fine-scale crystals were dispersed within the oil phase of the droplets in the β-sitosterol oleogel-based emulsion. The bioaccessibility of astaxanthin was found to be 58.13 %, 51.24 %, 36.57 %, and 45.72 % for SM, SL, SO, and the control group, respectively. Interestingly, the release of fatty acids was positively correlated with the availability of astaxanthin (P = 0.981). Further analysis of FFAs release and kinetics indicated that the structural strength of the oil-phase in the emulsions influenced the degree and rate of lipolysis. Additionally, the micellar fraction analysis suggested that the nature and composition of the oleogelators in SM and SL also impacted lipolysis and the bioaccessibility of astaxanthin. Furthermore, interfacial binding of lipase and isothermal titration calorimetry (ITC) measurements revealed that the oleogel network within the oil phase of the emulsion acted as a physical barrier, hindering the interaction between lipase and lipid. Overall, β-sitosterol oleogel-based emulsions offer a versatile platform for delivering hydrophobic molecules, enhancing the bioavailability of active compounds, and achieving sustained release.
Topics: Sitosterols; Emulsions; Xanthophylls; Organic Chemicals; Biological Availability; Lipolysis; Lecithins; Fatty Acids; Phenylpropionates
PubMed: 38729698
DOI: 10.1016/j.foodres.2024.114350