Curcumin: Biological, Pharmaceutical, Nutraceutical, and Analytical Aspects

Effect of curcumin on methotrexate-induced ovarian damage and follicle reserve in rats: the role of PARP-1 and P53

BACKGROUND

Methotrexate (MTX) is an agent used in the treatment of many neoplastic and non-neoplastic diseases and is known to cause oxidative damage in normal tissues. Curcumin (Cur) is a natural polyphenol compound with powerful antioxidant and antiapoptotic effects. In this study we investigate the effects of Cur on MTX-induced ovarian damage.

MATERIALS AND METHODS

Thirty-two young adult female Wistar albino rats were divided into four groups: (1) Control (n = 8): only vehicle group, (2) Cur (n = 8): Cur-only group (200 mg/kg/day), (3) MTX (n = 8): MTX-only group (0.35 mg/kg/day), (4) MTX+Cur (n = 8): The group was given MTX (0.35 mg/kg/day) and Cur (200 mg/kg/day) for 28 days. Then, SOD, CAT, MDA, AMH levels were measured using ELISA kits. Follicle count was performed on H&E stained slides. In addition, the expressions of P53 and PARP-1 were analysed by immunohistochemistry.

RESULTS

MDA levels were seen to be higher in the MTX group than in the MTX+Cur group (p < 0.05). Cur treatment lowered MDA levels and increased SOD and CAT levels (p < 0.05 for all). In the MTX+Cur group, atretic follicle count decreased (p < 0,05), however, primordial follicle count increased (p < 0,01). Secondary follicle count and AMH levels were higher in MTX-treated groups (p < 0,05 and p < 0,01, respectively). Expressions of p53 and Poly [ADP-ribose] polymerase 1 (PARP-1) increased significantly in the MTX group compared to the other groups (p < 0,05).

CONCLUSION

Cur pretreatment prior to MTX administration may be an effective option in preserving the ovarian follicle pool by regulating P53 and PARP-1 expressions with its antioxidant effect.

Mechanically regulated microcarriers with stem cell loading for skin photoaging therapy

Long-term exposure to ultraviolet radiation compromises skin structural integrity and results in disruption of normal physiological functions. Stem cells have gained attention in anti-photoaging, while controlling the tissue mechanical microenvironment of cell delivery sites is crucial for regulating cell fate and achieving optimal therapeutic performances. Here, we introduce a mechanically regulated human recombinant collagen (RHC) microcarrier generated through microfluidics, which is capable of modulating stem cell differentiation to treat photoaged skin. By controlling the cross-linking parameters, the mechanical properties of microcarriers could precisely tuned to optimize the stem cell differentiation. The microcarriers are surface functionalized with fibronectin (Fn)-platelet derived growth factor-BB (PDGF-BB) to facilitate adipose derived mesenchymal stem cells (Ad-MSCs) loading. In in vivo experiments, subcutaneous injection of stem cell loaded RHC microcarriers significantly reduced skin wrinkles after ultraviolet-injury, effectively promoted collagen synthesis, and increased vascular density. These encouraging results indicate that the present mechanically regulated microcarriers have great potential to deliver stem cells and regulate their differentiation for anti-photoaging treatments.

Impact of curcumin on gut microbiome

The intricate interplay between natural compounds like curcumin and the gut microbiome has gained significant attention in recent years due to their potential therapeutic implications in various health conditions. Curcumin, a polyphenolic compound derived from turmeric, exhibits diverse pharmacological properties, including anti-inflammatory, antioxidant, and anticancer effects. Understanding how curcumin modulates gut microbiota composition and function is crucial for elucidating its therapeutic mechanisms. This review examines the current literature on the interactions between curcumin and the gut microbiome. A systematic search of relevant databases was conducted to identify studies investigating the effects of curcumin on gut microbial diversity and abundance. Key findings from studies exploring curcumin's efficacy in neurological disorders, gastrointestinal diseases, and metabolic dysfunction are synthesized and discussed. Studies have demonstrated that curcumin supplementation can modulate gut microbiota composition and function, leading to beneficial effects on gut health and homeostasis. Mechanisms underlying curcumin's therapeutic effects include immune modulation, neuroprotection, and inflammation regulation. However, challenges such as poor bioavailability and safety concerns remain significant hurdles to overcome. The interactions between curcumin and the gut microbiome hold promise for therapeutic interventions in a diverse range of health conditions. Further research is needed to optimize curcumin formulations, improve bioavailability, and address safety concerns.

Mitochondrial calcium uniporter complex: An emerging therapeutic target for cardiovascular diseases (Review)

Cardiovascular disease (CVD) is currently a major factor affecting human physical and mental health. In recent years, the relationship between intracellular Ca2+ and CVD has been extensively studied. Ca2+ movement across the mitochondrial inner membrane plays a vital role as an intracellular messenger, regulating energy metabolism and calcium homeostasis. It is also involved in pathological processes such as cardiomyocyte apoptosis, hypertrophy and fibrosis in CVD. The selective mitochondrial calcium uniporter complex (MCU complex) located in the inner membrane is essential for mitochondrial Ca2+ uptake. Therefore, the MCU complex is a potential therapeutic target for CVD. In this review, recent research progress on the pathophysiological mechanisms and therapeutic potential of the MCU complex in various CVDs was summarized, including myocardial ischemia‑reperfusion injury, pulmonary arterial hypertension, other peripheral vascular diseases, myocardial remodeling and arrhythmias. This review contributes to a deeper understanding of these mechanisms at the molecular level and highlights potential intervention targets for CVD treatment in clinical practice.

"Intrinsic disorder-protein modification-LLPS-tumor" regulatory axis: From regulatory mechanisms to precision medicine

Liquid-Liquid Phase Separation (LLPS) is an important mechanism for the formation of functional droplets. Protein modification is an important pathway to regulate LLPS, in which series of modifying groups realize dynamic regulation by changing the charge and spatial resistance of the modified proteins. Meanwhile, uncontrolled protein modifications associated with LLPS dysregulation are highly correlated with tumorigenesis and development, suggesting the existence of a potential regulatory axis between the three. In this review, we pioneered "protein modification-LLPS-tumor" regulatory axis and summarized protein modifications that regulate LLPS in cancer cells (including phosphorylation, acetylation, methylation, ubiquitination, SUMOylation, lactate, ADP-ribosylation, O-glycosylation, and acylation) and their associated modification mechanisms. Finally, we outline advances in precision medicine based on this regulatory axis. The aim of this review is to expand the understanding of protein modifications regulating LLPS under normal or abnormal cellular conditions and to provide possible ideas for precision therapy.

Building a Bridge Between the Mechanism of EBV Reactivation and the Treatment of EBV-Associated Cancers

Epstein-Barr virus (EBV) infection is closely associated with the development of various tumors such as lymphomas and epithelial cancers. EBV has a discrete life cycle with latency and lytic phases. In recent years, significant progress has been made in the understanding of the mechanism underlying the transition of EBV from latency to lytic replication. Multiple new lytic activation factors have been emerged and promoted our understanding of this field. In addition, we have comprehensively presented the existing therapeutic strategies and their relationship to the mechanism underlying the transition of EBV from latency to lytic replication in this review, such as lytic induction therapy and drugs to prevent EBV from entering the lytic phase fully utilize the EBV reactivation mechanisms. This year marks the 60th anniversary of the discovery of EBV, and building a bridge between the mechanism of EBV reactivation and the treatment may help us to design new approaches for treating EBV-associated diseases.

Turmeric supplement-associated hepatitis: a clinicopathological series of 11 cases highlighting pan-lobular and zone 3 injury

AIMS

Although turmeric is commonly ingested and well tolerated, there is increasing evidence that over-the-counter turmeric supplements can cause drug-induced liver injury. We sought to thoroughly characterise clinicopathological features of patients for whom liver injury was attributed clinically to turmeric supplements.

METHODS AND RESULTS

We identified 11 patients via retrospective pathology archive review: 10 females (91%) and one male, with a median age of 58 years (range = 37-66 years). Six patients (55%) were asymptomatic with abnormal liver function tests, while five patients (45%) presented with malaise and/or jaundice. Ten patients (91%) showed predominant transaminase abnormalities, while one exhibited predominant alkaline phosphatase elevation. Histologically, biopsies showed acute hepatitis (eight cases, 73%, including five pan-lobular and three zone 3-predominant inflammation), scattered lobular aggregates of histiocytes (two; 18%) and a chronic hepatitis pattern of injury (one; 9%). Mild bile duct injury was present in five biopsies (45%). All patients stopped ingesting turmeric supplements after presenting with liver injury, and four patients additionally received steroid therapy; liver function tests normalised in all patients. Roussel Uclaf causality assessment method (RUCAM) analysis estimated the likelihood of turmeric supplement-associated liver injury to be probable (eight cases) and possible (three).

CONCLUSIONS

Histological features in the 'possible' cases were consistent with drug-induced injury, highlighting the added benefit of histological analysis relative to RUCAM analysis isolation. This study underscores the need to obtain a full history of over-the-counter medications and supplements when investigating aetiologies for liver injury, including supplements purportedly containing innocuous compounds such as turmeric.

Does curcumin supplementation affect inflammation, blood count and serum brain-derived neurotropic factor concentration in amateur long-distance runners?

Curcumin is known for its potential health benefits; however, the evidence remains inconclusive regarding its necessity as a supplement for athletes during the preparatory phase of training. This study aimed to assess the effect of 6-week curcumin supplementation at a dose of 2g/day on selected inflammatory markers, blood count, and brain-derived neurotropic factor (BDNF) levels in middle-aged amateur long-distance runners during the preparatory period of a macrocycle. Thirty runners were randomly assigned to either a curcumin-supplemented group (CUR, n = 15) or a placebo group (PLA, n = 15). Venous blood samples were collected at rest, immediately post-exercise, and 1h post-exercise. The participants underwent a graded exercise stress test, with an increasing inclination angle after reaching a speed of 14 km/h, both before and after the 6-week supplementation period. Blood samples were collected at rest, 3 minutes post-stress test, and after 1 hour of recovery. The results showed no significant changes in C-reactive protein (CRP), interleukin-6 (IL-6), tumor necrosis factor α (TNF-α), interleukin-1 β (IL-1β), or blood morphology due to curcumin supplementation. However, BDNF levels increased by 21% in the CUR group post-supplementation, while a 5% decrease was observed in the PLA group. These findings do not support a significant effect of curcumin supplementation on inflammatory markers, blood count, or BDNF concentration. Further research is warranted to determine the potential benefits of curcumin supplementation for endurance athletes during the preparatory period for a training cycle.

Albumin as an Effective Auxiliary Agent for the Enriched Extraction of Anthraquinones and Curcumin from Plant Matrices

Nowadays, several processes to enrich desired bioactive compounds in plant extracts have been developed. The objective of the present study was to assess the performance of bovine serum albumin in increasing the extractive yields of anthraquinones and diarylheptanoids from their respective raw plant powder extracts. Aloe emodin, rhein, emodin, and chrysophanol, from Polygonum cuspidatum, Senna alexandrina, Rhamnus frangula, and Rheum palmatum, and curcumin from Curcuma longa were analyzed in parent dry extracts, solubilized either with water, ethanol, or hydro-alcoholic mixtures, and in ones treated with aqueous solutions of bovine serum albumin by HPLC with UV/Vis detection. The different ratios between the volumes of solvents, powdered plant extracts, and bovine serum albumin were tested. The addition of albumin provided an increase in the yields of aloe emodin in the range 7.8-50.4-fold; of rhein in the range 6.1-14.1-fold; of emodin in the range 19.7-39.7-fold; of chrysophanol in the range 15.1-28.7-fold; and, finally, of curcumin of 32.1-fold. The addition of bovine serum albumin in the processing of plant extracts has been shown to be a novel and a valid alternative, comparing favourably to already reported methodologies. The easy-to-handle procedures, readily accessible facilities, and the employment of cheap substrates and reagents represent the most evident advantages of the methodology described herein.

Therapeutic Potential of Curcumin in Diabetic Cardiomyopathy: Modulation of Pyroptosis Pathways

PURPOSE

Cardiac inflammation is a basic pathological process of diabetic cardiomyopathy (DCM). Inflammatory response is closely related to pyroptosis, which is a recently identified programmed cell death type. Curcumin (CUR) is a polyphenol extracted from turmeric and has been reported to be crucial in alleviating pyroptosis in DCM. However, the exact mechanism by which CUR improves pyroptosis remains unclear. Therefore, we aimed to investigate the effect of CUR on pyroptosis in DCM and explore the potential mechanisms.

METHODS

The molecular docking (MOD) analysis was performed using AutoDock Tools to evaluate the binding patterns and affinities between CUR and tripartite motif containing 21 (TRIM21), as well as between TRIM21 and gasdermin D (GSDMD). Subsequently, DCM models were established in Sprague-Dawley (SD) rats (in vivo) by administering streptozotocin (STZ) and feeding them a high-fat diet. In addition, H9C2 cells were cultured in a high glucose and palmitate environment to construct in vitro models of DCM. Rats or cells were treated by CUR directly. Subsequently, body weight (BW), heart weight (HW)/BW ratio, fasting blood glucose level, and lipid metabolism were measured. Pathological changes were analyzed using hematoxylin and eosin (H&E) and Masson staining. Small interfering RNA (si-RNA) was used to knockdown TRIM21 expression, and the pyroptosis protein expression and cellular activity were evaluated in different groups.

RESULTS

MOD analysis revealed that CUR had a strong binding affinity with TRIM21, and TRIM21 showed a robust interaction with GSDMD. STZ-induced diabetic SD rats showed metabolic abnormalities, structural changes in the ventricle, and the expression of TRIM21 and pyroptosis markers, including nod-like receptor protein-3 (NLRP3), Caspase-1, and GSDMD, were upregulated. CUR reduced cardiac remodeling and improved cardiac function in vivo. CUR inhibited pyroptosis by regulating TRIM21 through in vivo and in vitro studies.

CONCLUSION

CUR improves DCM by regulating TRIM21 expression to inhibit pyroptosis. Furthermore, this study provides novel approaches and experimental evidence for the research and treatment of DCM and presents new insights into its potential mechanisms.

Curcumin ameliorates astrocyte inflammation through AXL in cuprizone-induced mice

Curcumin has gained global attention owning to its anti-inflammatory, antioxidant, anticancer, and antimicrobial activities. Curcumin has recently been shown to have well-documented effects on neuroinflammation in multiple sclerosis (MS). Astrocytes, the most widely distributed glial cells in the brain, have a significant influence on the regulation of neuroinflammation in MS. However, it is unknown how curcumin exerts neuroprotective effects in astrocytes. To elucidate the mechanism underlying the effects of curcumin on astrocytes, we explored the effect of curcumin on cuprizone (CPZ)-induced mice in vivo and on primary astrocytes in vitro. In this study, we observed that curcumin significantly ameliorated myelin loss and reduced astrocyte activation in the corpus callosum (CC) region in mice induced with CPZ, and in primary astrocytes stimulated with lipopolysaccharide (LPS). Meanwhile, our research indicated that curcumin may exert neuroprotective effects in CPZ-induced mice by downregulating astrocyte-mediated inflammation by AXL. This study provides new insights into possible targeted therapies for MS.

Towards New Scaffolds for Antimicrobial Activity-In Silico/In Vitro Workflow Introducing New Lead Compounds

Background/Objectives: The rapid evolution of bacterial resistance and the high cost of drug development have attributed greatly to the dearth in drug design. Computational approaches and natural product exploitation offer potential solutions to accelerate drug discovery. Methods: In this research article, we aimed to identify novel antibacterial hits. For the in silico studies, molecular scaffolds from the in-house chemical library of the Department of Pharmacy of Athens (Pharmalab) and the National Cancer Institute (NCI) were screened and selected for further experimental procedures. Compounds from both libraries that were not previously screened for their antimicrobial properties were tested in vitro against Gram-positive and Gram-negative bacterial strains. The microdilution method was used to determine the minimum inhibitory concentrations (MICs). Results: In silico screening identified twenty promising molecules from the NCI and seven from the Pharmalab databases. The unexplored compounds for their antibacterial activity can be characterized as weak strain-specific antimicrobials. The NSC 610491 and NSC 610493 were active against Staphylococcus aureus (MIC: 25 and 12.5 µg/mL, respectively) and methicillin-resistant S. aureus (MRSA) (MIC: 50 and 12.5 µg/mL, respectively). Six out of seven hydroxytyrosol (HTy) compounds were moderately active (MIC: 25-50 µg/mL) against S. aureus, MRSA and Enterococcus faecalis. For the Gram-negative bacteria, no activity was detected (≥100 µg/mL). Conclusions: The tested scaffolds could be considered as promising candidates for novel antimicrobials with improvements. Further experimentation is required to assess mechanisms of action and evaluate the efficacy and safety.

Nanoparticle-based flavonoid therapeutics: Pioneering biomedical applications in antioxidants, cancer treatment, cardiovascular health, neuroprotection, and cosmeceuticals

Flavonoids, a type of natural polyphenolic molecule, have garnered significant research interest due to their ubiquitous nature and diverse biological activities, including antioxidant, anti-inflammatory, and anticancer effects, making them appealing to various scientific disciplines. In this regard, the use of a flavonoid nanoparticle delivery system is to overcome low bioavailability, bioactivity, poor aqueous solubility, systemic absorption, and intensive metabolism. Therefore, this review summarizes the classification of nanoparticles (liposomes, polymeric, and solid lipid nanoparticles) and the advantages of using nanoparticle-flavonoid formulations to boost flavonoid bioavailability. Moreover, this review illustrated the pioneering biomedical applications of nanoparticle-based flavonoid therapeutics, as well as safety and toxicity considerations of using a flavonoid nanoparticle delivery system.

Valorizing Agro‐Food Waste for Nutraceutical Development: Sustainable Approaches for Managing Metabolic Dysfunction‐Associated Steatotic Liver Disease and Related Co‐Morbidities

This comprehensive investigation delves into the interconnectedness of different features of cardiometabolic syndrome, such as metabolic dysfunction‐associated steatotic liver disease (MASLD), atherosclerotic cardiovascular disease (ASCVD), and gut dysbiosis, highlighting the crucial role of nutraceuticals in their management and prevention. Given the significant overlap in the pathophysiology of these conditions, the treatment with nutraceuticals, especially those derived from agro‐food waste, offers a promising, sustainable, and innovative approach to healthcare. The 2030 Agenda for Sustainable Development and the One Health concept are key frameworks for selecting the most interesting supply chain for the production of nutraceuticals from agro‐food waste, ensuring environmental sustainability, and innovative agricultural practices. In this review, the therapeutic potential of kiwifruit and apples has been explored, detailing how their bioactive compounds, like polyphenols, fiber, pectin, kaempferol, phloretin, and phlorizin, may contribute to the management of MASLD, ASCVD, and gut dysbiosis. Various extraction methods for active ingredients, including chemical, water, and enzyme extractions, are analyzed for their respective benefits and drawbacks. By integrating scientific research, sustainable agricultural practices, and innovative extraction methods, we can develop effective strategies to combat these pervasive health issues. This holistic approach not only enhances individual health outcomes but also supports broader environmental and societal goals, promoting a healthier future for all.

Comparative Investigation of Untargeted and Targeted Metabolomics in Turmeric Dietary Supplements and Rhizomes

In the present study, we analyzed the bioactive curcuminoids content in eight capsules (DS-1-DS-7 and DS-9), one tablet (DS-8), three ground turmeric samples (DS-10-DS-12), and three ground turmeric rhizomes (TR-1, TR-2, and TR-3). Initial screening with infrared and ultraviolet-visible spectroscopy coupled with a principal component analysis (PCA) revealed distinct differences between the samples analyzed. Hence, targeted and untargeted analyses were performed using ultra-high-performance liquid chromatography and gas chromatography coupled with mass spectrometry detections. The results show that the total curcuminoids content ranged from 1.3 to 69.8 mg/100 mg and the volatile component ranged from 0.7 to 9.1 mg/100 mg. The percentage ratio of the three prominent curcuminoids, bisdesmethoxycurcumin (BMC), desmethoxycurcumin (DMC), and curcumin (CUR), also varied remarkably compared to the expected ratio (BMC:DMC:CUR ratio of 1:2:6) described in the literature. The three prominent volatile compounds identified in most samples were ar-turmerone, turmerone, and curlone. The results demonstrated significant differences in the volatile compound levels among the DS and dried rhizome samples. The non-targeted analysis resulted in the identification of over 40 compounds, including bioactives such as piperine, phenolic acids, and amino acids. A disintegration study was performed on limited DS according to the United States Pharmacopeia protocol. The results reveal that all the selected DS samples passed the disintegration test. An analysis of curcuminoids from DS samples in neutral and acidic solutions demonstrated that all curcuminoids (BMC, DMC, and CUR) existed in the keto and enol forms and their concentrations changed with pH. This study will be of significant interest to manufacturers, consumers, and pharmacologists to accurately understand the bioactivities of three curcuminoids in different isomeric forms.

New low-dose curcumin derivative with therapeutic potential in Alzheimer's disease: Results from an in vitro and in vivo study in mice

Curcumin has been proposed as a potential treatment for Alzheimer's disease (AD) due to its ability to inhibit amyloid-β (Aβ) peptide aggregates and to destabilise pre-formed ones. Derivative 27 was synthesized to improve low-dose efficacy in the context of AD. Its anti-inflammatory, antioxidant and anti-amyloidogenic activities were evaluated in chemico, in vitro using AD and neuroinflammation cell models, and in vivo using the double-transgenic APP/PS1 mice. In vitro, this curcumin derivative significantly reduced nitric oxide (NO) production and levels of pro-inflammatory proteins, inducible NO synthase, pro-interleukin-1β (Pro-IL-1β) and cyclooxygenase-2. Furthermore, Derivative 27 activated nuclear factor erythroid 2-related factor 2 transcription factor (Nrf2) and significantly increased Nrf2 and heme-oxygenase-1 protein levels in the nucleus and in the cytoplasm, respectively. In one-year-old APP/PS1 mice, orally administered-Derivative 27 (50 mg/Kg/day) for 28 days improved spatial short-term memory and significantly decreased hippocampal Pro-IL-1β and amyloid precursor protein levels, as well as Aβ levels in the hippocampus and plasma. This study supports developing new chemical approaches to alter curcumin molecule, enabling lower doses, while increasing the effectiveness in AD treatment.

Progress in the study of curcumin metabolism in vivo

Curcumin has diverse biological functions, especially antioxidant and anti-inflammatory properties, but clinical trials have been hindered by its low bioavailability and pharmacokinetic properties. To achieve therapeutic efficacy, understanding curcumin's in vivo metabolism is crucial. We reviewed current research on curcumin metabolism in PubMed, Google Scholar, and CNKI. This article outlines curcumin's metabolic processes in the body via oral and intravenous injection. It suggests that upon entering the human body, curcumin may undergo oxidation, reduction, binding, and microbial community influence.

Progress in the Application of Multifunctional Composite Hydrogels in Promoting Tissue Repair

Tissue repair is an extremely complex process, and effectively promoting tissue regeneration remains a significant clinical challenge. Hydrogel materials, which exhibit physical properties closely resembling those of living tissues, including high water content, oxygen permeability, and softness, have the potential to revolutionize the field of tissue repair. However, the presence of various complex conditions, such as infection, ischemia, and hypoxia in tissue defects, means that hydrogels with simple structures and functions are often insufficient to meet the diverse needs of tissue repair. Researchers have focused on integrating multiple drugs, nanomaterials, bioactive substances, and stem cells into hydrogel matrices to develop novel multifunctional composite hydrogels for addressing these challenges, which have superior antibacterial properties, hemostatic abilities, self-healing capacities, and excellent mechanical properties. These composite hydrogels are designed to enhance tissue repair and have become an important direction in the current research. This review provides a comprehensive review of the recent advances in the application of multifunctional composite hydrogels in promoting tissue repair, including drug-loaded hydrogels, nanomaterial composite hydrogels, bioactive substance composite hydrogels, and stem cell composite hydrogels.

Flll32, a curcumin analog, improves adipose tissue thermogenesis

Adipose tissue is a key regulator of systemic energy homeostasis and improving adipose tissue function provides a brand-new theoretical reference for the prevention and treatment of obesity. FLLL32, a curcumin analog, can hinder various carcinogenic processes, however, its role in adipose tissue has not been fully elucidated. In this study, we observed that FLLL32 treatment significantly improved cold intolerance and reduced white adipose tissue (WAT) adipocyte size in mice, but had no effect on body weight and adipose tissues weight. Furthermore, FLLL32 treatment upregulated the expression level of uncoupling protein 1 and downregulated the expression level of peroxisome proliferator-activated receptor gamma in adipose tissue. Additionally, FLLL32 promoted the mRNA level of transferrin receptor protein 1, a key iron transporter on the cell membrane, and the lipid peroxidation in inguinal WAT. Finally, FLLL32 significantly inhibited the differentiation and maturation of preadipocytes. In summary, our results demonstrated that FLLL32 plays a crucial role in regulating adipose tissue function.

Effect of curcumin and three analogues on pre-osteoblast cells' viability, differentiation, and gene expression

Curcumin, found in turmeric rhizomes (Curcuma longa L.), has been widely studied for its potential health benefits, including anti-inflammatory, antioxidant, and wound-healing properties. However, due to its low bioavailability and unfavorable pharmacokinetics, analogous compounds have been developed to obtain better biopharmaceutical characteristics and enhanced biological effects. In this study, we evaluated the activity of curcumin and three of its synthetic analogues (DMAD, DMAM, and RI75) on the viability and differentiation of a pre-osteoblastic cell line (MC3T3-E1). We also assessed the expression of key genes involved in tissue regeneration: vascular endothelial growth factor (vegf), stromal-derived growth factor 1 (SDF-1/CXCL12), and runt-related transcription factor 2 (runx2). The cells were treated with curcumin and the three analogues at concentrations of 10, 30, or 50 μM. All tested analogues and curcumin exhibited moderate to no cell toxicity compared to the cells treated under standard conditions across all concentrations after 24, 48, and 72 hours. Only the RI75 analogue showed upregulation of SDF-1, a crucial factor in tissue regeneration. Compared to curcumin, the DMAM and RI75 analogues also upregulated runx2 and vegf, both associated with osteodifferentiation. The RI75 analogue demonstrated greater mineralization than curcumin, and both promoted more nodule formation than the untreated control. Our data suggest that the curcumin analogue RI75 at 50 μM presents similar toxicity but enhanced biological activity compared to natural curcumin, making it a promising substance for material biomodifications.

Patient-reported outcomes of curcumin supplementation in rheumatoid arthritis and psoriatic arthritis: a cross-sectional survey

Curcumin is suggested to possess potent anti-inflammatory properties. This study focuses on determining the prevalence and perceived efficacy of curcumin supplementation in rheumatoid arthritis (RA) and psoriatic arthritis (PsA) population. We conducted a cross-sectional study on patients with RA and PsA who visited a rheumatology outpatient clinic from October 2019 to March 2020. A brief, voluntary, and anonymous Qualtrics survey of specific questions regarding curcumin use, source, form, method, dosage, side effects, and perceived efficacy was distributed to the patients. Descriptive and correlation analyses were performed. Among the 291 patients included, 46.4% of patients reported taking curcumin supplementation. Majority patients supplemented once a day (53.4%) and took dosages ranging from less than 200 mg/day to around 1000 mg/day of curcumin. Pain scores decreased significantly after starting curcumin therapy (p < 0.0001). Patients who were taking curcumin for years reported better symptomatic control when compared with patients taking it for months (p 0.01), weeks (p 0.02), or days (p 0.02). There was a significant difference in symptom improvement in patients taking 200-1000 mg compared to patients taking less than 200 mg (p 0.01). Patients taking curcumin once or twice a day reported significant symptom improvement compared to patients taking it sporadically. Symptomatic improvement was reported as pain (35.7%), swelling (25%), stiffness (23.21%), and fatigue (16.07%). An interesting correlation exists between the symptom relief and the frequency, dosages (200-1000 mg), and duration (years) of curcumin supplementation. Our study indicates that curcumin supplementation positively influenced outcomes in 46.4% of individuals with RA and PsA, reducing pain, swelling, stiffness, and fatigue. This suggests curcumin's potential as an adjunct therapy for these conditions.

The pharmacokinetics and tissue distribution of curcumin following inhalation administration in rats-A comparative analysis with oral and intravenous routes

A sensitive and simple method using ultra-liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was developed and validated to determine the concentration of curcumin in rat plasma and tissue samples. Emodin was selected as the internal standard (IS), and biological samples were pretreated with simple one-step acetonitrile precipitation. The calibration curves exhibited linearity within the range of 1-1000 ng/ml for both rat plasma and tissue samples. The accuracy and precision of intra-day as well as inter-day determinations ranged from 99.3% to 117.3% and from 98.2% to 105.1%, respectively. This method demonstrated excellent recovery rates ranging from 76.4% to 96.4% along with minimal matrix effect ranging from 86.5% to 99.6%. The effectiveness of this method was successfully demonstrated through its application in an in vivo pharmacokinetic and tissue distribution study after single administration via inhalation (100 mg/kg), oral gavage (100 mg/kg) and intravenous injection (2.5 mg/kg) of curcumin in rats. The results revealed that inhalation significantly improved the bioavailability of curcumin, with most of the drug being deposited in the lung. These findings highlight inhalation as an effective route for targeted delivery of drugs directly into lung tissues, thus suggesting potential future applications for treating pulmonary diseases utilizing inhaled curcumin.

The effects of oral nutritional supplements on endometriosis-related pain: A narrative review of clinical studies

Endometriosis is a condition that can cause significant pain and discomfort for women, and the clinical and surgical treatments available have variable efficacy and can have adverse effects. These drawbacks often lead to poor adherence and therapeutic failure. Consequently, there has been increasing interest in the use of nutritional supplements as an adjuvant therapy for endometriosis. To facilitate clinical decision-making in managing women with endometriosis, a narrative review of clinical studies was conducted to investigate the effects of oral nutritional supplements on endometriosis-related pain. A literature search of the English-language PubMed/MEDLINE database was performed using appropriate keywords to identify clinical studies involving oral nutritional supplements and reporting on endometriosis-related pain. This narrative review included 20 studies published between 2013 and 2023, comprising 12 randomized controlled trials, six non-comparative trials, and two observational studies. The studies investigated the effects of various nutritional supplements on endometriosis-related pain, including vitamins, fatty acids, probiotics, medicinal plants, and bioactive compounds. A significant decrease in endometriosis-related pain was found in three out of five studies on vitamins, four out of six studies on fatty acids, one study on probiotics, two studies on medicinal plants, and five out of six studies on bioactive compounds. These nutritional supplements exhibited diverse biological activities, such as anti-inflammatory, antioxidant, antiproliferative, and antiangiogenic effects, all of which are relevant for managing endometriosis. These findings suggest that oral nutritional supplements could be included as part of a multidisciplinary treatment for endometriosis to decrease pain and enhance overall medical treatment.

A comprehensive and systematic review on Curcumin as a promising candidate for the inhibition of melanoma growth: From pre-clinical evidence to molecular mechanisms of action

BACKGROUND

Melanoma, a highly malignant skin tumor, can develop systemic metastases during the early stage. Several studies of melanoma animal models indicate that curcumin, a natural plant extract, inhibits melanoma growth through various mechanisms. To evaluate the relationships among different experimental conditions, curcumin itself, its derivatives, and special formulations, it is necessary to conduct a systematic review and meta-analysis.

PURPOSE

This meta-analysis aims to evaluate the potential of Curcumin as a drug for inhibiting the growth of melanoma and to determine the optimal dosage range and treatment duration for Curcumin administration.

METHODS

A systematic search of studies published from inception to December 2023 was conducted across six databases (PubMed, Web of Science, Embase, China National Knowledge Infrastructure, Wanfang Data, and VIP). Methodological quality was assessed using SYRCLE's RoB tool. Study heterogeneity was assessed using Cochran's Q test and I2 statistics. Publication bias risk was evaluated using a funnel plot. All analyses were performed using R (version 4.3.3). Additionally, three-dimensional effect analysis and machine learning techniques were utilized to determine the optimal dosage range and treatment duration for Curcumin administration.

RESULTS

Forty studies involving 989 animals were included. The results demonstrated that, relative to the control group, administration of Curcumin resulted in a significant reduction in tumor volume. [SMD=-3.44; 95 % CI (-4.25, -2.63); P<0.01; I2 = 79 %] and tumor weight [SMD=-1.93; 95 % CI (-2.41, -1.45); P<0.01; I2 = 75 %]. Additionally, Curcumin demonstrated a significant capacity to decrease the number of lung tumor nodules and microangiogenesis, as well as to extend survival time, in animal models. The results from three-dimensional effect analysis and machine learning emphasize that the optimal dosage range for Curcumin is 25-50 mg/kg, with an intervention duration of 10-20 days.

CONCLUSION

Curcumin can inhibit the growth of melanoma, and the dose-response relationship is not linear. However, further large-scale animal and clinical studies are required to confirm these conclusions.

Therapeutic Potential of Natural Compounds to Modulate WNT/β-Catenin Signaling in Cancer: Current State of Art and Challenges

Targeted therapies and immunotherapies have improved the clinical outcome of cancer patients; however, the efficacy of treatment remains frequently limited due to low predictability of response and development of drug resistance. Therefore, novel therapeutic strategies for various cancer types are needed. Current research emphasizes the potential therapeutic value of targeting WNT/β-catenin dependent signaling that is deregulated in various cancer types. Targeting the WNT/β-catenin signaling pathway with diverse synthetic and natural agents is the subject of a number of preclinical studies and clinical trials for cancer patients. The usage of nature-derived agents is attributed to their health benefits, reduced toxicity and side effects compared to synthetic agents. The review summarizes preclinical studies and ongoing clinical trials that aim to target components of the WNT/β-catenin pathway across a diverse spectrum of cancer types, highlighting their potential to improve cancer treatment.

Natural Deep Eutectic Solvents Combined with Supercritical Carbon Dioxide for the Extraction of Curcuminoids from Turmeric

BACKGROUND

Curcuminoids, the bioactive compounds found in turmeric, exhibit potent antioxidant, anti-inflammatory, and neuroprotective properties. This study aims to enhance the extraction of curcuminoids from turmeric using environmentally friendly solvents supercritical CO2 (scCO2) combined with natural deep eutectic solvents (NADESs) in one process, and to evaluate the resulting biological activity.

METHODS

A Box-Behnken statistical design was applied to optimize scCO2 extraction conditions-pressure, CO2 volume, and temperature-to maximize curcuminoid yield. Next, the menthol and lactic acid NADESs were selected, and these two solvents were combined into a single turmeric extraction process. The biological activity of the resulting extract was evaluated using antioxidant assays (ferric reducing antioxidant power and 2,2-diphenyl-1-picrylhydrazyl) and enzyme inhibition assays (acetylcholinesterase, butyrylcholinesterase, and tyrosinase). Toxicity assessments were conducted on the aquatic invertebrates Daphnia pulex, Artemia sp., and Chironomus aprilinus.

RESULTS

The most effective extraction was achieved using a menthol-lactic acid NADES as a cosolvent, integrated at a 1:20 ratio of plant material to NADESs while in combination with scCO2. The optimized scCO2-NADES extraction resulted in a high curcuminoid yield (33.35 mg/g), outperforming scCO2 extraction (234.3 μg/g), NADESs ultrasound-assisted extraction (30.50 mg/g), and alcohol-based solvents (22.95-26.42 mg/g). In biological assays, the extract demonstrated significant antioxidant activity and effective inhibition of enzymes (acetylcholinesterase, butyrylcholinesterase, and tyrosinase). Toxicity studies showed a concentration-dependent response, with EC50 for Chironomus aprilinus at the level of 0.098 μL/mL and Daphnia pulex exhibiting high sensitivity to the extract.

CONCLUSIONS

This study highlights the potential of combining NADESs and scCO2 extraction in one process, demonstrating the effectiveness of scCO2-NADES extraction in maximizing curcuminoid yield and enhancing bioactivity.

Comparative Pharmacokinetic Assessment of Curcumin in Rats Following Intratracheal Instillation Versus Oral Administration: Concurrent Detection of Curcumin and Its Conjugates in Plasma by LC-MS/MS

OBJECTIVE

To establish and validate an LC-MS/MS method for the simultaneous determination of curcumin (CUR) as well as its glucuronide conjugate (COG) and sulfate conjugate (COS) in rat plasma. The method was employed to evaluate and compare the pharmacokinetic behaviors of curcumin following oral and intratracheal administration in rats.

METHODS

Rat plasma samples were separated by chromatography on a C18 column after protein precipitation with acetonitrile. Gradient elution with a mobile phase of 0.5 mM ammonium acetate in acetonitrile was utilized. Mass spectrometry detection incorporated an electrospray ionization (ESI) source, multiple reaction monitoring (MRM), and dual-mode (positive and negative) scanning for quantitative analysis. A total of 12 SD rats were randomly divided into two groups and were orally (20 mg/kg) or intratracheally (10 mg/kg) administrated curcumin, respectively. CUR, COG, and COS concentrations in plasma were measured to assess pharmacokinetic disparities.

RESULTS

The method demonstrated linearity within the ranges of 2-400 ng/mL for CUR and COS and 5-1000 ng/mL for COG. Intratracheal administration significantly elevated CUR plasma concentrations compared to oral administration. The exposure of COG was higher than COS following oral administration. Conversely, intratracheal administration resulted in markedly higher COS exposure, with no significant difference in COG exposure after dose normalization between oral and inhalation routes.

CONCLUSIONS

The established LC-MS/MS method provides a reliable tool for the simultaneous measurement of CUR, COG, and COS in rat plasma, facilitating preclinical pharmacokinetic investigations. The study reveals distinct pharmacokinetic profiles for CUR following oral versus intratracheal administration, suggesting that inhalation may offer superior therapeutic efficacy.

Revolutionizing neurotherapeutics: Nanocarriers unveiling the potential of phytochemicals in Alzheimer's disease

Neurological disorders pose a huge worldwide challenge to the healthcare system, necessitating innovative strategies for targeted drug delivery to the central nervous system. Alzheimer's disease (AD) is an untreatable neurodegenerative condition characterized by dementia and alterations in a patient's physiological and mental states. Since ancient times, medicinal plants have been an important source of bioactive phytochemicals with immense therapeutic potential. This review investigates new and safer alternatives for prevention and treatment of disease related to inevitable side effects associated with synthetic compounds. This review examines how nanotechnology can help in enhancing the delivery of neuroprotective phytochemicals in AD. Nevertheless, despite their remarkable neuroprotective properties, these natural products often have poor therapeutic efficacy due to low bioavailability, limited solubility and imperfect blood brain barrier (BBB) penetration. Nanotechnology produces personalized drug delivery systems which are necessary for solving such problems. In overcoming these challenges, nanotechnology might be employed as a way forward whereby customized medication delivery systems would be established as a result. The use of nanocarriers in the design and application of important phytochemicals is highlighted by this review, which indicate potential for revolutionizing neuroprotective drug delivery. We also explore the complications and possibilities of using nanocarriers to supply nutraceuticals and improve patients' standard of living, and preclinical as well as clinical investigations displaying that these techniques are effective in mitigating neurodegenerative diseases. In order to fight brain diseases and improve patient's health, scientists and doctors can employ nanotechnology with its possible therapeutic interventions.

Role of Plant Phytochemicals: Resveratrol, Curcumin, Luteolin and Quercetin in Demyelination, Neurodegeneration, and Epilepsy

Polyphenols are an important group of biologically active compounds present in almost all food sources of plant origin and are primarily known for their anti-inflammatory and antioxidative capabilities. Numerous studies have indicated their broad spectrum of pharmacological properties and correlations between their increased supply in the human diet and lower prevalence of various disorders. The positive effects of polyphenols application are mostly discussed in terms of cardiovascular system well-being. However, in recent years, they have also increasingly mentioned as prophylactic and therapeutic factors in the context of neurological diseases, being able to suppress the progression of such disorders and soothe accompanying symptoms. Among over 8000 various compounds, that have been identified, the most widely examined comprise resveratrol, curcumin, luteolin and quercetin. This review focuses on in vitro assessments, animal models and clinical trials, reflecting the most actual state of knowledge, of mentioned polyphenols' medicinal capabilities in epilepsy, demyelinating and neurodegenerative diseases of the central nervous system.

Effect of high mobility group box 1 pathway inhibition on gene expression in the prefrontal cortex of mice exposed to alcohol

INTRODUCTION

The high mobility group box 1 (HMGB1) pathway plays a pivotal role in the development of alcohol-induced brain injury. Glycyrrhizinic acid (GlyA) is widely regarded as an inhibitor of HMGB1. The objective is to investigate the impact on gene expression in the prefrontal cortex,we sequenced the transcriptome in control, alcohol-exposed, and HMGB1-inhibited groups of mice. We verified our findings by real-time quantitative PCR (qRT-PCR).

METHODS

An alcohol exposure model was established in mice by intraperitoneal injection of alcohol. Transcriptome sequencing and bioinformatics analyses were performed on prefrontal cortex tissue. Kyoto Encyclopedia of Genes and Genomes analysis was performed to identify pivotal pathways of differentially expressed genes. The role of relevant genes was verified by qRT-PCR.

RESULTS

Expression of genes involved in the neuroactive ligand-receptor interaction pathway exhibited an increase in mice from the alcohol-exposed group.However, there were no significant differences observed in the expression of these genes between control and those receiving an intraperitoneal injection of alcohol along with a HMGB1 inhibitor. Mice in the alcohol-exposed group showed increased gene expression of Cysltr2, Chrna6, Chrna3, Chrnb4, and Pmch. Expression of these genes was decreased in mice injected with HMGB1 inhibitor.

SIGNIFICANCE

Our study demonstrates that alcohol primarily influences gene expression in the prefrontal cortex of mice through the neuroactive ligand-receptor interaction pathway. HMGB1 inhibitor effectively inhibited the expression of this pathway. This study provides a novel route for drug development in alcohol-induced brain injury.

Improving curcumin bioavailability: Targeted delivery of curcumin and loading systems in intestinal inflammation

Curcumin is a natural food ingredient and has the potential to alleviate inflammation and combat cancer. The incidence of intestinal inflammation has been increasing and poses a severe risk to human health. Due to low absorption and bioavailability, curcumin's anti-inflammatory ability is ineffective. To improve the bioavailability of curcumin, descriptions of the intestinal barrier, signaling pathways, and transport mechanisms are reviewed. Blocking the signaling pathways lowers the number of inflammatory cytokines produced, which is the primary mechanism by which curcumin relieves inflammatory symptoms. The bioavailability of curcumin is not only related to physicochemical properties but also to the nature of the carrier material. Environmental indicators also have an impact on the improvement of curcumin bioavailability in applications. There is a need to develop multifunctional and more stable nanomaterial targeting systems to improve curcumin bioavailability and achieve better results in nanotechnology research and targeted inflammation therapy.

Turmeric products: Evaluation of curcumin and trace elements

Turmeric (Curcuma longa L.) is valued for its coloring properties, flavor enhancement, functionality, as well as antioxidant and anti-inflammatory effects, which help prevent various diseases. This study aimed to evaluate the levels of curcumin and trace elements (Cr, Co, Ni, As, Mo, Cd, Sb, Ba, Hg, and Pb) in 30 samples of turmeric capsules. The quantification of curcumin was performed by spectrophotometry, with results ranging from 0.03 g/100 g to 37.6 g/100 g. The concentration of trace elements was determined by ICP-MS after acid digestion of the samples. Except for the elements Sb and Hg, which showed levels below the quantification limits (0.002 and 0.008 mg/kg, respectively), the results were: Cr (<0.008-0.083 mg/kg), Co (<0.003-0.78 mg/kg), Ni (<0.008-1.61 mg/kg), As (<0.003-0.083 mg/kg), Mo (<0.008-1.21 mg/kg), Cd (<0.002-0.076 mg/kg), Ba (<0.008-23.48 mg/kg), and Pb (<0.008-0.619 mg/kg). The interaction between curcumin and the trace elements was complex, with no direct relationship found between them. The estimated daily intake (EDI) of curcumin varied from 0.004 to 2.684 mg/kg of body weight, with 13 samples below 10 % of the acceptable daily intake (ADI), 12 samples between 10 % and 50 % of the ADI, and three samples above 50 %. For trace elements, Co showed the highest contribution, corresponding to 2.72 % of the health-based guidance value established by EFSA. A careful approach in marketing turmeric-based products is fundamental to ensure their quality, efficacy, and safety for consumers.

In vitro anthelmintic activity of Phyllanthus niruri Linn., Andrographis paniculata, Curcuma xanthorrhiza Roxb., and Curcuma aeruginosa Roxb. ethanol extracts on the motility and cuticle damage of Ascaridia galli

Background and Aim

Ascaridia galli, a nematode that frequently infects the digestive tract of chickens, is a significant concern for poultry health. In response, the use of medicinal plant-derived anthelmintics was proposed as a potential solution. This study observed the in vitro effectiveness of a single, graded dose of the ethanol extract of Andrographis paniculata, Phyllanthus niruri L., Curcuma xanthorrhiza Roxb., and Curcuma aeruginosa Roxb. on the movement activity of adult A. galli every hour for 6 h, followed by an analysis of worm cuticle damage in A. galli.

Materials and Methods

A randomized block design was used. Adult A. galli were collected from the intestinal lumen of fresh free-range chickens. Each petri dish contained two A. galli for each treatment with three replications. Each plant extract (A. paniculata, P. niruri L., C. xanthorrhiza Roxb., and C. aeruginosa Roxb.) was evaluated with three distinct doses, which were 250 μg/mL, 500 μg/mL, and 1000 μg/mL; 0.9% sodium chloride solution was used as a negative control, and 500 μg/mL Albendazole solution was used as a positive control. The active compound content of A. paniculata, P. niruri L., C. xanthorrhiza Roxb., and C. aeruginosa Roxb. extracts were analyzed using ultra-performance liquid chromatography-mass spectrometry. The movement activity of A. galli was determined by the percentage score value from the 1st to the 6th h in each treatment group, followed by analysis of damage to the A. galli cuticle layer using a nano-microscope and histopathological images.

Results

Analysis of variance demonstrated that at doses of 250 μg/mL and 500 μg/mL, the ethanol extracts of A. paniculata, P. niruri L., C. xanthorrhiza Roxb., and C. aeruginosa Roxb. did not have a significant effect on the effectiveness of A. galli's motility (>0.005). However, at a dose of 1000 μg/mL, the ethanol extract of A. paniculata, P. niruri L., C. xanthorrhiza Roxb., and C. aeruginosa Roxb. reduced the motility of A. galli. Importantly, the motility of A. galli in the dose of 1000 μg/mL A. paniculata and P. niruri L. extract groups was very weak and significantly different (p < 0.001) compared to the negative control group. The content of the active compound Andrographolide in the ethanol extract of A. paniculata and the active compound 5-Methoxybenzimidazole in the extract of P. niruri L. are strongly suspected to play an important role in damaging and shedding the cuticle layer of A. galli.

Conclusion

All herbal extracts have anthelmintic activity at a concentration of 1000 μg/mL. Extracts of A. paniculata, P. niruri L., C. xanthorrhiza Roxb., and C. aeruginosa Roxb. have activities that can damage and dissolve the cuticle layer of A. galli, resulting in the weakening of the motility of A. galli.

The effect of curcumin-piperine supplementation on lipid profile, glycemic index, inflammation, and blood pressure in patients with type 2 diabetes mellitus and hypertriglyceridemia

Type 2 diabetes mellitus (T2DM) is a metabolic disorder associated with insulin resistance and ensuing dysglycemia, dyslipidemia, and inflammation. Owing to the putative metabolic benefits of curcumin-piperine combination, we explored the efficacy of this combination in improving cardiometabolic indices of patients with T2DM and hypertriglyceridemia. In this double-blind clinical trial, 72 patients with T2DM and hypertriglyceridemia were randomized to receive either a tablet containing 500 mg of curcuminoids plus 5 mg of piperine, or a matched placebo for 12 weeks. Anthropometric indices, blood pressure, glycemic indices, lipid profile, C-reactive protein (CRP), quality of life, and mood were evaluated at baseline and end of the study. After 12 weeks of intervention, the levels of triglycerides (p-value = 0.001) and fasting blood glucose (p-value = 0.004) were significantly reduced in the curcumin-piperine compared with the placebo group. CRP levels were marginally reduced in the curcumin-piperine compared with the placebo group (p-value = 0.081). In addition, energy/fatigue significantly increased in the curcumin-piperine group compared to the control group (p-value = 0.024). However, between-group comparisons showed no significant change in other parameters, including anthropometric indices (waist circumference and body mass index (BMI)), biochemical parameters (low-density lipoprotein (LDL-c), high-density lipoprotein (HDL-c), and insulin), HOMA-IR, blood pressure, quality of life, and DASS-21 items between the studied groups (p-value >0.05). The current study showed that curcumin-piperine supplementation can improve serum CRP, triglycerides, and glucose concentrations in patients with T2DM and hypertriglyceridemia.

Curcumin and nanodelivery systems: New directions for targeted therapy and diagnosis of breast cancer

As the global incidence of breast cancer continues to surge, the pursuit of novel, low-toxicity, and highly efficacious therapeutic strategies has emerged as a pivotal research focus. Curcumin (CUR), an active constituent of traditional Chinese medicine (TCM) renowned for its antimicrobial, anti-inflammatory, antioxidant, and antitumor properties, exhibits immense potential in breast cancer therapy. Nevertheless, CUR's poor water solubility, chemical instability, and unfavorable pharmacokinetics have impeded its clinical utilization. To address these challenges, nano-delivery systems have been extensively exploited for CUR administration, enhancing its in vivo stability and bioavailability, and facilitating precise targeting of breast cancer lesions. Therefore, we elaborate on CUR's chemical foundations, drug metabolism, and safety profile, and elucidate its potential mechanisms in breast cancer therapy, encompassing inducing apoptosis and autophagy, blocking cell cycle, inhibiting breast cancer metastasis, regulating tumor microenvironment and reversing chemotherapy resistance. The review primarily emphasizes recent advancements in CUR-based nano-delivery systems for the treatment and diagnosis of breast cancer. Liposomes, nanoparticles (encompassing polymer nanoparticles, solid lipid nanoparticles, mesoporous silica particles, metal/metal oxide nanoparticles, graphene nanomaterials, albumin nanoparticles, etc.), nanogels, and nanomicelles can serve as delivery carriers for CUR, exhibiting promising anti-breast cancer effects in both in vivo and in vitro experiments. Furthermore, nano-CUR can be integrated with fluorescence imaging, magnetic resonance imaging, computed tomography imaging, ultrasound, and other techniques to achieve precise localization and diagnosis of breast cancer masses. While this article has summarized the clinical studies of nano-curcumin, it is noteworthy that the research literature on nano-CUR applied to breast cancer diagnosis and the translation of nano-CUR clinical studies in BC patients remain limited. Therefore, future research should intensify exploration in this direction.

Investigating the impact of nanoemulsion of curcumin-loaded olive oil on growth performance, feed utilization, immunological responses, and redox status of Litopenaeus vannamei shrimp with emphasis on economic efficiency of supplementation

The trail aimed to explore the effect of dietary supplementation of curcumin loaded olive oil nanoemulsion (CUR-OLNE) on growth performance, feed utilization, blood biochemical, redox status, and immune response of Litopenaeus vannamei shrimp, considering the economic efficiency of supplementation. A total of 280 healthy shrimps (3.42 ± 0.02 g) were randomly distributed into five equal groups and were fed diets containing 0 (CUR-OLNE0), 5(CUR-OLNE5), 10(CUR-OLNE10), 15(CUR-OLNE15) and 20 (CUR-OLNE20) mg CUR-OLNE/kg diet, respectively for 16 weeks. Among CUR-OLNE treated groups, CUR-OLNE20 showed the highest growth performance and feed utilization traits, including final body weight, specific growth rate, feed conversion ratio, and protein efficiency ratio. Notably, the photomicrographs provided further compelling evidence regarding the potential effect of CUR-OLNE supplementation on muscle structure and integrity. Compared to the control, the levels of blood protein significantly induced in CUR-OLNE15 and CUR-OLNE20 treated groups (p < 0.05). All CUR-OLNE -supplemented groups possessed lower activities of liver enzymes as well as the levels of urea and creatinine compared to the control (p < 0.05). The addition of 20 mg CUR-OLNE/kg diet decreased the concentrations of cortisol, glucose and triglycerides. The dietary treatment significantly improved the secretion of digestive enzymes, including amylase, lipase, and protease. The lowest levels of Malondialdehyde and the highest levels of total antioxidant capacity, super oxide dismutase, catalase, lysozyme and immunoglobulin M were detected in both of CUR-OLNE15, and CUR-OLNE20 treated groups compared to the control (p < 0.05). There were considerable significant effects of dietary supplementation of CUR-OLNE on economic efficiency. In conclusion, the application of nanocarriers for the delivery of dietary immune stimulants such as CUR-OLNE to Litopenaeus vannamei shrimp is a promising strategy for improving shrimp nutrition. The addition of 20 mg CUR-OLNE/kg to the diets of can be recommended as an affective intervention to improve growth performance, feed utilization, and health status of shrimp. Implementing this intervention can maximize the economic efficiency of shrimp farming while promoting sustainable practices in the industry.

The anti-obesity effects of polyphenols: a comprehensive review of molecular mechanisms and signal pathways in regulating adipocytes

Excess weight gain is a growing concern worldwide, fueled by increased consumption of calorie-dense foods and more sedentary lifestyles. Obesity in China is also becoming increasingly problematic, developing into a major public health concern. Obesity not only increases the risk of associated disease but also imposes a burden on health care systems, and it is thus imperative that an effective intervention approach be identified. Recent studies have demonstrated that the polyphenol-rich Mediterranean diet has considerable potential in this regard. Polyphenols can inhibit the production of adipocytes and reduce adverse reactions, such as inflammation, insulin resistance, and gut microflora imbalance. In this review, we examine four polyphenols (curcumin, ellagic acid, ferulic acid, and quercetin) in terms of their potential as interventions targeting obesity. The mechanisms that help promote adipocyte browning, increase thermogenic factors, increase thermogenesis, and regulate adipocyte differentiation are summarized, and key signaling pathways, including PPARγ, C/EBP-, and others, are reviewed.

Curcumin Administration Routes in Breast Cancer Treatment

Breast cancer is a public health concern worldwide, characterized by increasing incidence and mortality rates, requiring novel and effective therapeutic strategies. Curcumin is a bioactive compound extracted from turmeric with several pharmacological activities. Curcumin is a multifaceted anticancer agent through mechanisms including the modulation of signaling pathways, inhibition of cell proliferation, induction of apoptosis, and production of reactive oxygen species. However, the poor water solubility and bioavailability of curcumin create important barriers in its clinical application. This review elaborates on the therapeutic potential of curcumin in breast cancer treatment, focusing on the efficacy of different administration routes and synergistic effects with other therapeutic agents. The intravenous administration of curcumin-loaded nanoparticles significantly improves bioavailability and therapeutic outcomes compared to oral routes. Innovative formulations, such as nano-emulsifying drug delivery systems, have shown promise in enhancing oral bioavailability. While intravenous delivery ensures higher bioavailability and direct action on tumor cells, it is more invasive and expensive than oral administration. Advancing research on curcumin in breast cancer treatment is essential for improving therapeutic outcomes and enhancing the quality of life of patients.

Effect of curcumin on physico-mechanical properties of heat polymerized denture base resin

PURPOSE

Current denture base resins lack adequate strength and antimicrobial properties, necessitating the exploration of alternative solutions. The purpose of this study was to evaluate the effects of curcumin incorporation on the physico-mechanical properties of heat-cured denture base resin, filling a gap in the literature regarding this correlation.

METHODS

Heat-cured denture base resin was supplemented with increasing concentrations of curcumin (CR). Groups were designated as CR-0 (0%), CR-0.05 (0.05%), CR-0.10 (0.10%), CR-0.50 (0.50%), and CR-1 (1%), based on the increasing concentrations of curcumin incorporated into the material. Physico-mechanical properties, including flexural strength, surface roughness, fracture toughness, impact strength, and color difference, were evaluated following the testing standards. Statistical analysis involved Kruskal-Wallis ANOVA followed by Dunn's test for multiple comparisons, with significance set at P ≤ 0.05 and Bonferroni's correction applied to p-values.

RESULTS

Flexural strength peaked at 153.80 MPa in the CR-0.10 group, while surface roughness was lowest at 0.14 micrometers in the CR-0.50 group. Fracture toughness reached its highest value at 1.80 kJ/m^2 in the CR-0.05 group, and impact strength was greatest at 6.52 Joules in the CR-0.05 group. Additionally, color difference was least pronounced in the CR-0.50 group. Flexural strength, surface roughness, fracture toughness, impact strength, and color difference varied significantly among the control group and different curcumin concentrations (P < 0.05).

CONCLUSIONS

Incorporating curcumin into denture base resin alters both optical and mechanical properties. Further research is required to validate the findings and determine the optimal curcumin concentration without compromising the material efficacy.

Curcumin-encapsulated glucan nanoparticles as an oxidative stress modulator against human hepatic cancer cells

In Hepatitis B patients, the virus targets liver cells, leading to inflammation and liver damage, which can result in severe complications such as liver failure, cirrhosis, and liver cancer. Therapeutic options for liver disease are currently limited. Curcumin, a polyphenol with potential protective effects against chronic diseases like cancer, suffers from poor water solubility, restricting its pharmacological applications. This study explores the encapsulation of curcumin in glucan nanoparticles (NPs) and its impact on oxidative stress in liver cancer cells. Two sizes of curcumin-loaded glucan NPs, GC111 (111 nm) and GC398 (398 nm), were produced with nearly 100 % encapsulation efficiency. Cytotoxicity studies revealed that particle size influences the extent of observed effects, with GC111 NPs causing a greater reduction in cell viability. Additionally, the smaller GC111 NPs demonstrated a higher capacity to induce oxidative stress in cancer cells by stimulating the production of ROS, NO, and the chemokine RANTES in a concentration-dependent manner. These findings suggest that the smaller GC111 NPs are promising candidates for future studies aimed at evaluating oxidative stress-induced tumor cell death mechanisms.

The Association Between Anti-Neoplastic Effects of Curcumin and Urogenital Cancers: A Systematic Review

Background: Curcumin is a polyphenol compound with anticancer effects. We aimed to review the anti-neoplastic effects of curcumin on urogenital cancers, by regulating different microRNA expressions. Methods: A systematic search was conducted in Medline (PubMed), Embase, Scopus, and Web of Science up to the end of August 2024. All English, in vitro, and observational studies that evaluated the effect of curcumin on preventing or treating urogenital cancers through its impact on microRNA expression were included. In vivo or silico studies were excluded. Result: A total of 2549 records were found. Finally, 25 studies were included. Twelve studies assessed the effect of curcumin on prostate cancer, six studies on ovarian cancer, three studies on cervical cancer, three studies on bladder cancer, and one study on renal cancer. MicroRNAs are small noncoding RNAs that regulate the post-transcriptional pathways. They possess pivotal roles in different fundamental mechanisms in cells such as differentiation, migration, apoptosis, and proliferation. Curcumin exerts its anticancer effects on urogenital neoplasms by upregulating tumor suppressor microRNAs (miR-143, miR-145, miR-Let-7, miR-101, miR-3127, miR-3178, miR-1275, miR-3198, miR-1908, miR-770, miR-1247, miR-411, miR-34a, miR-383, miR-708, miR-483, miR-199a, miR-335, miR-503, miR-10b, miR-551a, miR-9, miR-203, miR-7110, miR-29b, and miR-126) and downregulating oncogenic microRNAs (miR-21, miR-210, miR-382, miR-654, miR-494, miR-193b, miR-671, miR-222, miR-23b, miR-664, miR-183, miR-214, miR-320a, miR-23a, miR-30a, miR-320d, miR-1285, miR-32, miR-181a, miR-205, miR-216a, miR-1246, and miR-106b). Conclusion: Cell proliferation is inhibited, and cell apoptosis is induced by curcumin in different urogenital cancers through suppressing oncogenic microRNAs or provoking tumor suppressor microRNAs.

Biocompatible Poly(ε-Caprolactone) Nanocapsules Enhance the Bioavailability, Antibacterial, and Immunomodulatory Activities of Curcumin

Curcumin (Cur), the primary curcuminoid found in Curcuma longa L., has garnered significant attention for its potential anti-inflammatory and antibacterial properties. However, its hydrophobic nature significantly limits its bioavailability. Additionally, adipose-derived stem cells (ADSCs) possess immunomodulatory properties, making them useful for treating inflammatory and autoimmune conditions. This study aims to verify the efficacy of poly(ε-caprolactone) nanocapsules (NCs) in improving Cur's bioavailability, antibacterial, and immunomodulatory activities. The Cur-loaded nanocapsules (Cur-NCs) were characterized for their physicochemical properties (particle size, polydispersity index, Zeta potential, and encapsulation efficiency) and stability over time. A digestion test simulated the behavior of Cur-NCs in the gastrointestinal tract. Micellar phase analyses evaluated the Cur-NCs' bioaccessibility. The antibacterial activity of free Cur, NCs, and Cur-NCs against various Gram-positive and Gram-negative strains was determined using the microdilution method. ADSC viability, treated with Cur-NCs and Cur-NCs in the presence or absence of lipopolysaccharide, was analyzed using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide assay. Additionally, ADSC survival was assessed through the Muse apoptotic assay. The expression of both pro-inflammatory (interleukin-1β and tumor necrosis factor-α) and anti-inflammatory (IL-10 and transforming growth factor-β) cytokines on ADSCs was evaluated by real-time polymerase chain reaction. The results demonstrated high stability post-gastric digestion of Cur-NCs and elevated bioaccessibility of Cur post-intestinal digestion. Moreover, Cur-NCs exhibited antibacterial activity against Escherichia coli without affecting Lactobacillus growth. No significant changes in the viability and survival of ADSCs were observed under the experimental conditions. Finally, Cur-NCs modulated the expression of both pro- and anti-inflammatory cytokines in ADSCs exposed to inflammatory stimuli. Collectively, these findings highlight the potential of Cur-NCs to enhance Cur's bioavailability and therapeutic efficacy, particularly in cell-based treatments for inflammatory diseases and intestinal dysbiosis.

Targeting the autophagy-miRNA axis in prostate cancer: toward novel diagnostic and therapeutic strategies

Since prostate cancer is one of the leading causes of cancer-related death, a better understanding of the molecular pathways guiding its development is imperative. A key factor in prostate cancer is autophagy, a cellular mechanism that affects both cell survival and death. Autophagy is essential in maintaining cellular homeostasis. Autophagy is a physiological mechanism wherein redundant or malfunctioning cellular constituents are broken down and recycled. It is essential for preserving cellular homeostasis and is implicated in several physiological and pathological conditions, including cancer. Autophagy has been linked to metastasis, tumor development, and treatment resistance in prostate cancer. The deregulation of miRNAs related to autophagy appears to be a crucial element in the etiology of prostate cancer. These miRNAs influence the destiny of cancer cells by finely regulating autophagic mechanisms. Numerous investigations have emphasized the dual function of specific miRNAs in prostate cancer, which alter autophagy-related pathways to function as either tumor suppressors or oncogenes. Notably, miRNAs have been linked to the control of autophagy and the proliferation, apoptosis, and migration of prostate cancer cells. To create customized therapy approaches, it is imperative to comprehend the dynamic interplay between autophagy and miRNAs in prostate cancer. The identification of key miRNAs provides potential diagnostic and prognostic markers. Unraveling the complex network of lncRNAs, like PCA3, also expands the repertoire of molecular targets for therapeutic interventions. This review explores the intricate interplay between autophagy and miRNAs in prostate cancer, focusing on their regulatory roles in cellular processes ranging from survival to programmed cell death.

Is oral nano-curcumin formulation a safe and effective measure for preventing cisplatin-induced nephrotoxicity in cancer patients?

Nephrotoxicity is one of the most important complications in cancer patients under treatment with cisplatin-containing regimens. Curcumin, as the most important active component of Curcuma longa, is an antioxidant and anti-inflammatory compound. In this clinical trial, we assessed the preventive effect of nano-curcumin oral formulation against cisplatin-induced nephrotoxicity in cancer patients. In this triple-blind clinical trial 30 cancer patients on cisplatin were randomly included in the treatment group, receiving nano-curcumin 40 mg capsules ( n  = 15) or the placebo group ( n  = 15) twice a day during four chemotherapy courses. Kidney function was measured at the beginning of the study and then at the end of each course of chemotherapy. There was no significant difference in acute kidney injury occurrence rate and creatinine and blood urine nitrogen serum levels between the treatment and placebo groups at the end of each chemotherapy course ( P value >0.05). Just at the end of the first course, the difference was close to significant ( P  = 0.055). We also found no difference in mortality and recurrence rate in an average 30-month follow-up. Nano-curcumin in the prescribed dose and duration was not effective in preventing cisplatin-induced nephrotoxicity in cancer patients in comparison with the placebo. Further studies with larger sample size using different doses and duration of nano-curcumin are recommended.

Chitosan-carrageenan microbeads containing nano-encapsulated curcumin: Nano-in-micro hydrogels as alternative-therapeutics for resistant pathogens associated with chronic wounds

Antimicrobial resistance is an issue of global relevance for the treatment of chronic wound infections. In this study, nano-in-micro hydrogels (microbeads) of chitosan and κ-carrageenan (CCMBs) containing curcumin-loaded rhamnosomes (Cur-R) were developed. The potential of Cur-R-CCMBs for improving the antibacterial activity and sustained release of curcumin was evaluated. Curcumin-loaded rhamnosomes (rhamnolipids functionalized liposomes) had a mean particle size of 116 ± 7 nm and a surface-charge of -24.5 ± 9.4 mV. The encapsulation efficiency of curcumin increased from 42.83 % ± 0.69 % in Cur-R to 95.24 % ± 3.61 % respectively after their embedding in CCMBs. SEM revealed smooth surface morphology of Cur-R-CCMBs. FTIR spectroscopy confirmed the presence of weak electrostatic and hydrophobic interactions among curcumin, rhamnosomes, and microbeads. Cur-R-CCMBs had demonstrated significant antibacterial activity against multi-drug resistant chronic wound pathogens including Staphylococcus aureus and Pseudomonas aeruginosa. Cur-R-CCMBs also exhibited significantly higher anti-oxidant (76.85 % ± 2.12 %) and anti-inflammatory activity (91.94 % ± 0.41 %) as well as hemocompatibility (4.024 % ± 0.59 %) as compared to pristine microbeads. In vivo infection model of mice revealed significant reduction in the viable bacterial count of S. aureus (∼2.5 log CFU/mL) and P. aeruginosa (∼2 log CFU/mL) for Cur-R-CCMBs after 5 days. Therefore, nano-in-micro hydrogels can improve the overall efficacy of hydrophobic antimicrobials to develop effective alternative-therapeutics against resistant-pathogens associated with chronic wound infections.

Visible light potentiates rapid cell destruction and death by curcumin in vitro

Curcumin, a small molecule derived from the plant Curcuma longa, is a pleiotropic agent with widely varying pharmacological activities attributed to it. In addition to its anti-cancer activity curcumin is also known to be cytotoxic upon photoactivation. Time-lapse DIC and correlative fluorescence microscopy were used to evaluate the effects of curcumin, combined with continuous exposure to visible light, on cellular components of RTG-2 cells. Curcumin combined with visible light resulted in rapid and dramatic destruction of cells. F-actin and microtubule cytoskeletons were drastically altered, both showing fragmentation and overall loss from cells. Nuclei exhibited granulated nucleoplasm, condensed DNA, and physical shrinkage. Mitochondria rapidly fragmented along their length and disappeared from cells. Plasma membrane was breached based on lipophilic dye staining and the entrance of otherwise impermeant small molecules into the cell. Grossly distorted morphology hallmarked by significant swelling and coarse granulation of the cytoplasm was consistently observed. All of these effects were dependent on visible light as the same cellular targets in curcumin-treated cells outside the illuminated area were always unperturbed. The combination of curcumin and continuous exposure to visible light enables rapid and irreversible cellular destruction which can be monitored in real-time. Real-time monitoring of this structural disintegration suggests a new approach to applying curcumin in photodynamic treatments, where the progression of cell and tissue destruction might be simultaneously evaluated through optical means.

Causal relationship between fertility nutrients supplementation and PCOS risk: a Mendelian randomization study

Background

Polycystic ovary syndrome (PCOS), a prevalent endocrine disorder in women of reproductive age, is mainly ameliorated through drugs or lifestyle changes, with limited treatment options. To date, numerous researchers have found that fertility nutrient supplements may benefit female reproductive health, but their direct impact on polycystic ovary syndrome risk remains unclear.

Methods

Our research employs Mendelian Randomization to assess how fertility nutrients affect PCOS risk. Initially, we reviewed 49 nutrients and focused on 10: omega-3 fatty acids, calcium, dehydroepiandrosterone, vitamin D, betaine, D-Inositol, berberine, curcumin, epigallocatechin gallate, and metformin. Using methodologies of Inverse Variance Weighting and Mendelian Randomization-Egger regression, we examined their potential causal relationships with PCOS risk.

Results

Our findings indicate omega-3 fatty acids reduced PCOS risk (OR=0.73, 95% CI: 0.57-0.94, P=0.016), whereas betaine increased it (OR=2.60, 95% CI: 1.09-6.17, P=0.031). No definitive causal relations were observed for calcium, dehydroepiandrosterone, vitamin D, D-Inositol, and metformin (P>0.05). Drug target Mendelian Randomization analysis suggested that increased expression of the berberine target gene BIRC5 in various tissues may raise PCOS risk (OR: 3.00-4.88; P: 0.014-0.018), while elevated expressions of curcumin target gene CBR1 in Stomach and epigallocatechin gallate target gene AHR in Adrenal Gland were associated with reduced PCOS risk (OR=0.48, P=0.048; OR=0.02, P=0.018, respectively).

Conclusions

Our research reveals that specific fertility nutrients supplementation, such as omega-3 fatty acids, berberine, and curcumin, may reduce the risk of PCOS by improving metabolic and reproductive abnormalities associated with it.