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International Journal of Dental Hygiene Feb 2022The purpose of the present systematic review and meta-analysis was to assess the available evidence regarding the efficacy of curcumin mouthwashes on plaque and... (Meta-Analysis)
Meta-Analysis Review
OBJECTIVES
The purpose of the present systematic review and meta-analysis was to assess the available evidence regarding the efficacy of curcumin mouthwashes on plaque and gingivitis.
METHODS
A comprehensive online search of multiple databases (PubMed, Scopus, Web of Science, and Google Scholar) was performed to identify all relevant studies published up to August 2020, using the following keywords: curcumin, turmeric, gingivitis, periodontal health, and plaque control. All clinical trials that compared the efficacy of curcumin mouthwash with chlorhexidine in controlling dental plaque and gingivitis were included. Data were analysed using Review Manager (RevMan) 5.3 software. The risk of bias was evaluated by two independent reviewers using the Cochrane assessment tool.
RESULTS
Six randomized clinical trials (comprising 320 subjects) fulfilled the eligibility criteria. Five studies showed a high risk of bias and only one study showed a low risk of bias. The pooled data of the six included studies revealed comparable efficacy of curcumin and chlorhexidine in reducing dental plaque (I = 91%; standardized mean difference [SMD]: 0.27, 95% CI: -0.53, 1.07, p = 0. 51) and gingival inflammation (I = 40%; SMD: -0.13, 95% CI: -0.35, 0.09, p = 0.24), with no statistically significant differences between the two groups.
CONCLUSION
The results suggest that curcumin mouthwashes have promising anti-plaque and anti-gingivitis properties. Further clinical trials with adequate sample sizes and standardized methodologies are required to discern the efficacy of curcumin mouthwash in reducing plaque and gingivitis.
Topics: Anti-Infective Agents, Local; Chlorhexidine; Curcumin; Dental Plaque; Dental Plaque Index; Gingivitis; Humans; Mouthwashes
PubMed: 34013606
DOI: 10.1111/idh.12518 -
International Ophthalmology Apr 2018Proliferative vitreoretinopathy in the inferior retina remains clinically challenging. Heavier-than-water intraocular tamponades have been developed to improve inferior... (Review)
Review
PURPOSE
Proliferative vitreoretinopathy in the inferior retina remains clinically challenging. Heavier-than-water intraocular tamponades have been developed to improve inferior tamponading properties, and their chemical compositions have been substantially improved over the years, in parallel with developments in vitrectomy instrumentation and surgical techniques. Herein we present an updated review of the clinical use of standard formulations and HSO, focusing on analysis of the intraocular inflammation associated with endotamponade agents, and comparison of the adverse effects of these agents on the physical and biological properties of the eye.
METHODS
A detailed literature search was conducted on PubMed, EMBASE, Cochrane Library, and Google Scholar using the key words. Fifty-eight articles matched our inclusion criteria that were included in this systematic review.
RESULTS
Perfluorocarbon liquids and partially fluorinated alkanes are associated with tamponade emulsification, intraocular inflammation, and rises in intraocular pressure, but these associations are not as strong when these substances are mixed with a heavy silicone oil (HSO). Two recently approved heavy silicone oil tamponades, Oxane HD and Densiron 68, are now available for use in clinical practice. While the complication spectrum of the new generation of these HSOs seems to be similar to that of conventional silicone oil tamponades, they provide better support for the inferior retina and the posterior pole.
CONCLUSION
Both regular and heavy silicone oils usually yield good success rates in cases of complicated retinal detachment. Decisions as to whether to utilize heavy or regular silicone oil should be made on a case-by-case basis.
Topics: Endotamponade; Humans; Papilledema; Retinal Detachment; Silicone Oils; Vitrectomy
PubMed: 28289950
DOI: 10.1007/s10792-017-0489-3 -
Journal of Oral Pathology & Medicine :... Jan 2017Head and neck squamous cell carcinoma (HNSCC) contributes globally to a great number of deaths and morbidity, in spite of new therapeutic strategies. There is a great... (Review)
Review
BACKGROUND
Head and neck squamous cell carcinoma (HNSCC) contributes globally to a great number of deaths and morbidity, in spite of new therapeutic strategies. There is a great need of new drugs that are significantly effective and less deleterious to the patients' general health. In this sense, phytotherapy is a tendency, with results pointing to its use as a chemo-preventive and adjuvant therapy. Therefore, the objective of this systematic review was to investigate the effects of curcumin on proliferation and survival of HNSCC.
MATERIALS AND METHODS
The search was conducted on six databases: Cochrane, LILACS, EMBASE, MEDLINE, PubMed, and Web of Science. In vitro and in vivo studies that evaluated the effects of curcumin on cell viability, tumor growth, cell cycle and/or cell death pattern in HNSCC cell lines or animal models were selected.
RESULTS
Of the 525 initially gathered studies, 30 met the inclusion criteria. These studies demonstrated that curcumin induces cytotoxicity, apoptosis (via intrinsic pathway), and cell cycle arrest in G /M phase in HSNCC cell lines. It also reduces tumor measurements in animal models. These events were mostly studied through MTT assay, flow cytometry, and cell cycle- and apoptosis-related proteins expression.
CONCLUSION
This systematic review demonstrated that curcumin is effective on HNSCC cell proliferation and survival, reinforcing the currently available evidence that curcumin could be an adjuvant drug in HNSCC treatment.
Topics: Antineoplastic Agents; Apoptosis; Carcinoma, Squamous Cell; Cell Cycle Checkpoints; Cell Survival; Chemotherapy, Adjuvant; Curcumin; Head and Neck Neoplasms; Humans; Squamous Cell Carcinoma of Head and Neck
PubMed: 27219631
DOI: 10.1111/jop.12455 -
Supportive Care in Cancer : Official... Mar 2023This systematic review and meta-analysis aimed to evaluate the available literature describing the efficacy of natural and miscellaneous agents in preventing acute... (Meta-Analysis)
Meta-Analysis Review
PURPOSE
This systematic review and meta-analysis aimed to evaluate the available literature describing the efficacy of natural and miscellaneous agents in preventing acute radiation dermatitis (RD) in cancer patients.
METHODS
OVID MedLine, Embase, and Cochrane literature databases were searched from 1946 to January 2023 for randomized controlled trials studying the use of natural and miscellaneous agents to prevent RD. RevMan 5.4 was used for the meta-analysis to calculate the pooled effect sizes and 95% confidence intervals (CI) using the random effects analysis.
RESULTS
For the systematic review and meta-analysis, 19 and 16 studies were included, respectively. Of the five studied natural products (aloe vera, oral enzymes, olive oil, calendula, and curcumin), only oral enzymes and olive oil significantly reduced the incidence of Radiation Therapy Oncology Group grade 2 (RR: 0.42, 95%CI 0.30-0.58, p < 0.00001, RR: 0.66, 95% CI 0.51-0.85, p = 0.001, resp.). The oral enzymes also reduced the grade 3 RD incidence (RR: 0.18, 95%CI 0.06-0.55, p = 0.003). The other agents demonstrated no significant effect.
CONCLUSION
This review and meta-analysis on natural and miscellaneous agents in preventing RD in cancer patients demonstrated that oral enzymes and olive oil prevented RD severity. However, evidence supporting natural agents to prevent RD is inconsistent, mainly because of low studies numbers, low-quality study designs, and small sample sizes. Therefore, concrete conclusions cannot be made. Research on (new) natural or miscellaneous agents should focus on a randomized controlled double-blinded study design with a large patient population, a higher consistency in research methods, and clinician- and patient-reported outcomes.
Topics: Humans; Olive Oil; Curcumin; Databases, Factual; Patient Reported Outcome Measures; Dermatitis
PubMed: 36859690
DOI: 10.1007/s00520-023-07656-z -
Critical Reviews in Toxicology Jan 2015Exposure to perfluoroalkyl and polyfluoroalkyl substances (PFASs) is ubiquitous in most regions of the world. The most commonly studied PFASs are perfluorooctane... (Review)
Review
BACKGROUND
Exposure to perfluoroalkyl and polyfluoroalkyl substances (PFASs) is ubiquitous in most regions of the world. The most commonly studied PFASs are perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA). Animal studies indicate that maternal PFAS exposure is associated with reduced fetal growth. However, the results of human studies are inconsistent.
OBJECTIVES
To summarize the evidence of an association between exposure to PFASs, particularly PFOS and PFOA, and human fetal growth.
METHODS
Systematic literature searches were performed in MEDLINE and EMBASE. We included original studies on pregnant women with measurements of PFOA or PFOS in maternal blood during pregnancy or the umbilical cord and associations with birth weight or related outcomes according to the PFAS level. Citations and references from the included articles were investigated to locate more relevant articles. Study characteristics and results were extracted to structured tables. The completeness of reporting as well as the risk of bias and confounding were assessed.
RESULTS
Fourteen studies were eligible. In utero PFOA exposure was associated with decreased measures of continuous birth weight in all studies, even though the magnitude of the association differed and many results were statistically insignificant. PFOS exposure and birth weight were associated in some studies, while others found no association.
CONCLUSIONS
Higher PFOS and PFOA concentrations were associated with decreased average birth weight in most studies, but only some results were statistically significant. The impact on public health is unclear, but the global exposure to PFASs warrants further investigation.
Topics: Alkanesulfonic Acids; Animals; Birth Weight; Caprylates; Environmental Exposure; Environmental Pollutants; Female; Fetal Development; Fluorocarbons; Humans; Maternal Exposure; Pregnancy; Pregnancy Outcome
PubMed: 25372700
DOI: 10.3109/10408444.2014.952400 -
Phytomedicine : International Journal... Aug 2018Radiotherapy is a mainstay of cancer treatment since decades. Ionizing radiation (IR) is used for destruction of cancer cells and shrinkage of tumors. However, the... (Review)
Review
BACKGROUND
Radiotherapy is a mainstay of cancer treatment since decades. Ionizing radiation (IR) is used for destruction of cancer cells and shrinkage of tumors. However, the increase of radioresistance in cancer cells and radiation toxicity to normal tissues are severe concerns. The exposure to radiation generates intracellular reactive oxygen species (ROS), which leads to DNA damage by lipid peroxidation, removal of thiol groups from cellular and membrane proteins, strand breaks and base alterations.
HYPOTHESIS
Plants have to deal with radiation-induced damage (UV-light of sun, other natural radiation sources). Therefore, it is worth speculating that radioprotective mechanisms have evolved during evolution of life. We hypothesize that natural products from plants may also protect from radiation damage caused as adverse side effects of cancer radiotherapy.
METHODS
The basis of this systematic review, we searched the relevant literature in the PubMed database.
RESULTS
Flavonoids, such as genistein, epigallocatechin-3-gallate, epicatechin, apigenin and silibinin mainly act as antioxidant, free radical scavenging and anti-inflammatory compounds, thus, providing cytoprotection in addition to downregulation of several pro-inflammatory cytokines. Comparable effects have been found in phenylpropanoids, especially caffeic acid phenylethylester, curcumin, thymol and zingerone. Besides, resveratrol and quercetin are the most important cytoprotective polyphenols. Their radioprotective effects are mediated by a wide range of mechanisms mainly leading to direct or indirect reduction of cellular stress. Ascorbic acid is broadly used as antioxidant, but it has also shown activity in reducing cellular damage after irradiation mainly due to its antioxidant capabilities. The metal ion chelator, gallic acid, represents another natural product attenuating cellular damage caused by radiation.
CONCLUSIONS
Some secondary metabolites from plants reveal radioprotective features against cellular damage caused by irradiation. These results warrant further analysis to develop phytochemicals as radioprotectors for clinical use.
Topics: Antioxidants; Ascorbic Acid; Curcumin; DNA Damage; Flavonoids; Humans; Lipid Peroxidation; Neoplasms; Phytochemicals; Plants; Polyphenols; Radiation Injuries; Radiation-Protective Agents; Radiotherapy; Reactive Oxygen Species; Resveratrol; Stilbenes
PubMed: 30166104
DOI: 10.1016/j.phymed.2017.11.005 -
Complementary Therapies in Medicine Mar 2024Curcumin has antioxidant properties and has been proposed as a potential treatment for NAFLD. The aim of current systematic review and meta-analysis was to evaluate... (Meta-Analysis)
Meta-Analysis
Curcumin effects on glycaemic indices, lipid profile, blood pressure, inflammatory markers and anthropometric measurements of non-alcoholic fatty liver disease patients: A systematic review and meta-analysis of randomized clinical trials.
OBJECTIVES
Curcumin has antioxidant properties and has been proposed as a potential treatment for NAFLD. The aim of current systematic review and meta-analysis was to evaluate previous findings for the effect of curcumin supplementation on glycaemic indices, lipid profile, blood pressure, inflammatory markers, and anthropometric measurements of NAFLD patients.
METHODS
Relevant studies published up to January 2024 were searched systematically using the following databases: PubMed, SCOPUS, WOS, Science Direct, Ovid and Cochrane. The systematic review and meta-analysis were conducted according to the 2020 PRISMA guidelines. The quality of the papers was assessed the using the Joanna Briggs Institute (JBI) Critical Appraisal Checklist. Pooled effect sizes were calculated using a random-effects model and reported as the WMD and 95% CI. Also, subgroup analyses were done to find probable sources of heterogeneity among studies.
RESULTS
Out of 21010 records initially identified, 21 eligible RCTs were selected for inclusion in a meta-analysis. Overall, 1191 participants of both genders, 600 in the intervention and 591 in the control group with NAFLD were included. There are several limitations in the studies that were included, for instance, the results are weakened substantially by potential bias or failure to account for potential adulteration (with pharmaceuticals) or contamination (with other herbs) of the curcumin supplements that were tested. However, previous studies have reported curcumin to be a safe complementary therapy for several conditions. Our study indicated that curcumin supplementation in doses of 50-3000 mg/day was associated with significant change in FBG [WMD: -2.83; 95% CI: -4.61, -1.06), I = 51.3%], HOMA-IR [WMD: -0.52; 95% CI: -0.84, -0.20), I= 82.8%], TG [WMD: -10.31; 95% CI: -20.00, -0.61), I = 84.5%], TC [WMD: -11.81; 95% CI: -19.65, -3.96), I = 94.6%], LDL [WMD: -8.01; 95% CI: -15.79, -0.24), I = 96.1%], weight [WMD: -0.81; 95% CI: -1.28, -0.35), I= 0.0%] and BMI [WMD: -0.35; 95% CI: -0.57, -0.13), I= 0.0%] in adults with NAFLD. There was no significant change in HbA1C, plasma insulin, QUICKI, HDL, SBP, DBP, CRP, TNF-α and WC after curcumin therapy. Subgroup analysis suggested a significant changes in serum FBG, TG, SBP, WC in RCTs for intervention durations of ≥ 8 weeks, and SBP, TG, LDL, HDL, BMI, WC in RCTs with sample size > 55 participants.
CONCLUSION
Curcumin supplementation in doses of 50-3000 mg/day over 8-12 weeks was associated with significant reductions in levels of FBG, HOMA-IR, TG, TC, LDL, weight and BMI in patients with NAFLD. Previous studies have reported curcumin as a safe complementary therapy for several diseases. We would suggest that should curcumin supplements be used clinically in specific conditions, it should be used with caution. Also, difference in grades of NAFLD may effect the evaluated outcomes, so it is suggested that future studies be conducted with an analyses on subgroups according to their NAFLD grade. Furthermore, because of the failure to conduct independent biochemical assessment of the turmeric/curcumin product used in most studies as well as potential sources of bias, results should be interpreted with caution.
Topics: Adult; Female; Humans; Male; Blood Pressure; Curcumin; Dietary Supplements; Glycemic Index; Lipids; Non-alcoholic Fatty Liver Disease; Randomized Controlled Trials as Topic
PubMed: 38232906
DOI: 10.1016/j.ctim.2024.103025 -
Journal of Ethnopharmacology May 2022Curcumin, an active polyphenol extracted from Traditional Chinese medicine Curcuma longa (turmeric), has shown many health-related benefits and pharmacological effects.... (Meta-Analysis)
Meta-Analysis
ETHNOPHARMACOLOGICAL RELEVANCE
Curcumin, an active polyphenol extracted from Traditional Chinese medicine Curcuma longa (turmeric), has shown many health-related benefits and pharmacological effects. Adjuvant curcumin therapy for ulcerative colitis has become increasingly popular, but its efficacy and safety of which is still controversial. The purpose of this study is to evaluate the efficacy and safety of adjuvant curcumin therapy in ulcerative colitis.
MATERIALS AND METHODS
The Medline, EMBASE, the Cochrane Library, CNKI, VIP, WanFang, and SinoMed databases were searched from inception to June 2021, to identify all randomized controlled clinical trials with adjuvant curcumin therapy in ulcerative colitis. The primary outcomes were clinical and endoscopic remission, and subgroup analyses were also performed.
RESULTS
Six randomized trials with a total of 385 participants were included in this study. Qualified trials recommended that adjuvant curcumin therapy for ulcerative colitis was effective in inducing clinical remission (RR = 2.10, 95% CI 1.13 to 3.89), but not in clinical improvement (RR = 1.62, 95% CI 1.00 to 2.61), endoscopic remission (RR = 4.17, 95% CI 0.63 to 27.71) or endoscopic improvement (RR = 4.13, 95% CI 0.20 to 87.07). Included studies showed that appropriate dosage, formation, longer duration, and topical medication may have a greater potential advantage. No severe adverse effects had been reported.
CONCLUSIONS
Available evidence suggested that adjuvant curcumin therapy may be effective for clinical remission in ulcerative colitis patients without causing severe adverse effects. The appropriate methods of administration can achieve better curative effect, which requires further study to verify.
Topics: Colitis, Ulcerative; Curcuma; Curcumin; Drug Therapy, Combination; Gastrointestinal Agents; Humans; Medicine, Chinese Traditional; Randomized Controlled Trials as Topic; Remission Induction
PubMed: 35091013
DOI: 10.1016/j.jep.2022.115041 -
Supportive Care in Cancer : Official... Nov 2022To evaluate the effectiveness of antioxidants in the prevention and management of oral mucositis in adults undergoing radiotherapy and/or chemotherapy with diagnosed... (Meta-Analysis)
Meta-Analysis Review
PURPOSE
To evaluate the effectiveness of antioxidants in the prevention and management of oral mucositis in adults undergoing radiotherapy and/or chemotherapy with diagnosed head and neck cancer (HNC) compared to placebo intervention.
METHODS
Cochrane, EMBASE, PubMed, and Web of Science databases were used to search for randomized controlled trials (RCTs) comparing oral or topical antioxidants with placebo in clinically diagnosed HNC adult patients receiving radiotherapy with/without chemotherapy. The primary outcome was to assess the efficacy of the antioxidant to prevent and decrease the incidence/prevalence and severity of oral/oropharyngeal mucositis. The risk of bias was assessed following Cochrane's guidelines.
RESULTS
The database search resulted in 203 records up to February 19, 2021. Thirteen RCTs were included with 650 HNC-diagnosed patients. Included studies showed a statistically significant improvement in mucositis severity score for all antioxidants except melatonin. However, further studies are needed as only one study reported outcomes for zinc, propolis, curcumin, and silymarin. Patients receiving vitamin E were 60% less likely to develop severe mucositis grade 2 or higher than those receiving placebo in one study (P = 0.040). Patients receiving zinc were 95% less likely to develop severe mucositis (grades 3-4) in one study compared to placebo (P = 0.031). One meta-analysis showed no statistical difference in the risk of having severe mucositis (grades 3-4) with 199 patients compared to placebo for honey (n = 2 studies, P = 0.403). Meta-analyses could not be conducted for zinc, propolis, curcumin, melatonin, silymarin, and selenium due to the lack of studies reporting similar outcomes for the same intervention.
CONCLUSION
Though oral and topical antioxidants significantly improved mucositis severity scores in HNC patients receiving radiotherapy with/without chemotherapy in individual studies, the quality of the evidence was low due to the small number of studies and unclear/high-risk bias. Additionally, large RCTs are needed to confirm these results.
Topics: Adult; Humans; Antioxidants; Mucositis; Curcumin; Propolis; Melatonin; Stomatitis; Head and Neck Neoplasms; Silymarin; Zinc
PubMed: 35680672
DOI: 10.1007/s00520-022-07190-4 -
Phytomedicine : International Journal... Dec 2022Melanin plays an important role in protecting human skin, while excessive synthesis of melanin can cause abnormal pigmentation and induce skin diseases. Long-term use of... (Review)
Review
BACKGROUND
Melanin plays an important role in protecting human skin, while excessive synthesis of melanin can cause abnormal pigmentation and induce skin diseases. Long-term use of commercial whitening agents in managing skin melanin such as kojic acid and arbutin can lead to some negative effects such as dermatitis and liver cancer. Although past studies have researched the melanin inhibitory effect of plant extracts, the effective dose and mechanisms are not well summarized and discussed. This study aims to explore the melanin inhibitory property of phytochemicals and tries to answer the following research questions: (1) Which plant extracts and phytochemicals could inhibit melanin biosynthesis in the skin? what is the mechanism of action? (2) Have human trials been conducted to confirm their melanin inhibitory effect? (3) If not, which phytochemicals are recommended for further human trials? This article would provide information for future research to develop natural and safe skin whitening products.
METHODS
A preferred reporting items for systematic reviews and meta-analyses (PRISMA) systematic review method and OHAT risk-of-bias tool were applied to screen literature from 2000 to 2021 and 50 research articles met the selection criteria.
RESULTS
Flavonoids, phenolic acids, stilbenes and terpenes are main classes of phytochemicals responsible for the melanin inhibitory effects. The in vitro/in vivo melanin inhibitory effects of these plant extracts/phytochemicals are achieved via three main mechanisms: (1) the ethyl acetate extract of Oryza sativa Indica cv., and phytochemicals such as galangin and origanoside could manage melanin biosynthesis through competitive inhibition, non-competitive inhibition or mixed-type inhibition of tyrosinase; (2) phytochemicals such as ginsenoside F1, ginsenoside Rb1 and 4‑hydroxy-3-methoxycinnamaldehyde could inhibit melanogenesis through down-regulating microphthalmia-related transcription factor (MITF) gene expression via different signalling pathways; (3) the ethanolic extracts of Dimorphandra gardneriana, Dimorphandra gardneriana, Lippia microphylla and Schinus terebinthifolius have a good ultraviolet absorption ability and high sun protective factor (SPF) values, thereby inhibiting UV induced melanogenesis in the skin.
CONCLUSION
Although many plant extracts and phytochemicals have been found to inhibit melanin production, most of the results were only proved in cellular and/or animal models. Only the ethyl acetate extract of Oryza sativa Indica cv. panicle, and ginsenoside F1 were proved effective in human trials. Animal studies proved the effectiveness of galangin, origanoside, ginsenoside Rb1 and 4‑hydroxy-3-methoxycinnamaldehyde with effective dose below 3 mM, and therefore recommended for future human trial. In addition, cellular studies have demonstrated the effectiveness of oxyresveratrol, mulberroside A, kurarinol, kuraridinol, plumbagin, (6aR,11aR)-3,8-dihydroxy-9‑methoxy pterocarpan, ginsenoside Rh4, cardamonin, nobiletin, curcumin, β-mangostin and emodin in inhibiting melanin synthesis at low concentrations of 20 µM and proved the low SPF values of Dimorphandra gardneriana, Dimorphandra gardneriana, Lippia microphylla and Schinus terebinthifolius extracts, and therefore recommended for further animal and human trials.
Topics: Acetates; Acrolein; Animals; Arbutin; Bleaching Agents; Cell Line, Tumor; Curcumin; Emodin; Flavonoids; Ginsenosides; Glucosides; Humans; Hydroxybenzoates; Melanins; Microphthalmia-Associated Transcription Factor; Monophenol Monooxygenase; Phytochemicals; Plant Extracts; Pterocarpans; Stilbenes; Transcription Factors
PubMed: 36126406
DOI: 10.1016/j.phymed.2022.154449