1
|
Cong Y, Zhang Y, Han Y, Wu Y, Wang D, Zhang B. Recommendations for nutritional supplements for dry eye disease: current advances. Front Pharmacol 2024; 15:1388787. [PMID: 38873421 PMCID: PMC11169594 DOI: 10.3389/fphar.2024.1388787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/17/2024] [Indexed: 06/15/2024] Open
Abstract
Dry eye disease (DED) represents a prevalent ocular surface disease. The development of effective nutritional management strategies for DED is crucial due to its association with various factors such as inflammation, oxidative stress, deficiencies in polyunsaturated fatty acids (PUFAs), imbalanced PUFA ratios, and vitamin insufficiencies. Extensive research has explored the impact of oral nutritional supplements, varying in composition and dosage, on the symptoms of DED. The main components of these supplements include fish oils (Omega-3 fatty acids), vitamins, trace elements, and phytochemical extracts. Beyond these well-known nutrients, it is necessary to explore whether novel nutrients might contribute to more effective DED management. This review provides a comprehensive update on the therapeutic potential of nutrients and presents new perspectives for combination supplements in DED treatment.
Collapse
Affiliation(s)
| | | | | | | | | | - Bingjie Zhang
- Department of Ophthalmology, The First Hospital of Jilin University, Changchun, China
| |
Collapse
|
2
|
Chu L, Wang C, Zhou H. Inflammation mechanism and anti-inflammatory therapy of dry eye. Front Med (Lausanne) 2024; 11:1307682. [PMID: 38420354 PMCID: PMC10899709 DOI: 10.3389/fmed.2024.1307682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 01/14/2024] [Indexed: 03/02/2024] Open
Abstract
Dry eye is a widespread chronic inflammatory disease that causes fatigue, tingling, burning, and other symptoms. Dry eye is attributed to rheumatic diseases, diabetes, hormone disorders, and contact lenses, which activate inflammatory pathways: mitogen-activated protein kinases (MAPK) and nuclear factor-B (NF-κB), promote macrophage inflammatory cell and T cell activation, and inflammation factors. Clinicians use a combination of anti-inflammatory drugs to manage different symptoms of dry eye; some of these anti-inflammatory drugs are being developed. This review introduces the dry eye inflammation mechanisms and the involved inflammatory factors. We also elucidate the anti-inflammatory drug mechanism and the detection limits.
Collapse
Affiliation(s)
- Liyuan Chu
- Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Caiming Wang
- Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Hongyan Zhou
- Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun, China
| |
Collapse
|
3
|
Bahari H, Taheri S, Rashidmayvan M, Jamshidi S, Jazinaki MS, Pahlavani N. The effect of Royal jelly on liver enzymes and glycemic indices: A systematic review and meta-analysis of randomized clinical trials. Complement Ther Med 2023; 77:102974. [PMID: 37619715 DOI: 10.1016/j.ctim.2023.102974] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/08/2023] [Accepted: 08/21/2023] [Indexed: 08/26/2023] Open
Abstract
BACKGROUND Royal jelly (RJ) may contribute to glycemic control and liver function through various mechanisms. The present study aimed to quantify the effect of RJ supplementation on these outcomes. METHODS A literature search of Web of Science, Scopus, and PubMed/Medline, was conducted for RCTs investigating the efficacy of RJ on plasma liver enzymes and glycemic indices. Weighted mean differences (WMDs) and 95% confidence intervals (CIs) were calculated for net changes using a random-effects model. RESULTS Ten RCTs were selected for inclusion in this meta-analysis. Combined estimate of effect sizes for the impact of RJ on neither the plasma liver enzymes nor the glycemic indices were statistically significant. Subgroup analysis showed a significant reduction of serum FPG in trials with intervention duration ≥ 8 weeks (WMD: -4.28 mg/dl, 95% CI -7.41 to -1.14 mg/dl, p = 0.007), and those conducted in non-healthy populations (WMD: -4.28 mg/dl, 95% CI -7.41 to -1.14, p = 0.007). CONCLUSION RJ does not significantly affect liver function and glycemic profile of adult population. In trials with longer intervention and those conducted in non-healthy populations a significant reduction of serum FBG was observed. This meta-analysis should be repeated in the future, with more primary articles included, in order to provide conclusive results.
Collapse
Affiliation(s)
- Hossein Bahari
- Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Shaghayegh Taheri
- Department of Clinical Biochemistry, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran.
| | - Mohammad Rashidmayvan
- Department of Nutrition, Food Sciences and Clinical Biochemistry, School of Medicine, Social Determinants of Health Research Center, Gonabad University of Medical Science, Gonabad, Iran
| | - Sanaz Jamshidi
- Imam Ali hospital, Shiraz University of Medical Sciences, Kazerun, Iran.
| | | | - Naseh Pahlavani
- Health Sciences Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran; Social Development and Health Promotion Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran.
| |
Collapse
|
4
|
Markoulli M, Ahmad S, Arcot J, Arita R, Benitez-Del-Castillo J, Caffery B, Downie LE, Edwards K, Flanagan J, Labetoulle M, Misra SL, Mrugacz M, Singh S, Sheppard J, Vehof J, Versura P, Willcox MDP, Ziemanski J, Wolffsohn JS. TFOS Lifestyle: Impact of nutrition on the ocular surface. Ocul Surf 2023; 29:226-271. [PMID: 37100346 DOI: 10.1016/j.jtos.2023.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 04/06/2023] [Indexed: 04/28/2023]
Abstract
Nutrients, required by human bodies to perform life-sustaining functions, are obtained from the diet. They are broadly classified into macronutrients (carbohydrates, lipids, and proteins), micronutrients (vitamins and minerals) and water. All nutrients serve as a source of energy, provide structural support to the body and/or regulate the chemical processes of the body. Food and drinks also consist of non-nutrients that may be beneficial (e.g., antioxidants) or harmful (e.g., dyes or preservatives added to processed foods) to the body and the ocular surface. There is also a complex interplay between systemic disorders and an individual's nutritional status. Changes in the gut microbiome may lead to alterations at the ocular surface. Poor nutrition may exacerbate select systemic conditions. Similarly, certain systemic conditions may affect the uptake, processing and distribution of nutrients by the body. These disorders may lead to deficiencies in micro- and macro-nutrients that are important in maintaining ocular surface health. Medications used to treat these conditions may also cause ocular surface changes. The prevalence of nutrition-related chronic diseases is climbing worldwide. This report sought to review the evidence supporting the impact of nutrition on the ocular surface, either directly or as a consequence of the chronic diseases that result. To address a key question, a systematic review investigated the effects of intentional food restriction on ocular surface health; of the 25 included studies, most investigated Ramadan fasting (56%), followed by bariatric surgery (16%), anorexia nervosa (16%), but none were judged to be of high quality, with no randomized-controlled trials.
Collapse
Affiliation(s)
- Maria Markoulli
- School of Optometry and Vision Science, UNSW Sydney, NSW, Australia.
| | - Sumayya Ahmad
- Icahn School of Medicine of Mt. Sinai, New York, NY, USA
| | - Jayashree Arcot
- Food and Health, School of Chemical Engineering, UNSW Sydney, Australia
| | - Reiko Arita
- Department of Ophthalmology, Itoh Clinic, Saitama, Japan
| | | | | | - Laura E Downie
- Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Katie Edwards
- School of Optometry and Vision Science, Queensland University of Technology, Brisbane, Australia
| | - Judith Flanagan
- School of Optometry and Vision Science, UNSW Sydney, NSW, Australia; Vision CRC, USA
| | - Marc Labetoulle
- Ophthalmology Department, Hospital Bicêtre, APHP, Paris-Saclay University, Le Kremlin-Bicêtre, France; IDMIT (CEA-Paris Saclay-Inserm U1184), Fontenay-aux-Roses, France
| | - Stuti L Misra
- Department of Ophthalmology, New Zealand National Eye Centre, The University of Auckland, Auckland, New Zealand
| | | | - Sumeer Singh
- Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - John Sheppard
- Virginia Eye Consultants, Norfolk, VA, USA; Eastern Virginia Medical School, Norfolk, VA, USA
| | - Jelle Vehof
- Departments of Ophthalmology and Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; Section of Ophthalmology, School of Life Course Sciences, King's College London, London, UK; Department of Ophthalmology, Vestfold Hospital Trust, Tønsberg, Norway
| | - Piera Versura
- Cornea and Ocular Surface Analysis - Translation Research Laboratory, Ophthalmology Unit, DIMEC Alma Mater Studiorum Università di Bologna, Italy; IRCCS AOU di Bologna Policlinico di Sant'Orsola, Bologna, Italy
| | - Mark D P Willcox
- School of Optometry and Vision Science, UNSW Sydney, NSW, Australia
| | - Jillian Ziemanski
- School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - James S Wolffsohn
- College of Health & Life Sciences, School of Optometry, Aston University, Birmingham, UK
| |
Collapse
|
5
|
Prinz J, Maffulli N, Fuest M, Walter P, Hildebrand F, Migliorini F. Honey-Related Treatment Strategies in Dry Eye Disease. Pharmaceuticals (Basel) 2023; 16:ph16050762. [PMID: 37242545 DOI: 10.3390/ph16050762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
This systematic review and meta-analysis investigated whether honey-related treatment strategies improve the signs and symptoms of patients with dry eye disease (DED). In March 2023, the following databases were accessed for clinical trials investigating the efficacy of honey-related treatment strategies in DED: PubMed, Web of Science, Google Scholar, and EMBASE. The following data were extracted at baseline and at the last follow-up: Ocular Surface Disease Index, tear breakup time, Schirmer I test, and corneal staining. Data from 323 patients were retrieved (53.3% female, mean age 40.6 ± 18.1 years). The mean follow-up was 7.0 ± 4.2 weeks. All the endpoints of interest significantly improved from baseline to the last follow-up: tear breakup time (p = 0.01), Ocular Surface Disease Index (p < 0.0001), Schirmer I test (p = 0.0001), and corneal staining (p < 0.0001). No difference was found in tear breakup time (p = 0.3), Ocular Surface Disease Index (p = 0.4), Schirmer I test (p = 0.3), and corneal staining (p = 0.3) between the honey-related treatment strategies and the control groups. According to our main results, honey-related treatment strategies are effective and feasible to improve symptoms and signs of DED.
Collapse
Affiliation(s)
- Julia Prinz
- RWTH University Hospital of Aachen, 52074 Aachen, Germany
| | - Nicola Maffulli
- Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Salerno, Italy
- Barts and The London School of Medicine and Dentistry, Mile End Hospital, Queen Mary University of London, 275 Bancroft Road, London E1 4DG, UK
- School of Pharmacy and Bioengineering, Keele University Faculty of Medicine, Thornburrow Drive, Stoke on Trent ST4 7QB, UK
| | - Matthias Fuest
- RWTH University Hospital of Aachen, 52074 Aachen, Germany
| | - Peter Walter
- RWTH University Hospital of Aachen, 52074 Aachen, Germany
| | | | - Filippo Migliorini
- RWTH University Hospital of Aachen, 52074 Aachen, Germany
- Department of Orthopaedics and Trauma Surgery, Academic Hospital of Bolzano (SABES-ASDAA), 39100 Bolzano, Italy
| |
Collapse
|
6
|
Li X, Wang Z, Mu J, Puerkaiti H, Nulahou A, Zhang J, Zhao Y, Sun Q, Li Y, Wang Y, Gao Y. Prevalence and associated risk factors of dry eye disease in Hotan, Xinjiang: a cross-sectional study. BMC Ophthalmol 2023; 23:214. [PMID: 37189099 DOI: 10.1186/s12886-023-02955-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 05/02/2023] [Indexed: 05/17/2023] Open
Abstract
OBJECTIVES To assess the prevalence of dry eye disease (DED) in the Uyghur population in Hotan, Xinjiang, and to identify risk factors associated with this disorder. METHODS Between January and September of 2020, 5,121 Uyghur subjects aged 18 - 98 years from 105 villages were selected and studied cross-sectionally using a whole-group random sampling method in the Hotan area, Xinjiang, China. The Ocular Surface Disease Index questionnaire was used to collect subjective symptoms of DED and examine tear-film break-up times. The break up time and Schirmer's test were used to collect objective signs, to determine the prevalence of DED and its risk factors. RESULTS A total of 5,121 subjects aged 18 - 98 years were recruited from the Uyghur population in the Hotan region of Xinjiang, China, for eye examinations and questionnaire surveys. A total of 40.6% (2,078/5,121) were diagnosed with DED, of which 38.3% were male and 41.9% were female. The prevalence of DED was the highest in subjects ≥ 65 years of age, with 47.8% in males and 53.3% in females. The lowest occurrence was in subjects 18 - 44 years of age, with 32.5% in males and 33.7% in females. Older age, tea drinking, and staying awake late were risk factors affecting the severity of DED prevalence (p < 0.05), but there was no significant difference in sex, presence of diabetes, or presence of hypertension (p > 0.05). CONCLUSION The prevalence of DED in the study population was 40.6%, and its prevalence was higher in females, when compared with males. The prevalence of dry eye also increased with age, and at an advanced age, female sex, smoking, staying awake late, and not exercising were risk factors for DED.
Collapse
Affiliation(s)
- Xiaolong Li
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Zhen Wang
- School of Public Health, Xinjiang Medical University, 393 Xinyi Road, Xinshi District, Ürümqi, Xinjiang, China
| | - Jingyu Mu
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Hamila Puerkaiti
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Ayinu Nulahou
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Jie Zhang
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Yong Zhao
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Qi Sun
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Yuanyuan Li
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Yan Wang
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China
| | - Yunxian Gao
- Xinjiang Uygur Autonomous Region Traditional Chinese Medicine Hospital, No.116, Yellow River Road, Shayibake District, Ürümqi, 830000, China.
- Department of Ophthalmology, Traditional Chinese Medicine Hospital of Xinjiang Uyghur Autonomous Region, 116 Huanghe Road, Shayibake District, Ürümqi, Xinjiang, China.
| |
Collapse
|
7
|
Yu WY, Chan LYL, Chung A, Lee PH, Woo GC. Bilberry-containing supplements on severe dry eye disease in young and middle-aged adults: A 3-month pilot analysis. Front Nutr 2023; 10:1061818. [PMID: 36742436 PMCID: PMC9892183 DOI: 10.3389/fnut.2023.1061818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 01/05/2023] [Indexed: 01/20/2023] Open
Abstract
Purpose To explore the effect of bilberry and fish oil combination supplement on a small clinical sample patient-base with severe dry eyes. Methods Twenty-four subjects were recruited with twelve randomly assigned to the intervention and control groups, respectively. Inclusion criteria included severe dry eye symptoms determined by scores >33 from the Ocular Surface Disease Index (OSDI) questionnaire. The intervention group was instructed to take an oral supplement with key ingredients of 600 mg bilberry extract and 240 mg docosahexaenoic acid-refined fish oil once daily for 3 months. The control group did not take any supplements. Mean changes in OSDI score, non-invasive tear break-up time (NITBUT), phenol red thread test (PRT), and percentage of meibomian gland openings were used as outcome measures. Testing was done at baseline, 1-month, and 3-month follow-up. Comparison between the treatment and control groups, and the younger adult and middle-age groups were performed. Results The mean baseline values for the treatment and control groups were not clinically different. The OSDI score, NITBUT, PRT, and percentage of meibomian gland openings improved after taking the supplements for 3 months. The OSDI score, NITBUT, and PRT showed clinical improvements between the intervention and control groups. These improvements were consistent between the two age groups. Conclusion This study suggested preliminary improvements in signs and symptoms of severe dry eyes that were independent of age after taking dietary supplementation of bilberry extract and fish oil for 3 months. Further studies using more device-based measures and a placebo supplement are warranted.
Collapse
Affiliation(s)
- Wing Y. Yu
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Lily Y. L. Chan
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Aden Chung
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Paul H. Lee
- Southampton Clinical Trials Unit, University of Southampton, Southampton, United Kingdom
| | - George C. Woo
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China,Centre for Eye and Vision Research (CEVR), 17W Science Park, Hong Kong SAR, China,*Correspondence: George C. Woo,
| |
Collapse
|
8
|
Royal Jelly Increases Hematopoietic Stem Cells in Peripheral Blood: A Double-Blind, Placebo-Controlled, Randomized Trial in Healthy Subjects. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2023; 2023:7665515. [PMID: 36686976 PMCID: PMC9859695 DOI: 10.1155/2023/7665515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/15/2023]
Abstract
Objectives Royal jelly (RJ), produced by honeybees, influences stem cell functions, such as pluripotency maintenance of mouse embryonic stem cells and prevention of aging-related muscle stem cell functional deterioration. Thus, we hypothesized that RJ administration has various health-promoting effects based on stem cells. However, its effects are unknown in humans. In this study, we have attempted for the first time to clarify whether the administration of RJ in humans affects stem cells. Materials and Methods This randomized, double-blind, placebo-controlled study was performed on healthy subjects (n = 90) who received protease-treated RJ at a dose of 1200 mg/day or placebo daily for four weeks. Also, the participants with a low number of hematopoietic stem cells (HSCs) in peripheral blood were preferentially selected. HSC counts, endothelial progenitor cell (EPC) counts, blood cell counts in peripheral blood, cytokines in serum, and physical conditions were evaluated. Results and Conclusion. Eligible data from 86 subjects (placebo: 42, RJ: 44) who completed the study were analyzed. There were no significant differences between the two groups regarding the changes in peripheral HSC count (p=0.103), while diastolic blood pressure showed a significant improvement in the RJ group compared to that in the placebo group (p=0.032). The subgroup analysis excluded 14 subjects who complained of cold symptoms at baseline or within five days of the four-week study. The changes in the HSC populations were significantly higher in the RJ group than those in the placebo group (p=0.042). No adverse effects were observed in any of the groups. These results suggest that RJ administration affected the peripheral HSC count and may influence stem cell functions. Further research is needed to reveal the various health-promoting benefits of RJ based on stem cells.
Collapse
|
9
|
Abd Rashid N, Mohammed SNF, Syed Abd Halim SA, Ghafar NA, Abdul Jalil NA. Therapeutic Potential of Honey and Propolis on Ocular Disease. Pharmaceuticals (Basel) 2022; 15:1419. [PMID: 36422549 PMCID: PMC9696375 DOI: 10.3390/ph15111419] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/09/2022] [Accepted: 11/11/2022] [Indexed: 09/01/2023] Open
Abstract
Honey and propolis have recently become the key target of attention for treating certain diseases and promoting overall health and well-being. A high content of flavonoids and phenolic acids found in both honey and propolis contributes to the antioxidant properties to scavenge free radicals. Honey and propolis also exhibited antibacterial effects where they act in two ways, namely the production of hydrogen peroxide (H2O2) and gluconic acids following the enzymatic activities of glucose oxidase, which exerts oxidative damage on the bacteria. Additionally, the anti-inflammatory effects of honey and propolis are mainly by reducing proinflammatory factors such as interleukins and tumor necrosis factor alpha (TNF-α). Their effects on pain were discovered through modulation at a peripheral nociceptive neuron or binding to an opioid receptor in the higher center. The aforementioned properties of honey have been reported to possess potential therapeutic topical application on the exterior parts of the eyes, particularly in treating conjunctivitis, keratitis, blepharitis, and corneal injury. In contrast, most of the medicinal values of propolis are beneficial in the internal ocular area, such as the retina, optic nerve, and uvea. This review aims to update the current discoveries of honey and propolis in treating various ocular diseases, including their antioxidant, anti-inflammatory, antibacterial, and anti-nociceptive properties. In conclusion, research has shown that propolis and honey have considerable therapeutic promise for treating various eye illnesses, although the present study designs are primarily animal and in vitro studies. Therefore, there is an urgent need to translate this finding into a clinical setting.
Collapse
Affiliation(s)
- Norhashima Abd Rashid
- Department of Biomedical Science, Faculty of Applied Science, Lincoln University College, Petaling Jaya 47301, Malaysia
| | - Siti Nur Farhana Mohammed
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | | | - Norzana Abd Ghafar
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| | - Nahdia Afiifah Abdul Jalil
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
| |
Collapse
|
10
|
Placebo administration for dry eye disease: a level I evidence based systematic review and meta-analysis. Int J Clin Pharm 2022; 44:1087-1101. [PMID: 35939178 PMCID: PMC9618542 DOI: 10.1007/s11096-022-01439-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 06/04/2022] [Indexed: 12/05/2022]
Abstract
Background The efficacy of various common treatment options for dry eye disease (DED) has been investigated against placebo. However, the potential beneficial effect of placebo in the management of DED is still unclear. Aim This meta-analysis investigated the impact of placebo administration in DED in Ocular Surface Disease Index (OSDI), Schirmer I test (SIT), tear breakup time (TBUT), corneal staining, and complications. Method This meta-analysis and systematic review was conducted according to the 2020 PRISMA guidelines. In March 2022, Pubmed, Web of Science, Google Scholar, and Embase were accessed. All the randomised clinical trials which investigated any active treatment against a placebo control group were considered. The following data were extracted at baseline and at last follow-up: Ocular Surface Disease Index (OSDI), tear breakup time test (TBUT), Schirmer I test (SIT), corneal staining. Results Data from 56 studies (12,205 patients) were retrieved. Placebo administration is not effective in improving TBUT (P = 0.3), OSDI (P = 0.2), SIT (P = 0.1) and corneal staining (P = 0.1) from baseline to last follow-up. Active treatment led to a higher TBUT and SIT compared to placebo administration (P < 0.0001). The active treatment resulted in a lower OSDI compared to placebo administration (P = 0.0005). Five studies reported data on the corneal staining. No difference was found between placebo administration and active treatment (P = 0.8). Conclusion Placebo administration does not impact symptoms of DED and can be successfully employed to evaluate the efficacy of active treatments. Supplementary Information The online version contains supplementary material available at 10.1007/s11096-022-01439-y.
Collapse
|
11
|
Fujisue K, Yamamoto E, Sueta D, Arima Y, Hirakawa K, Tabata N, Ishii M, Ito M, Yamanaga K, Hanatani S, Hoshiyama T, Kanazawa H, Takashio S, Araki S, Usuku H, Nakamura T, Soejima H, Kaikita K, Kawano H, Matsushita K, Tsujita K. A Randomized, Double-Blind Comparison Study of Royal Jelly to Augment Vascular Endothelial Function in Healthy Volunteers. J Atheroscler Thromb 2021; 29:1285-1294. [PMID: 34588374 PMCID: PMC9444690 DOI: 10.5551/jat.63044] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aims: Royal jelly, a creamy substance secreted by honeybees, has been reported to have beneficial effects against dyslipidemia and metabolic syndrome. However, the effects of royal jelly on atherogenesis remain unknown. Hence, we prospectively evaluated whether royal jelly augments vascular endothelial function, which can reflect early atherogenesis, in healthy volunteers.
Methods: This was a single-center, double-blind, 1:1 randomized placebo-controlled study conducted from October 2018 to December 2019. A total of 100 healthy volunteers were randomly assigned to receive either royal jelly 690 mg or placebo daily for 4 weeks. The primary endpoint was augmentation in vascular endothelial function as assessed using the change in the reactive hyperemia peripheral arterial tonometry index (RH-PAT) index, and the secondary endpoints were the changes in liver function and lipid profiles between baseline and 4 weeks after enrollment.
Results: The mean age of the participants was 35.0±9.3 years in the placebo group and 36.1±9.1 years in the royal jelly groups; 45% and 50% of the placebo and the royal jelly groups, respectively, were male. The percentage relative change in the RH-PAT index was significantly higher in the royal jelly group than in the placebo group (21.4%±53.1% vs. 0.05%±40.9%,P=0.037). The percentage relative changes in alanine aminotransferase and γ-glutamyl transpeptidase were significantly lower in the royal jelly group than in the placebo group (alanine aminotransferase: −6.06%±22.2% vs. 11.6%±46.5%,P=0.02; γ-glutamyl transpeptidase: −3.45%±17.8% vs. 4.62%±19.4%,P=0.045). Lipid profiles were not significantly different between the two groups.
Conclusions: Royal jelly might have antiatherogenic property by improving vascular endothelial function. It also augmented liver functions in healthy volunteers.
Collapse
Affiliation(s)
- Koichiro Fujisue
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Eiichiro Yamamoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Daisuke Sueta
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Yuichiro Arima
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Kyoko Hirakawa
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Noriaki Tabata
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Masanobu Ishii
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Miwa Ito
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Kenshi Yamanaga
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Shinsuke Hanatani
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Tadashi Hoshiyama
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Hisanori Kanazawa
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Seiji Takashio
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Satoshi Araki
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Hiroki Usuku
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Taishi Nakamura
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Hirofumi Soejima
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Koichi Kaikita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Hiroaki Kawano
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| | - Kenichi Matsushita
- Division of Advanced Cardiovascular Therapeutics, Department of Cardiovascular Medicine, Kumamoto University Hospital
| | - Kenichi Tsujita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences and Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University
| |
Collapse
|
12
|
Yamaga M, Imada T, Tani H, Nakamura S, Yamaki A, Tsubota K. Acetylcholine and Royal Jelly Fatty Acid Combinations as Potential Dry Eye Treatment Components in Mice. Nutrients 2021; 13:2536. [PMID: 34444696 PMCID: PMC8399524 DOI: 10.3390/nu13082536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022] Open
Abstract
Dry eye is a multifactorial disease characterized by ocular discomfort and visual impairment. Our previous studies have shown that royal jelly (RJ) has restored the capacity for tear secretion by modulating muscarinic calcium signaling. RJ contains acetylcholine, which is a major cholinergic neurotransmitter, and a unique set of fatty acids with C 8 to 12 chains, which are expected to be associated with health benefits. The purpose of the present study was to investigate the active components involved in tear secretion capacity, focusing on acetylcholine and fatty acids in RJ. Using the stress-induced dry-eye model mice, it was confirmed that acetylcholine with three fatty acids (10-hydroxydecanoic acid, 8-hydroxyoctanoic acid, and (R)-3,10-dihydroxydecanoic acid) was essential for tear secretion. In ex vivo Ca2+ imaging, these three fatty acids suppressed the decrease in intracellular modulation of Ca2+ in the lacrimal gland by acetylcholine when treated with acetylcholinesterase, indicating that the specific type of RJ fatty acids contributed to the stability of acetylcholine. To our knowledge, this study is the first to confirm that a specific compound combination is important for the pharmacological activities of RJ. Our results elucidate the active molecules and efficacy mechanisms of RJ.
Collapse
Affiliation(s)
- Masayuki Yamaga
- Institute for Bee Products and Health Science, Yamada Bee Company, Inc., Okayama 708-0393, Japan; (M.Y.); (H.T.); (A.Y.)
| | - Toshihiro Imada
- Department of Ophthalmology, School of Medicine, Keio University, Tokyo 160-8582, Japan; (T.I.); (S.N.)
| | - Hiroko Tani
- Institute for Bee Products and Health Science, Yamada Bee Company, Inc., Okayama 708-0393, Japan; (M.Y.); (H.T.); (A.Y.)
| | - Shigeru Nakamura
- Department of Ophthalmology, School of Medicine, Keio University, Tokyo 160-8582, Japan; (T.I.); (S.N.)
| | - Ayanori Yamaki
- Institute for Bee Products and Health Science, Yamada Bee Company, Inc., Okayama 708-0393, Japan; (M.Y.); (H.T.); (A.Y.)
| | - Kazuo Tsubota
- Department of Ophthalmology, School of Medicine, Keio University, Tokyo 160-8582, Japan; (T.I.); (S.N.)
- Tsubota Laboratory, Inc., Shinjuku-ku, Tokyo 160-0016, Japan
| |
Collapse
|
13
|
Abstract
PURPOSE OF REVIEW Dry eye disease (DED) is a multifactorial disease affecting approximately 5-50% of individuals in various populations. Contributors to DED include, but are not limited to, lacrimal gland hypofunction, meibomian gland dysfunction (MGD), ocular surface inflammation, and corneal nerve dysfunction. Current DED treatments target some facets of the disease, such as ocular surface inflammation, but not all individuals experience adequate symptom relief. As such, this review focuses on alternative and adjunct approaches that are being explored to target underlying contributors to DED. RECENT FINDINGS Neuromodulation, stem cell treatments, and oral royal jelly have all been studied in individuals with DED and lacrimal gland hypofunction, with promising results. In individuals with MGD, devices that provide eyelid warming or intense pulsed light therapy may reduce DED symptoms and signs, as may topical Manuka honey. For those with ocular surface inflammation, naturally derived anti-inflammatory agents may be helpful, with the compound trehalose being farthest along in the process of investigation. Nerve growth factor, blood-derived products, corneal neurotization, and to a lesser degree, fatty acids have been studied in individuals with DED and neurotrophic keratitis (i.e. corneal nerve hyposensitivity). Various adjuvant therapies have been investigated in individuals with DED with neuropathic pain (i.e. corneal nerve hypersensitivity) including nerve blocks, neurostimulation, botulinum toxin, and acupuncture, although study numbers and design are generally weaker than for the other DED sub-types. SUMMARY Several alternatives and adjunct DED therapies are being investigated that target various aspects of disease. For many, more robust studies are required to assess their sustainability and applicability.
Collapse
Affiliation(s)
- Rhiya Mittal
- Ophthalmology, Miami Veterans Affairs Medical Center, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
| | - Sneh Patel
- Ophthalmology, Miami Veterans Affairs Medical Center, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
| | - Anat Galor
- Ophthalmology, Miami Veterans Affairs Medical Center, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
- Research Services, Miami Veterans Affairs Medical Center, Miami, FL, USA
| |
Collapse
|
14
|
Perminaite K, Marksa M, Stančiauskaitė M, Juknius T, Grigonis A, Ramanauskiene K. Formulation of Ocular In Situ Gels with Lithuanian Royal Jelly and Their Biopharmaceutical Evaluation In Vitro. Molecules 2021; 26:3552. [PMID: 34200887 PMCID: PMC8230528 DOI: 10.3390/molecules26123552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/07/2021] [Accepted: 06/07/2021] [Indexed: 12/20/2022] Open
Abstract
Royal jelly is a natural substance produced by worker bees that possesses a variety of biological activities, including antioxidant, anti-inflammatory, antibacterial, and protective. Although fresh royal jelly is kept at low temperatures, to increase its stability, it needs to be incorporated into pharmaceutical formulations, such as in situ gels. The aim of this study was to formulate in situ ocular gels containing Lithuanian royal jelly for topical corneal use in order to increase the retention time of the formulation on the ocular surface and bioavailability. Gels were evaluated for physicochemical characteristics (pH, rheological properties, refractive index) and in vitro drug release measuring the amount of 10-hydroxy-2-decenoic acid (10-HDA). An ocular irritation test and cell viability tests were performed using the SIRC (Statens Seruminstitut Rabbit Cornea) cell culture line. Results indicated that all the in situ gels were within an acceptable pH and refractive index range close to corneal properties. Rheology studies have shown that the gelation temperature varies between 25 and 32 °C, depending on the amount of poloxamers. The release studies have shown that the release of 10-HDA from in situ gels is more sustained than royal jelly suspension. All gel formulations were non-irritant according to the short-time exposure test (STE) using the SIRC cell culture line, and long-term cell viability studies indicated that the formulations used in small concentrations did not induce cell death. Prepared in situ gels containing royal jelly have potential for ocular drug delivery, and they may improve the bioavailability, stability of royal jelly, and formation of non-irritant ocular formulations.
Collapse
Affiliation(s)
- Kristina Perminaite
- Department of Clinical Pharmacy, Faculty of Pharmacy, Lithuanian University of Health Sciences, Sukileliai Ave. 13, 50162 Kaunas, Lithuania; (M.S.); (K.R.)
- Faculty of Pharmacy, Institute of Pharmaceutical Technologies, Lithuanian University of Health Sciences, Sukileliai Ave. 13, 50162 Kaunas, Lithuania
| | - Mindaugas Marksa
- Department of Analytical and Toxicological Chemistry, Lithuanian University of Health Sciences, Sukileliai Ave. 13, 50162 Kaunas, Lithuania;
| | - Monika Stančiauskaitė
- Department of Clinical Pharmacy, Faculty of Pharmacy, Lithuanian University of Health Sciences, Sukileliai Ave. 13, 50162 Kaunas, Lithuania; (M.S.); (K.R.)
| | - Tadas Juknius
- Faculty of Veterinary Medicine, Institute of Microbiology and Virology, Lithuanian University of Health Sciences, Tilzes Str. 18, 47181 Kaunas, Lithuania;
| | - Aidas Grigonis
- Dr. L. Kriaučeliūnas Small Animal Clinic, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, 47181 Kaunas, Lithuania;
| | - Kristina Ramanauskiene
- Department of Clinical Pharmacy, Faculty of Pharmacy, Lithuanian University of Health Sciences, Sukileliai Ave. 13, 50162 Kaunas, Lithuania; (M.S.); (K.R.)
| |
Collapse
|
15
|
Preparation of Ophthalmic Microemulsions Containing Lithuanian Royal Jelly and Their Biopharmaceutical Evaluation. Processes (Basel) 2021. [DOI: 10.3390/pr9040616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Royal jelly is a natural substance secreted by worker honeybees that possesses antioxidant, anti-inflammatory, and other biological activities. The purpose of this study was to formulate microemulsions with incorporated Lithuanian royal jelly for possible ophthalmic delivery and to evaluate the quality of the microemulsions in vitro. The oil in water type microemulsions were prepared by the oil titration method, incorporating royal jelly, surfactant, co-surfactant, oil, and water. Physicochemical characteristics of the microemulsions and the quantity of 10-hydroxy-2-decenoic acid released in vitro were assessed. The in vitro assessment of prepared microemulsions formulations was performed with the Statens Seruminstitut rabbit cornea (SIRC) cell culture model. The results revealed that the droplet size of all microemulsion formulations was 67.88–124.2 nm and the polydispersity index was lower than 0.180. In the in vitro release study, the release of 10-hydroxy-2-decenoic acid depended on the amount of royal jelly incorporated and on the ratio of surfactant and co-surfactant in formulations. The in vitro tests with the SIRC cell culture line have shown that all formulations were found non-irritating.
Collapse
|
16
|
Collazo N, Carpena M, Nuñez-Estevez B, Otero P, Simal-Gandara J, Prieto MA. Health Promoting Properties of Bee Royal Jelly: Food of the Queens. Nutrients 2021; 13:543. [PMID: 33562330 PMCID: PMC7915653 DOI: 10.3390/nu13020543] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 02/08/2023] Open
Abstract
Royal jelly (RJ) demand is growing every year and so is the market for functional foods in general. RJ is formed by different substances, mainly carbohydrates, proteins, and lipids, but also vitamins, minerals, and phenolic or volatile compounds in lower proportion. Major royal jelly proteins (MRJP) are, together with 10-hydroxy-2-decenoic acid (10-HDA), key substances of RJ due to their different biological properties. In particular, 10-HDA is a unique substance in this product. RJ has been historically employed as health enhancer and is still very relevant in China due to the traditional medicine and the apitherapy. Nowadays, it is mainly consumed as a functional food or is found in supplements and other formulations for its health-beneficial properties. Within these properites, anti-lipidemic, antioxidant, antiproliferative, antimicrobial, neuroprotective, anti-inflammatory, immunomodulatory, antiaging, and estrogenic activities have been reported for RJ or its specific components. This manuscript is aimed at reviewing the current knowledge on RJ components, their assessment in terms of authenticity, their biological activities, and related health applications.
Collapse
Affiliation(s)
- Nicolas Collazo
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Ourense Campus, University of Vigo, E32004 Ourense, Spain; (N.C.); (M.C.); (B.N.-E.); (P.O.)
| | - Maria Carpena
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Ourense Campus, University of Vigo, E32004 Ourense, Spain; (N.C.); (M.C.); (B.N.-E.); (P.O.)
| | - Bernabe Nuñez-Estevez
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Ourense Campus, University of Vigo, E32004 Ourense, Spain; (N.C.); (M.C.); (B.N.-E.); (P.O.)
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Bragança, Portugal
| | - Paz Otero
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Ourense Campus, University of Vigo, E32004 Ourense, Spain; (N.C.); (M.C.); (B.N.-E.); (P.O.)
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Ourense Campus, University of Vigo, E32004 Ourense, Spain; (N.C.); (M.C.); (B.N.-E.); (P.O.)
| | - Miguel A. Prieto
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Ourense Campus, University of Vigo, E32004 Ourense, Spain; (N.C.); (M.C.); (B.N.-E.); (P.O.)
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Bragança, Portugal
| |
Collapse
|
17
|
Hadi A, Rafie N, Arab A. Bee products consumption and cardiovascular diseases risk factors: a systematic review of interventional studies. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2021. [DOI: 10.1080/10942912.2020.1867568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Amir Hadi
- Halal Research Center of IRI, FDA, Tehran, Iran
| | - Nahid Rafie
- Department of Clinical Nutrition, School of Nutrition and Food Science, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Arman Arab
- Department of Community Nutrition, School of Nutrition and Food Science, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| |
Collapse
|
18
|
Irandoost P, Mesri Alamdari N, Saidpour A, Shidfar F, Roshanravan N, Asghari Jafarabadi M, Farsi F, Asghari Hanjani N, Vafa M. The effects of royal jelly and tocotrienol-rich fraction on impaired glycemic control and inflammation through irisin in obese rats. J Food Biochem 2020; 44:e13493. [PMID: 33020956 DOI: 10.1111/jfbc.13493] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 08/15/2020] [Accepted: 09/03/2020] [Indexed: 12/16/2022]
Abstract
The effects of royal jelly (RJ) and tocotrienol-rich fraction (TRF) on obesity-induced glucose intolerance and inflammation were assessed in the current study. Regarding irisin as an important adipomyokine that attenuates obesity-induced disorders, we evaluated whether RJ and TRF could exert their metabolism regulatory effects through irisin. Obese rats were fed a high-fat diet (HFD) with or without supplementation of RJ, TRF, or both, for 8 weeks. At the end of the intervention, weight, irisin, glycemic, and inflammatory indices were measured. The weight of the rats did not remarkably reduce in any of the groups. Glucose homeostasis and inflammation were improved when we added RJ and TRF to HFD. RJ elevated irisin concentration, but the effect of TRF on irisin was not noticeable. Our results indicated that, despite the lack of significant weight loss, RJ and TRF promoted healthy obesity. This improvement was mediated by irisin in RJ consuming rats. PRACTICAL APPLICATIONS: Obesity is a public health concern associated with several chronic disorders. The beneficial effects of irisin on obesity-related disorders are well-established. It is the first study assessing the effect of RJ and TRF as functional foods, with pharmacological and nutritional activities on obesity complications, through irisin mediation. Our study demonstrated that RJ exerts its metabolic regulatory effects by irisin as a mediator. Our investigation makes a remarkable contribution to the literature, because it suggests a new mechanism for the anti-obesity properties of RJ and TRF.
Collapse
Affiliation(s)
- Pardis Irandoost
- Student Research Committee, Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Naimeh Mesri Alamdari
- Student Research Committee, Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Atoosa Saidpour
- National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farzad Shidfar
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.,Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Neda Roshanravan
- Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Asghari Jafarabadi
- Road Traffic Injury Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farnaz Farsi
- Student Research Committee, Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.,Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Nazanin Asghari Hanjani
- Student Research Committee, Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Vafa
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
19
|
Kojima T, Dogru M, Kawashima M, Nakamura S, Tsubota K. Advances in the diagnosis and treatment of dry eye. Prog Retin Eye Res 2020; 78:100842. [PMID: 32004729 DOI: 10.1016/j.preteyeres.2020.100842] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 01/19/2020] [Accepted: 01/24/2020] [Indexed: 02/07/2023]
Abstract
The core mechanism of dry eye is the tear film instability. Tear film-oriented diagnosis (TFOD) is a concept to clarify the cause of tear film instability by tear film, and tear film-oriented treatment (TFOT) is a concept to treat dry eye disease by replacing the lacking components of the tear film layer based on the TFOD. In TFOD, the fluorescein breakup pattern of the tear film is important, and the subtype of dry eye can be judged to some extent from the breakup patterns. Current noninvasive devices related to the dynamic analysis of the tear film and visual acuity enabled the diagnosis of dry eye, subtype analysis, and the extent of severity. In Asian countries, secretagogues represent the main treatment in TFOT. Since meibomian gland dysfunction is a factor that greatly affects the tear breakup time, its treatment is also essential in the dry eye treatment strategy. A newly discovered dry eye subtype is the short breakup time-type (BUT) of dry eye. The only abnormal finding in this disease is the short BUT, suggesting a relationship with ocular neuropathic pain and eye strain. Recently, data from many studies have accumulated which show that dry eye is a life-style disease. In addition to the treatment of dry eyes, it is becoming possible to prevent the onset by intervening with the daily habits, diet, exercise and sleep, etc. It has been pointed out that oxidative stress is also involved in the pathology of dry eye, and intervention is being carried out by improving diet and taking supplements. Future research will be needed to link clinical findings to the molecular biological findings in the tear film.
Collapse
Affiliation(s)
- Takashi Kojima
- Department of Ophthalmology, Keio University School of Medicine, Japan
| | - Murat Dogru
- Department of Ophthalmology, Keio University School of Medicine, Japan
| | - Motoko Kawashima
- Department of Ophthalmology, Keio University School of Medicine, Japan
| | - Shigeru Nakamura
- Department of Ophthalmology, Keio University School of Medicine, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Japan; Tsubota Laboratory, Inc., Tokyo, Japan.
| |
Collapse
|
20
|
Kawashima M, Tsuno S, Matsumoto M, Tsubota K. Hydrogen-producing milk to prevent reduction in tear stability in persons using visual display terminals. Ocul Surf 2019; 17:714-721. [PMID: 31352083 DOI: 10.1016/j.jtos.2019.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 07/19/2019] [Accepted: 07/24/2019] [Indexed: 12/23/2022]
Abstract
PURPOSE To examine the effect of hydrogen (H2)-producing milk, which induces H2 production by intestinal microbiota, on the prevention of dry eye disease. METHODS A randomized, double-blind, placebo-controlled, parallel-group comparative study was conducted in humans. Of 118 candidates aged 20-60 years who were using visual display terminals daily, 54 subjects (mean age, 42.4 years) with mild-to-moderate dry eye symptoms, who were not dry eye patients based on the 2006 Japanese Diagnostic Criteria for Dry Eye, were included in the study. Subjects were assigned to the H2-producing milk group or the placebo group. They were instructed to ingest the assigned test beverage once per day for three consecutive weeks. Breath H2 concentration, fluorescein tear film breakup time (fTBUT), Schirmer's test, 8-OHdG concentration in tears, reported ocular symptoms using the dry eye-related QOL score questionnaire, and the visual analogue scale were assessed at weeks 0 and 3. RESULTS Change in fTBUT in the H2-producing milk group was significantly greater than that in the placebo group. A significant decline in fTBUT was observed in the placebo group (p = 0.04), but not the H2-producing group (p = 0.26). This phenomenon was strongly observed in females. We found a positive correlation between the change in fTBUT and net H2 production, and a negative correlation between the change in 8-OHdG concentration and net H2 production in young females. CONCLUSIONS H2-producing milk appeared to retard the decline in tear stability and may prevent short fTBUT-type dry eye by decreasing oxidative stress in the lacrimal functional unit.
Collapse
Affiliation(s)
- Motoko Kawashima
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, 160-8582, Japan.
| | - Saki Tsuno
- Dairy Science and Technology Institute, Kyodo Milk Industry Co. Ltd., Hinode-machi, Nishitama-gun, Tokyo, 190-0182, Japan
| | - Mitsuharu Matsumoto
- Dairy Science and Technology Institute, Kyodo Milk Industry Co. Ltd., Hinode-machi, Nishitama-gun, Tokyo, 190-0182, Japan.
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, 160-8582, Japan
| |
Collapse
|
21
|
Royal jelly does not improve markers of glycemia: A systematic review and meta-analysis of Randomized Clinical Trials. Complement Ther Med 2019; 44:235-241. [DOI: 10.1016/j.ctim.2019.04.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/22/2019] [Accepted: 04/22/2019] [Indexed: 12/22/2022] Open
|
22
|
Royal Jelly Delays Motor Functional Impairment During Aging in Genetically Heterogeneous Male Mice. Nutrients 2018; 10:nu10091191. [PMID: 30200401 PMCID: PMC6164577 DOI: 10.3390/nu10091191] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 01/29/2023] Open
Abstract
Aging is associated with motor disorders that decrease the quality of life (QOL). Royal jelly (RJ), used as a dietary supplement, has shown various health benefits and, therefore, it has the potential to improve the QOL during aging. We have previously developed protease enzyme-treated RJ to avoid the anaphylactic response induced by RJ supplementation. However, the effects of a lifelong treatment with RJ on normal aging have not been fully clarified. In this study, we investigated the effects of enzyme-untreated RJ (NRJ) and enzyme-treated RJ (ERJ) on the aging process focusing on motor functions, by using a genetically heterogeneous (HET) mouse model experimentally endowed with genetic diversity. We performed four different physical performance tests (grip strength, wire hang, horizontal bar, and rotarod). We showed that the age-related impairment of the motor functions was significantly delayed in RJ-treated mice. Both NRJ and ERJ were similarly effective against these types of aging-associated declines. Histological analyses revealed that the RJ treatment affected the muscle fiber size at an advanced age. We also demonstrated that age-related changes in muscle satellite cell markers and catabolic genes were affected in RJ-treated mice. These results suggest that non-protein components of RJ improved the motor function in aging mice. These findings indicate that RJ has the potential to change the QOL during aging by regulating the motor function.
Collapse
|