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*Corresponding Author: Gehan R. Abdel-Hamid. Radiation Biology Department, National Center for Radiation Research and Technology (NCRRT)-Atomic Energy Authority (AEA), Cairo.
Citation: Gehan R. A-Hamid, Lobna A. A-Aziz, Mona G. Anany. (2021). Zingerone Alleviate Toxicity Induced by Cisplatin or Gamma Radiation in Rats by Modulating Pro-Inflammatory Mediators. Cancer Research and Cellular Therapeutics. 5(5); Doi:10.31579/2640-1053/101
Copyright: © 2021 Gehan R. Abdel-Hamid, This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Received: 23 October 2021 | Accepted: 30 October 2021 | Published: 05 November 2021
Keywords: cisplatin; radiation; zingerone; nf-κb; tnf-α; caspase-3
Background: Zingerone is one of the active components of ginger that possesses multiple biological activities and anti-inflammatory properties against either radiation effect or cisplatin toxicity.
Purpose: to examine the protective effect of zingerone against gamma radiation (IR) or cisplatin-induced immunotoxicity.
Material and Methods: 48 rats were divided into six groups as follows: (group-1); normal control group received distilled water; (group-2); rats received Zingerone orally at a dose of 25 mg/kg b.wt. Once / day for 14 consecutive days (Zing.). (group-3); Rats were given a single injection of Cisplatin at a dose of 7.5 mg/kg b.wt. intraperitoneally (Cispl.). (group-4); Rats exposed to a single dose of 6 Gy whole-body gamma irradiation using 137Cesium source in a Gamma cell 40 (Rad.). (group-5); rats received same dose of Zingerone then they were exposed to gamma radiation as in group 4 (Zing+Rad.). (group-6); rats received Zingerone followed by single injection of Cisplatin at the dose of 7.5 mg/kg b.wt. Intraperitoneally (Zing+Cisp.).
Results: Exhibited a significant increase in expression of NF-κB, IL-10, caspase-3, and gene expression of TNF-α as well as oxidative stress biomarkers (MDA and NO) levels accompanied with a reduced level of SOD in either whole body-irradiated or cisplatin-received group. Conversely, pro-inflammatory cytokines levels were significantly decreased with an improvement of oxidative stress in groups that received zingerone.
Conclusion: It could be concluded that zingerone exerts its antioxidative activity and immunomodulatory effects through inhibition of pro-inflammatory mediators induced by whole body-gamma irradiation or cisplatin administration at two time interval early and late stage of radiation exposure (after 2 h and one week).Therefore, further studies are required to elucidate the molecular signaling pathway concerning zingerone.
Although ionizing radiation has a therapeutic effect against solid tumors, it produces oxygen and nitrogen (ROS/RNS) which generate free radicals and produce toxic effects [1, 2]. In addition, severe complications may result from the combination of it with chemotherapy and it is restricted when large doses are required [3, 4].
Natural products have activities that help to protect against radiation exposure and drugs damage. In addition, they have anti-viral, anti-inflammatory, and anti-bacterial properties, as well as cancer prophylaxis [5-8]. Zingerone, an essential oil, extracted from natural product ginger that was reported to have various biological functions including antiapoptotic and antioxidant effects through interfering with the inflammatory pathway leading to a protective effect [9, 10].
Nuclear factor-kappa (NF-κB) ameliorates the activated B cells and plays an important role in deoxyribonucleic acid (DNA) transcription, cytokine generation and, cell survival. It controls the expression of a large number of genes involved in inflammation such as COX-2, VEGF (vascular endothelial growth Factor) pro-inflammatory cytokines (IL-1, IL-2, IL-6, and TNFα), chemokines ( IL-8, MIP-1α, and MCP-1), adhesion molecules, immuno-receptors, growth factors, and other agents involved in proliferation and invasion [11].
Severe oxidative stress resulted from exposure to ionizing radiation that generates a large number of reactive oxygen species (ROS) [12]. Free radical reactions are produced by lipid peroxidation which is a degenerative process that causes damages to the enzyme system and DNA. SOD prevents the formation of a new free radical and converts the existing one into less harmful molecules so participates in deletion and neutralization of toxic ROS. NO is an immune inflammatory factor expressed in response to interferon gamma (IFN-γ) [13-15].
Based on previous studies reported radioprotective effects of ginger essential oil (GEO) on irradiated mice, this study was undertaken to spotlight the activity of zingerone against cisplatin or gamma radiation-induced immunotoxicity and possibilities to be utilized pre- radio and chemotherapy.
Chemicals
Zingerone and Cisplatin were obtained from (Sigma- Aldrich Chemical Co., St. Louis, MO, USA). Interleukin-10 (IL-10) (CAT# ab100764) and tumor necrosis factor-α (TNF-α) (CAT#ab236712)). ELISA kits for rat (Abcam Co., Cambridge, MA). SYBR Green Master Mix (Applied Biosystems, Carlsbad, California). NFKB western blot antibody Novus Biologicals, β-actin was obtained from Santa Cruz Biotechnology (Santa Cruz, California,USA). All the remaining chemicals and reagents were of the highest quality and analytical grade.
Radiation Facility
Male albino rats were exposed to 6 Gy whole-body gamma irradiation which was performed at NCRRT using Canadian Gamma cell-40 (Cs137), biological irradiator manufactured by Canada Ltd. Ottawa, Ontario, Canada. Animals were placed in a plastic sample tray with lid and supports provided for use in the sample cavity. The unit has ventilation holes which align with ventilation parts through the main shield to provide a means for uniform irradiation for small animals at a dose rate of 0.46 Gy/min at the time of experiment according to the guidelines of the Protection and Dosimetry Department.
Animals
Male Swiss albino rats weighing (120-150 g) used in this study were supplied from the animal breeding house of the National Center for Radiation Research and Technology (NCRRT). Rats were acclimatized in the animal facility of NCRRT for at least one week before subjecting them to experimentation. Rats were kept under standard housing conditions of temperature (22–24 °C) and humidity (60 ± 10%) and a 12 h light/ dark cycle. Animals were fed a commercial standard pellet diet (containing necessary nutritive elements 23% protein, 4.68
Experimental design
48 Male albino rats were maintained under standard environmental conditions, continually monitored for survival and clinical condition till the end of experiment. The study was conducted according to the Ethics Committee of the National Research Centre and in accordance with the recommendations for the proper care and use of laboratory animals (HIN publication No. 85-23, revised 1985). They were divided into six groups as follows: (group-1) (Cont.); normal control group received distilled water. (Group-2) (Zing.); rats received Zingerone (Sigma- Aldrich Chemical Co., St. Louis, MO, USA) orally at a dose of 25 mg/kg b.wt. Once/ day for 14 consecutive days 16. (Group-3) (Cispl.); Rats were given a single injection of Cisplatin (Sigma- Aldrich Chemical Co., St. Louis, MO, USA) at a dose of 7.5 mg/kg b.wt. intraperitoneally. (group-4); rats exposed to a single dose of 6 Gy 17 whole-body gamma irradiation (Rad.). (Group-5) (Zing+Rad.); rats received Zingerone once/ day for 14 consecutive days then immediately were exposed to gamma radiation (group-6) (Zing+Cisp.); rats received Zingerone once/ day for 14 consecutive days then at the end of Zing treatment followed by single intraperitoneal injection of Cisplatin at the dose of 7.5 mg/kg b.wt. All animals underwent careful observation along the experimental period. At the end of experiment, (after 2 hours and after one week of radiation exposure, two time intervals) rats were decapitated under gentle diethyl ether anesthesia and then sacrificed. Spleen was excised and collected from animals and stored at - 80°C.
Determination of the Oxidative Stress in splenic homogenate
Part of the spleen was weighted and homogenized (10%) in cold 50 mmol/L phosphate-buffered saline, pH 7.4. The homogenate was centrifuged at 1200 g for 15 min at 4 °C, and the supernatant was used. Lipid peroxidation was measured in terms of malondialdehyde (MDA) that measured in spleen according to the method of Yoshioka et al. [18] through thiobarbituric acid assay to forming thiobarbituric acid reactive substances (TBARS). In this reaction one molecule of MDA reacts with two molecules of thiobarbituric acid (TBA) in an acidic medium with production of a pink color of TBA-MDA that is measured at 535 nm.
Nitric oxide (NO) was measured according to the method of [19]. Nitric oxide is relatively unstable in the presence of molecular oxygen, with an apparent half-life of approximately 3-5 sec and is rapidly oxidized to nitrite and nitrate,totally designated as NOx. The assay determines total nitrite/nitrate level based on the reduction of any nitrate level to nitrite by vanadium, followed by the detection of total nitrite (intrinisic + nitrite obtained from reduction of nitrate) by Griess reagent. The Griess reaction entails formation of a chromophore from the diazotization of sulfanilamide by nitrite followed by coupling with bicycle amines, such as N-1-naphthylethylenediamine. The chromophoric a zoderivative can be measured colorimetrically at 540 nm.
Superoxide dismutase activity is measured in tissue homogenate according to the method of Minami and Yoshikawa [20]. Superoxide dismutase (SOD) catalyzes the dismutation of the superoxide radical (O2-) into hydrogen peroxide (H2O2) and elemental oxygen (O2).
Superoxide ions, generated from auto-oxidation of pyrogallol, convert the nitro blue tetrazolium chloride (NBT) to NBT-diformazan which absorbs light at 550 nm. Superoxide dismutase reduces the superoxide ion concentration thereby lowering the rate of NBT-diformazan formation. The extent of reduction in the appearance of NBT-diformazan is a measure of SOD activity present in samples.
Determination of interleukin-10 and tumor necrosis factor--α assays
The measurements of Interleukin-10 (IL-10) and tumor necrosis factor-α (TNF-α) were done, according to the instruction guidelines of the ELISA kits for rat (Abcam Co., Cambridge, MA).
Detection of caspase-3 by quantitative real-time PCR (qRT-PCR)
Isolation of RNA and Reverse Transcription: Spleen tissue (100 mg) was homogenized in 1ml TRIzol reagent (Invitrogen, U.S.A.) consequently incubated for 10 min at room temperature (RT). Samples were mixed with 0.2 ml chloroform and incubated for 3 min at RT, followed by centrifugation (12,000 g, 15 min). Isopropanol 0.5 ml was added to the isolated aqueous phase, samples were re-centrifuged (12,000 g, 10 min) and the resulting RNA pellet was washed with 75% ethanol and centrifuged again (7500 g, 5 min). The RNA pellets dissolved in diethylpyrocarbonate (DEPC) water, then incubated (55–60 °C, 10 min). Determination of the nucleic acids yield at 260 nm by a spectrophotometer was done.
The synthesis of cDNA was performed using the Reverse Transcription System (Promega, Leiden, and The Netherlands). Reverse transcription of RNA to synthesize single-stranded complementary DNA (cDNA) was performed using Thermo Scientific™ RevertAid™ First Strand cDNA Synthesis Kit (Fermentus, Thermo Fisher Scientific Inc, UK) according to the manufacturer instructions.
Quantitative Real-Time PCR
qRT-PCR was performed using an optical 96-well plate with an ABI PRISM 7500 fast sequence detection system (Applied Biosystems, Carlsbad, California) using Power SYBR® Green PCR Master Mix (Applied Biosystems, USA.). Syber green (SYBR® Green) chemistry is a method for performing real-time PCR analysis. SYBR® Green dye binds the minor groove of double-stranded DNA. When SYBR® Green dye binds to double-stranded DNA, the intensity of the fluorescence increases. As more double-stranded amplicons are produced, SYBR® Green dye fluorescence increases. The Power SYBR® Green PCR Master Mix can detect as few as 1 to 10 copies of a target gene over a wide range of DNA template concentrations. Universal thermal cycling conditions (95 °C for 10 min, 40 cycles of 95 °C for 15 s and 60 °C for 60 s). Each 10 μl reaction contained 5 μl SYBR Green Master Mix (Applied Biosystems), 0.3 μl gene-specific forward and reverses primers (10 μM), 2.5 μl cDNA and 1.9 μl nuclease-free water.The sequences of PCR primer pairs, (forward 5CAAACCACCAAGTGGAGGAG3, Reverse3'GTGGGTGAGGAGCACGTAGT-5') and β-actin (forward 5ATTGTTACCAACTGGGACGACATG-3 Reverse 3'-GAAGTCTA GAGCAACATAGCACA-5) as housekeeping gene. A threshold cycle (Ct) value was used for calculating the fold change expression.
Gel Electrophoresis
PCR product (10 μl) was analyzed on agarose gel 2% with ethidium bromide staining, visualized on ultraviolet transilluminator and semi-quantified by using a gel documentation system (Bio-Doc Analyze, Biometra, Germany). All values were normalized to the β-actin genes. The relative expression of the RT- PCR amplified products and the fold change in the target genes were determined by the ΔΔCt method This method calculates the relative expression rate of the gene of interest by calculating the difference in expression, expressed as cycle threshold (Ct) cycle, between the test gene and the reference gene (ΔCt) compared to that of the control samples (calibrator) (ΔΔCt) then calculating the fold induction using the formula 2- (ΔΔCt).
Western immunoblotting analysis of nuclear factor kappa- B
Spleen tissue NF-κB protein was extracted using TRIzol reagent and protein concentration was quantified according to [21], 20µg of protein per lane were separated with 10% SDS-PAGE and transferred onto PVDA membranes. Membranes were incubated at RT for 2 hours with blocking solution (5% nonfat dried milk in 10 mM TrisCl, pH 7.5, 100 mM NaCl, and 0.1% Tween 20), then incubated overnight at 4°C with 1:1000 diluted primary antibody towards NF-κB protein with β-actin as control. After washing 3 times in 10 mM Tris-Cl, pH 7.5, 100 mM NaCl, and 0.1% Tween 20, the membrane was incubated with the secondary monoclonal antibody (Cell Signaling Technologies, USA) conjugated to horseradish peroxidase at RT for 2 h, and then membranes were washed 4 times with the same washing buffer. The membrane was developed and visualized by chemiluminescence. The NF-κB protein was quantified by scanning a laser densitometer (Biomed Instrument Inc., USA).
Statistical analysis
Data analyses were performed using the SPSS 23.0 software (SPSS Inc., Chicago, IL, USA). All analyses were used One-way ANOVA, all experimental values were shown the mean ± SD. p ≤ 0.05 was considered significant for all tests.
The data presented in Table (1) showed that exposure to 6 Gy γ-radiations or injection with cisplatin resulted in a significant elevation at p≤0.05 in lipid peroxidation (MDA) levels and nitric oxide accompanied with a reduced level of SOD at all the time intervals examined compared to control group. Meanwhile, pre-administration of Zingerone attenuated and decreased the elevated levels of the oxidative stress markers (MDA and NO) along with enhancement in the SOD activity.
All values are expressed as means ± SD. a Significant difference vs. control group at p≤0.05. b significant difference vs. zingerone group at p≤0.05. c Significant difference vs. Cisplatin group at p≤0.05. d Significant difference vs. Rad. group at p≤0.05
The obtained data in Fig.1 revealed a significant increment at p≤0.05 in the pro-inflammatory mediator TNF-α, accompanied by a significant decrease in anti-inflammatory cytokine IL-10 in both cisplatin and gamma-irradiated groups at the two-time intervals compared to the control group. On the other hand, the administration of zingerone has an opposing effect throughout modulating the pro-inflammatory/ anti-inflammatory mediator.
As shown in Fig. 2, overexpression of caspase-3 in the spleen tissues of rats injected with cisplatin or exposed to gamma radiation at the two-time intervals was detected compared to normal control group. Conversely, treatment with zingerone resulted in a significant decline at p≤0.05 in its expression which may be due to the anti-apoptotic effect.
NF-κB activation is required for pro-inflammatory responses and the most important providers of inflammatory molecules are NF-κB and TNF-α. The experimental data (Fig. 3) showed that cisplatin or gamma-irradiation induced markedly upregulation of NF-κB protein expression in comparison with the control group at the two-time intervals. In contrast, the administration of zingerone was significantly downregulated its expression at p≤0.05.
Exposure to ionizing radiation (IR) has occurred during radiology (diagnostic or interventional), radiotherapy and occupational exposure in the radiation field. High radiation doses cause death whereas sublethal doses may induce diverse diseases, such as cancer, cardiovas cular diseases and cataracts [22]. In addition, ionizing radiation may cause harm to normal tissue with many complications that affect biological and physiological systems so they should be protected [23, 24].
The immune response in the damaged tissues as a result of radiation and chemotherapy is mediated by inflammatory cytokines response (polypeptide). The present investigations showed a significant elevation of the pro-inflammatory mediators TNF-α, NF-κβ and caspase3 accompanied by a significant reduction of anti-inflammatory cytokine (IL-10) after treatment with cisplatin or radiation exposure. These results coincide with the findings of [25]. Who suggested that enhanced inflammation by cisplatin may induce apoptosis by promoting caspase3activation and increased TNF-α and IFN-γ levels with decreased IL-10 release.
In the current study, prophylactic treatment of zingerone revealed an amelioration of the inflammatory responses caused by cisplatin with significantly decreased expression of both NFκB and TNF-α. In agreement with our study, previous reports suggested the zingerone inhibits colitis in rats by downregulating NF-kB activity, MAPK and IL10 signaling pathways [26, 27]. It was found to suppress the activity of both PPAR, and NF-kB [28].
Data of the present study, revealed high levels of MDA and NO accompanied by remarkable decreases of SOD, compared to the control status, reflecting the cisplatin toxicity, represented by depletion of the antioxidant system [29], and it has been supposed that cisplatin generates free radicals by interacting with DNA. In agreement with this, previous studies reported that NFκB activation is crucial in the expression of pro-inflammatory cytokines like TNF-α and other conditions related to increased ROS generation. In addition, Genetic generation of potentially cell-damaging oxidative enzymes like NADP oxidase and iNOS is induced due to the stimulation of transcription factor NF-κB by TNF- α. Inhibitors of NFκB have shown to protects against cisplatin-induced toxicity [30-32].
Administration of zingerone before cisplatin treatment also attenuates damage induced by cisplatin treatment; a decrease of malondialdehyde with concurrent amelioration of antioxidant activities was remarkable by its protective effect [33-36]. This protective effect against cisplatin-induced toxicity probably might be through the attenuation of oxidative stress and inflammation. Besides, that it aids in maintaining antioxidant and suppresses activation of redox-active transcription factor NFκB [10].
Pretreatment of whole body radiation-exposure group with ginger showed significant improvement of oxidative stress. This coincided with the study of [24] reported that radiation induced reduction in intestinal tissue antioxidant enzyme levels such as superoxide dismutase, catalase, glutathione peroxidase, and glutathione which was reversed following administration of ginger essential oil.
As mentioned, it can be concluded that zingerone has an ameliorative effect against oxidative stress induced by cisplatin or gamma radiation by modulating the inflammatory process and targeting the NF-kB pathway. Therefore, it is recommended to use zingerone as an adjuvant therapy to reduce the toxicity resulting from radiotherapy or chemotherapy. More investigations are required to know the exact mechanistic pathway.
Thanks to all the authors.
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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Dear Dr. Jessica Magne, Editorial Coordinator 0f Clinical Cardiology and Cardiovascular Interventions, The review process for the article “The Handling of Anti-aggregants and Anticoagulants in the Oncologic Heart Patient Submitted to Surgery” was extremely rigorous and detailed. From the initial submission to the final acceptance, the editorial team at the “Journal of Clinical Cardiology and Cardiovascular Interventions” demonstrated a high level of professionalism and dedication. The reviewers provided constructive and detailed feedback, which was essential for improving the quality of our work. Communication was always clear and efficient, ensuring that all our questions were promptly addressed. The quality of the “Journal of Clinical Cardiology and Cardiovascular Interventions” is undeniable. It is a peer-reviewed, open-access publication dedicated exclusively to disseminating high-quality research in the field of clinical cardiology and cardiovascular interventions. The journal's impact factor is currently under evaluation, and it is indexed in reputable databases, which further reinforces its credibility and relevance in the scientific field. I highly recommend this journal to researchers looking for a reputable platform to publish their studies.
Dear Editorial Coordinator of the Journal of Nutrition and Food Processing! "I would like to thank the Journal of Nutrition and Food Processing for including and publishing my article. The peer review process was very quick, movement and precise. The Editorial Board has done an extremely conscientious job with much help, valuable comments and advices. I find the journal very valuable from a professional point of view, thank you very much for allowing me to be part of it and I would like to participate in the future!”
Dealing with The Journal of Neurology and Neurological Surgery was very smooth and comprehensive. The office staff took time to address my needs and the response from editors and the office was prompt and fair. I certainly hope to publish with this journal again.Their professionalism is apparent and more than satisfactory. Susan Weiner
My Testimonial Covering as fellowing: Lin-Show Chin. The peer reviewers process is quick and effective, the supports from editorial office is excellent, the quality of journal is high. I would like to collabroate with Internatioanl journal of Clinical Case Reports and Reviews.
My experience publishing in Psychology and Mental Health Care was exceptional. The peer review process was rigorous and constructive, with reviewers providing valuable insights that helped enhance the quality of our work. The editorial team was highly supportive and responsive, making the submission process smooth and efficient. The journal's commitment to high standards and academic rigor makes it a respected platform for quality research. I am grateful for the opportunity to publish in such a reputable journal.
My experience publishing in International Journal of Clinical Case Reports and Reviews was exceptional. I Come forth to Provide a Testimonial Covering the Peer Review Process and the editorial office for the Professional and Impartial Evaluation of the Manuscript.
