Abstract
Inflammatory bowel disease (IBD) is a term used for a variety of conditions involving persistent inflammation of the digestive system. Ulcerative colitis (UC) and Crohn’s disease (CD) are examples of IBD. There were some treatments like Amino salicylates, glucocorticoids, immunosuppressants, antibiotics, and surgery which have been used for treating IBD. However, the short and long-term disabling adverse effects, like nausea, pancreatitis, elevated liver enzymes, allergic reactions, and other life-threatening complications remain a significant clinical problem. On the other hand, herbal medicine, believed to be safer, cheaper, and easily available, has gained popularity for treating IBD. Nowadays, Ginger, the Rizhome of Z. officinale from the Zingiberaceae family, one of the most commonly used fresh spices and herbs, has been proposed as a potential option for IBD treatment. According to upper issues, IBD treatment has become one of the society’s concerns. So, this review aims to summarize the data on the yin and yang of ginger use in IBD treatment.
Introduction
CD and UC (examples of inflammatory bowel disorders) are relapsing, chronic, idiopathic, and remitting conditions of the gastrointestinal tract with an increasing incidence worldwide for which existing therapies are mostly limited by severe side effects (Chan and Giovannucci 2010; Terzić, Grivennikov et al., 2010; Sussman, Santaolalla et al., 2012). Typical clinical signs and symptoms of IBD, such as diarrhea, abdominal pain, hematochezia, as well as clinical signs of bleeding and intestinal obstruction, relying on the location of the disease, which may significantly reduce the patient’s quality of life. Despite the fact that the etiology of IBD is not well understood, both environmental factors and genetics are known as contributive risks (Fiocchi 1998). Cytokines, reactive oxygen metabolites, and eicosanoids are all inflammatory mediators with a role in the progression of the disease (Seo, Takata et al., 1995; Loguercio, D'Argenio et al., 1996; Carty, De Brabander et al., 2000). Amino salicylates, glucocorticoids, immunosuppressants, antibiotics, and surgery, in some cases, have been used for the treatment of IBD. However, the short and long-term disabling adverse effects like, nausea, pancreatitis, elevated liver enzymes, allergic reactions, and other life-threatening complications remain a significant clinical problem (Navaneethan and Lashner 2013). Furthermore, most of the medicines listed above need regular high-dose administration to achieve significant clinical effectiveness (Ensign et al., 2012; Moriasi et al., 2012; Wang and DuBois 2013; Dulai et al., 2014; Xiao et al., 2014; Zhang et al., 2015). In recent years, herbal therapies have shown beneficial effects in IBD patients (Ng et al., 2013). Nanoparticles have been used in treating IBD patients and in addition, it can be used to deliver low doses of medicines to special tissues and cell types while also reducing systemic adverse effects (Laroui et al., 2010; Laroui et al., 2011; Xiao et al., 2013; Morton et al., 2014; Xiao et al., 2014; Araújo et al., 2015; Han et al., 2015; Hansen et al., 2015; Ramishetti et al., 2015; Tang et al., 2015; Xiao et al., 2015; Xing et al., 2015).
Ginger, the Rizhome of Z. officinale from the Zingiberaceae family, is one of the most commonly used fresh spices and herbs, containing many active phenolic components such as Shogaol, Gingerol, and Zingerone (Algieri et al., 2015). These components have anti-inflammatory, antioxidative, and immunomodulatory properties (Mozaffari-Khosravi et al., 2016). Ginger has traditionally been used as a remedy for gingivitis, rheumatism, stroke, asthma, and diabetes (Afzal et al., 2001). Ginger has also been known as a “broad-spectrum anti-emetic” cause of its prevention of nausea resulting from postoperative courses, pregnancy, and motion sickness (Ali et al., 2008). Also, the efficacy of ginger as a remedy to improve IBD has been reported in many studies (Ensign et al., 2012; Ng et al., 2013; Xiao et al., 2014). Therefore, this review aims to summarize the results of studies on the potential efficacy or possible side effects of ginger in the IBD treatment.
Methods
We conducted a comprehensive search in online databases (PubMed, Google Scholar, Scopus, and Science Direct) published up to September 2021, to find studies investigating the effect of ginger in the treatment of IBD. No language limit was exerted. Our keywords included Ginger, Z. officinale, Gingerol, Zingerone, Inflammatory bowel diseases (IBDs), Ulcerative colitis, and Crohn’s disease.
Due to the importance of ginger and current investigations, we divided these studies into two parts: in vivo and in vitro studies.
In vivo studies
The efficacy of ginger has been shown in several in vivo and in vitro studies (Tables 1, 2). Studies demonstrated that T cells have a significant function in the immunological mechanisms of IBD. These data were concluded from genome-wide association studies, animal models of IBD, and some clinical trials. Inflammation is induced by Th1/Th17 cells that produce IFN-γ and IL-17; while TGF-β and IL-10 produced by Th2 have anti-inflammatory functions, for example, IL-10 inhibits pro-inflammatory cytokine expression by adaptive cells using STAT3-dependent signaling. Moreover, they have claimed that IL-17A enforces epithelial barrier function, so an inflammatory cytokine will be induced using an NF-κB dependent signaling (Gálvez 2014; Chen and Sundrud 2016).
TABLE 1
| Author/year | In vivo study design | Dose | Duration | Findings | Reference |
|---|---|---|---|---|---|
| Guo et al., 2021 | 32 Male BALB/c mice (weighing 18–22 g) divided into four groups with dextran sulfate sodium (DSS) induced colitis | 1) The control group was fed with standard rodent food and water without any other treatment; 2) The model group provided free access to 2.5% DSS, and orally administered normal saline at 100 μl/20 g daily; 3) was provided free access to 2.5% DSS and orally administered SASP at 400 mg/kg daily; 4) Provided free access to 2.5% DSS and orally administered Ginger at 500 mg/kg daily | Acclimatization for 3 days testing for 7 days | Mice administered ginger and SASP showed a lower weight loss than the model group. The disease activity index (DAI) of mice administered Ginger and SASP was also decreased significantly. Colon length shortening was less in ginger- and SASP-treated mice than in the model group mice. The spleen index of the Ginger- and SASP-treated mice was significantly lower than the model group mice Overall ginger inhibited colitis progression, alleviated colon injury, and regulated the fecal microbiome | Guo et al., 2021 |
| EL-Abhar et al., 2008 | 48 Male Wistar rats with acetic acid-induced UC | Gp1.2: Vehicle | 3 days before and 7 days after induction | MDA and PCO improvement with GE was comparable with high doses of sulfasalazine. Ginger had an effect against acetic acid-induced UC through its anti-oxidants and anti-inflammatory properties | El-Abhar et al. (2008) |
| Gp3.4.5: GE | |||||
| 100, 200, 400 mg/kg/d, respectively | |||||
| Gp6: Sulfasalazine | |||||
| Ajayi et al., 2008 | 36 adult male BALB/c mice with DSS-induced chronic UC | Gp1: Corn oil (control) | 63 days | In UC cases, 6-Gingerol Ameliorates: phenotypic clinical features, oxide-inflammatory stress indices, histopathological damages, pro-inflammatory cytokines and chemokines, NF-kB (P65), p38, and iNOS expressions, COX-2 and, catenin while it increases APC expression, inhibits aberrant crypt foci formation | Ajayi et al. (2018) |
| GP2: Normal mice chow and DSS | |||||
| Gp3: 100 mg/kg/d 6-Gingerol and DSS | |||||
| Gp4: Sulfasalazine and DSS | |||||
| Gp5: 6-Gingerol 100 mg/kg/d | |||||
| Gp6: Sulfasalazine | |||||
| Zhang et al. (2017) | 3 Female FVB mice | GDLVs-siRNA complex | Administrations 12 h apart | Orally administered siRNA-CD98/GDLVs reduced the expression of CD98 in ileum and colon but did not affect duodenum or jejunum | Zhang et al., 2017 |
| Orally administrated Twice | |||||
| Kim et al. (2018) | 40 female BALB/c mice in five groups (n = 8) with 5% DSS-induced colitis | Gp1: Water | 21 days | Improved symptoms of DSS-induce colitis: inhibited shortening of colon, increased body weight, attenuated and reduced the MPO activity and pro-inflammatory cytokines and mRNA expression but enhanced the mRNA expression of tight junction proteins | Kim et al. (2020) |
| GP2: DSS | |||||
| Gp3: DSS +100 mg/kg ginger orally, once a day | |||||
| Gp4: DSS +300 mg/kg ginger orally, once a day | |||||
| Gp5: DSS +500 mg/kg ginger orally, once a day | |||||
| Abdel Gawad et al. (2007) | 48 Male Sprague-Dawley rats divided into six groups (n = 8) with acetic acid-induced UC | Gp1: Saline | Three consecutive days before intra-rectal acetic acid administration and 7 days after the induction = 10 days | Reduced the lesions scores macroscopic colonic damage and the histopathological changes- by having a protective effect against acetic acid, damage to the epithelium | Abdel Gawad et al. (2007) |
| Gp2: Positive control | |||||
| Gp3: 100 mg/kg GE | |||||
| Gp4: 200 mg/kg GE | |||||
| Gp5: 400 mg/kg GE | |||||
| El-masry et al., 2016 | 40 BALB/c mice divided into five groups (n = 8) with colitis | Gp1: Filtered water | 10 days | increased anti-inflammatory, improved immune system efficiency, effected as an anti-oxidant | El-masry et al. (2016) |
| Gp2: 5% DSS | |||||
| Gp3: 200 mg/kg MOR orally Gp4: 100 mg/kg/d ginger orally | |||||
| Gp5: 200 mg/kg/d MOR and 100 mg/kg/d ginger orally | |||||
| Minaiyan et al. (2007) | 66 male Wistar rats divided into 11 groups (n = 6) with acute colitis | Gp1,2,3,4: Normal saline | 5 days | Effected anti-inflammatory, effected as an anti-oxidant, modulated the immune system | Minaiyan et al. (2007) |
| Gp5,6,7: 150–700 mg/kg Ginger hydro alcoholic extract, orally | Gp5, 6: The final dosage was given 2 h before the colitis induction | ||||
| Gp8,9: 350–700 mg/kg Ginger hydro alcoholic extract | Gp8,9: 15 and 2 h before colitis induction | ||||
| Gp10,11: Hydrocortisone acetate or prednisolone | |||||
| Rashidian et al | Six male Wistar rats with acid-induced colitis | Ginger volatile oil at dosages of 100–400 mg/kg | 6 days | Ginger volatile oil with all doses lowered colon weight, length and ratio considerably, and the results were comparable to the reference treatments.Higher oral doses of volatile oil (200 and 400 mg/kg) lowered ulcer severity, ulcer area and ulcer index markedly.The dose of 400 mg/kg of volatile oil was advantageous to considerably lower inflammation severity and inflammation extent compared to the control group | Rashidian et al. (2014) |
| Normal control: Saline 2 ml/kg | |||||
| Model control: Saline 2 ml/kg | |||||
| 100 mg/kg volatile oil in Group 1 | |||||
| Group 2 (volatile oil): 200 mg/kg | |||||
| 400 mg/kg volatile oil in Group 3 | |||||
| Prednisolone group: 4 mg/kg prednisolone | |||||
| Murakami et al | 75 Female ICR mice with dextran sodium sulfate-induced colitis | Control group (1): Tap water | 1 month | Oral feeding of ZER attenuated DSS(c) -induced colitis, while NIM controlled the histological alterations generated by DSS without changing inflammatory biomarkers. However, their therapy in combination was most effective for lowering these indicators. The data show that ZER is a novel dietary component for minimizing experimental UC. | Murakami et al. (2003) |
| Group 2: 5% DSS in tap water | |||||
| Group 3: 0.1% ZER (a) | |||||
| Group4: 0.1% NIM (b) | |||||
| Group 5: 0.1% ZER plus 0.1% NIM | |||||
| Abd Allah et al | 36 Male Wistar Albino rats with acetic acid-induced colitis | 1. Normal control group: 2 ml distilled water for 5 days | 5 days | Ginger therapy ameliorated the effects of AA(e)-induced colitis by reducing colon weight-to-length ratio, macroscopic and microscopic scores | Abd Allah et al. (2016) |
| 2. Ginger control group: 2 ml distilled water + 400 mg/kg ginger for 5 days | These effects were further corroborated by the down-regulation of NF-kB and decreased colonic IL-10, TP, TNF- α, and serum 5-HT levels | ||||
| 3. Colitis-24 h group: 2 ml distilled water for 5 days + AA for 24 h | Furthermore, there were significant positive relationships between serum 5-HT and macroscopic, microscopic, immunoreactivity scores and colonic TNF-α levels | ||||
| 4. Ginger-preventive group: 400 mg/kg ginger for 5 days + AA for 24 h | In conclusion, Ginger ameliorated AA-induced colitis not only through its anti-inflammatory and antioxidant features but also via the lowering of 5-HT, which may contribute to the down-regulation of NF-kB-dependent TNF- α production and the reduction of lipid peroxidation and tissue damage | ||||
| 5. Colitis-5-days group: AA for 24 h + 2 ml distilled water for 5 days | In addition, ginger’s therapeutic influence was greater than its preventive effect | ||||
| 6. Ginger-treated group: AA for 24 h + 400 mg/kg ginger for 5 days | |||||
| Zhang et al | FVB/NJ mice with dextran sodium sulfate-induced colitis | On animals | 1 h–14 days | In vivo, oral administration with NPs-PEG-FA/6-shogaol dramatically decreased colitis symptoms and expedited colitis wound healing in DSS-treated mice via modulating the expression levels of pro-inflammatory (TNF-α, IL-6, IL-1β, and iNOS) and anti-inflammatory (Nrf-2 and HO-1) proteins | Zhang et al. (2018) |
| Control group: Plain water | |||||
| DSS control: DSS | |||||
| Group 3: NPs-PEG-FA/6-shogaol | |||||
| Group 4: Free 6-shogaol | |||||
| Liu et al., 2019 | 30 male Sprague Dawley rats with single-dose TNBS-induced colitis | In vivo | In vivo: Once a day for seven consecutive days from the day after induction | In vivo: AZ-SFE effectively attenuated disease activity, colonic shortening, macroscopic and histological damage of TNBS-treated rats with decreased oxidative stress, suppressed inflammatory cytokines and altered hepcidin and serum iron | Liu et al. (2019) |
| Gp1: Control | |||||
| Gp2: TNBS | |||||
| Gp3: TNBS/mesalazine | |||||
| Gp4: TNBS/AZ-SFE (30 mg/kg) | |||||
| GP5: TNBS/AZ-SFE (60 mg/kg) | |||||
| Hsiang et al., 2013 | 24 female BALB/c mice with TNBS-induced colitis | Gp1: Mock, given ethanol | 7 days | Ginger and zingerone ameliorated TNBS-induced colonic injury and significantly downregulated cytokine-associated pathways which upregulated via NBS induced colitis. Additionally, (NF-κB) and (IL-1β) were essential molecules involved in the expression of ginger- and zingerone-affected genes and ginger and zingerone reduced TNBS-induced NF-κB activation and lowered the TNBS-increased NF-κB and IL-1β protein levels in the colon | Hsiang et al. (2013) |
| GP2: TNBS, given TNBS | |||||
| Gp3: TNBS/ginger, given mixtures containing TNBS and ginger (0.1–100 mg/kg) | |||||
| Gp4: TNBS/zingerone, given mixtures containing TNBS and zingerone (0.1–100 mg/kg) | |||||
| Shanshan Guo et al. (2021) | 32 male BALB/C mice with UC | Divided in four groups Group1: standard food and water Group2: 2.5% DSS + 100 μL/20 normal saline orally, once a day Group3: 2.5% DSS + 400 mg/kg SASP orally, once a day Group4: 2.5% DSS + 500 mg/kg ginger orally, once a day | 7 days | Decreased body weight and reduced disease activity, inhibited shortening of colon, decreased spleen index decreased the mRNA expression levels of these inflammatory cytokines and reduced severe intestinal mucosa injury and inflammatory cells | Guo et al. (2021) |
| Eidnahed Soliman 2021 | 20 rats | Divided into four groups Group1: control Group2: AUC Group3: AUC received 2.5 mg GE | NAN | GDNP was more effective in compare with GE. | Al Badawi, Waly et al. (2021) |
| Group4:2.5 mg superparamagnetic@ silver nanoparticles GDNP | Improved signs, reduced apoptosis and effective repair of AUC more significantly | ||||
| Sung et al., 2022 | 20 female mice 6–8 weeks with 2% DSS for 7 days in a row to induce mild colitis in 15 mice | Group 1: Healthy control | 7 days | mice fed with IL-22/nLNPs experienced an accelerated healing process, as indicated by the recovery of more body weight and colon length as well as reduction of the histological index, colonic MPO activity, fecal lipocalin concentration, and mRNA expression levels of pro-inflammatory cytokines (TNF-α, IL-6, and IL-1β)nLNPs is an excellent mRNA delivery platform for treating ulcerative colitis | Sung et al. (2022) |
| Group 2: DSS + PBS Group 3: DSS + blank nLNPs | |||||
| Group 4: DSS + IL-22/nLNPs | |||||
| The dosage of IL22/nLNPs was 200 μg/kg (or 4 μg/mouse) and dosed volume was 200 μl for each mouse |
The characteristics of the included in vivo studies on the effect of ginger on IBD.
TABLE 2
| Author/year | In vitro study design | Dose | Duration | Findings | Reference |
|---|---|---|---|---|---|
| Zhang et al. (2017) | Caco-2BBE, RAW264.7, Colon-26 cells | GDNV (5,10,20,50,100, and 200 μM) | 24 h incubation | GVDLs: are biocompatible and do not affect the integrity of intestinal barrier function and do not induce apoptosis in RAW 264.7 & colon-26 cells. SiRNA-CD98/GDLVs can decrease CD98 expression | Zhang et al. (2017) |
| Zhang et al | Raw 264.7 macrophage and colon-26 cells | In culture:Ginger active compound 6-shogaol loaded NPs-PEG-FA nanoparticles (2mg/mL) | 1 h to 14 days | Subsequent cellular uptake tests indicated that NPs-PEG-FA could undergo effective receptor-mediated uptake by colon-26 cells and activated Raw 264.7 macrophage cells | Zhang et al., 2018 |
| Liu et al., 2019 | 1.normal RAW264.7 cells | In vitro:1.Gp1: VehicleGp2: AZ-SFE (2.5–160 μM) Gp3: ligustilide Gp4: 6-gingerol (2.5–160 μM) | In vitro: 1. 24 h incubation | In vitro | Liu et al. (2019) |
| 2.LPS-induced RAW264.7 cells | 2. Gp1: blank control Gp2: LPS Gp3: LPS/AZ-SFE (0.625–20 μg/ml) Gp4: LPS/combination of Ligustilide and 6-gingerol (0.05–164 μg/ml) | 2. 1 h pretreatment with AZ-SFE or a combination of ligustilide and 6-gingerol and then 24 h stimulation with LPS | Not only did AZ-SFE dramatically reduce the formation of NO in LPS-stimulated macrophages, but also stopped the proliferation of Con.A-induced splenocytes with suppression of the Th1 immune response | ||
| 3.splenocytes | 3. GP1: blank controlGP2: Con.A Gp3: Con.A/AZ-SFE (5–20 μg/ml) | 3. 24 h incubation |
The characteristics of the included in vitro studies on the effect of ginger on IBD.
In 2018, Chen et al. (2018) investigated the effect of the volatile of Amomum villosum (VOAV), a herbaceous plant in the ginger family, on the immunological function of T cells in IBD rats. They discovered that VOAV therapy reduced IL-17 and IFN- levels while increasing TGF- and IL-10 levels. Therefore, VOAV therapy reduced the level of pro-inflammatory cytokines and clearly repressed intestinal inflammation in IBD rats. These results were also supported in an in vivo part of a study by Zhang et al. In which they studied a particular population of nanoparticles that were derived from edible ginger (GDNPs 2) and analyzed their IBD targeting following oral administration. These particles contain high levels of bioactive elements of ginger like 6-gingerol and 6-shogaol. Using different mouse models, they claimed that oral use of GDNPs 2 reduced the pro-inflammatory cytokines like IL-10 and IL-22 (Zhang et al., 2016). Guo et al. (2021) evaluated the effect of ginger on improving symptoms of UC using a DSS-induced mice colitis model. Ginger inhibited colon shortening decreased INOs, IL-6, and the mRNA expression levels of inflammatory cytokines, Hematoxylin, and Eosin (H&E) staining of the colon tissues. Less severe intestinal mucosa injury and regulated the fecal microbiome compared to the control group. Reduced lesions and histopathological changes in the colon subsequent to the use of the ginger extract in rats with acetic acid-induced UC have also been reported (Abdel Gawad et al., 2007). Hsiang et al. (2013), for the first time, demonstrated that ginger and its constituent zingerone could improve TNBS-induced colitis in mice via modulation of IL-1β signaling pathway and NF-κB activity. Ginger plus zingerone therapy reduced the number of brown cells in the colon. They also substantially regulated numerous cytokine expressions, such as IL-6, IL-1β, interferon-c, IL-17, and tumor necrosis factor (TNF-α). Toll-like receptors (TLRs) were increased by TNBS, which resulted in the activation of inflammation-related pathways and the development of intestinal inflammation, while ginger and zingerone inhibited TLR signaling and alleviated TNBS-induced colitis in mice.
In 2014, Rashidian et al. (2014) realized that volatile ginger oil could significantly relieve colitis symptoms. The results showed that volatile ginger oil decreased the inflammation severity, inflammation extent, and crypt damage induced by acetic acid and involvement percentage in a dose-dependent manner. The reference drug used in their study was oral prednisolone, and it was used to portray the effectiveness of the test substance. They assumed that pretreatment for 5 days with this drug enhanced the absorption and systemic availability of the active drugs. The same results were found using a medium and high doses of volatile ginger oil. Their results indicate that ginger may be advantageous in the treatment of colon mucosal damage caused by IBD due to its anti-lipo per oxidative and anti-oxidant actions. These properties originate from its ability to scavenge free radicals and protect cell membranes from oxidants, and overall its anti-oxidant value Ajayi et al. (2018) showed that 6-Gingerol could Ameliorate phenotypic clinical features of UC, such as rectal bleeding and diarrhea, and substantially minimize the rate of reduction in body weight, colon length, and colon weight in mice, oxido-inflammatory stress indices level [such as MDA levels, MPO activity and NO concentration (Owumi et al., 2020), pro-inflammatory cytokines, and chemokines] which have an established role in the growth of UC (Landskron et al., 2014). Ginger could also decrease the expression of iNOS, P65, p38, and NF- kB, which catalyze the production of NO. Reduced histopathological damages were also reported to decrease colonic neutrophil infiltration and mucosal ulcerations (Morris et al., 2003).
In vitro studies
There are many in vitro studies that confirm the effect of ginger in the treatment of inflammatory bowel disease. In addition to the previous studies, in 2017, Zhang et al. (2017) used ginger-derived nano lipids loaded with siRNA as a new path for siRNA drug delivery that could have fewer side effects for UC treatment in both in vitro and in vivo studies. The in vitro part was done on Caco-2BBE, RAW264.7, and Colon-26 cells, which were incubated with Ginger-derived nano vectors (GDNV). The result showed that Ginger-derived lipid vehicles (GVDLs) are biocompatible and have fewer effects on the viabilities of cell lines compared with Lipid nanoparticles (currently the favored vehicle for therapeutic siRNA delivery that causes cell stress, inflammation, and apoptosis). In addition, siRNA-CD98/GDLVs can decrease CD98 expression. Also, their results indicated that GDLVs could be developed as a nontoxic siRNA-delivery vehicle. GDLVs/siRNA-FITC were also taken up by cells by high efficacy, which means it can be used as a siRNA-delivery vehicle without using toxic transfection reagents (like Lipofectamine). The results suggest that GDLVs/siRNA-FITC has the potential to shift the current paradigm of siRNA delivery away from artificially synthesized nanoparticles toward the use of nature-derived nano vehicles from edible plants.
Liu et al. (2019) did research about the anti-inflammatory characteristics of AZ-SFE in vitro by determining NO production on lipopolysaccharide (LPS)-induced RAW264.7 cells. LPS-induced RAW264.7 macrophages are typically used to assess the anti-inflammatory influence in vitro. The in vitro study augmented the investigation of the anti-colitis activity of AZ-SFE in the TNBS-induced rat model. They concluded that the following in vitro study showed the potential of AZ-SFE for mitigating colitis by cutting down the oxidative stress, inhibiting inflammatory mediators, impeding the Th1 immune response, and managing iron homeostasis. As a result, AZ-SFE derived from traditional Chinese herbs could be a promising supplement for recent IBD therapy, and the precise mechanism requires more investigation.
Oral drug delivery is the most appealing pathway for UC treatment, because it has many benefits. Adaptable Single-step surface-functionalizing method was used by Zhang et al. (2018) to prepare PLGA/PLA-PEG-FA nanoparticles loaded with the active ginger compound, 6-shogaol (NPs-PEG-FA/6-shogaol). They utilized both in vitro and in vivo models. The result indicated that NPs-PEG-FA showed great biocompatibility both in vitro and in vivo. Subsequent cellular uptake experiments exhibited that NPs-PEG-FA could undergo effective receptor-mediated uptake by colon-26 cells and activated Raw 264.7 macrophage cells. Finally, their study illustrated a convenient, orally administered 6-shogaol drug delivery system that effectively targets colitis tissue, reduces colitis symptoms, and expedites colitis wound repair.
Human studies
Chronic inflammation and Oxidative stress play a key role in ulcerative colitis (UC) onset and severity. A randomized clinical trial in Iran by Bodaghi et al. (2019) examined the short-term effects of ginger on UC and patient’s quality of life.
Forty-six patients with active mild to modest UC randomly consumed 500 mg/day of dried ginger powder in four capsules or identical placebo capsules for 6 weeks. They examined the quality of life, and serum levels of Total anti-oxidant capacity (TAC), High-sensitivity C-reactive protein (hs-CRP), TNF-α, Malondialdehyde (MDA), and nuclear factor kappa B (NF-κB) and the results showed ginger decreased TNF-α and serum MDA factor levels. There were no important changes in inflammatory factors or quality of life. It was concluded that consumption of 2 g of dried ginger root powder for 6 weeks reduces oxidative stress in patients with mild to moderate UC. A 2021 meta-analysis of ginger supplementation on biomarkers of oxidative stress such as glutathione peroxidase (GPx), malondialdehyde (MDA), and total antioxidant capacity (TAC) (Sheikhhossein et al., 2021) showed that ginger supplementation reduced MDA and increased GPx but the outcomes demonstrated that no significant changes in TAC activities. Also, according to the study by Atashak et al. (2011a), Atashak et al. (2011b) ginger un take compared to placebo did not result in a significant change in serum glucose, lipid, MDA and TAC levels.
Another double-blind and randomized clinical trial by Hashemi et al. (Abbas 2020) observed the relationship between ginger and UC. Forty-five patients with mild to modest ulcerative colitis who were separated into two groups received 2,000 mg/day of ginger powder in four capsules or a similar placebo for 12 weeks, and oxidative stress and inflammatory indices were evaluated. The result indicated that the Serum TNF-α levels, Serum MDA, level of hs-CRP, and quality of life were increased considerably after ginger use in cases with UC. This randomized placebo-controlled trial indicated that ginger supplementation of 2000 mg daily could enhance the inflammatory signs of the disease.
Jun et al. (2015) investigated the therapeutic effect of acupuncture combined with umbilical ring point ginger-partition moxibustion for ulcerative colitis of the spleen-kidney yang deficiency type and its impact on related inflammatory factors in ulcerative colitis of the spleen-kidney yang deficiency type. After therapy, serum TNF- and IL-8 levels were shown to be lower in both the control groups and the treatment group, and the reduction in the treatment group surpassed the control group. Acupuncture coupled with ginger-partition moxibustion at the umbilical ring point was shown to be efficacious and safe in the treatment of UC (Table 3), but the number, quality and the overall sample size is too small for definitive conclusions; on the other hand, there is evidence that moxibustion is an inconclusive treatment for UC (Lee et al., 2010). The benefits of ginger in IBD are summarized in Figure 1.
TABLE 3
| Author/year | Human studies design | Dose | Duration | Findings | Reference |
|---|---|---|---|---|---|
| Nikklah-Baelaghi et al., 2019 | 46 patients with active UC | 500 mg/d dried ginger powder in four capsules | 6 weeks | ginger reduced serum MDA factor and TNF-α levels | Nikkhah-Bodaghi et al. (2019) |
| No important changes in inflammatory factors and quality of life | |||||
| Usage of 2 g of dried ginger root powder for 6 weeks decreased oxidative stress in cases with mild to modest UC | |||||
| Hashemi 2020 | 45 patients with mild to moderate UC randomly divided into two groups | 2,000 mg/day of ginger powder in 4 capsules or placebo | 12 weeks | The quality of life, Serum MDA, Serum TNF-α levels and level of hs-CRP was increased considerably subsequent to ginger use in cases with UC. | Abbas (2020) |
| Jun et al., 2015 | 60 patients with UC of spleen-kidney yang deficiency type | Group1: Live combined Bifidobacterium, Lactobacillus, and Enterococcus capsules, orally | 4 weeks | The serum TNF-α and IL-8 levels were lowered in both groups. Acupuncture coupled with umbilical ring point ginger-partition moxibustion is effective and safe for the treatment of UC of spleen-kidney yang deficient type | Jun et al. (2015) |
| Group2: Live mixed Bifidobacterium, Lactobacillus, and Enterococcus pills, and had acupuncture and umbilical ring point ginger-partition moxibustion simultaneously |
The characteristics of the included human studies on the effect of ginger in IBD.
Abbreviations: MDA, malondialdehyde; UC, ulcerative colitis; TNF-α, tumor necrosis factor; Crp, C-Reactive Protein; IL-8, interleukin-8.
FIGURE 1
Conclusion and future perspective
In inflammatory conditions of IBD, the migration of inflammatory cells into the colon, such as neutrophils, results in the production of oxidative stress, ROS, and lipid peroxidation. These events affect cell macromolecules and create imbalances in membrane integrity, which can resulting in chronic inflammation, and ulcers (Ajayi et al., 2015). Due to its spasmolytic properties, which are mediated by calcium channel blockade, ginger also has protective effects against UC (Ghayur and Gilani 2005). By inhibiting the peroxidation of lipids, p38 expression, and ginger active compounds also reduce MDA, hydrogen peroxide, and protein carbonyl in a dose-dependent manner (Zhang et al., 2016; Ajayi et al., 2018). A ginger supplement greatly decreased MDA but did not affect TAC. As a result, it may drastically lower the combined SCCAIQ and IBDQ scores (Nikkhah-Bodaghi et al., 2019).
Human studies have some experimental restrictions, such as the high expense of colonoscopies and tissue biopsies. Patients also reported a few minor side effects from taking ginger supplements, such as heartburn and a strong odor. It appears that the supplementation’s dosage and duration were too low to result in a noticeable improvement in UC patients, but it improved some aspects of oxidative stress and disease activity. Altogether, more clinical trials using various ginger supplementation doses and durations are required (Nikkhah-Bodaghi et al., 2019).
In summary, ginger and its components efficiently treated IBD by targeting the inflamed intestinal mucosa, blocking damaging factors such as IFN-γ, IL-17, and TNFα despite promoting healing factors like IL-22, IL-10, and TGF-β. Also, ginger had no known side effects and no known herb or drug interactions. These natural products can easily be developed for comprehensive production and may act as an effective therapeutic strategy for preventing and treating IBD. However, further experiments are required to evaluate the safety and efficacy of ginger in IBD treatment, to evaluate the effect of different dosages and durations, to check its regulatory effects on the gut microbiota and, to realize if genetic diversity and environmental agents can influence these activities. Most importantly, RCTs must be designed to study the effect of ginger on Crohn’s disease. The result of these studies may open up a novel path in gastrointestinal disorders treatment.
Statements
Author contributions
Study concept and design: NiD. Acquisition of data: TM, SO-T, SN, NiD, ZT, and MP. Drafting of the Manuscript: FS, FM, AO, NoD, MV, FN, and SD. Critical revision of the manuscript for important intellectual content: SN. Study supervision: NiD.
Conflict of interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Publisher’s note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.
Abbreviations
APC, adenomatous polyposis coli; AUC, acute ulcerative colitis; AZ-SFE, supercritical fluid extract of Angelica sinensis and Z. officinale roscoe; CD, Crohn’s disease; Con.A, concanavalin A; COX-2, cyclooxygenase-2; DSS, dextran sulfate sodium; GDNP, ginger loaded nanoparticles; GDNPs 1, ginger derived nanoparticles (8/30%); GDNPs 2, ginger derived nanoparticles (30/45%); GDNV, ginger-derived nano vectors; GE, ginger extract; GVDLs, ginger-derived lipid vehicles; IL-1β, interleukin-1β; iNOS, inducible nitric oxide synthase; Lcn-2, lipocalin-2; LPS, lipopolysaccharide; MAPK, mitogen activated protein kinase; MDA, malondialdehyde; MOR, Moringa oleifera; MPO, myeloperoxidase; MTT, [3-(4,5-dimethythiazol-2-yl)-2,5-diphenyl tetrazolium bromide]; NF-kB, nuclear factor kappa-light-chain-enhancer of activated B cells; NIM, nimesulide: a selective COX-2 inhibitor; NO, nitrogen monoxide; PCO, protein carbonyl; TNBS, trinitrobenzene sulfonic acid; TNF-α, tumor necrosis factor; UC, ulcerative colitis; ZER, zerumbone: a sesquiterpenoid with very large amounts detected in rhizomes.
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Summary
Keywords
Z. officinale, ginger, ulcerative colitis, inflammatory bowel disease, natural compound
Citation
Sadeghi Poor Ranjbar F, Mohammadyari F, Omidvar A, Nikzad F, Doozandeh Nargesi N, Varmazyar M, Dehghankar S, Vosoughian F, Olangian-Tehrani S, Nanbakhsh S, Mansourian T, Deravi N, Tutunchian Z, Salahi M, Poudineh M and Ghayyem H (2022) Zingiber officinale (Ginger) as a treatment for inflammatory bowel disease: A review of current literature. Front. Drug. Discov. 2:1043617. doi: 10.3389/fddsv.2022.1043617
Received
13 September 2022
Accepted
21 November 2022
Published
08 December 2022
Volume
2 - 2022
Edited by
Rajeev K. Tyagi, Institute of Microbial Technology (CSIR), India
Reviewed by
Chengxin Sun, Zunyi Medical University, China
Joshua R. Sacher, Photys Therapeutics, United States
Updates
Copyright
© 2022 Sadeghi Poor Ranjbar, Mohammadyari, Omidvar, Nikzad, Doozandeh Nargesi, Varmazyar, Dehghankar, Vosoughian, Olangian-Tehrani, Nanbakhsh, Mansourian, Deravi, Tutunchian, Salahi, Poudineh and Ghayyem.
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*Correspondence: Niloofar Deravi, niloofarderavi@sbmu.ac.ir
†These authors have contributed equally to this work
This article was submitted to Anti-inflammatory and Immunomodulating Agents, a section of the journal Frontiers in Drug Discovery
Disclaimer
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.