1. Introduction
Natural products have provided successful alternatives in cancer chemotherapy through regular identification of unique potential targets, with specificity or selectivity for cancer cells [1,2]. Developing natural-based anticancer agents plays an important role in the design of effective and safe strategies to combat cancer [3]. Additionally, it is a reasonable candidate to overcome chemotherapy multidrug resistance, which is the most common conventional approach in cancer treatment [4,5].
The housefly Musca domestica is an important medical insect with highly effective immune defense mechanisms and is rarely infected even when reared under large-scale and high-density conditions [6]. M. domestica larvae are considered an excellent source of protein, fats, minerals, vitamins, and high levels of amino acids and have been used in Chinese and Korean traditional medicine [7,8]. M. domestica has exhibited numerous bioactive properties such as antibacterial [9], anti-atherosclerosis and pro-inflammatory responses [10], and immunomodulatory [11], antiviral [12], antifungal [13], antioxidants, and anticancer activities [14]. The chemical composition of M. domestica larval hemolymph is very complex, mainly formed of antimicrobial peptides (AMPs), lysozyme, and agglutinin [15,16]. One of the predominant AMP families is cecropin, which was first isolated from bacterial-challenged giant silk moth, Hyalophora cecropia, pupae [17]. Numerous cecropins have been identified from different species of insect orders (Hymenoptera, Diptera, Coleoptera, Lepidoptera, and Isoptera) [18,19] and other organisms including mammals [20]. These are α-helix linear peptides of approximately 30–35 amino acid residues without cysteine residues and are divided as cecropins A, B, and D [21,22]. They are relatively small proteins that are active against both Gram-positive and Gram-negative bacteria. Cecropins act as active inhibitors of Trypanosoma [23] and Plasmodium [24], inhibiting the proliferation of tumor cell lines [25]. Cecropins have exerted antitumor capabilities against a variety of cancer cell types, including colon cancer [26], leukemia [27], small cell lung cancer [28], gastric carcinoma [29], bladder cancer [25], and hepatocellular carcinoma [30]. Cecropin A is an AMP with a stabilized α-helical structure [31] and has antifungal activity against Beauveria bassiana in silkworm larvae [32]. Cecropin with anti-inflammatory activity has been identified in butterfly, Papilio xuthus [33], and Black fly, Simulium bannaense, salivary glands [34].
The biological impacts of M. domestica larval hemolymph such as anticancer and antioxidant potentials have been recently reported by LPS stimulation [14]. Thus, it is worth investigating possible natural and safe strategies to activate and stimulate the larval extracts’ biological pathway to maximize their anticancer efficiency. Herein, curcumin was selected based on its pharmacological profile, and because it is superior to the traditional chemotherapeutic drugs, owing to its anti-inflammatory, antioxidant, and antitumor properties [35,36], in addition to the minor toxicity [37,38]. Curcumin was reported as an effective natural bio-stimulator that activated many biochemical processes in Apis mellifera [39].
Taking into consideration the biological activities of curcumin, we hypothesized here that curcumin may increase the anticancer potential of M. domestica larval hemolymph. Thus, the current study aimed to maximize the effects of both curcumin and M. domestica larval hemolymph for the enhancement of the resulting anticancer potential, and hence the link of cecropin upregulation in the hemolymph following the curcumin injection was investigated.
2. Materials and Methods
2.1. Insects
M. domestica larvae were provided by the Institute of Medical Entomology, Dokki, Giza, Egypt. Larvae were maintained in the insectary of the Zoology Department, Faculty of Science, Menoufia University under laboratory conditions of 26 ± 1 °C; photoperiod: 14 L:10 D; and relative humidity: 60 ± 10% until pupation. After eclosion, adult flies were fed and maintained at 25 °C under 12 h light/12 h dark cycles (LD12:12) [40].
2.2. Curcumin Injection and Hemolymph Collection
Newly molted third instar larvae were injected into the hemocoel with 100 ng of curcumin per larva in a saline solution (Sigma-Aldrich, St. Louis, MO, USA) using a sterile, thin-needled micro-syringe. Hemolymph was extracted by cutting the anterior part of larvae with sterile fine scissors in a previously chilled Eppendorf tube. Larval hemolymph was collected at 4, 8, and 24 h post-injection and from normal larvae as controls.
2.3. Cecropin Evaluation
2.3.1. Nano LC–MS Analysis of M. domestica Cecropin Protein
Nano LC–MS analysis was conducted for the quantification of cecropin peptide in control and injected larvae at the Proteomics and Metabolomics Unit, 57,357 Children’s Cancer Hospital, Cairo, Egypt using a TripleTOF 5600 + (AB Sciex, Ontario, Canada) connected at the front end with a Eksigent nanoLC 400 autosampler with an Ekspert nanoLC 425 pump according to [41,42,43]. Hemolymph samples were compared against standard cecropin A peptide (AS-24009, AnaSpec, San Jose, CA, USA).
2.3.2. RNA Extraction, cDNA Synthesis, and Quantitative PCR of M. Domestica Cecropin Gene (MdCecA)
Total RNAs were extracted from hemolymph using Trizol reagent (Thermo Fisher Scientific, Austin, TX, USA) according to the manufacturer’s protocol. Specific primers for cecropin were designed by primer3 software and their sequences are illustrated in Table 1. The β-actin gene was used as an endogenous house-keeping gene [44]. RNA purity was estimated using spectrophotometric measurements (Milton Roy spectrophotometer, Spectronic 1201, Houston, TX, USA) at A260/280 absorbance, and the integrity was checked by agarose gel electrophoresis. The first-strand cDNA synthesis was made using M-MLV Reverse Transcriptase (Promega, Madison, WI, USA) according to the manufacturer’s instructions.
The qPCR was carried out using the Maxima SYBR Green/ROX qPCR Master Mix (SABiosciences™, Applied Biosystems, Foster City, CA, USA). The incubation of reaction mixtures was performed at 95 °C for 10 min, followed by 40 cycles at 95 °C for 20 s, annealing at 58 °C for one minute, and finally one minute of extension at 72 °C. The relative expression ratios of MdCecA were calibrated against the control samples.
2.4. In Vitro Anticancer Activity
2.4.1. Maintenance of Cell Lines
The Holding Company for Biological Products and Vaccines (VACSERA), Giza, Egypt, provided cell lines of human breast cancer (MCF-7) and normal African green monkey kidney (Vero). A hemocytometer was used to quantify the number of cells per milliliter, which was then computed using the following equation:
Cells/mL = 104 × (Average count per square) × (Dilution factor)
Dulbecco’s modified Eagle’s medium (DMEM) supplemented with 10% fetal calf serum, 100 U/mL penicillin, and 100 g/mL streptomycin was used to maintain and culture the cell lines. At 37 °C, cells were incubated in T25 culture flasks at a density of 2 × 104 cells/cm2 in a humidified 5% CO2 environment. Every 48 h, the medium was changed. An inverted microscope was used to verify that the cells were 75 percent confluent. After trypsinization (0.025 percent trypsin and 0.02 percent EDTA), cells were collected and washed twice with phosphate-buffered saline (PBS). All of the tests were carried out in triplicate. All reagents and media were acquired from an Egyptian Lonza distributor.
2.4.2. Cytotoxicity Assay
The cytotoxicity of the hemolymph was assessed on MCF-7 cells, as well as the Vero normal green monkey kidney cells. The extracted hemolymphs at 4 and 8 h post-curcumin injection and the solution of curcumin (100 ng) were tested via serial dilutions (0–500 μg/mL) using 3-(4,5-dimethyl
A percentage OD (absorbance) test/OD Control = (1 − OD test/OD Control) 100
Graphpad Prism software was used to perform the inhibition curve and compute the 50% maximum inhibitory concentration (IC50) (San Diego, CA, USA).
2.4.3. Cell Cycle Analysis
The effect of larval hemolymph injected with curcumin on the proliferation of cells was evaluated by measuring the distribution of the cells in the different phases of the cell cycle using flow cytometry. Cells were treated with 30, 60, and 100 μg/mL of hemolymph from control and injected larvae (4 and 8 h post injection). Cells were harvested and pelleted in 1 mL of cold PBS before being fixed in cold 75 percent ethanol for 24 h at 40 °C. PBS was used to wash the fixed cells. RNase was added, and cells were incubated at 37 °C for 30 min before being resuspended in a propidium iodide (1 mg/mL) staining solution and incubated in the dark at room temperature for 5–10 min. A fluorescence-activated cell sorter flow cytometer was used to examine the cells (Coulter Epics XL, Beckman Coulter, CA, USA).
2.4.4. Apoptosis Detection
MCF-7 cells were inoculated into a 6-well culture plate and incubated at 37 °C. The next day, after the medium was removed, 2.0 mL of RPMI 1640 complete medium with the 30, 60, and 100 μg/mL of tested hemolymph samples were added and incubated. After digestion with trypsin, cells were collected, washed three times in PBS, and suspended in 0.5 mL of binding buffer (10 mM HEPES/NaOH, 140 mM NaCl, 2.5 mM CaCl2, pH 7.4). At room temperature, FITC-labeled Annexin V (50 mg/mL, 5 mL) and PI (50 mg/mL, 5 mL) were added and then incubated for 30 min in the dark. Flow cytometry (Coulter Epics XL, Beckman Coulter, CA, USA) and its associated software were used to measure the apoptosis rate immediately.
2.5. Data Analysis
Nano LC–MS data analysis was performed using Analyst TF 1.7.1 and for data acquisition (Sciex software). Raw MS files from the TripleTOFTM 5600+ were analyzed by Protein pilot (version 5.0.1.0, 4895) and the Paragon Algorithm (version 5.0.1.0, 4874). Results were expressed as the mean ± SD of triplicates from three separate experiments. Statistical significance was determined using one-way analysis of variance (ANOVA), using SPSS software version 21.1 (Chicago, IL, USA). The values with p < 0.05 were considered significant.
3. Results
3.1. Insects’ Mortality and Morphology Changes
No morphological alterations were observed among the groups. The mortality was recorded without significant differences between groups (0.1 ± 0.04%).
3.2. MdCecA Altered Expression
3.2.1. Quantification of MdCecA Peptide
Changes in MdCecA peptide levels were detected in hemolymphs of control and curcumin-injected larvae at different intervals using Nano LC/MS (Figure 1A). The results revealed a significant (p < 0.05) increase in the protein levels in the larval hemolymph over all tested time points with respect to the control. The highest level was observed at 8 h (2.56 folds) followed by 4 h (1.86 folds) and 24 h (1.36 folds) post-injection.
3.2.2. Transcriptional Responses of M. Domestica Larvae to Curcumin Injection
The transcriptional level of MdCecA in larval hemolymphs was measured by qRT-PCR. The MdCecA transcripts were increased after 4 and 8 h of injection. However, the upregulation was stopped and reversed after 24 h post-injection (Figure 1B). The upregulation was estimated as 4.45- and 12.61-fold for 4 and 8 h, respectively, relative to the untreated larvae.
3.3. Anticancer Effects of Curcumin-Injected M. Domestica Larval Hemolymph
3.3.1. Cytotoxicity
However, a significant elevation in cecropin A at the levels of protein and transcripts was reported at both 4 and 8 h post-injection intervals. The cytotoxic effect of control and curcumin-injected larval hemolymphs was investigated in vitro against MCF-7 and Vero cells using an MTT assay. Uninjected larval hemolymph exhibited a lower cytotoxicity than the injected ones toward the cancer cells (MCF-7) (Figure 2), accounting for IC50 of 106 ± 2.9 and 388 ± 9.2 μg/mL for the hemolymphs of the injected larvae at 4 and 8 h, respectively. The IC50 of curcumin was about 321 µg/mL; however, the control larval hemolymph revealed IC50 > 500 μg/mL and the viability showed about 80% corresponding to 500 μg/mL. On Vero normal cells, no cytotoxicity was observed up to a concentration of 500 µg/mL in control and curcumin-injected larvae.
3.3.2. DNA Content and Cell Cycle Distribution
Cell cycle analysis of treated (4 h, Figure 3A, and 8 h, Figure 4A, post-curcumin injection) and control MCF-7 cells was performed. Among the 4 h group (Figure 3B,C), the accumulations of cells at the sub-G1 phase revealed significant (p < 0.05) apoptotic populations (~20% and 38 for 60 and 100 μg/mL, respectively). Moreover, G2/M arrest was significantly detected with ~33% and 48 for 60 and 100 μg/mL, respectively, compared to 10.5% in untreated cells. Moreover, among the 8 h group (Figure 4B,C), significant accumulations of the apoptotic phase (~29.45 and 55.23% for 60 and 100 μg/mL, respectively) and G2/M phase (~12.76 and 38.49% for 60 and 100 μg/mL, respectively) were recorded.
3.3.3. Apoptotic Effect on MCF-7
Following annexinV/propidium iodide labeling, flow cytometric analysis was carried out (Figure 5A,B). Among the groups tested at 4 h, apoptotic events were increased by about 21 and 37% at concentrations of 60 and 100 μg/mL, respectively, when compared to 1.8% in untreated cells (Figure 5C). However, necrosis was significantly observed in 100 μg/mL (4.3%) compared with the untreated group (1.3%).
Moreover, a significant increase in the apoptotic MCF-7 events after hemolymph treatment, 8 h post-curcumin injection, was observed with about 1.85 and 2.78 % for 60 and 100 μg/mL, respectively, when compared with 0.92% in untreated cells (Figure 5D). However, a remarkable dose-dependent increase in necrotic cells was counted (5.49, 7.64, and 21.44% at concentrations of 30, 60, and 100 μg/mL, respectively) compared with control cells (1.67%).
4. Discussion
Insects are a large, untapped, and unexplored resource of potentially useful compounds for modern medicine [10]. Several active proteins and peptides with diverse biological activities including antibacterial, antifungal, and antiviral properties were reported in insects [30,45]. Identification, isolation, and application of these agents will eventually benefit public health services and bio-pharmaceutical industries. Previous reports showed that housefly larvae have antitumor activities that have attracted a great deal of interest during recent years. A number of studies have reported that the extract of M. domestica hemolymph can inhibit the growth of tumor cells [46,47], whereas Hou et al. [9] proved that crude extract from M. domestica exhibited antitumor activity. Wang et al. [44] purified a protein fraction from housefly larvae, which had an inhibitory activity against the human lung cancer cell line with no toxicity to chick embryo fibroblast-like cells.
Following curcumin injection, a significant increase in cytotoxicity was observed, indicating its effective role in enhancing the anticancer potential of M. domestica larval hemolymph. Curcumin has been used for hundreds of years as a flavor, dye, and preservative [48] and was reported to possess therapeutic properties, including anti-inflammatory, anticancer, and antioxidant activities [48,49]. A similar observation was reported by Strachecka et al. [39] who examined the influence of curcumin on Apis mellifera workers and found that curcumin-treated workers had a higher protein concentration, elevated antioxidant enzymes, and other biomarkers activities. Curcumin was proven to be an effective natural bio-stimulator, improving apian health due to the activation of many biochemical processes involved in the formation of apian resistance [39]. There is a lack of publications concerning the role of curcumin in insects; however, other reports related to this subject are available in mammals. Curcumin has been reported to play an anticancer role in several tumor models, including glioblastoma, liver, colorectal, lung, ovarian, breast, oral, and gastric cancer [34,50,51,52,53,54,55,56]. The underlying mechanisms have been explained by the inhibition of proliferation, angiogenesis, invasion and metastasis of cancer cells, or apoptosis induction by curcumin [34,57,58].
The enhanced cytotoxicity may be due to the activation of internal mechanisms in insects such as proteolytic cascades and the activation of cellular defense mechanisms that may lead to the increase in secreted cecropin in the hemolymph [59,60]. In this study, following larval injection with curcumin, the higher concentration was found in the larval body at 4 h together with the elevated levels of cecropin inducing the highest cytotoxic effect against MCF-7. The interference of curcumin as an enhancer of cecropin cytotoxicity may be suggested. However, at 8 h, curcumin levels might be less than those at 4 h due to the absorption and metabolism by the insect, suggesting the lower enhancement or additive effect of cecropin cytotoxicity.
Apoptosis is a fundamental cellular event that has been implemented in tumor diagnosis and therapy [61]. It is a form of cell death mediated by the internal cellular machinery and is tightly regulated by intrinsic and extrinsic pathways. It is a controlled cell suicide, making the target cells morphologically and biochemically distinct [62]. In the current study, curcumin-injected larval hemolymph significantly decreased the growth of MCF-7 cells via the induction of apoptotic cascade at a fast rate and the arrested cell cycle of MCF-7 in the G2/M phase [61]. Similar results were obtained by Qian et al. [63] on insect tea against human tongue carcinoma TCA8113 cells. The formation of apoptotic bodies was observed along with the sub-G1 DNA (apoptotic cells) accumulation in cells treated with curcumin-injected larval hemolymph. Several antitumor agents arrested the cell cycle and induced apoptotic cell death.
The expression pattern of cecropin after curcumin injection at both protein and mRNA levels is consistent with the findings of Sackton et al. [64], who proved that cecropin showed duplication rates of the increase in M. domestica in response to the bacterial infection [64]. However, there are no reports concerning cecropin expression especially after curcumin stimulation. The time-dependent expression pattern of cecropin was reported to be induced rapidly after infection with Gram-negative and Gram-positive bacteria, fungi, and even any foreign body entering the insect body [65,66,67]. It can be detected from 2–6 h to 24–36 h after an immune stimulation [68,69]. Cecropin is upregulated over the time course of an infection, and peak activity is reached days after infection; such an interval differs from insect to insect [70]. The expression of the genes encoding cecropins was induced simultaneously shortly after infection by bacteria [71,72] and were expressed at high levels in insect larvae under bacterial infection [73]. The expression pattern of the cecropin genes does not show a constant pattern in all insects. In silkworm, its expression is not identical across different types of microbial infection [74,75], suggesting that different signaling pathways may be involved in the regulation of immune gene expression in a distinct manner. The expression levels of cecropin mRNA peaked at the first days post-oral infection with Gram-negative bacteria, E. coli, and relatively decreased with time in salivary glands of Simulium bannaense [76]. Cecropin expression levels were significantly upregulated after the bacterial injection [77,78]; however, no increase in gene transcription was observed at 24 h after the injection in Anopheles coluzzii [79]. Concurrently, the current data could indicate the capacity of M. domestica hemolymph to express a highly effective production of cecropin at 8 h post-curcumin injection as a stressor where it gradually decreases toward normal levels with time. This decline may be due to the absorption and metabolism of injected curcumin by the insect body. Additionally, protein stability, post-transcriptional alterations, and mRNA degradation may explain the observed differences in peptide expression [14].
Peptides related to the Cecropin family have been proven as effective antitumor agents in numerous studies, although signaling pathways involved in these antitumor activities have not been established yet. Cecropin binding to the cancer cell surfaces leads to pores formation resulting in cell lysis and cellular disruption [80], most likely cecropins possessing a destructive effect on cancer cell membranes. Apoptosis induction by cecropins has been explained by the upregulation of caspase-3 and caspase-9, prior to cell destruction [34]. The latter is a caspase initiator and a direct activator of caspase-3, an effector enzyme responsible for protein hydrolysis of the membrane surrounding the cell nucleus. This can induce the morphological changes, indicating cellular apoptosis, and may be attributed to cecropin concentrations [80]. The increased concentration of reactive oxygen species in cancer cells in the presence of cecropin may also be a causing factor for cell apoptosis [80]. Cecropin A has been reported to have antitumor properties against leukemia cell lines, which was manifested by the proliferation inhibition [81] with no cytotoxic properties against normal cell lines [80]. Cecropin A has been shown to cause the downregulation of the phosphorylation-related signaling pathway in regard to the regulation of cell division, cell cycle, or transcription regulation [81]. Finally, the underlying enhanced anticancer mechanism of M. domestica larval hemolymph after curcumin stimulation on human cancer cell lines may be attributed to the induction of apoptosis by regulating protein and mRNA expressions of cecropin, which may be a target for breast cancer therapy. Moreover, further in vivo studies of stimulated M. domestica larval hemolymph are required to assess the underlying anticancer effects. Furthermore, the improvement of the curcumin entry method to the larvae for easier and applicable pharmaceutical large-scale applications should be considered.
5. Conclusions
To our knowledge, this is the first time we have reported how curcumin can naturally stimulate and enhance the anticancer effects of M. domestica larval hemolymph with evidential in vitro anti-proliferative and apoptotic signs supporting its anticancer potential.
Conceptualization, S.M. and I.M.E.-G.; methodology, A.H. and S.M.; software, S.M.; validation, I.M.E.-G., S.M. and S.H.E.-N.; formal analysis, A.H.; investigation, S.M.; resources, S.U., A.G.A.-S. and A.H.; data curation, H.R.E.-S.; writing—original draft preparation, S.M.; writing—review and editing, S.A.M.K.; visualization, S.M.; supervision, I.M.E.-G., S.M. and S.H.E.-N.; project administration, I.M.E.-G.; funding acquisition, S.U and A.G.A.-S. All authors have read and agreed to the published version of the manuscript.
This research was funded by King Khalid University, Abha, Saudi Arabia and the Research Center for Advanced Materials Science (RCAMS) at King Khalid University, Abha, Saudi Arabia, grant no: RCAMS/KKU//008/21 and “The APC was funded by RCAMS/KKU//008/21”.
All procedures in this study were in accordance with the ethical standards of the Institutional Research Committee, Menoufia University, Egypt (MUFS-F-GE-8-20).
All data generated or analyzed during this study are included in this article.
Authors acknowledge the support and funding of King Khalid University through the Research Center for Advanced Materials Science (RCAMS) under grant no: RCAMS/KKU//008/21.
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
Not applicable.
Footnotes
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Figure 1 MdCec expression of control and curcumin-injected M. domestica larval hemolymphs after 4, 8, and 24 h of injection. (A) Cecropin quantification analyzed by Nano LC–MS/MS. (B) Relative MdCec-mRNA expression analyzed by qRT-PCR. # indicate significant difference (p < 0.05). Data were illustrated as mean ± SD, (n = 3).
Figure 2 The viability of control and curcumin-injected M. domestica larval hemolymph on MCF-7 cell lines using the MTT assay. The incubation with serial concentrations (3.9–500 µg/mL) of the tested larval hemolymphs was performed in triplicate. Data were illustrated as (mean ± SD) of three separate experiments.
Figure 3 Effect of different M domestica hemolymph concentrations, 4 h post-curcumin injection (A), on the cell cycle distribution of treated and control MCF-7 cells. The cell cycle phases were analyzed according to DNA contents after propidium iodide (PI) labeling (n = 3), (B). Data were illustrated as mean ± SD, # shows the significant increase with respect to the control (p < 0.05), (C).
Figure 4 Effect of different M domestica hemolymph concentrations, 8 h post-curcumin injection (A), on the cell cycle distribution of treated and control MCF-7 cells. The cell cycle phases were analyzed according to DNA contents after propidium iodide (PI) labeling (n = 3) (B). Data were illustrated as mean±SD; # show the significant difference (p < 0.05) (C).
Figure 5 Effect of different M. domestica hemolymph concentrations, 4 h (A) and 8 h (B) post-curcumin injection, on the incidence of apoptosis/necrosis in treated and control MCF-7 cells. The flow cytometric dot-plot was analyzed after annexinV/propidium iodide (PI) labeling, 4 h (C) and 8 h (D). Data were illustrated as mean ± SD (n = 3). # shows the significant increase (p < 0.05).
Sequences of the primers used in the experiment.
| Primer | Accession No. | Forward (5′–3′) | Reverse (5′–3′) |
|---|---|---|---|
| MdCecA | AF416602 | CGGAGGAAACAATCGCAAAT | GTAGCATCGCGGGTATGTTG |
| β-actin | JN969088 | 5ACACACCAAAATGTGCGACG | 5′CGGTGGTGGTGAACGAGTAA |
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; Hassab El-Nabi Sobhy 1 ; Hawash Asmaa 2 ; El-Seedi, Hesham R 3 ; Khalifa Shaden A. M. 4 ; Ullah Sami 5 ; Al-Sehemi, Abdullah G 5
; El-Garawani, Islam M 1
1 Department of Zoology, Faculty of Science, Menoufia University, Menoufia 32511, Egypt; [email protected] (S.M.); [email protected] (S.H.E.-N.); [email protected] (A.H.)
2 Department of Zoology, Faculty of Science, Menoufia University, Menoufia 32511, Egypt; [email protected] (S.M.); [email protected] (S.H.E.-N.); [email protected] (A.H.), Department of Bioscience, Faculty of Dentistry, Sinai University, Ismailia 41632, Egypt
3 Department of Chemistry, Faculty of Science, Menoufia University, Menoufia 32511, Egypt, International Joint Research Laboratory of Intelligent Agriculture and Agri-Products Processing, Jiangsu University, Zhenjiang 212013, China, School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
4 Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, S-106 91 Stockholm, Sweden; [email protected]
5 Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; [email protected] (S.U.); [email protected] (A.G.A.-S.), Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia