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*Corresponding Author: Siavash Hosseinpour Chermahini, Department of Bioprocess Engineering, Faculty of Chemical Engineering, Universiti Teknologi, Malaysia, 81310 Johor Bahru, Johor, Malaysia.
Citation: Siavash H. Chermahini, Fadzilah A. A. Majid, Azila A. Aziz and Anvari R., (2021) The tower of Babylon – bioreactor. J, Biotechnology and Bioprocessing 2(7); DOI: 10.31579/2766-2314/044
Copyright: © 2021, Siavash Hosseinpour Chermahini, This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Received: 16 May 2021 | Accepted: 13 July 2021 | Published: 20 August 2021
Keywords: niosome, human skin fibroblast, inflammation, IL-6, TNF-α, bromelain
The topical delivery of bromelain as an anti-inflammatory solution for skin inflammation has attracted the attention of researchers. Due to the skin barrier issue, a new method was designed for the effective delivery of specific doses of bromelain to the desired action sites. A niosome was selected as a novel and practical transdermal vehicle for the delivery of bromelain to inflamed sites. In this regard, a lipopolysaccharide (LPS)-induced human skin fibroblast (HSF1184) cell line was assembled in-vitro as a simulated model. The levels of interleukin-6 (IL-6) and tumour necrosis factor alpha (TNF-α), the two immune-modulatory regulators of cell responses to inflammation, were measured to determine the response towards the niosome-encapsulated bromelain treatment. The results showed that the niosome-encapsulated bromelain significantly reduced the levels of IL-6 and TNF-α compared to the non-encapsulated bromelain, the vehicle (niosome) and the control.
Bromelain has demonstrated many beneficial properties in-vitro and in-vivo such as anti-oedematous, anti-thrombotic, and fibrinolytic properties. Most importantly, clinical trials of bromelain have confirmed its anti-inflammatory properties, which include, but are not limited to, breast engorgement during lactation [1]; osteoarthritis of the knee and hip [2, 3]; rhinosinusitis [4]; sepsis in children [5]; and urogenital inflammation [6]. Experimental evidence also exists on its effects on blood coagulation, where increases in the serum fibrinolytic activity and prostaglandin levels have been recorded due to a decrease in PGE2 and thromboxane A2. Essentially, this phenomenon is important for reducing inflammation [7]. However, there are many internal and external factors that trigger the transcription of pro-inflammatory cytokines in the human body, for instance, viral and bacterial infections, cuts, wounds, and obesity. Bromelain inhibits bacterial endotoxin LPS-induced NF-kB activity as well as the expression of PGE2 and Cox-2 [8]. To explain this mechanism, it was hypothesized that bromelain induces the cleavage of cell surface markers such as CD14 [9]. Among the secreted regulators of inflammation that are connected to the NF-kB pathways and that respond to bromelain are IFN-γ, TNF-α, IL-1β, and IL-6. Depending on the context and micro-environment, these regulators can either stimulate tumour growth and invasion or activate immune responses and cause tumour regression [10–13]. Experimental evidence derived from an analysis of peripheral blood mononuclear cells (PBMC) from healthy volunteers as well as mouse macrophages suggest that bromelain can activate TNF-α, IL-1β and IL-6 secretions in an IFN-γ-dependent mechanism [14,15]. However, the IFN-γ production is also encouraged by the presence of bromelain [16]. These data led to the hypothesis that bromelain has the potential to activate a healthy immune system to ensure a rapid response to pathogens and cellular stress. Nevertheless, in situations when immune cells have already been stimulated, bromelain reduces the secretion of TNF-α and IL-6 [17]. According to the summary by Chobotova et al. (2010) [18] on the influence of bromelain on inflammation regulation in relation to the cancer network, an over-production of cytokines is expected in inflammation-induced cases. A study has also found that in the presence of LPS, which can stimulate an acute inflammatory reaction, bromelain reduces elevated TNF-α, IL-1β, and IL-6 expressions in human PBMC [19]. The reduction of TNF-α and IFN-γ expressions has also been observed in inflamed tissues of patients with inflammatory bowel disease (IBD) that have been treated with bromelain [20]. The described data demonstrate that the effects of bromelain on cytokine expressions depend on the presence of inflammation-inducing conditions. This underlines the potential of bromelain for the treatment of inflammation-based pathologies. However, the challenge of the transdermal therapeutic system (TTS) is the stratum corneum (SC). The stratum corneum (SC) is the main barrier to the transportation of nutritional compounds via the skin [21]. In this regard, the delivery and release of bioactive materials like bromelain to different parts of the body are practically controlled by nanocarriers [22]. Several types of nanocarrier systems are available for TTSs such as vesicular phospholipid gels (VPG) [23], microspheres [24], nanospheres [25], nanoliposomes [26] liposomes [27] archaeosomes [28], complexes [29], ethosomes [30], dendrimers [31] nanoemulsions [32], and niosomes [33]. The effective delivery of bromelain to the affected sites depends on the delivery system used in the topical formulation [34]. Niosomes have specific characteristics for topical delivery [35] as theypossess high chemical long-term stability; high solubility for lipophilic and hydrophilic components; complete drug delivery; and large membrane flexibility to be effective against the SC barrier [36]. Niosomes are thermodynamically stable because they contain two volumes of liquids, namely water and oil, which are combined into a single phase by means of a surfactant to produce a non-ionic surfactant. Moreover, niosomes are highly compatible with biological systems and have no toxicity because of their non-ionic nature [37]. Due to the technological and physicochemical characteristics of niosomes, researchers have been motivated to consider them as ideal for carrying drugs for topical administration [38, 39]. For instance, Bouwstra and Hofland (1996) [40] loaded ellagic acid (EA) onto a niosome as an antioxidant drug application by transdermal administration. LPS is a suitable agent in stimulating inflammation since it can be used to induce inflammation both in-vitro and in-vivo. [41]. In order to detect LPS-induced inflammation, 2 cytokines, namely IL-6 and TNF-α, were selected in this study. IL-6 and TNF-αare immuno-modulating agents that act as regulators of host responses to infection, immune responses, inflammation, and trauma. They include various groups of soluble proteins, peptides, or glycoproteins which act as hormonal regulators or signalling molecules from nanomolar to picomolar concentrations [42]. Some of them are pro-inflammatory, being necessary for initiating the inflammatory response that is needed for the recruitment of granulocytes and, later on, lymphocytes, to fight disease. However, excessive inflammation is sometimes the pathogenicity of certain diseases. Other cytokines are anti-inflammatory and serve to reduce inflammation and promote healing [43]. Essentially, the definition of inflammation is that the cells are alive up to a certain point but will die subsequently. In this study, niosome-encapsulated bromelain was shown to be an effective compound that reduces the levels of IL-6 and TNF-α in LPS-induced inflammation of the human skin fibroblast (HSF1184) cell line. This is the first study to use niosome-encapsulated bromelain as an anti-inflammatory application. In order to determine the effectiveness of the treatment in HSF1184, the LPS-induced inflammation was treated with niosome-encapsulated bromelain after four hours of induction. The inflammation responses were measured after four hours and 24hours.
2.1 Chemicals and Cell Culture
All the chemicals used in this study were purchased from Sigma Aldrich and Merck, unless noted otherwise. These included Span (40, 60, 80), Labrasol, dicetyl phosphate, chloroform, DMEM, trypsin, penicillin, streptomycin, MTT solution, and DMSO (sterile and non-sterile). The bromelain was purchased from Merck, while the LPS from Escherichia coli (0111:B4) was purchased from Sigma Aldrich. The TNF-a kit (Catalogue Number RAB0476) and IL-6 kit (Catalogue Number RAB0307) were purchased from Sigma Aldrich (USA). Acetaminophen tablets (80 mg) were purchased from Guardian Pharmacy. HSF1184 was purchased from ATCC (USA) (Catalogue No. 107-75a). The cell culture grade chemicals and analytical grade chemicals used in this study were from Sigma Aldrich.
2.2 Preparation of Niosome-Encapsulated Bromelain
The niosome was created based on the protocol of Arora and Sharma (2010) [44] with minor modifications. First of all, a mixture of the vesicle-forming agents, i.e., the surfactant (40, 60, 80) and Labrasol, was dissolved in chloroform (a volatile organic solvent) in a round-bottom flask at a mole ratio of 1:1. The organic solvent was removed at a temperature of 45°C using a rotary evaporator (40 rpm), leaving a thin film of solid mixture deposited on the wall of the flask. This dried surfactant film was then rehydrated with 100 mL of aqueous-phase distilled water and was then agitated gently for an hour to yield multi-lamellar niosomes. The mixture was subjected to probe sonication using a Fisher Scientific sonicator at an amplitude of 40 m, energy of 2000 J, and power of 30 W for two minutes to yield uniform nanoparticles of niosomes. After selecting a span of 60 (40, 60, 80), different concentrations of bromelain (10, 30, 50, 70, 90) with different ratios of span/labrasol (50/50, 60/40, 70/30) were tested in this study.
2.3 Cell Line Culture and Maintenance
The cell culture and maintenance followed the protocol of Freshney (2008) [45]. The cells were cultured between passages 7 and 9. A water bath at 37ºC was used to pre-warm all the media and solutions before use. The cells were maintained routinely in a 75-cm2 flask. Moreover, the cells that had been cultured in Dulbecco’s modified Eagle’s medium (DMEM) containing penicillin (100 units/ml), streptomycin (100 lg/ml), and foetal bovine serum (10% v/v) were also incubated in a humidified incubator with 5% CO2/ 95% air at 37°C. The cells took between 24-48 hours to reach a confluent state. Cells from the exponential growth phase were used for the experimental work, where 2 x 105cells/mL were loaded into each well and incubated for 24 hours for cell attachment before the start of the experiment.
2.4 Inflammation Induction of HSF1184 with Serial Dilution of LPS
The serial dilution of LPS was modified from the protocol of Freshney (2008) [45]. After mixing 1mg of LPS with 1 mL of deionized water (DIW) according to the manufacturer’s instructions (stock LPS solution), serial dilutions of LPS were performed from 12 μg/mL to 1.5μg/mL (1.5 μg/mL, 3 μg/mL, 4.5 μg/mL, 6 μg/mL, 7.5 μg/mL, 9 μg/mL, 10.5 μg/mL, and 12 μg/mL) by diluting the solution in an appropriate volume of DMEM.
200μl of cells at a concentration of 2 x105 cells/well were seeded in a 96-well plate and incubated (5% CO2 and 37°C) for two days to reach a confluent state. Then, the cells were exposed to different concentrations of LPS (1.5, 3, 4.5, 6, 7.5, 9, 10.5, 12 μg/mL) for four hours or 24 hours using separate plates. The arrangement of the different concentrations of LPS on the plate is presented in Figure 3. DMEM was used as the blank, while cells without the LPS induction were used as the control. The cell induction was terminated accordingly after four hours and 24 hours.
2.5 Quantification of Cell Viability Using MTT Assay
The cell viability after the LPS induction was quantified using an MTT assay, as recommended by Freshney (2008) [45]. The assay was used to investigate the effects of niosome-encapsulated bromelain, niosome without bromelain (vehicle), and bromelain alone on the viability of HSF1184 cells treated with 1.5μg/mL of LPS-induced inflammation. The HSF1184 cells were seeded at 2-4 x 104 cells per/mL on two 96-well plates (4hrs and 24hrs) and were left to grow for two days to a confluent state, with media changes being made once per day. On completion of the confluence cells, inflammation was triggered in the plates treated with 1.5 μl/mL of LPS and the cells were incubated for four hours at 37°C in a humidified atmosphere with 5% CO2. Then, they were treated with acetaminophen (2μg/mL), bromelain (25μg/mL), niosome with 10% bromelain (20μl/mL), and niosome as a vehicle (20μl/mL) before being incubated for either four or 24 hours. The induced cells were washed twice with PBS, and 20μl of MTT solution (5mg/1ml PBS) was added to each experimental well. The plate was wrapped with aluminium foil and incubated for four hours. In continue, the MTT solution was carefully removed from all the wells using fine tips before being replaced with 200μl of non-sterile DMSO and mixed well with MTT formazan. A model ELX 808 BIO-TEK plate reader was used to measure the optical density of the colour formations of each sample at a wavelength of 570 nm and reference wavelength of 630nm. The procedure for 24 hours was similar to that for four hours. The average of six repetitions taken thrice from each sample was taken as the result. The OD was changed to a percentage of cell viability. Since the control (cells and DMEM) had 100% viability, the other treatments were compared to the control.
2.6 Quantification of IL-6 and TNF-α Concentrations
In accordance with Freshney (2008) [45] protocol, after each culture medium had been collected and centrifuged for three minutes at 3300 rpm and the supernatant had been separated, the resulting cells in the well plates (supernatant) were processed for IL-6 and TNF-α according to the manufacturer’s instructions for the ELISA protocol. The standards and samples were pipette into the wells of the kits. The IL-6 and TNF-α presented in the sample were bound to the wells by the immobilized antibody. The wells were then washed and biotinylated with the added anti-human IL-6 and TNF-α antibodies. After washing away the unbound biotinylated antibodies, HRP-conjugated streptavidin was pipette into the wells. The wells were again washed before a TMB substrate solution was added to the wells. The colour that developed was in proportion to the amount of IL-6 and TNF-α that had been bound. The colour of the stop solution changed from blue to yellow. The intensity of the colour was measured at 450 nm, and the result was based on pg/mL. From the standard curve equation (y = a * ln(x) +b) of both cytokines (IL-6 and TNF-α), since y (OD) = 450 nm and x is in pg/mL, then with various amounts of y in the above stated equation, various amounts of x in pg/mL were obtained.
2.7 Treatment of LPS-Induced Inflammation using Niosome-Encapsulated Bromelain
The LPS induction was carried out according to the protocol by Zdarilova et al. (2009) [46] with minor modifications, as described above. 2 – 4 x104 cells/mL were prepared at the exponential growth phase, and 200 μL of cell suspension was transferred to each well on two 96-well plates according to the plate design. The plates were then incubated in 5% CO2 at 37°C for two days with a daily change of medium until the cells reached a confluent state. Then, 1.5 μg/mL of LPS was added to each well and the plates were incubated for another four hours. After four hours of post induction incubation, the designated wells in both the four-hour and 24-hour plates were treated with acetaminophen (2μg/mL), bromelain (25μg/mL), niosome with bromelain 10% (20μl/mL), and niosome as a vehicle (20μl/mL), and then incubated again for another four hours or 24 hours.
The summary of the LPS induction and treatment with the niosome-encapsulated bromelain for both plates is presented in Figure 1. The cell viability was determined using the MTT assay as described above. The levels of both the IL-6 and TNF-α cytokines present in the wells were measured accordingly based on the above protocol.
In this experiment, two pairs of samples were compared using the t-Test because these two groups contributed a pair of scores. This statistical technique is often called a paired sample t-test or correlated t-test that tells whether there is a statistically significant difference in the mean scores for niosome-encapsulated bromelain and the other treatments. When P<0> it means that there is a significant difference.
4.1 Determination of suitable LPS Concentration to Induce Inflammation in HSF1184
A suitable concentration of LPS to induce inflammation in HSF1184 was determined based on the cell viability and IL-6 response. The purpose was to select the lowest concentration of LPS that would cause inflammation on the cells without causing cell death.
As shown in Figure 2, the HSF1184 cell line was treated with different concentrations of LPS to induce inflammation after 4 hours and 24 hours. Then, the percentage of viable cells was calculated. By using the paired sample t-Test in the analysis and comparing the LPS concentration of 1.5μg/mL with other concentrations, the difference was most significant for the 1.5μg/mL LPS. The interleukin-6 (IL-6) and tumour necrosis factor alpha (TNF-α) were used as indicators for the host’s responses to the inflammation. The suitable concentration of LPS-induced inflammation in the HSF1184 cell line was determined based on the response of the cytokine. The determination of the inflammation-inducing concentration of LPS was based on the production of TNF-α and IL-6 by the cells.
In Figure 3, the HSF1184 cell line was treated with different concentrations of LPS-induced inflammation for four hours and 24 hours. The supernatant of the HSF1184 cell line that was inflamed by the LPS was measured by the response of the cytokine (IL-6). By using the paired sample t-Test to compare the concentration of 1.5μg/mL LPS with other concentrations, the 1.5μg/mL LPS showed a more significant difference than the other concentrations (p<0>in-vitro simulated model. This LPS concentration was determined using quantitative experiments such as quantitative cell viability using an MTT assay and quantitative cytokines concentration. Thus, 1.5μg/mL of LPS was selected to induce inflammation in the HSF1184 cell line in the following experiments.
4.2 Cell Viability of LPS-Induced HSF1184 Treated with Niosome-Encapsulated Bromelain
In the MTT assay, inflammation was induced in the HSF1184by the 1.5 μg/mL LPS. It was treated with the niosome-encapsulated bromelain, non-encapsulated bromelain, and the vehicle (niosome). In this experiment, acetaminophen at a concentration of 2 μg/mL was considered as the positive control, LPS at a concentration of 1.5 μg/mL was the negative control, and DMEM-plus cells with a volume of 1 mL was the control specimen. The concentrations for the other treatments involving niosome-encapsulated bromelain, bromelain alone, and niosome (vehicle) were 20 μg/mL, 25 μg/mL, and 20 μg/mL, respectively, as determined from previous experiments.
Figure 4 and Figure 5 show the differences in the results for various treatments of niosome after four hours and 24 hours. Based on the presented figures, the biggest difference in the percentage of viability was related to the niosome-encapsulated 10% bromelain, which had a viability of about 96.70 percent in Figure 5 and a viability of 95 percent in Figure 4. On the contrary, the vehicle had the lowest viability at 24.90 percent in Figure 5 and 25.10 percent in Figure 4. However, the viability of bromelain alone was 78.90 percent in Figure 4 and 75.50 percent in Figure 5; this was the second highest after the niosome-encapsulated10% bromelain (Figure 4 and Figure 5). As a positive control, acetaminophen ranked third with 72 percent viability in Figure 4 and 60.70 percent in Figure 5. The free and encapsulated bromelain were evaluated by MTT assays using four different cell lines, which were HeLa, HEK293, MCF-7 and A549, for 24, 48 and 72 hours, respectively [48]. It was found that the encapsulated bromelain needed significantly (p<0>P<0>
4.3 IL-6 and TNFα Response in LPS Induction of HSF1184 Treated with Niosome-Encapsulated Bromelain
Interleukin-6 (IL-6) and tumour necrosis factor alpha (TNF-α), the two immune-modulatory regulators of cell responses to inflammation, were measured in response to 1.5 μg/mL LPS-induced inflammation and were then treated with niosome-encapsulated bromelain, non-encapsulated bromelain, and the vehicle. The cytokines, IL-6 and TNF-α, were used because these pro-inflammatory cytokines play a key role in the inflammatory response and can be easily quantified in the supernatant.
4.3.1 Determination of Inflammation Stage Using the IL-6 Response to Different Niosome Treatments:
Interleukin-6 (IL-6) was measured in response to 1.5 μg/mL LPS and was then treated with niosome-encapsulated bromelain at a concentration of 20μg/mL, bromelain alone with a concentration of 25 μg/mL, and niosome (vehicle) with a concentration of20 μg/mL. 1 mL DMEM was used as the blank sample and 1 mL of DMEM-plus cells was used as the control. All the concentrations resulted from previous experiments in this study.
Figure 6 and Figure 7 show that the lowest amounts of 2544 pg/mL in Figure 7 and 2561 pg/mL in Figure 6 belonged to the niosome-encapsulated bromelain. The highest amounts, marked at 3908 pg/mL in Figure 7 and 3868 pg/mL in Figure 6, were related to the vehicle. However, bromelain alone, reported at 3169 pg/mL in Figure 6 and 3489 pg/mL in Figure 7, was ranked second. Strong evidence on the anti-inflammatory effect of theniosome-encapsulated 10% bromelain was found when the result of the quantitative cytokines concentration showed the highest induction for LPS without any treatment and vehicle. The lowest induction of inflammatory cytokines was observed in the niosome-encapsulated bromelain and the bromelain-treated cells, as previously mentioned by Mosmann (1983) [51]. The statistical analysis of the niosome-encapsulated 10% bromelain showed a significant difference compared to other treatments of niosome, where P<0>
4.3.2 Determination of Inflammation Stage Using TNF-α Response to Different Niosome Treatments
The tumour necrosis factor alpha (TNF-α) was measured in response to 1.5 μg/mL LPS, and then to treatments with niosome-encapsulated bromelain at a concentration of 20 μg/mL, bromelain alone at a concentration of 25 μg/mL, and niosome (vehicle) at a concentration of 20 μg/mL. The setup for the control and blank samples was similar to that of the IL-6.
Figure 8 and Figure 9 show that the lowest amounts, marked at 1978 pg/mL in Figure 8 and 1991 pg/mL in Figure 9, were from the niosome-encapsulated bromelain. The highest amounts, reported at 3697 pg/mL in Figure 9 and 3688 pg/mL in Figure 8, were related to the vehicle. However, bromelain alone was ranked second since the reported readings were 2396 pg/mL in Figure 8 and 2410 pg/mL in Figure 9.
Unlike IL-6, strong evidence on the anti-inflammatory effect of niosome-encapsulated 10% bromelain was from the low induction of inflammatory cytokines with the niosome-encapsulated 10% bromelain and bromelain. The highest induction was observed in the LPS without any treatment and the vehicle-treated cells (Mosmann, 1983) [51]. Again, the niosome-encapsulated 10% bromelain was statistically significant. The efficacy of the bromelain-niosome system on skin inflammation around the knee was evaluated. The potential anti-inflammatory properties of the niosome-encapsulated bromelain were investigated in the HSF1184 cell line because this model produces high concentrations of IL-6 and TNF-α in cultures upon activation by LPS. Studies on the effects of bromelain on pro-inflammatory cytokines are limited. Moreover, no previous studies have evaluated the effects of niosome-encapsulated bromelain on IL-6 and TNF-α cytokines. Greenspan et al. (2005) [52] stimulated human endothelial cells with TNF-α and found that co-treatment with bromelain inhibited the production of TNF-α for LPS induction. However, in another study evaluating the inhibitory effects of bromelain on TNF-α production, Mastuda et al. (2012) [53] showed that bromelain inhibited the antigen IgE-mediated TNF-α secretion in RBL-2H3 mast cells. A potential reason for the differences in the results may be due to differences in the stimuli and cell types used. These findings are partly coherent with the results of this study, which show that niosome-encapsulated bromelain significantly impaired LPS-induced IL-6 and TNF-α production. Apart from this finding, in different comparisons of niosome encapsulation, the niosome-encapsulated bromelain could be affected in a higher range compared to other treatments like bromelain alone or a vehicle. Moreover, the results showed that niosome alone as a vehicle did not affect the IL-6 and TNF-α levels in the cultured supernatant and suggest that the immuno-stimulatory properties of the bromelain were not due to the presence of the vehicle [54]. On the other hand, during the post treatment, a pattern was observed where the anti-inflammatory cytokines peaked at four hours and 24 hours. A similar time period has been reported in numerous studies on humans [55]. Other key factors are the biological conditions of the HSF1184 cell line, for instance, inflammation induced by other components. Future perspectives should include an understanding on the molecular basis for the inhibitory effects of niosome-encapsulated bromelain on the HSF1184 cell line. The importance of niosome-encapsulated bromelain on the elimination of inflammation in the HSF1184 cell line infected by LPS-induced inflammation was evaluated. The result showed that niosome-encapsulated 10% bromelain significantly reduced the production of IL-6 and TNF-α in the LPS-induced human skin fibroblast cell line (HSF1184) after four hours post treatment as compared to the non-encapsulated bromelain and vehicle.
This study set out with the aim of assessing the importance of niosome-encapsulated bromelain in the elimination of inflammation in the HSF1184 cell line infected by LPS-induced inflammation. The results showed that niosome-encapsulated 10% bromelain significantly reduced the production of IL-6 and TNF-α in the LPS-induced human skin fibroblast cell line (HSF1184) after 4hours of post treatment as compared to the non-encapsulated bromelain and vehicle.
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I would like to express my gratitude towards you process of article review and submission. I found this to be very fair and expedient. Your follow up has been excellent. I have many publications in national and international journal and your process has been one of the best so far. Keep up the great work.
We are grateful for this opportunity to provide a glowing recommendation to the Journal of Psychiatry and Psychotherapy. We found that the editorial team were very supportive, helpful, kept us abreast of timelines and over all very professional in nature. The peer review process was rigorous, efficient and constructive that really enhanced our article submission. The experience with this journal remains one of our best ever and we look forward to providing future submissions in the near future.
I am very pleased to serve as EBM of the journal, I hope many years of my experience in stem cells can help the journal from one way or another. As we know, stem cells hold great potential for regenerative medicine, which are mostly used to promote the repair response of diseased, dysfunctional or injured tissue using stem cells or their derivatives. I think Stem Cell Research and Therapeutics International is a great platform to publish and share the understanding towards the biology and translational or clinical application of stem cells.
I would like to give my testimony in the support I have got by the peer review process and to support the editorial office where they were of asset to support young author like me to be encouraged to publish their work in your respected journal and globalize and share knowledge across the globe. I really give my great gratitude to your journal and the peer review including the editorial office.
I am delighted to publish our manuscript entitled "A Perspective on Cocaine Induced Stroke - Its Mechanisms and Management" in the Journal of Neuroscience and Neurological Surgery. The peer review process, support from the editorial office, and quality of the journal are excellent. The manuscripts published are of high quality and of excellent scientific value. I recommend this journal very much to colleagues.
Dr.Tania Muñoz, My experience as researcher and author of a review article in The Journal Clinical Cardiology and Interventions has been very enriching and stimulating. The editorial team is excellent, performs its work with absolute responsibility and delivery. They are proactive, dynamic and receptive to all proposals. Supporting at all times the vast universe of authors who choose them as an option for publication. The team of review specialists, members of the editorial board, are brilliant professionals, with remarkable performance in medical research and scientific methodology. Together they form a frontline team that consolidates the JCCI as a magnificent option for the publication and review of high-level medical articles and broad collective interest. I am honored to be able to share my review article and open to receive all your comments.
“The peer review process of JPMHC is quick and effective. Authors are benefited by good and professional reviewers with huge experience in the field of psychology and mental health. The support from the editorial office is very professional. People to contact to are friendly and happy to help and assist any query authors might have. Quality of the Journal is scientific and publishes ground-breaking research on mental health that is useful for other professionals in the field”.
Dear editorial department: On behalf of our team, I hereby certify the reliability and superiority of the International Journal of Clinical Case Reports and Reviews in the peer review process, editorial support, and journal quality. Firstly, the peer review process of the International Journal of Clinical Case Reports and Reviews is rigorous, fair, transparent, fast, and of high quality. The editorial department invites experts from relevant fields as anonymous reviewers to review all submitted manuscripts. These experts have rich academic backgrounds and experience, and can accurately evaluate the academic quality, originality, and suitability of manuscripts. The editorial department is committed to ensuring the rigor of the peer review process, while also making every effort to ensure a fast review cycle to meet the needs of authors and the academic community. Secondly, the editorial team of the International Journal of Clinical Case Reports and Reviews is composed of a group of senior scholars and professionals with rich experience and professional knowledge in related fields. The editorial department is committed to assisting authors in improving their manuscripts, ensuring their academic accuracy, clarity, and completeness. Editors actively collaborate with authors, providing useful suggestions and feedback to promote the improvement and development of the manuscript. We believe that the support of the editorial department is one of the key factors in ensuring the quality of the journal. Finally, the International Journal of Clinical Case Reports and Reviews is renowned for its high- quality articles and strict academic standards. The editorial department is committed to publishing innovative and academically valuable research results to promote the development and progress of related fields. The International Journal of Clinical Case Reports and Reviews is reasonably priced and ensures excellent service and quality ratio, allowing authors to obtain high-level academic publishing opportunities in an affordable manner. I hereby solemnly declare that the International Journal of Clinical Case Reports and Reviews has a high level of credibility and superiority in terms of peer review process, editorial support, reasonable fees, and journal quality. Sincerely, Rui Tao.
Clinical Cardiology and Cardiovascular Interventions I testity the covering of the peer review process, support from the editorial office, and quality of the journal.
Clinical Cardiology and Cardiovascular Interventions, we deeply appreciate the interest shown in our work and its publication. It has been a true pleasure to collaborate with you. The peer review process, as well as the support provided by the editorial office, have been exceptional, and the quality of the journal is very high, which was a determining factor in our decision to publish with you.
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 journal clinically in the future time.
Clinical Cardiology and Cardiovascular Interventions, I would like to express my sincerest gratitude for the trust placed in our team for the publication in your journal. It has been a true pleasure to collaborate with you on this project. I am pleased to inform you that both the peer review process and the attention from the editorial coordination have been excellent. Your team has worked with dedication and professionalism to ensure that your publication meets the highest standards of quality. We are confident that this collaboration will result in mutual success, and we are eager to see the fruits of this shared effort.
Dear Dr. Jessica Magne, Editorial Coordinator 0f Clinical Cardiology and Cardiovascular Interventions, I hope this message finds you well. I want to express my utmost gratitude for your excellent work and for the dedication and speed in the publication process of my article titled "Navigating Innovation: Qualitative Insights on Using Technology for Health Education in Acute Coronary Syndrome Patients." I am very satisfied with the peer review process, the support from the editorial office, and the quality of the journal. I hope we can maintain our scientific relationship in the long term.
Dear Monica Gissare, - Editorial Coordinator of Nutrition and Food Processing. ¨My testimony with you is truly professional, with a positive response regarding the follow-up of the article and its review, you took into account my qualities and the importance of the topic¨.
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
