Atomic force microscope observation of the surfaces of natural articular cartilage

Case Report | DOI: https://doi.org/10.31579/2690-1897/110

Atomic force microscope observation of the surfaces of natural articular cartilage

  • Kehinde Q. Yusuf 1,2
  • Raghuvir Pai3 3
  • Zenon Pawlak 4*

1 College of Medical Rehabilitation Sciences, Department of Prosthetics and Orthotics, Taibah University, PO Box 344, Madinah, Kingdom of Saudi Arabia
2 School of Chemistry, Physical and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia 
3 Department of Mechanical and Manufacturing Engineering, Manipal University, Manipal, 576 104, India
4 Tribochemistry Consulting, Salt Lake City, UT 84117, USA and University of Economy, Biotribology Laboratory, Garbary 2, 85-229 Bydgoszcz, Poland.

*Corresponding Author: Zenon Pawlak, Tribochemistry Consulting, Salt Lake City, UT 84117, USA and University of Economy, Biotribology Laboratory, Garbary 2, 85-229 Bydgoszcz, Poland.

Citation: Kehinde Q. Yusuf, Raghuvir Pai and Zenon Pawlak (2022).Atomic force microscope observation of the surfaces of natural articular cartilage J, Surgical Case Reports and Images 5(3); DOI:10.31579/2690-1897/110

Copyright: © 2021, Zenon Pawlak, 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: 09 April 2022 | Accepted: 25 April 2022 | Published: 28 May 2022

Keywords: atomic force; bovine cartilage; articular cartilage

Abstract

Hydrophilic and negatively charged natural cartilage surface is covered by phospholipids bilayers. These phospholipids have been demonstrated to exert highly desirable characteristics on the surface articular cartilage such as efficient lubrication, load processing, and semipermeability for nutrient transport. We examined a bovine cartilage (BC) surface using atomic force microscope. The study was performed using cartilage samples with healthy surfaces and completely depleted surface phospholipids. The artificially degraded cartilage surfaces (lipid depleted) were resurfaced with different species and combinations of synthetic bilayer of phospholipids found in human joints. Our results demonstrated that it is possible to recreate a potentially viable layer of phospholipids on the surface of degenerated cartilage. However, further studies will be required to advance the resurfacing idea developed in this paper for the potential treatment of osteoarthritis and other related orthopedic joint conditions.

Introduction

The surface-active phospholipids (SAPL) coating on the articular surface possess highly desirable lubricating properties for efficient joint function. The basic hypothesis of this research is that the surface-based degradation of articular cartilage can be corrected, or “resurfaced”. The resurfacing process involved the deposition of single lipid components (palmitoyl-oleoyl-phosphatidylcholine, POPC and dipalmitoyl-phosphatidylcholine, DPPC) and complete joint SAPL mixture on the surfaces of lipid-depleted cartilage. The analyses of the composition of the SAPLs in the human knee joints reveal that they mostly contain unsaturated phospholipids; 30% palmitoyl-linoleoylphosphatidylcholine (PLPC), 23% dilinoleoyl-phosphatidylcholine (DLPC), 17.5% palmitoyl-oleoyl-phosphatidylcholine (POPC) and 16% stearoyl-linoleoylphosphatidylcholine (SLPC), 8% saturated dipalmitoyl-phosphatidylcholine (DPPC) [1]. The uppermost lipid bilayer (i.e. surface amorphous layer (SAL)) of articular cartilage surface is degraded during osteoarthritic disease [2-3].  The surface amorphous layer is of utmost importance to the effective load-spreading, lubrication, and semipermeability of articular cartilage in the mammalian joints [4-7]. The outcome will potentially contribute to knowledge that will facilitate the repair of the articular surface of cartilage where degradation is limited to the loss of the lipids of the SAL only. 

The surface amorphous layer (SAL) is the topmost layer of articular cartilage often in contact during physiological function, thereby making it prone to wear and tear. The site of repeated contact can lead to early stages of joint degeneration like osteoarthritis and discomfort leading to low quality of life in affected patients. In order to simulate the loss of cartilage surface lipids, an artificial lipid extraction process was used (delipidization). It is hypothesized that restoration of the surface amorphous layer can be achieved by re-introducing synthetic surface-active phospholipids (SAPL) into the joint space. This hypothesis of restoration of the surface amorphous layer was tested in this work by re-introducing synthetic saturated and unsaturated phospholipids into the joint space. By exposing cartilage samples whose surface lipids had been depleted to individual and mixtures of synthetic saturated and unsaturated phospholipid solutions.  In this paper, laboratory procedure was developed for re-introducing lipids onto the surface of lipid-depleted articular cartilage. The process was termed lipid “resurfacing”. 

Material and Methods

The articular cartilage samples used in this study were obtained from the patellae of 3-4 year old bovine animals harvested from the local abattoir and stored at -20oC until required for testing. The samples were thawed out in continuous running water at room temperature and kept in saline solution (0.15M sodium chloride) prior to testing. A stainless-steel punch was used to cut osteochondral plugs (n = 20), containing full thickness articular cartilage-bone laminate and trimmed into specimen of 5 mm by 5 mmThe bony layer underlying the cartilage was dabbed with a paper towel and immediately glued onto a Petri dish using fast-drying Loctite® 454 glue (Henkel Australia PTY Ltd, Victoria, Australia). The Petri dish was mounted onto the AFM sample holder, ready for AFM measurements. During gluing, the articular surface was moistened repeatedly with drops of saline solution to keep surface intact. The glued sample was submerged in saline solution ready for AFM imaging using the SMENA® head of the NT-MDT P47 Solver scanning probe microscope (SPM) (NT-MDT, Moscow, Russia). The surface imaging was done using methods described elsewhere in the literature [8]. 

After imaging, lipids were selectively removed from the articular surface in accordance with the delipidization procedure described elsewhere in the literature [9] using Folch reagent (i.e. a mixture of chloroform/methanol, in the ratio 2:1 v/v). The delipidized samples were placed in saline solution for 30 min for rehydration and to remove the lipid rinsing agent and any organic solvent left on the surface of the tissue. Each sample was then mounted on the AFM for imaging. The delipidized specimens were divided into three groups (A, B and C), ready for relipidization with each group comprising of 5 samples. 

Relipidization is the process of resurfacing delipidized cartilage with synthetic phospholipids. Group A samples were incubated in DPPC solution (a saturated phospholipid), group B in POPC solution (an unsaturated phospholipid), and group C in complete joint SAPL mixture (containing both saturated and unsaturated lipids). The protocol for the relipidization process is described in our previous work [9]. After relipidization, the incubated samples were removed from the test tube container, rinsed saline solution and then mounted on the AFM for imaging using the scanning parameters as previously described for normal and delipidized cartilage samples.

Results and Discussion

The surfaces of normal, delipidized, and relipidized samples of cartilage were characterized for their structural integrity and functionality using atomic force microscope (AFM).  The results from AFM imaging revealed a successful deposition of a new surface layer on the lipid depleted cartilage when incubated in synthetic phospholipid solutions. The relipidization resulted in a noticeable improvement in the surface nanostructure of the artificially degraded cartilage, with the complete SAPL mixture providing better outcomes in comparison to those created with the single synthetic phospholipid components (palmitoyl-oleoyl-phosphatidylcholine, POPC and dipalmitoyl-phosphatidylcholine, DPPC). 

Phospholipids as boundary lubricants are highly self-organized biomolecules in aqueous media, and their structure allows them to form spontaneously vesicles, lamellar phases, and surface membranes. The multilamellar structure of phospholipids, namely the surface amorphous layer (SAL), covers the natural surface of articular cartilage found in diarthrodial joints. A very high porosity (75 to 80 %) is concluded to be a critical factor in providing excellent lubrication, more specifically hydration lubrication properties displayed by articular cartilage [10]. This is made possible by the amphoteric characteristics presented by the articular surface under physiological joint conditions [11]. Thus, making the articular surface highly efficient and extremely frictionless.

Figure 1. The hydrophobic (a) and hydrophilic cartilage surface (b) model with negatively charged phosphate ions on its surface.

The lipid bilayers on the surface of the healthy joint cartilage comprises mostly unsaturated phospholipid species with phosphatidyl-choline, PC (41%), phosphatidylethanolamine, PE (27%), and sphingomyelin, SP (32%) being the major components [12]. Liposomes and lamellar phases are composite structures made of phospholipids in synovial fluid and bilayers on cartilage surface (Figure 1). The strong adsorption of PLs molecules by their quaternary ammonium positive ion (Me3N+-) to hydrophilic cartilage surface (a proteoglycan) is [12] hydrophilic model of the cartilage surface. The strong cohesion between phosphate ions and calcium (II) (-PO4--Ca-PO4--), make the close-packed hydrophobic solid layer (Figure 1a). 

However, considering pH 7.4 condition and properties of phospholipids (PLs) of being highly self-organized bilayer structure, and the surface is negatively charged (Figure 1b). The multilamellar structure of phospholipids, namely the surface amorphous layer (SAL), covers the surface of diarthrodial joints bearing the articular cartilage. It can be concluded that a very high porosity (75%) is a critical factor in providing an excellent hydration lubrication of the articular cartilage. The phospholipid molecules in the SAPL exhibit a unique amphiphilic behavior possessing positive quaternary ammonium ions and negative phosphate ions. The quaternary ammonium (QA) ions has strong electrostatic bond strength and thus able to bind to surfaces with excess negative charges [4-13]. Since the proteoglycan molecules in the articular surface have excess carboxyl and sulphate ions, the surface of cartilage is attractive to the QA ions, thereby leaving the excess phosphate ions accessible for the positive mobile ions (Na+, Ca2+, H+) present in the synovial fluid [4,13]. 

The surface ionic interactions keep the articular cartilage electrically neutral, and an excellent boundary lubricant. It is hypothesized in paper that this exceptional surface chemical property-nanostructure possessed by the articular surface due its surface amorphous phospholipid layer is disrupted or lost when the surface lipids are eroded following early stages of cartilage degeneration (onset of osteoarthritis). In order to selectively remove lipids from cartilage surface, an artificial lipid removal process was employed (delipidization) [14

Figure 2.  3D topographical image of articular cartilage: (a) normal healthy; (b) delipidized articular cartilage; (c) relipidized articular cartilage in palmitoyl-oleoyl-phosphatidylcholine, POPC; (d) relipidized articular cartilage in dipalmitoyl-phosphatidylcholine, DPPC; (e) relipidized articular cartilage in complete SAPL mixture. 

The topographical images of articular cartilage specimens with normal intact, delipidized and relipidized (in aqueous solutions of POPC, DPPC and complete joint SAPL mixture) surfaces were captured with the AFM (Figure 2a to 2e). A study of the 3D resolved AFM image of the unaltered cartilage surface (Figure 2a) showed a unique organization of the SAL in a lamella-like arrangement as previously described by Hills et al. (1990) [15]. The nanostructural arrangement of the surface amorphous layer with several peaks and troughs are clearly apparent. Wiping of the normal intact surface with lipid rinsing reagent resulted in a noticeable change in the surface topographical structure. Figure 2b however, shows the loss of the lipid membranous overlay (surface amorphous layer) of the articular surface. Thus, confirming that lipid extraction process is effective [14]. 

The exposure of the delipidized of the second group of samples in unsaturated POPC partially restored the lost surface phospholipid nanostructural surface patterns. Figure 2c shows a moderately restored lamella layer of phospholipids slightly similar to intact articular surface. The relipidization in saturated DPPC did not yield any noticeable improvement in the surface configuration relative to normal intact articular surface sample. Figure 2d shows almost featureless structure of the articular surface when compared with an intact cartilage surface. Interestingly, the incubation in synthetic aqueous solution containing the complete joint SAPL species provided a much better resurfacing outcome, with the newly deposited lipid layer exhibiting almost similar SAL configuration observed in normal intact articular surface. Figure 2e shows similar peaks and troughs seen on the surface of normal cartilage surface (Figure 2a). Although, there is a close similarity in the surface nanostructural configuration of cartilage samples resurfaced with synthetic phospholipids, with complete SAPL showing more promising signs than other unsaturated SAPL species (POPC), further studies are required to determine the functionality of the newly laid surface under physiological conditions.

The artificially degraded cartilage surface (lipid depleted) is only partially comparable with a natural joint under inflammation where participation of β2-Glycoprotein I, (β2-GPI) is most important.  Molecules of β2-Glycoprotein I, (β2-GPI) (MW of 50 kDa) circulate in the body and autoimmune disease transforms β2-GPI in an antibody [16-17]. The β2-GPI participates in antiphospholipid antibody syndrome (APS) through binding of β2-GPI to the anionic charged phospholipid (-PO4-) group. At a pH around 7, β2-GPI - amino acids (arginine, lysine and tryptophan) are positively charged (-NH3+): an acid-base interaction occurs between the protonated amino acid group (-NH3+) and the phosphate (–PO4-) membrane group: (β2-GPI-NH3+) + (PLs–PO4-) → (-NH3+ PO4-) interaction and electrostatic attractions is strong enough to destroy thePLs bilayer on the articular surface and deactivate all phospholipids in the synovial fluid (SF). Under the conditions of our experiment, the phospholipids in the solutions can be deactivated by β2-GPI as well [18-19]. It is important to consider the effect of β2-Glycoprotein I in future studies on articular cartilage degeneration. 

Conclusion

It has been demonstrated, using individual components and complete mixture of surface-active phospholipids found in the normal surface amorphous layer overlaying the articular cartilage, that it is possible to amend the structural configuration of a delipidized articular surface, recreating it to a form approaching the normal intact surface. This result adds further support to the hypothetical position that it is possible to artificially “resurface” a degenerating articular cartilage, especially in the early stage condition such as osteoarthritis, by introducing synthetic phospholipid mixtures into the joint space. It should be noted that this work is still in its early stages and still requires more detailed research, in which more case scenarios will be considered with various combinations and concentrations of unsaturated phospholipid constituents such as SLPC, PLPC, and DLPC, and other components of the joint fluid, such as lubricin and hyaluronic acid. In conclusion, this study has established that it is possible to deposit a potentially viable layer on the surface of cartilage following degradation through incubation in synthetic phospholipid solutions. However, further studies will be required to advance the ideas developed for treatment of osteoarthritis and other joint conditions.  The surface restoration in osteoarthritic conditions considering the effect of deactivation of phospholipids requires additional experiments.

Conflicts of Interest

The authors declare that they have no conflict of interest.

References

Clearly Auctoresonline and particularly Psychology and Mental Health Care Journal is dedicated to improving health care services for individuals and populations. The editorial boards' ability to efficiently recognize and share the global importance of health literacy with a variety of stakeholders. Auctoresonline publishing platform can be used to facilitate of optimal client-based services and should be added to health care professionals' repertoire of evidence-based health care resources.

img

Virginia E. Koenig

Journal of Clinical Cardiology and Cardiovascular Intervention The submission and review process was adequate. However I think that the publication total value should have been enlightened in early fases. Thank you for all.

img

Delcio G Silva Junior

Journal of Women Health Care and Issues By the present mail, I want to say thank to you and tour colleagues for facilitating my published article. Specially thank you for the peer review process, support from the editorial office. I appreciate positively the quality of your journal.

img

Ziemlé Clément Méda

Journal of Clinical Research and Reports I would be very delighted to submit my testimonial regarding the reviewer board and the editorial office. The reviewer board were accurate and helpful regarding any modifications for my manuscript. And the editorial office were very helpful and supportive in contacting and monitoring with any update and offering help. It was my pleasure to contribute with your promising Journal and I am looking forward for more collaboration.

img

Mina Sherif Soliman Georgy

We would like to thank the Journal of Thoracic Disease and Cardiothoracic Surgery because of the services they provided us for our articles. The peer-review process was done in a very excellent time manner, and the opinions of the reviewers helped us to improve our manuscript further. The editorial office had an outstanding correspondence with us and guided us in many ways. During a hard time of the pandemic that is affecting every one of us tremendously, the editorial office helped us make everything easier for publishing scientific work. Hope for a more scientific relationship with your Journal.

img

Layla Shojaie

The peer-review process which consisted high quality queries on the paper. I did answer six reviewers’ questions and comments before the paper was accepted. The support from the editorial office is excellent.

img

Sing-yung Wu

Journal of Neuroscience and Neurological Surgery. I had the experience of publishing a research article recently. The whole process was simple from submission to publication. The reviewers made specific and valuable recommendations and corrections that improved the quality of my publication. I strongly recommend this Journal.

img

Orlando Villarreal

Dr. Katarzyna Byczkowska My testimonial covering: "The peer review process is quick and effective. The support from the editorial office is very professional and friendly. Quality of the Clinical Cardiology and Cardiovascular Interventions is scientific and publishes ground-breaking research on cardiology that is useful for other professionals in the field.

img

Katarzyna Byczkowska

Thank you most sincerely, with regard to the support you have given in relation to the reviewing process and the processing of my article entitled "Large Cell Neuroendocrine Carcinoma of The Prostate Gland: A Review and Update" for publication in your esteemed Journal, Journal of Cancer Research and Cellular Therapeutics". The editorial team has been very supportive.

img

Anthony Kodzo-Grey Venyo

Testimony of Journal of Clinical Otorhinolaryngology: work with your Reviews has been a educational and constructive experience. The editorial office were very helpful and supportive. It was a pleasure to contribute to your Journal.

img

Pedro Marques Gomes

Dr. Bernard Terkimbi Utoo, I am happy to publish my scientific work in Journal of Women Health Care and Issues (JWHCI). The manuscript submission was seamless and peer review process was top notch. I was amazed that 4 reviewers worked on the manuscript which made it a highly technical, standard and excellent quality paper. I appreciate the format and consideration for the APC as well as the speed of publication. It is my pleasure to continue with this scientific relationship with the esteem JWHCI.

img

Bernard Terkimbi Utoo

This is an acknowledgment for peer reviewers, editorial board of Journal of Clinical Research and Reports. They show a lot of consideration for us as publishers for our research article “Evaluation of the different factors associated with side effects of COVID-19 vaccination on medical students, Mutah university, Al-Karak, Jordan”, in a very professional and easy way. This journal is one of outstanding medical journal.

img

Prof Sherif W Mansour

Dear Hao Jiang, to Journal of Nutrition and Food Processing We greatly appreciate the efficient, professional and rapid processing of our paper by your team. If there is anything else we should do, please do not hesitate to let us know. On behalf of my co-authors, we would like to express our great appreciation to editor and reviewers.

img

Hao Jiang

As an author who has recently published in the journal "Brain and Neurological Disorders". I am delighted to provide a testimonial on the peer review process, editorial office support, and the overall quality of the journal. The peer review process at Brain and Neurological Disorders is rigorous and meticulous, ensuring that only high-quality, evidence-based research is published. The reviewers are experts in their fields, and their comments and suggestions were constructive and helped improve the quality of my manuscript. The review process was timely and efficient, with clear communication from the editorial office at each stage. The support from the editorial office was exceptional throughout the entire process. The editorial staff was responsive, professional, and always willing to help. They provided valuable guidance on formatting, structure, and ethical considerations, making the submission process seamless. Moreover, they kept me informed about the status of my manuscript and provided timely updates, which made the process less stressful. The journal Brain and Neurological Disorders is of the highest quality, with a strong focus on publishing cutting-edge research in the field of neurology. The articles published in this journal are well-researched, rigorously peer-reviewed, and written by experts in the field. The journal maintains high standards, ensuring that readers are provided with the most up-to-date and reliable information on brain and neurological disorders. In conclusion, I had a wonderful experience publishing in Brain and Neurological Disorders. The peer review process was thorough, the editorial office provided exceptional support, and the journal's quality is second to none. I would highly recommend this journal to any researcher working in the field of neurology and brain disorders.

img

Dr Shiming Tang

Dear Agrippa Hilda, Journal of Neuroscience and Neurological Surgery, Editorial Coordinator, I trust this message finds you well. I want to extend my appreciation for considering my article for publication in your esteemed journal. I am pleased to provide a testimonial regarding the peer review process and the support received from your editorial office. The peer review process for my paper was carried out in a highly professional and thorough manner. The feedback and comments provided by the authors were constructive and very useful in improving the quality of the manuscript. This rigorous assessment process undoubtedly contributes to the high standards maintained by your journal.

img

Raed Mualem

International Journal of Clinical Case Reports and Reviews. I strongly recommend to consider submitting your work to this high-quality journal. The support and availability of the Editorial staff is outstanding and the review process was both efficient and rigorous.

img

Andreas Filippaios

Thank you very much for publishing my Research Article titled “Comparing Treatment Outcome Of Allergic Rhinitis Patients After Using Fluticasone Nasal Spray And Nasal Douching" in the Journal of Clinical Otorhinolaryngology. As Medical Professionals we are immensely benefited from study of various informative Articles and Papers published in this high quality Journal. I look forward to enriching my knowledge by regular study of the Journal and contribute my future work in the field of ENT through the Journal for use by the medical fraternity. The support from the Editorial office was excellent and very prompt. I also welcome the comments received from the readers of my Research Article.

img

Dr Suramya Dhamija

Dear Erica Kelsey, Editorial Coordinator of Cancer Research and Cellular Therapeutics Our team is very satisfied with the processing of our paper by your journal. That was fast, efficient, rigorous, but without unnecessary complications. We appreciated the very short time between the submission of the paper and its publication on line on your site.

img

Bruno Chauffert

I am very glad to say that the peer review process is very successful and fast and support from the Editorial Office. Therefore, I would like to continue our scientific relationship for a long time. And I especially thank you for your kindly attention towards my article. Have a good day!

img

Baheci Selen

"We recently published an article entitled “Influence of beta-Cyclodextrins upon the Degradation of Carbofuran Derivatives under Alkaline Conditions" in the Journal of “Pesticides and Biofertilizers” to show that the cyclodextrins protect the carbamates increasing their half-life time in the presence of basic conditions This will be very helpful to understand carbofuran behaviour in the analytical, agro-environmental and food areas. We greatly appreciated the interaction with the editor and the editorial team; we were particularly well accompanied during the course of the revision process, since all various steps towards publication were short and without delay".

img

Jesus Simal-Gandara

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.

img

Douglas Miyazaki

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.

img

Dr Griffith

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.

img

Dr Tong Ming Liu

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.

img

Husain Taha Radhi

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.

img

S Munshi

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.

img

Tania Munoz

“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”.

img

George Varvatsoulias

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.

img

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.

img

Khurram Arshad

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.

img

Gomez Barriga Maria Dolores

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.

img

Lin Shaw Chin

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.

img

Maria Dolores Gomez Barriga

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.

img

Dr Maria Dolores Gomez Barriga

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¨.

img

Dr Maria Regina Penchyna Nieto

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.

img

Dr Marcelo Flavio Gomes Jardim Filho

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!”

img

Zsuzsanna Bene

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

img

Dr Susan Weiner