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Seif SA, AlNatheer Y, Al Bahis L, Ramalingam S. Surgical Removal of an Orthodontic Mini-Screw Displaced Into the Lateral Pharyngeal Space: A Case Report and Review of Pertinent Literature. Cureus 2024; 16:e52343. [PMID: 38361701 PMCID: PMC10867549 DOI: 10.7759/cureus.52343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2024] [Indexed: 02/17/2024] Open
Abstract
Oral and maxillofacial surgeons are often faced with the clinical challenge of foreign body displacement into the perioral tissues and soft tissues of the head and neck. This mainly occurs either because of trauma or inadvertently during dental treatment. In addition to the maxillary sinus, iatrogenic foreign body displacement during dental treatment could happen into one of the 16 distinct fascial spaces of the head and neck region. Commonly displaced foreign bodies related to dental treatment include tooth roots or fragments, local anesthetic needles, implants and restorations. The clinical sequelae of a displaced foreign body depend on its size, shape, anatomic location and proximity to vital structures. Although patients may remain asymptomatic for a considerable amount of time, retained foreign bodies result in persistent pain, recurrent infection and scarring of soft tissue due to inflammation, all of which may complicate delayed retrieval. In addition to the history, imaging modalities such as plain radiographs and computed tomography (CT) help in locating the displaced foreign body and its subsequent retrieval. Surgical retrieval may be attempted through intraoral, transcervical and endoscopic approaches. Additionally, surgery may be aided by real-time imaging such as fluoroscopy. The present report aims to detail a case of inadvertent displacement of an orthodontic mini-screw, commonly used as a temporary anchorage device (TAD), into the lateral pharyngeal space, while attempting placement in the mandibular retromolar area. The case report also describes the surgical retrieval procedure of the TAD screw using an intraoral approach and with fluoroscopy guidance using C-Arm radiographic imaging. This case is reported along with the pertinent review of literature, as it not only explains a rare complication of orthodontic mini-screw placement but also details a modality to remove displaced foreign bodies from fascial spaces of the head and neck, which are otherwise directly inaccessible.
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Affiliation(s)
- Sameh A Seif
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Cairo University, Cairo, EGY
| | - Yaser AlNatheer
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Majmaah University, Majmaah, SAU
| | - Lama Al Bahis
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, SAU
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Moiduddin K, Mian SH, Elseufy SM, Alkhalefah H, Ramalingam S, Sayeed A. Polyether-Ether-Ketone (PEEK) and Its 3D-Printed Quantitate Assessment in Cranial Reconstruction. J Funct Biomater 2023; 14:429. [PMID: 37623673 PMCID: PMC10455463 DOI: 10.3390/jfb14080429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 07/31/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
Three-dimensional (3D) printing, medical imaging, and implant design have all advanced significantly in recent years, and these developments may change how modern craniomaxillofacial surgeons use patient data to create tailored treatments. Polyether-ether-ketone (PEEK) is often seen as an attractive option over metal biomaterials in medical uses, but a solid PEEK implant often leads to poor osseointegration and clinical failure. Therefore, the objective of this study is to demonstrate the quantitative assessment of a custom porous PEEK implant for cranial reconstruction and to evaluate its fitting accuracy. The research proposes an efficient process for designing, fabricating, simulating, and inspecting a customized porous PEEK implant. In this study, a CT scan is utilized in conjunction with a mirrored reconstruction technique to produce a skull implant. In order to foster cell proliferation, the implant is modified into a porous structure. The implant's strength and stability are examined using finite element analysis. Fused filament fabrication (FFF) is utilized to fabricate the porous PEEK implants, and 3D scanning is used to test its fitting accuracy. The results of the biomechanical analysis indicate that the highest stress observed was approximately 61.92 MPa, which is comparatively low when compared with the yield strength and tensile strength of the material. The implant fitting analysis demonstrates that the implant's variance from the normal skull is less than 0.4436 mm, which is rather low given the delicate anatomy of the area. The results of the study demonstrate the implant's endurance while also increasing the patient's cosmetic value.
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Affiliation(s)
- Khaja Moiduddin
- Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi Arabia
| | - Syed Hammad Mian
- Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi Arabia
| | | | - Hisham Alkhalefah
- Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi Arabia
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, College of Dentistry and Dental University Hospital, King Saud University Medical City, Riyadh 11545, Saudi Arabia
| | - Abdul Sayeed
- Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
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Ramalingam S, Alotaibi O, Alqudairy Z, Alnutaifi A, Alotaibi A. Effectiveness of Phone Call Follow-Ups in Improving Patient Compliance to Post-extraction Instructions: A Cross-Sectional Study. Cureus 2022; 14:e31499. [DOI: 10.7759/cureus.31499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2022] [Indexed: 11/15/2022] Open
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Andres M, Murphy TM, Poku N, Nazir S, Ramalingam S, Chambers V, Rosen SD, Lyon AR. Cardio-Oncology: a medical specialty in constant growth and evolution. the 10-year experience of the first cardio-oncology service in the United Kingdom. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Survivorship has increased significantly in cancer patients with the advent of novel therapies. However, this improvement has been at the cost of higher rates of cardiotoxicity. Cardiovascular disease has become the main cause of death or cancer therapy interruption in many of these patients. The need for specialist services to deal with these emerging problems has led to global development of many Cardio-Oncology services.
Objectives
To describe how a Cardio-Oncology service has grown and evolved over a 10 year period in response to the constantly changing oncological landscape.
Methods and results
Prospective, single center, study of cancer patients referred to our service from February 2011 to December 2021. 1499 patients were referred to the service. Mean age was 60 years (SD: 15) and 60% were female. CV risk factors including hypertension (32%), dyslipidaemia (12%) and diabetes (6%) were common.
The most frequent primary tumour location was breast (427 patients, 28%), followed by haematological (151, 10%) and gastrointestinal tract (114, 8%). The average number of referrals per month increased 6 fold from 2011, from 3.3 patients per month to 21 patients in 2021. In the last 5 years there was a 10 fold increase in the number of outpatient consultations from 189 consultations in 2016 to 1988 consultations in 2021.
The most frequent reason for referral was pre-treatment assessment (39%), followed by cancer therapy related cardiac dysfunction (CTRCD) (33%) and other acute cancer therapy related CV diseases (CTR-CVDs) (22%). From 2011 to 2017 CTRCD was the main CTR-CVD due to anthracycline and trastuzumab. This ratio changed in 2018 when other CTR-CVDs became the most frequent referral reason following pre-treatment assessment. Patients referred to our service were or had been, mostly under medical therapy alone or in combination with surgery or radiotherapy (1058 patients, 70%), anthracyclines being the predominant treatment (435 patients, 40%). Targeted therapies and immune check point inhibitors became more popular in the last two years (2020–2021). A multivariable logistic regression model was built to assess the relation between the medical treatment and the prevalence of CTRCD vs other CTR-CVDs. Anthracyclines and HER2 therapy are independently associated with a higher prevalence of CTRCD while tyrosine kinase inhibitors and immune checkpoint inhibitors increase the risk of other CTR-CVDs e.g. hypertension, arrhythmias and myocarditis.
Conclusions
Cardio-Oncology has rapidly evolved from its origin as a subspecialty of heart failure medicine, to a diverse medical specialty that encompasses many different domains of cardiology. Future cardio-oncology services should reflect this and be dynamic, collaborating with cardiac sub-specialities as necessary. Provision of cardio-oncology services requires a considerable knowledge and understanding of the ever growing and changing oncology therapies.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Andres
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - T M Murphy
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - N Poku
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - S Nazir
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - S Ramalingam
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - V Chambers
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - S D Rosen
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - A R Lyon
- Royal Brompton and Harefield Hospital , London , United Kingdom
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Garassino M, He Y, Ahn MJ, Orlov S, Potter V, Kato T, Laskin J, Voon P, Reungwetwattana T, Ramalingam S, Wu YL, Albayaty M, Cross S, Huang X, Kulkarni D, Cho B. EP08.02-108 Osimertinib Long-Term Tolerability in Patients with EGFRm NSCLC Enrolled in the AURA Program or FLAURA Study. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Passaro A, Leighl N, Blackhall F, Popat S, Kerr K, Ahn MJ, Arcila ME, Arrieta O, Planchard D, de Marinis F, Dingemans AM, Dziadziuszko R, Faivre-Finn C, Feldman J, Felip E, Curigliano G, Herbst R, Jänne PA, John T, Mitsudomi T, Mok T, Normanno N, Paz-Ares L, Ramalingam S, Sequist L, Vansteenkiste J, Wistuba II, Wolf J, Wu YL, Yang SR, Yang JCH, Yatabe Y, Pentheroudakis G, Peters S. ESMO expert consensus statements on the management of EGFR mutant non-small-cell lung cancer. Ann Oncol 2022; 33:466-487. [PMID: 35176458 DOI: 10.1016/j.annonc.2022.02.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/14/2022] [Accepted: 02/06/2022] [Indexed: 12/14/2022] Open
Abstract
The European Society for Medical Oncology (ESMO) held a virtual consensus-building process on epidermal growth factor receptor (EGFR)-mutant non-small-cell lung cancer in 2021. The consensus included a multidisciplinary panel of 34 leading experts in the management of lung cancer. The aim of the consensus was to develop recommendations on topics that are not covered in detail in the current ESMO Clinical Practice Guideline and where the available evidence is either limited or conflicting. The main topics identified for discussion were: (i) tissue and biomarkers analyses; (ii) early and locally advanced disease; (iii) metastatic disease and (iv) clinical trial design, patient's perspective and miscellaneous. The expert panel was divided into four working groups to address questions relating to one of the four topics outlined above. Relevant scientific literature was reviewed in advance. Recommendations were developed by the working groups and then presented to the entire panel for further discussion and amendment before voting. This manuscript presents the recommendations developed, including findings from the expert panel discussions, consensus recommendations and a summary of evidence supporting each recommendation.
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Affiliation(s)
- A Passaro
- Division of Thoracic Oncology, European Institute of Oncology IRCCS, Milan, Italy.
| | - N Leighl
- Division of Medical Oncology/Hematology, Princess Margaret Hospital Cancer Centre, Toronto, Canada
| | - F Blackhall
- Division of Cancer Sciences, The University of Manchester, Manchester, UK; Department of Medical Oncology, The Christie National Health Service (NHS) Foundation Trust, Manchester, UK
| | - S Popat
- National Heart and Lung Institute, Imperial College, London, UK; Lung Unit, Royal Marsden Hospital, London, UK; The Institute of Cancer Research, London, UK
| | - K Kerr
- Aberdeen Royal Infirmary, Aberdeen University Medical School, Aberdeen, UK
| | - M J Ahn
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - M E Arcila
- Department of Pathology, Molecular Diagnostics Service, Memorial Sloan Kettering Cancer Center, New York, USA
| | - O Arrieta
- Thoracic Oncology Unit, Instituto Nacional de Cancerología, Mexico City, Mexico
| | - D Planchard
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - F de Marinis
- Division of Thoracic Oncology, European Institute of Oncology IRCCS, Milan, Italy
| | - A M Dingemans
- Department of Respiratory Medicine, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - R Dziadziuszko
- Department of Oncology and Radiotherapy, Medical University of Gdańsk, Gdansk, Poland
| | - C Faivre-Finn
- The University of Manchester, Manchester Academic Health Science Centre, The Christie NHS Foundation Trust, Manchester, UK
| | - J Feldman
- Lung Cancer Patient and Advocate, Co-Founder of EGFR Resisters Patient Group
| | - E Felip
- Department of Medical Oncology, Vall d'Hebron University Hospital, Vall d'Hebron Institute of Oncology, Barcelona, Spain
| | - G Curigliano
- Department of Oncology and Hemato-Oncology, University of Milano, European Institute of Oncology IRCCS, Milan, Italy
| | - R Herbst
- Yale Comprehensive Cancer Center, Yale University School of Medicine, New Haven, USA
| | - P A Jänne
- Lowe Center for Thoracic Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - T John
- Peter MacCallum Cancer Centre, Melbourne, Australia
| | - T Mitsudomi
- Division of Thoracic Surgery, Department of Surgery, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
| | - T Mok
- State Key Laboratory of Translational Oncology, Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region, Hong Kong, China
| | - N Normanno
- Cell Biology and Biotherapy and Scientific Directorate, Istituto Nazionale Tumori, "Fondazione G.Pascale" IRCCS, Naples, Italy
| | - L Paz-Ares
- Lung Cancer Clinical Research Unit, and Complutense University, Madrid, Spain
| | - S Ramalingam
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Atlanta, Georgia
| | - L Sequist
- Department of Medicine, Massachusetts General Hospital, Boston, USA
| | - J Vansteenkiste
- Department of Respiratory Oncology, University Hospital KU Leuven, Leuven, Belgium
| | - I I Wistuba
- Department of Translational Molecular Pathology, Unit 951, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - J Wolf
- Lung Cancer Group Cologne, Department I for Internal Medicine and Center for Integrated Oncology Cologne/Bonn, University Hospital Cologne, Cologne, Germany
| | - Y L Wu
- Guangdong Lung Cancer Institute, Guangdong Provincial People's Hospital and Guangdong Academy of Medical Sciences, Guangdong, China
| | - S R Yang
- The Institute of Cancer Research, London, UK
| | - J C H Yang
- Department of Oncology, National Taiwan University Hospital and National Taiwan University Cancer Center, Taipei, Republic of China
| | - Y Yatabe
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - G Pentheroudakis
- Department of Medical Oncology, University of Ioannina, Ioannina, Epirus, Greece
| | - S Peters
- Oncology Department - CHUV, Lausanne University, Lausanne, Switzerland
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Peters S, Penrod J, Li J, Lubinga S, Gupta R, Bushong J, Rizzo J, Ramalingam S. 10P Treatment-free survival (TFS) in metastatic non-small cell lung cancer (mNSCLC) patients (pts) treated with 1L nivolumab plus ipilimumab (NIVO+IPI) or platinum doublet chemotherapy (PDC) in CheckMate (CM) 227. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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8
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Forde P, Kindler H, Zauderer M, Sun Z, Ramalingam S, Anagnostou V, Brahmer J, Nowak A, Kok P, Brown C, Yip S, Cook A, Lesterhuis W, Hughes B, Pavlakis N, Stockler M, O'Byrne K. DREAM3R: DuRvalumab With chEmotherapy as First Line treAtment in Advanced Pleural Mesothelioma: A Phase 3 Randomised Trial. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2021.10.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Thirumurugan R, Ramalingam S, Periandy S, Aarthi R, Karpagam J. Dual-Opto-electronic evaluation, and dielectric profile investigation of organic NLO crystal; 4-Dimethylamino-4′-Nitrobiphenyl using computational tool. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Stokes W, Behera M, Jiang R, Gutman D, Huang Z, Burns A, Sebastian N, Sukhatme V, Lowe M, Ramalingam S, Sukhatme V, Moghanaki D. Effect of Antibiotic Therapy on Immunotherapy Outcomes for Non-Small Cell Lung Cancer: Analysis From the Veterans Health Administration. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2021.10.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Syed Y, Stokes W, Rupji M, Liu Y, Khullar O, Sebastian N, Higgins K, Bradley J, Curran W, Ramalingam S, Taylor J, Sancheti M, Fernandez F, Moghanaki D. Surgical Outcomes for Early-Stage Non-Small Cell Lung Cancer at Facilities With Stereotactic Body Radiation Therapy Programs. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2021.10.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mansor A, Ramalingam S, Yusof N. Cadaveric Bone Donation amid COVID-19 Pandemic: An Unstoppable Chronicle in Uncharted Waters. Malays Orthop J 2021; 15:155-156. [PMID: 34966515 PMCID: PMC8667240 DOI: 10.5704/moj.2111.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 08/23/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- A Mansor
- Department of Orthopaedic Surgery (NOCERAL), University of Malaya, Kuala Lumpur, Malaysia
| | - S Ramalingam
- Department of Orthopaedic Surgery (NOCERAL), University of Malaya, Kuala Lumpur, Malaysia
| | - N Yusof
- Department of Orthopaedic Surgery (NOCERAL), University of Malaya, Kuala Lumpur, Malaysia
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Ramalingam S, Alsaleh MS, Almhidy NM, Aljeadi AA, Almosa OM, Alshehri AM, Almayouf AA, Alosaimi AF, Aldosari AM, Albaker MM, Albaker AM, Alrefaie RM. Patient’s Knowledge and Attitude towards Post-extraction Instructions Following Permanent Teeth Extraction. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i60a34516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background: Post extraction complications may arise if the extraction done is traumatic or the tooth was placed at a difficult position; this could lead to post-extraction complications and knowledge about the prevention of the same is the need of the hour. Hence, the present study was conducted to explore the knowledge of the participants about the prevention of post-extraction complications.
Material and Methods: This was a questionnaire-based cross-sectional descriptive study.
A total of 135 patients (75 males and 61females) were included in the study by the convenient method of sampling that visited the dental clinics of the College of Dentistry, Validated questionnaire was asked about post-extraction preventive knowledge. The statistical analysis was performed by the Statistical Package for Social Science version 21 (SPSS Inc Chicago, IL, USA). The significant value was obtained by using the Chi-Square test and p < 0.05 was set to be significant.
Results: Females more than 50 years of age group had better post-extraction preventive knowledge and there was significant relation (p < 0.05). Socioeconomic level and gender distribution had significant relation with the level of post-extraction preventive knowledge (p < 0.05). The patients who had better knowledge followed their instructions precisely.
Conclusion: It was concluded that female, patients above the middle age group and more qualified patients had more post-extraction preventive knowledge and they also followed the instructions very strictly. The importance of the study came out that dentists and the dental assistants should explain and convince patients to follow proper post-operative instructions to avoid post operative complications.
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Obeng R, Parihar V, Alexis D, Behera M, Owonikoko T, Pillai R, Ramalingam S, Sica G, Ahmed R. Mature tertiary lymphoid structures in lung adenocarcinoma are associated with better progression free survival. Am J Clin Pathol 2021. [DOI: 10.1093/ajcp/aqab191.317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction/Objective
The presence of inducible lymphoid structures known as tertiary lymphoid structures in the tumor microenvironment has been shown to correlate with positive clinical outcome. However, the maturation states of lymphoid aggregates in lung adenocarcinoma are not completely understood.
Methods/Case Report
Seventy tumor samples from 69 patients diagnosed with lung adenocarcinoma (Stages I to III) between 2013 and 2015 were included in the study. The presence and maturation states of the lymphoid structures within the tumors were evaluated by conventional and 26 samples were further analyzed by multiplexed immunohistochemistry of formalin fixed paraffin embedded tissues and then quantified. Mature lymphoid follicles containing germinal centers were identified by the presence of CD21+ and BCL-6+ cells in an organized configuration within tight clusters of T and B cells.
Results (if a Case Study enter NA)
Samples with fully mature lymphoid structures (germinal centers) had larger tumors and higher disease stage. The number of mature lymphoid structures correlated with the total number of lymphoid aggregates present in the tumor microenvironment. Additionally, tumor samples with ≥10 mature lymphoid structures had more primary follicles. While there was no difference in overall survival, progression free survival was significantly longer in patients who had ≥10 mature lymphoid structures in comparison with patients who had <10 mature structures.
Conclusion
In conclusion, a spectrum of lymphoid aggregates in different stages of maturation are present in lung adenocarcinoma. An increase in the number of mature lymphoid structures may be associated with progression free survival in patients with lung adenocarcinoma.
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Affiliation(s)
- R Obeng
- Pathology, Northwestern University, Chicago, Illinois, UNITED STATES
| | - V Parihar
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - D Alexis
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - M Behera
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - T Owonikoko
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - R Pillai
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - S Ramalingam
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - G Sica
- Winship Cancer Institute, Emory University, Atlanta, Georgia, UNITED STATES
| | - R Ahmed
- Emory Vaccine Center, Emory University, Atlanta, Georgia, UNITED STATES
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Isaac R, Paul B, Finkel M, Moorthy M, Venkateswaran S, Bachmann TT, Pinnock H, Norrie J, Ramalingam S, Minz S, Hansdak S, Blythe R, Keller M, Muliyil J, Weller D. The burden of COVID-19 infection in a rural Tamil Nadu community. BMC Infect Dis 2021; 21:1110. [PMID: 34711193 PMCID: PMC8552615 DOI: 10.1186/s12879-021-06787-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 10/05/2021] [Indexed: 11/10/2022] Open
Abstract
Background There have been over 30 million cases of COVID-19 in India and over 430,000 deaths. Transmission rates vary from region to region, and are influenced by many factors including population susceptibility, travel and uptake of preventive measures. To date there have been relatively few studies examining the impact of the pandemic in lower income, rural regions of India. We report on a study examining COVID-19 burden in a rural community in Tamil Nadu.
Methods The study was undertaken in a population of approximately 130,000 people, served by the Rural Unit of Health and Social Affairs (RUHSA), a community health center of CMC, Vellore. We established and evaluated a COVID-19 PCR-testing programme for symptomatic patients—testing was offered to 350 individuals, and household members of test-positive cases were offered antibody testing. We also undertook two COVID-19 seroprevalence surveys in the same community, amongst 701 randomly-selected individuals.
Results There were 182 positive tests in the symptomatic population (52.0%). Factors associated with test-positivity were older age, male gender, higher socioeconomic status (SES, as determined by occupation, education and housing), a history of diabetes, contact with a confirmed/suspected case and attending a gathering (such as a religious ceremony, festival or extended family gathering). Amongst test-positive cases, 3 (1.6%) died and 16 (8.8%) suffered a severe illness. Amongst 129 household contacts 40 (31.0%) tested positive. The two seroprevalence surveys showed positivity rates of 2.2% (July/Aug 2020) and 22.0% (Nov 2020). 40 tested positive (31.0%, 95% CI: 23.02 − 38.98). Our estimated infection-to-case ratio was 31.7. Conclusions A simple approach using community health workers and a community-based testing clinic can readily identify significant numbers of COVID-19 infections in Indian rural population. There appear, however, to be low rates of death and severe illness, although vulnerable groups may be under-represented in our sample. It’s vital these lower income, rural populations aren’t overlooked in ongoing pandemic monitoring and vaccine roll-out in India.
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Affiliation(s)
- R Isaac
- Christian Medical College, Vellore, Tamil Nadu, India
| | - B Paul
- Christian Medical College, Vellore, Tamil Nadu, India
| | - M Finkel
- Weill Cornell Medical College, New York, USA
| | - M Moorthy
- Christian Medical College, Vellore, Tamil Nadu, India
| | - S Venkateswaran
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK
| | - T T Bachmann
- Infection Medicine, Biomedical Sciences, University of Edinburgh, Edinburgh, UK
| | - H Pinnock
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK
| | - J Norrie
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK
| | - S Ramalingam
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK
| | - S Minz
- Christian Medical College, Vellore, Tamil Nadu, India
| | - S Hansdak
- Christian Medical College, Vellore, Tamil Nadu, India
| | - R Blythe
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK
| | - M Keller
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK
| | - J Muliyil
- Christian Medical College, Vellore, Tamil Nadu, India
| | - D Weller
- Centre for Population Health Sciences, Usher Institute, University of Edinburgh, Edinburgh, EH8 9AG, UK.
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Ramalingam S, Gunasekaran K, Arora H, Muruganandam M, Nagaraju S, Padmanabhan P. Disseminated BCG Infection after intravesical BCG Immunotherapy of Bladder Cancer. QJM 2021; 114:410-411. [PMID: 33585923 DOI: 10.1093/qjmed/hcab033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - K Gunasekaran
- Department of Pulmonary and Critical Care, Pulmonary and Critical Care, Bridgeport Hospital, 267 Grant Street, Bridgeport, CT 06610-5000, USA
| | | | - M Muruganandam
- Department of Rheumatology, University of New Mexico, 2211 Lomas Blvd NE, Albuquerque, NM 87106, USA
| | | | - P Padmanabhan
- Department of Cardiology, Unity Point Cardiology, 1301 Pennsylvania Ave Ste 100, Des Moines, IA 50316, USA
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Niknafs N, Forde P, Lanis M, Belcaid Z, Smith K, Sun Z, Balan A, White J, Cherry C, Shivakumar A, Shao X, Kindler H, Purcell T, Santana-Davila R, Dudek A, Borghaei H, Illei P, Velculescu V, Karchin R, Brahmer J, Ramalingam S, Anagnostou V. OA12.01 Genomic and Immune Cell Landscape of Response to Chemo-Immunotherapy in Malignant Pleural Mesothelioma. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Muthusamy B, Yin J, Sun Z, Ramalingam S, Pennell N. MA01.06 Effects of the Immunotherapy Era on Maintenance Outcomes in Advanced Nonsquamous NSCLC: Subgroup Analysis of ECOG 5508. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Stokes W, Behera M, Jiang R, Gutman D, Huang Z, Giuste F, Burns A, Sebastian N, Ramalingam S, Sukhatme V, Lowe M, Ramalingam S, Sukhatme V, Moghanaki D. P53.08 Concomitant Fibrates and Immunotherapy in Non-Small Cell Lung Cancer Patients in the Veterans Health Administration. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ahn M, Hartmaier R, Wu Y, Han J, Akamatsu H, John T, Yang J, Shepherd F, Delmonte A, Huang X, Mellemgaard A, Markovets A, Chmielecki J, Ramalingam S. FP16.03 Early Circulating-Tumor DNA EGFR Mutation Clearance in Plasma as a Predictor of Clinical Outcomes in The AURA3 Trial. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kehl K, Zahrieh D, Yang P, Hillman S, Tan A, Sands J, Oxnard G, Gillespie E, Wigle D, Malik S, Stinchcombe T, Ramalingam S, Kelly K, Mandrekar S, Osarogiagbon R, Kozono D. MA15.05 Rates of Guideline-Concordant Surgery and Adjuvant Chemotherapy Among Patients in The U.S. ALCHEMIST Study (Alliance). J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Behera M, Jiang R, Huang Z, Bunn B, Wynes M, Switchenko J, Scagliotti G, Belani C, Ramalingam S. P50.05 Natural History and Real-World Treatment Outcomes for NSCLC Patients with EGFR Exon 20 Insertion Mutation: An IASLC- ASCO CancerLinQ Study. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Westergaard S, Rupji M, Franklin L, Behera M, Ramalingam S, Higgins K. OA03.03 Patient Factors Associated With Engagement of an Academic Institution Tobacco Cessation Referral Program. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tian S, Kazzi B, Mccook A, Switchenko J, Stokes W, Shelton J, Kahn S, Carlisle J, Steuer C, Owonikoko T, Ramalingam S, Bradley J, Higgins K. FP08.01 Lung Stereotactic Body Radiation Therapy for Treatment of Oligoprogressive and Oligorecurrent Metastatic Disease: A Multi-Center Analysis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Spira A, Ramalingam S, Neal J, Piotrowska Z, Mekhail T, Tsao A, Gentzler R, Riely G, Bazhenova L, Gadgeel S, Nguyen D, Johnson M, Vincent S, Jin S, Griffin C, Bunn V, Lin J, Churchill E, Mehta M, Janne P. OA15.01 Mobocertinib in EGFR Exon 20 Insertion–Positive Metastatic NSCLC Patients With Disease Control on Prior EGFR TKI Therapy. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Skoulidis F, Schuler M, Wolf J, Barlesi F, Price T, Dy G, Govindan R, Borghaei H, Falchook G, Li B, Ramalingam S, Sacher A, Spira A, Takahashi T, Anderson A, Ang A, Dai T, Flesher D, Cifuentes P, Velcheti V. MA14.03 Genomic Profiles and Potential Determinants of Response and Resistance in KRAS p.G12C-mutated NSCLC Treated With Sotorasib. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Venkataramanan C, Ramalingam S, Manikandan A. LWBA: Lévy-walk bat algorithm based data prediction for precision agriculture in wireless sensor networks. IFS 2021. [DOI: 10.3233/jifs-202953] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Smart farming is one of the immense applications of Wireless Sensor Networks (WSN). Still, most of the researches have been focusing on precision agriculture using WSNs. In general, the nodes within the wireless sensor systems are self-configured. Based on the application requirement, gadgets within the region of interest collect data, prepare it, and send it to the recipient. The biggest impediments to these sensor systems are collision, restricted battery, and transmission capacity. Due to these characteristics, the node battery depletes earlier, when it starts working. Currently, agriculture depends on rain due to the lack of water resources and irrigation services. The crop development depends totally on the factors of water, the climatic conditions of the soil, etc. In large-scale agriculture, it is exceptionally problematic to analyze all the parameters accurately throughout the growing field. In this article, high-precision architecture for large-scale agriculture has been proposed. An IoT (Internet of Things) enabled WSN has been built and installed in the respective areas to measure the physical quantities regularly. In addition, Lévy-Walk Bat (LWBA) algorithm has been proposed to optimize the collected data. The prediction accuracy of the collected data is evaluated by LWBA and then, it is compared with the existing optimization algorithms with different error solvers. It has provided the exact information regarding the whole landscape and it will help the farmers to irrigate precisely.
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Affiliation(s)
- C. Venkataramanan
- Department of ECE, Vivekanandha College of Technology for Women, Tiruchengode, India
| | - S. Ramalingam
- Alagappa Chettiar Government College of Engineering and Technology, Karaikudi, India
| | - A. Manikandan
- Department of ECE, Vivekanandha College of Technology for Women, Tiruchengode, India
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Badwelan M, Alkindi M, Alghamdi O, Ahmed A, Ramalingam S, Alrahlah A. Bone Regeneration Using PEVAV/β-Tricalcium Phosphate Composite Scaffolds in Standardized Calvarial Defects: Micro-Computed Tomographic Experiment in Rats. Materials (Basel) 2021; 14:ma14092384. [PMID: 34063709 PMCID: PMC8124713 DOI: 10.3390/ma14092384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 04/25/2021] [Accepted: 04/28/2021] [Indexed: 01/18/2023]
Abstract
Bone regeneration using beta-tricalcium phosphate (β-TCP) can be practiced using a biocomposite scaffold. Poly(ethylene-co-vinylalcohol)/poly(δ-valerolactone)/β-tricalcium phosphate (PEVAV/β-TCP) composite scaffolds showed promising in vitro results. This study evaluated the bone regenerative potential of PEVAV/β-TCP biocomposite scaffolds in standardized calvarial defects in a rat model over 4 and 10 weeks. Bilateral calvarial defects (5 mm in diameter and about 1.5 mm thick, equivalent to the thickness of the calvaria) were created in 40 male Wistar albino rats. The defects were grafted with either commercially available β-TCP (positive control), PEVAV/β-TCP 70, or PEVAV/β-TCP 50, or left empty (negative control), depending on the group to which the animal was randomly assigned, to be covered before flap closure with resorbable collagen membrane (RCM). At 4 and 10 weeks post-surgery, the collected rat calvaria were evaluated using micro computed tomography (micro-CT) analysis, to assess the newly formed bone volume (NFBV), newly formed bone mineral density (NFBMD), and remaining graft volume (RGV). The results showed that calvarial defects grafted with the PEVAV/β-TCP biocomposite exhibited higher NFBV than did control defects, both at 4 and 10 weeks post-surgery. Furthermore, calvarial defects grafted with PEVAV/β-TCP 70 showed the highest NFBV among all grafting conditions, with a statistically significant difference recorded at 10 weeks post-surgery. The PEVAV/β-TCP composite scaffold showed potentiality for the regeneration of critical-sized calvarial bone defects in a rat model.
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Affiliation(s)
- Mohammed Badwelan
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (O.A.); (S.R.)
- Correspondence:
| | - Mohammed Alkindi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (O.A.); (S.R.)
| | - Osama Alghamdi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (O.A.); (S.R.)
| | - Abeer Ahmed
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia;
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (O.A.); (S.R.)
| | - Ali Alrahlah
- Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia;
- Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
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Sooryakala K, Ramalingam S, Periandy S, Aarthi R. NLO evaluation on opto-electronic application and chemical potential oscillation analysis of 2-Chloro-4-nitro-N-methylaniline crystal using crystallographic, spectroscopic and theoretical tools. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Alshihri S, Kindi M, Alfotawi R, Hindi MA, Alghamdi O, Ramalingam S, Assiri M. Assessment of Bone Regeneration Using Tooth Ash and Injectable Platelet Rich Fibrin: A Microcomputed Tomographic (CT) Analysis. J BIOMATER TISS ENG 2021. [DOI: 10.1166/jbt.2021.2659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Introduction: One of the main challenge of bone graft or socket preservation in particular is to get good quality and quantity of bone in short time prior to implant bed preparation. The buccal bone at the crest of the ridge is a very thin bone and usually resorb faster than
the rest of alveolar bone which may hinder an optimum dento-osseous implant insertion. The purpose of this study will be to assess the bone regeneration capabilities of Tooth Ash Particles (TAP) with injectable Plasma Rich Fibrin (i-PRF) and Tooth Ash Particles (TAP) alone at defects created
in the goat mandible bone using micro-computed tomographic (micro-CT). Materials and Methods: A total, 54 bone defect (5 mm × 8 mm) were performed in the 18 goats. The created defect received different treatment (Tx): Tx.A: Unfilled defect (allow natural bone regeneration; Tx.B:
Tooth Ash particle (TAP) alone; Tx.C: Tooth Ash + injectable PRF (TAP/i-PRF). Six goats, were sacrificed at different time points:Group 1: at 2nd week, Group2: at 5th week and Group3 at 8th week. The newly formed bone (NFB) was analyzed using micro-CT at different time points. Quantitative
and qualitative assessment were carried out namely; the volume of new bone formation (NF-BV) within the defect and its mineral density (NF-BMD), Trabecular Thickness (Tb Th), Trabecular Number (Tb N) and Trabecular Separation (Tb Sp). Result: By 8th week, the mean NF-BV was 69.482 ±
6.554 mm3 (cubic millimeter), 65.872±6.804 mm3, 26.820±14.643 mm3, while the mean NF-BMD was 0.417±0.119g/mm3, 0.786±0.036 g/mm3, 0.805±0.033 g/mm3 for the defects which received Tx.C, Tx.B
and Tx.A respectively. At 8th weekTb Th of NFB was 0.612±0.168, 0.913±0.112, and 0.701 ±0.126, Trabecular Number of NFB was 2.062±0.946, 1.002±0.155, and 1.816±2.042 and, Trabecular Separation of NFB was 0.330 ±0.131, 0.559 ±0.110, and
0.495 ±0.258 for the defects which received Tx.A, Tx.B and Tx.C respectively. Conclusion: Micro-CT study demonstrated that tooth ash particles mixed with injectable Platelet Rich Fibrin (i-PRF) on mandibular bone defect in goat’s model, resulting in new bone with significantly
higher volume, mineral density and less remodeling rate when compared with normal bone regeneration of unfilled defects.
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Affiliation(s)
- Saleh Alshihri
- Oral and Maxillofacial Resident, Faculty of Dentistry, King Saud University, Riyadh, 11545, KSA
| | - Mohammed Kindi
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, King Saud University, Riyadh, 11545, KSA
| | - Randa Alfotawi
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, King Saud University, Riyadh, 11545, KSA
| | - Marium Al Hindi
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, King Saud University, Riyadh, 11545, KSA
| | - Osama Alghamdi
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, King Saud University, Riyadh, 11545, KSA
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, King Saud University, Riyadh, 11545, KSA
| | - Mohammed Assiri
- Department of Oral and Maxillofacial Surgery, Dental Faculty, Najran University, Najran, 1988, KSA
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Abbas Manthiri A, Ramalingam S, George G, Aarthi R. Molecular structure analysis and biological properties investigation on antiseptic drug; 2-amino-1-phenyl-1-propanol using spectroscopic and computational research analysis. Heliyon 2021; 7:e06699. [PMID: 33898825 PMCID: PMC8056422 DOI: 10.1016/j.heliyon.2021.e06699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 10/17/2020] [Accepted: 04/01/2021] [Indexed: 11/28/2022] Open
Abstract
The inducement of physical, chemical, structural and biological properties to entice of pharmaceutical property was analyzed by Vibrational spectroscopic, biological and theoretical tools. The structural arrangement for describing structure activity was investigated by injecting ligand groups in internal coordinate system by molecular tools (FT adopted IR, Raman, and NMR). Bond length and bond angle strain was pronounced much due to the chemical equivalent forces extension due to the injection of substitutional groups on base compound and thus non-Centro symmetry was processed. The molecular charge depletion profile was thoroughly studied to persuade protonic and electronic delocalization setup for arranging the drug potential. The chemi-equivalent potential exchange was monitored among different parts of the molecule for obtaining drug mechanism. The biological profile was keenly observed to look at the biological ambiance of the present molecule to fabricate advanced drug. The Lipinski five rule parameters; MV = 137.18, LogP = 0.27, HBD = 2, HBA = 2 and TPSA = 46.2 A2 showed the enhancement of additive drug quality. The exchange of oscillating chemical energy in the core and allied carbons of the base skeleton was keenly noted to find the prearranged chemical environment for successful drug mechanism. The non bonded transitions between Lewis acid and base of bonded molecular system were observed to determine the restoring potential to customize drug potential. The drug assistance for enantiomer characteristics of chirality sequence was displayed to expose the toxicity effect of the molecule. The active molecular bondings on different sites of molecule were measured by estimating polarizability and associated biological inhibition was validated.
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Affiliation(s)
- A. Abbas Manthiri
- Department of Physics, Jamal Mohamed College, Tiruchirappalli, Tamilnadu, India
| | - S. Ramalingam
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
| | - Gene George
- Department of Physics, T.B.M.L. College, Porayar, Tamilnadu, India
| | - R. Aarthi
- Department of Physics, ST. Theresa's Arts and Science College, Tharangambadi, Tamilnadu, India
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Joice Malini M, Kunjitham R, Sangeetha M, Ramalingam S. Electro-optic property evaluation, vibrational analysis and optical investigation on NLO crystal; Nickel sulfate doped L-Valine crystal using theoretical tools. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2020.138268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ramalingam S, Baskaran K. An efficient data prediction model using hybrid Harris Hawk Optimization with random forest algorithm in wireless sensor network. IFS 2021. [DOI: 10.3233/jifs-201921] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Wireless Sensor Networks (WSNs) are consistently gathering environmental weather data from sensor nodes on a random basis. The wireless sensor node sends the data via the base station to the cloud server, which frequently consumes immoderate power consumption during transmission. In distribution mode, WSN typically produces imprecise measurable or missing data and redundant data that influence the whole network of WSN. To overcome this complexity, an effective data prediction model was developed for decentralized photovoltaic plants using hybrid Harris Hawk Optimization with Random Forest algorithm (HHO-RF) primarily based on the ensemble learning approach. This work is proposed to predict the precise data and minimization of error in WSN Node. An efficient model for data reduction is proposed based on the Principal Component Analysis (PCA) for processing data from the sensor network. The datasets were gathered from the Tamil Nadu photovoltaic power plant, India. A low cost portable wireless sensor node was developed for collecting PV plant weather data using Internet of Things (IoT). The experimental outcomes of the proposed hybrid HHO-RF approach were compared with the other four algorithms, namely: Linear Regression (LR), Support Vector Machine (SVM), Random Forest (RF) and Long Short Term Memory (LSTM) algorithm. Results show that the determination coefficient (R2), Mean Square Error (MSE), Root Mean Square Error (RMSE) and Mean Absolute Error (MAE) values of the HHO-RF model are 0.9987, 0.0693, 0.2336 and 0.15881, respectively. For the prediction of air temperature, the RMSE of the proposed model is 3.82 %, 3.84% and 6.92% model in the lowest, average and highest weather days. The experimental outcomes of the proposed hybrid HHO-RF model have better performance compared to the existing algorithms.
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Affiliation(s)
- S. Ramalingam
- Alagappa Chettiar Government College of Engineering and Technology, Karaikudi, India
| | - K. Baskaran
- Alagappa Chettiar Government College of Engineering and Technology, Karaikudi, India
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Ramalingam S, Arora S, Whipple Neibauer M, Zhou J, Hazard S, Frenkl T, Stojadinovic A, Peters S. P83.02 Niraparib + Pembrolizumab (Pembro) Versus Placebo + Pembro 1L Maintenance Therapy in Advanced NSCLC: ZEAL-1L Phase III Study. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Li B, Skoulidis F, Falchook G, Sacher A, Velcheti V, Dy G, Price T, Borghaei H, Schuler M, Kato T, Takahashi T, Spira A, Ramalingam S, Besse B, Barlesi F, Tran Q, Henary H, Ngarmchamnanrith G, Govindan R, Wolf J. PS01.07 Registrational Phase 2 Trial of Sotorasib in KRAS p.G12C Mutant NSCLC: First Disclosure of the Codebreak 100 Primary Analysis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.321] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Qian D, Behera M, Carlisle J, Owonikoko T, Steuer C, Pakkala S, Kesarwala A, Fischer-Valuck B, Bradley J, Curran W, Ramalingam S, Higgins K. P76.05 Radiotherapy with Concurrent Versus Sequential Osimertinib for Advanced Non-Small Cell Lung Cancer: a Multi-Center Toxicity Analysis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Khan S, Sun Z, Pillai R, Dahlberg S, Malhotra J, Keresztes R, Ikpeazu C, Ma P, Ramalingam S. MA01.09 Efficacy and Safety of Glembatumumab Vedotin in Patients With Advanced or Metastatic Squamous Cell Carcinoma of the Lung (PrECOG 0504). J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Spigel D, Rodríguez-Abreu D, Cappuzzo F, Velcheti V, Ganti A, Johnson D, Govindan R, Antonia S, Besse B, Altan M, Edelman M, Ramalingam S, Felip E, Gadgeel S, Juan-Vidal O, Gupta A, Currie S, Lin W, Tagliaferri M, Reck M. P77.04 PROPEL: A Phase 1/2 Trial of Bempegaldesleukin (NKTR-214) Plus Pembrolizumab in Lung Cancer and other Advanced Solid Tumors. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Alkindi M, Ramalingam S, Alghamdi O, Alomran OM, Binsalah MA, Badwelan M. Guided bone regeneration with osteoconductive grafts and PDGF: A tissue engineering option for segmental bone defect reconstruction. J Appl Biomater Funct Mater 2021; 19:2280800020987405. [PMID: 33541198 DOI: 10.1177/2280800020987405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Regeneration and reconstruction of segmental bone defects (SBD) is a clinical challenge in maxillofacial surgery and orthopedics. The present study evaluated efficacy of guided bone-regeneration (GBR) of rat femoral SBD using osteoconductive equine-bone (EB) and beta-tricalcium phosphate (beta-TCP) grafts, either with or without platelet-derived growth-factor (PDGF). Following ethical-approval, 50 male Wistar-Albino rats (aged ~12-15 months and weighing ~450-500 g) were included. A 5 mm femoral critical-size SBD was created and animals were divided into five groups depending on the graft material used for GBR (EB, EB + PDGF, Autograft, beta-TCP, beta-TCP + PDGF; n = 10/group). Following 12-weeks of healing, animals were sacrificed and femur specimens were analyzed through qualitative histology and quantitative histomorphometry. There was new bone bridging femoral SBD in all groups and qualitatively, better bone formation was seen in autograft and EB + PDGF groups. Histomorphometric bone-area (BA %) was significantly high in autograft group, followed by EB + PDGF, beta-TCP + PDGF, EB, and beta-TCP groups. Addition of PDGF to EB and beta-TCP during GBR resulted in significantly higher BA%. After 12-weeks of healing, EB + PDGF for GBR of rat femoral segmental defects resulted in new bone formation similar to that of autograft. Based on this study, GBR with EB and adjunct PDGF could be a potential clinical alternative for reconstruction and regeneration of segmental bone defects.
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Affiliation(s)
- Mohammed Alkindi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.,Dental University Hospital, King Saud University Medical City, Riyadh, Saudi Arabia
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.,Dental University Hospital, King Saud University Medical City, Riyadh, Saudi Arabia
| | - Osama Alghamdi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.,Dental University Hospital, King Saud University Medical City, Riyadh, Saudi Arabia
| | - Omar Mohamed Alomran
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed Awadh Binsalah
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed Badwelan
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Ramalingam S, Parthiban S. Functional motif prediction of non-structural proteins for serotype-specific differential diagnosis of dengue infection. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Sooryakala K, Ramalingam S, Maheswari R, Aarthi R. Synthesis opto-electronic characterization and NLO evaluation of 6-methyl 5-nitro Uracil crystal using XRD, spectroscopic and theoretical tools. Heliyon 2020; 6:e05329. [PMID: 33134592 PMCID: PMC7586122 DOI: 10.1016/j.heliyon.2020.e05329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/19/2020] [Accepted: 10/20/2020] [Indexed: 11/30/2022] Open
Abstract
The organic composite crystal for 6-methyl 5-nitro Uracil was grown using slow-evaporation method and the crystal quality was checked by observing the peaks in XRD pattern. The molecular structure of 6-methyl 5-nitro Uracil was used to find crystal parameters for determining NLO activity. The appropriate electronic geometrical structure was keenly noted and the transitional energy exchange was studied and thereby fine-tuning of crystal performance was made by adopting suitable electron-accepting and with-drawing substitutional groups. The crystal parameters; a≠b≠c confirmed the orthorhombic lattice pattern. The space group was found as P21/a and Transparency range was observed as 409-1256 nm. The laser measurements were made and laser Damage threshold was estimated at 10 ns[1.08-3 GW/cm2]. The scattering characteristics of bond networks over the molecule were observed by studying vibrational characteristics of elemental bonds. The hybrid calculations on DFT methods were made using B3LYP/6-311++(D,P) basis set. The chemical shift was observed and retracing chemical potential was identified from the parametric oscillation. The frontier molecular interactions between ground and excited orbital lobe overlapping segments were noted and type of interaction system was identified. The electronic and protonic transfer energy was measured and the origination point of equivalent chemical potential was acknowledged. The NBMO profile was keenly grafted and the transitional energy was measured at every consumed electronic energy band. The vibrational circular dichroic image for all vibrational regions was sketched and the rate of transmission and absorption ratio was verified from peak intensity.
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Affiliation(s)
- K. Sooryakala
- Department of Physics, S.T.E.T. Women's College1, Sundarakkottai, Mannargudi, Tamilnadu, India
- Department of Physics, A.V.C. College(Autonomous)1, Mayiladuthurai, Tamilnadu, India
| | - S. Ramalingam
- Department of Physics, A.V.C. College(Autonomous)1, Mayiladuthurai, Tamilnadu, India
| | - R. Maheswari
- Department of Physics, S.T.E.T. Women's College1, Sundarakkottai, Mannargudi, Tamilnadu, India
| | - R. Aarthi
- Department of Physics, ST. Theresa's Arts and Science College for Women1, Tharangambadi, Tamilnadu, India
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Jayachitra K, JobePrabakar P, Ramalingam S. Vibrational, NMR and UV–Visible spectroscopic investigation on 10-methyl anthracene 9-carbaldehyde using computational calculations. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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AlKindi M, Ramalingam S, Hakeem LA, AlSheddi MA. Giant Parotid Pleomorphic Adenoma with Atypical Histological Presentation and Long-Term Recurrence-Free Follow-Up after Surgery: A Case Report and Review of the Literature. Case Rep Dent 2020; 2020:8828775. [PMID: 32953184 PMCID: PMC7481918 DOI: 10.1155/2020/8828775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/14/2020] [Accepted: 08/21/2020] [Indexed: 11/17/2022] Open
Abstract
Salivary gland tumors (SGT) comprise 3% of all head and neck tumors, are mostly benign, and arise frequently in the parotid gland. Pleomorphic adenoma (PA) is the commonest SGT, representing 60-70% of all benign parotid tumors. Clinically, parotid PA presents as irregular, lobulated, asymptomatic, slow-growing preauricular mass, involving both superficial and deep lobes, and could grow to gigantic proportions. Histologically, PA has epithelial and mesenchymal elements in chondromyxoid matrix and is managed surgically. Based on a review of 43 cases reported in English literature since 1995, giant parotid PA is reported as large as 35 cm (diameter) and 7.3 kg (resected weight). Although rare, 10 cases of malignant transformation were reported in the review. Surgical management included extracapsular dissection (ECD), superficial parotidectomy, and total parotidectomy for benign tumors, and adjuvant radiation or chemotherapy for malignant tumors. We further present the case of a 36-year-old healthy male with slow-growing and asymptomatic giant parotid PA, of 4-year duration. The patient presented with firm, lobulated preauricular swelling, provisionally diagnosed as PA based on radiographic and cytological findings. The tumor was resected through ECD, and the patient had uneventful postoperative recovery and a 7-year recurrence-free follow-up period. Histological examination revealed epimyoepithelial proliferation punctuated by chondromyxoid areas, with extensive squamous metaplasia and keratin cysts. To the best of knowledge from indexed literature, giant parotid PA is rarely reported in Saudi Arabia. In addition to its rarity, this case is reported for its benign nature despite atypical histological presentation, successful surgical management without complications, and long-term recurrence-free follow-up. Based on this report, clinicians must be aware of atypical histological presentations associated with PA and plan suitable surgical management and follow-up to avoid morbidity. Nevertheless, attempts must be made to diagnose and manage these lesions at an early stage and before they reach gigantic proportions.
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Affiliation(s)
- Mohammed AlKindi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Lujain Abdulmajeed Hakeem
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Manal A. AlSheddi
- Department of Basic Sciences, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
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Bharadwaj R, Jagadeesan H, Kumar SR, Ramalingam S. Molecular mechanisms in grass-Epichloë interactions: towards endophyte driven farming to improve plant fitness and immunity. World J Microbiol Biotechnol 2020; 36:92. [PMID: 32562008 DOI: 10.1007/s11274-020-02868-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 06/10/2020] [Indexed: 11/26/2022]
Abstract
All plants harbor many microbial species including bacteria and fungi in their tissues. The interactions between the plant and these microbes could be symbiotic, mutualistic, parasitic or commensalistic. Mutualistic microorganisms are endophytic in nature and are known to play a role in plant growth, development and fitness. Endophytes display complex diversity depending upon the agro-climatic conditions and this diversity could be exploited for crop improvement and sustainable agriculture. Plant-endophyte partnerships are highly specific, several genetic and molecular cascades play a key role in colonization of endophytes in host plants leading to rapid changes in host and endophyte metabolism. This results in the accumulation of secondary metabolites, which play an important role in plant defense against biotic and abiotic stress conditions. Alkaloids are one of the important class of metabolites produced by Epichloë genus and other related classes of endophytes and confer protection against insect and mammalian herbivory. In this context, this review discusses the evolutionary aspects of the Epichloë genus along with key molecular mechanisms determining the lifestyle of Epichloë endophytes in host system. Novel hypothesis is proposed to outline the initial cellular signaling events during colonization of Epichloë in cool season grasses. Complex clustering of alkaloid biosynthetic genes and molecular mechanisms involved in the production of alkaloids have been elaborated in detail. The natural defense and advantages of the endophyte derived metabolites have also been extensively discussed. Finally, this review highlights the importance of endophyte-arbitrated plant immunity to develop novel approaches for eco-friendly agriculture.
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Affiliation(s)
- R Bharadwaj
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
| | - H Jagadeesan
- Department of Biotechnology, PSG College of Technology, Coimbatore, Tamil Nadu, India
| | - S R Kumar
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
| | - S Ramalingam
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India.
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Thangaraj M, Annamalai R, Moiduddin K, Alkindi M, Ramalingam S, Alghamdi O. Enhancing the Surface Quality of Micro Titanium Alloy Specimen in WEDM Process by Adopting TGRA-Based Optimization. Materials (Basel) 2020; 13:ma13061440. [PMID: 32245252 PMCID: PMC7143623 DOI: 10.3390/ma13061440] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/15/2020] [Accepted: 03/17/2020] [Indexed: 11/16/2022]
Abstract
The surface measures of machined titanium alloys as dental materials can be enhanced by adopting a decision-making algorithm in the machining process. The surface quality is normally characterized by more than one quality parameter. Hence, it is very important to establish multi-criteria decision making to compute the optimal process factors. In the present study, Taguchi–Grey analysis-based criteria decision making has been applied to the input process factors in the wire EDM (electric discharge machining) process. The recast layer thickness, wire wear ratio and micro hardness have been chosen to evaluate the quality measures. It was found that the wire electrode selection was the most influential factor on the quality measures in the WEDM process, due to its significance in creating spark energy. The optimal arrangement of the input process parameters has been found using the proposed approach as gap voltage (70 V), discharge current (15 A) and duty factor (0.6). It was proved that the proposed method can enhance the efficacy of the process. Utilizing the computed combination of optimal process parameters in surface quality analysis has significantly contributed to improving the quality of machining surface.
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Affiliation(s)
- Muthuramalingam Thangaraj
- Department of Mechatronics Engineering, SRM Institute of Science and Technology, Kattankulathur 603203, India;
| | - Ramamurthy Annamalai
- Department of Mechanical Engineering, Saveetha Engineering College, Thandalam, Chennai 602105, India;
| | - Khaja Moiduddin
- Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi Arabia
- Correspondence:
| | - Mohammed Alkindi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (S.R.); (O.A.)
| | - Sundar Ramalingam
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (S.R.); (O.A.)
| | - Osama Alghamdi
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia; (M.A.); (S.R.); (O.A.)
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Sathya A, Prabhu T, Ramalingam S. Structural, biological and pharmaceutical importance of antibiotic agent chloramphenicol. Heliyon 2020; 6:e03433. [PMID: 32154407 PMCID: PMC7057209 DOI: 10.1016/j.heliyon.2020.e03433] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/07/2020] [Accepted: 02/14/2020] [Indexed: 10/26/2022] Open
Abstract
The vibrational, magnetic resonance and electronic spectral techniques are used to evaluate structural activity associated physico-chemical properties. The biological affinity and drug importance was validated by calculating biological parameters using HyperChem. Mulliken charge assignment for restoring chemical potential for generating drug potential in the molecular site was mapped and analyzed. The vibrational spectral pattern was estimated by identifying active and inactive bands and hindrance of vibrational activity of Acetamide group was monitored and thereby drug malfunction was tested. The chemical reaction pathway around the core carbons of chain and ring was keenly noted and the cause of chemical potential for the inducement of drug mechanism was reported. The stimulation of chemical mechanism for antibiotic activity was addressed by suitable evidence and further improvement for enhancing activity was made. The electronic HOMO and LUMO interaction over different molecular entities are discussed to expose accompany of drug mechanical transitions. The CT complex was recognized to be C=N and C=C bonds and operating drug mechanism was monitored. The unwanted drug property induced by perplexes of charge depletion on α-hydroxyl group was assessed from MEP map. The hyperactive polarization energy of 266.18 X10-33 esu and 327 X10-33 esu of present compound is causing biological activity in good order. The uncontrolled breathing region of Acetamide group was clarified in VCD profile and this is main cause to produce toxicity in drug process.
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Affiliation(s)
- A. Sathya
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
- Affiliated to Bharathidasan University, Tiruchirappalli, Tamilnadu, India
| | - T. Prabhu
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
- Affiliated to Bharathidasan University, Tiruchirappalli, Tamilnadu, India
| | - S. Ramalingam
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
- Affiliated to Bharathidasan University, Tiruchirappalli, Tamilnadu, India
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Paz-Ares L, Ciuleanu T, Yu X, Salman P, Pluzanski A, Nagrial A, Havel L, Kowalyszyn R, Audigier-Valette C, Wu YL, Borghaei H, Hellmann M, Brahmer J, Reck M, Ramalingam S, Zhang L, Bhagavatheeswaran P, Nathan F, O'Byrne K. LBA3 Nivolumab (NIVO) + platinum-doublet chemotherapy (chemo) vs chemo as first-line (1L) treatment (tx) for advanced non-small cell lung cancer (aNSCLC): CheckMate 227 - part 2 final analysis. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz453.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Vidhya D, Ramalingam S, Periandy S, Aarthi R. Crystal property and spectroscopic investigation on electro-optic and physico-chemical properties of NLO crystal; 3-(3,4-Dihydroxyphenyl)-L-Alanine. Heliyon 2019; 5:e03055. [PMID: 32083203 PMCID: PMC7019075 DOI: 10.1016/j.heliyon.2019.e03055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/06/2019] [Accepted: 12/11/2019] [Indexed: 11/22/2022] Open
Abstract
In this attempt, in order to obtain high-quality NLO crystal, organic compound; 3-(3,4-Dihydroxyphenyl)-L-Alanine crystal was fabricated. The organic-composite crystal was characterized by crystallographic and spectroscopic tools. The NLO supported parameters like crystal lattice (orthorhombic) and space group (P212121) examined and validated by XRD examination. The SHG test was carried out and SHG efficiency was calculated that1.29 and 1.35 times greater than solid KDP crystal. The laser damage threshold energy density was determined to be 14.51 GW/cm2. By the application of mulliken charge assignment, multiple dielectric cavities were found in crystal material which is able to process the high degree of birefringence gradient. The oscillating chemical potential movement was observed by examining chemical shift, among the core carbons of hexagonal ring and bridge carbons of chain. The chemical softness insists the binding viability of further ligand groups. The π and δ-conjugated interactive complex orbitals recognized on molecular site and participation in optical active mechanism was identified. UV-Visible transmission characteristics of crystal were studied and UV-Visible absorption on degenerate energy states was noted and its band gap energy was estimated. The CT complex of the present case was acknowledged to be COOH group and it causing crystal properties of current organic composite. The hyperactive polarizability was determined as 1775.05 × 10-33 esu and it was found to be five times greater than thiourea. The depletion energy between highly electrophilic zones and protonic zones was estimated to be ±5.241 e 2 causing permanent dielectric characteristics for the title organic composite. The non-superposable on the molecular mirror image was displayed and thereby optical ability was validated.
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Affiliation(s)
- D. Vidhya
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
| | - S. Ramalingam
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
| | | | - R. Aarthi
- Department of Physics, ST. Theresa's College of Arts and Science, Tharangambadi, Tamilnadu, India
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Smeltzer M, Wynes M, Lantuejoul S, Soo R, Dalurzo L, Felip E, Hollenbeck G, Howell K, Kerr K, Kim E, Mathias C, Postmus P, Powell C, Ramalingam S, Richeimer K, Taylor M, Tsuboi M, Varella-Garcia M, Wistuba I, Wood K, Scagliotti G, Hirsch F. OA01.09 Comparing Regional Results from the IASLC Global Survey on Molecular Testing in Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.09.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hemachandran K, Anbusrinivasan P, Ramalingam S, Aarthi R, Nithya C. Structural activity analysis, spectroscopic investigation, biological and chemical properties interpretation on Beta Carboline using quantum computational methods. Heliyon 2019; 5:e02788. [PMID: 31844720 PMCID: PMC6895699 DOI: 10.1016/j.heliyon.2019.e02788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 09/07/2019] [Accepted: 11/01/2019] [Indexed: 12/31/2022] Open
Abstract
In this methodological work, the structural activity analysis have been carried out on β-Carboline to study the anti cancer activity and the way of improving the biological activity. The molecular spectroscopic tools were used to evaluate all the experimental data like spectral results and data were validated by the computational, HyperChem and Osiris tools. The structural, biological and physico-chemical related analyses have been performed to interpret the properties. The GPCR ligand calculated to be 0.11 for generating pharmacokinetic process, Specified drug information for the compound, was congregated from all types of structural activity which was drawn by spectral and HyperChem data. The σ and π interaction band gap (6.18 eV) ensured the drug consistency. The Mulliken charge process distribution was mapped, the charge orientation assignment was checked; the acquired negative charge potential consignment for the cause of antibiotic impact was verified. The molecular orbital interaction study was carried out to identify the origination of degeneracy of interaction causing drug mechanism. Using NMR spectral pattern, the chemical reaction path was recognized and the nodal region dislocation was distinguished on chemical shift. The Electronegativity (χ) and Electrophilicity charge transfer found to be 3.83 and 0.215, confirmed charge complex transfer for activating drug process in the compound. The molecular nonbonding section was thoroughly observed in order to find the occupancy energy, was the key process to initiate drug activity. The bathochromic electronic shift was observed and the existence of CT complex was discussed. The hindering of toxicity was inspected on inevitable chirality of the compound by specifying VCD spectrum.
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Affiliation(s)
- K. Hemachandran
- Department of Chemistry, A.V.C. College, Mayiladuthurai, Tamilnadu, India
| | - P. Anbusrinivasan
- Department of Chemistry, A.V.C. College, Mayiladuthurai, Tamilnadu, India
| | - S. Ramalingam
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
| | - R. Aarthi
- Department of Physics, ST. Theresas College of Arts and Science, Tharangambadi, Tamilnadu, India
| | - C.K. Nithya
- Department of Physics, ST. Theresas College of Arts and Science, Tharangambadi, Tamilnadu, India
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