1
|
Gajalakshmi G, Meenakshi S. Understanding the psycho-social problems of vulnerable adolescent girls and effect of intervention through life skill training. J Educ Health Promot 2024; 12:429. [PMID: 38464658 PMCID: PMC10920669 DOI: 10.4103/jehp.jehp_612_23] [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] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/16/2023] [Indexed: 03/12/2024]
Abstract
INTRODUCTION Children and adolescents are considered to be among the most vulnerable groups with respect to psychosocial issues who have been affected the most by this change in the family structure. The adolescent phase for girls is a critical period characterized by significant bio-psychosocial transformations. It is imperative to provide adolescents with the necessary tools and abilities to effectively confront these challenges which are provided by the members of the family. The implementation of life skill education is commonly acknowledged as an intervention mechanism for augmenting skills and abilities to manage the daily challenges of life, particularly among a distinct demographic such as adolescents. This study aims to examine the potential correlation between the growing incidence of mental health disorders among minors and the escalating levels of problematic smartphone and social media usage. It highlights the necessity of promoting health education in schools and investigating the impact of inadequate parenting on adolescent mental health. This paper is founded on a psychosocial intervention that employs life skill education to assist adolescents in managing the internal and external changes that arise during their developmental stage. METHODS This study employed qualitative research methods. The qualitative study findings were gathered from a variety of secondary sources, including media articles, academic journal articles, and past theses. A discourse analysis method was used throughout this study, and several case studies were gathered from news articles and journals to provide a brief overview of an Adolescent girl's current situation. RESULTS Adolescence pressure and the consequences of this is a global issue. Adolescent stage is the most vulnerable group in the society. This paper attempts to study the psychological problems of the adolescence as they grow up and helps in understanding their problems and implementing life skill training methods to help them rejuvenate from trauma. CONCLUSION In all, initiatives aimed at mitigating stressors in the lives of adolescents often commence with educating teenagers and adolescents about the potential hazards associated with these stressors. The implementation of certain strategies should be incorporated into guidelines aimed at promoting the safe and healthy use of social media by young individuals. Keeping track of their academic progress and dealing with any problems early on can help them avoid the negative effects of psychological problems in adolescence.
Collapse
Affiliation(s)
- G Gajalakshmi
- Department of English, School of Social Sciences and Languages, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - S Meenakshi
- Department of English, School of Social Sciences and Languages, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| |
Collapse
|
2
|
R SD, Girigoswami A, Meenakshi S, Deepika B, Harini K, Gowtham P, Pallavi P, Girigoswami K. Beneficial effects of bioinspired silver nanoparticles on zebrafish embryos including a gene expression study. ADMET DMPK 2024; 12:177-192. [PMID: 38560712 PMCID: PMC10974822 DOI: 10.5599/admet.2102] [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] [Received: 10/02/2023] [Revised: 12/28/2023] [Indexed: 04/04/2024] Open
Abstract
Background and purpose Many sectors use nanoparticles and dispose of them in the aquatic environment without deciding the fate of these particles. Experimental approach To identify a benign species of nanoparticles which can cause minimum harm to the aquatic environment, a comparative study was done with chemically synthesized silver nanoparticles (AgNPs) and green tea mediated synthesis (GT/AgNP) in both in vitro using human alveolar cancer cell line (A549) and normal cell line (L132), and in in vivo with zebrafish embryos. Key results The in vitro studies revealed that GT/AgNPs were less toxic to normal cells than cancer cells. The GT/AgNPs showed high biocompatibility for zebrafish embryos monitored microscopically for their developmental stages and by cumulative hatchability studies. The reduced hatchability found in the AgNPs-treated group was correlated by differential gene expression of zebrafish hatching enzymes (ZHE) (ZHE1 and ZHE2). Conclusion The results indicated that nanoparticles can affect the hatching of zebrafish embryos and elicit toxicity at the gene level.
Collapse
Affiliation(s)
- Sakthi Devi R
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Agnishwar Girigoswami
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Shanmugaraja Meenakshi
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Balasubramanian Deepika
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Karthick Harini
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Pemula Gowtham
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Pragya Pallavi
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| | - Koyeli Girigoswami
- Medical Bionanotechnology, Faculty of Allied Health Sciences, Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam, Chennai-603 103, India
| |
Collapse
|
3
|
Meenakshi S, Rajasekar MK, Ramanathan S. Retrospective Cohort Study on the Surgical Outcomes of Intracapsular Thyroidectomy Vs Standard Thyroidectomy. Indian J Otolaryngol Head Neck Surg 2023; 75:3792-3797. [PMID: 37974880 PMCID: PMC10645788 DOI: 10.1007/s12070-023-04074-9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 07/10/2023] [Indexed: 11/19/2023] Open
Abstract
The focal point of thyroidectomy surgery has always been to reduce the incidence of inadvertent damage to the recurrent laryngeal nerve(RLN). The intracapsular thyroidectomy is one such technique with minimum chance of injuring the nerve. To compare retrospectively the surgical outcomes between the two methods of thyroidectomy-coventional thyroidectomy Vs intracapsular thyroidectomy. Materials and methods-55 cases of benign thyroid disease for whom thyroidectomy was performed in our hospital between the period of 2019-2022 were compared retrospectively. Out of these 34 cases had undergone intracapsular thyroidectomy and 21 cases underwent routine extracapsular thyroidectomy. The surgical outcomes including operation time, pain, postoperative infection, postoperative hypocalcemia, postoperative recurrent laryngeal nerve paralysis and mean hospital stay were analyzed. The mean operating time were very low in the intracapsular limb as compared to the other group. The pain and the mean hospital stay was also far lesser for the intracapsular limb. Both cohorts had no incidence of hypocalcemia. The incidence of recurrent laryngeal nerve palsy was very low in the intracapsular cohort (only 1 case of temporary unilateral RLN palsy), whereas it was higher in the routine extracapsular cohort (5 cases of permanent palsy). The risk of having vocal cord palsy (left/right) is 1.172 times more with conventional/standard thyroidectomy as compared to intracapsular thyroidectomy. Intracapsular technique is a much more rewarding method to perform thyroidectomy, without the risk of the recurrent laryngeal nerve palsy as compared to routine thyroidectomy.
Collapse
|
4
|
Nikitha M, Elanchezhiyan SS, Meenakshi S. Photodegradation of rhodamine-B in aqueous environment using visible-active gC 3N 4@CS-MoS 2 nanocomposite. Environ Res 2023; 238:117032. [PMID: 37673121 DOI: 10.1016/j.envres.2023.117032] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/07/2023] [Accepted: 08/30/2023] [Indexed: 09/08/2023]
Abstract
Rapid industrial expansion leads to environmental pollution especially in an aqueous environment. Photocatalytic degradation is one of the most efficient and environmentally friendly techniques used to treat industrial pollution due to its complete degradation capability of a variety of water contaminants to their non-toxic state. Graphitic carbon nitride (gC3N4) and molybdenum disulfide (MoS2) provide efficient dye degradation, but MoS2 has few disadvantages. Hence, chitosan (CS) supported gC3N4-MoS2 hybrid nanocomposite was developed in this study to reduce these issues by accelerating the degradation of dye molecules such as rhodamine-B under visible light. The prepared gC3N4@CS-MoS2 hybrid nanocomposite was thoroughly characterized using various analytical tools including FTIR, XRD, SEM, EDX, XPS, UV-Visible, and PL spectra. Several influencing parameters such as irradiation time, initial pH, dosage, and initial dye concentration were optimized by batch mode. The photodegradation of rhodamine-B could be induced by the heterogeneous gC3N4@CS-MoS2-water hybrid nanocomposite. The narrow band gap of gC3N4@CS-MoS2 (1.80 eV) makes it suitable for effective degradation of rhodamine-B due to more active in the visible region and attained its highest degradation efficiency of 99% after 40 min at pH 8 with minimum dosage of 60 mg. The possible degradation mechanism was tentatively proposed for rhodamine-B dye molecules from aqueous environment. The present work shows a novel photocatalyst for the purification and detoxification of dye molecules as well as other water contaminants found in polluted wastewater.
Collapse
Affiliation(s)
- M Nikitha
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram, 624 302, Tamil Nadu, India.
| | - S Sd Elanchezhiyan
- Sethu Institute of Technology, Department of Chemistry, Kariapatti, Virthunagar District, Tamil Nadu, India.
| | - S Meenakshi
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram, 624 302, Tamil Nadu, India.
| |
Collapse
|
5
|
Radhika Krishnan C, Raghavendra Swamy KN, Sujatha P, Meenakshi S, Aradya A. Comparative evaluation of masticatory efficiency in various facial forms of dentate and rehabilitated complete denture patients. INT J PROSTHODONT 2023; 0:4500083. [PMID: 37824119 DOI: 10.11607/ijp.8433] [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: 10/13/2023]
Abstract
PURPOSE To evaluate the masticatory efficiency in various facial forms of dentate and rehabilitated complete denture patients. MATERIALS AND METHODS A total of 60 subjects were selected for the study based on the inclusion criteria. Out of which 30 subjects belong to the dentate group (D) and 30 subjects belong to the completely edentulous group rehabilitated with conventional complete denture (CECD). They were sub-grouped as brachyfacial, mesofacial, and dolichofacial facial form using facial index measurement and cephalometric analysis. After which they had undergone masticatory efficiency test using spectrophotometric analysis using diluted expectorate of chewed natural test food beetroot (10, 15 and 20 strokes). Mean of absorbance value obtained was considered as mean masticatory efficiency. From which average masticatory efficiency percentage was determined using masticatory efficiency percentage equation and considered as the masticatory efficiency of that particular subject. RESULTS Statistical analysis reveals that among dentate subject (D) group, brachyfacial subjects exhibited highest masticatory efficiency (70.9 ± 12.64 %) followed by mesofacial (60.6 ± 10.66 %) and dolichofacial (34.3 ± 10.81%) subjects. Similarly in completely edentulous subjects rehabilitated with conventional complete denture (CECD), brachyfacial (52.7 ± 8.11%) subgroups, mesofacial (42.3 ± 6.52%) and dolichofacial (29.3 ± 7.76 %). CONCLUSION Along with other determinant factors, facial form also plays an influential role on masticatory efficiency. Brachyfacial subjects exhibited highest masticatory efficiency followed by mesofacial and dolichofacial subjects among both the study groups.
Collapse
|
6
|
Sirajudheen P, Vigneshwaran S, Kasim VCR, Basheer MC, Meenakshi S. Mechanistic view of MoS 2 confined chitosan-polyaniline hybrid composite for the photo-oxidation of cationic dyes. Int J Biol Macromol 2023; 249:126008. [PMID: 37516229 DOI: 10.1016/j.ijbiomac.2023.126008] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 07/31/2023]
Abstract
In this article, we describe the formulation of polyaniline-chitosan/MoS2 (PANI-CS @MoS2) blended composite and evaluated its efficiency to degrade the dye molecules Rhodamine B (RhB) and Malachite Green (MG) under visible light. In the photocatalytic mechanism, the CS acts as an electron carrier and binding agent during the oxidation reaction to decrease the recombination of electrons and holes generated by the irradiation of light. FTIR, XPS, XRD, TG, Zeta Potential, UV, SEM, AFM and TEM were used to characterize the PANI-CS@MoS2 composite after it had been synthesized. For the degradation analysis, 30 mg/L concentrations of 50 mL MG and RhB dye solutions were used. The recommended dosage of the composite was 100 mg. For MG and RhB dyes, the colour removal rates were 96.2 % and 91.5 %, respectively, under exposure to visible light and at the pH ranges of 8-11. After being exposed to visible light for 60 min, the whole decay process was accomplished. The photocatalyst offers great extensibility up to five iterations. The Langmuir-Hinshelwood kinetic model governs the rate of dye molecules degradation. The result of the study revealed that the PANI-CS@MoS2 composite matrix perhaps be a trustworthy and practical substrate for the efficient refinement of dye-deteriorated water.
Collapse
Affiliation(s)
- P Sirajudheen
- Department of Chemistry, Pocker Sahib Memorial Orphanage College, Tirurangadi, Malappuram, Kerala 676306, India.
| | - S Vigneshwaran
- Environmental System Laboratory, Department of Civil Engineering, Kyung Hee University Global Campus, 1732 Deogyong-daero, Giheung-Gu, Yongin-Si, Gyeonggi-Do 16705, Republic of Korea
| | - V C Resha Kasim
- Department of Chemistry, Pocker Sahib Memorial Orphanage College, Tirurangadi, Malappuram, Kerala 676306, India
| | - M C Basheer
- Department of Chemistry, Pocker Sahib Memorial Orphanage College, Tirurangadi, Malappuram, Kerala 676306, India
| | - S Meenakshi
- Department of Chemistry, The Gandhigram Rural Institute- Deemed to be University, Gandhigram, Dindigul, Tamil Nadu 624302, India.
| |
Collapse
|
7
|
Gowthami P, Kosiha A, Meenakshi S, Boopathy G, Ramu AG, Choi D. Biosynthesis of Co 3O 4 nanomedicine by using Mollugo oppositifolia L. aqueous leaf extract and its antimicrobial, mosquito larvicidal activities. Sci Rep 2023; 13:9002. [PMID: 37268654 DOI: 10.1038/s41598-023-35877-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/25/2023] [Indexed: 06/04/2023] Open
Abstract
Nanotechnology is a relatively revolutionary area that generates day-to-day advancement. It makes a significant impact on our daily life. For example, in parasitology, catalysis and cosmetics, nanoparticles possess distinctive possessions that make it possible for them in a broad range of areas. We utilized Mollugo oppositifolia L. aqueous leaf extract assisted chemical reduction method to synthesize Co3O4 nanoparticles. Biosynthesized Co3O4 Nps were confirmed via UV-Vis spectroscopy, scanning electron microscope, X-ray diffraction, EDX, Fourier-transform infrared, and HR-TEM analysis. The crystallite size from XRD studies revealed around 22.7 nm. The biosynthesized Co3O4 nanoparticle was further assessed for mosquito larvicidal activity against south-urban mosquito larvae Culex quinquefasciatus, and antimicrobial activities. The synthesized Co3O4 particle (2) displayed significant larvicidal activity towards mosquito larvae Culex quinquefasciatus with the LD50 value of 34.96 µg/mL than aqueous plant extract (1) and control Permethrin with the LD50 value of 82.41 and 72.44 µg/mL. When compared to the standard antibacterial treatment, Ciprofloxacin, the Co3O4 nanoparticle (2) produced demonstrates significantly enhanced antibacterial action against the pathogens E. coli and B. cereus. The MIC for Co3O4 nanoparticles 2 against C. albicans was under 1 μg/mL, which was much lower than the MIC for the control drug, clotrimale, which was 2 µg per milliliter. Co3O4 nanoparticles 2, with a MIC of 2 μg/mL, has much higher antifungal activity than clotrimale, whose MIC is 4 μg/mL, against M. audouinii.
Collapse
Affiliation(s)
- P Gowthami
- PG Department of Chemistry, Shrimati Devkunvar Nanalal Bhatt Vaishnav College for Women, Chennai, India
- School of Basic Sciences, Vels Institute of Science, Technology & Advanced Studies (VISTAS), Pallavaram, Chennai, India
| | - A Kosiha
- School of Basic Sciences, Vels Institute of Science, Technology & Advanced Studies (VISTAS), Pallavaram, Chennai, India.
| | - S Meenakshi
- Department of Chemistry, SRM Institute of Science and Technology (SRMIST), Ramapuram Campus, Chennai, 600 089, India
| | - G Boopathy
- Peri College of Arts and Science, Mannivakkam, Chennai, 600048, India
| | - A G Ramu
- Department of Materials Science and Engineering, Hongik University, 2639, Sejong-ro, Jochiwon-eup, Sejong, 30016, Republic of Korea
| | - Dongjin Choi
- Department of Materials Science and Engineering, Hongik University, 2639, Sejong-ro, Jochiwon-eup, Sejong, 30016, Republic of Korea.
| |
Collapse
|
8
|
Abstract
A wound is an injury to the skin or damage to the body tissue. The healing process differs between various kinds of wounds. Treatment of hard-to-heal (chronic) wounds becomes challenging for healthcare practitioners, especially if patients have underlying health complications such as diabetes. Infection of wounds is another factor that interferes with the healing process and extends its duration. Active research is being conducted into the development of advanced wound dressing technologies. These wound dressings are intended to manage the exudate, reduce bacterial infection and speed up the healing process. Probiotics have been receiving much attention because of their potential application in the clinical field, especially in diagnostics and treatment strategies of various infectious and non-infectious diseases. The host immune-modulatory response and antimicrobial activity of probiotics are expanding their role in the development of improved wound dressing technology.
Collapse
Affiliation(s)
- Shanmugaraja Meenakshi
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam-603103, Chennai, Tamil Nadu, India
| | - Ramadevi Santhanakumar
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam-603103, Chennai, Tamil Nadu, India
| |
Collapse
|
9
|
Rajeshwari S, Meenakshi S. The age of doom scrolling - Social media's attractive addiction. J Educ Health Promot 2023; 12:21. [PMID: 37034854 PMCID: PMC10079169 DOI: 10.4103/jehp.jehp_838_22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/16/2022] [Indexed: 06/19/2023]
Abstract
BACKGROUND Human survival requires the ability to communicate. Today's students' use of social media has opened up a slew of new possibilities; nevertheless, it is hard to say how many more may emerge in the future. As the years have gone by, the use of social networking sites has grown in popularity among teenagers. This research investigates both the ways in which social media draws in users and the ways in which it hooks users by revealing the gimmicky worlds that they inhabit. Depending more on social media than on oneself causes a tremendous problem. It is quite challenging to separate human beings from their many electronic devices in today's world. The use of devices gradually began to take over the world. MATERIALS AND METHODS Qualitative research approaches were used in this research. The qualitative study's findings were gathered from a variety of secondary sources, including media articles, academic journal articles, and past theses. Throughout the course of this study, a discourse analysis method was employed, and several case studies were gathered from news articles and journals. RESULTS According to the results of the research, addiction to the Internet has been defined as a decrease in an individual's ability to exercise self-control within the context of the social-cognitive framework. The research is based on true events that occurred in and around India. This research article focuses on the various positive and negative effects that social media may have on education and students. It is critical to figure out how to tackle this issue. CONCLUSION One effective strategy is to restrict their access to social media. The bulk of the disadvantages may be mitigated by reducing the amount of time spent on social media sites. Keeping track of their academic progress and dealing with any problems early on can help them avoid the negative effects of social media on their education.
Collapse
Affiliation(s)
- S Rajeshwari
- Department of English, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - S Meenakshi
- Department of English, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| |
Collapse
|
10
|
Sengupta S, Ganesh S, Meenakshi S, Bettahalli AS, Rao RM, Swamy KNR. Comparative evaluation of the antibacterial activity of red diode laser therapy and 0.2% chlorhexidine against Aggregatibacter actinomycetemcomitans on implant healing abutments: An ex vivo study. J Indian Prosthodont Soc 2023; 23:12-20. [PMID: 36588370 PMCID: PMC10088439 DOI: 10.4103/jips.jips_158_22] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/28/2022] [Accepted: 06/17/2022] [Indexed: 12/31/2022] Open
Abstract
Aims The intraoral microbiota has a high potential to undergo dysbiosis, causing inflammatory changes with respect to the tissues surrounding either a natural tooth or an implant. Thus, the longevity of implant prosthesis depends on a thorough implant decontamination protocol. Among all the techniques available for doing so, laser is garnering increasing popularity, owing to minimal bleeding, high efficiency, and faster healing. However, limited literature exists regarding the superiority of lasers over chlorhexidine (CHX), the indisputable gold standard antibacterial chemical agent. The aim of this study was to compare the percentage of bacterial reduction of Aggregatibacter actinomycetemcomitans from implant healing abutments post red diode laser therapy versus 0.2% CHX treatment. Settings and Design The current study had an ex vivo, observational, case-control design. Materials and Methods Patients reporting for the second stage of the implant surgery were taken as the source of data and the healing abutments, the clinical samples. Eleven patients were chosen with one intraoral implant serving as the test site for laser treatment and another, the control site for CHX treatment. Microbiological analysis was performed via quantitative real time polymerase chain reaction to compare the bacterial reduction percentage after each treatment. Statistical Analysis Used Repeated measures ANOVA and independent sample t test were used. Results The mean bacterial viability of the test group (laser) was 1.2%-1.6%, and 0.6%-1.4% for the control group (CHX). The former caused a mean bacterial reduction of 96.1% while the latter, 96.3%. Both the treatments caused a highly statistically significant reduction of viable bacterial counts (P = 0.001). However, when compared, there was no statistically significant difference in the bacterial reduction, when compared in between the two (P = 0.902). Conclusion Laser treatment is at par with chemical implant surface decontamination. It can help bypass the complications of CHX and revolutionize the protocols for implant surface decontamination.
Collapse
Affiliation(s)
- Soumee Sengupta
- Department of Prosthodontics and Crown and Bridge, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - S. Ganesh
- Department of Prosthodontics and Crown and Bridge, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - S. Meenakshi
- Department of Prosthodontics and Crown and Bridge, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - Avinash Singh Bettahalli
- Department of Periodontology, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - Raghavendra M. Rao
- Department of Microbiology, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - K. N. Raghavendra Swamy
- Department of Prosthodontics and Crown and Bridge, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| |
Collapse
|
11
|
Shelin R, Meenakshi S. Rise of Bacterial Small Proteins and Peptides in Therapeutic Applications. Protein Pept Lett 2023; 30:126-136. [PMID: 36654471 DOI: 10.2174/0929866530666230118144723] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 10/27/2022] [Accepted: 11/11/2022] [Indexed: 01/19/2023]
Abstract
BACKGROUND Polypeptides that comprise less than 100 amino acids (50 amino acids in some cases) are referred to as small proteins (SPs), however, as of date, there is no strict definition. In contrast to the small polypeptides that arise due to proteolytic activity or abrupt protein synthesis, SPs are coded by small open reading frames (sORFs) and are conventionally synthesized by ribosomes. PURPOSE OF THE REVIEW Although proteins that contain more than 100 amino acids have been studied exquisitely, studies on small proteins have been largely ignored, basically due to the unsuccessful detection of these SPs by traditional methodologies/techniques. Serendipitous observation of several small proteins and elucidation of their vital functions in cellular processes opened the floodgate of a new area of research on the new family of proteins called "Small proteins". Having known the significance of such SPs, several advanced techniques are being developed to precisely identify and characterize them. CONCLUSION Bacterial small proteins (BSPs) are being intensely investigated in recent days and that has brought the versatile role of BSPs into the limelight. In particular, identification of the fact that BSPs exhibit antimicrobial activity has further expanded its scope in the area of therapeutics. Since the microbiome plays an inevitable role in determining the outcome of personalized medicine, studies on the secretory small proteins of the microbiome are gaining momentum. This review discusses the importance of bacterial small proteins and peptides in terms of their therapeutic applications.
Collapse
Affiliation(s)
- Ruby Shelin
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Chennai, Tamil Nadu, India
| | - Shanmugaraja Meenakshi
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Chennai, Tamil Nadu, India
| |
Collapse
|
12
|
Veerapandi G, Meenakshi S, Sekar C. Rapid detection of gingerol and thymol in medicinal foods based on Fe2O3 nanoparticles modified glassy carbon electrode. Food Measure 2022. [DOI: 10.1007/s11694-022-01793-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
13
|
Sudhan N, Anitta S, Meenakshi S, Sekar C. Brushite nanoparticles based electrochemical sensor for detection of uric acid, xanthine, hypoxanthine and caffeine. Anal Biochem 2022; 659:114947. [PMID: 36216144 DOI: 10.1016/j.ab.2022.114947] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/27/2022] [Accepted: 10/01/2022] [Indexed: 12/14/2022]
Abstract
The research in the field of biosensors has recently been focused on the design and development of functional electrode materials that can respond to changes in their biochemical environment. Here, we report the synthesis of dicalcium phosphate dihydrate (DCPD), also known as brushite (CaHPO4·2H2O) by soft chemical method and its application for electrochemical sensing of four different analytes. Phase purity, structure, chemical composition and surface morphology of the synthesized nanoparticles have been investigated using powder XRD, FTIR, SEM, XPS and HRTEM methods. Electrochemical sensor was prepared by modifying GCE with brushite and the modified electrodes were successfully used for either independent or simultaneous determination of uric acid, xanthine, hypoxanthine and caffeine in their mixture. The brushite/GCE exhibited four strong well-defined separate peaks corresponding to the oxidation of UA, XN, HXN and CF in phosphate buffer saline (PBS) at pH 7.4. The fabricated electrode showed low detection limits (S/N = 3) of 0.576, 1.0, 0.076 and 1.26 μM for UA, XN, HXN and CF respectively. Practical application of the fabricated electrode has been demonstrated by determining UA, XN, HXN and CF in human urine and coffee samples by direct method. The brushite offers scope for fabrication of sensor systems for implantable medical applications.
Collapse
Affiliation(s)
- N Sudhan
- Department of Bioelectronics and Biosensors, Alagappa University, Karaikudi, 630 004, Tamilnadu, India; Department of Chemistry, Thiagarajar College, Madurai, 625009, Tamilnadu, India
| | - S Anitta
- Department of Bioelectronics and Biosensors, Alagappa University, Karaikudi, 630 004, Tamilnadu, India
| | - S Meenakshi
- Department of Bioelectronics and Biosensors, Alagappa University, Karaikudi, 630 004, Tamilnadu, India
| | - C Sekar
- Department of Bioelectronics and Biosensors, Alagappa University, Karaikudi, 630 004, Tamilnadu, India.
| |
Collapse
|
14
|
Veerapandi G, Meenakshi S, Anitta S, Arul C, Ashokkumar P, Sekar C. Precise and quick detection of ascorbic acid and eugenol in fruits, pharmaceuticals and medicinal herbs using hydroxyapatite-titanium dioxide nanocomposite-based electrode. Food Chem 2022; 382:132251. [PMID: 35139464 DOI: 10.1016/j.foodchem.2022.132251] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 08/12/2021] [Revised: 01/17/2022] [Accepted: 01/23/2022] [Indexed: 11/19/2022]
Abstract
Ascorbic acid (AA) and eugenol (EUG) are well-known antioxidants found in several fruits, spices and herbs. In particular, the EUG, one of the major phytocompounds present in clove, acts as pro-oxidant or anti-oxidant depending on its concentration. Considering the medical importance of AA and EUG and its extensive usage in the form of food and medicine, we have developed a voltammetric sensor based on hydroxyapatite-TiO2 composite modified GCE for their selective and simultaneous determination over very wide linear range of 2.78-2490 µM for AA and 1.4-78 µM for EUG with the LODs of 63.3 nM and 94 nM respectively. Practical applicability of the prepared electrode has been demonstrated by detecting AA and EUG in lemon juice, vitamin tablet, clove oil and Kabasura Kudineer, an herbal decoction used as an immunity booster against number of diseases including Covid-19. The proposed HAP-TiO2/GCE shall be useful for food and pharmaceutical industries.
Collapse
Affiliation(s)
- G Veerapandi
- Dept. of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630 004, TN, India
| | - S Meenakshi
- Dept. of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630 004, TN, India
| | - S Anitta
- Dept. of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630 004, TN, India
| | - C Arul
- Dept. of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630 004, TN, India
| | - P Ashokkumar
- Dept. of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630 004, TN, India
| | - C Sekar
- Dept. of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630 004, TN, India.
| |
Collapse
|
15
|
Veeramuthu A, Meenakshi S, Mathivanan G, Kotecha K, Saini JR, Vijayakumar V, Subramaniyaswamy V. MRI Brain Tumor Image Classification Using a Combined Feature and Image-Based Classifier. Front Psychol 2022; 13:848784. [PMID: 35310201 PMCID: PMC8931531 DOI: 10.3389/fpsyg.2022.848784] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 01/05/2022] [Accepted: 01/19/2022] [Indexed: 11/17/2022] Open
Abstract
Brain tumor classification plays a niche role in medical prognosis and effective treatment process. We have proposed a combined feature and image-based classifier (CFIC) for brain tumor image classification in this study. Carious deep neural network and deep convolutional neural networks (DCNN)-based architectures are proposed for image classification, namely, actual image feature-based classifier (AIFC), segmented image feature-based classifier (SIFC), actual and segmented image feature-based classifier (ASIFC), actual image-based classifier (AIC), segmented image-based classifier (SIC), actual and segmented image-based classifier (ASIC), and finally, CFIC. The Kaggle Brain Tumor Detection 2020 dataset has been used to train and test the proposed classifiers. Among the various classifiers proposed, the CFIC performs better than all other proposed methods. The proposed CFIC method gives significantly better results in terms of sensitivity, specificity, and accuracy with 98.86, 97.14, and 98.97%, respectively, compared with the existing classification methods.
Collapse
Affiliation(s)
- A. Veeramuthu
- Department of Information Technology, School of Computing, Sathyabama Institute of Science and Technology, Chennai, India
| | - S. Meenakshi
- Department of Information Technology, Jeppiaar SRR Engineering College, Chennai, India
| | - G. Mathivanan
- Department of Information Technology, School of Computing, Sathyabama Institute of Science and Technology, Chennai, India
| | - Ketan Kotecha
- Symbiosis Centre for Applied Artificial Intelligence, Symbiosis International (Deemed University), Pune, India
- *Correspondence: Ketan Kotecha,
| | - Jatinderkumar R. Saini
- Symbiosis Institute of Computer Studies and Research, Symbiosis International (Deemed University), Pune, India
| | - V. Vijayakumar
- School of Computer Science and Engineering, University of New South Wales, Sydney, NSW, Australia
| | - V. Subramaniyaswamy
- School of Computing, Shanmugha Arts, Science, Technology & Research Academy Deemed University, Thanjavur, India
| |
Collapse
|
16
|
Meenakshi S, Aradya A, Sreeshyla HS, Ranganatha N, Thammaiah S. Knowledge, attitude and preparedness to combat COVID-19 infection among dental professionals: A student-centric pilot study. J Oral Maxillofac Pathol 2022; 26:179-184. [PMID: 35968176 PMCID: PMC9364643 DOI: 10.4103/jomfp.jomfp_431_21] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/20/2021] [Accepted: 01/21/2022] [Indexed: 11/08/2022] Open
Abstract
Background In the COVID-19 age, attempts are being made to raise student awareness and improve best practices to contain the outbreak. Methodology The target population was interns and 3rdyear undergraduate students from JSS Dental College and Hospital, Mysuru. COVID-19 knowledge, awareness and attitude of the students and interns and the preparedness to tackle the current COVID 19 pandemic were assessed. Results 120 respondents responded via a contented validated self-administered questionnaire with regard to knowledge, attitude and practices and preparedness to address the COVID 19 pandemic by undergraduates and interns. The student participants irrespective of their years into practice were aware of the guidelines being issued by Health care authorities and to address the COVID 19 pandemic. Among the respondents, 57.5% were 3rd year dental students and 42.5% were interns. Regarding knowledge about COVID infection, 42.9% (3rd year students) and 57.1% of the interns were aware of the recent developments, 34.1% of the III year students were aware of the safe distance to be maintained between patients, 42.4% of the students and 57.6% of interns were aware of the authority to be contacted with suspected COVID 19 infections. The participants were also aware of the vaccine trial which was conducted. Most of the respondents (64.3% of the students and 78.6% of the interns) were aware of fumigation in clinical or high-contact areas on a daily basis and biweekly in nonclinical areas. Conclusions The results suggest a strong need to encourage the current training program among students in health care-related fields.
Collapse
Affiliation(s)
- S Meenakshi
- Department of Prosthodontics, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - Anupama Aradya
- Department of Prosthodontics, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India,Address for correspondence: Dr. Anupama Aradya, Department of Prosthodontics, JSS Dental College and Hospital, JSSAHER, Mysore - 570 015, Karnataka, India. E-mail:
| | - H. S. Sreeshyla
- Department of Oral Pathology and Microbiology, JSS Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - Narahari Ranganatha
- Department of Oral and Maxillofacial Surgery, Shree Rajarajeswari Dental College and Hospital, JSSAHER, Mysore, Karnataka, India
| | - Smitha Thammaiah
- Department of Oral and Maxillofacial Pathology, Vokkaligara Sangha Dental College and Hospital, Bengaluru, Karnataka, India
| |
Collapse
|
17
|
Kowsalya N, Meenakshi S, Gowrav MP, Gowda DV, Divith K. Applications and Biological Functions of Exosomes: A Comprehensive Review. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i56b33951] [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
Exosomes are also known as extracellular vesicles (EVs) which is bounded by a membrane mostly seen in eukaryotic cells secreted within the endosomal compartment along with some of the selected composition of RNA, proteins, lipids and DNA. They are capable of transferring signals among cells therefore it is used as a mediator for cell-to-cell communication. Exosomes helps in the excretion of cellular waste from the body. Exosomes possess various widespread activity in many of the biological functions such as transferring the biomolecules like enzymes, proteins, ribonucleic acid, lipids and also in the regulation of various pathological and physiological process in various diseases. Exosomes are released in to the in vitro growth medium with the help of cultured cells. They are said to be identified in coined matrix and tissue matrix. They are also identified in some of the biological fluids such as cerebrospinal fluid, urine, blood. Exosomes are considered as promising biomarkers in identification and treatment of many diseases as they contribute a lot in the diagnosis of various therapies. The efficacy and stability of imaging probes and therapeutics are enhanced by its biocompatible nature. Exosomes play a major role because of their use in the field of clinical application. It is important to understand the molecular mechanism behind their function and transport in order to explore more about exosomes. Here we discuss about the review and advancement done in the field of exosomes along with their biomedical applications, isolation techniques and biological functions.
Collapse
|
18
|
Meenakshi S, Dureja S, Kavita GC, Pallavi M, Swamy KNR, Kottur A, Ramu R. The Gag Reflex: A Hurdle in Dentistry– Literature Review. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i46b32937] [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
Gagging reflex poses a hurdle in numerous dental procedures. It causes discomfort for the patient, extended procedure time for the clinician, compromised quality of treatment and along with a lot of physiological discomfort for both. The normal gag reflex is protective in nature, but few individuals elicit extreme response, leading to problems during the treatment procedures. It is extremely important for the clinician to identify the cause and severity of the condition so that it can be decided whether the patient can handle standard treatment techniques or whether alternative methods must be considered. There is no universal solution for successfully managing the gagging patient. Various modalities can be used according to the doctor’s assessment and patient’s conditions in order to control the gag reflex so that the patient can be comfortable and cope with the dental treatment. A wide range of management solutions are available, and many cases need a combination of therapeutic procedures. The main aim of the present article is to comprehensively report the clinical significance, etiology, symptoms and various management approaches used during prosthodontic treatments.
Collapse
|
19
|
Meenakshi S, Anitta S, Sivakumar A, Martin Britto Dhas S, Sekar C. Shock waves exposed α-Fe2O3 nanoparticles for electrochemical sensing of riboflavin, uric acid and folic acid. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106403] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
20
|
Moin A, Meenakshi S, Rizvi SMD, Nandini N, Hussain T, Hussain A, Meghana GS, Manohar M, Sathishbabu P, Gowda DV. A Comprehensive Review and Perspective of Herbal Medicines in the Treatment of COVID-19. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i26a31473] [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: An emergent COVID-19 outbreak originated in Wuhan City, in December 2019. The COVID-19 contamination has swiftly unfold from Wuhan to maximum different provinces and different 24 countries. WHO declared a public health emergency of global concern over this worldwide COVID-19 outbreak on 30th January 2020. Manifold research has been intensely initiated for immunization and drug development for COVID-19 till date no specific vaccine or approved drugs are accessible for COVID-19. Alternatively, therapy consists of supportive care and non-specific anti-viral, anti-malarial, and antibiotics are being testedas drugs for COVID-19. Though, novel approaches could play a crucial role to combat mortality rate and patient recovery in the treatment of COVID-19.
Objective: To reveal the epidemiology, pathophysiology, and comparison of promising synthetic and natural drug targets to avert and cure of COVID-19.
Method: This article sets a brief understanding of the viral characteristics, its life cycle, infection to humans, and the pathophysiology of the disease. It also throws light on the currently used synthetic medicines. we have reviewed the effect of natural products to prevent or treat COVID-19 infection. Their mechanisms of action have been elaborately discussed. literature research was undertaken using PubMed, Google Scholar, Scopus, and WHO website. The different herbal products (extracts) and their moieties which are promising as anti-SARS-CoV-2 by direct inhibition of the virus replication or entry has also been discussed.
Results and Conclusion: In conclusion we have highlighted that natural therapeutics either alone or in combinationcould be used as alternative medicines to treat/prevent COVID-19 infection. Moreover, their structures may offer clues for the development of anti-SARS-CoV-2 drugs.The integration of nanocarriers for effectively delivering the conventional as well as the herbal drugs becomes a key point for their efficacy and safety.
Collapse
|
21
|
Rama R, Meenakshi S, Pandian K, Gopinath SCB. Room Temperature Ionic Liquids-Based Electrochemical Sensors: An Overview on Paracetamol Detection. Crit Rev Anal Chem 2021; 52:1422-1431. [PMID: 33622098 DOI: 10.1080/10408347.2021.1882834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 02/03/2023]
Abstract
Paracetamol (PAR) is an effective antipyretic and analgesic drug utilized worldwide, safer at therapeutic levels but over-dosing and the chronic usage of PAR results in accumulation of toxic metabolites, which leads to kidney and liver damages. Hence, a simple, rapid, cost-effective, and sensitive analytical technique is needed for the accurate determination of PAR in pharmaceutical and biological samples. Though numerous techniques have been reported for PAR detection, electrochemical methods are being receiving more interest due to their advantages. Moreover, in the past few decades, room temperature ionic liquids (RTILs) have been utilized in electrochemical sensors due to their attractive properties. In this present review, authors gathered research findings available for the determination of PAR using RTIL-based electrochemical sensors and discussed. The advantages and limitations in these systems as well as the future research directions are summarized.
Collapse
Affiliation(s)
- R Rama
- Department of Chemistry, School of Basic Sciences, VELS Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, Tamil Nadu, India
| | - S Meenakshi
- Department of Chemistry, School of Basic Sciences, VELS Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, Tamil Nadu, India
| | - K Pandian
- Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India
| | - S C B Gopinath
- Institute of Nanoelectronic Engineering, Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia.,Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia
| |
Collapse
|
22
|
Rama R, Meenakshi S, Manjunathan J, Abirami G, Karthikeyan S. Furoate Based Functionalised Ionic Liquid: Antimicrobial and Antioxidant Studies. Aust J Chem 2021. [DOI: 10.1071/ch20178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A tetraalkyl ammonium cation and furoate anion based functionalised ionic liquid (FIL), N-methyl-N,N,N-trioctylammonium furoate ([MTOA]+[FA]–) has been synthesised and characterised using FT-IR, NMR, and UV spectroscopic techniques. The invitro antimicrobial activity of the synthesised FIL against two types of Gram-positive bacteria, namely Staphylococcus aureus and Enterobacter faecalis as well as Gram-negative bacteria, namely Escherichia coli and Pseudomonas aeruginosa was tested using a well diffusion method. Similarly, an antifungal test was done against Candida albicans. [MTOA]+[FA]– showed significant inhibitory effect against all the organisms tested as compared with the chosen standards. Antibacterial activity against gram-positive bacteria (zone of inhibition: 16 to 30mm) was found to be higher than that of Gram-negative bacteria (zone of inhibition: 11 to 19mm). Moreover, the antioxidant activity of the synthesised FIL from a ferrous ion (Fe2+) chelating assay and its scavenging activity against 1,1-diphenyl-2-picrylhydrazyl, H2O2, and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) free radical using spectrophotometric methods are reported. The FIL, [MTOA]+[FA]– showed a moderate antioxidant activity.
Collapse
|
23
|
Yu F, Alvarez J, Ribeiro R, Rosales R, Adamson M, Xin L, Gellner B, Meenakshi S, Chopra C, Wu J, Zhang Y, Rahmani A, Alie E, Rao V, Badiwala M. DIALYSIS IMPROVES MYOCARDIAL PRESERVATION DURING EX SITU HEART PERFUSION. Can J Cardiol 2020. [DOI: 10.1016/j.cjca.2020.07.224] [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: 10/23/2022] Open
|
24
|
Lakshmi SV, Srilatha A, Satyanarayana D, Reddy LS, Chalapathi SB, Meenakshi S. Oral health knowledge among a cohort of pregnant women in south India: A questionnaire survey. J Family Med Prim Care 2020; 9:3015-3019. [PMID: 32984165 PMCID: PMC7491853 DOI: 10.4103/jfmpc.jfmpc_329_20] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 03/23/2020] [Accepted: 04/09/2020] [Indexed: 11/12/2022] Open
Abstract
Aim: To assess oral health knowledge of pregnant women visiting Government Maternity Hospital, Hyderabad. Materials and Method: A cross-sectional survey was carried out among 606 pregnant women aged 18–40 years old. Oral health knowledge of respondents was assessed using the 14-item self-administered questionnaire and responses were recorded on a dichotomous scale (yes/no). The data were analyzed using Statistical Package for Social Sciences (SPSS) package version 20.0. Results: Overall inadequate knowledge regards to oral health was observed among 55.8% pregnant women. Based on knowledge regarding tooth decay, 71.6% of study participants believed that every painful tooth has to be removed and 81% of respondents were unaware of brushing with fluoridated toothpaste prevents tooth decay. Similarly, with respect to gum disease, 77.7% of subjects were not aware of gum disease and around 49.8% unacquainted that bleeding during tooth brushing indicates gum problems. It is enriching to observe, 94.1% of respondents felt oral health is important for general health. On the other hand, a quite alarmingly high percentage (73.9%) of subjects does not know the relationship between oral health and pregnancy. Furthermore, 91.1% and 65.5% of participants were ignorant that pregnancy can increase the tendency of gums to swell or bleed and poor oral health affect their unborn baby, respectively. More than three-fourths of the study participants (84%) had never visited dentist Conclusion: The study highlights limited knowledge allied to oral health among pregnant women and problem-oriented dental visits indicating an urge among this group to scale up their knowledge.
Collapse
Affiliation(s)
- S Venkata Lakshmi
- Department of Public Health Dentistry, Vinayaka Mission's Sankarachariyar Dental College, Salem, Tamil Nadu, India
| | - A Srilatha
- Department of Public Health Dentistry, Panineeya Institute of Dental Sciences and Research Centre, Hyderabad, Telangana, India
| | - D Satyanarayana
- Department of Public Health Dentistry, Panineeya Institute of Dental Sciences and Research Centre, Hyderabad, Telangana, India
| | - L Swetha Reddy
- Department of Public Health Dentistry, Panineeya Institute of Dental Sciences and Research Centre, Hyderabad, Telangana, India
| | - Suma B Chalapathi
- Department of Prosthodontics, KLRs Lenora Institute of Dental Sciences, Rajahmundry, Andhra Pradesh, xyi, India
| | - S Meenakshi
- Department of Prosthodontics, JSS Dental College and Hospital, JSS Academy of Higher Education and Research, Mysuru, Karnataka, India
| |
Collapse
|
25
|
Sirajudheen P, Meenakshi S. Encapsulation of Zn–Fe layered double hydroxide on activated carbon and its litheness in tuning anionic and rhoda dyes through adsorption mechanism. ASIA-PAC J CHEM ENG 2020. [DOI: 10.1002/apj.2479] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- P. Sirajudheen
- Department of Chemistry The Gandhigram Rural Institute—Deemed to be University Dindigul India
- Department of Chemistry Pocker Sahib Memorial Orphanage College Malappuram India
| | - S. Meenakshi
- Department of Chemistry The Gandhigram Rural Institute—Deemed to be University Dindigul India
| |
Collapse
|
26
|
Meenakshi S, Pandian K, Gopinath S. Quantitative simultaneous determination of pentoxifylline and paracetamol in drug and biological samples at graphene nanoflakes modified electrode. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2019.11.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
27
|
Sirajudheen P, Meenakshi S. Lanthanum (III) incorporated chitosan-montmorillonite composite as flexible material for adsorptive removal of azo dyes from water. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.matpr.2019.11.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
28
|
Karthik M, Meenakshi S, Munavar M. Unveiling the molecular basis for pleiotropy in selected rif mutants of Escherichia coli: Possible role for Tyrosine in the Rif binding pocket and fast movement of RNA polymerase. Gene 2019; 713:143951. [DOI: 10.1016/j.gene.2019.143951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 10/26/2022]
|
29
|
Meenakshi S, Suganthi M, Sureshkumar P. Segmentation and Boundary Detection of Fetal Kidney Images in Second and Third Trimesters Using Kernel-Based Fuzzy Clustering. J Med Syst 2019; 43:203. [PMID: 31134404 DOI: 10.1007/s10916-019-1324-3] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 05/03/2019] [Indexed: 11/28/2022]
Abstract
Organ segmentation is an important step in Ultrasound fetal images for early prediction of congenital abnormalities and to estimate delivery date. In many applications of 2D medical imaging, they face problems with speckle noise and object contours. Frequent scanning of fetal leads to clinical disturbances to the fetal growth and the quantitative interpretation of Ultrasonic images also a difficult task compared to other image modalities. In the present work a three-stage hybrid algorithm has been developed to segment the US fetal kidney images for the detection of shape and contour. At the first stage the hybrid Mean Median (Hybrid MM) filter is applied to reduce the speckle noise. Then a kernel based Fuzzy C - means clustering is used to detect the shape and contour. Finally, the texture features are obtained from the segmented images. Based on the obtained texture features, the abnormalities are detected. The Gaussian Radial basis function provides an accuracy of 80% at the second and third trimesters with weighted constant ranging from 4 to 8, compared to other global kernel functions. Similarly the proposed method has an accuracy of 86% with compared to other FCM techniques.
Collapse
Affiliation(s)
- S Meenakshi
- Mahendra College of Engineering, Salem, 636106, India.
| | - M Suganthi
- Mahendra College of Engineering, Salem, 636106, India
| | - P Sureshkumar
- Mahendra Engineering College, Namakkal, 637503, India
| |
Collapse
|
30
|
Veeramuthu A, Meenakshi S, Ashok Kumar K. A neural network based deep learning approach for efficient segmentation of brain tumor medical image data. IFS 2019. [DOI: 10.3233/jifs-169980] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- A. Veeramuthu
- Department of Information Technology, Sathyabama Institute of Science and Technology, Chennai, India
| | - S. Meenakshi
- Department of Information Technology, Jeppiaar SRR Engineering College, Padur, Chennai, India
| | - K. Ashok Kumar
- Department of Computer Science and Engineering, Sathyabama Institute of Science and Technology, Chennai, India
| |
Collapse
|
31
|
Meenakshi S, Suganthi M, Suresh Kumar P. An approach for automatic detection of fetal gestational age at the third trimester using kidney length and biparietal diameter. Soft comput 2019. [DOI: 10.1007/s00500-019-03913-8] [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: 10/27/2022]
|
32
|
Meenakshi S, Munavar MH. Microarray based transcriptome profile data of ∆ lon and ∆ lon rpoB12 strains of Escherichia coli. Data Brief 2018; 21:582-586. [PMID: 30377646 PMCID: PMC6202797 DOI: 10.1016/j.dib.2018.10.020] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 09/30/2018] [Accepted: 10/05/2018] [Indexed: 11/24/2022] Open
Abstract
The data presented in this article shows the microarray based transcriptome profiles of ∆lon and ∆lon rpoB12 strains of Escherichia coli. The rif mutation namely, rpoB12 was isolated spontaneously in the background of ∆lon strain (over-produces colanic acid capsular polysaccharide) as a suppressor for over-production of colanic acid capsular polysaccharide (Meenakshi and Munavar, 2015) [1]. The E. coli strains were grown in LB medium at 30 °C overnight in duplicates. Total RNA from each samples were isolated and microarray based transcriptome profiles were studied and compared. The detailed methodology and data are given in this article. The interpretation of these data are discussed in the research article, “Evidence for Up and Down Regulation of 450 genes by rpoB12 (rif) Mutation and their Implications in Complexity of Transcription Modulation in Escherichia coli” (Meenakshi and Munavar, 2018) [2].
Collapse
Affiliation(s)
- Shanmugaraja Meenakshi
- Department of Molecular Biology, School of Biological Sciences, Centre for Advanced Studies in Functional and Organismal Genomics, Madurai Kamaraj University [University with Potential for Excellence], Madurai 625021, India
| | - M Hussain Munavar
- Department of Molecular Biology, School of Biological Sciences, Centre for Advanced Studies in Functional and Organismal Genomics, Madurai Kamaraj University [University with Potential for Excellence], Madurai 625021, India
| |
Collapse
|
33
|
Meenakshi S, Jancy Sophia S, Pandian K. High surface graphene nanoflakes as sensitive sensing platform for simultaneous electrochemical detection of metronidazole and chloramphenicol. Materials Science and Engineering: C 2018; 90:407-419. [DOI: 10.1016/j.msec.2018.04.064] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 04/06/2018] [Accepted: 04/20/2018] [Indexed: 01/01/2023]
|
34
|
Meenakshi S, Karthik M, Munavar MH. A putative curved DNA region upstream of rcsA in Escherichia coli plays a key role in transcriptional regulation by H-NS. FEBS Open Bio 2018; 8:1209-1218. [PMID: 30087827 PMCID: PMC6070653 DOI: 10.1002/2211-5463.12348] [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: 09/07/2017] [Revised: 10/31/2017] [Accepted: 11/07/2017] [Indexed: 11/24/2022] Open
Abstract
It is well established that in Escherichia coli, the histone‐like nucleoid structuring (H‐NS) protein also functions as negative regulator of rcsA transcription. However, the exact mode of regulation of rcsA transcription by H‐NS has not been studied extensively. Here, we report the multicopy effect of dominant‐negative hns alleles on the transcription of rcsA based on expression of cps‐lac transcriptional fusion in ∆lon, ∆lon rpoB12, ∆lon rpoB77 and lon+ strains. Our results indicate that H‐NS defective in recognizing curved DNA fails to repress rcsA transcription significantly, while nonoligomeric H‐NS molecules still retain the repressor activity to an appreciable extent. Together with bioinformatics analysis, our study envisages a critical role for the putative curved DNA region present upstream of rcsA promoter in the transcriptional regulation of rcsA by H‐NS.
Collapse
Affiliation(s)
- Shanmugaraja Meenakshi
- Department of Molecular Biology School of Biological Sciences Centre for Advanced Studies in Functional and Organismal Genomics Madurai Kamaraj University [University with Potential for Excellence] Madurai India
| | - Maruthan Karthik
- Department of Molecular Biology School of Biological Sciences Centre for Advanced Studies in Functional and Organismal Genomics Madurai Kamaraj University [University with Potential for Excellence] Madurai India
| | - M Hussain Munavar
- Department of Molecular Biology School of Biological Sciences Centre for Advanced Studies in Functional and Organismal Genomics Madurai Kamaraj University [University with Potential for Excellence] Madurai India
| |
Collapse
|
35
|
Srikrupa N, Srilekha S, Sen P, Arokiasamy T, Meenakshi S, Bhende M, Kapur S, Soumittra N. Genetic profile and mutation spectrum of Leber congenital amaurosis in a larger Indian cohort using high throughput targeted re-sequencing. Clin Genet 2018; 93:329-339. [DOI: 10.1111/cge.13159] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 09/22/2017] [Accepted: 10/16/2017] [Indexed: 01/02/2023]
Affiliation(s)
- N.N. Srikrupa
- SNONGC Department of Genetics and Molecular Biology; Vision Research Foundation; Chennai India
- PhD Scholar; Birla Institute of Technology & Science (BITS); Hyderabad India
| | - S. Srilekha
- SNONGC Department of Genetics and Molecular Biology; Vision Research Foundation; Chennai India
| | - P. Sen
- Department of Vitreo-Retinal Services; Medical Research Foundation; Chennai India
| | - T. Arokiasamy
- SNONGC Department of Genetics and Molecular Biology; Vision Research Foundation; Chennai India
| | - S. Meenakshi
- Department of Pediatric Ophthalmology; Medical Research Foundation; Chennai India
| | - M. Bhende
- Department of Vitreo-Retinal Services; Medical Research Foundation; Chennai India
| | - S. Kapur
- Department of Biological Sciences; Birla Institute of Technology & Science (BITS); Hyderabad India
| | - N. Soumittra
- SNONGC Department of Genetics and Molecular Biology; Vision Research Foundation; Chennai India
| |
Collapse
|
36
|
Meenakshi S, Raghunath N, Shreeshyla HS. An Assessment of Teaching and Learning Practices: A Questionnaire Study for Dental Educators of Karnataka. J Int Soc Prev Community Dent 2017; 7:S179-S185. [PMID: 29285474 PMCID: PMC5730981 DOI: 10.4103/jispcd.jispcd_407_16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 09/22/2016] [Accepted: 10/17/2017] [Indexed: 11/25/2022] Open
Abstract
Aims and Objectives: Faculty members of dental institutions are being asked to assume new academic duties for which they have received no formal training. To succeed in new teaching tasks, faculty development through assessment of teaching skills is essential. Materials and Methods: A Self-Assessment Questionnaire consisting 18 closed-ended questions was sent to various faculty members of dental colleges of Karnataka. A total of 210 faculty members volunteered to participate in the study. The response rate was 69.8%. Data gathered were statistically analyzed using SPSS software version 16, Chi-square test, and descriptive statistics. Results: In the present study, 27.3% of participants were unaware of andragogy, 33.3% were unaware of teachers development programs, 44.6% do not obtain student feedback after teaching, 52.6% were unaware of peer review of teaching skills, and 50% were unaware of interprofessional education initiatives. Conclusion: By incorporating teaching and learning skills, dental faculty could acquire competencies and academic credentials to become valuable contributors to the institution. This study emphasizes the areas of improvement in dental school learning environment, based on activation of prior knowledge, elaboration of new learning, learning in context, transfer of learning, and organization of knowledge toward learning.
Collapse
Affiliation(s)
- S Meenakshi
- Department of Prosthodontics, J.S.S. Dental College and Hospital, Jagadguru Sri Shivarathreeshwara University, Mysuru, Karnataka, India
| | - N Raghunath
- Department of Orthodontics and Dentofacial Orthopaedics, J.S.S. Dental College and Hospital, Jagadguru Sri Shivarathreeshwara University, Mysuru, Karnataka, India
| | - H S Shreeshyla
- Department of Oral Pathology, J.S.S. Dental College and Hospital, Jagadguru Sri Shivarathreeshwara University, Mysuru, Karnataka, India
| |
Collapse
|
37
|
Jayakumar R, Meenakshi S. Special Issue: 11th APCCS-2016-Chemistry, Environmental, Biotechnology and Biomedical Aspects of Chitin and Chitosan. Int J Biol Macromol 2017. [DOI: 10.1016/j.ijbiomac.2017.08.159] [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: 10/18/2022]
|
38
|
Kalaiyarasi J, Meenakshi S, Gopinath SCB, Pandian K. Mediator-free simultaneous determination of acetaminophen and caffeine using a glassy carbon electrode modified with a nanotubular clay. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2483-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
39
|
Kalaiyarasi J, Meenakshi S, Pandian K, Gopinath SCB. Simultaneous voltammetric determination of vanillin and guaiacol in food products on defect free graphene nanoflakes modified glassy carbon electrode. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2161-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
40
|
Meenakshi S, Devi S, Pandian K, Devendiran R, Selvaraj M. Sunlight assisted synthesis of silver nanoparticles in zeolite matrix and study of its application on electrochemical detection of dopamine and uric acid in urine samples. Materials Science and Engineering: C 2016; 69:85-94. [DOI: 10.1016/j.msec.2016.06.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 06/02/2016] [Accepted: 06/09/2016] [Indexed: 10/21/2022]
|
41
|
Sangeetha Y, Meenakshi S, Sairam Sundaram C. Corrosion inhibition of aminated hydroxyl ethyl cellulose on mild steel in acidic condition. Carbohydr Polym 2016; 150:13-20. [PMID: 27312608 DOI: 10.1016/j.carbpol.2016.05.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/14/2016] [Accepted: 05/01/2016] [Indexed: 11/28/2022]
Abstract
Aminated hydroxyethyl cellulose (AHEC) was synthesized, characterized using Fourier Transform Infrared spectroscopy (FTIR) and the corrosion inhibition of AHEC on mild steel in 1M HCl was studied using chemical and electrochemical studies. Results obtained in weight loss method showed that inhibition efficiency increased with increase in concentration of AHEC. The adsorption of the inhibitor on metal surface followed Frumkin isotherm. Polarization studies revealed that the AHEC inhibits through mixed mode. Thermodynamic parameters and activation energy were calculated and discussed. FTIR and X-ray diffraction studies (XRD) confirmed the adsorption of the inhibitor. The surface morphology was studied using Scanning Electron Microscope (SEM) and Atomic Force Microscopy (AFM).
Collapse
Affiliation(s)
- Y Sangeetha
- Department of Chemistry, The Gandhigram Rural Institute-Deemed University, Gandhigram 624 302, Tamil Nadu, India
| | - S Meenakshi
- Department of Chemistry, The Gandhigram Rural Institute-Deemed University, Gandhigram 624 302, Tamil Nadu, India
| | - C Sairam Sundaram
- Department of Science and Humanities, Women's Polytechnic College, Lawspet, Puducherry 605 008, India.
| |
Collapse
|
42
|
Meenakshi S, Pandian K, Jayakumari L, Inbasekaran S. Enhanced amperometric detection of metronidazole in drug formulations and urine samples based on chitosan protected tetrasulfonated copper phthalocyanine thin-film modified glassy carbon electrode. Materials Science and Engineering: C 2016; 59:136-144. [DOI: 10.1016/j.msec.2015.08.063] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 07/25/2015] [Accepted: 08/27/2015] [Indexed: 10/23/2022]
|
43
|
Meenakshi S, Munavar MH. Suppression of capsule expression in Δlon strains of Escherichia coli by two novel rpoB mutations in concert with HNS: possible role for DNA bending at rcsA promoter. Microbiologyopen 2015; 4:712-29. [PMID: 26403574 PMCID: PMC4618605 DOI: 10.1002/mbo3.268] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 03/09/2015] [Revised: 04/23/2015] [Accepted: 05/04/2015] [Indexed: 11/29/2022] Open
Abstract
Analyses of mutations in genes coding for subunits of RNA polymerase always throw more light on the intricate events that regulate the expression of gene(s). Lon protease of Escherichia coli is implicated in the turnover of RcsA (positive regulator of genes involved in capsular polysaccharide synthesis) and SulA (cell division inhibitor induced upon DNA damage). Failure to degrade RcsA and SulA makes lon mutant cells to overproduce capsular polysaccharides and to become sensitive to DNA damaging agents. Earlier reports on suppressors for these characteristic lon phenotypes related the role of cochaperon DnaJ and tmRNA. Here, we report the isolation and characterization of two novel mutations in rpoB gene capable of modulating the expression of cps genes in Δlon strains of E. coli in concert with HNS. clpA, clpB, clpY, and clpQ mutations do not affect this capsule expression suppressor (Ces) phenotype. These mutant RNA polymerases affect rcsA transcription, but per se are not defective either at rcsA or at cps promoters. The results combined with bioinformatics analyses indicate that the weaker interaction between the enzyme and DNA::RNA hybrid during transcription might play a vital role in the lower level expression of rcsA. These results might have relevance to pathogenesis in related bacteria.
Collapse
Affiliation(s)
- Shanmugaraja Meenakshi
- Department of Molecular Biology, School of Biological Sciences, Centre for Advanced Studies in Functional and Organismal Genomics, Madurai Kamaraj University [University with Potential for Excellence], Madurai, Tamil Nadu, 625 021, India
| | - M Hussain Munavar
- Department of Molecular Biology, School of Biological Sciences, Centre for Advanced Studies in Functional and Organismal Genomics, Madurai Kamaraj University [University with Potential for Excellence], Madurai, Tamil Nadu, 625 021, India
| |
Collapse
|
44
|
Meenakshi S, Venkatachalam V. FUDT: A Fuzzy Uncertain Decision Tree Algorithm for Classification of Uncertain Data. Arab J Sci Eng 2015. [DOI: 10.1007/s13369-015-1800-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
45
|
Sangeetha Y, Meenakshi S, SairamSundaram C. Corrosion mitigation of N-(2-hydroxy-3-trimethyl ammonium)propyl chitosan chloride as inhibitor on mild steel. Int J Biol Macromol 2015; 72:1244-9. [DOI: 10.1016/j.ijbiomac.2014.10.044] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 10/16/2014] [Accepted: 10/21/2014] [Indexed: 11/25/2022]
|
46
|
Umayaparvathi S, Meenakshi S, Vimalraj V, Arumugam M, Sivagami G, Balasubramanian T. Antioxidant activity and anticancer effect of bioactive peptide from enzymatic hydrolysate of oyster (Saccostrea cucullata). ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.bionut.2014.04.006] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
47
|
Sasikala S, Meenakshi S, Bhat S, Sahu A. Functionalized Bentonite clay-sPEEK based composite membranes for direct methanol fuel cells. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.04.180] [Citation(s) in RCA: 67] [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: 11/25/2022]
|
48
|
Umayaparvathi S, Meenakshi S, Vimalraj V, Arumugam M, Balasubramanian T. Isolation and Structural Elucidation of Antioxidant Peptides from Oyster (Saccostrea cucullata) Protein Hydrolysate. Protein Pept Lett 2014; 21:1073-83. [DOI: 10.2174/0929866521666140417121616] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 04/02/2014] [Accepted: 04/10/2014] [Indexed: 11/22/2022]
|
49
|
Umayaparvathi S, Arumugam M, Meenakshi S, Balasubramanian T. Antioxidant Properties of Protein Hydrolysate Obtained from OysterSaccostrea cucullata(Born, 1778). Journal of Aquatic Food Product Technology 2014. [DOI: 10.1080/10498850.2013.791740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
50
|
Shanmughapriya V, Meenakshi S, Munavar MH. Selective alleviation of Mitomycin C sensitivity in lexA3 strains of Escherichia coli demands allele specificity of rif-nal mutations: a pivotal role for rpoB87-gyrA87 mutations. PLoS One 2014; 9:e87702. [PMID: 24498357 PMCID: PMC3912069 DOI: 10.1371/journal.pone.0087702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 01/02/2014] [Indexed: 11/18/2022] Open
Abstract
Very recently, we have reported about an unconventional mode of elicitation of Mitomycin C (MMC) specific resistance in lexA3 (SOS repair deficient) mutants due to a combination of Rif-Nal mutations (rpoB87-gyrA87). We have clearly shown that UvrB is mandatory for this unconventional MMC resistance in rpoB87-gyrA87-lexA3 strains and uvrB is expressed more even without DNA damage induction from its LexA dependent promoter despite the uncleavable LexA3 repressor. The rpoB87 allele is same as the rpoB3595 which is known to give rise to a fast moving RNA Polymerase and gyrA87 is a hitherto unreported Nal(R) allele. Thus, it is proposed that the RNA Polymerase with higher elongation rate with the mutant DNA Gyrase is able to overcome the repressional hurdle posed by LexA3 to express uvrB. In this study we have systematically analysed the effect of three other rpoB (rif) mutations-two known to give rise to fast moving RNAP (rpoB2 and rpoB111) and one to a slow moving RNAP (rpoB8) and four different alleles of gyrA Nal(R) mutations (gyrA199, gyrA247, gyrA250, gyrA259) isolated spontaneously, on elicitation of MMC resistance in lexA3 strains. Our results indicate that in order to acquire resistance to 0.5 µg/ml MMC cells require both rpoB87 and gyrA87 but resistance to 0.25 µg/ml of MMC can be brought about by either rpoB87, gyrA87, fast moving rpoB mutations or other nal mutations also. We have also depicted increased constitutive uvrB expression in strains carrying fast moving RNAP (rpoB2 and rpoB111) with gyrA87 and another nal mutation with rpoB87 and expression level in these strains is lesser than rpoB87-gyrA87 strain. These results evidently suggest an allele specific role for the rif-nal mutations to acquire MMC resistance in lexA3 strains via increased constitutive uvrB expression and a pivotal role for rpoB87-gyrA87 combination to elicit higher levels of resistance.
Collapse
Affiliation(s)
- Vinod Shanmughapriya
- Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
| | - Shanmugaraja Meenakshi
- Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
| | - M. Hussain Munavar
- Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
- * E-mail:
| |
Collapse
|