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Suneetha G, Ayodhya D, Srikanth K, Manjari PS. Fabrication of CuNPs Using Schiff Base Ligand and Their Catalytic Reduction of Pharmaceutical Drugs, Fluorescence Selective Detection of Cd 2+, Antimicrobial, and Antioxidant Activities. J Fluoresc 2024; 34:1307-1318. [PMID: 37530931 DOI: 10.1007/s10895-023-03342-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 07/06/2023] [Indexed: 08/03/2023]
Abstract
Here, we have approached the synthesis of copper nanoparticles (CuNPs) Schiff base (5-trifluoromethoxy-2-(((2chloro-5-(methyl)phenyl)imino)methyl)phenol)). The synthesized CuNPs were characterized by UV-vis spectroscopy, PL, FTIR, powder XRD, and TEM analysis. From the UV-vis absorption spectroscopy, an absorption peak was observed at 585 nm. As a result of the powder XRD and TEM studies, spherical particle sizes ranged between 4 and 10 nm. FT-IR analysis confirmed the presence of functional groups ‒OH, C=C, -C=N-, and C‒H triggers the synthesis of CuNPs. Further, the catalytic property of the CuNPs were revealed by the degradation of pharmaceutical drugs such as Capecitabine (CAP) and Ciprofloxacin (CIP) in 90 min of reaction time in the presence of NaBH4. The reaction kinetics followed pseudo-first-order with k-values (rate constant) 0.248 min-1 and 0.307 min-1. In addition, the synthesized CuNPs have exhibited selective sensing detection of Cd2+ metal ions in different range of concentration (10-100 µM) by spectrofluorometrically with the limit of detection (LOD) is 0.0284 nM and limit of quantification (LOQ) is 0.0586 nM. The CuNPs revealed significant antioxidant activities against DPPH as a common free radical at 50 µg/mL with 71.24% of scavenging activity. The maximum antimicrobial potential and zone of inhibition of P. Aeruginosa is 17.25±0.8 mm and A. niger is 12.1 mm by using CuNPs.
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Affiliation(s)
- G Suneetha
- Department of Chemistry, University College of Science, Saifabad, Osmania University, Hyderabad, 500004, Telangana State, India
- Department of Chemistry, Telangana University, South Campus, Bhiknur, 503322, Telangana State, India
| | - Dasari Ayodhya
- Department of Chemistry, University College of Science, Saifabad, Osmania University, Hyderabad, 500004, Telangana State, India.
- Chemical Group, Intellectual Property India, Patent Office, GST Road, Guindy, Chennai, 600032, India.
| | - K Srikanth
- Department of Chemistry, Telangana University, South Campus, Bhiknur, 503322, Telangana State, India
| | - P Sunitha Manjari
- Department of Chemistry, University College of Science, Saifabad, Osmania University, Hyderabad, 500004, Telangana State, India.
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Swathi N, Ramanathan M, Srikanth K, Bhavanani AB. Intraocular Pressure Changes Following Three "Head below the Heart" Postures in Yoga Practitioners - A Prospective Observational Study. Int J Yoga 2023; 16:34-37. [PMID: 37583537 PMCID: PMC10424270 DOI: 10.4103/ijoy.ijoy_28_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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/18/2023] [Accepted: 04/05/2023] [Indexed: 08/17/2023] Open
Abstract
Context Intraocular pressure (IOP) increases during "sirasasana" and may be a risk factor for the progression of glaucoma. Other "head below heart" asanas may also cause increase in IOP. Aims To determine the change in IOP following three "head below the heart" postures-"meruasana", "viparithakarni," and "sarvangasana". Settings and Design Prospective observational study conducted in a tertiary care hospital over 3 weeks. Materials and Methods Willing, regular yoga practitioners recruited by purposive sampling performed "meruasana", "viparithakarni," and "sarvangasana" in random order according to a 3 × 3 periods cross over study design after baseline measurement of IOP, blood pressure (BP), and pulse rate. Each asana was held for 30 s. Within 15-30 s of completion of asana, IOP, BP, and pulse rate were recorded. There was an interval of 30 min between the asanas. Statistical Analysis Used Normality of data was tested using the Kolmogorov-Smirnov test. Repeated measures of ANOVA with Tukey-Kramer multiple comparisons was used to compare changes in IOP, BP, pulse rate following asana. P ≤ 0.05 was accepted as statistically significant. Results There were 33 participants with a mean age of 29.6 ± 10.5 years (95% confidence interval [CI]: 26.02, 33.18). The mean baseline IOP was 15.5 ± 3.4 mm Hg (95% CI: 14.34, 16.66) in the right eye and 16.7 ± 3.4 mm Hg (95% CI: 15.54, 17.86) in the left eye. IOP showed a significant reduction following each of the three asanas (P < 0.0001). However, neither pulse rate (P = 0.53) nor BP (P = 0.27) showed any change following the asanas. Conclusions "Meruasana," "viparithakarni," and "sarvangasana" when held for 30 s by healthy yoga practitioners resulted in post-asana drop in IOP with no significant change in pulse rate or BP.
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Affiliation(s)
- N. Swathi
- Department of Ophthalmology, Mahatma Gandhi Medical College and Research Institute, Sri Balaji Vidyapeeth, Puducherry, India
| | - Meena Ramanathan
- School of Yoga Therapy, Institute of Salutogenesis and Complementary Medicine, Sri Balaji Vidyapeeth, Puducherry, India
| | - K. Srikanth
- Department of Ophthalmology, Mahatma Gandhi Medical College and Research Institute, Sri Balaji Vidyapeeth, Puducherry, India
| | - Ananda Balayogi Bhavanani
- School of Yoga Therapy, Institute of Salutogenesis and Complementary Medicine, Sri Balaji Vidyapeeth, Puducherry, India
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Kumar V, Srikanth K. Vertically Oscillated Gyrotactic Bio-thermal Convection in a Porous Media. Forces in Mechanics 2022. [DOI: 10.1016/j.finmec.2022.100136] [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: 11/07/2022]
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Rajendran S, Rajalakshmi AR, Srikanth K, Ezhumalai G. Manual small incision cataract surgery: a viable option for cataract with pseudoexfoliation. Int Ophthalmol 2021; 42:1447-1455. [PMID: 34839453 DOI: 10.1007/s10792-021-02134-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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 11/12/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE The aim of the study was to assess the spectrum of clinical presentation, intraoperative challenges and immediate surgical outcome of cataract patients with pseudoexfoliation syndrome (PXF) following manual small incision cataract surgery (MSICS). METHODS This prospective observational study which was conducted in a rural tertiary care hospital included adult patients with cataract and associated PXF. MSICS was performed for all after a complete ophthalmic and systemic examination. Clinical profile, intraoperative and post-operative complications were noted. Uncorrected visual acuity on first day post-surgery was used to assess the surgical outcome following MSICS. RESULTS MSICS was performed in 80 eyes with varying grades of cataract and PXF. The mean age of the patients was 62.5 ± 8.9 years. PXF material on pupillary margin in 77(96%) patients was the most common finding noted. Majority of the patients had advanced cataract (72, 90%) and inadequate mydriasis (62, 77.5%). Posterior capsular rent (8, 10%) and zonular dehiscence (8, 10%) were the intraoperative difficulties faced. Uncorrected visual outcome on first post-operative day was moderate to good in 71 (88.8%) patients, limited by post-operative corneal oedema (21, 26.3%), iritis (31, 38.8%) and aphakia (9, 11.3%). CONCLUSION Patients with pseudoexfoliation had poor pupillary dilatation, advanced cataracts and higher rate of posterior capsular rent. Our study showed good outcome of MSICS in PXF patients, even with advanced cataract suggesting that MSICS is a safe, effective and viable option for patients with PXF and cataract.
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Affiliation(s)
- Sruthi Rajendran
- Anand Eye Hospital Clear Vision Centre, Trivandrum, Kerala, India.,Department of Ophthalmology, Mahatma Gandhi Medical College & Research Institute, Sri Balaji Vidyapeeth (SBV) Deemed to be University, Pondicherry, 607402, India
| | - A R Rajalakshmi
- Department of Ophthalmology, Mahatma Gandhi Medical College & Research Institute, Sri Balaji Vidyapeeth (SBV) Deemed to be University, Pondicherry, 607402, India.
| | - K Srikanth
- Department of Ophthalmology, Mahatma Gandhi Medical College & Research Institute, Sri Balaji Vidyapeeth (SBV) Deemed to be University, Pondicherry, 607402, India
| | - G Ezhumalai
- Senior Statistician & Research consultant, Mahatma Gandhi Medical College & Research Institute, Sri Balaji Vidyapeeth (SBV) Deemed to be University, Pondicherry, 607402, India
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Tarannum, Ravichandra KS, Muppa R, Srikanth K, Kantipudi MJN, Ram KC. Molar Incisor Hypomineralization Prevalence in the Schoolchildren of Gannavaram Mandal, Krishna District, Andhra Pradesh, India: A Cross-sectional Study. Int J Clin Pediatr Dent 2021; 14:737-740. [PMID: 35110863 PMCID: PMC8783217 DOI: 10.5005/jp-journals-10005-2097] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
AIM AND OBJECTIVES To evaluate the prevalence of molar incisor hypomineralization (MIH) in schoolchildren of the ages between 8 and 14 years of Gannavaram Mandal, Krishna district, Andhra Pradesh, India. MATERIALS AND METHODS A total of 2,250 children of ages between 8 and 14 years were selected randomly from different schools. After obtaining requisite permissions from Mandal Educational Officer (MEO), children was screened for the prevalence of MIH according to European Academy of Paediatric Dentistry (EAPD) 2003 diagnostic criteria and severity for MIH was examined using Wetzel and Reckel scale. RESULTS Prevalence of MIH was observed to be 2.1% with higher cases of mild severity and with no sex predilection (p > 0.05). CONCLUSION Early diagnosis and treatment can significantly reduce complications associated with MIH. Very few studies have been conducted in India and studies encompassing extensive population are warranted to better understand its etiology. CLINICAL SIGNIFICANCE MIH lesions lead to carious development. Hence there is need to identify MIH in children as early as possible to reduce the clinical complications. HOW TO CITE THIS ARTICLE Tarannum, Ravichandra KS, Muppa R, et al. Molar Incisor Hypomineralization Prevalence in the Schoolchildren of Gannavaram Mandal, Krishna District, Andhra Pradesh, India: A Cross-sectional Study. Int J Clin Pediatr Dent 2021;14(6):737-740.
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Affiliation(s)
- Tarannum
- Department of Pedodontics and Preventive Dentistry, Drs Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnoutpalli, Gannavaram Mandal, Krishna, Andhra Pradesh, India
| | - KS Ravichandra
- Department of Pedodontics and Preventive Dentistry, Drs Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnoutpalli, Gannavaram Mandal, Krishna, Andhra Pradesh, India
| | - Radhika Muppa
- Department of Pedodontics and Preventive Dentistry, Drs Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnoutpalli, Gannavaram Mandal, Krishna, Andhra Pradesh, India
| | - Koya Srikanth
- Department of Pedodontics and Preventive Dentistry, Drs Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnoutpalli, Gannavaram Mandal, Krishna, Andhra Pradesh, India
| | - Mrudhula JN Kantipudi
- Department of Pedodontics and Preventive Dentistry, Drs Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnoutpalli, Gannavaram Mandal, Krishna, Andhra Pradesh, India
| | - K Chaitanya Ram
- Department of Pedodontics, Anil Neerukonda Institute of Dental Sciences, Visakhapatnam, Andhra Pradesh, India
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Kumar V, Srikanth K. An overstability analysis of vertically vibrated suspension of active swimmers subjected to thermal stratification. SN Appl Sci 2021. [DOI: 10.1007/s42452-021-04545-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
AbstractThe present article focuses on the analytical approach to discuss the thermo–vibrational convection in a suspension of the active (gyrotactic) swimmers. The onset of instability criterion is investigated for the stationary and oscillatory modes of convection in a shallow fluid layer with no–slip and rigid–free walls. The eigenvalue problem is tackled by Galerkin scheme to get the desired stability diagram and the correlation between the critical Rayleigh numbers. The overstability in suspension is possible when the unstable density gradient of the gyrotactic particles is opposed by the density variation due to thermo–vibrational influence. The suspension is destabilized due to gyrotactic up–swimming while the increase in Péclet number stabilizes the system. The stabilizing influence of vertical vibration is considerably affected due to thermal gradient which destabilizes the suspension. An interesting result of this study is the influence of thermo–vibrational parameter which is associated with applied thermal and vibrational properties. We reported that the destabilizing nature of thermo–vibrational parameter becomes thermally or vibrationally governed when the suspension is heated or cooled from below. When compared to the rigid–rigid boundaries, the displayed profiles for rigid–free walls yielded less stableness in the suspension.
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Neeharika TS, Prasanna Rani KN, Thirupathi A, Anjaneyulu E, Srikanth K, Prabhavathi Devi BL, Prasad RB, Jala RC. Optimization of the enzymatic pre-treatment process for mustard oilseeds using response surface methodology. Grasas y Aceites 2020. [DOI: 10.3989/gya.1284182] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In order to investigate the effect of an enzymatic pre-treatment process for the extraction of oil from black mustard seeds (Brassica nigra) using viscozyme, the reaction parameters such as temperature, buffer-to-seed ratio and enzyme concentration were considered as determinant factors in the central composite design. Optimization was carried out according to the four-variable five-level central composite design of experiments. The effects of enzyme concentration (5–12%), temperature (40–55 °C), pH (5.0–6.0), and reaction time (1–7 h) on the free oil liberated were studied. Residual oil was collected by subjecting the treated meal to soxhlet extraction for 4 h. An enzyme dose of 7.5% (w/w), pH 5.0, 50 °C, and 5 h with constant shaking at 450 rpm were found to be optimal conditions. Centrifuging the mixture at 7000 rpm for 30 min separated the oil with a recovery of 71–73.1%.
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Park W, Srikanth K, Lim D, Park M, Hur T, Kemp S, Dessie T, Kim MS, Lee SR, te Pas MFW, Kim JM, Park JE. Comparative transcriptome analysis of Ethiopian indigenous chickens from low and high altitudes under heat stress condition reveals differential immune response. Anim Genet 2018; 50:42-53. [DOI: 10.1111/age.12740] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2018] [Indexed: 01/22/2023]
Affiliation(s)
- W. Park
- Animal Genomics and Bioinformatics Division; National Institute of Animal Science, RDA; Wanju 55365 Korea
| | - K. Srikanth
- Animal Genomics and Bioinformatics Division; National Institute of Animal Science, RDA; Wanju 55365 Korea
| | - D. Lim
- Animal Genomics and Bioinformatics Division; National Institute of Animal Science, RDA; Wanju 55365 Korea
| | - M. Park
- Animal Breeding and Genomics Division; National Institute of Animal Science, RDA; Wanju 55365 Korea
| | - T. Hur
- Animal Genomics and Bioinformatics Division; National Institute of Animal Science, RDA; Wanju 55365 Korea
| | - S. Kemp
- Animal Biosciences; International Livestock Research Institute (ILRI); P.O. Box 30709 Nairobi 00100 Kenya
| | - T. Dessie
- Animal Biosciences; International Livestock Research Institute (ILRI); P.O. Box 5689 Addis Ababa Ethiopia
| | - M. S. Kim
- Department of Animal Science; College of Agriculture and Life Sciences; Chonnam National University; Republic of Korea Gwangju 61186 Korea
| | - S.-R. Lee
- Department of Agro-biotechnology Convergence; Jeonju University; Republic of Korea 55069 Jeonju Korea
| | - M. F. W. te Pas
- Animal Breeding and Genomics; Wageningen UR Livestock Research; 6700AH Wageningen The Netherlands
| | - J.-M. Kim
- Department of Animal Science and Technology; Chung-Ang University; Anseong Gyeonggi-do 17546 Korea
| | - J.-E. Park
- Animal Genomics and Bioinformatics Division; National Institute of Animal Science, RDA; Wanju 55365 Korea
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Niharika P, Reddy NV, Srujana P, Srikanth K, Daneswari V, Geetha KS. Effects of distraction using virtual reality technology on pain perception and anxiety levels in children during pulp therapy of primary molars. J Indian Soc Pedod Prev Dent 2018; 36:364-369. [PMID: 30324926 DOI: 10.4103/jisppd.jisppd_1158_17] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the influence of using virtual reality (VR) eyeglasses on severity of pain and anxiety during pulp therapy in pediatric patients considering childhood anxiety-related disorders as an important confounding factor in the dental setting. MATERIALS AND METHODS A total of 40 children aged between 4 and 8 years with no previous anxiety disorder were randomly divided into two groups. The study consisted of three consecutive treatment sessions. The two groups received pulp therapy with and without VR eyeglasses in a randomized single-blind-controlled crossover fashion. Then, at the end of each session, the patients' pain severity was assessed using Wong-Baker FACES Pain Rating Scale and state anxiety was measured by Faces version of the Modified Child Dental Anxiety Scale [MCDAS]. Changes in pulse oximeter and heart rate were recorded in every 10 min. The values obtained were tabulated and subjected to statistical analysis. RESULTS The study shows a significant decrease in pain perception (P < 0.001) and state anxiety scores (P < 0.001) with the use of VR eyeglasses during dental treatment. CONCLUSION The results of this study provide an initial encouraging for the use of VR device during dental treatment by pediatric dentists, but additional empirical research is required.
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Affiliation(s)
- Puppala Niharika
- Department of Pediatric Dentistry, Mamata Dental College, Khammam, Telangana, India
| | - N Venugopal Reddy
- Department of Pediatric Dentistry, Mamata Dental College, Khammam, Telangana, India
| | - P Srujana
- Department of Pediatric Dentistry, Mamata Dental College, Khammam, Telangana, India
| | - K Srikanth
- Department of Pediatric Dentistry, Mamata Dental College, Khammam, Telangana, India
| | - V Daneswari
- Department of Pediatric Dentistry, Mamata Dental College, Khammam, Telangana, India
| | - K Sai Geetha
- Department of Pediatric Dentistry, Mamata Dental College, Khammam, Telangana, India
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Niranjan G, Srinivasan AR, Srikanth K, Pruthu G, Reeta R, Ramesh R, Anitha R, Mohana Valli V. Evaluation of Circulating Plasma VEGF-A, ET-1 and Magnesium Levels as the Predictive Markers for Proliferative Diabetic Retinopathy. Indian J Clin Biochem 2018; 34:352-356. [PMID: 31391728 DOI: 10.1007/s12291-018-0753-y] [Citation(s) in RCA: 2] [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] [Received: 09/19/2017] [Accepted: 04/12/2018] [Indexed: 12/15/2022]
Abstract
Diabetic retinopathy (DR) is the most common cause for preventable blindness in India. The onset of micro and macrovascular complications in T2DM is multifactorial and difficult to predict. The status of micronutrients, several inflammatory cytokines, elevated triacylglycerols, oxidative stress etc., are being studied extensively. Hypomagnesemia plays a pivotal role in worsening of insulin resistance. Although, Vascular Endothelial Growth Factor-A (VEGF-A) and Endothelin-1 (ET-1) are known to be elevated in DR, yet few reports cite their role, especially in Indian population. In this study, we included thirty subjects with T2DM in each of the three groups namely, T2DM cases without retinopathy, Non Proliferative DR (NPDR) and Proliferative DR (PDR) retinopathy. The glycemic status, circulating plasma VEGF-A, ET-1 levels, serum magnesium and lipids were estimated and compared among the groups. An ROC was drawn to evaluate VEGF-A, ET-1 and serum magnesium levels as the predictive markers for PDR. On comparison VEGF-A, ET-1 and serum magnesium levels showed a significant difference among the three groups. PDR cases had higher circulating levels of VEGF-A, ET-1 and low serum magnesium levels when compared to others. ROC for VEGF-A and ET-1 showed an optimum cut-off of 1521 ng/ml (AUC 0.975) and 16 pg/ml (AUC 0.96) respectively. A negative ROC was drawn to check the lower cut-off limit for serum magnesium; we documented an optimum cut off of 1.7 mg/dl (AUC 0.837). ET-1, VEGF-A and serum Magnesium levels are significantly altered in PDR and can be used as the predictive markers of PDR.
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Affiliation(s)
- Gopal Niranjan
- Department of Biochemistry, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - A R Srinivasan
- Department of Biochemistry, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - K Srikanth
- Department of Ophthalmology, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - Gowda Pruthu
- Department of Community Medicine, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - R Reeta
- Department of Biochemistry, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - Ramasamy Ramesh
- Department of Biochemistry, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - Rajendiran Anitha
- Department of Biochemistry, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
| | - V Mohana Valli
- Department of Biochemistry, Mahatma Gandhi Medical College and Research Institute (MGMC & RI), SBV, Pillaiyarkuppam, Puducherry 607 402 India
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Pavani K, Suresh Kumar J, Srikanth K, Soares MJ, Pereira E, Neves AJ, Graça MPF. Highly efficient upconversion of Er 3+ in Yb 3+ codoped non-cytotoxic strontium lanthanum aluminate phosphor for low temperature sensors. Sci Rep 2017; 7:17646. [PMID: 29247223 PMCID: PMC5732271 DOI: 10.1038/s41598-017-17725-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [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: 08/16/2017] [Accepted: 11/21/2017] [Indexed: 11/15/2022] Open
Abstract
Er3+ and Er3+/Yb3+ melilite-based SrLaAl3O7 (SLA) phosphors were synthesized by a facile Pechine method. The differences in emission intensities of 4I13/2 → 4I15/2 transition in NIR region when excited with Ar+ and 980 nm lasers were explained in terms of energy transfer mechanisms. Temperature and power dependence of upconversion bands in the visible region centered at 528, 548 and 660 nm pertaining to 2H11/2, 4S3/2 and 4F9/2 → 4I15/2 transitions were investigated. Fluorescence intensity ratio (FIR) technique was used to explore temperature sensing behaviour of the thermally coupled levels 2H11/2/4S3/2 of Er3+ ions in the phosphors within the temperature range 14–300 K and the results were extrapolated up to 600 K. Anomalous intensity trend observed in Er3+ doped SLA phosphor was discussed using energy level structure. Cytotoxicity of phosphors has been evaluated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay in Bluegill sunfish cells (BF-2). The non-cytotoxic nature and high sensitivity of the present phosphors pay a way for their use in vitro studies and provide potential interest as a thermo graphic phosphor at the contact of biological products.
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Affiliation(s)
- K Pavani
- Department of Physics & I3N, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - J Suresh Kumar
- Department of Physics & I3N, University of Aveiro, 3810-193, Aveiro, Portugal
| | - K Srikanth
- CESAM-Centre for Environmental and Marine Studies & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - M J Soares
- Department of Physics & I3N, University of Aveiro, 3810-193, Aveiro, Portugal
| | - E Pereira
- CESAM-Centre for Environmental and Marine Studies & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - A J Neves
- Department of Physics & I3N, University of Aveiro, 3810-193, Aveiro, Portugal
| | - M P F Graça
- Department of Physics & I3N, University of Aveiro, 3810-193, Aveiro, Portugal
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Srikanth K, Lee E, Kwon A, Shin J, Chung H. A comparative proteomic analysis of blood serum for developmental stages in pigs. Anim Genet 2017; 48:531-543. [PMID: 28703288 DOI: 10.1111/age.12571] [Citation(s) in RCA: 2] [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] [Accepted: 04/20/2017] [Indexed: 11/30/2022]
Abstract
This study aimed to differentiate genes at developmental stages of pigs from 0 to 150 days of age, to build up a protein database and to find candidate genetic markers for growth traits. The analysis of two-dimensional electrophoresis and matrix-assisted laser-desorption/ionization mass spectrometry separated 252 protein segments. After successfully blasting the peptide sequences, the analysis confirmed 37 differentially expressed proteins that increased from birth to 150 days of age (type A), whereas the type B proteins presented the inverse pattern. The type C proteins included proteins that were expressed continuously throughout the developmental periods. A total of 319 primer sets for 33 genes were designed to find genetic variants using pooled DNA samples of Yorkshire pigs. Amplification products for all primer sets produced approximately 20 000 clones that were sequenced, and 48 candidate SNP sites were finalized for genotyping. A total of 475 animals were used for high throughput genotyping analysis. Among these, phenotype data of all 475 animals were collected for average daily gain, backfat thickness and days to 90 kg, whereas feed conversion data were collected for 300 animals and body measurement traits (starting weight, ending weight, body length, wither height and chest depth) were collected for 209 animals. Association analysis found significant statistical differences between the animals having genotypes of 13 SNPs (g.78935883C>T, g.147629986C>T, g.98266037T>C, g.214707340G>A, g.88350299C>T, g.17180956C>T, g.17181024C>T, g.2350283A>G, g.138361311C>T, g.44996379C>T, g.44996247A>C, g.107715245C>T, g.4149631C>T) for the various measured traits. The identified genetic polymorphisms, of which one was novel (g.214707340G>A), may serve as candidate molecular markers to change population means for the targeted growth traits.
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Affiliation(s)
- K Srikanth
- Animal Genomics & Bioinformatics Division, National Institute of Animal Science, Iseo, Wanju, 585-800, Korea
| | - E Lee
- Animal Genomics & Bioinformatics Division, National Institute of Animal Science, Iseo, Wanju, 585-800, Korea
| | - A Kwon
- Animal Genomics & Bioinformatics Division, National Institute of Animal Science, Iseo, Wanju, 585-800, Korea
| | - J Shin
- Animal Genomics & Bioinformatics Division, National Institute of Animal Science, Iseo, Wanju, 585-800, Korea
| | - H Chung
- Animal Genomics & Bioinformatics Division, National Institute of Animal Science, Iseo, Wanju, 585-800, Korea
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Seth SK, Mandal S, Srikanth K, Purkayastha P, Gupta P. Electronic Description of the Photophysics of Homo- and Heterodinuclear Cyclometallated Iridium and Rhodium Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601258] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sourav Kanti Seth
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - Soumik Mandal
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - K. Srikanth
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - Pradipta Purkayastha
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - Parna Gupta
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
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Srikanth K, Trindade T, Duarte AC, Pereira E. Cytotoxicity and oxidative stress responses of silica-coated iron oxide nanoparticles in CHSE-214 cells. Environ Sci Pollut Res Int 2017; 24:2055-2064. [PMID: 27807789 DOI: 10.1007/s11356-016-7870-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 11/22/2015] [Accepted: 10/10/2016] [Indexed: 06/06/2023]
Abstract
The present study aimed at investigating cytotoxicity and oxidative stress induced by silica-coated iron oxide nanoparticles functionalized with dithiocarbamate (Fe3O4 NPs) in Chinook salmon cells (CHSE-214) derived from Oncorhynchus tshawytscha embryos. A significant reduction in cell viability was evident in response to Fe3O4 NPs as revealed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay after 24 h of exposure. Out of the tested concentrations (10, 20, and 30 μg/ml), the highest concentration has shown significant decrease in the viability of cells after 24 h of exposure. Alterations in the morphology of CHSE-214 cells was also evident at 10 μg/ml concentration of Fe3O4 NPs after 24 h. Fe3O4 NPs elicited a significant dose-dependent reduction in total glutathione content (TGSH), catalase (CAT), glutathione reductase (GR) with a concomitant increase in lipid peroxidation (LPO), and protein carbonyl (PC) at highest concentration (30 μg/ml) after 24 h of exposure. In conclusion, our data demonstrated that Fe3O4 NPs have potential to induce cytotoxicity in CHSE-214 cells, which is likely to be mediated through reactive oxygen species generation and oxidative stress.
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Affiliation(s)
- K Srikanth
- CESAM-Centre for Environmental and Marine Studies, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Tito Trindade
- CESAM-Centre for Environmental and Marine Studies, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
- Department of Chemistry, CICECO and CESAM, Aveiro Institute of Nanotechnology, University of Aveiro, 3810-193, Aveiro, Portugal
| | - A C Duarte
- CESAM-Centre for Environmental and Marine Studies, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - E Pereira
- CESAM-Centre for Environmental and Marine Studies, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
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Panchakshari V, Srikanth K, Krishna P, Babu CS. Extraction of Chitin and Chitosan from Biowaste of Scampi Macrobrichum rosenbergii and Tiger Shrimp Penaeus monodon. ACTA ACUST UNITED AC 2016. [DOI: 10.20546/ijcmas.2016.507.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bhargav PRK, Chandra TS, Srikanth K, Kumar KS, Ravikanth K, Vimala N. Resection of Unresectable Stage IVB Thyroid Cancer Encasing the Carotid Artery. Indian J Surg 2016; 77:1413-4. [PMID: 27011583 DOI: 10.1007/s12262-014-1166-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 09/11/2014] [Indexed: 11/25/2022] Open
Abstract
Stage IVB thyroid cancer includes carotid encasement or infiltration of the prevertebral fascia and mediastinal vessels. Stage IVB disease is considered unresectable due to grave consequences of attempting resection. We report a rare case of carotid artery engulfment being resected uneventfully without carotid resection.
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Affiliation(s)
- P R K Bhargav
- Endocare Hospital, Dornakal Road, Suryaraopeta, Vijayawada, Andhra Pradesh 520002 India ; Mamata Medical College, Khammam, Hyderabad India
| | - T Satish Chandra
- Endocare Hospital, Dornakal Road, Suryaraopeta, Vijayawada, Andhra Pradesh 520002 India
| | - K Srikanth
- Endocare Hospital, Dornakal Road, Suryaraopeta, Vijayawada, Andhra Pradesh 520002 India
| | - K Sunil Kumar
- Endocare Hospital, Dornakal Road, Suryaraopeta, Vijayawada, Andhra Pradesh 520002 India
| | - K Ravikanth
- Endocare Hospital, Dornakal Road, Suryaraopeta, Vijayawada, Andhra Pradesh 520002 India
| | - N Vimala
- Endocare Hospital, Dornakal Road, Suryaraopeta, Vijayawada, Andhra Pradesh 520002 India
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Ramaswamy N, Mahitha B, Archana P, Ebrahimzadeh M, Srikanth K, Rajinikanth M. In vitro antioxidant and pharmacognostic studies of leaf extracts of cajanus cajan (l.) millsp. Indian J Pharm Sci 2015; 77:170-7. [PMID: 26009649 PMCID: PMC4442465 DOI: 10.4103/0250-474x.156555] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 10/31/2014] [Accepted: 03/18/2015] [Indexed: 11/10/2022] Open
Abstract
Cajanus cajan (L.) Millsp is one of the second most dietary legume crops. The leaf extracts may be used as a potential source of natural antioxidant. The ash values, extractive values, total phenolic and flavonoid content, in vitro antioxidant activity of various leaf extracts as well as anatomical investigation of Cajanus cajan were carried out. Physicochemical parameters such as total, acid-insoluble and water-soluble ash values and moisture content of the leaf powder of C. cajan were found to be 9.50%, 1.40 g/100 g, 4.15 g/100 g drug and 6.72%, respectively. Percent yield of acetone, aqueous, ethanol, ethyl acetate and chloroform leaf extracts were 9.0, 10.6, 13.75, 8.7 and 5.8 g/100 g, respectively. Significant amount of phenolic and flavonoid content were observed. The results of the antioxidant activity were found to be concentration-dependent. The IC50 values for DPPH assay determined for aqueous and ethanol extracts were 0.69 and 0.79 mg/ml, respectively. Reducing power is increased with increasing amount of concentration in both aqueous and ethanol leaf extracts. The highest hydroxyl radical scavenging activity reached up to 83.67% in aqueous and 78.75% in ethanol extracts and in phosphomolybdenum assay the aqueous extract showed strong antioxidant capacity up to 55.97 nM gallic acid equivalents/g. It was found that the aqueous extract possessed highest antioxidant activity in all the assays tested. The antioxidant characteristics of leaf extracts are possibly because of the presence of polyphenols. Microscopic study showed the presence of collenchyma, fibres, xylem, phloem, epidermis, trichomes, palisade tissue, basal sheath, pith and cortex in leaf, petiole and pulvinus.
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Hegde V, Srikanth K. Interradicular dentin dysplasia associated with amelogenesis imperfecta with taurodontism or trichodentoosseous syndrome: a diagnostic dilemma. Indian J Dent Res 2014; 25:269-71. [PMID: 24992867 DOI: 10.4103/0970-9290.135942] [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: 11/04/2022] Open
Abstract
Amelogenesis imperfecta is a hereditary disorder with diverse clinical presentation, where enamel is the tissue that is primarily affected either quantitatively or qualitatively. Hypomaturation/hypoplastic amelogenesis imperfecta with taurodontism is a rare variant of amelogenesis imperfecta which is often confused with trichodentoosseous syndrome. We report a rare case of hereditary enamel defect with taurodontism associated with interradicular dentin dysplasia.
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Affiliation(s)
- Veda Hegde
- Department of Oral Pathology, SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
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Srikanth K, Kumar MA, Selvasundari S, Prakash ML. Colour Doppler Imaging of Ophthalmic Artery and Central Retinal Artery in Glaucoma Patients with and without Diabetes Mellitus. J Clin Diagn Res 2014; 8:VC01-VC02. [PMID: 24959497 DOI: 10.7860/jcdr/2014/6653.4257] [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: 06/07/2013] [Accepted: 01/31/2014] [Indexed: 11/24/2022]
Abstract
PURPOSE To assess the ocular blood flow in Diabetic and non-Diabetic Primary Open Angle Glaucoma (POAG) patients. DESIGN Prospective comparitive study. MATERIAL AND METHODS A total 100 eyes of 50 POAG patients was included in the study and divided into two groups, Group 1 (25 POAG patients without Diabetes mellitus) and Group 2 (25 POAG patients with Diabetes mellitus). Colour Doppler Imaging (CDI) of Ophthalmic artery and Central retinal artery were studied and peak systolic velocity (V max), End diastolic velocity (V min) and Resistivity Index (RI) were assessed. RESULTS Ocular blood flow in Group 2 showed a reduction in V max, V min and increased RI compared to Group I with a statistically significant reduction in the central retinal artery flow (V max (p=0.01), V min (p=0.07) and RI (p=0.03). CONCLUSION CDI showed a significant reduction in the ocular blood flow of POAG patients with Diabetes mellitus.
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Affiliation(s)
- K Srikanth
- Professor, Department of Ophthalmology, Mahatma Gandhi Medical College & Research Institute , Pillayarkuppam, Pondicherry, India
| | - M Ashok Kumar
- Professor and Hod, Department of Ophthalmology, Mahatma Gandhi Medical College , Pillayarkuppam, Pondicherry, India
| | - S Selvasundari
- Professor, Department of Ophthalmology, Mahatma Gandhi Medical College , Pillayarkuppam, Pondicherry, India
| | - M L Prakash
- Professor and HOD, Department of Radiology, Mahatma Gandhi Medical College , Pillayarkuppam, Pondicherry, India
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Pushpalatha HM, Ravichandra KS, Srikanth K, Divya G, Done V, Krishna KB, Patil V. Comparative evaluation of Shear bond strength of different Pit and fissure Sealants in Primary and Permanent teeth - An In-Vitro Study. J Int Oral Health 2014; 6:84-9. [PMID: 24876707 PMCID: PMC4037800] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 01/25/2014] [Indexed: 06/03/2023] Open
Abstract
BACKGROUND Dental caries among children is one of the greatest challenges faced by dentists globally; especially that of susceptible surfaces like the Pit and fissures. Dental sealants have proved to be an effective way to prevent caries development. The Clinical success of any material depends upon its adhesion to tooth structure, resistance to wear and ability to withstand the masticatory or occlusal forces. Hence it is important to evaluate the shear bond strength (SBS). The Present study's aim was to evaluate and compare the shear bond strength of different pit and fissure sealants placed on Primary molars and Permanent Premolars. MATERIALS & METHODS Sixty noncarious extracted teeth comprising of thirty Primary molars and thirty Permanent Premolars were divided into four groups of 15 each. The buccal surfaces of all teeth were dried, etched and the etched surfaces of Primary molars (Group I) and Permanent Premolars (Group III) were placed with Helioseal-F while Groups II and IV, that included Primary molars and Permanent Premolars received Clinpro. Shear bond strength was evaluated and the mean was obtained for all the groups. The results were analyzed using twoway analysis of variance followed by Tukeys post hoc procedure to check for significant differences. RESULTS The specimens of unfilled sealant Clinpro (Groups II & IV) showed higher Shear bond strength when compared to the specimens of filled sealant Helioseal-F (Groups I & III). CONCLUSION The unfilled sealant showed a better Shear bond strength compared to the filled sealant. The bond strength in Primary molars was slightly higher compared to Permanent Premolars. How to cite the article: Pushpalatha HM, Ravichandra KS, Srikanth K, Divya G, Done V, Krishna KB, Patil V. Comparative evaluation of Shear bond strength of different Pit and fissure Sealants in Primary and Permanent teeth - An In-Vitro Study. J Int Oral Health 2014;6(2):84-9.
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Affiliation(s)
- H M Pushpalatha
- Department of Pedodontics & Preventive Dentistry, Al-Badar Rural Dental College & Hospital, Gulbarga, Karnataka, India
| | - K S Ravichandra
- Department of Pedodontics & Preventive Dentistry, Drs. Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India
| | - Koya Srikanth
- Department of Pedodontics & Preventive Dentistry, Drs. Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India
| | - G Divya
- Department of Pedodontics & Preventive Dentistry, Mamata Dental College, Giriprasad nagar, Khammam, Andhra Pradesh, India
| | - Vasanthi Done
- Department of Pedodontics & Preventive Dentistry, CKS Teja Institute of Dental Sciences & Research, Tirupati, Andhra Pradesh, India
| | - K Bala Krishna
- Department of Pedodontics & Preventive Dentistry, K L R Lenora Dental College, Raja Nagaram, Rajahmundry, Andhra Pradesh, India
| | - Vishwanath Patil
- Department of Orthodontics & Dentofacial Orthopedics , HKE's S N Institute of Dental Sciences, Gulbarga, Karnataka, India
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Srikanth K, Pereira E, Duarte AC, Ahmad I. Glutathione and its dependent enzymes' modulatory responses to toxic metals and metalloids in fish--a review. Environ Sci Pollut Res Int 2013; 20:2133-2149. [PMID: 23334549 DOI: 10.1007/s11356-012-1459-y] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 12/27/2012] [Indexed: 06/01/2023]
Abstract
Toxic metals and metalloid are being rapidly added from multiple pathways to aquatic ecosystem and causing severe threats to inhabiting fauna including fish. Being common in all the type of aquatic ecosystems such as freshwater, marine and brackish water fish are the first to get prone to toxic metals and metalloids. In addition to a number of physiological/biochemical alterations, toxic metals and metalloids cause enhanced generation of varied reactive oxygen species (ROS) ultimately leading to a situation called oxidative stress. However, as an important component of antioxidant defence system in fish, the tripeptide glutathione (GSH) directly or indirectly regulates the scavenging of ROS and their reaction products. Additionally, several other GSH-associated enzymes such as GSH reductase (GR, EC 1.6.4.2), GSH peroxidase (EC 1.11.1.9), and GSH sulfotransferase (glutathione-S-transferase (GST), EC 2.5.1.18) cumulatively protect fish against ROS and their reaction products accrued anomalies under toxic metals and metalloids stress conditions. The current review highlights recent research findings on the modulation of GSH, its redox couple (reduced glutathione/oxidised glutathione), and other GSH-related enzymes (GR, glutathione peroxidase, GST) involved in the detoxification of harmful ROS and their reaction products in toxic metals and metalloids-exposed fish.
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Affiliation(s)
- K Srikanth
- Department of Chemistry, Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
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Abstract
Spontaneous globe luxation is a rarely reported condition which can lead to complications like optic neuropathy. Common causes are thyroid eye disease, shallow orbit and floppy eyelid syndrome. We report a case of spontaneous globe luxation with the onset and severity associated with chronic obstructive pulmonary disease (COPD). To our knowledge, this is the first case of spontaneous globe luxation associated with COPD.
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Affiliation(s)
- M Ashok Kumar
- Department of Ophthalmology, Mahatma Gandhi Medical College and Research Institute, Pillayarkupam, Puducherry, India
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Mathew AC, Prince TG, Remees R, Saravanapandian N, Ramalingam S, Srikanth K, Mathai J. Prevalence and Risk Factors of Asthma in School Going Children in South India. Nepal J Epidemiol 2012. [DOI: 10.3126/nje.v2i1.6378] [Citation(s) in RCA: 4] [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: 11/18/2022] Open
Abstract
Background In India, the prevalence of asthma has increased over the last two decades especially in children and young adults. The aim of the study was to estimate the prevalence of asthma in school going children aged 5-10 and 11-15 years in the city of Coimbatore and determine the risk factors associated with it. Materials and methods A school based cross-sectional study was conducted at the urban field practice area of PSGIMSR, Coimbatore between 1st June 2011 and 31st August 2011. The questionnaire was filled by the parents and collected from the children. The data were analyzed using SPSS (11.5version). Results The prevalence of asthma among children aged 5-10 years was 9.5% (95% Confidence Interval (CI) 7.49 – 11.50) and among children aged 11-15 years was 7.27% (95% CI 5.40 – 9.14). The Risk factors significantly associated with asthma among children aged 5-10 years were positive family history of asthma (Odds Ratio (OR)=3.10, 95% CI 1.80 - 5.36), longer duration of time spent in front of television and computer (OR=2.75, 95% CI 1.44 - 5.25), having food allergies (OR=2.36, 95% CI 1.19 - 4.68), and low birth weight of the child (OR=1.79, 95% CI 1.08 - 2.98). The factors significantly associated with asthma among children aged 11-15 years were positive family history of asthma (OR=2.99, 95% CI 1.34 - 6.64), poor ventilation (OR= 4.94, 95% CI 2.72 – 8.93), and use of pillows made up of wool, foam or synthetic material (OR=2.7, 95% CI 1.31 - 5.58). Conclusion Our data suggests that there is a high prevalence of asthma among school going children in Coimbatore. Parental history of asthma was a risk factor in both age groups studied. Television viewing for more than 2 hours, low birth weight and food allergy are additional risk factors for children aged 5-10 years. Poor ventilation and use of pillows made up of wool/ foam/ synthetic material are other risk factors in 11-15 years old children. Appropriate preventive strategies may help reduce the risk of asthma. Children with low birth weight and a family history of asthma need careful evaluation and long term follow up.DOI: http://dx.doi.org/10.3126/nje.v2i1.6378 Nepal Journal of Epidemiology 2012;2 (1):171-178
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Shinde RN, Srikanth K, Sobhia ME. Insights into the permeability of drugs and drug-likemolecules from MI-QSAR and HQSAR studies. J Mol Model 2011; 18:947-62. [DOI: 10.1007/s00894-011-1121-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Accepted: 05/06/2011] [Indexed: 11/24/2022]
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Ravindranath L, Rangaraju K, Srikanth K, Radhakrishana S. Synthesis of 4-[2-(methyl-2-pyridin-2yl-amino)-ethoxy]-benzaldehyde derivatives. HETEROCYCL COMMUN 2010. [DOI: 10.1515/hc.2010.16.1.47] [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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Venkateswara Rao J, Srikanth K, Pallela R, Gnaneshwar Rao T. The use of marine sponge, Haliclona tenuiramosa as bioindicator to monitor heavy metal pollution in the coasts of Gulf of Mannar, India. Environ Monit Assess 2009; 156:451-459. [PMID: 18704727 DOI: 10.1007/s10661-008-0497-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Accepted: 07/24/2008] [Indexed: 05/26/2023]
Abstract
The results of the present research study indicate that the heavy metal accumulation in the marine sponges provide evidence as an excellent bioindicators for monitoring heavy metal pollution between near and offshore environments of Mandapam coast of "Gulf of Mannar (GoM), India". The heavy metal concentrations in sea water and accumulation in the tissues of Haliclona tenuiramosa were analyzed by ICP-MS (inductively coupled plasma-mass spectrometry). The concentrations of metals in the coastal waters of nearshore (< 0.5 km from shore) were always higher than those in the offshore waters (2-5 km away from shore). Likewise, sponges living in the nearshore accumulated greater concentrations of heavy metals (As, Cd, Co, Cu, Fe, Mn and Ni) ranging from 2 to 17 times higher concentration than the sponges located away from the shore. A positive correlation between concentration levels in water and bioaccumulation in tissues was observed. The bioaccumulation of heavy metals in sponge tissue were in order of Fe > Mn > Ni > Cu > As > Co > Cd in both the near and offshore stations. The present results justified that a more comprehensive monitoring of presence of heavy metals in H. tenuiramosa of surrounding GoM, is necessary to help a better mitigation of the problem.
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Affiliation(s)
- J Venkateswara Rao
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad 500 007, India.
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Mathew A, Shaijin S, David R, Ramalingam S, Srikanth K, Yunsheng M. Association Between Obesity and Asthma among Adults: A Hospital Based Case-Control Study. ACTA ACUST UNITED AC 2009. [DOI: 10.3923/aje.2009.33.43] [Citation(s) in RCA: 5] [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: 11/15/2022]
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Ravindranath L, Srikanth K, Ready MD, Begum SDI. Synthesis of novel mannich bases containing Pyrazolones and indole systems. HETEROCYCL COMMUN 2009. [DOI: 10.1515/hc.2009.15.6.443] [Citation(s) in RCA: 4] [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: 11/15/2022] Open
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Venkateswara Rao J, Begum G, Jakka NM, Srikanth K, Nageswara Rao R. Sublethal Effects of Profenofos on Locomotor Behavior and Gill Architecture of the Mosquito Fish,Gambusia affinis. Drug Chem Toxicol 2008; 29:255-67. [PMID: 16777704 DOI: 10.1080/01480540600651543] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Subacute studies of profenofos on mosquito fish, Gambusia affinis, were carried out for 20 days to assess the locomotor behavior and structural integrity of gill in relation to bioaccumulation and targeted enzyme acetylcholinesterase (AChE; EC 3.1.1.7). The sublethal concentration of 0.13 mg/L (1/5 of LC50) altered locomotor behavior such as distance traveled and swimming speed in exposed fish. This could be due to inhibition in the activity of acetylcholinesterase and deformities in the primary and secondary lamella of gill. The bioaccumulation values indicated that the accumulation of profenofos was highest in viscera followed by head and body. The average bioconcentration factor values are 254.83, 6.18, and 2.52 microg/g for viscera, head, and body. The findings revealed that profenofos is highly toxic even at sublethal concentrations to the mosquito fish, Gambusia affinis.
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Affiliation(s)
- J Venkateswara Rao
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, India.
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Sravana Kumar D, Srikanth K, Krishna Rao D. Molecular interactions in the mixtures of 2-chloroaniline with equimolar mixture of methanol and isopropanol/isobutanol. J Mol Liq 2007. [DOI: 10.1016/j.molliq.2007.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Guruprasad K, Srikanth K, Babu AVN. PSSARD: protein sequence-structure analysis relational database. Int J Biol Macromol 2005; 36:259-62. [PMID: 16054209 DOI: 10.1016/j.ijbiomac.2005.06.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2005] [Revised: 06/14/2005] [Accepted: 06/14/2005] [Indexed: 10/25/2022]
Abstract
We have implemented a relational database comprising a representative dataset of amino acid sequences and their associated secondary structure. The representative amino acid sequences were selected according to the PDB_SELECT program by choosing proteins corresponding to protein crystal structure data deposited in the protein data bank that share less than 25% overall pair-wise sequence identity. The secondary structure was extracted from the protein data bank website. The information content in the database includes the protein description, PDB code, crystal structure resolution, total number of amino acid residues in the protein chain, amino acid sequence, secondary structure conformation and its summary. The database is freely accessible from the website mentioned below and is useful to query on any of the above fields. The database is particularly useful to quickly retrieve amino acid sequences that are compatible to any super-secondary structure conformation from several proteins simultaneously.
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Affiliation(s)
- Kunchur Guruprasad
- Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad 500007, Andhra Pradesh, India.
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Samanta S, Srikanth K, Banerjee S, Debnath B, Gayen S, Jha T. 5-N-Substituted-2-(substituted benzenesulphonyl) glutamines as antitumor agents. Part II: Synthesis, biological activity and QSAR study. Bioorg Med Chem 2004; 12:1413-23. [PMID: 15018914 DOI: 10.1016/j.bmc.2004.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2003] [Accepted: 01/07/2004] [Indexed: 11/21/2022]
Abstract
Cancer is a major killer disease throughout human history. Thus, cancer becomes a major point of interest in life science. It was proved that cancer is a nitrogen trap and tumor cells are avid glutamine consumers. The non-essential amino acid glutamine, which is a glutamic acid derivative, supplies its amide nitrogen to tumor cells in the biosynthesis of purine and pyrimidine bases of nucleic acids as well as takes part in protein synthesis. Based on these and in continuation of our composite programme of development of new potential anticancer agents through rational drug design, 17 new 5-N-Substituted-2-(substituted benzenesulphonyl) glutamines were selected for synthesis. These compounds as well as 36 earlier synthesized glutamine analogues were screened for antitumor activity using percentage inhibition of tumor cell count as the activity parameter. QSAR study was performed with 53 compounds in order to design leads with increased effectiveness for antitumor activity using both physicochemical and topological parameters. QSAR study showed that steric effect on the aromatic ring is conducive to the activity. n-butyl substitution on aliphatic side chain and atom no 12 is important for antitumor activity of glutamine analogues.
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Affiliation(s)
- Soma Samanta
- Department of Pharmaceutical Technology, PO Box 17020, Jadavpur University, Kolkata-700032, India
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Nayak SS, Ghosh AK, Srikanth K, Debnath B, Jha T. Antitussive activity of Abies webbiana Lindl. leaf extract against sulphur dioxide-induced cough reflex in mice. Phytother Res 2003; 17:930-2. [PMID: 13680827 DOI: 10.1002/ptr.1263] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The methanol extract of A. webbiana Lindl was evaluated for its effect on a cough model induced by sulphur dioxide gas in mice. When administered orally it exhibited significant antitussive activity compared with the control in a dose dependent manner. The antitussive activity of the extract was compared with that of codeine phosphate, a prototype antitussive agent. The A. webbiana leaf extract (400 and 600 mg/kg) showed maximum inhibition of cough frequency by 71.69% and 78.67%, respectively, when compared with the control group and was comparable in effect to codeine phosphate.
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Affiliation(s)
- S S Nayak
- Natural Science Laboratory, Department of Pharmaceutical Technology, Jadavpur University Kolkata--700 032, India
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Abstract
3D-QSAR studies using MFA and RSA methods were performed on a series of 39MMP-13 inhibitors. Model developed by MFA method has a r(2)(cv) (cross-validated) of 0.616 while its r(2) (conventional) value is 0.822. For the RSA model r(2)(cv) and r(2) are 0.681 and 0.847, respectively. Both the models indicate good internal as well as external predictive abilities. These models provide crucial information about the field descriptors for the design of potential inhibitors of MMP-13.
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Affiliation(s)
- J A R P Sarma
- gvk bioSciences Pvt. Ltd., #210, My Home Tycoon, 6-3-1192, Begumpet, Hyderabad, India.
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Srikanth K, Kumar CA, Ghosh B, Jha T. Synthesis, screening and quantitative structure-activity relationship (QSAR) studies of some glutamine analogues for possible anticancer activity. Bioorg Med Chem 2002; 10:2119-31. [PMID: 11983508 DOI: 10.1016/s0968-0896(02)00079-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We described the syntheses, biological activities and QSAR studies of 36 new 5-n-substituted-2-(substituted benzenesulphonyl) glutamines 6-41 with different substitutions. These compounds were designed as structural analogues of most reactive amino acid, 'glutamine' (GLN), especially in the tumor cells. They present the new basic lateral chains at R(5) position as well as different substitutions at 2', 3', 4', and 5' positions on the benzene ring. The synthesized compounds have been tested for antitumor activity against Ehrlich ascites carcinoma (EAC) in Swiss albino mice using percentage inhibition of tumor weight as inhibitory parameter. In order to elucidate the structural requirements for antitumor activity, quantitative structure-activity relationship (QSAR) studies have been performed using extra thermodynamic model of Hansch. QSAR equations showed that the electronic parameter (sigma) on the aromatic ring system, steric parameter (Es) and to some extent Sterimol length of the substituent (L) on the aliphatic side chain correlate significantly with the antitumor activity. Resonance factor occupies the major electronic contribution on the aromatic ring system to the activity.
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Affiliation(s)
- K Srikanth
- Division of Medicinal Chemistry, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700 032, India.
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Srikanth K, Debnath B, Jha T. Syntheses, biological evaluation and QSAR study on antitumor activity of 1,5-N,N'-disubstituted-2-(substituted benzenesulphonyl) glutamamides. Bioorg Med Chem 2002; 10:1841-54. [PMID: 11937342 DOI: 10.1016/s0968-0896(02)00007-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have reported [unpublished data] the synthesis and QSAR of 5-substituted-2-(substituted benzenesulphonyl) glutamines which have shown the importance of steric factor on the aliphatic chain. N-Phthalyl isoglutamine, having the substitution at position 1 of the glutamic acid moiety, is the metabolite of recently approved thalidomide for different types of tumors by US FDA. Based on these, 36 new 1,5-N,N'-disubstituted-2-(substituted benzenesulphonyl) glutamamides were synthesized, as tools for further elucidation of the structural requirements for antitumor activity. All the synthesized compounds were tested for antitumor activity against Ehrlich Ascites Carcinoma (EAC) in Swiss albino mice using tumor weight as inhibitory parameter. Quantitative structure-activity relationship (QSAR) studies of these analogues revealed that the electron donating groups on the phenyl ring are found to be mandatory for the activity which was also proved by the negative coefficient of indicator parameter I(3,) for NO(2) group on the phenyl ring. Molecular volume (MV) and steric factor at R(5) position also plays a role in ligand-receptor interactions.
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Affiliation(s)
- K Srikanth
- Division of Medicinal and Pharmaceutical Chemistry, Department of Pharmaceutical Technology, Jadavpur University, -700 032, Kolkata, India.
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Srikanth K, Debnath B, Jha T. QSAR study on adenosine kinase inhibition of pyrrolo[2,3-d]pyrimidine nucleoside analogues using the hansch approach. Bioorg Med Chem Lett 2002; 12:899-902. [PMID: 11958989 DOI: 10.1016/s0960-894x(02)00042-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
QSAR studies on series of pyrrolo[2,3-d]pyrimidine nucleoside analogues were performed for their adenosine kinase (AK) inhibitory activity using the Hansch approach. Significant correlations were obtained with hydrophobic parameter at position 'X'. Electronic and steric parameters on pyrimidine and pyrrole rings found to play an important role in the ligand-receptor interactions with the active sites of the enzyme. Presence of bulkier groups at 'X' and 'Y' positions seems to protect the title compounds from biodegradation, as is evident from their positive sterimol steric parameter B1 at these positions.
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Affiliation(s)
- K Srikanth
- Department of Pharmaceutical Technology, Division of Medicinal and Pharmaceutical Chemistry, PO Box No. 17020, Jadavpur University, -700032, Kolkata, India
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Srikanth K, Murugesan T, Kumar CA, Suba V, Das AK, Sinha S, Arunachalam G, Manikandan L. Effect of Trichodesma indicum extract on cough reflex induced by sulphur dioxide in mice. Phytomedicine 2002; 9:75-77. [PMID: 11924768 DOI: 10.1078/0944-7113-00086] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The effect of methanol extract of whole plants of Trichodesma indicum R. Br. has been investigated on sulphur dioxide (SO2) induced cough reflex in Swiss albino mice. The extract has demonstrated significant (p < 0.001) inhibition in frequency of cough in all the tested doses when compared with untreated control group. The effect persisted up to 90 min of its oral administration and also comparable to that of the effect exhibited by the standard drug (Codeine phosphate). This study confirmed the traditional use of this plant in the treatment of cough. Determination of underlying mechanism of beneficial effect is major topic requiring further comprehensive investigation.
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Srikanth K, Kumar CA, Goswami D, De AU, Jha T. Quantitative structure activity relationship (QSAR) studies of some substituted benzenesulphonyl glutamines as tumour suppressors. Indian J Biochem Biophys 2001; 38:120-3. [PMID: 11563323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
As a part of a composite programme of rational drug design (RDD), we had synthesized some substituted benzenesulphonyl glutamines and evaluated their inhibitory activities against Ehrlich Ascites Carcinoma (EAC) cell line in Swiss albino mice. Quantitative structure activity relationship (QSAR) studies of these inhibitory activities using Fujita-Ban model as well as Modified Hansch-Fujita model gave excellent correlations (correlation coefficient r = 0.89 and 0.82 respectively). These results could be useful in designing 'lead' compound with potent inhibitory activity on DNA and RNA synthesis and tumour development.
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Affiliation(s)
- K Srikanth
- Natural Science Laboratory, Division of Medicinal Chemistry, Department of Pharmaceutical Technology, Jadavpur University, Calcutta 700 032, India
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