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Kalaimagal G, Devarajan S, Soundararajan S. Synthesis and Characterization of Poly(Lactic Acid) – Poly(Ethylene Glycol) Copolymer with Boc-Glycine End Groups in Medical Applications. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03589-x] [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: 11/24/2022]
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Britto DR, Soundararajan S, Rizvana S, Ramesh AS, Agalya G. Factors Influencing Drug Adherence among Different Patient Populations in India. J Clin Diagn Res 2022. [DOI: 10.7860/jcdr/2022/58074.17159] [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: 11/23/2022]
Abstract
Drug adherence is an important problem faced worldwide by patients of all age groups. This article aims to address the factors hindering patient adherence to a proper medication regime. Numerous studies have demonstrated that complex dosing schedules and polypharmacy along with financial constraints are the main problems faced by patients. The problems also tend to vary among different patient populations such as diabetics, hypertensives, Chronic Kidney Disease (CKD) patients, and Chronic Obstructive Pulmonary Disease (COPD) patients, posing different challenges in each of the chronic diseases. Multifactorial solutions are needed to improve medication adherence including efforts to improve a patient’s understanding of medication benefits, trust in their doctor and health system, and improving the physician’s recognition and understanding of patients’ beliefs, fears, and values to achieve increased medication adherence.
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Suresh A, Soundararajan S, Elavarasi S, Lewis Oscar F, Thajuddin N. Evaluation and characterization of the plant growth promoting potentials of two heterocystous cyanobacteria for improving food grains growth. Biocatalysis and Agricultural Biotechnology 2019. [DOI: 10.1016/j.bcab.2019.01.002] [Citation(s) in RCA: 5] [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] [Indexed: 10/27/2022]
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Soundararajan S, Narayanan G, Agrawal A, Prabhakaran D, Murthy P. P-16 * THE ROLE OF PERSONALITY AND RELAPSE IN ALCOHOL DEPENDENCE. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu054.16] [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: 11/12/2022] Open
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Soundararajan S, Palanivelu K. Studies on Mechanical, Thermal, Electrical Properties and Accelerated UV Weathering of PP with HIPS Blends. ACTA ACUST UNITED AC 2014. [DOI: 10.9790/019x-0130508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
BACKGROUND Chronic urticaria is a common skin disorder, which causes considerable morbidity. In approximately 40% of cases, patients have an autoimmune disorder in which functional antibodies cause degranulation of mast cells and basophils, and C5a complement augments this in varying amounts from patient to patient. Since the calcineurin inhibitor ciclosporin has been used in chronic autoimmune urticaria, we examined the effect of ciclosporin and other drugs on the release of histamine from basophils when stimulated by sera from patients with chronic autoimmune urticaria. METHODS Leucocytes from healthy donors were isolated and incubated in varying concentrations of ciclosporin, ascomycin, methotrexate, diphenhydramine or hydroxyzine for 30 min prior to stimulation with serum from urticaria patients known to have functional immunoglobulin (Ig)G antibodies directed against the alpha subunit of the IgE receptor. Histamine release was then measured. RESULTS Pre-incubating cells with ciclosporin and ascomycin produced dose-dependent inhibition of histamine release when cells were stimulated by sera of urticaria patients, by purified IgG from these sera, but not by C5a. Inhibition was not prevented by C5a receptor blocking antibodies. No inhibition was seen with methotrexate, diphenhydramine or hydroxyzine. CONCLUSIONS This is the first demonstration of inhibition of histamine release by calcineurin inhibitors employing sera of patients with chronic autoimmune urticaria. These drugs may work by interfering with intracellular signalling in cells following cross-linking of the IgE receptor, but not following stimulation of the C5a receptor.
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Affiliation(s)
- A M Marsland
- Department of Medicine, Division of Pulmonary and Critical Care, Allergy and the Clinical Immunology and the Konishi-MUSC Institute for Inflammation Research, Medical University of South Carolina, Charleston, SC 29425, USA
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Bewtra C, Xie Q, Soundararajan S, Gatalica Z, Hatcher L. Genital human papillomavirus testing by in situ hybridization in liquid atypical cytologic materials and follow-up biopsies. Acta Cytol 2005; 49:127-31. [PMID: 15839614 DOI: 10.1159/000326119] [Citation(s) in RCA: 7] [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: 11/19/2022]
Abstract
OBJECTIVE To describe cases of HPV testing by DNA in situ hybridization performed on atypical cervicovaginal samples collected by a liquidsed method that were negative for HPV DNA on cytology but revealed cervical intraepithelial neoplasia on follow-up biopsies. STUDY DESIGN Three hundred ninety-five consecutive SurePath atypical squamous cells of undetermined significance (ASC-US) cytologic samples from asymptomatic, reproductive-age women were tested for human papillomaviruses (HPVs) by the in situ hybridization (ISH) method (Ventana Inform HPV Test, Tucson, Arizona, U.S.A). One hundred (25%) cases underwent follow-up colposcopic biopsy within 3 months of cytology. All the tests (cytology, ISH, histology) were independently evaluated without knowledge of the other tests. RESULTS One hundred twenty-two (33%) cytologic samples were positive for HPVs. Of a total of 100 (HPV positive and negative) follow-up biopsies, 55 were positive for cervical intraepithelial neoplasia (CIN). Fourteen cases of biopsy-proven CIN tested negative for all HPV types in the prior cytologic samples. Retesting of the 14 CIN tissues by ISH was negative in 10, positive for HPV in 2 and inconclusive in 2. CONCLUSION There is a small but significant (14%) false negative rate with HPV testing by the Ventana ISH method. Clinically suspicious cases should be followed even if an HPV test is negative.
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Affiliation(s)
- C Bewtra
- Department of Pathology, Creighton University Medical Center, Omaha, Nebraska 68131, USA
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Abstract
Urethral duplications are rare anomalies. We present a 3-year-old continent boy passing urine since birth per anus while voiding from penis. Micturating cystourethrogram, retrograde urethrogram and cystoscopy revealed a Y connection between the posterior urethra and anal canal. The accessory channel was excised by a perineal approach. Histopathology revealed that the tract was lined by transitional epithelium, proving that it was indeed a case of urethral duplication; hence, we suggest that all urethroanal fistulas are not variants of anorectal malformations. Certain of these fistulas should be considered as variants of Y-type urethral duplication even if the orthotopic urethra is normal.
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Affiliation(s)
- S Kumaravel
- Department of Paediatric Surgery, Institute of Child Health and Hospital for Children, Madras Medical College Egmore, 600008 Chennai, India
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Soundararajan N, Liu SH, Soundararajan S, Platz MS. Synthesis and binding of new polyfluorinated aryl azides to alpha-chymotrypsin. New reagents for photoaffinity labeling. Bioconjug Chem 1993; 4:256-61. [PMID: 8218481 DOI: 10.1021/bc00022a002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The preparation of several new, water-soluble, polyfluorinated aryl azide reagents for use in photoaffinity labeling studies is described. The ability of some of these reagents and their nonfluorinated controls to noncovalently bind to alpha-chrymotrypsin is reported. It is found that polyfluorination does not interfere with ligand binding.
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Affiliation(s)
- N Soundararajan
- Department of Chemistry, Ohio State University, Columbus 43210
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Abstract
4-(Dihydroxyboryl)-3-nitrobenzoic acid, C7H6BNO6, M(r) = 210.94, monoclinic, P2(1)/n, a = 10.542 (2), b = 6.411 (1), c = 13.105 (4) A, beta = 106.47 (2) degrees, V = 849.3 (4) A3, Z = 4, Dm = 1.65 (flotation in CCl4/1,2-dibromoethane), Dx = 1.649 Mg m-3, lambda(Mo K alpha) = 0.71073 A, mu = 0.135 mm-1, F(000) = 432, T = 293 K, R = 0.0530 for 1328 observed reflections with F > 2 sigma(F). The molecule is flat [the carboxy and nitro groups are rotated 5.8 (4) and 1.9 (4) degrees, respectively, out of the plane] with the boronic acid group almost normal to the plane of the benzene ring, 92.4 (3) degrees. The B atom and one O atom of the nitro group are separated by only 2.457 (4) A implying an interaction that is consistent with observed chemical behavior.
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Soundararajan S, Reddy B. Synthesis, characterization and the reactivity ratios of copolymers of cyclohexyl acrylate with styrene and N-vinyl-2-pyrrolidone. POLYMER 1993. [DOI: 10.1016/0032-3861(93)90755-y] [Citation(s) in RCA: 15] [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] [Indexed: 11/30/2022]
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Soundararajan S, Reddy BSR. Glycidyl methacrylate and N-vinyl-2-pyrrolidone copolymers: Synthesis, characterization, and reactivity ratios. J Appl Polym Sci 1991. [DOI: 10.1002/app.1991.070430204] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Soundararajan S, Badawi M, Kohlrust CM, Hageman JH. Boronic acids for affinity chromatography: spectral methods for determinations of ionization and diol-binding constants. Anal Biochem 1989; 178:125-34. [PMID: 2729565 DOI: 10.1016/0003-2697(89)90367-9] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Arylboronic acids attached to solid matrices have proved useful for the diol-specific chromatography of biomolecules and affinity purification of enzymes by exchangeable-ligand chromatography. The latter use has been limited by the intrinsic ionization constant (pKa approximately 9) of the most common commercial products. The synthesis of several arylboronic acids with ionization constants near neutrality are described, and the application of a new general, spectral-difference method for determining acid ionization constants and formation constants with fructose is developed. In particular 4-(N-methyl) carboxamido-benzeneboronic acid was found to have a pKa of 7.86 and a formation constant with D-fructose of 8600. It was stable toward acid or base hydrolysis. We suggest that 4-carboxybenzeneboronic acid might be useful for preparing matrices for enzyme affinity chromatography.
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Affiliation(s)
- S Soundararajan
- Department of Chemistry, New Mexico State University, Las Cruces 88003
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Soundararajan S, Reddy BSR, Rajadurai S, Thyagarajan G. Synthesis and characterization of lacquers based on styrene acrylic copolymers for applications in leather industry. J Appl Polym Sci 1987. [DOI: 10.1002/app.1987.070340121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Navaneetham NS, Kalyanasundaram R, Rajasekar N, Soundararajan S. Lanthanide perchlorate complexes of 2-acetamidopyridine-1-oxide. J CHEM SCI 1987. [DOI: 10.1007/bf02900714] [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: 11/28/2022]
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Navaneetham N, Kalyanasundaram R, Soundararajan S. Lanthanide chelate complexes of salicyloyl hydrazide-salicylaldehyde schiff base (SHSASB) and anthranilic acid-salicylaldehyde schiff base (AASASB). Inorganica Chim Acta 1985. [DOI: 10.1016/s0020-1693(00)82303-8] [Citation(s) in RCA: 15] [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: 11/27/2022]
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Kalyanasundaram R, Navaneetham NS, Soundararajan S. Lanthanide perchlorate complexes of 4-nitroquinoline-1-oxide and 5-nitroisoquinoline-2-oxide. Monatsh Chem 1985. [DOI: 10.1007/bf00809184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Koppikar DK, Lele MV, Soundararajan S. Hydration numbers of some metal acetates, monochloroacetates and trichloroacetates in solution from ultrasonic velocity and compressibility measurements. J CHEM SCI 1981. [DOI: 10.1007/bf02911728] [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: 11/29/2022]
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Jagannathan R, Soundararajan S. Complexes of lanthanide perchlorates with two new “O,N,O” ligands derived from antipyraldehyde and acetic and benzoic acid hydrazides. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/0020-1650(81)80028-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jagannathan R, Soundararajan S. Complexes of lanthanide perchlorates with N,N,N′,N′-tetramethyl-α-carboxamido-O-anisamide and N,N′-di-t-butyl-α-carboxamido-O-anisamide. Inorganica Chim Acta 1979. [DOI: 10.1016/s0020-1693(00)95467-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ramakrishnan L, Soundararajan S, Sastry VSS, Ramakrishna J. Nuclear Quadrupole Resonance in Coordination Chemistry. Identification of Bridging and Terminal Chlorines in the Mercuric Chloride-4-picoline N-Oxide Complex. Aust J Chem 1979. [DOI: 10.1071/ch9790931] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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
The temperature dependence
of the chlorine-35 n.q.r. in the mercuric chloride-4-picoline
N-oxide complex has been studied from
77 K to room temperature, and the results are used to assign the observed
frequencies to terminal and bridging chlorines.
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Ramakrishnan L, Soundararajan S. Complexes of lanthanide iodides with 4-methylpyridine-1-oxide and 2-methylpyridine-1-oxide. ACTA ACUST UNITED AC 1977. [DOI: 10.1007/bf03046653] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Koppikar D, Soundararajan S. Preparation, IR and nuclear magnetic resonance studies on the rare-earth perchlorate complexes of 3-methylpyridine-1-oxide. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/0022-1902(76)80113-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
N,N-Dimethyl formamide (DMF) and N,N-diphenyl formamide (DPF) complexes of six lanthanide perchlorates of the composition M(DMF)8(ClO4)3 and M(DPF)6(ClO4)3 where M = La, Ce, Pr, Nd, Sm, or Y have been prepared and characterized. The infrared spectra show that the amide is bonded to the metal through oxygen. Conductivity, molecular weight, and spectral studies indicate coordination numbers of eight and six for DMF and DPF complexes respectively, with the perchlorate groups remaining ionic.
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Krishnamurthy VN, Soundararajan S. Refractometric Investigations on Some Rare Earth Nitrates in Aqueous Solution. Z PHYS CHEM 1966. [DOI: 10.1515/zpch-1966-0133] [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]
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