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Abstract
A series of 80 patients over the age of 60 years with ankle fractures were reviewed retrospectively. 'Pilon' and talar fractures were excluded; 41 were treated conservatively (MUA) and 39 by operation (ORIF). The mean follow-up was 28 months (range 18-38 months) in the ORIF group and 25.5 months (range 12-40 months) in the MUA group. A statistically significant proportion of patients were satisfied with regard to pain, swelling, stiffness, instability and ranges of movement after ORIF. Anatomical congruity of the ankle mortice was better maintained following ORIF. Poor subjective and objective end results correlated with malalignment of the ankle mortice on the final radiograph at follow-up.
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102
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Ji L, Rzchowski MS, Anand N, Tinkham M. Magnetic-field-dependent surface resistance and two-level critical-state model for granular superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:470-483. [PMID: 10004466 DOI: 10.1103/physrevb.47.470] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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103
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Paterson WG, Anderson MA, Anand N. Pharmacological characterization of lower esophageal sphincter relaxation induced by swallowing, vagal efferent nerve stimulation, and esophageal distention. Can J Physiol Pharmacol 1992; 70:1011-5. [PMID: 1360326 DOI: 10.1139/y92-139] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To characterize the neural pathways involved in lower esophageal sphincter relaxation, intraluminal pressures from the lower esophageal sphincter of the opossum were monitored during swallowing, vagal efferent nerve stimulation, and intraluminal balloon distention in the presence and absence of pharmacologic antagonism of putative neurotransmitters. The combination of atropine, hexamethonium, and 5-methoxydimethyltryptamine, which is known to block ganglionic transmission in the vagal inhibitory pathway to the lower esophageal sphincter, significantly antagonized LES relaxation induced by both swallowing and vagal stimulation, but did not affect the LES relaxation induced by balloon distention. Administration of the nitric oxide synthase inhibitor Nωnitro-L-arginine methyl ester, on the other hand, markedly inhibited LES relaxation induced by vagal stimulation, swallowing, and balloon distention, and this effect was reversed by administration of the nitric oxide synthase substrate L-arginine. These studies indicate that the distension-induced intramural pathway mediating LES relaxation does not involve ganglionic transmission similar to that of the vagal inhibitory pathway to the LES. However, the LES relaxation induced by all forms of stimuli appears to depend on nitric oxide as a final mediator.Key words: ganglionic transmission, muscarinic, nicotinic, serotonergic, nitric oxide.
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104
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Agarwal S, Gupta UR, Daniel CS, Gupta RC, Anand N, Agarwal SS. Susceptibility of glucose-6-phosphate dehydrogenase deficient red cells to primaquine, primaquine enantiomers, and its two putative metabolites. II. Effect on red blood cell membrane, lipid peroxidation, MC-540 staining, and scanning electron microscopic studies. Biochem Pharmacol 1991; 41:17-21. [PMID: 1986741 DOI: 10.1016/0006-2952(91)90005-p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of primaquine (PQ), its enantiomers [(+)PQ,(-)PQ] and hydroxy metabolites [5-hydroxyprimaquine (5HPQ) and 6-desmethyl-5-hydroxyprimaquine (6D5HPQ)] on cell membranes of glucose-6-phosphate dehydrogenase (G-6-PD) deficient red cells were studied in vitro. There was no significant effect of PQ on the malonyldialdehyde (MDA) content of normal and heterozygous red cells, but it caused a significant increase in MDA in G-6-PD deficient red cells (P less than 0.05). There was no noticeable difference between the effects of the two enantiomers on this variable (P greater than 0.05). Compared to PQ, the hydroxy metabolites produced a significantly greater increase in MDA in all the groups studied (P less than 0.001). Of the two hydroxy metabolites, 6D5HPQ was more toxic than 5HPQ. Staining with MC540 showed that exposure to PQ, its enantiomers and two putative metabolites produced significant fluorescence, indicating that the drug produces marked alterations in membrane fluidity. Although the fluorescence was seen both in normal and heterozygous cells, the effect was marked in hemizygous deficient red cells (P less than 0.001). Scanning electron microscopic (SEM) studies revealed that PQ enantiomers had a stomatocytic effect on red cells of normal, heterozygous and hemizygous G-6-PD deficient red cells, whereas the putative metabolites had an echinocytic effect. The effects were most pronounced in G-6-PD deficient red cells.
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105
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Wan JC, McGreer KA, Anand N, Nowak E, Goldman AM. Coulomb blockade on imaged mesoscopic lead grains. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:5604-5609. [PMID: 9996144 DOI: 10.1103/physrevb.42.5604] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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106
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Tandon VK, Vaish M, Khanna JM, Anand N. Synthesis and pharmacological studies of some (1,4)-naphthoquinono[3,2-c]-1H-pyrazoles, 2-substituted amino-1,4-naphthoquinones, and related compounds. Arch Pharm (Weinheim) 1990; 323:383-5. [PMID: 2241532 DOI: 10.1002/ardp.19903230702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Series of (1,4)-Naphthoquinono(3,2-c)-1H-pyrazoles and 2-substituted amino-1,4-naphthoquinones have been synthesised and studied for their possible anticancer activity (animal tumours, Walker 256 carcinosarcoma), Influenza RNA transcriptase activity, antibiotic activity (C. neoformans, T. mentagraphytes, M. canis, A. niger, and C. albicans).
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107
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Singh N, Jain RK, Gupta CM, Anand N. Anti-stress activity in a muramyl-dipeptide. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1990; 28:686-7. [PMID: 2272655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
N-Acetylmuramyl-L-alanyl-D-isoglutamine and some of its derivatives have been examined for anti-stress activity. Amongst these, N-palmitoylmuramyl-L-alanyl-D-isoglutamine is shown to considerably enhance the capacity of animals to endure various types of stress. This indicates that besides acting as immunomodulators and sleep regulators, muramyl dipeptides may also act as anti-stress agents.
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108
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Chatterjee RK, Fatma N, Agarwal VK, Sharma S, Anand N. Comparative antifilarial efficacy of the N-oxides of diethylcarbamazine and two of its analogues. TROPICAL MEDICINE AND PARASITOLOGY : OFFICIAL ORGAN OF DEUTSCHE TROPENMEDIZINISCHE GESELLSCHAFT AND OF DEUTSCHE GESELLSCHAFT FUR TECHNISCHE ZUSAMMENARBEIT (GTZ) 1989; 40:474-5. [PMID: 2623432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The N-oxides of 1-diethyl carbamoyl-4-methyl piperazine (DEC), 3-ethyl-8-methyl, 1,3,8-triazabicyclo (4,4,0) decan-2-one (centperazine) and 1-methyl-4-(pyrrolidin-1-yl-carbonyl) piperazine (CDRI Comp. 72/70) have been evaluated against Limotosoides carinii infection in cotton rats to establish whether conversion of the three antifilarials into N-oxides would lead to exertion of better antifilarial activity. Of the three N-oxides, N-oxide of DEC showed significantly more suppressive effect on circulating microfilariae in comparison to its parent compound. However, adult worms were unaffected. It was observed that basicity of the N-CH3 group did not play major role in exertion of activity of DEC and related compounds. Nevertheless, two other N-oxides were inactive.
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109
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Saxena M, Saxena AK, Raina R, Chandra S, Sen AB, Anand N, Seydel JK, Wiese M. Studies on 2,3,N,N'-substituted 4,4'-diaminodiphenylsulfones as potential antimalarial agents. ARZNEIMITTEL-FORSCHUNG 1989; 39:1081-4. [PMID: 2686657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A series of new 4,4'-diaminodiphenylsulfones substituted at 2 and 3 position and also at primary amino group of the phenyl rings have been synthesized and evaluated for their antimalarial activity against Plasmodium berghei infection in mice. Some of these compounds were active and showed complete inhibition of parasitaemia which included 7a1-7a4, 7b3, 7b4 and 16a at 1 mg/kg i.p. for 4 days and 16a, at 0.3 mg/kg for 4 days. Some compounds tested for their synthetase inhibitory action in cell-free system isolated from P. berghei (7b1, 7b2 and 8b2) were found to be more active than diaminodiphenylsulphone. The difference in order of activity between these in vivo and in vitro tests may be due to differences in their pharmacokinetic properties.
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110
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McGreer KA, Wan JC, Anand N, Goldman AM. Superconducting energy gap in Coulomb staircase tunneling structures. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:12260-12263. [PMID: 9948062 DOI: 10.1103/physrevb.39.12260] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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111
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Agarwal S, Gupta UR, Gupta RC, Anand N, Agarwal SS. Susceptibility of glucose-6-phosphate dehydrogenase deficient red cells to primaquine enantiomers and two putative metabolites--I. Effect on reduced glutathione, methemoglobin content and release of hemoglobin. Biochem Pharmacol 1988; 37:4605-9. [PMID: 3202898 DOI: 10.1016/0006-2952(88)90327-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The effects of the primaquine (PQ) enantiomers, (+)PQ and (-)PQ, and two putative metabolites [5-hydroxyprimaquine (5HPQ) and 6-desmethyl-5-hydroxyprimaquine (6D5HPQ)] on methemoglobin (Met Hb) and glutathione content and release of hemoglobin into plasma from glucose-6-phosphate dehydrogenase (G-6-PD) deficient red cells were studied in vitro. The results show that a 1.5 mM concentration of (-)PQ produced a significantly greater increase in Met Hb content and decrease in reduced glutathione (GSH) level than did (+)PQ. However, the release of plasma hemoglobin was greater with (+)PQ than with (-)PQ. The hydroxy derivatives of primaquine, 5HPQ and 6D5HPQ, were significantly more active than PQ. Their individual effects differed; whereas 5HPQ produced significantly greater reduction in GSH compared to 6D5HPQ, the effect of 6D5HPQ on Met Hb content and release of plasma hemoglobin was greater than that of 5HPQ. The qualitative effects of these compounds on normal, heterozygous and hemizygous G-6-PD deficient red cells were similar, but quantitatively the effects were greatest on hemizygous G-6-PD deficient cells and intermediate on heterozygous cells.
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112
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Chatterjee RK, Fatma N, Jain RK, Gupta CM, Anand N. Litomosoides carinii in rodents: immunomodulation in potentiating action of diethylcarbamazine. THE JAPANESE JOURNAL OF EXPERIMENTAL MEDICINE 1988; 58:243-8. [PMID: 3075985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The antifilarial activity of combination of diethylcarbamazine (DEC) and an immunomodulator, N-Palmitoylmuramyl-L-alanyl-D-isoglutamine (NP-MDP) was evaluated against Litomosoides carinii in cotton rat (Sigmodon hispidus) and Mastomys natalensis. DEC was used at 6 mg/kg in cotton rat whereas it was 75 mg/kg x 5 days in mastomys. The immunomodulator was administered at 62.5 to 500 micrograms/animal x 2 days. Combination therapy with optimum dose of immunomodulator resulted in prolonged and significant suppression of microfilaraemia in comparison to infected animals treated only with DEC. The effective doses of immunomodulator alone or in combination with DEC also caused enhanced antibody titre in treated animals. Though combination therapy resulted in prolonged suppression of microfilaraemia, the effect disappeared slowly and caused no damage to adult worms.
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113
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Jain RK, Gupta CM, Saxena RK, Saxena RP, Saxena KC, Shukla R, Anand N, Costello CE. Synthesis, mass spectral characterization and immunoadjuvant activity of some novel lipophilic derivatives of muramyl dipeptides. Chem Phys Lipids 1986; 41:237-64. [PMID: 3815623 DOI: 10.1016/0009-3084(86)90025-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Some novel lipophilic derivatives of N-acetylmuramyl-L-alanyl-D-isoglutamine (MDP) have been prepared and rigorously evaluated by spectroscopic means. Fast atom bombardment and field desorption mass spectrometry provided information about both molecular weight and structural detail. The new MDP derivatives have been tested in guinea pigs for immunoadjuvant activity using egg albumin as the model antigen. Amongst these derivatives, 6-O-[3-(5-cholesten-3 beta-yloxycarbonyl) propionyl]-N-acetylmuramyl-L-alanyl-D-isoglutamine (CSMDP), 6-O-[3-1,2-dipalmitoyl-sn-glycero-3-carbonyl) propionyl]-N-acetylmuramyl-L-alanyl-D-isoglutamine (GSMDP) and N-palmitoyl muramyl-L-alanyl-D-isoglutamine (PMDP) possessed significantly better activity than MDP, as judged by the antigen-specific antibody and delayed hypersensitivity responses in the immunized animals. In addition, CSMDP was found to induce strong delayed hypersensitivity response even in saline. These three active compounds were also tested for their pyrogenic response in rabbits, and were found to be lesser pyrogenic than MDP. Some of these MDP derivatives hold promise as adjuvants in immunization.
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114
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Gupta CM, Puri A, Jain RK, Bali A, Anand N. Protection of mice against Plasmodium berghei infection by a tuftsin derivative. FEBS Lett 1986; 205:351-4. [PMID: 3527754 DOI: 10.1016/0014-5793(86)80927-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In Plasmodium berghei infections, the mortality rate and parasitaemias were significantly reduced and the mean survival time was considerably enhanced by pretreating the animals with a tuftsin derivative, Thr-Lys-Pro-ARg-NH-(CH2)2-NHCOC15H31. This effect of the modified tuftsin was further increased upon its incorporation in the liposome bilayer. These results indicate that tuftsin and its derivatives may prove useful in enhancing nonspecific host resistance against protozoan infections.
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115
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Salman M, Ray S, Anand N, Agarwal AK, Singh MM, Setty BS, Kamboj VP. Studies in antifertility agents. 50. Stereoselective binding of d- and l-centchromans to estrogen receptors and their antifertility activity. J Med Chem 1986; 29:1801-3. [PMID: 3746826 DOI: 10.1021/jm00159a044] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Centchroman [dl-3,4-trans-2,2-dimethyl-3-phenyl-4-[p-(beta-pyrrolidinoethoxy)phenyl] - 7-methoxychroman hydrochloride], an antifertility agent under clinical evaluation, has been resolved into its optical enantiomers. The cytosol estrogen receptor binding affinity and estrogenic, antiestrogenic and antiimplantation activities of the two enantiomers have been determined. The enantiomers display a 7-fold difference in receptor affinity, and a corresponding difference in stimulation of the uterine growth and antiimplantation activity was observed in rats.
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116
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George CX, Jain RK, Gupta CM, Anand N. Enhancement in anti-Semliki Forest virus activity of ds RNA by a muramyl dipeptide. FEBS Lett 1986; 200:37-41. [PMID: 2422061 DOI: 10.1016/0014-5793(86)80506-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Antiviral activity of an interferon-inducing mycoviral ds RNA against Semliki Forest virus infection was considerably enhanced by N-palmitoylmuramyl-L-alanyl-D-isoglutamine (PMDP), a new muramyl dipeptide. This enhancement in activity was not due to increased production of interferon, but resulted probably from a PMDP-induced increase in nonspecific resistance to infection. These results indicate that a combined treatment with an interferon inducer and muramyl dipeptide may prove highly useful to control effectively viral infections.
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117
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Ratna S, Roy SK, Ray S, Kole PL, Salman M, Madhusudan KP, Sircar KP, Anand N. Centchroman: In vitro metabolism by rat liver homogenate. Drug Dev Res 1986. [DOI: 10.1002/ddr.430070208] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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118
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Patnaik GK, Anand N, Dhawan BN. Studies on a new analeptic agent, centphenaquin (11-(N4-phenylpiperazine)-7,8,9,10-tetrahydro-6H-cyclohepta [b]quinoline dihydrochloride): Part I. Analysis of respiratory stimulant action. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1985; 23:208-13. [PMID: 2867030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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119
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Gupta KA, Saxena AK, Jain PC, Anand N. Syntheses and biological activities of 1,4-disubstituted piperidines. Arch Pharm (Weinheim) 1984; 317:1010-7. [PMID: 6098241 DOI: 10.1002/ardp.19843171206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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120
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Rastogi R, Sharma S, Anand N, Dutta A, Fatma N, Chatterjee RK, Sen AB. Studies of potential filaricides: Part 14--Activity of 1-iso-butoxycarbonyl-4-methylpiperazine against experimental filariasis. J Helminthol 1984; 58:251-4. [PMID: 6542118 DOI: 10.1017/s0022149x00027085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The synthesis and filaricidal activity of 1-iso-butoxycarbonyl-4-methylpiperazine against Litomosoides carinii in Sigmodon hispidus and Dipetalonema viteae in Mastomys natalensis is reported. At an intraperitoneal or oral dose of 3 mg/kg given for 6 days, the compound removed 91% of the circulating microfilariae but had no effect on adult L. carinii. However, it killed all microfilariae and adults of D. viteae at a subcutaneous dose of 50 mg/kg given for 6 days. The compound also possessed chemoprophylactic activity against the larvae of L. carinii and D. viteae at a dose of 30 and 50 mg/kg respectively.
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121
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Cairns JD, Anand N. Combined vitrectomy, intraocular microsurgery and liquid silicone in the treatment of proliferative vitreoretinopathy. AUSTRALIAN JOURNAL OF OPHTHALMOLOGY 1984; 12:133-8. [PMID: 6487183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
This study investigates the effectiveness of combining vitrectomy, scleral buckling, intraocular microsurgery and liquid silicone injection for the treatment of retinal detachment complicated by proliferative vitreoretinopathy: 48 eyes were treated using these techniques combined. Complete attachment was achieved in 16 eyes (33%), partial attachment in 20 eyes (42%), and 12 eyes (25%) remained detached. Vision was improved in 17 eyes (35%), unchanged in 17 eyes (35%), and worse in 14 eyes (30%). Complications included emulsification of the silicone, glaucoma, cataract, band degeneration of the cornea, reproliferation of membranes and passage of silicone into the subretinal space. Significant preservation of mobility vision was achieved. A larger series of patients with longer follow-up will ultimately determine the place of this technique in the management of this complicated problem.
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122
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Weiner JM, Ramsay RJ, Anand N, Cairns JD. Vitreous cytology in primary cerebroretinal malignant lymphoma. AUSTRALIAN JOURNAL OF OPHTHALMOLOGY 1984; 12:33-7. [PMID: 6732656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We report the case of a 72-year-old woman who presented with vitreous opacities of unknown cause. A pars plana vitrectomy yielded material in which there were atypical lymphoid cells consistent with malignant lymphoma. Five months after the vitrectomy, the patient re-presented with cerebral lymphoma. Our report emphasizes the value of cytological examination of the vitreous in selected cases. We also review the features of malignant lymphoma of the retina and stress the cerebroretinal axis of involvement in this disease.
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123
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Thingran AG, Gupta RC, Ray S, Agarwal AK, Singh MM, Anand N. Studies in antifertility agents--Part XLI : Secosteroids--X : Syntheses of various stereoisomers of (+/-) 2,6 beta -diethyl-7 alpha -ethynyl-3-(p-hydroxyphenyl)-trans-bicyclo[4.3.0]nonan-7 beta-ol. Steroids 1983; 42:627-34. [PMID: 6680933 DOI: 10.1016/0039-128x(83)90126-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The syntheses of (+/-) 2 alpha,6 beta -diethyl-7 alpha -ethynyl-3 alpha-(p-hydroxyphenyl)-trans- bicyclo[4.3.0]nonan-7 beta-ol (8), (+/-)2 beta,6 beta-diethyl-7 alpha-ethynyl-3 beta-(p-methoxy-phenyl)-trans-bicyclo[4.3.0]nonan-7 beta-ol 12 and (+/-) 2 alpha,6 beta-diethyl-7 alpha-ethynyl-3 beta-(p-hydroxyphenyl)- trans-bicyclo[4.3.0]nonan-7 beta-ol (18) and their derivatives, which are essentially B-seco-steroids having cis-anti-trans, cis-syn-trans and trans-anti-trans geometries have been carried out. A study of their antiimplantation activities (AI) and receptor binding affinities (RBA) show that trans-anti-trans compounds are biologically most potent, followed by the corresponding cis-anti-trans and cis-syn-trans compounds. The most potent compound 18 is active at 1 mg/kg in rats. Introduction of 7 alpha-ethynyl group increases their AI activity; however, no significant effect on their RBA is observed.
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124
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Salman M, Ray S, Agarwal AK, Durani S, Setty BS, Kamboj VP, Anand N. Antifertility agents. 38. Effect of the side chain and its position on the activity of 3,4-diarylchromans. J Med Chem 1983; 26:592-5. [PMID: 6834394 DOI: 10.1021/jm00358a026] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In a study of the effect of the substituent on the receptor binding affinity (RBA), estrogenicity, and antiimplantation (AI) activity in trans-3,4-diarylchromans, it has been found that demethylation of trans-2, 2-dimethyl-3-phenyl-4-[p-(beta-pyrrolidinoethoxy)phenyl]-7-methoxychroman (centchroman, 1) to the corresponding 7-hydroxy compound (7) results in a 20-fold increase in RBA (112%) without any appreciable change in AI activity. On the other hand, absence of the pyrrolidinoethyl group from the 4-phenyl residue (6) leads to a drop in both RBA and AI activity. A chain length of two to three carbon atoms and a pyrrolidino ring appear to be necessary for activity in these compounds. It has been found that while the trans isomers with the tertiary aminoalkoxy side chain in the para position of the 4-phenyl radical were the most active, in the corresponding cis-chromans and chromenes, analogues with this chain in the meta position were most active; the ortho substituted compounds of all these series were inactive. In 3-phenyl-substituted compounds, the trans isomer carrying the p-hydroxy substituent (33) was found to be the most active; the corresponding pyrrolidinoethyl ether (13) showed a lower order of activity. The implication of these observations on the mapping of the different subsites on the receptor has been discussed.
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125
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Patnaik GK, Rastogi SN, Anand N, Dhawan BN. Evaluation of local anaesthetic activity of 4-N-butylamino-1,2,3,4-tetrahydroacridine hydrochloride (Centbucridine)--a 4-substituted polymethylenequinoline. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 1982; 20:327-9. [PMID: 7183534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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