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Colchicine is a potent drug used to probe microtubule dependent processes 1, 2 ; . We have recently shown that substoichiometric concentrations of colchicine-tubulin complex CD ; , a 1: tight binding complex of drug with tubulin, copolymerizes with tubulin to form microtubule copolymers 3 ; . The affinity of the microtubule ends for tubulin decreased as the CD mole fraction in the microtubule increased. Mole fraction ratios as small as 1 CD -5O-100 tubulins in the copolymers were accompanied by a significant change in binding affinities and polymerization rates 3 ; . We have further extended our investigation of the CD-tubulin copolymerization reaction. A kinetic model was derived which relates the composition of the microtubule copolymer to the composition of the reaction mixture. This model allowed a predictive correlation to be made between copolymer composition and the extent of assembly inhibition. The results of our findings are briefly presented below.
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Spirometry Spirometry will be performed for each participant at each visit in accordance with the guidelines from the American Thoracic Society [25]. A test session will consist of several repeated FVC maneuvers. Each maneuver will require the subject to take the deepest possible breath and exhale into a spirometer as hard, fast, and completely as possible. The spirometer will record the volume of air exhaled as a function of time. Each subject will perform at least three FVC maneuvers. For a maneuver to be acceptable, it needs to be a maximal exhalation free from cough, excessive hesitation, leak, obstructed mouthpiece, variable effort, or early termination. At the first visit, pre and post-bronchodilator measurements will be done. For follow-up visits, only pre-bronchodilator values will be measured. Health status measurements During each visit, a disease-specific health measure, St. George's Respiratory Questionnaire SGRQ ; , will be administered by the study co-ordinator at each site [26]. The scores for each section including symptom score frequency and severity ; , activity score activities that cause or are limited by breathlessness ; , and impact score social functioning, psychological disturbances resulting from airways disease ; , as well as a total score will be calculated using established methods [26] and erythromycin, for instance, colchicine molecular weight.
Bill frake, author of connoisseur' s handbook of marijuana runs a very complete colchicine treatment down and warns against smoking the first generation plants all succeeding generations will also be polyploid ; bacause of this poisonous quality.
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Substrates such as progesterone are effective in promoting new cross-links with P350C Fig. 2 ; . In the absence of drug substrate, residue P350C in TM6 can be cross-linked to S993C in TM12. The presence of progesterone, however, promoted crosslinking of residue P350C TM6 ; with two residues in TM 11 A935C and G939C ; and to residue V991C in TM12. One way to explain these results is through a model Fig. 5 ; . Based on the "funnel-shape" model of the TM segments 15 ; , the cytoplasmic ends of TMs 6, 11, and 12 are placed closer together than the extracellular ends Fig. 5A ; . In the absence of substrate, it is possible to cross-link P350C TM6 ; S993 TM12 ; . Therefore, the presence of drug substrate progesterone ; likely causes a slight rotation rearrangement of TM12 relative to TM6 such that residue V991C comes closer to P350C. Colchcine and demecolcine likely induced similar conformational changes, since both drug substrates also promoted cross-linking of mutant P350C TM6 ; V991C TM12 ; . Since TM12 is directly connected to TM11, any rotational or lateral ; movement in TM12 would likely involve similar movement in TM11. When the residues in TM11 are modeled as an -helical wheel, residues A935 and G939C are found on the same face of the TM segment Fig. 5B ; . In the presence of progesterone both residues must come close to P350C TM6 ; to be cross-linked Fig. 1 ; . Cyclosporin A also promoted cross-linking between TM6 and TM11, but only between P350C and G939C. It is possible that cyclosporin A altered the tilt or distance between TM6 and TM11 such that only A939C but not A935C were close enough to P350C to be cross-linked. The ability of a substrate to change the cross-linking pattern suggests that the TM segments can change their shape to accommodate structurally different compounds. Slight rotational and or lateral movement in any TM segment could result in numerous permutations of residues contributing to the drugbinding site. A substrate with one structure would cause specific shifts in the different TM segments responsible for its binding induced-fit ; . Therefore, it follows that common residues could be involved in the binding of different substrates. This would account for the ability of P-gp to bind structurally diverse compounds and exelon.
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1. Thomas-Golbanov C, Sridharan S. Novel therapies in vasculitis. Expert Opin Investig Drugs 2001; 10: 1279 Fitzgerald KD, MacMaster FP, Paulson LD, Rosenberg DR. Neurobiology of childhood obsessive-compulsive disorder. Child Adolesc Psychiatr Clin N 1999; 8: 53375, ix. DOI: 10.1097 01.psy.0000160473.31162.4d.
SUBJECT INDEX TO VOLUME 1 Accentia biopharmaceuticals-sponsored clinical trial BIOVAXID ; .69 Actinic keratoses .53 colchicine in .57 diclofenac in .56 5-flourouracil in .53 imiquimod in .55 retinoids in .57 topical therapy for .53 Acute myeloid leukaemia AML ; .103 antibody treatment for .108 colony stimulating factors for .106 disease resistance in .107 GM-CSF for .106 high dose ara-C with mitoxantrone for .105 high dose cytarabine for .103 timed sequential chemotherapy for .106 treatment of relapse of .103 Alefacept .163 for plaque psoriasis .163 Anastrozole .211 safety profile of .211 Antiemetics .61 Antitumor activity .171 early- to late-phase trials of .171 Arimidex .207 in treatment of early breast cancer .207 Aromatase inhibitors .237 ABCSG 6a trial of .245 ARNO ABCSG8 trial of .244 BIG 1-98 trial of .243 efficacy in adjuvant treatment of .240 IES trial of .244 in adjuvant management of breast cancer .237 in first line metastatic disease .238 ITA trial of .244 lipid metabolism cardiac toxicity of .247 MA17 trial of .245 mechanism of action of .238 musculoskeletal toxicities of .247 pharmacology of .238 toxicity profile of .247 ATAC .207 treatment analysis on .209 Atorvastatin .143 and angioplasty .144 clinical trials of .143 collaborative atorvastatin diabetes study CARDS ; for .145 effect on cardiovascular endpoints .143 effect on vessel structure function .146 in calcific aortic stenosis .145 kidney disease in .146 trials comparing does of .146 trials comparing placebo with .144 vascular function of . 145 vs. fluvastatin rosuvastatin . 149 vs. lovastatin . 148 vs. pravastatin . 147 vs. pravastatin simvastatin lovastatin fluvastatin . 149 vs. simvastatin . 148 with amlodipine . 150 with ASCOT-LLA trial . 145 with ezetimibe . 150 with GREACE trial . 144 with MIRACL trial . 144 with without fibrates . 149 5-Aza-2'-deoxycytidine decitabine ; . 172 early clinical trials of . 172 early- to late-phase trials of . 172 5-Azacytidine . 171 clinical trials for .172, 173 early-phase trials of . 171 Cancer .175, 283 allogeneic tumor cell lysate for . 286 allogeneic vaccines for . 286 allogeneic whole tumor cells for . 286 autologous tumor vaccines for . 286 autologous vaccines for . 286 carbohydrate vaccines for . 284 cytokine modified tumor vaccines for . 287 dendritic cell vaccines for . 287 DNA RNA vaccines for . 285 HDAC histone acetyl transferase activities in . 175 heat shock proteins for . 286 peptide vaccines for . 284 protein vaccines for . 284 specific active immunotherapy of . 283 target antigens for . 284 types of vaccines for . 284 viral vectors for . 285 Carotid endarterectomy CEA ; . 293 for asymptomatic carotid disease . 294 indications for . 293 timing of . 295 Chemotherapy induced emesis . 61 antiemetic trials for . 61 aprepitant trials for . 61 Cladribine . 15 autoimmune disorders in . 15 clinical trials of . 15 acute myeloid leukemia . 25 in autoimmune diseases . 29 in chronic lymphocytic leukemia . 17 in hairy cell leukemia . 16 in hematological malignancies . 15 in indolent lymphoid malignancies . 23 in multiple sclerosis . 27 in Waldenstrom's macroglobulinemia . 23 and fluoxetine.
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Mutants of Chinese hamster ovary cells which have microtubule structures. Recent work on the formation of been obtained after one or two selection steps in the microtubules in vitroindicates that several other proteins are presence of the microtubule inhibitor podophyllotoxin also required in the assemblyprocess 4-7 ; .However, the PodR1 and Podm' mutants, respectively ; and which ex- involvement and precise roleof these other proteins in microhibit very specific types of cross resistance and or tubule structure in vivo is uncertain 8 ; . collateral sensitivity ; towards various other inhibitors The assembly of microtubules both in vivo and in vitro is of microtubule assembly e.g. colchicine, colcemid, steg- blocked by a number of inhibitors, of which colchicine, which nacine, vinblastine, nocodazole, griseofulvin, maytan- binds to the tubulin dimer, is the best characterized 2, 9 ; . sine, taxol, and no cross-resistance to V"26 and pur- The mechanisms of action of other inhibitors of microtubule omycin ; have been analyzed by two-dimensional gel assembly, such as vinblastine, podophyllotoxin, griseofulvin, electrophoresis. In two of the four Pod" mutants, a new protein spot, designated M Mr 66, 000 ; , is ob- nocodazole, maytansine, taxol, etc., are not so well understood pro- 2, 9, 10, ; . Therefore, the sites of action of these drugs could served. Analyses of peptides obtained after partial tease digestion suggest that protein M has arisen by a possibly identify additional structural components involved in charge alteration ina neighboring, more basic protein microtubule assembly in vivo.The genetic approach, in which P ; found in the wild type cells. In the two Podm mutant resistant mutants are isolated and the affected components cells, the P and M proteins were present in a ratio of 1: are identified 12-15 ; , has proved particularly useful in identifying the sitesof action of various inhibitors. It has recently 0.8, whereas in cell hybrids formed between PodR" X Pod' cells, their relative amounts were only about 1: been shown that many of the mutants of CHO' cells which 0.25. This effect of gene dosage on the relativeamounts have simultaneously become resistant to colchicine, colcemid, of P and M proteins is consistent with the co-dominant and griseofulvin 16 ; , and mutants of Aspergillus nidulans class of antimitotic drugs nature of the PodRnmutation and indicates that in the resistant to benomyl benzimidazole mutant cells, only one the two copies of the P gene is 17 show alteration in the , &tubulin structure. of altered. The protein affected in these mutants appears We have recently reported that mutants of CHO cells and to represent one of the microtubule-associated proteins several other mammalian cell lines 18, 19 ; showing 2-4-fold case of sensitive resistance to podophyllotoxin PodR' class ; , another antimiby two criteria: i ; this protein Pin the mutant ; , along with tubulin, totic drug, can be readily selected in a single step. Mutants cells or both P and M in the is released from microtubules upon cold treatment; and showing a higher level of resistance to the drug were also ii ; this protein is released by Ca2 + treatment of the obtained in a second step selection using the PodR' mutants detergent-extracted cytoskeletons prepared from nor PodR" class ; . Preliminary cross-resistance studies 18 ; indimal cells but not from colchicine-pretreated cells cated that these mutants were distinct from the colchucine eZ Duerr, A , Pallas, D., and Solomon, F 1981 ; C Z 24, 203-211 ; . The relative intensities of different spots in and colcemid resistant mutants that had been obtained by lesions did involve permenot gel patterns further suggest that protein P is a major other investigators, and that the cellular constituent present incell extracts in amounts ability alterations 16, 18, 21, ; . Cross-resistance studies reported here reveal that the PodR' and PodR" classes of comparable to tubulin. mutants exhibit very specific types of cross-resistance and or collateral sensitivity ; to various other inhibitors of microtubule assembly, e.g. colchicine, colcemid, vinblastine, griseoMicrotubules are hollow filamentous structures, ubiquitous fulvin, stegnacin, nocodazole, maytansine, and taxol. Based on in eukaryotic cells, which form a cytoplasmic network, and their cross-resistance patterns, the mutants appear to be of are primarily responsible for determining cellular shape and more than one kind. The present paper also examines the for spindle formation required for cell division see Refs. 1-3 ; . nature of biochemical alteration in several PodR' and PodR" In addition, microtubules play an important role in several mutants by two-dimensional gel electrophoresis. The lesions other cellular processes, including motility, axonal growth, in two of the PodR" mutants affect a protein with an approxsecretion and transport ; , and cellular anchorage. Two closely imate molecular weightof 66, 000, which very likely represents related proteins, a- and 3-tubulins, which have been highly one of the microtubule-associated proteins. conserved during evolution, are the major constituents of all and ilosone.
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Biochemical tests were carried out 24 h after the last behavioral test on day 21 following colchidine injections i.e. on day 22. Animals were sacrificed by decapitation and the brains were removed and rinsed with ice-cold isotonic saline. Brain tissue samples were then homogenized with 10 times w v ; ice cold 0.1 M phosphate buffer pH 7.4 ; . The homogenate was centrifuged at 10, 000 g for 15 min and aliquots of supernatant was separated and used for biochemical estimation.
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Efforts should be advanced to implement that are making us sick the Persistent Organic Pollutants POPs ; and work with our allies treaty.370 This global to eliminate them." treaty, negotiated under the auspices of I Andrea Ravinett Martin, the United Nations Founder, Breast Cancer Fund Environment Program, targets hexachlorobenzene, endrin, mirex, toxaphene, chlordane, heptachlor, DDT, aldrin, dieldrin, PCBs, dioxins and furans. The agreement became legally-binding on May 17, 2004, when France became the 50th nation to ratify it. The first meeting of ratifying countries is to be held within a year from that date. Countries that ratify the treaty before the first meeting will be eligible to participate in discussions of how the treaty will be implemented and the process for deciding what additional POPs chemicals will be designated for elimination. Although the United States is a signatory, the U.S. Senate should now ratify this treaty and help lead the way in expanding the list of toxic chemicals to be phased out. The European Union EU ; , the world's secondlargest economy371 and largest chemical producer372 is taking major steps to ensure that all chemicals released into the environment in EU countries are not linked to serious health consequences. The new policy proposed by the EU is known as REACH.
J anal toxicol 1991; 1- 1 klintschar m, beham-schmidt c, radner h, et al colchicine poisoning by accidental ingestion of meadow saffron colchicum autumnale ; : pathological and medicolegal aspects and isordil and colchicine.
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Within five 5 ; working days upon completion of the investigation of an illicit drug laboratory, or dangerous drug environment, where children are found in imminent danger, all DEC team members will meet and debrief each other as to the case events and evidence found. This policy is established in order to successfully assess and improve the response of the DEC team. Furthermore, it is believed that this debriefing will assist DEC team members in identifying any problems that may have existed at the time of the search warrant or intervention, which could be improved upon in future cases. This debriefing process is imperative to establish and improve collaborative efforts between DEC team members and other disciplines involved. IX. PROSECUTION'S CASE MANAGEMENT AND HANDLING.
S. Zinner, M. Smirnova, I. Alferova, I. Lubenko, S. Vostrov, Y. Portnoy, A. Firsov Cambridge, USA; Moscow, RUS ; Objective: To compare the pharmacodynamics of daptomycin and vancomycin, killing kinetics of S. aureus were studied in five-day treatment courses over a wide range of ratios of the 24-h area under the curve AUC ; to MIC. Methods: A clinical isolate S. aureus 866 with MIC of daptomycin of 0.35 mg L and MIC of vancomycin of 0.7 mg L was exposed to once-daily daptomycin and twice-daily vancomycin for five consecutive days. Mono-exponential concentration-time profiles were simulated with half-lives of 9 h daptomycin ; and 6 h vancomycin ; over a 16-fold range of the AUC MIC ratio: from 16256 h. The antimicrobial effect was expressed by its intensity IEthe area between the control growth curve in the absence of antibiotics and the time-kill regrowth curve observed in the presence of antibiotic ; . The cumulative effect of each treatment was determined from time zero to the time the effect no longer could be detected, i.e. the time after the last antibiotic dose at which the number of antibiotic-exposed bacteria reached at least 9 LogCFU ml. This value was the cutoff level used to determine IE. Results: With both daptomycin and vancomycin, bacterial regrowth followed initial killing over the entire range of the simulated AUC MIC ratio. Anti-staphylococcal effects of the antibiotics depended on the AUC MICs: the higher the AUC MIC, the lower numbers of surviving organisms and the later the regrowth. The IE-log AUC MIC plots were linear and virtually superimposed for daptomycin and vancomycin. Based on the IE-AUC MIC relationship of the IE, the anti-staphylococcal effect of the proposed therapeutic dose of daptomycin 4 mg kg; AUC MIC 1100 h for S. aureus 866 ; is 20% greater than that of two 1-g doses of vancomycin given at a 12-h interval AUC MIC 570 h ; . Conclusion: These findings predict greater anti-staphylococcal efficacy of clinically achievable AUC MICs of daptomycin relative to vancomycin. and VAN that provide peak concentrations equal to the MIC, between the MIC and the mutant prevention concentration MPC ; , i.e., within the MSW, and above the MPC AUC MIC 16256 h ; . MPCs of DAP and VAN were 5.5 and 10.9 mg L, respectively. Changes in the susceptibility of S. aureus 10 to DAP or VAN were examined by repeated MIC determinations at each 24 h and in the end of treatment. To determine the resistance frequency f ; , the surviving organisms were counted by plating the specimens on agar containing 2 and 4 MIC of DAP or VAN. Results: Both in terms of susceptibility testing and the population analysis, selection of the resistant mutants occurred at DAP and VAN concentrations that fell into the MSW AUC MIC from 32 to 128 h ; but not at concentrations out of MSW AUC MIC 16 and 256 h ; . Bell-shape AUC MIC relationships of resistance of S. aureus 10 were similar to those observed with DAP- and VAN-exposed S. aureus 866 as well as with S. aureus exposed to fluoroquinolones. Based on these findings, an AUC MIC ratio that may protect from the selection of resistant mutants was predicted at 256 h for both DAP and VAN. For S. aureus 10, this protective value is less than AUC MIC provided by usual 4 mg kg dose of DAP 350 h ; but not by two 1-g doses of VAN 180 h ; . Conclusions: Clinically achievable concentrations DAP may be more effective than those of VAN in prevention of the selection of resistant S. aureus. Also, these findings support the MSW hypothesis.
FIGURE 2. Effect of 3 days of treatment with colchicine on plasma renin concentration PRC ; 30 minutes after isoproterenol stimulation. Values represent the mean SEM; * indicates significant difference from saline treatment; t indicates significant difference from isoproterenol treatment in control animals n 7.
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