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Experimental cell research low concentrations of primaquine inhibit degradation but not receptor - mediated endocytosis of asialoorosomucoid by hepg2 cells experimental cell research , volume 192, issue 2 , february 1991 , pages 581-586 john reif, alan schwartz and robert fallon abstract asialoorosomucoid asor ; is internalized and degraded by hepg2 cells after binding to the asialoglycoprotein asgp ; receptor, internalization through the coated pit coated vesicle pathway, and trafficking to lysosomes.
Aminopeptidase-catalysed hydrolysis Scheme 1 ; .15 18 The synthetic approaches for the preparation of imidazolidin-4ones involve the reaction of the peptide with an aldehyde or ketone followed by intramolecular cyclization. This reaction is catalysed by acids19 or bases20 although no catalyst is needed with acetone.21 Usually, peptide imidazolidin-4-one derivatives, 4, were quantitatively hydrolysed to the parent peptide in physiological conditions pH 7.4 buffer at 37 8C ; with half-lives ranging from in 1 to depending on the N-terminal dipeptide sequence and on the R3, R4 imidazolidinone substituents Scheme 1 ; .15 18 The same imidazolidin-4-one strategy was used to improve the bioavailability of ampicillin, a b-lactam that also contains a peptide backbone.22 The corresponding imidazolidin-4-one, hetacillin, is also rapidly hydrolysed to ampicillin in physiological conditions. Here we report the synthesis of compounds 5, incorporating the imidazolidin-4-one scaffold, as potential peptidasestable prodrugs of amino acid derivatives of primaquine, 3 Scheme 2 ; . As the primaquine starting material was a racemate, the cyclization reactions of 3 with ketones or aldehydes yielded compounds 5 as the corresponding diastereomeric mixtures. Reaction of 3 with 2-formylbenzoic acid leads to 1H-imidazo[2, 1-a]isoindole-2, 5 ; dione production, 6, via a diastereoselective cyclization Scheme 3 ; . 2. Results and discussion 2.1. Synthesis of N-a-aminoacylprimaquine derivatives The target imidazolidin-4-ones 5 were synthesised via the corresponding amino acid derivatives 3 Scheme 2 ; . The Boc-protected amino acid intermediates 7 were prepared using standard peptide coupling methods23 that involved Na-Boc protected amino acid BocAAOH ; coupling to ; primaquine PQ ; , using either dicyclohexylcarbodiimide.
Have been approved by the Thai FDA for the treatment of falciparum malaria in Thailand. These compounds are well tolerated; however, monotherapy for at least 5-7 days is required. Therefore, artemisinin derivatives should be used for the treatment of falciparum malaria in combination with long acting drugs. Artesunate has been used successfully for treatment of asexual forms of vivax malaria in combination with primaquine in Thailand Hamedi et al., 2004 ; . Artemisinin was less effective in Vietnam Phan et al., 2002 ; . Several ACTs are now available in co-formulated or in co-packaged presentations. Very few studies on the efficacy of ACTs for the treatment of vivax malaria are available so far. Efficacy of artesunate plus sulfadoxine-pyrimethamine in Indonesia was 89.5%, whereas dihydroartemisinin-piperaquine was 100% effective in Indonesia Tjitra et al., 2002 ; . In the present study, artemether-lumefantrine was as effective as chloroquine. However, parasite clearance time was shorter in artemether-lumefantrine treated group. Only one case of failure was reported at day 26. In an earlier study in Indonesia, treatment failures after chloroquine therapy between day 17 and day 28 may be either recrudescence or relapse Baird et al., 1997 ; . Unfortunately, no blood was sampled for lumefantrine dosage or molecular markers in the present study. Reinfection was excluded since patients were hospitalized during the follow-up. Many countries have adopted ACTs as the first line drugs for the treatment of uncomplicated falciparum malaria. The present study confirms that artemetherlumefantrine is effective against vivax malaria and well tolerated in combination with primaquine. These results have implication for countries that have adopted artemether-lumefantrine as the first line drug, and where both malaria species are prevalent and parasitological differentiation is not carried out in routine practices.
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TABLE 3. Effect of peptide-grafted liposomal primaquine on specific toxicity parametersa and primidone.
Abstract Background. Kidney hypertrophy is stimulated by both partial nephrectomy and NH4Cl administration. Also, parathyroidectomy PTX ; has been reported to prevent kidney hypertrophy induced by a high protein diet. Our goal was to determine in the azotaemic rat: i ; the combined effects of NH4Cl administration and dietary phosphorus on the development of kidney hypertrophy and calcium deposition in the kidney and ii ; whether the absence of parathyroid hormone PTH ; affected the development of kidney hypertrophy and calcium deposition. Methods. High HPD, 1.2% ; , normal NPD, 0.6% ; or low LPD, 0.05% ; phosphorus diets were given to 5 6 nephrectomized rats for 30 days. In each dietary group, one-half of the rats were given NH4Cl in the drinking water. The six groups of rats were: i ; HPD NH4Cl; ii ; HPD; iii ; NPD NH4Cl; iv ; NPD; v ; LPD NH4Cl and vi ; LPD. In a separate study, PTX was performed to determine whether PTH affected renal hypertrophy in 5 6 nephrectomized rats given NH4Cl. Results. Both with and without NH4Cl NH4Cl ; , kidney weight was greatest P 0.05 ; in the HPD groups. In each dietary phosphorus group, kidney weight was greater P 0.05 ; in the NH4Cl group. In both the NH4Cl groups, kidney calcium content was greatest P 0.05 ; in the HPD group, but was less P 0.05 ; in the NPD and HPD groups given NH4Cl. An inverse correlation was present between creatinine clearance and kidney calcium content r 0.51, P 0.001 ; . When factored for kidney weight, creatinine clearance was less P 0.05 ; in the HPD group in both the NH4Cl groups, but was greater in the HPD NH4Cl than in the HPD group. In PTX rats, kidney weight was greater P 0.05 ; and kidney.
That it has achieved an actual average annual production of at least three times the quantities specified against each item schedule in Schedule of Requirements during the last three years as specified in the above mentioned sub-para of this paragraph f ; . A certificate from the relevant state drug authority or a chartered accountant should be furnished in support. Average annual production Similar Product Description quantity in Lakhs of Tablets ; Product Primaquine Phosphate 2.5 mg base 4050.00 Tablets as per IP 96 Brown colour Tablets and probenecid.
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Early in 2006, we were pleased to bring the Novogyne sales force onboard as Noven employees. Previously, they had been part of a contract sales force. With an outstanding product in the hands of a proven team, we see another year of growth ahead in 2007 for Vivelle-Dot, and we are forecasting the ninth consecutive year of growth in the joint venture's profit contribution to Noven. HT Prescriptions In 2006 compared to 2005, prescriptions for Vivelle-Dot increased 6%, and prescriptions for Novogyne's products as a whole increased 3%. Prescriptions in the overall U.S. HT market were down 4% for the same period, so Vivelle-Dot outperformed the market by about 10 percentage points see Figure 4, page 7.
FROM THE CIRCUIT COURT OF FAIRFAX COUNTY Kathleen H. MacKay, Judge Donald E. Jeffrey III, Assistant Attorney General Robert F. McDonnell, Attorney General; Susan L. Parrish, Assistant Attorney General, on brief ; , for appellant. Peter D. Greenspun Christie A. Leary; Greenspun, Davis & Leary, P.C., on brief ; , for appellee and procainamide
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KAMTEKAR KD, GOGTAY NJ, DAS SS, KARNARD D, KADAM VS, DESAI SA, KSHIRSAGAR NA Department of Clinical Pharmacology and Medicine, Seth.G.S. Medical College and K.E.M Hospital, Parel, Mumbai-400 012. Objective: To assess the efficacy of single dose of 45 mg primaquine as a gametocytocidal agent in falciparum malaria in adults in Mumbai. Methods: Inclusion for the study was presence of gametocytes 55 l within the first 72 h. Patients were randomized to 4 groups. Group A uncomplicated falciparum malaria not treated with and procaine.
Of tissue ; 16, 30 ; . Of all tissues tested, lung tissue always contained the highest concentration of primaquine. Because the drug tends to concentrate in lung tissue, therapeutic efficacy may not be easily predicted by concentrations in serum. Part of the appeal of the clindamycin-primaquine combination is that both drugs are well-known clinical entities. Primaquine has been widely used in treatment and prophylaxis of malaria 32 ; . The drug is generally safe except for patients with glucose-6-phosphate dehydrogenase deficiency, who may suffer hemolytic anemia. Other hematological side effects are usually dose dependent. To our knowledge, primaquine has not been studied in AIDS patients. When used as an antibacterial agent, clindamycin is relatively nontoxic but can be associated with gastrointestinal symptoms requiring cessation of therapy. Clindamycin has been used to treat toxoplasmosis in mice 15 ; and in a very limited number of AIDS patients 20, 28 ; . No evidence of unpredicted or unusual side effects was noted, but the drug has not been systematically evaluated. Because clindamycin has been used safely in AIDS patients and because of the unusual efficacy of the combination of clindamycin with primaquine in our model system, we suggest cautious testing of clindamycin in appropriate combinations with primaquine in humans.
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The mean SD ; ratios of parasite counts at 48 h one cycle ; and 96 h two cycles ; to baseline counts in the rifampin group were 0.138 0.174 ; and 0.017 0.029 ; , respectively. These ratios were similar to those for patients treated with rifampin-primaquine, i.e., 0.161 0.05 ; at 48 h and 0.021 0.28 ; at 96 h. However, ratios for both groups were significantly higher than ratios for the group treated with chloroquine-primaquine, i.e., 0.021 0.053 ; at 48 h and clear by 96 h 0.001 ; . Thus, rifampin induced a .6-fold reduction in parasitemia per 48-h cycle compared with a 50-fold reduction induced by chloroquine. After completion of the 5-day rifampin treatment, four patients in the rifampin-only group had a rapid rise in parasitemia associated with another attack of fever. The other patient had fluctuating persistent parasitemia with another two attacks of fever but remained in good general condition Fig. 2 ; . All five patients developed high fevers associated with rising parasitemia, and all were treated subsequently with the standard chloroquine and primaquine regimen, beginning variously at 9, 12, and 30 hospital days. After these five cases had clearly failed therapy, further recruitment to the treatment group receiving rifampin alone was terminated. Patients who received the sequential rifampin and primaquine regimen had significantly longer parasite clearance times PCT50, PCT90, and PCr ; than those treated with chloroquine and primaquine P 0.053 to 0.001 ; Fig. 1 ; . The overall mean SD ; parasite clearance time for the rifampin-primaquine group PCr 171 [54] h ; was almost three times longer than for the group treated with chloroquine-primaquine 62 and procarbazine.
Suggest extreme caution on the part of transplantation centers will be necessary to assure good early outcomes for this practice. It is expected that the number of HIV-infected patients undergoing renal transplantation will increase substantially after the performance of multicenter collaborative clinical trials. The finding of white patients being overrepresented is consistent with non-HIVAN patients receiving transplants, i.e., those with diabetic nephropathy or another disease who became coinfected with HIV during the course of treatment, as outlined by Glassock et al. 40 ; early in the course of the epidemic. Undoubtedly, data in the future will show much more diffusion of transplantation to African Americans with HIVAN. However, given the success in this and previous studies, it may be time to apply kidney transplantation more widely to HIV-infected candidates.
Contraindicated in children 8 years of age. See recommended dosages in Table 14a, p. 117. ; Children who cannot take mefloquine or doxycycline can be given chloroquine with proguanil for travel to sub-Saharan Africa ; for prophylaxis. Mefloquine and chloroquine phosphate are manufactured in the United States in tablet form only and have a very bitter taste. Pediatric doses should be calculated carefully according to body weight. Pharmacists can pulverize tablets and prepare gelatin capsules with calculated pediatric doses. Mixing the powder in food or drink may facilitate the administration of antimalarial drugs to children. Chloroquine in suspension is widely available overseas. Parents should calculate the dose and volume to be administered based on body weight, because the concentration of chloroquine base varies in different suspensions. OVERDOSE OF ANTIMALARIAL DRUGS CAN BE FATAL. MEDICATION SHOULD BE STORED IN CHILDPROOF CONTAINERS OUT OF REACH OF CHILDREN. Prophylaxis During Pregnancy Malaria infection in pregnant women may be more severe than in nonpregnant women. Malaria may increase the risk of adverse pregnancy outcomes including prematurity, abortion, and stillbirth. For these reasons and because no chemoprophylactic regimen is completely effective, women who are pregnant or likely to become pregnant should avoid travel to areas with malaria transmission. Women traveling to areas where drug-resistant P. falciparum has not been reported may take chloroquine prophylaxis. Chloroquine has not been found to have any harmful effects on the fetus when used in the recommended doses for malaria prophylaxis; therefore, pregnancy is not a contraindication for malaria prophylaxis with chloroquine or hydroxychloroquine. A review of mefloquine use in pregnancy from clinical trials and reports of inadvertent use of mefloquine during pregnancy suggests that its use during the second and third trimester of pregnancy is not associated with adverse fetal or pregnancy outcome. Limited data suggest it is also safe during the first trimester. Consequently, mefloquine may be considered for use by health-care providers for prophylaxis in women who are pregnant or likely to become so, when exposure to chloroquine-resistant P. falciparum is unavoidable. Doxycycline is contraindicated for malaria prophylaxis during pregnancy and lactation. Adverse effects of tetracyclines on the fetus include discoloration and dysplasia of the teeth and inhibition of bone growth. During pregnancy, tetracyclines are indicated only to treat life-threatening infections due to multidrug-resistant P. falciparum. Proguanil has been widely used for several decades, and no adverse effects on pregnancy or the fetus have been established. Primaquine should not be used during pregnancy because the drug may be passed transplacentally to a G6PD-deficient fetus and cause hemolytic anemia in utero. Whenever radical cure or terminal prophylaxis with primaquine is indicated during pregnancy, chloroquine should be given once a week until delivery, at which time primaquine may be given and procrit.
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