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Smith PJ, Suri D. Adrenalectomy to treat reactivated chronic hepatitis B infection in a patient with a steroid-secreting adrenal tumour. BMJ Case Rep 2011; 2011:2011/jan18_1/bcr1120103508. [PMID: 22715258 DOI: 10.1136/bcr.11.2010.3508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
We present a case of reactivation of chronic hepatitis B virus (HBV) infection by a steroid-producing adrenal tumour. The tumour caused a reactivation and subsequent flare of the patients' HBV. The adrenal tumour was treated with an adrenalectomy and as a consequence the patients' transaminitis and viral load fell rapidly without the need for any additional hepatitis B treatment. The role of hepatitis B and steroid priming is discussed and the possible immunological mechanisms that underpin this phenomenon.
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Zishiri VK, Hunter R, Smith PJ, Taylor D, Summers R, Kirk K, Martin RE, Egan TJ. A series of structurally simple chloroquine chemosensitizing dibemethin derivatives that inhibit chloroquine transport by PfCRT. Eur J Med Chem 2011; 46:1729-42. [PMID: 21396749 DOI: 10.1016/j.ejmech.2011.02.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 02/06/2011] [Accepted: 02/13/2011] [Indexed: 11/28/2022]
Abstract
A series of 12 new dibemethin (N-benzyl-N-methyl-1-phenylmethanamine) derivatives bearing an N-aminomethyl group attached to the one phenyl ring and an H, Cl, OCH3 or N(CH3)2 group on the other have been synthesized. These compounds all showed strong chloroquine chemosensitizing activity, comparable to verapamil, when present at 1 μM in an in vitro culture of the chloroquine-resistant W2 strain of the human malaria parasite, Plasmodium falciparum. Their N-formylated derivatives also exhibited resistance-reversing activity, but only at substantially higher IC10 concentrations. A number of the dibemethin derivatives were shown to inhibit chloroquine transport via the parasite's 'chloroquine resistance transporter' (PfCRT) in a Xenopus laevis oocyte expression system. The reduced resistance-reversing activity of the formylated compounds relative to their free amine counterparts can probably be ascribed to two factors: decreased accumulation of the formylated dibemethins within the parasite's internal digestive vacuole (believed to be the site of action of chloroquine), and a reduced ability to inhibit PfCRT. The resistance-reversing activity of the compounds described here demonstrates that the amino group need not be attached to the two aromatic rings via a three or four carbon chain as has been suggested by previous QSAR studies. These compounds may be useful as potential side chains for attaching to a 4,7-dichloroquinoline group in order to generate new resistance-reversing chloroquine analogues with inherent antimalarial activity.
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Aurich M, Bedi HS, Smith PJ, Rolauffs B, Mückley T, Clayton J, Blackney M. Arthroscopic treatment of osteochondral lesions of the ankle with matrix-associated chondrocyte implantation: early clinical and magnetic resonance imaging results. Am J Sports Med 2011. [PMID: 21068444 DOI: 10.1177/036354651038157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
BACKGROUND Conventional autologous chondrocyte transplantation in the ankle often requires tibial or fibular osteotomies with potential morbidity for the patient. Advances in biotechnology and surgical techniques have resulted in the development of matrix-associated chondrocyte implantation (MACI). As the chondrocyte-loaded scaffold can be applied arthroscopically, this procedure is especially useful for the treatment of osteochondral defects in the ankle. HYPOTHESIS Arthroscopic MACI is a safe procedure in the ankle with good clinical and magnetic resonance imaging results. STUDY DESIGN Case series; Level of evidence, 4. METHODS The authors reviewed all patients (n = 18) who had arthroscopic MACI for osteochondral lesions of the ankle (n = 19) between February 2006 and May 2008 clinically and with magnetic resonance imaging. The pain and disability module of the Foot Function Index (FFI), the American Orthopaedic Foot & Ankle Society (AOFAS) clinical rating system, the Core Scale of the Foot and Ankle Module of the American Academy of Orthopaedic Surgeons (AAOS) Lower Limb Outcomes Assessment Instruments, and the Magnetic Resonance Observation of Cartilage Repair Tissue (MOCART) score were used. The clinical results up to 3 years after MACI (mean follow-up, 24.5 months) were compared with preoperative data for 14 cases and the magnetic resonance imaging data for all 19. RESULTS A significant improvement (50.3% ± 13.2%) in all clinical scores was noted (FFI pain before MACI: 5.5 ± 2.0, after MACI: 2.8 ± 2.2; FFI disability before MACI: 5.0 ± 2.3, after MACI: 2.6 ± 2.2; AOFAS before MACI: 58.6 ± 16.1, after MACI: 80.4 ± 14.1; AAOS standardized mean before MACI: 59.9 ± 16.0, after MACI: 83.5 ± 13.2; AAOS normative score before MACI: 23.0 ± 13.0, after MACI: 42.2 ± 10.7). According to the AOFAS Hindfoot score, 64% were rated as excellent and good, whereas 36% were rated fair and poor. The results correlated with the age of the patient and the duration of symptoms, but not with the size of the lesion. Sixteen patients (89%) reported regular sports activities before the onset of symptoms; 13 of them (81%) returned to sports after the MACI, 56% (n = 9) to the same level. The mean MOCART score was 62.4 ± 15.8 points. In general, there was no relation between MOCART score and clinical outcome, although the filling of the defect showed some correlation with the AAOS score. CONCLUSION Arthroscopic MACI is a safe procedure for the treatment of osteochondral lesions in the ankle with overall good clinical and magnetic resonance imaging results.
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D’hooghe M, Kenis S, Vervisch K, Lategan C, Smith PJ, Chibale K, De Kimpe N. Synthesis of 2-(aminomethyl)aziridines and their microwave-assisted ring opening to 1,2,3-triaminopropanes as novel antimalarial pharmacophores. Eur J Med Chem 2011; 46:579-87. [DOI: 10.1016/j.ejmech.2010.11.037] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 10/15/2010] [Accepted: 11/24/2010] [Indexed: 10/18/2022]
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Aurich M, Bedi HS, Smith PJ, Rolauffs B, Mückley T, Clayton J, Blackney M. Arthroscopic treatment of osteochondral lesions of the ankle with matrix-associated chondrocyte implantation: early clinical and magnetic resonance imaging results. Am J Sports Med 2011; 39:311-9. [PMID: 21068444 DOI: 10.1177/0363546510381575] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Conventional autologous chondrocyte transplantation in the ankle often requires tibial or fibular osteotomies with potential morbidity for the patient. Advances in biotechnology and surgical techniques have resulted in the development of matrix-associated chondrocyte implantation (MACI). As the chondrocyte-loaded scaffold can be applied arthroscopically, this procedure is especially useful for the treatment of osteochondral defects in the ankle. HYPOTHESIS Arthroscopic MACI is a safe procedure in the ankle with good clinical and magnetic resonance imaging results. STUDY DESIGN Case series; Level of evidence, 4. METHODS The authors reviewed all patients (n = 18) who had arthroscopic MACI for osteochondral lesions of the ankle (n = 19) between February 2006 and May 2008 clinically and with magnetic resonance imaging. The pain and disability module of the Foot Function Index (FFI), the American Orthopaedic Foot & Ankle Society (AOFAS) clinical rating system, the Core Scale of the Foot and Ankle Module of the American Academy of Orthopaedic Surgeons (AAOS) Lower Limb Outcomes Assessment Instruments, and the Magnetic Resonance Observation of Cartilage Repair Tissue (MOCART) score were used. The clinical results up to 3 years after MACI (mean follow-up, 24.5 months) were compared with preoperative data for 14 cases and the magnetic resonance imaging data for all 19. RESULTS A significant improvement (50.3% ± 13.2%) in all clinical scores was noted (FFI pain before MACI: 5.5 ± 2.0, after MACI: 2.8 ± 2.2; FFI disability before MACI: 5.0 ± 2.3, after MACI: 2.6 ± 2.2; AOFAS before MACI: 58.6 ± 16.1, after MACI: 80.4 ± 14.1; AAOS standardized mean before MACI: 59.9 ± 16.0, after MACI: 83.5 ± 13.2; AAOS normative score before MACI: 23.0 ± 13.0, after MACI: 42.2 ± 10.7). According to the AOFAS Hindfoot score, 64% were rated as excellent and good, whereas 36% were rated fair and poor. The results correlated with the age of the patient and the duration of symptoms, but not with the size of the lesion. Sixteen patients (89%) reported regular sports activities before the onset of symptoms; 13 of them (81%) returned to sports after the MACI, 56% (n = 9) to the same level. The mean MOCART score was 62.4 ± 15.8 points. In general, there was no relation between MOCART score and clinical outcome, although the filling of the defect showed some correlation with the AAOS score. CONCLUSION Arthroscopic MACI is a safe procedure for the treatment of osteochondral lesions in the ankle with overall good clinical and magnetic resonance imaging results.
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Smith PJ, Steinke D, McMillan P, Stewart A, Ward RD. DNA barcoding of morid cods reveals deep divergence in the antitropical Halargyreus johnsoni but little distinction between Antimora rostrata and Antimora microlepis. ACTA ACUST UNITED AC 2011; 22 Suppl 1:21-6. [PMID: 21271848 DOI: 10.3109/19401736.2010.532329] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND AND AIMS DNA barcoding strongly suggests that specimens of the slender codling (Halargyreus johnsonii) from New Zealand and Tasmania belong to a different species to H. johnsonii reported from other areas. RESULTS Sequence divergence between the two groups averaged 3.95%, much higher than within-group divergences of 0.03 and 0.02% for specimens, respectively, from New Zealand-Tasmania and from the North Pacific, Atlantic Ocean, and Southern Ocean. CONCLUSION Meristic data for specimens from New Zealand and from the Southern Ocean north of the Ross Sea support the conclusion of two species. DNA barcodes for two sister taxa, Antimora rostrata and Antimora microlepis, show low intra-species (0.3-0.06%) and inter-species (0.23%) divergence.
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Fisk NM, Wesselingh SL, Beilby JJ, Glasgow NJ, Puddey IB, Robinson BG, Angus JA, Smith PJ. Academic health science centres in Australia: let's get competitive. Med J Aust 2011; 194:59-60. [DOI: 10.5694/j.1326-5377.2011.tb04165.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Graziose R, Rathinasabapathy T, Lategan C, Poulev A, Smith PJ, Grace M, Lila MA, Raskin I. Antiplasmodial activity of aporphine alkaloids and sesquiterpene lactones from Liriodendron tulipifera L. JOURNAL OF ETHNOPHARMACOLOGY 2011; 133:26-30. [PMID: 20826204 PMCID: PMC3010440 DOI: 10.1016/j.jep.2010.08.059] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 08/27/2010] [Accepted: 08/27/2010] [Indexed: 05/18/2023]
Abstract
AIM OF THE STUDY The objective of this study was to isolate and characterize the active constituents of the traditionally used antimalarial plant Liriodendron tulipifera by antiplasmodial-assay guided fractionation. MATERIALS AND METHODS Bark and leaves were extracted with solvents of increasing polarity. Fractions were generated using flash chromatography, counter current chromatography and preparative HPLC and subjected to in vitro antiplasmodial and cytotoxicity assays. Active fractions were subjected to further fractionation until pure compounds were isolated, for which the IC(50) values were calculated. RESULTS AND DISCUSSION Six known aporphine alkaloids, asimilobine (1), norushinsunine (2), norglaucine (3), liriodenine (4), anonaine (5) and oxoglaucine (6) were found to be responsible for the antiplasmodial activity of the bark. Leaves yielded two known sesquiterpene lactones, peroxyferolide (7) and lipiferolide (8) with antiplasmodial activity. The antiplasmodial activity of (2) (IC(50)=29.6 μg/mL), (3) (IC(50)=22.0 μg/mL), (6) (IC(50)=9.1 μg/mL), (7) (IC(50)=6.2 μg/mL) and (8) (IC(50)=1.8 μg/mL) are reported for the first time. CONCLUSION This work supports the historical use of Liriodendron tulipifera as an antimalarial remedy of the United States and characterizes its antiplasmodial constituents.
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Smith PJ, Steinke D, McMillan PJ, Stewart AL, McVeagh SM, Diaz de Astarloa JM, Welsford D, Ward RD. DNA barcoding highlights a cryptic species of grenadier Macrourus in the Southern Ocean. JOURNAL OF FISH BIOLOGY 2011; 78:355-365. [PMID: 21235567 DOI: 10.1111/j.1095-8649.2010.02846.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Although three species of the genus Macrourus are recognized in the Southern Ocean, DNA sequencing of the mitochondrial COI gene revealed four well-supported clades. These barcode data suggest the presence of an undescribed species, a conclusion supported by meristic and morphometric examination of specimens.
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Smith PJ. A veterinary surgeons' standards scheme? Vet Rec 2011; 168:28. [DOI: 10.1136/vr.c7419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Grace MH, Lategan C, Mbeunkui F, Graziose R, Smith PJ, Raskin I, Lila MA. Antiplasmodial and Cytotoxic Activities of Drimane Sesquiterpenes from Canella winterana. Nat Prod Commun 2010. [DOI: 10.1177/1934578x1000501205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The hexane extract from the leaves of Canella winterana exhibited strong activity against the chloroquine sensitive (CQS) strain of Plasmodium falciparum (D10) in vitro (IC50 2.53 μg/mL). Bioassay guided fractionation of this extract has led to the isolation of 5 drimane-type sesquiterpenoids: 9-epideoxymuzigadial, 9-deoxymuzigadial, muzigadial, 3-β-acetoxypolygodial and the newly isolated hemiacetal, named muzigodiol, with IC50-values of 1.01, 2.19, 0.31, 2.77 and 7.43 μg/mL, respectively. The first four compounds were tested for their cytotoxicity using Chinese Hamster Ovarian (CHO) cells, where they showed IC50-values of 1.82, 33.69, 1.18, and 58.31 μg/mL, respectively. A structure-activity relationship is discussed.
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Lombard MC, N’Da DD, Breytenbach JC, Smith PJ, Lategan CA. Artemisinin–quinoline hybrid-dimers: Synthesis and in vitro antiplasmodial activity. Bioorg Med Chem Lett 2010; 20:6975-7. [DOI: 10.1016/j.bmcl.2010.09.130] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 09/23/2010] [Accepted: 09/24/2010] [Indexed: 10/19/2022]
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Grace MH, Lategan C, Mbeunkui F, Graziose R, Smith PJ, Raskin I, Lila MA. Antiplasmodial and cytotoxic activities of drimane sesquiterpenes from Canella winterana. Nat Prod Commun 2010; 5:1869-1872. [PMID: 21299109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
The hexane extract from the leaves of Canella winterana exhibited strong activity against the chloroquine sensitive (CQS) strain of Plasmodium falciparum (D10) in vitro (IC50 2.53 microg/mL). Bioassay guided fractionation of this extract has led to the isolation of 5 drimane-type sesquiterpenoids: 9-epideoxymuzigadial, 9-deoxymuzigadial, muzigadial, 3-beta-acetoxypolygodial and the newly isolated hemiacetal, named muzigodiol, with IC50-values of 1.01, 2.19, 0.31, 2.77 and 7.43 microg/mL, respectively. The first four compounds were tested for their cytotoxicity using Chinese Hamster Ovarian (CHO) cells, where they showed IC50-values of 1.82, 33.69, 1.18, and 58.31 microg/mL, respectively. A structure-activity relationship is discussed.
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Guantai EM, Ncokazi K, Egan TJ, Gut J, Rosenthal PJ, Smith PJ, Chibale K. Design, synthesis and in vitro antimalarial evaluation of triazole-linked chalcone and dienone hybrid compounds. Bioorg Med Chem 2010; 18:8243-56. [PMID: 21044845 DOI: 10.1016/j.bmc.2010.10.009] [Citation(s) in RCA: 143] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2010] [Revised: 09/27/2010] [Accepted: 10/05/2010] [Indexed: 11/28/2022]
Abstract
A targeted series of chalcone and dienone hybrid compounds containing aminoquinoline and nucleoside templates was synthesized and evaluated for in vitro antimalarial activity. The Cu(I)-catalyzed cycloaddition of azides and terminal alkynes was applied as the hybridization strategy. Several chalcone-chloroquinoline hybrid compounds were found to be notably active, with compound 8b the most active, exhibiting submicromolar IC(50) values against the D10, Dd2 and W2 strains of Plasmodium falciparum.
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Webb RY, Smith PJ, Firag A. On the Probability of Improved Accuracy With Increased Sample Size. AM STAT 2010. [DOI: 10.1198/tast.2010.09204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sinxadi PZ, van der Walt JS, McIlleron HM, Badri M, Smith PJ, Dave JA, Levitt NS, Maartens G. Lack of association between stavudine exposure and lipoatrophy, dysglycaemia, hyperlactataemia and hypertriglyceridaemia: a prospective cross sectional study. AIDS Res Ther 2010; 7:23. [PMID: 20630064 PMCID: PMC2914641 DOI: 10.1186/1742-6405-7-23] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Accepted: 07/14/2010] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Stavudine continues to be widely used in resource poor settings despite its toxicity. Our objective was to determine association between plasma stavudine concentrations and lipoatrophy, concentrations of glucose, lactate and triglycerides. METHODS Participants were enrolled in a cross-sectional study with lipoatrophy assessment, oral glucose tolerance test, fasting triglycerides, finger prick lactate, and stavudine concentrations. Individual predictions of the area under the concentration curve (AUC) were obtained using a population pharmacokinetic approach. Logistic regression models were fitted to assess the association between stavudine geometric mean ratio > 1 and impaired fasting glucose, impaired glucose tolerance, hyperlactataemia, hypertriglyceridaemia, and lipoatrophy. RESULTS There were 47 study participants with a median age of 34 years and 83% were women. The median body mass index and waist:hip ratio was 24.5 kg/m2 and 0.85 respectively. The median duration on stavudine treatment was 14.5 months. The prevalence of lipoatrophy, impaired fasting glucose, impaired glucose tolerance, hyperlactataemia, and hypertriglyceridaemia were 34%, 19%, 4%, 32%, and 23% respectively. Estimated median (interquartile range) stavudine AUC was 2191 (1957 to 2712) ng*h/mL. Twenty two participants had stavudine geometric mean ratio >1. Univariate logistic regression analysis showed no association between stavudine geometric mean ratio >1 and impaired fasting glucose (odds ratio (OR) 2.00, 95% CI 0.44 to 9.19), impaired glucose tolerance (OR 1.14, 95% CI 0.07 to 19.42), hyperlactataemia (OR 2.19, 95%CI 0.63 to 7.66), hypertriglyceridaemia (OR 1.75, 95%CI 0.44 to 7.04), and lipoatrophy (OR 0.83, 95% CI 0.25 to 2.79). CONCLUSIONS There was a high prevalence of metabolic complications of stavudine, but these were not associated with plasma stavudine concentrations. Until there is universal access to safer antiretroviral drugs, there is a need for further studies examining the pathogenesis of stavudine-associated toxicities.
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Chellan P, Shunmoogam-Gounden N, Hendricks DT, Gut J, Rosenthal PJ, Lategan C, Smith PJ, Chibale K, Smith GS. Synthesis, Structure and in Vitro Biological Screening of Palladium(II) Complexes of Functionalised Salicylaldimine Thiosemicarbazones as Antimalarial and Anticancer Agents. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000317] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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143
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Bose A, Smith PJ, Lategan CA, Gupta JK, Si S. Studies on in vitro antiplasmodial activity of Cleome rutidosperma. ACTA POLONIAE PHARMACEUTICA 2010; 67:315-318. [PMID: 20524435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Lang CW, Smith PJ, Ross LF. Ethics and professionalism in the pediatric curriculum: a survey of pediatric program directors. Pediatrics 2009; 124:1143-51. [PMID: 19752081 DOI: 10.1542/peds.2009-0658] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE Since 1982, pediatric residency programs have been asked to evaluate trainees for ethical behavior. In 2007, the Accreditation Council for Graduate Medical Education required documenting teaching and evaluation of professionalism. Pediatric residency program directors were surveyed to ascertain what they know about the content and process of their ethics and professionalism curricula. METHODS From February to May 2008, 394 program directors from the Association of Pediatric Program Directors were surveyed. RESULTS Of 386 eligible survey respondents, 233 (60%) returned partial or complete surveys. Programs were evenly divided on whether ethics was taught as an organized curriculum or integrated. Professionalism was combined with the ethics curriculum in 27% of programs and taught independently in 38% of programs, but 35% had no professionalism curriculum. More than one third of the respondents did not answer each content and structure question. Approximately two thirds of those who responded stated that their program dedicated <10 hours per year to ethics and professionalism, respectively. Nearly three fourth of programs identified crowding of the curriculum and one third identified lack of faculty expertise as curricular constraints. Respondents expressed interest in more curricular materials from the American Board of Pediatrics or Association of Pediatric Program Directors. CONCLUSIONS Despite requirements to train and evaluate residents in ethics and professionalism, there is a lack of structured curriculum, faculty expertise, and evaluation methodology. Effectiveness of training curricula and evaluation tools need to be assessed if the Accreditation Council for Graduate Medical Education requirements for competencies in these areas are to be meaningfully realized.
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Smith PJ, McVeagh SM, Hulston D, Anderson SA, Gublin Y. DNA identification of ciliates associated with disease outbreaks in a New Zealand marine fish hatchery. DISEASES OF AQUATIC ORGANISMS 2009; 86:163-167. [PMID: 19902845 DOI: 10.3354/dao02113] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ciliates associated with fish mortalities in a New Zealand hatchery were identified by DNA sequencing of the small subunit ribosomal RNA gene (SSU rRNA). Tissue samples were taken from lesions and gill tissues on freshly dead juvenile groper, brain tissue from adult kingfish, and from ciliate cultures and rotifers derived from fish mortality events between January 2007 and March 2009. Different mortality events were characterized by either of 2 ciliate species, Uronema marinum and Miamiensis avidus. A third ciliate, Mesanophrys carcini, was identified in rotifers used as food for fish larvae. Sequencing part of the SSU rRNA provided a rapid tool for the identification and monitoring of scuticociliates in the hatchery and allowed the first identification of these species in farmed fish in New Zealand.
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Brewer KC, Robinton S, Doherty CM, Kadambi VJ, Silverman L, Alden CL, Smith PJ. Oxytocin, vasopressin, and QT prolongation: Determination of an unknown mechanism of action. J Pharmacol Toxicol Methods 2009. [DOI: 10.1016/j.vascn.2009.04.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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147
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Anderson SA, Hulston DA, McVeagh SM, Webb VL, Smith PJ. In vitro culture and cryopreservation of Uronema marinum isolated from farmed New Zealand groper (Polyprion oxygeneios). J Microbiol Methods 2009; 79:62-6. [PMID: 19664663 DOI: 10.1016/j.mimet.2009.07.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 07/24/2009] [Accepted: 07/28/2009] [Indexed: 11/30/2022]
Abstract
An in vitro culture method was developed for the ciliated protozoa Uronema marinum isolated from New Zealand aquacultured groper (Polyprion oxygeneios). Both formulated media and sterile seawater supplemented with homogenised fish tissue as a food source supported growth of U. marinum achieving cell densities of up to 1 x 10(5)cells/mL in culture. A cryopreservation method based on a cryomix formula of 20% glycerol, 10% fetal bovine serum and 70% cultured U. marinum, incorporating a slow freeze method to -80 degrees C, then liquid nitrogen storage, allowed cryogenic storage of cells and successful re-culture up to 12 months in storage.
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Smith PJ, Sykes HR. Simultaneous Measurement of Cell Cycle Phase Position and Ionizing Radiation-induced DNA Strand Breakage in Single Human Tumour Cells Using Laser Scanning Confocal Imaging. Int J Radiat Biol 2009; 61:553-60. [PMID: 1349338 DOI: 10.1080/09553009214551331] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Techniques for the assessment of DNA damage and repair in individual cells are pertinent to several areas of research, in particular the study of the heterogeneity of tumour cell populations in response to anticancer agents. We describe an adaptation of an in situ alkaline denaturation assay performed on individual nuclei of lysed cells, termed nucleoids, trapped within an agarose film. A novel aspect of the technique described in the application of confocal laser scanning fluorescence microscopy for the measurement of nucleoid relaxation in response to DNA damage. The volumes of spherical nucleoids and their relative DNA contents were determined by ethidium bromide staining and the analysis of confocal sections through the equatorial planes of the nucleoids. Mean nucleoid volume increased as a linear function of X-ray dose (0.5-8 Gy) administered to intact cells prior to lysis. We provide evidence of heterogeneity, in asynchronous cultures, in the DNA unfolding/unwinding characteristics of cells irrespective of cell cycle age. Bivariate plots of relative DNA content versus nucleoid volume allowed the direct assessment of cellular repair capacity with respect to cell cycle position.
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Zhang GP, Xiao ZY, Rafique J, Arfan M, Smith PJ, Lategan CA, Hu LH. Antiplasmodial isoflavanones from the roots of Sophora mollis. JOURNAL OF NATURAL PRODUCTS 2009; 72:1265-1268. [PMID: 19572738 DOI: 10.1021/np900144c] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Six new prenylated isoflavanones named sophoronols A-F (1-6), together with eight phenolic constituents, were isolated from the roots of Sophora mollis. Their structures and stereochemistry were established by 1D and 2D NMR techniques, especially HMBC and NOESY as well as CD results. Componds 3 and 5 exhibited moderate anitplasmodial activity against the CQS D10 strain of Plasmodium falciparum, with IC(50) values of 12.9 and 12.8 microM, respectively.
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D’hooghe M, Dekeukeleire S, Mollet K, Lategan C, Smith PJ, Chibale K, De Kimpe N. Synthesis of Novel 2-Alkoxy-3-amino-3-arylpropan-1-ols and 5-Alkoxy-4-aryl-1,3-oxazinanes with Antimalarial Activity. J Med Chem 2009; 52:4058-62. [DOI: 10.1021/jm9002632] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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