1
|
Cantwell C, Gibney R, Wray A, Osborn M, Wiechmann W, Saadat S, Allen A, Toohey S. 347 Sex Evaluation and Numeric Distribution in Emergency Medicine Residencies. Ann Emerg Med 2020. [DOI: 10.1016/j.annemergmed.2020.09.362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
2
|
Kim MY, Sikkel MB, Hunter R, Haywood G, Tomlinson D, Furniss G, Panagopoulos D, Tayebjee M, Begg G, Ali R, Cantwell C, Gonna H, Sandler B, Lim ZL, Lim PB, Peters NS, Linton N, Kanagaratnam P. 53Generation of the first functional map of left atrial ganglionated plexus sites that induce AV nodal bradycardia. Europace 2017. [DOI: 10.1093/europace/eux283.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
3
|
Taylor R, Sohaib S, Gamble J, Qureshi N, Chu G, Chubb H, Umar F, Stegemann B, Leyva F, Wright I, Lim E, Koawing M, Lim P, Moore P, Linton N, Lefroy D, Davies D, Peters N, Kanagaratnam P, Francis D, Whinnett Z, Khiani R, Herring N, Foley P, Ginks M, Rajappan K, Bashir Y, Betts T, Kim S, Cantwell C, Ali R, Roney C, Shun-Shin M, Ng F, Wright I, Lim E, Lefroy D, Whinnett Z, Linton N, Kanagaratnam P, Peters N, Lim P, Li X, Vanheusden F, Almeida T, Salinet J, Dastagir N, Varanasi S, Chin S, Siddiqui S, Man S, Stafford P, Sandilands A, Schlindwein F, Ng G, Harrison J, Williams S, Whitaker J, Weiss S, Krueger S, Stenzel G, Schaeffter T, Razavi R, O'Neill M. Young Investigators Competition1Left ventricular lead position, mechanical activation and myocardial scar in relation to the clinical outcome of cardiac resynchronisation therapy: the role of feature-tracking and contrast-enhanced cardiovascular magnetic resonance2Does the haemodynamic improvement of biventricular pacing truly arise from cardiac resynchronisation? quantifying the contribution of av and vv adjustment3Differential relationship of electrical delay with endocardial and epicardial left ventricular leads for cardiac resynchronisation therapy4Characterisation of the persistent af substrate through the assessment of electrophysiologic parameters in the organised vs. disorganised rhythm5Targeting cyclical highest dominant frequency in the ablation of persistent atrial fibrillation6Feasibility of fully mr-guided ablation with active tracking: from pre-clinical to clinical application. Europace 2015. [DOI: 10.1093/europace/euv324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
4
|
Milkins C, Berryman J, Cantwell C, Elliott C, Haggas R, Jones J, Rowley M, Williams M, Win N. Guidelines for pre-transfusion compatibility procedures in blood transfusion laboratories. Transfus Med 2012; 23:3-35. [DOI: 10.1111/j.1365-3148.2012.01199.x] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 09/21/2012] [Accepted: 09/27/2012] [Indexed: 11/27/2022]
Affiliation(s)
| | - C. Milkins
- UK NEQAS (BTLP); West Herts Hospitals NHS Trust; Watford; UK
| | - J. Berryman
- Department of Blood Transfusion; University College London Hospitals, NHS Foundation Trust; London; UK
| | - C. Cantwell
- Department of Blood Transfusion; Imperial College Healthcare NHS Trust; London; UK
| | - C. Elliott
- Department of Blood Transfusion; South Tees Healthcare Trust; Middlesborough; UK
| | - R. Haggas
- Department of Blood Transfusion; Leeds teaching Hospital NHS Trust; Leeds; UK
| | - J. Jones
- Welsh Blood Service; Cardiff; UK
| | | | | | - N. Win
- Tooting Centre; NHSBT; Tooting; UK
| |
Collapse
|
5
|
DeBate RD, Cragun D, Gallentine AA, Severson HH, Shaw T, Cantwell C, Christiansen S, Koerber A, Hendricson W, Tomar SL, McCormack Brown K, Tedesco LA. Evaluate, assess, treat: development and evaluation of the EAT framework to increase effective communication regarding sensitive oral-systemic health issues. Eur J Dent Educ 2012; 16:232-8. [PMID: 23050505 PMCID: PMC3471784 DOI: 10.1111/j.1600-0579.2012.00747.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Oral healthcare providers are likely to encounter a number of sensitive oral/systemic health issues whilst interacting with patients. The purpose of the current study was to develop and evaluate a framework aimed at oral healthcare providers to engage in active secondary prevention of eating disorders (i.e. early detection of oral manifestations of disordered eating behaviours, patient approach and communication, patient-specific oral treatment, and referral to care) for patients presenting with signs of disordered eating behaviours. The EAT Framework was developed based on the Brief Motivational Interviewing (B-MI) conceptual framework and comprises three continuous steps: Evaluating, Assessing, and Treating. Using a group-randomized control design, 11 dental hygiene (DH) and seven dental (D) classes from eight institutions were randomized to either the intervention or control conditions. Both groups completed pre- and post-intervention assessments. Hierarchical linear models were conducted to measure the effects of the intervention whilst controlling for baseline levels. Statistically significant improvements from pre- to post-intervention were observed in the Intervention group compared with the Control group on knowledge of eating disorders and oral findings, skills-based knowledge, and self-efficacy (all P < 0.01). Effect sizes ranged from 0.57 to 0.95. No statistically significant differences in outcomes were observed by type of student. Although the EAT Framework was developed as part of a larger study on secondary prevention of eating disorders, the procedures and skills presented can be applied to other sensitive oral/systemic health issues. Because the EAT Framework was developed by translating B-MI principles and procedures, the framework can be easily adopted as a non-confrontational method for patient communication.
Collapse
Affiliation(s)
- R D DeBate
- Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, FL 33612, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Sherafati M, Metcalfe M, Cantwell C, Gibbs R. Blood transfusion product requirements and wastage in thoracoabdominal aneurysm repair. Int J Surg 2011. [DOI: 10.1016/j.ijsu.2011.07.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
7
|
Abstract
This study was undertaken to qualitatively and quantitatively compare fast MRI of hips with and without parallel imaging using SENSE (sensitivity encoding). 27 patients underwent MRI of the hips with coronal T1 turbo spin echo (TSE) (repetition time (TR) 500 ms, effective echo time (TEeff) 15 ms, Turbo Factor 4), coronal IR-TSE (TR 2000 ms, TEeff 30 ms, inversion time (TI) 160 ms, Turbo Factor 20) and axial T2 TSE (TR 3000 ms, TEeff 80 ms, Turbo Factor 20) weighted images acquired with and without SENSE with a reduction factor of 2. Conventional imaging was performed in 8 min and 36 s. Images acquired with SENSE were acquired in 5 min and 31 s without a discernible reduction in image quality or a significant quantitative reduction in image signal to noise ratio, contrast to noise ratio or edge enhancement.
Collapse
Affiliation(s)
- M Ryan
- Cappagh National Orthopaedic Hospital, Finglas, Dublin 11, Ireland
| | | | | | | | | |
Collapse
|
8
|
Cantwell C, Ryan M, O'Connell M, Cunningham P, Brennan D, Costigan D, Lynch T, Eustace S. A comparison of inflammatory myopathies at whole-body turbo STIR MRI. Clin Radiol 2005; 60:261-7. [PMID: 15664582 DOI: 10.1016/j.crad.2004.06.027] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- C Cantwell
- Cappagh National Orthopaedic Hospital, Finglas, Dublin, Eire
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Abstract
OBJECTIVES The aim was to measure changes in walking patterns and self rated fatigue in people with multiple sclerosis (MS) compared with age matched control subjects, from the morning to the afternoon within a single day. METHODS Fourteen patients with MS and the same number of matched control subjects performed four 10 m gait trials at their preferred walking speed at 10 00 am and then again at 3 00 pm on the same day. Gait speed, stride length, cadence, and the percentage of the gait cycle spent in double limb support were measured using a foot switch stride analyzer. Patients with MS also self rated their fatigue levels in the morning and afternoon using an 11 point scale. RESULTS Compared with control subjects, patients walked very slowly, with reduced stride length and around twice as much variability in gait performance. Although self rated fatigue significantly increased from the morning to the afternoon, walking patterns remained consistent in both groups over the course of the day. CONCLUSIONS These findings imply that mechanisms controlling locomotion are separate from those regulating perceived fatigue. Objective measures of performance, rather than self report, should be used to monitor change in patients with multiple sclerosis.
Collapse
Affiliation(s)
- M E Morris
- School of Physiotherapy, La Trobe University, Bundoora, 3086, Australia.
| | | | | | | |
Collapse
|
10
|
Rotheram-Borus MJ, Piacentini J, Cantwell C, Belin TR, Song J. The 18-month impact of an emergency room intervention for adolescent female suicide attempters. J Consult Clin Psychol 2001. [PMID: 11142542 DOI: 10.1037//0022-006x.68.6.1081] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Following a suicide attempt by female adolescents, the impact of a specialized emergency room (ER) care intervention was evaluated over the subsequent 18 months. Using a quasi-experimental design, this study assigned 140 female adolescent suicide attempters (SA), ages 12-18 years, and their mothers (88% Hispanic) to receive during their ER visit either: (a) specialized ER care aimed at enhancing adherence to outpatient therapy by providing a soap opera video regarding suicidality, a family therapy session, and staff training; or (b) standard ER care. The adjustment of the SA and their mothers was evaluated over 18 months (follow-up, 92%) using linear mixed model regression analyses. SA's adjustment improved over time on most mental health indices. Rates of suicide reattempts (12.4%) and suicidal reideation (29.8%) were lower than anticipated and similar across ER conditions. The specialized ER care condition was associated with significantly lower depression scores by the SA and lower maternal ratings on family cohesion. Significant interactions of intervention condition with the SA's initial level of psychiatric symptomatology indicated that the intervention's impact was greatest on maternal emotional distress and family cohesion among SA who were highly symptomatic. SA's attendance at therapy sessions following the ER visit was significantly associated with only one outcome--family adaptability. Specialized ER interventions may have substantial and sustained impact over time, particularly for the parents of youth with high psychiatric symptomatology.
Collapse
Affiliation(s)
- M J Rotheram-Borus
- Department of Psychiatry, University of California, Los Angeles 90024, USA.
| | | | | | | | | |
Collapse
|
11
|
Rotheram-Borus MJ, Piacentini J, Cantwell C, Belin TR, Song J. The 18-month impact of an emergency room intervention for adolescent female suicide attempters. J Consult Clin Psychol 2000; 68:1081-93. [PMID: 11142542 DOI: 10.1037/0022-006x.68.6.1081] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Following a suicide attempt by female adolescents, the impact of a specialized emergency room (ER) care intervention was evaluated over the subsequent 18 months. Using a quasi-experimental design, this study assigned 140 female adolescent suicide attempters (SA), ages 12-18 years, and their mothers (88% Hispanic) to receive during their ER visit either: (a) specialized ER care aimed at enhancing adherence to outpatient therapy by providing a soap opera video regarding suicidality, a family therapy session, and staff training; or (b) standard ER care. The adjustment of the SA and their mothers was evaluated over 18 months (follow-up, 92%) using linear mixed model regression analyses. SA's adjustment improved over time on most mental health indices. Rates of suicide reattempts (12.4%) and suicidal reideation (29.8%) were lower than anticipated and similar across ER conditions. The specialized ER care condition was associated with significantly lower depression scores by the SA and lower maternal ratings on family cohesion. Significant interactions of intervention condition with the SA's initial level of psychiatric symptomatology indicated that the intervention's impact was greatest on maternal emotional distress and family cohesion among SA who were highly symptomatic. SA's attendance at therapy sessions following the ER visit was significantly associated with only one outcome--family adaptability. Specialized ER interventions may have substantial and sustained impact over time, particularly for the parents of youth with high psychiatric symptomatology.
Collapse
Affiliation(s)
- M J Rotheram-Borus
- Department of Psychiatry, University of California, Los Angeles 90024, USA.
| | | | | | | | | |
Collapse
|
12
|
Rotheram-Borus MJ, Piacentini J, Van Rossem R, Graae F, Cantwell C, Castro-Blanco D, Feldman J. Treatment adherence among Latina female adolescent suicide attempters. Suicide Life Threat Behav 2000; 29:319-31. [PMID: 10636326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Clinicians must identify factors among suicide-attempting adolescents and their families that increase treatment adherence. Researchers assessed a consecutive series of 140 disenfranchised Latina adolescents (ages 12-18 years) and their mothers presenting at a large urban emergency room after a suicide attempt by the adolescent. Adherence was examined as it related to service delivery, individual background characteristics, and psychosocial factors (current symptomatology, treatment attitudes). Each factor was found to predict adolescent treatment adherence. Adolescents receiving a specialized emergency room program, those with a diagnosis of disruptive behavior disorder, and those from single-parent households attended significantly more therapy sessions compared to their suicide-attempting peers receiving standard emergency room care. Adolescents with a diagnosis of anxiety disorders and those whose mothers reported more psychopathology and perceived more cohesive family relationships tended to attend significantly fewer treatment sessions. The implications for the delivery of emergency room interventions are discussed.
Collapse
Affiliation(s)
- M J Rotheram-Borus
- Department of Psychiatry, University of California at Los Angeles, 90024, USA
| | | | | | | | | | | | | |
Collapse
|
13
|
Rotheram-Borus MJ, Piacentini J, Van Rossem R, Graae F, Cantwell C, Castro-Blanco D, Miller S, Feldman J. Enhancing treatment adherence with a specialized emergency room program for adolescent suicide attempters. J Am Acad Child Adolesc Psychiatry 1996; 35:654-63. [PMID: 8935213 DOI: 10.1097/00004583-199605000-00021] [Citation(s) in RCA: 133] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The evaluation of outpatient treatment adherence among 140 Latina adolescent suicide attempters and their families. METHOD Sequentially, 75 attempters received standard emergency room care and 65 attempters received a specialized emergency room program including (1) training workshops for emergency room staff, (2) a videotape aimed at modifying families' treatment expectations, and (3) an on-call family therapist. RESULTS Attempters receiving the specialized program were more likely to attend one treatment session (95.4% versus 82.7%) and were somewhat more likely to attend more sessions (5.7 versus 4.7) than those receiving standard emergency room care; however, their mothers were less likely to complete treatment. In addition, participants receiving the specialized program reported reduced psychiatric symptoms, and mothers reported more positive attitudes toward treatment and perceptions of family interactions. CONCLUSIONS Adherence was significantly improved by receiving the specialized care program in the emergency room. Adherence was also associated with increased suicidal ideation, more cohesive family relations, and lower self-esteem at baseline.
Collapse
Affiliation(s)
- M J Rotheram-Borus
- Department of Psychiatry, University of California at Los Angeles 90024, USA
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Piacentini J, Rotheram-Borus MJ, Gillis JR, Graae F, Trautman P, Cantwell C, Garcia-Leeds C, Shaffer D. Demographic predictors of treatment attendance among adolescent suicide attempters. J Consult Clin Psychol 1995. [PMID: 7608360 DOI: 10.1037//0022-006x.63.3.469] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The relationship between age and gender and treatment attendance was prospectively examined among a consecutive series of 143 adolescent emergency room attendees referred for outpatient therapy after a suicide attempt. Consistent with previous reports, nonadherence was high. Over 40% of patients had their cases terminated because of nonattendance; on average, however, patients received almost 6 sessions of treatment and 91% attended at least 1 therapy session. Adolescents terminated from treatment for nonadherence were significantly older than those completing treatment. Younger male patients were scheduled for significantly more therapy sessions than older male patients and kept significantly more scheduled sessions than did older male and female patients. Vigorous case-tracking procedures may have a significant impact on treatment attendance. Nevertheless, therapists must design strategies to increase treatment adherence among older adolescent, especially male, patients.
Collapse
Affiliation(s)
- J Piacentini
- Columbia University College of Physicians and Surgeons, USA
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Piacentini J, Rotheram-Borus MJ, Gillis JR, Graae F, Trautman P, Cantwell C, Garcia-Leeds C, Shaffer D. Demographic predictors of treatment attendance among adolescent suicide attempters. J Consult Clin Psychol 1995; 63:469-73. [PMID: 7608360 DOI: 10.1037/0022-006x.63.3.469] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The relationship between age and gender and treatment attendance was prospectively examined among a consecutive series of 143 adolescent emergency room attendees referred for outpatient therapy after a suicide attempt. Consistent with previous reports, nonadherence was high. Over 40% of patients had their cases terminated because of nonattendance; on average, however, patients received almost 6 sessions of treatment and 91% attended at least 1 therapy session. Adolescents terminated from treatment for nonadherence were significantly older than those completing treatment. Younger male patients were scheduled for significantly more therapy sessions than older male patients and kept significantly more scheduled sessions than did older male and female patients. Vigorous case-tracking procedures may have a significant impact on treatment attendance. Nevertheless, therapists must design strategies to increase treatment adherence among older adolescent, especially male, patients.
Collapse
Affiliation(s)
- J Piacentini
- Columbia University College of Physicians and Surgeons, USA
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Zock J, Cantwell C, Swartling J, Hodges R, Pohl T, Sutton K, Rosteck P, McGilvray D, Queener S. The Bacillus subtilis pnbA gene encoding p-nitrobenzyl esterase: cloning, sequence and high-level expression in Escherichia coli. Gene 1994; 151:37-43. [PMID: 7828905 DOI: 10.1016/0378-1119(94)90630-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
p-Nitrobenzyl esters serve as protecting groups on intermediates in the manufacture of clinically important oral beta-lactam antibiotics; de-esterification of the intermediates is required for synthesis of the final product. A Bacillus subtilis PNB carboxy-esterase (PNBCE) catalyzes hydrolysis of several beta-lactam antibiotic PNB esters to the corresponding free acid and PNB alcohol. This communication (i) describes cloning the pnbA gene, which encodes PNBCE, (ii) provides the nucleotide sequence of the pnbA open reading frame (ORF) and (iii) describes a method for efficiently expressing the ORF in Escherichia coli. The amino acid (aa) sequence, deduced from the nucleotide sequence of the pnbA ORF, matched an experimentally determined N-terminal aa sequence of B. subtilis PNBCE and also matched an active site sequence previously identified by biochemical analyses. Specific activity of PNBCE in crude extracts was more than 90-fold greater in recombinant E. coli, as compared to B. subtilis. This increase in expression led to more than a 500-fold improvement in the efficiency of purification of PNBCE.
Collapse
Affiliation(s)
- J Zock
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Abstract
Retrospective analysis was made of office and hospital records of patients with sickle cell hemoglobinopathies. Blood products were transfused only when indicated for symptomatic anemia, severe anemia with a hematocrit less than 18%, sickle crisis, cardiovascular instability, and preoperatively. The Fisher exact test and the Student t test were used for statistical analysis; P < 0.05 was considered significant. All mean values are reported +/- 1 standard deviation. From 1981 to 1991, 40 patients with sickle cell hemoglobinopathies had a total of 61 singleton pregnancies: 36 were complicated by SS disease (SSD), 22 by sickle cell disease (SCD), two by sickle-thalassemia, and one had CC disease (CCD). Only patients with SSD and SCD are reported here. The mean maternal age was 24.3 +/- 5.3 and 19.5 +/- 0.6 years in patients with SSD and SCD, respectively. There was a high occurrence of preterm labor (45% and 20%), preeclampsia (20% and 8.7%), pain crisis (50% and 34.2%), pulmonary complications (25% and 16.7%), and cesarean sections (52.6% and 37.1%) in SSD and SCD, respectively. An average of two units of blood was required by 43.1% of the patients. Two patients with SSD had unpreventable deaths. The mean gestational age at delivery was 35.5 +/- 4.3 and 37.0 +/- 3.7 weeks (P < 0.05), and the mean birthweight was 2443 +/- 926 and 2997 +/- 807 g (P < 0.05), respectively. There were two intrauterine fetal deaths and one neonatal death in the SSD group and one neonatal death in the SCD group. The perinatal mortality was 10.5% and 2.9%, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- M A Seoud
- Department of Obstetrics and Gynecology, University of Kansas Medical Center, Kansas City
| | | | | | | |
Collapse
|
18
|
Cantwell C, Beckmann R, Whiteman P, Queener SW, Abraham EP. Isolation of deacetoxycephalosporin C from fermentation broths of Penicillium chrysogenum transformants: construction of a new fungal biosynthetic pathway. Proc Biol Sci 1992; 248:283-9. [PMID: 1354366 DOI: 10.1098/rspb.1992.0073] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Deacetoxycephalosporin C (DAOC), a precursor of cephalosporins excreted by Cephalosporium and Streptomyces species, has been produced in Penicillium chrysogenum transformed with DNA containing a hybrid penicillin N expandase gene (cefEh) and a hybrid isopenicillin N epimerase gene (cefDh). DAOC from a P. chrysogenum transformant was identified by ultraviolet light (UV), high performance liquid chromatography (HPLC), nuclear magnetic resonance (NMR) and mass spectrum analyses. P. chrysogenum transformed with DNA containing cefEh without cefDh did not produce DAOC. Untransformed P. chrysogenum produced penicillin V (phenoxymethylpenicillin) but not DAOC. Transformants also produced penicillin V but, in general, less than untransformed P. chrysogenum. The cefEh and cefDh genes were constructed by replacing the open reading frame (ORF) of cloned P. chrysogenum pcbC and penDE genes with the ORF of the Streptomyces clavuligerus expandase gene, cefE, and the ORF of the Streptomyces lipmanii epimerase gene, cefD, respectively. Analyses of representative transformants suggested that production of DAOC occurred via cefEh and cefDh genes stably integrated in the P. chrysogenum genome. DNA from untransformed P. chrysogenum did not hybridize to cefE or cefD gene probes.
Collapse
Affiliation(s)
- C Cantwell
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285
| | | | | | | | | |
Collapse
|