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Nader GA, von Walden F, Liu C, Lindvall J, Gutmann L, Pistilli EE, Gordon PM. Resistance exercise training modulates acute gene expression during human skeletal muscle hypertrophy. J Appl Physiol (1985) 2014; 116:693-702. [DOI: 10.1152/japplphysiol.01366.2013] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We sought to determine whether acute resistance exercise (RE)-induced gene expression is modified by RE training. We studied the expression patterns of a select group of genes following an acute bout of RE in naïve and hypertrophying muscle. Thirteen untrained subjects underwent supervised RE training for 12 wk of the nondominant arm and performed an acute bout of RE 1 wk after the last bout of the training program ( training+acute). The dominant arm was either unexercised ( control) or subjected to the same acute exercise bout as the trained arm ( acute RE). Following training, men (14.8 ± 2.8%; P < 0.05) and women (12.6 ± 2.4%; P < 0.05) underwent muscle hypertrophy with increases in dynamic strength in the trained arm (48.2 ± 5.4% and 72.1 ± 9.1%, respectively; P < 0.01). RE training resulted in attenuated anabolic signaling as reflected by a reduction in rpS6 phosphorylation following acute RE. Changes in mRNA levels of genes involved in hypertrophic growth, protein degradation, angiogenesis, and metabolism commonly expressed in both men and women was determined 4 h following acute RE. We show that RE training can modify acute RE-induced gene expression in a divergent and gene-specific manner even in genes belonging to the same ontology. Changes in gene expression following acute RE are multidimensional, and may not necessarily reflect the actual adaptive response taking place during the training process. Thus RE training can selectively modify the acute response to RE, thereby challenging the use of gene expression as a marker of exercise-induced adaptations.
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Affiliation(s)
- G. A. Nader
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - F. von Walden
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - C. Liu
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - J. Lindvall
- Department of Biosciences and Nutrition, Karolinska Institute, Huddinge, Sweden
| | - L. Gutmann
- Department of Neurology, University of Iowa, Iowa City, Iowa
| | - E. E. Pistilli
- Byrd Health Science Center, West Virginia University, Morgantown, West Virginia; and
| | - P. M. Gordon
- School of Education, Health, Human Performance, and Recreation, Baylor University, Waco, Texas
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Peterson MD, Gordon PM, Hurvitz EA. Chronic disease risk among adults with cerebral palsy: the role of premature sarcopoenia, obesity and sedentary behaviour. Obes Rev 2013; 14:171-82. [PMID: 23094988 DOI: 10.1111/j.1467-789x.2012.01052.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 09/18/2012] [Accepted: 09/19/2012] [Indexed: 12/15/2022]
Abstract
Premature declines in function among adults with cerebral palsy (CP) are generally attributed to weakness, spasticity and orthopaedic abnormalities, as well as chronic pain and fatigue. Very little research or clinical attention has been devoted to the confluence and consequences of early muscle wasting and obesity as mediators of secondary comorbidity in this population, and perhaps more importantly, to the role of lifestyle to potentiate these outcomes. At present, there are no national surveillance programmes that monitor chronic health in adults with CP; however, mortality records have demonstrated a greater prevalence of coronary heart disease as compared with the general population. Although by definition, CP is a 'non-progressive' condition, secondary factors such as habitual sedentary behaviour, obesity, and premature sarcoepenia may increase the severity of functional impairment throughout adulthood, and lead to cardiometabolic disease, fragility and/or early mortality. Herein we describe the heightened health risk represented in adults with CP, and discuss the hallmark phenotypic features that coincide with ageing, obesity and cardiometabolic disorders. Moreover, we provide discussion regarding the protective role of habitual physical activity to stimulate anti-inflammatory pathways and to ameliorate global risk. Although physical therapeutic modalities are already widely acknowledged as a vital component to improve movement quality in CP, the purpose of this review was to present a compelling case for the value of lifelong physical activity participation for both function and cardiometabolic health preservation.
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Affiliation(s)
- M D Peterson
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA
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Walsh S, Haddad CJ, Kostek MA, Angelopoulos TJ, Clarkson PM, Gordon PM, Moyna NM, Visich PS, Zoeller RF, Seip RL, Bilbie S, Thompson PD, Devaney J, Gordish-Dressman H, Hoffman EP, Price TB, Pescatello LS. Leptin and leptin receptor genetic variants associate with habitual physical activity and the arm body composition response to resistance training. Gene 2012; 510:66-70. [PMID: 22975643 PMCID: PMC3500611 DOI: 10.1016/j.gene.2012.08.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 07/20/2012] [Accepted: 08/15/2012] [Indexed: 11/20/2022]
Abstract
PURPOSE We investigated the influence of Leptin (LEP) and leptin receptor (LEPR) SNPs on habitual physical activity (PA) and body composition response to a unilateral, upper body resistance training (RT) program. METHODS European-derived American volunteers (men=111, women=131, 23.4 ± 5.4 yr, 24.4 ± 4.6 kg·m(-2)) were genotyped for LEP 19 G>A (rs2167270), and LEPR 326 A>G (rs1137100), 668 A>G (rs1137101), 3057 G>A (rs1805096), and 1968 G>C (rs8179183). They completed the Paffenbarger PA Questionnaire. Arm muscle and subcutaneous fat volumes were measured before and after 12 wk of supervised RT with MRI. Multivariate and repeated measures ANCOVA tested differences among phenotypes by genotype and gender with age and body mass index as covariates. RESULTS Adults with the LEP 19 GG genotype reported more kcal/wk in vigorous intensity PA (1273.3 ± 176.8, p=0.017) and sports/recreation (1922.8 ± 226.0, p<0.04) than A allele carriers (718.0 ± 147.2, 1328.6 ± 188.2, respectively). Those with the LEP 19 GG genotype spent more h/wk in light intensity PA (39.7 ± 1.6) than A allele carriers (35.0 ± 1.4, p=0.03). In response to RT, adults with the LEPR 668 G allele gained greater arm muscle volume (67,687.05 ± 3186.7 vs. 52,321.87 ± 5125.05 mm(3), p=0.01) and subcutaneous fat volume (10,599.89 ± 3683.57 vs. -5224.73 ± 5923.98 mm(3), p=0.02) than adults with the LEPR 668 AA genotype, respectively. CONCLUSION LEP19 G>A and LEPR 668 A>G associated with habitual PA and the body composition response to RT. These LEP and LEPR SNPs are located in coding exons likely influencing LEP and LEPR function. Further investigation is needed to confirm our findings and establish mechanisms for LEP and LEPR genotype and PA and body composition associations we observed.
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Affiliation(s)
- S Walsh
- Department of Physical Education and Human Performance, Central Connecticut State University, New Britain, CT 06050, USA.
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Peterson MD, Liu D, Gordish-Dressman H, Hubal MJ, Pistilli E, Angelopoulos TJ, Clarkson PM, Moyna NM, Pescatello LS, Seip RL, Visich PS, Zoeller RF, Thompson PD, Devaney JM, Hoffman EP, Gordon PM. Adiposity attenuates muscle quality and the adaptive response to resistance exercise in non-obese, healthy adults. Int J Obes (Lond) 2010; 35:1095-103. [PMID: 21139562 DOI: 10.1038/ijo.2010.257] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Emerging data have revealed a negative association between adiposity and muscle quality (MQ). There is a lack of research to examine this interaction among young, healthy individuals, and to evaluate the contribution of adiposity to adaptation after resistance exercise (RE). OBJECTIVE The purpose of this investigation was to examine the influence of subcutaneous adipose tissue (SAT) on muscle function among non-obese individuals before and after RE. DESIGN Analyses included 634 non-obese (body mass index <30 kg m(-2)) subjects (253 males, 381 females; age=23.3 ± 5.2 years). SAT and muscle mass (magnetic resonance imaging-derived SAT and biceps muscle volume), isometric and dynamic biceps strength, and MQ (strength/muscle volume), were analyzed at baseline and after 12 weeks of unilateral RE. RESULTS At baseline, SAT was independently associated with lower MQ for males (β=-0.55; P<0.01) and females (β=-0.45; P<0.01), controlling for body mass and age. Adaptation to RE revealed a significant negative association between SAT and changes for strength capacity (β=-0.13; p=0.03) and MQ (β=-0.14; P<0.01) among males. No attenuation was identified among females. Post-intervention SAT remained a negative predictor of MQ for males and females (β=-0.47; P<0.01). CONCLUSIONS The findings reveal that SAT is a negative predictor of MQ among non-obese, healthy adults, and that after 12 weeks of progressive RE this association was not ameliorated. Data suggest that SAT exerts a weak, negative influence on the adaptive response to strength and MQ among males.
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Affiliation(s)
- M D Peterson
- Laboratory for Physical Activity and Exercise Intervention Research, Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI 48108, USA
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Adams P, Nader GA, Visich PS, Pistilli E, Gutmann L, Lilly C, Hoffman EP, Gordon PM. Acute Apoptotic Transcriptional Responses to Resistance Exercise Training. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- P Adams
- Exercise PhysiologyWest Virginia UniversityPO Box 9227MorgantownWV26506
| | - G A Nader
- Children’s National Medical Center111 Michigan Ave NWWashingtonDC20010
| | - P S Visich
- Central Michigan UniversitySchool of Health SciencesMount PleasantMI48859
| | - E Pistilli
- Exercise PhysiologyWest Virginia UniversityPO Box 9227MorgantownWV26506
| | - L Gutmann
- Exercise PhysiologyWest Virginia UniversityPO Box 9227MorgantownWV26506
| | - C Lilly
- Central Michigan UniversitySchool of Health SciencesMount PleasantMI48859
| | - E P Hoffman
- Children’s National Medical Center111 Michigan Ave NWWashingtonDC20010
| | - P M Gordon
- Exercise PhysiologyWest Virginia UniversityPO Box 9227MorgantownWV26506
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Abstract
Severe drug eruptions may cause diagnostic and therapeutic difficulty when they mimic or provoke endogenous patterns of dermatosis. We report three patients with known psoriasis in whom use of bupropion (Zyban), prescribed to assist with cessation of smoking, led to severe pustular or erythrodermic exacerbation of psoriasis within 3-5 weeks. All patients were systemically unwell and required hospitalization to control the disease flare.
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Affiliation(s)
- N H Cox
- Department of Dermatology, Cumberland Infirmary, Carlisle CA2 7HY, UK.
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Abstract
Group II introns require numerous divalent metal ions for folding and catalysis. However, because little information about individual metal ions exists, elucidating their ligands, functional roles and relationships to each other remains challenging. Here we provide evidence that an essential motif at the catalytic center of the group II intron, the AGC triad within domain 5 (D5), provides a ligand for a crucial metal ion. Sulfur substitution of the pro-Sp oxygen of the adenosine strongly disrupts D5 binding to a substrate consisting of an exon and domains 1-3 of the intron (exD123). Cd2+ rescues this effect by enabling the sulfur-modified D5 to bind to exD123 with wild type affinity and catalyze 5'-splice site cleavage. This switch in metal specificity implies that a metal ion interacts with D5 to mediate packing interactions with D123. This new D5 metal ion rescues the disruption of D5 binding and catalysis with a thermodynamic signature different from that of the metal ion that stabilizes the leaving group during the first step of splicing, suggesting the existence of two distinct metal ions.
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Affiliation(s)
- P M Gordon
- Department of Biochemistry and Molecular Biology, The University of Chicago, 5841 South Maryland Ave., MC1028, Chicago, Illinois 60637, USA
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8
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She Q, Singh RK, Confalonieri F, Zivanovic Y, Allard G, Awayez MJ, Chan-Weiher CC, Clausen IG, Curtis BA, De Moors A, Erauso G, Fletcher C, Gordon PM, Heikamp-de Jong I, Jeffries AC, Kozera CJ, Medina N, Peng X, Thi-Ngoc HP, Redder P, Schenk ME, Theriault C, Tolstrup N, Charlebois RL, Doolittle WF, Duguet M, Gaasterland T, Garrett RA, Ragan MA, Sensen CW, Van der Oost J. The complete genome of the crenarchaeon Sulfolobus solfataricus P2. Proc Natl Acad Sci U S A 2001; 98:7835-40. [PMID: 11427726 PMCID: PMC35428 DOI: 10.1073/pnas.141222098] [Citation(s) in RCA: 636] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2001] [Accepted: 05/04/2001] [Indexed: 12/23/2022] Open
Abstract
The genome of the crenarchaeon Sulfolobus solfataricus P2 contains 2,992,245 bp on a single chromosome and encodes 2,977 proteins and many RNAs. One-third of the encoded proteins have no detectable homologs in other sequenced genomes. Moreover, 40% appear to be archaeal-specific, and only 12% and 2.3% are shared exclusively with bacteria and eukarya, respectively. The genome shows a high level of plasticity with 200 diverse insertion sequence elements, many putative nonautonomous mobile elements, and evidence of integrase-mediated insertion events. There are also long clusters of regularly spaced tandem repeats. Different transfer systems are used for the uptake of inorganic and organic solutes, and a wealth of intracellular and extracellular proteases, sugar, and sulfur metabolizing enzymes are encoded, as well as enzymes of the central metabolic pathways and motility proteins. The major metabolic electron carrier is not NADH as in bacteria and eukarya but probably ferredoxin. The essential components required for DNA replication, DNA repair and recombination, the cell cycle, transcriptional initiation and translation, but not DNA folding, show a strong eukaryal character with many archaeal-specific features. The results illustrate major differences between crenarchaea and euryarchaea, especially for their DNA replication mechanism and cell cycle processes and their translational apparatus.
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Affiliation(s)
- Q She
- Microbial Genome Group, Institute of Molecular Biology, University of Copenhagen, Sølvgade 83H, DK-1307 Copenhagen, Denmark
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Gordon PM, Newcomer RR, Krummel DA. Physical activity and osteoporosis: disparities between knowledge and practice. W V Med J 2001; 97:153-6. [PMID: 11471464] [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] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Osteoporosis and osteoporosis-related conditions are national health priorities, and physical activity has been associated with a reduction of osteoporosis risk factors (i.e., increased bone mineral density and decreased falls). Our study examined the disparity between awareness of physical activity as an osteoporosis prevention strategy and the quantity and quality of physical activity performed. Results indicate that most individuals view physical activity as an important prevention strategy. However, few participants are engaged in physical activity which meets current public health recommendations despite their awareness of physical activity health benefits. Barriers to regular exercise are discussed as well as promising approaches to reducing barriers through alterations to physical and social environments.
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Affiliation(s)
- P M Gordon
- West Virginia University School of Medicine, Morgantown, USA
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Gordon PM, Sontheimer EJ, Piccirilli JA. Kinetic characterization of the second step of group II intron splicing: role of metal ions and the cleavage site 2'-OH in catalysis. Biochemistry 2000; 39:12939-52. [PMID: 11041859 DOI: 10.1021/bi001089o] [Citation(s) in RCA: 56] [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: 11/30/2022]
Abstract
The ai5gamma group II intron from yeast excises itself from precursor transcripts in the absence of proteins. When a shortened form of the intron containing all but the 3'-terminal six nucleotides is incubated with an exon 1 oligonucleotide and a 3' splice site oligonucleotide, a nucleotidyl transfer reaction occurs that mimics the second step of splicing. As this tripartite reaction provides a means to identify important functional groups in 3' splice site recognition and catalysis, we establish here a minimal kinetic framework and demonstrate that the chemical step is rate-limiting. We use this framework to characterize the metal ion specificity switch observed previously upon sulfur substitution of the 3'-oxygen leaving group and to elucidate by atomic mutagenesis the role of the neighboring 2'-OH in catalysis. The results suggest that both the 3'-oxygen leaving group and the neighboring 2'-OH are important ligands for metal ions in the transition state but not in the ground state and that the 2'-OH may play an additional role in transition state stabilization by donating a hydrogen bond. Metal specificity switch experiments combined with quantitative analysis show that the Mn(2+) that interacts with the leaving group binds to the ribozyme with the same affinity as the metal ion that interacts with the neighboring 2'-OH, raising the possibility that a single metal ion mediates interactions with the 2'- and 3'-oxygen atoms at the 3' splice site.
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Affiliation(s)
- P M Gordon
- Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology, The University of Chicago, 5841 South Maryland Avenue, MC1028, Chicago, Illinois 60637, USA
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Abstract
In the U.K., patients with suspected skin tumours are usually referred from a general practitioner to a hospital-based dermatologist for treatment. The urgency of such referrals is currently a topic of political importance. We have studied case record data from 162 patients with basal cell carcinoma (BCC) to establish the relevance of referrals routinely being considered urgent. At presentation, mean tumour size (maximum dimension) was 7. 4 mm (median 10) and mean duration of BCC was 20.5 months (median 12). There was no correlation (all P > 0.05) between tumour size and patient age (r = 0.1325), tumour size and duration (r = 0.4433), or tumour size and interval between referral and hospital consultation (r = 0.0695). If the slow growth rate of the average BCC is assumed to be linear, a reduction in referral interval from the mean value of 10.7 weeks in our patients down to the U.K. government target of 2 weeks would equate to a size difference in BCC of 0.7 mm, which is not therapeutically significant. Individual BCCs with rapid growth or other features of concern may require urgent referral, but evidence from our patients and from other studies is that this is not routinely necessary.
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP, U.K
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Gordon PM, Sontheimer EJ, Piccirilli JA. Metal ion catalysis during the exon-ligation step of nuclear pre-mRNA splicing: extending the parallels between the spliceosome and group II introns. RNA 2000; 6:199-205. [PMID: 10688359 PMCID: PMC1369906 DOI: 10.1017/s1355838200992069] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Mechanistic analyses of nuclear pre-mRNA splicing by the spliceosome and group II intron self-splicing provide insight into both the catalytic strategies of splicing and the evolutionary relationships between the different splicing systems. We previously showed that 3'-sulfur substitution at the 3' splice site of a nuclear pre-mRNA has no effect on splicing. We now report that 3'-sulfur substitution at the 3' splice site of a nuclear pre-mRNA causes a switch in metal specificity when the second step of splicing is monitored using a bimolecular exon-ligation assay. This suggests that the spliceosome uses a catalytic metal ion to stabilize the 3'-oxyanion leaving group during the second step of splicing, as shown previously for the first step. The lack of a metal-specificity switch under cis splicing conditions indicates that a rate-limiting conformational change between the two steps of splicing may mask the subsequent chemical step and the metal-specificity switch. As the group II intron, a true ribozyme, uses identical catalytic strategies for splicing, our results strengthen the argument that the spliceosome is an RNA catalyst that shares a common molecular ancestor with group II introns.
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Affiliation(s)
- P M Gordon
- Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute, The University of Chicago, Illinois 60637, USA
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13
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Abstract
BACKGROUND Regular exercise to elicit caloric expenditure is an important component for achieving weight loss. The Healthy People 2000 objectives recommend regular sustained physical activity lasting 30 minutes, five days per week (Objective 1.3) particularly for weight loss. Moreover, this recommendation has been restated for weight loss and overall health benefits in the Centers for Disease Control and Prevention / American College of Sports Medicine (CDC/ACSM) statement and Surgeon General's Report (SGR) on Physical ActivitY and Health. Thus, we sought to identify the relative quality, and quantity of physical activity among people trying to lose weight. DESIGN Cross-sectional self-reported data from the West Virginia Behavioral Risk Factor Surveillance System (BRFSS) were used. The BRFSS is a state-based telephone survey of adults that uses a multistage cluster design based on the Waksberg method of random-digit dialing. Data froM 2769 men and 4490 women were obtained from the 1992, 1994, and 1996 surveys. RESULTS Half (49.6%) of individuals trying to lose weight did not engage in any physical activity. Further, only 15% of respondents trying to lose weight reported exercising regularly. Nevertheless, those trying to lose weight were more likely (OR [odds ratio] = 1.3; 95% CI [confidence interval], 1.14, 1.51, p < 0.001) to exercise regularly than those not trying to lose weight. In particular, women trying to lose weight were significantly more likely (OR = 1.45; 95% CI, 1.22,1.74, p < 0.001) to exercise regularly than women not trying to lose weight. Conversely, men trying to lose weight were no more likely to exercise regularly (p = .23) than men not trying to lose weight. Among respondents who were using exercise for weight loss, only 14.7% were expending > or =1000 kcal/week and 18.2% were expending > or =500 kcal/week. Weekly expenditure rates of > or =1000 kcal/week were more likely to occur among men (17%) than women (13.8%), in younger age groups, and among those with higher educational attainment. CONCLUSION These data suggest that while certain individuals trying to lose weight are more likely to engage in regular physical activity, most persons trying to lose weight have not adopted regular physical activity as part of their weight loss practice. These results suggest that public health efforts to effectively integrate physical activity into weight control practices of West Virginians have been minimally successful.
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Affiliation(s)
- P M Gordon
- West Virginia University School of Medicine, Morgantown 26506, USA.
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14
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Abstract
BACKGROUND Although PUVA treatment of psoriasis is more effective than conventional or broad-band UVB phototherapy, two small studies have suggested that narrow-band or TL-01 phototherapy may have a therapeutic effect equal to PUVA. If confirmed, this would be of considerable importance as TL-01 therapy is likely to be considerably safer in the long term than PUVA. OBJECTIVE The purpose of this study was to compare PUVA with narrow-band (TL-01) phototherapy in psoriasis. METHODS We studied 100 patients with plaque-type psoriasis who were randomly allocated to twice-weekly treatment with PUVA or narrow-band UVB. RESULTS Clearance of psoriasis was achieved in a significantly greater proportion of patients treated with PUVA (84%) than with TL-01 (63%) (P =.018), and with significantly fewer treatments (median number of treatments for clearance with PUVA, 16.7; with TL-01, 25.3; P =.001). Only 12% of those treated with TL-01 were clear of psoriasis 6 months after finishing treatment compared with 35% for PUVA (P =.002). CONCLUSION When given twice weekly, PUVA is more effective for psoriasis than narrow-band UVB phototherapy.
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
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15
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Abstract
The identical reaction pathway executed by the spliceosome and self-splicing group II intron ribozymes has prompted the idea that both may be derived from a common molecular ancestor. The minimal sequence and structural similarities between group II introns and the spliceosomal small nuclear RNAs, however, have left this proposal in question. Mechanistic comparisons between group II self-splicing introns and the spliceosome are therefore important in determining whether these two splicing machineries may be related. Here we show that 3'-sulfur substitution at the 5' splice site of a group II intron causes a metal specificity switch during the first step of splicing. In contrast, 3'-sulfur substitution has no significant effect on the metal specificity of the second step of cis-splicing. Isolation of the second step uncovers a metal specificity switch that is masked during the cis-splicing reaction. These results demonstrate that group II intron ribozymes are metalloenzymes that use a catalytic metal ion for leaving group stabilization during both steps of self-splicing. Furthermore, because 3'-sulfur substitution of a spliceosomal intron has precisely the same effects as were observed during cis-splicing of the group II intron, these results provide striking parallels between the catalytic mechanisms employed by these two systems.
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Affiliation(s)
- E J Sontheimer
- Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute, University of Chicago, Chicago, Illinois 60637, USA
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16
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Abstract
A device for phototesting patients prior to narrowband phototherapy is described. One hundred and fifty patients (130 with psoriasis and 20 with eczema) of skin types I-IV were phototested on the forearm and 22 on both forearm and back. The minimal erythema dose (MED) was judged visually 24 h after irradiation, and in those patients who were tested at two body sites, objective measurement of the erythema was made using a reflectance instrument. The MED values on the arm showed a fivefold range. There was no significant association between skin type and MED. The MED values on the arm were significantly higher than those measured on the back, although the differences were small in the majority of cases. No significant difference was found between the slopes of the dose-response curves measured on the arm and on the back.
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP, U.K
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18
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Goodwin JE, Grimes CR, Eckerson JM, Gordon PM. Effect of different quantities of variable practice on acquisition, retention, and transfer of an applied motor skill. Percept Mot Skills 1998; 87:147-51. [PMID: 9760639 DOI: 10.2466/pms.1998.87.1.147] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/15/2022]
Abstract
This investigation examined the effect of manipulating different quantities of variable practice in the acquisition phase on the retention and transfer performance of a dart throw. Participants in the Specific condition practiced a total of 75 acquisition trials from a distance of 2.39 m. Participants in the Specific + Variable condition practiced a total of 75 acquisition trials with 25 trials from distances of 1.47 m, 2.39 m, and 3.30 m. Participants in the Specific + Varplus condition practiced a total of 75 acquisition trials with 15 trials from distances of 1.47 m, 1.93 m, 2.39 m, 2.84 m, and 3.30 m. Results of the one-way analysis of variance on the 24-hr. retention test from 2.39 m yielded no significant differences among practice conditions for mean radial error. A one-way analysis of variance on the 24-hr. transfer test from 3.76 m indicated that the Specific + Variable and Specific + Varplus conditions performed with significantly smaller mean radial error than the Specific condition. The results are discussed in regard to recent research and applicability to instructional settings.
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Affiliation(s)
- J E Goodwin
- Department of Health, Physical Education, Recreation and Dance, Eastern Michigan University, Ypsilanti 48197, USA
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19
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Gordon PM, Fowler S, Warty V, Danduran M, Visich P, Keteyian S. Effects of acute exercise on high density lipoprotein cholesterol and high density lipoprotein subfractions in moderately trained females. Br J Sports Med 1998; 32:63-7. [PMID: 9562167 PMCID: PMC1756068 DOI: 10.1136/bjsm.32.1.63] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [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: 02/07/2023]
Abstract
Increases in high density lipoprotein cholesterol (HDL-C) levels have previously been reported after moderate exercise bouts lasting less than two hours in men. Little information exists, however, on HDL-C responses after moderate duration exercise in women. Post-exercise HDL-C modifications may appear differently in women because of higher baseline HDL-C concentrations and differences in lipolytic activity. To determine the influence of exercise on acute HDL-C responses in women, 12 trained premenopausal women (22 (4) years old; mean (SD)) who ran 24-48 km a week exercised on a motor driven treadmill at 75% VO2MAX until 3.34 MJ (800 kcal) were expended (72 (9) min). Subjects were all tested during the early follicular phase of their menstrual cycle. Fasting blood samples were obtained before exercise (baseline), immediately after (IPE), one hour after (1 h PE), 24 hours after (24 h PE), and 48 hours after (48 h PE) exercise. Plasma was analysed for HDL-C, HDL2-C, and HDL3-C. A significant increase in HDL-C was observed 48 h PE (p<0.05). HDL3-C increased IPE (p<0.01) but returned to baseline at 1 h PE. In contrast, HDL2-C was not significantly different from baseline at any time point. The rise in HDL-C, however, was attributed to an increase in both HDL2 and HDL3. Moreover, at 48 h PE, the increase in HDL-C correlated highly with changes in HDL2-C (r = 0.92). Thus it appears that exercise of moderate duration can elicit similar post-exercise increases in HDL-C in women to those previously reported in men. However, the changes in HDL subfractions leading to the rise in HDL-C may be different in women.
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Affiliation(s)
- P M Gordon
- School of Medicine, West Virginia University, Morgantown 26506-6116, USA
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Royal Victoria Infirmary, Newcastle, UK
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Gordon PM, O'Donnell M, Benton EC, McLaren KM. An erythematous plaque above the ear. Skin involvement by a B-cell follicular centrocytic/centroblastic lymphoma. Arch Dermatol 1997; 133:1455, 1458. [PMID: 9371035 DOI: 10.1001/archderm.133.11.1455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- P M Gordon
- University of Edinburgh Medical School, Scotland
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Abstract
Acne fulminans is a rare form of acne vulgaris of acute onset, affecting mostly teenage boys and associated with a number of systemic symptoms and abnormal investigations. The occurrence of bone lesions in this condition is rare but well recognized, and often bone biopsies are performed to rule out malignancy or infection. We report a 13-year-old boy referred to the pediatric oncologists with multiple osteolytic bone lesions. He was noted to have severe acne. A potentially painful sternal bone biopsy was averted following dermatologic referral when a diagnosis of acne fulminans was made. Pediatricians and dermatologists need to be aware of this association so that unnecessary anguish and investigations can be avoided.
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Royal Victoria Infirmary, Newcastle Upon Tyne, England
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Gordon PM, Visich PS, Goss FL, Fowler S, Warty V, Denys BJ, Metz KF, Robertson J. Comparison of exercise and normal variability on HDL cholesterol concentrations and lipolytic activity. Int J Sports Med 1996; 17:332-7. [PMID: 8858403 DOI: 10.1055/s-2007-972856] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 02/02/2023]
Abstract
In order to compare the influence of a single bout of exercise on HDL-C metabolism with normal variability, 12 male runners (mean age: 24.9 +/- 4 yr) who ran 15-30 miles per week underwent exercise (E) and control (C) experimental conditions. During the E trial subjects ran on a motor driven treadmill at 75% (42.5 +/- 4.7 ml.kg-1.min-1) VO2max until 800 Kcals were expended. The C trial consisted of no exercise. Subjects were instructed to follow the same diet and keep a four d food diary during each experimental condition. Fasted blood samples were obtained at the same time of day in each condition at time points corresponding to 24 h pre-exercise (24 PRE), 6 h post- (6 h) and 24 h post-exercise (24 h). Plasma was analyzed for HDL-C, HDL2-C and HDL3-C (mg.dl-1). In addition post-heparin plasma samples were analyzed for lipoprotein lipase (LPL) and hepatic lipase (HL) activity (mumol.FFA-1.ml-1). All values were adjusted for changes in plasma volume and compared to Baseline. HDL-C levels were unaltered following the C trial. However, following the E trial, HDL-C increased (p < 0.01) above baseline values at 24 h. The increase in HDL-C was reflected in the HDL3-C subfraction (p < 0.05). Analysis of lipolytic activity revealed an overall greater LPL activity (p < 0.05) in the E trial vs the C trial. In addition, a decrease in HL was observed at 24 h (p < 0.05) but was not different between experimental conditions. These data suggest that exercise and not normal variability are responsible for alterations in lipolytic activity and corresponding increases in HDL-C levels.
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Affiliation(s)
- P M Gordon
- Human Energy Research Laboratory, University of Pittsburgh, USA
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Gordon PM, Aldrige RD, McVittie E, Hunter JA. Topical diphencyprone for alopecia areata: evaluation of 48 cases after 30 months' follow-up. Br J Dermatol 1996; 134:869-71. [PMID: 8736327] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Forty-eight patients (23 male, 25 female) with severe alopecia areata were sensitized and treated with topical diphencyprone. Thirty-eight per cent of the subjects had good regrowth of hair at a mean follow-up period of 30.8 months. The presence of nail changes, a personal history of atopy and a long duration of alopecia had an adverse prognostic effect.
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Affiliation(s)
- P M Gordon
- University Department of Dermatology, Royal Infirmary of Edinburgh NHS Trust, Scotland, U.K
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Abstract
An eczematous eruption developed on the anterior chest of a 58-year-old woman with known nickel sensitivity after the insertion of nickel-containing sternotomy wires. Her wound was revised with removal of the wires to give immediate and sustained relief from the itch. The electron microscopy and parasternal biopsy histology demonstrating a sarcoidal reaction are discussed.
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Affiliation(s)
- P M Gordon
- University Department of Dermatology, Royal Infirmary of Edinburgh NHS Trust, Scotland
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27
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Wiley JL, Compton DR, Gordon PM, Siegel C, Singer M, Dutta A, Lichtman AH, Balster RL, Razdan RK, Martin BR. Evaluation of agonist-antagonist properties of nitrogen mustard and cyano derivatives of delta 8-tetrahydrocannabinol. Neuropharmacology 1996; 35:1793-804. [PMID: 9076759 DOI: 10.1016/s0028-3908(96)00120-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 02/04/2023]
Abstract
delta 8-Tetrahydrocannabinol (delta 8-THC) is a naturally occurring cannabinoid with a characteristic pharmacological profile of in vivo effects. Previous studies have shown that modification of the structure of delta 8-THC by inclusion of a nitrogen-containing functional group alters this profile and may alkylate the cannabinoid receptor, similar to the manner in which beta-funaltrexamine (beta-FNA) alkylates the micro-opioid receptor. Two novel analogs of delta 8-THC were synthesized: a nitrogen mustard analog with a dimethylheptyl side chain (NM-delta 8-THC) and a cyano analog with a dimethylpentyl side chain (CY-delta 8-THC). Both analogs showed high affinity for brain cannabinoid receptors and when administered acutely, produced characteristic delta 9-THC-like effects in mice, including locomotor suppression, hypothermia, antinociception and catalepsy. CY-delta 8-THC shared discriminative stimulus effects with CP 55,940; for NM-delta 8-THC, these effects also occurred, but were delayed. Although both compounds attenuated the effects of delta 9-THC in the mouse behavioral tests, evaluation of potential antagonist effects of these compounds was complicated by the fact that two injections of delta 9-THC produced similar results, suggesting that acute tolerance or desensitization might account for the observations. NM-delta 8-THC, but not CY-delta 8-THC, attenuated the discriminative stimulus effects of CP 55,940 in rats several days following injection. Hence, addition of a nitrogen-containing functional group to a traditional cannabinoid structure does not eliminate agonist effects and may produce delayed attenuation of cannabinoid-induced pharmacological effects.
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Affiliation(s)
- J L Wiley
- Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0613, USA
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Visich PS, Goss FL, Gordon PM, Robertson RJ, Warty V, Denys BG, Metz KF. Effects of exercise with varying energy expenditure on high-density lipoprotein-cholesterol. Eur J Appl Physiol Occup Physiol 1996; 72:242-48. [PMID: 8820893 DOI: 10.1007/bf00838646] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
To investigate the effect of varying energy expenditure on acute high-density lipoprotein-cholesterol (HDL-C) changes, 12 healthy endurance-trained men completed three- counterbalanced running trials at different energy expenditures: trial 1, 1690.3 (24.4) kJ [mean (SD)]; trial 2, 2529.1 (24.0) kJ; trial 3, 3384.3 (36.6) kJ, with exercise intensity at 75% of maximal oxygen consumption. For each trial, blood samples were collected at 24 h pre-exercise (24 h Pre), immediately post-exercise, 1 h post-exercise, 6 h post-exercise (6 h PE), and 24 h post-exercise (24 h PE). Plasma samples were analyzed for HDL-C, HDL2-C and HDL3-C subfractions, and triglycerides (TG). In addition, post-heparin plasma samples were analyzed at 24 h Pre, 6 h PE and 24 h PE for lipoprotein lipase activity (LPLA) and hepatic triglyceride lipase activity. All samples were corrected for plasma volume changes and compared to 24 h Pre (baseline). When trials were combined, an increase (P < 0.05) in HDL-C was observed 24 h PE, via an increase (P < 0.05) in HDL3-C. An increase (P < 0.05) in LPLA and decrease (P < 0.05) in TG at 24 h PE is suggested to be responsible for the increase in HDL3-C. In conclusion, no difference in HDL-C was observed among trials. However, when trials were combined, an increase in HDL-C was observed, suggesting that an energy expenditure of no greater than 3384 kJ is needed to promote favorable changes in HDL-C.
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Affiliation(s)
- P S Visich
- Human Energy Research Laboratory, University of Pittsburgh, Pennsylvania, USA
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Affiliation(s)
- P M Gordon
- University Department of Dermatology, Royal Infirmary, Edinburgh
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Abstract
We report six cases of Dermatobia hominis myiasis imported into the U.K. from Belize. With increasing international travel, myiasis may be encountered more frequently in countries in which the parasites are not indigenous. The life-cycle of D. hominis is described, and scanning electron micrographs show the detailed appearance of the larva.
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Affiliation(s)
- P M Gordon
- University Department of Dermatology, Royal Infirmary of Edinburgh, U.K
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Abstract
We report a patient who developed symptoms of lupus erythematosus which was apparently related to minocycline therapy for acne vulgaris. To our knowledge, this is only the second reported case of minocycline-associated lupus erythematosus.
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Aberdeen Royal Hospitals NHS Trust, Aberdeen Royal Infirmary, Foresterhill, U.K
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Abstract
To determine whether exercise intensity influences acute HDL-C responses, 12 male recreational runners (24.8 +/- 4 yr) who ran 15-30 miles.wk-1 exercised on a motor driven treadmill at 60% (L) and 75% (H) VO2max. A counterbalanced experimental design was utilized and energy expenditure was 800 Kcal. Fasting blood samples were obtained 24 h before exercise (24 PRE), immediately post-(IPE), 1 h post- (1 h PE), 6 h post- (6 h PE), and 24 h post- (24 h PE) exercise and analyzed for HDL-C and HDL2&3-C. In addition, postheparin plasma samples, obtained 24 h PRE, 6 h PE, and 24 h PE were analyzed for lipolytic activity--LPLA and HTGLA. An exercise trial by time interaction was observed for HDL-C (P < 0.01). Post-hoc analysis revealed no change in HDL-C following the L trial. However, an increase in HDL-C was observed 24 h PE (P < 0.01) following the H trial. The increase in HDL-C was attributed to an elevated HDL3-C (P < 0.01), with no change in HDL2-C. Analysis of plasma lipolytic activity revealed an increase in LPLA 24 h PE (P < 0.05) which may be responsible for the postexercise alterations in HDL-C. However, HTGLA decreased 6 h PE (P < 0.01) and 24 h PE (P < 0.05). We conclude that increases in HDL-C levels following endurance activity are influenced, in part, by the exercise intensity.
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Affiliation(s)
- P M Gordon
- Human Energy Research Laboratory, University of Pittsburgh, PA
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Abstract
The clinical and pathological features of 11 cases of regressing keratoacanthoma are presented. These lesions were from sun-exposed skin of individuals between the ages of 58 and 92 years and were of short clinical duration (2-12 months). Histologically, these lesions showed similar features and consisted of symmetrical shallow cup-shaped invaginations of thin atrophic epidermis with overhanging edges. The underlying papillary dermis demonstrated variable degrees of inflammatory infiltrate and scarring. It is important to recognize these features as representing regressed keratoacanthoma as they may be confused with other unrelated skin conditions.
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Affiliation(s)
- K Blessing
- University Department of Pathology, Aberdeen Royal Infirmary, UK
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Affiliation(s)
- P M Gordon
- Department of Dermatology, Aberdeen Royal Hospitals (NHS Trust), UK
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Abstract
A case of cutaneous cryptococcosis (encapsulated strain) in a 67-year-old female, with no evidence of immune suppression (normal cell surface marker analysis and mitogen proliferation studies) and which responded to treatment with oral fluconazole is reported. To date her clinical progress remains satisfactory after 12 months of follow-up.
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Affiliation(s)
- P M Gordon
- Department of Dermatology, University of Aberdeen, UK
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Gordon PM, Visich P, Goss F. 1069 COMPARISON OF EXERCISE AND DIURNAL CHANGES ON IIDL-C, HDL SUBFRACTIONS AND LIPID ENZYMES. Med Sci Sports Exerc 1993. [DOI: 10.1249/00005768-199305001-01072] [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: 11/21/2022]
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Abstract
In acute septic arthritis, the synovial fluid is usually frankly purulent. However, the presence of pus does not always imply the presence of infection, and some synovial fluids are easily mistaken for pus. An exaggeration of the normal leucocyte response in inflammatory joint fluids may alone simulate sepsis; marked increases in certain lipid fractions of the fluid may produce similar appearances. We describe a patient who presented with two examples of such 'pseudoseptic arthritis'.
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Affiliation(s)
- M J Garton
- Department of Rheumatology, City Hospital, Aberdeen
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Gordon PM, Goss FL, Warty V, Denys B, Robertson RJ, Metz K, Visich P. THE ACUTE EFFECTS OF EXERCISE AT DIFFERENT INTENSITIES ON HDL-C AND HDL-C SUDFRACTIONS. Med Sci Sports Exerc 1992. [DOI: 10.1249/00005768-199205001-01061] [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: 11/21/2022]
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Abstract
A 32-year-old male presented to hospital with a transient hemiplegia associated with a rash and systemic upset. He was found to have an acute Epstein-Barr virus (EBV) infection. Hemiplegia complicating glandular fever has been described but once previously.
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Affiliation(s)
- D J Adamson
- Wards 25/26, Aberdeen Royal Infirmary, United Kingdom
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Compton DR, Prescott WR, Martin BR, Siegel C, Gordon PM, Razdan RK. Synthesis and pharmacological evaluation of ether and related analogues of delta 8-, delta 9-, and delta 9,11-tetrahydrocannabinol. J Med Chem 1991; 34:3310-6. [PMID: 1659638 DOI: 10.1021/jm00115a023] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [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: 12/28/2022]
Abstract
The primary goal of this research was to synthesize a series of ether analogues of the cannabinoid drug class and to evaluate their agonist and antagonist pharmacological properties in either the mouse or the rat. Agonist and antagonist activity was evaluated in mice using a multiple-evaluation procedure (locomotor activity, tail-flick latency, hypothermia, ring immobility) and activity in rats determined in a discriminative stimulus paradigm. Additionally, novel analogues were evaluated for their ability to bind to the THC receptor site labeled by 3H-CP-55,940. None of the cannabinoid analogues were capable of attenuating the effects of delta 9-THC (3 mg/kg) in either the rat (doses up to 10 mg/kg) or in the mouse (doses up to 30 mg/kg). It also appears that the compounds with minimal in vivo activity are not mixed agonist/antagonists. These data would suggest that the phenolic hydroxyl is important for receptor recognition (binding) and in vivo potency. Additionally, cannabinoid methyl ethers previously considered inactive have been found to produce limited activity. Lastly, data suggest that delta 9,11-THC is more potent than previous reports indicated, and does possess pharmacological activity.
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Affiliation(s)
- D R Compton
- Medical College of Virginia, Virginia Commonwealth University, Richmond 23298
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Visich PS, Michael TJ, Gordon PM, Goss FL, Robertson KJ. 512 EFFECT OF FASTING ON PHYSIOLOGICAL RESPONSES DURING MAXIMAL TREADMILL EXERCISE. Med Sci Sports Exerc 1990. [DOI: 10.1249/00005768-199004000-00512] [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: 11/21/2022]
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Abstract
4-Demethoxy-10-nordaunomycinone (4) is synthesized starting with 4,7-dimethoxy-1-indanone (8). Nucleophilic addition of ethynyl magnesium bromide to 8 followed by mercuric acetate oxidation and iron pentacarbonyl – tri-n-butyltin hydride reduction gave 4,7-dimethoxy-1-acetylindane (16). Condensation of 16 with phthalic anhydride followed by methylation with dimethylsulfate and oxidation gave 22, which was epimerized to 24 by 2,2-dimethoxypropane and trifluoroacetic acid. Demethylation of 24 with aluminum chloride gave the 4-demethoxy-10-nordaunomycinone (4).
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Lautin EM, Gordon PM, Friedman AC, McCormick JF, Fromowitz FB, Goldman MJ, Sugarman LA. Radionuclide imaging and computed tomography in renal oncocytoma. Radiology 1981; 138:185-90. [PMID: 7455081 DOI: 10.1148/radiology.138.1.7455081] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Renal oncocytoma is an apparently benign neoplasm that is being reported with increasing frequency. It is important to differentiate it from renal-cell carcinoma prior to surgery. Angiographic, CT, and ultrasound studies may suggest the diagnosis but are not pathognomonic. In 4 cases, 99mTc-glucoheptonate imaging of the renal tubules was performed; one patient was also scanned in 131I-orthoidohippurate. There was no evidence of radionuclide uptake by the tumor. Reasons for the lack of success in differentiating renal oncocytoma from renal-cell carcinoma are discussed.
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Lautin EM, Gordon PM, Friedman AC, Dourmashkin L, Fromowitz F. Emphysematous pyelonephritis: optimal diagnosis and treatment. Urol Radiol 1980; 1:93-6. [PMID: 553377 DOI: 10.1007/bf02926608] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A case of emphysematous pyelonephritis is presented in which computerized tomography (CT) both confirmed the diagnosis and demonstrated extension of the gas to the region of the adrenal glands and inferior cava. The etiology and pathogenesis of emphysematous pyelonephritis is discussed. Radiologic evaluation of this disease should be prompt and noninvasive. Plain films establish the diagnosis, isotope scanning assesses function of the opposite kidney, and CT demonstrates the full extent of the pathological process and confirms the diagnosis. Aggressive treatment is recommended.
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Gordon PM. On planning to dialyse at home. Biomed Eng 1973; 8:474-5. [PMID: 4805473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Colebatch JH, Matthews RN, Gordon PM, Tan CL, Santamaria JN, Lay HN. Asparaginase in acute leukaemia. Med J Aust 1970; 1:282. [PMID: 5266297 DOI: 10.5694/j.1326-5377.1970.tb77858.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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