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Walter KR, Ford FE, Gregoski MJ, Kramer RM, Knight KD, Spruill L, Nogueira LM, Krisanits BA, Taylor MH, La Rue AC, Lilly MB, Ambs S, Chan K, Turner TF, Varner H, Singh S, Uribarri J, Garrett-Mayer E, Armeson KE, Hilton EJ, Clair M, Findlay VJ, Peterson LL, Magwood G, Turner DP. Abstract C024: Lifestyle-associated advanced glycation end products are elevated in ER+ positive breast cancer patients, alter response to therapy, and can be targeted by lifestyle intervention. Cancer Epidemiol Biomarkers Prev 2020. [DOI: 10.1158/1538-7755.disp18-c024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Lifestyle factors associated with personal behavior can alter tumor-associated biologic pathways and thereby increase cancer risk, growth and disease recurrence. Advanced glycation end products (AGEs) are reactive metabolites produced endogenously as a byproduct of normal metabolism. A Western lifestyle consisting of high-fat, high-sugar and processed foods as well as little exercise can lead to a significant increase in AGE accumulation in the body and is also associated with driving cancer disparity. Increased AGE accumulation promotes disease phenotypes through modification of the genome, protein crosslinking and dysfunction, and aberrant cell signaling. We evaluated AGE levels in biospecimens from ER+ and ER- breast cancer patients, examined their role in therapy resistance, and assessed the ability of a lifestyle intervention to reduce circulating AGE levels in ER+ breast cancer survivors. A correlation between ER status and AGE levels was observed in tumor and serum samples. AGE treatment of ER+ breast cancer cells impacted pathways associated with ER regulation. We observed a significant increase in phosphorylation of ERalpha following AGE treatment when compared to untreated control with no change in total ERalpha levels. We also observed a significant increase in both AKT and ERK phosphorylation in ER+ cell lines in response to AGE treatment in a time-dependent manner. Inhibition of AKT with Ly294002 and inhibition of ERK with the MEK inhibitor U0126 significantly reduced ERalpha phosphorylation in the presence of AGE. Significantly, ER+ cells treated with AGEs no longer responded to hormonal therapy with tamoxifen. In a proof-of-concept study we examined the ability of a defined exercise and dietary intervention (i.e., cardiac rehabilitation) to reduce circulatory AGE levels in ER+ breast cancer survivors. A significant increase in average very active minutes and average calories burned was observed as a result of the intervention. This was accompanied by a significant reduction in dietary-AGE intake and also showed significant reductions in circulating AGE levels when fasting serum samples were analyzed by ELISA. An analysis of IL6 and CRP levels by ELISA in the same AGE assessed samples revealed no significant differences at any time point. There is a potential prognostic and therapeutic role for lifestyle-derived AGEs in cancer disparity. Given the potential benefits of lifestyle intervention on cancer incidence and mortality, opportunities exist for the development of community health and nutritional programs aimed at reducing AGE exposure in order to improve cancer prevention and treatment outcomes. Lifestyle interventions that lower AGE levels may then be utilized to reduce breast cancer incidence and improve prognosis in cancer disparity populations.
Citation Format: Katherine R. Walter, Ford E. Ford, Mathew J. Gregoski, Rita M. Kramer, Kendrea D. Knight, Laura Spruill, Lourdes M. Nogueira, Bradley A. Krisanits, Marian H. Taylor, Amanda C. La Rue, Michael B. Lilly, Stefan Ambs, King Chan, Tonya F. Turner, Heidi Varner, Shweta Singh, Jaime Uribarri, Elizabeth Garrett-Mayer, Kent E. Armeson, Ebony J. Hilton, Mark Clair, Victoria J. Findlay, Lindsay L. Peterson, Gayenell Magwood, David P. Turner. Lifestyle-associated advanced glycation end products are elevated in ER+ positive breast cancer patients, alter response to therapy, and can be targeted by lifestyle intervention [abstract]. In: Proceedings of the Eleventh AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2018 Nov 2-5; New Orleans, LA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2020;29(6 Suppl):Abstract nr C024.
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Walter KR, Ford ME, Gregoski MJ, Kramer RM, Knight KD, Spruill L, Nogueira LM, Krisanits BA, Phan V, La Rue AC, Lilly MB, Ambs S, Chan K, Turner TF, Varner H, Singh S, Uribarri J, Garrett-Mayer E, Armeson KE, Hilton EJ, Clair MJ, Taylor MH, Abbott AM, Findlay VJ, Peterson LL, Magwood G, Turner DP. Advanced glycation end products are elevated in estrogen receptor-positive breast cancer patients, alter response to therapy, and can be targeted by lifestyle intervention. Breast Cancer Res Treat 2018; 173:559-571. [PMID: 30368741 PMCID: PMC6394600 DOI: 10.1007/s10549-018-4992-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/03/2018] [Indexed: 12/18/2022]
Abstract
Purpose Lifestyle factors associated with personal behavior can alter tumor-associated biological pathways and thereby increase cancer risk, growth, and disease recurrence. Advanced glycation end products (AGEs) are reactive metabolites produced endogenously as a by-product of normal metabolism. A Western lifestyle also promotes AGE accumulation in the body which is associated with disease phenotypes through modification of the genome, protein crosslinking/dysfunction, and aberrant cell signaling. Given the links between lifestyle, AGEs, and disease, we examined the association between dietary-AGEs and breast cancer. Methods We evaluated AGE levels in bio-specimens from estrogen receptor-positive (ER+) and estrogen receptor-negative (ER−) breast cancer patients, examined their role in therapy resistance, and assessed the ability of lifestyle intervention to reduce circulating AGE levels in ER+ breast cancer survivors. Results An association between ER status and AGE levels was observed in tumor and serum samples. AGE treatment of ER+ breast cancer cells altered ERα phosphorylation and promoted resistance to tamoxifen therapy. In a proof of concept study, physical activity and dietary intervention was shown to be viable options for reducing circulating AGE levels in breast cancer survivors. Conclusions There is a potential prognostic and therapeutic role for lifestyle derived AGEs in breast cancer. Given the potential benefits of lifestyle intervention on incidence and mortality, opportunities exist for the development of community health and nutritional programs aimed at reducing AGE exposure in order to improve breast cancer prevention and treatment outcomes. Electronic supplementary material The online version of this article (10.1007/s10549-018-4992-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Katherine R Walter
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - Marvella E Ford
- Department of Public Health Sciences, MUSC, Charleston, SC, USA. .,Hollings Cancer Center, MUSC, Charleston, SC, USA. .,James E. Clyburn Research Center Medical University of South Carolina, Charleston, SC, 29425, USA.
| | - Mathew J Gregoski
- Department of Exercise Science, College of Arts and Sciences, Campbell University, Buies Creek, NC, USA
| | | | | | - Laura Spruill
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - Lourdes M Nogueira
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - Bradley A Krisanits
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - Van Phan
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - Amanda C La Rue
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA.,Hollings Cancer Center, MUSC, Charleston, SC, USA.,Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC, USA
| | - Michael B Lilly
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - Stefan Ambs
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - King Chan
- Cancer Research Technology Program, Leidos Biomedical Research, Frederick National Laboratory, Frederick, MD, USA
| | | | - Heidi Varner
- Department of Public Health Sciences, MUSC, Charleston, SC, USA
| | - Shweta Singh
- Department of Public Health Sciences, MUSC, Charleston, SC, USA
| | - Jaime Uribarri
- Department of Medicine/Renal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Elizabeth Garrett-Mayer
- Department of Public Health Sciences, MUSC, Charleston, SC, USA.,Hollings Cancer Center, MUSC, Charleston, SC, USA
| | - Kent E Armeson
- Department of Public Health Sciences, MUSC, Charleston, SC, USA.,Hollings Cancer Center, MUSC, Charleston, SC, USA
| | - Ebony J Hilton
- Department of Anesthesia and Perioperative Medicine, MUSC, Charleston, SC, USA
| | - Mark J Clair
- Department of Medicine, Division of Cardiology, MUSC, Charleston, SC, USA
| | - Marian H Taylor
- Department of Medicine, Division of Cardiology, MUSC, Charleston, SC, USA
| | | | - Victoria J Findlay
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA.,Department of Public Health Sciences, MUSC, Charleston, SC, USA
| | | | | | - David P Turner
- Department of Pathology & Laboratory Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA. .,Department of Public Health Sciences, MUSC, Charleston, SC, USA. .,James E. Clyburn Research Center Medical University of South Carolina, Charleston, SC, 29425, USA.
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Abstract
OBJECTIVE: To report a case of rhabdomyolysis and acute hepatitis associated with the coadministration of atorvastatin and diltiazem. CASE SUMMARY: A 60-year-old African American man with a significant past medical history presented to the emergency department with acute renal failure secondary to rhabdomyolysis. In addition, liver enzymes were elevated to greater than 3 × normal. The only change in medication was the initiation of diltiazem 3 weeks earlier for atrial fibrillation to a complicated medication regimen that included atorvastatin. DISCUSSION: Rhabdomyolysis has been reported in patients receiving hydroxymethylglutaryl coenzyme A (HMG-CoA) reductase inhibitors when coadministered with agents that may inhibit their metabolism. Atorvastatin is the most potent of this class of agents currently available and is commonly used in the treatment of hyperlipidemia. Rhabdomyolysis resulting from the drug interaction between diltiazem and other HMG-CoA reductase inhibitors has been described in the literature. However, no report has specifically associated this adverse event with atorvastatin and diltiazem. We describe a patient with a complex medication regimen who was admitted for rhabdomyolysis and accompanying acute renal failure, along with acute hepatitis, thought to be secondary to a drug interaction between atorvastatin and diltiazem. CONCLUSIONS: While optimizing the patient's lipid profile should be the primary factor in choosing one statin over another, the potential for drug interactions requires close attention. All patients beginning HMG-CoA reductase inhibitor therapy should be counseled regarding the signs and symptoms of muscle injury; particular attention should be paid to those patients who are taking medications that may interact.
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Affiliation(s)
- John J Lewin
- Critical Care Pharmacy Practice, College of Pharmacy, Medical University of South Carolina, Charleston, SC, USA.
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Gianoukakis AG, Flores NM, Pelletier CL, DiBonaventura M, Forsythe A, Wolfe G, Rege J, Taylor MH. Treatment Patterns and Health Outcomes Among Patients with Radioiodine-Refractory Differentiated Thyroid Cancer in the United States and Western Europe. Value Health 2014; 17:A614. [PMID: 27202148 DOI: 10.1016/j.jval.2014.08.2159] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | | | | | | | | | - G Wolfe
- Kantar Health, New York, NY, USA
| | - J Rege
- Eisai Inc, Woodcliff Lake, NJ, USA
| | - M H Taylor
- Oregon Health & Science University, Division of Hematology & Medical Oncology, Portland, OR, USA
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Abstract
Heart disease, either clinically apparent or silent, is a frequent complication of systemic sclerosis (SSc, scleroderma) and may affect both patients with diffuse cutaneous and limited cutaneous SSc. The availability of more sensitive modalities has led to an increased awareness of scleroderma heart disease, which often involves the pericardium, myocardium, and cardiac conduction system. This awareness of cardiac involvement requires attention and interventions led by internists, cardiologists, and rheumatologists. Although no specific therapy exists for scleroderma heart disease, early recognition of the presence and type of scleroderma heart disease may lead to more effective management of patients with scleroderma.
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Affiliation(s)
- John L Parks
- Division of Cardiology, Medical University of South Carolina, 96 Jonathan Lucas Street, Charleston, SC 29425, USA
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Priester R, Bunting T, Usher B, Chiaramida S, Taylor MH, Gregg D, Sturdivant JL, Leman RB, Wharton JM, Gold MR. Role of transesophageal echocardiography among patients with atrial fibrillation undergoing electrophysiology testing. Am J Cardiol 2009; 104:1256-8. [PMID: 19840572 DOI: 10.1016/j.amjcard.2009.06.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 06/04/2009] [Accepted: 06/04/2009] [Indexed: 10/20/2022]
Abstract
External or internal shocks administered to terminate ventricular arrhythmias as a part of electrophysiology or implantable cardioverter-defibrillator testing, can inadvertently cardiovert atrial fibrillation (AF). Moreover, anticoagulation therapy is often withheld in these patients in anticipation of an invasive procedure. The risk of embolic events during these procedures has not been well described. Accordingly, the present study was a prospective evaluation of the incidence of left atrial (LA) thrombus and AF cardioversion among patients undergoing ventricular arrhythmia assessment. Transesophageal echocardiography was routinely performed on 44 consecutive patients in AF with subtherapeutic anticoagulation undergoing electrophysiology or implantable cardioverter-defibrillator testing. Arrhythmia induction was not performed when LA thrombus was present. The incidence and clinical predictors of thrombus, the inadvertent cardioversion of AF, and adverse events related to the procedure were assessed during the subsequent 4 to 6 weeks. Left atrial thrombus was observed in 12 patients (27%). Sinus rhythm was restored in 29 patients (91%), at least transiently, who underwent testing with a shock delivered. No adverse neurologic or hemorrhagic complications were observed. Univariate analysis identified no predictors of LA thrombus or cardioversion to sinus rhythm. In conclusion, LA thrombus and cardioversion to sinus rhythm are common among patients with AF undergoing an evaluation of ventricular arrhythmias. Transesophageal echocardiography performed before the procedure in patients with subtherapeutic anticoagulation is warranted to minimize embolic complications. This strategy appears to be a safe method to guide diagnostic testing in this patient population.
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Stelts S, Taylor MH, Nappi J, Van Bakel AB. Mesalamine-associated hypersensitivity myocarditis in ulcerative colitis. Ann Pharmacother 2008; 42:904-5. [PMID: 18430794 DOI: 10.1345/aph.1k288] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Beall AD, Nietert PJ, Taylor MH, Mitchell HC, Shaftman SR, Silver RM, Smith EA, Bolster MB. Ethnic disparities among patients with pulmonary hypertension associated with systemic sclerosis. J Rheumatol 2007; 34:1277-82. [PMID: 17516621] [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] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
OBJECTIVE To examine a cohort of patients with systemic sclerosis (SSc) and pulmonary hypertension (PH) for ethnic disparities in clinical presentation, disease detection, or management. METHODS Encounters of patients with SSc seen at the Medical University of South Carolina were recorded in a computerized database from November 1997 through January 2004. Patients were evaluated for discrepancy in disease manifestation and treatment. Evaluation criteria included patient ethnicity (by self report), age, disease duration from onset of first non-Raynaud's symptom, presence or absence of PH, incidence of diastolic dysfunction and left ventricular hypertrophy among patients with PH, severity of interstitial lung disease, and treatment course. RESULTS African Americans were more likely than Caucasians to have diffuse cutaneous SSc (dcSSc) (69.9% vs 42.9%, p < 0.001) and they presented with PH (defined as right ventricular systolic pressure > 40 mm Hg by echocardiogram or mean pulmonary artery pressure > 25 mm Hg by right heart catheterization (RHC) at a younger age (60.9 yrs vs 49.0 yrs, p < 0.001). There were no ethnic disparities in time from onset of the first non-Raynaud's symptom to detection of PH, method of PH detection, or treatment modalities. Patients with PH were more likely to have diastolic dysfunction than those without PH (52.3% vs 35.9%, p = 0.011). CONCLUSION In this cohort of patients, African Americans were more likely to have dcSSc. Among patients with PH, African Americans presented at a younger age than their Caucasian counterparts. Incidence of diastolic dysfunction was higher in the PH population. There were no significant ethnic disparities in time of progression to PH or in treatment modalities employed in our cohort.
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Affiliation(s)
- Ashley D Beall
- Division of Rheumatology, Medical University of South Carolina, Charleston, South Carolina 29425-2229, USA.
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Graham EM, Bandisode VM, Atz AM, Kline CH, Taylor MH, Ikonomidis JS. Percutaneous occlusion of a pseudoaneurysm evolving after homograft aortic valve and root replacement with the Amplatzer muscular ventricular septal defect occluder. J Thorac Cardiovasc Surg 2006; 131:914-6. [PMID: 16580455 DOI: 10.1016/j.jtcvs.2005.11.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2005] [Accepted: 11/15/2005] [Indexed: 11/22/2022]
Affiliation(s)
- Eric M Graham
- Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, SC 29425, USA
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Abstract
SUMMARYThe influence of temperature, size and season on the sounds produced by the sonic muscles of the weakfish Cynoscion regalis are categorized and used to formulate a hypothesis about the mechanism of sound generation by the sonic muscle and swimbladder. Sounds produced by male weakfish occur at the time and location of spawning and have been observed in courtship in captivity. Each call includes a series of 6-10 sound pulses, and each pulse expresses a damped, 2-3 cycle acoustic waveform generated by single simultaneous twitches of the bilateral sonic muscles. The sonic muscles triple in mass during the spawning season, and this hypertrophy is initiated by rising testosterone levels that trigger increases in myofibrillar and sarcoplasmic cross-sectional area of sonic muscle fibers. In response to increasing temperature, sound pressure level (SPL), dominant frequency and repetition rate increase, and pulse duration decreases. Likewise, SPL and pulse duration increase and dominant frequency decreases with fish size. Changes in acoustic parameters with fish size suggest the possibility that drumming sounds act as an `honest' signal of male fitness during courtship. These parameters also correlate with seasonally increasing sonic muscle mass. We hypothesize that sonic muscle twitch duration rather than the resonant frequency of the swimbladder determines dominant frequency. The brief (3.5 ms), rapidly decaying acoustic pulses reflect a low-Q, broadly tuned resonator, suggesting that dominant frequency is determined by the forced response of the swimbladder to sonic muscle contractions. The changing dominant frequency with temperature in fish of the same size further suggests that frequency is not determined by the natural frequency of the bladder because temperature is unlikely to affect resonance. Finally, dominant frequency correlates with pulse duration (reflecting muscle twitch duration),and the inverse of the period of the second cycle of acoustic energy approximates the recorded frequency. This paper demonstrates for the first time that the dominant frequency of a fish sound produced by a single muscle twitch is apparently determined by the velocity of the muscle twitch rather than the natural frequency of the swimbladder.
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Affiliation(s)
- M A Connaughton
- Washington College, Department of Biology, 300 Washington Avenue, Chestertown, MD 21620, USA.
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Taylor MH, McFadden JA, Bolster MB, Silver RM. Ulnar artery involvement in systemic sclerosis (scleroderma). J Rheumatol 2002; 29:102-6. [PMID: 11824945] [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: 02/23/2023]
Abstract
OBJECTIVE Microvascular disease is one of the hallmarks of systemic sclerosis (SSc, scleroderma), but macrovascular involvement also exists in some patients. Patients with SSc may have severe Raynaud's phenomenon (RP) characterized by refractory digital ulcerations. We investigated if large artery involvement, that is, ulnar artery occlusion, has a role in the development of refractory digital ulcerations, and if both screening for this involvement and revascularization of the ulnar artery occlusive disease may improve digital ulcer healing. METHODS A retrospective chart review was performed of 15 patients with SSc, all of whom had severe RP and digital ulceration, together with a positive Allen test and ulnar artery occlusive disease documented by angiography. RESULTS Women outnumbered men 2:1, with limited disease predominating (7), 5 patients having diffuse cutaneous disease and 3 overlap syndromes. All patients had positive antinuclear antibody and capillary microscopy findings consistent with SSc. Antiphospholipid antibodies were present in 4 of 6 patients tested. Tobacco use was seen in 5 patients, only 2 of whom were current smokers. All patients failed conventional medical therapy (nitrates, calcium channel blockers, antiplatelet agents) for RP and digital ulceration. Only 1/8 patients improved with stellate ganglion block, and one patient had no improvement following digital sympathectomy. Eight patients underwent ulnar artery revascularization combined with digital sympathectomy, and 8 experienced dramatic improvement in RP and healing of digital ulcers. CONCLUSION An Allen test should be performed routinely on all SSc patients with severe RP and refractory digital ulceration to investigate the possibility of ulnar artery occlusive disease. If suspected ulnar artery occlusion is confirmed by angiography or ultrasonography, ulnar artery revascularization with or without digital sympathectomy should be considered in patients who fail conventional medical therapy.
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Affiliation(s)
- Marian H Taylor
- Department of Medicine, Medical University of South Carolina, Charleston 29425, USA
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Taylor MH, Frankis MB. Community policies for prevention and response to sudden cardiac death: role of screening initiatives and public access defibrillators. JOURNAL OF THE SOUTH CAROLINA MEDICAL ASSOCIATION (1975) 2001; 97:435-8. [PMID: 11688315] [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] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- M H Taylor
- MUSC, Dept. of Medicine, Division of Cardiology, P.O. Box 250623, Charleston, SC 29425, USA
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Abstract
The teaching of preventive medicine in the medical school curriculum occurs both in independent and in interdisciplinary courses and units. A survey was conducted to examine the changes in preventive medicine context, content, and allotted hours that have occurred in the transition from the traditional Flexnerian curriculum to the more interdisciplinary, centrally controlled curriculum. Data on medical school curricula for 1990-91, 1993-94, 1995-96, and 1998-99 were examined for the 126 U.S. and 16 Canadian medical schools. By 1998-99, 35 schools moving to the new interdisciplinary format had retained preventive medicine teaching as a separate course, although the courses usually had incorporated topics that went beyond the traditional ones. In another 35 schools, preventive medicine hours had been lost in the transition; but in 25 of these new courses it was clear that preventive medicine played a very significant role. It can be assumed that the lost hours were more than replaced as preventive medicine concepts permeated these courses. Of greatest importance were the hallmark courses of the six nontraditional curricula that had designated preventive medicine a major-theme course. However, at ten schools, preventive medicine listings disappeared in the move to nontraditional curricula. Preventive medicine educators must step forward to use curricular restructuring to expand the role of preventive medicine in the curricula of their institutions, whether in stand-alone or in interdisciplinary courses. The goal, as always, is to provide future physicians with the knowledge and skills they need to provide proper care to their patients.
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Affiliation(s)
- A M McClary
- Department of Preventive Medicine, University of Tennessee College of Medicine, Memphis 38163, USA
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Connaughton MA, Taylor MH, Fine ML. Effects of fish size and temperature on weakfish disturbance calls: implications for the mechanism of sound generation. J Exp Biol 2000; 203:1503-12. [PMID: 10751166 DOI: 10.1242/jeb.203.9.1503] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.7] [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: 11/20/2022]
Abstract
To categorize variation in disturbance calls of the weakfish Cynoscion regalis and to understand their generation, we recorded sounds produced by different-sized fish, and by similar-sized fish at different temperatures, as well as muscle electromyograms. Single, simultaneous twitches of the bilateral sonic muscles produce a single sound pulse consisting of a two- to three-cycle acoustic waveform. Typical disturbance calls at 18 degrees C consist of trains of 2–15 pulses with a sound pressure level (SPL) of 74 dB re 20 microPa at 10 cm, a peak frequency of 540 Hz, a repetition rate of 20 Hz and a pulse duration of 3.5 ms. The pulse duration suggests an incredibly short twitch time. Sound pressure level (SPL) and pulse duration increase and dominant frequency decreases in larger fish, whereas SPL, repetition rate and dominant frequency increase and pulse duration decreases with increasing temperature. The dominant frequency is inversely related to pulse duration and appears to be determined by the duration of muscle contraction. We suggest that the lower dominant frequency of larger fish is caused by a longer pulse (=longer muscle twitch) and not by the lower resonant frequency of a larger swimbladder.
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Affiliation(s)
- M A Connaughton
- Washington College, Department of Biology, Chestertown, MD 21620, USA.
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Leiserowitz GS, Russell AH, Kinney WK, Smith LH, Taylor MH, Scudder SA. Prophylactic chemoradiation of inguinofemoral lymph nodes in patients with locally extensive vulvar cancer. Gynecol Oncol 1997; 66:509-14. [PMID: 9299268 DOI: 10.1006/gyno.1997.4804] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [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: 02/05/2023]
Abstract
OBJECTIVE Primary surgical resection of locally advanced squamous cancer of the vulva may compromise the integrity of important midline structures such as the anus, clitoris, urethra, and vagina. Chemoradiation (synchronous radiation and cytotoxic chemotherapy) has been used as alternative initial treatment which may serve as definitive management for some patients, or may reduce the scope and functional sequelae of subsequent surgery in others. Inguinofemoral node dissection is associated with substantial risk of both acute and late morbidity, prompting consideration of elective inclusion of groin nodes within the irradiated volume and deletion of subsequent groin surgery. Concern that disease relapse in the groins is potentially fatal suggested the prudence of formal outcome assessment of our recent experience with prophylactic treatment of clinically uninvolved groin nodes in the context of concurrent chemoradiation for locally advanced primary vulvar cancer. METHODS A review was conducted of 23 previously untreated patients with locally advanced squamous cancer of the vulva (2 T2, 20 T3, 1 T4) and clinically uninvolved groin nodes (1969 FIGO stages 14 N0, 4 N1, and 5 N2 with negative node biopsies) who were treated since 1987 with chemoradiation administered to a volume electively including bilateral inguinofemoral nodes. These patients did not undergo subsequent groin surgery. RESULTS With follow-up from 6 to 98 months (mean, 45.3 months; median, 42 months), no patient has failed in the prophylactically irradiated inguinofemoral nodes. No patient has developed lymphedema, vascular insufficiency, or neurological injury in a lower extremity, and no patient has experienced aseptic necrosis of a femur. CONCLUSIONS Elective irradiation of the groin nodes in the context of initial chemoradiation for locally advanced vulvar cancer is an effective therapy associated with acceptable acute toxicity and minimal late sequelae. It constitutes a sensible alternative to groin dissection in this patient population.
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Affiliation(s)
- G S Leiserowitz
- Department of Obstetrics and Gynecology, University of California, Sacramento, California 95816, USA
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Connaughton MA, Fine ML, Taylor MH. The effects of seasonal hypertrophy and atrophy on fiber morphology, metabolic substrate concentration and sound characteristics of the weakfish sonic muscle. J Exp Biol 1997; 200:2449-57. [PMID: 9343856 DOI: 10.1242/jeb.200.18.2449] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.7] [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: 10/21/2022]
Abstract
Male weakfish Cynoscion regalis possess highly specialized, bilateral, striated sonic muscles used in sound production associated with courtship. Androgen-driven hypertrophy of the muscles during the late spring spawning period results in a tripling of sonic muscle mass followed by post-spawning atrophy. This study examined the morphological and biochemical changes underlying seasonal changes in sonic muscle mass and the functional effects of these on contraction as measured by sound production. Sonic muscle fiber cross-sectional area (CSA) increased significantly during the period of hypertrophy and then decreased by nearly 60%. Both the CSA of the contractile cylinder and that of the peripheral sarcoplasm decreased significantly by late summer, with the peripheral ring of sarcoplasm virtually disappearing. Muscle protein content followed a similar trend, suggesting a major loss of structural elements during atrophy. Muscle glycogen and lipid content decreased precipitously in early June during the period of maximal sound production. Sound pressure level increased and sound pulse duration decreased with increasing sonic muscle mass, indicating that sonic muscle fibers contract with greater force and shorter duration during the spawning season. Neither the pulse repetition rate nor the number of pulses varied seasonally or with muscle mass, suggesting that the effects of steroids on the acoustic variables are more pronounced peripherally than in the central nervous system. Seasonal sonic muscle hypertrophy, therefore, functions as a secondary sexual characteristic that maximizes vocalization amplitude during the spawning period.
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Affiliation(s)
- M A Connaughton
- College of Marine Studies, University of Delaware, Newark 19716, USA.
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17
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Abstract
Three testosterone (T) implant experiments were carried out to investigate the hormonal control of seasonal hypertrophy in the sound producing, or sonic, muscles of the weakfish Cynoscion regalis. The first experiment examined the role of T in the seasonal increase in sonic muscle mass noted in adult male weakfish during the spring and summer spawning period. Specimens held over-winter were implanted with T or vehicle prior to the natural spawning season. The sonic muscle mass of the T-implanted group increased two and a half-fold over a period of 3 weeks, while that of the sham-implanted group did not change. At the end of the experiment, the cross-sectional area of the sonic muscle fibers in the T-implanted group averaged 500 microns 2, while that of the sham-implanted group averaged 300 microns 2. In a second experiment, the elevated sonic muscle mass of spawning male weakfish was sustained with pharmacological levels of plasma T for a period of 4 months following the spawning season. The sonic muscle mass of the sham-implanted group decreased to typical postseason values. In a third experiment, male and female age-0 weakfish were held over-winter and then implanted with T in advance of their first natural spawning season. The sonic muscles of the T-treated male specimens attained twice the mass of those of the sham-implanted male specimens in 3 weeks time. No sonic muscle development was noted in any of the female specimens.
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Affiliation(s)
- M A Connaughton
- College of Marine Studies, University of Delaware, Newark 19716, USA
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18
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Sartori PC, Taylor MH, Stevens MC, Darbyshire PJ, Mann JR. Treatment of childhood acute myeloid leukaemia using the BFM-83 protocol. Med Pediatr Oncol 1993; 21:8-13. [PMID: 8426581 DOI: 10.1002/mpo.2950210103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Thirty children presenting with acute nonlymphoblastic leukaemia from June 1984 to December 1989 were treated at one UK centre using a West German protocol, AML-BFM-83. This consisted of Induction, an intensive outpatient-based Consolidation regimen with seven different drugs and cranial irradiation, and Continuation therapy with thioguanine and cytosine arabinoside for 2 years with additional Adriamycin in the first year. Twenty-five children achieved complete remission (83%). There were two early deaths from haemorrhage and infection and three from Induction failure. After a median follow-up time of 60 months, nine relapses have occurred, all in the bone marrow. Life table analysis revealed a probability for survival at 5 years of 47%, event-free survival 43%, and event-free interval 50%. Median bed occupancy for chemotherapy and toxicity was 41 days, with median hospital stays of 29 days for Induction, 11 days for Consolidation and less than 1 day for Continuation. This data suggests that long-term remissions can be achieved in just under half of children with acute nonlymphoblastic leukaemia while creating only modest demands on inpatient resources.
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Affiliation(s)
- P C Sartori
- Department of Haematology, Birmingham Children's Hospital, England
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19
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Krag DN, Haseman MK, Ford P, Smith L, Taylor MH, Schneider P, Goodnight JE. Gamma probe location of 111indium-labeled B72.3: an extension of immunoscintigraphy. J Surg Oncol 1992; 51:226-30. [PMID: 1434652 DOI: 10.1002/jso.2930510405] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Eight colorectal and 5 ovarian cancer patients were evaluated with preoperative immunoscintigraphy and intraoperative gamma probe detection of 111indium-labeled monoclonal antibody B72.3. Immunoscintigraphy detected the presence of tumor in every patient shown to have tumor at surgery. There was one false-positive scan. A total of 21 pathologically verified lesions were identified at surgery in the 11 patients with tumor. Immunoscintigraphy localized 12 (57%) and intraoperative gamma probe detection located 17 (81%) of the lesions. Intraoperative probe detection located 6 of 8 lesions smaller than 1 cm and 3 lesions that were not identified on initial surgical exploration. The gamma probe offers information that is complementary to immunoscintigraphy in that (1) it aids the surgeon in locating intra- and extra-abdominal lesions previously identified by immunoscintigraphy, (2) it locates lesions too small to be seen by immunoscintigraphy alone, (3) it locates lesions that otherwise might be missed at surgery, and (4) it provides objective evidence for adequacy of surgical resection of cancer in the abdominal cavity.
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Affiliation(s)
- D N Krag
- Departments of Surgery, University of California, Davis, Sacramento
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20
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Russell AH, Mesic JB, Scudder SA, Rosenberg PJ, Smith LH, Kinney WK, Townsend DE, Trelford JD, Taylor MH, Zukowski CL. Synchronous radiation and cytotoxic chemotherapy for locally advanced or recurrent squamous cancer of the vulva. Gynecol Oncol 1992; 47:14-20. [PMID: 1427394 DOI: 10.1016/0090-8258(92)90068-t] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.5] [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: 12/27/2022]
Abstract
Between July 1987 and September 1991 a program of external beam radiation and synchronous, radiopotentiating chemotherapy was employed to treat 25 women with locoregionally advanced or locoregionally recurrent squamous cancer of the vulva. Of 18 previously untreated patients, 1 was Stage II, 10 were Stage III, 6 were Stage IVA, and 1 was Stage IVB. Reasons for patient referral for nonsurgical management included the presence of initially unresectable disease (5 patients), disease extent which would have necessitated partial or total exenteration if treated surgically (9 patients), disease extent predictive of inadequate surgical margins (less than 1 cm gross margin) if treated by less than exenterative surgery (8 patients), and severe comorbid illness precluding surgical management (3 patients). Complete clinical response was obtained in 16 of 18 previously untreated patients (89%) and in 4 of 7 patients with recurrent disease following vulvar surgery (57%). Of 20 patients achieving a complete clinical response, 3 patients have relapsed within the irradiated volume at 11, 38, and 48 months following completion of treatment. Fourteen patients remain alive and continuously cancer free from 2-52 months after completion of treatment (median follow-up 24 months). This experience suggests that initial management with radiation and chemotherapy may offer some patients with locally advanced squamous cancer of the vulva an alternative to exenterative surgery and may hold curative potential for some patients with surgically unresectable or medically inoperable disease.
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Affiliation(s)
- A H Russell
- Radiation Oncology Center, Sutter Memorial Hospital, Sacramento, California
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21
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Labart WA, Barkmeier WW, Taylor MH. Bracket retention after 15-second acid conditioning. J Clin Orthod 1988; 22:254-5. [PMID: 3075212] [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: 01/04/2023]
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Bradford CS, Taylor MH. Semilunar changes in estradiol and cortisol coincident with gonadal maturation and spawning in the killifish Fundulus heteroclitus. Gen Comp Endocrinol 1987; 66:71-8. [PMID: 3582946 DOI: 10.1016/0016-6480(87)90351-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Radioimmunoassay techniques were used to measure estradiol-17 beta (E2) and cortisol in the serum and ovarian fluid of Fundulus heteroclitus throughout complete semilunar spawning cycles. The cyclic nature of spawning activity was confirmed by monitoring the gonadosomatic index and noting the times at which ovulated eggs were found within the ovarian lumen. Levels of serum E2, ovarian fluid E2, and serum cortisol all exhibited cycles which paralleled the semilunar cycle of gonadal maturity and spawning in this euryhaline killifish. Elevations of serum cortisol were temporally associated with ovulation, whereas ovarian fluid E2 levels peaked several days prior to ovulation. Serum E2 remained elevated after ovarian fluid E2 levels had returned to baseline. Cortisol concentrations in ovarian fluid did not cycle and no correlation was apparent between serum cortisol and glucose concentrations.
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Greeley MS, Calder DR, Taylor MH, Hols H, Wallace RA. Oocyte maturation in the mummichog (Fundulus heteroclitus): effects of steroids on germinal vesicle breakdown of intact follicles in vitro. Gen Comp Endocrinol 1986; 62:281-9. [PMID: 3781226 DOI: 10.1016/0016-6480(86)90118-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The effects of several steroids on the maturation of follicle-enclosed oocytes of the mummichog Fundulus heteroclitus in vitro were examined. At a relatively high concentration (1.0 microgram/ml), a number of different steroids, including pregnenolone, 17 alpha-hydroxypregnenolone, corticosterone, cortisol, 11-deoxycorticosterone, 11-deoxycortisol, androstenedione, testosterone, progesterone, 17 alpha-hydroxyprogesterone, 20 beta-dihydroprogesterone, and 17 alpha-hydroxy-20 beta-dihydroprogesterone, were able to induce germinal vesicle breakdown (GVBD) in prematuration oocytes. Cholesterol, 17 beta-estradiol, 11-ketotestosterone, and 11 beta-hydroxytestosterone were totally ineffective. In general, 11-oxysteroids tended to be less effective than their 11-deoxysteroid counterparts. Two 20 beta-dihydroprogestins--17 alpha-hydroxy-20 beta-dihydroprogesterone and 20 beta-dihydroprogesterone--were the most potent maturation-inducing steroids, initiating 50% GVBD at 1 ng/ml in follicles obtained from ovaries containing mature or maturing follicles in vivo, or at 2.5-4.0 ng/ml in follicles from ovaries lacking mature or maturing oocytes in vivo. These results are consistent with several previous studies involving salmonids and various other teleosts, and suggest a possible physiological role for a 20 beta-dihydroprogestin in the resumption of meiotic maturation in F. heteroclitus.
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Abstract
Fourteen patients with malignant ovarian germ cell tumors were treated with vinblastine, bleomycin, and cisplatin. A complete clinical response was achieved in all 14 patients; however, 1 patient had small macroscopic disease present at second-look laparotomy. One patient died of bleomycin pulmonary toxicity. The remaining 13 patients are alive and free of disease from 20 months to 8 years and 8 months after initial diagnosis. Serum alpha-fetoprotein and beta-human chorionic gonadotropin levels were monitored in all patients and were found to be reliable indicators of response to treatment and disease status. The uninvolved ovary was preserved in seven patients without compromising the response to treatment, and one patient subsequently became pregnant. Vinblastine, bleomycin, and cisplatin chemotherapy appears to be a safe, effective combination and is recommended as the primary treatment of choice in the management of patients with malignant ovarian germ cell tumors.
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Abstract
We have presented a case in which 3.7-year-old patient exhibited calcific metamorphosis of a maxillary primary central incisor at the initial visit, with subsequently internal resorption developing in the same tooth. This case underscores the need for careful monitoring of traumatized teeth that have undergone calcific metamorphosis.
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Andryjowicz E, Qizilbash AH, DePetrillo AD, O'Connell GJ, Taylor MH. Adenocarcinoma in a cecal neovagina--complication of irradiation: report of a case and review of literature. Gynecol Oncol 1985; 21:235-9. [PMID: 3988137 DOI: 10.1016/0090-8258(85)90258-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A 42-year-old woman is presented with her fifth primary pelvic carcinoma, occurring in an irradiated cecal neovagina. Previously reported neovaginal carcinomas are reviewed. The possible etiologies are examined. This is the first case of radiation-induced carcinoma arising in a cecal neovagina. Long-term follow-up is important in all patients with neovaginas.
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Taylor MH, Peterson DS. Effect of length and number of appointments on children's behavior in a dental setting. ASDC J Dent Child 1983; 50:353-7. [PMID: 6580298] [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: 01/20/2023]
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Taylor MH, Peterson DS. Effect of digit-sucking habits on root morphology in primary incisors. Pediatr Dent 1983; 5:61-3. [PMID: 6574442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Taylor MH, Moyer IN, Peterson DS. Effect of appointment time, age, and gender on children's behavior in a dental setting. ASDC J Dent Child 1983; 50:106-10. [PMID: 6573347] [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: 01/20/2023]
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Peterson DS, Taylor MH. An educational program to assist dental students in admission to hospital-based advanced educational programs. Part 2: Preparing for the personal interview. Spec Care Dentist 1982; 2:209-11. [PMID: 6959363 DOI: 10.1111/j.1754-4505.1982.tb00057.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: 01/22/2023]
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Peterson DS, Taylor MH. An educational program to assist dental students in admission to hospital-based advanced educational programs. Part 1: Making a career decision and preparing for the application process. Spec Care Dentist 1982; 2:167-71. [PMID: 6957018 DOI: 10.1111/j.1754-4505.1982.tb00044.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: 01/22/2023]
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Leach GJ, Taylor MH. Seasonal measurements of serum glucose and serum cortisol in a natural population of Fundulus heteroclitus L. Comp Biochem Physiol A Comp Physiol 1977; 56:217-23. [PMID: 11937 DOI: 10.1016/0300-9629(77)90188-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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36
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Taylor MH. Anger: threat to managerial control. Health Serv Manager 1976; 9:8-10. [PMID: 1028714] [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: 12/25/2022]
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37
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Howard E, Olton DS, Taylor MH. Polydipsia in adult mice and rats given corticosterone in infancy: accentuation by variable interval food reinforcement. J Comp Physiol Psychol 1974; 87:120-5. [PMID: 4415115 DOI: 10.1037/h0036569] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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38
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