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1.
Plast Surg (Oakv) ; 31(2): 169-176, 2023 May.
Article in English | MEDLINE | ID: mdl-37188137

ABSTRACT

Background: The US Medical Licensing Examination (USMLE) Step 1 change to pass/fail has been met with mixed reviews, and the impact on medical student education and residency match is unknown. We surveyed medical school student affairs deans regarding their thoughts on the upcoming transition of Step 1 to pass/fail. Methods: A questionnaire was emailed to medical school deans. Deans were asked to rank the importance of the following after the Step 1 reporting change: Step 2 Clinical Knowledge (Step 2 CK), clerkship grades, letters of recommendation, personal statement, medical school reputation, class rank, Medical Student Performance Evaluation, and research. They were asked how the score change will affect curriculum, learning, diversity, and student mental health. Deans were asked to select 5 specialties they thought would be most affected. Results: Regarding perceived importance of residency applications following the scoring change, the most frequent number 1 choice was Step 2 CK. The majority of deans (93.5%, n = 43) felt that the change to pass/fail would benefit medical student education/learning environment; however, most (68.2%, n = 30) did not believe their school curriculum would change. Students applying to dermatology, neurosurgery, orthopedic surgery, ENT, and plastic surgery were felt to be most affected by the scoring change; 58.7% (n = 27) felt it would not adequately address future diversity. Conclusion: The majority of deans feel the USMLE Step 1 change to pass/fail would benefit medical student education. Deans feel that students applying to traditionally more competitive specialties (ie, programs with fewer overall residency positions available) will be most affected.


Contexte : Le changement de l'épreuve 1 de l'USMLE pour un résultat de type réussite/échec a été accueilli par des opinions variées et son impact sur la formation des étudiants en médecine et l'adéquation des résidences est inconnu. Nous avons mené une enquête auprès des doyens des affaires étudiantes des facultés de médecine pour connaître leur opinion sur la transition prochaine de l'épreuve 1 à un score réussite/échec. Méthodes : Un questionnaire a été envoyé par courriel aux doyens des facultés de médecine. Il leur a été demandé de classer l'importance des éléments suivants après la modification de déclaration des résultats de l'Épreuve 1: Épreuve 2 CK, notes d'externat, lettres de recommandation, déclaration personnelle, réputation de l'école de médecine, classement, évaluation des performances des étudiants en médecins (MSPE) et recherche. Il leur a été demandé comment le changement de notation allait affecter les programmes, l'apprentissage, la diversité et la santé mentale des étudiants. Les doyens devaient sélectionner les 5 spécialités qui, à leur avis, allaient être les plus touchées. Résultats : Pour ce qui concerne l'importance perçue des demandes de résidence après le changement de notation, le choix numéro 1 le plus fréquent a été l'épreuve 2 CK. La majorité des doyens (93,5%, n = 43) a eu le sentiment que le changement en Réussite/Échec serait bénéfique pour la formation des étudiants en médecine et leur environnement pédagogique; toutefois, la plupart d'entre eux (68,2%, n = 30) ne croyaient pas que les programmes d'études changeraient. Les étudiants faisant des demandes en dermatologie, neurochirurgie, chirurgie orthopédique, ORL, et chirurgie plastique étaient perçus comme les plus touchés par le changement de notation. Par ailleurs 58,7% des répondants (n = 27) ont estimé que cela n'aborderait pas de manière adéquate la diversité future. Conclusion : La majorité des doyens a le sentiment que le passage à une notation Réussite/Échec de l'Épreuve 1 de l'USMLE serait bénéfique à la formation des étudiants en médecine. Les doyens estiment que les étudiants faisant des demandes pour des spécialités où règne traditionnellement une plus grande concurrence (c.-à-d. les programmes avec un moins grand nombre global de postes de résidents) seront les plus touchés.

2.
Plast Reconstr Surg Glob Open ; 11(1): e4766, 2023 Jan.
Article in English | MEDLINE | ID: mdl-36655029

ABSTRACT

The Plastic Surgery Common Application (PSCA) was introduced as a free and specialty-specific application for plastic surgery applicants in the 2020-2021 cycle. Now in its second year, the PSCA is being piloted by all integrated residency programs with future plans to replace Electronic Residency Application Service (ERAS) in the 2022-2023 cycle. This study aimed to explore applicant perspectives related to the PSCA and ERAS applications. Methods: An anonymous survey was distributed to integrated plastic surgery residency applicants from the 2021-2022 application cycle. Participants were asked to provide basic demographic information, their perspectives of the PSCA, and overall application preference. Results: One hundred forty (43.1%) applicants completed the survey. Nearly, 63% of applicants responded "slightly well" or "not well at all" regarding their ability to highlight at least one aspect of their application. Forty-one percent of applicants believed ERAS best highlighted the strengths of their application compared with 27% who believed their strengths were better highlighted by the PSCA. Seventy-nine percent reported the cost savings associated with the PSCA were "very" or "extremely important." Overall, 63% of respondents reported a preference to apply with the PSCA alone. Conclusions: This is the first study to provide insight on applicants' perspectives of the PSCA. Although the majority preferred applying with the PSCA, there may be challenges with transitioning to this application solely. Future iterations of the PSCA may aim to ameliorate functionality concerns, optimize application content, and incorporate plastic surgery-specific information that may be important to selection committees.

3.
Plast Reconstr Surg ; 151(6): 907e-914e, 2023 06 01.
Article in English | MEDLINE | ID: mdl-36584304

ABSTRACT

BACKGROUND: Following the reopening of elective surgery, the authors' division transitioned from inpatient admission to same-day discharge for immediate prosthetic breast reconstruction in an effort to decrease the hospital's clinical burden and minimize potential coronavirus disease of 2019 exposure. This study aims to compare complication rates following this acute transition for patients who had inpatient and outpatient mastectomy with immediate alloplastic reconstruction. METHODS: A retrospective chart review was performed on patients who underwent mastectomy with immediate prosthetic reconstruction. The outcome of interest was 30-day morbidity. Descriptive statistics were compared for patients with outpatient and inpatient operations. Odds ratios were calculated to determine whether any preoperative factors increased odds of 30-day complications. RESULTS: A total of 115 patients were included in this study. Twenty-six patients had outpatient surgery and 89 stayed inpatient postoperatively. Same-day discharge did not significantly impact the odds of having one or more 30-day complications (OR, 0.275; 95% CI, 0.047 to 1.618; P = 0.153). Patients with complications had significantly longer median operating times [5.0 hours (interquartile range, 4.0 to 6.0 hours) versus 4.0 hours (interquartile range, 3.0 to 5.0 hours; P = 0.05), and there was a statistically significant association between length of surgery and odds of complication (OR, 1.596; 95% CI, 1.039 to 2.451; P = 0.033). Age was independently associated with increased risk of 30-day complication (OR, 1.062; 95% CI, 1.010 to 1.117; P = 0.020). CONCLUSION: The authors' findings support a continuation of same-day discharge strategy, which could decrease costs for patients and hospitals without increasing complications. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.


Subject(s)
Breast Neoplasms , COVID-19 , Humans , Female , Mastectomy , Outpatients , Retrospective Studies , Pandemics , COVID-19/epidemiology
4.
Plast Reconstr Surg Glob Open ; 10(8): e4522, 2022 Aug.
Article in English | MEDLINE | ID: mdl-36032377

ABSTRACT

Background: The COVID-19 vaccine rollout has since been followed by a gradual resumption of elective surgery. Many individuals remain cautious about visiting a hospital or clinic to undergo surgery. As plastic surgeons are starting to resume elective surgery at this time, it is important to understand the perspectives of potential patients and the concerns they may have. Methods: A survey was distributed to participants in the United States through Amazon's Mechanical Turk (mTurk) during March of 2021. Participants were surveyed regarding their views on the severity of COVID-19, vaccination status, and how much COVID-19 has affected their interest in undergoing surgery. Results: Thirty-nine percent of respondents were either no longer willing or less willing to undergo elective plastic surgery. Seventy-three percent of respondents felt comfortable going to an office for a consultation. With regards to feeling comfortable visiting a hospital, 43.4% reported they would feel safe, 36% felt they would feel safe only if they could be discharged on the same day, and 30.6% reported not feeling safe. Fifty-two percent of respondents reported feeling comfortable undergoing surgery now or within the next year. Respondents who do not think COVID-19 is still a major health issue were more likely to still want plastic surgery. Conclusion: The results of this study highlight that the majority of patients, regardless of vaccination status, currently feel comfortable undergoing elective plastic surgery, particularly in an office setting. Plastic surgeons may expect to see a return in demand for elective procedures in the coming months.

5.
J Plast Reconstr Aesthet Surg ; 75(9): 2890-2913, 2022 09.
Article in English | MEDLINE | ID: mdl-35872020

ABSTRACT

BACKGROUND: Significant improvements in sensory recovery after innervated breast reconstruction have been reported. However, surgical approaches and sensory testing methods have been widely variable. This systematic review aimed to synthesize neurotization techniques and outcomes in breast reconstruction surgery. METHODS: A comprehensive literature search of the MEDLINE, Embase, Web of Science, and Cochrane databases was conducted to identify all studies reporting outcomes of neurotization in innervated breast reconstruction. Data extracted from each study included neurotization techniques, operative times, sensory methods and outcomes, and patient-reported outcomes. RESULTS: A total of 1,350 articles were identified, and 23 articles were included for analysis. Nerve coaptation was performed in 536 breasts and 419 patients, with techniques consisting of direct coaptation (65.1% of flaps), coaptation with nerve conduit (26.3%), and coaptation with nerve allograft (8.6%). The neural component of operating time ranged from 8 to 38 min, and the pooled neurotization success rate among nine studies that reported this outcome was 90.6% (95% CI: 83.6%-96.0%). Overall, innervated breasts achieved earlier and superior sensory recovery that was more uniformly distributed throughout the flap compared to non-innervated breasts. Despite high heterogeneity between studies, all included studies supported neurotized breast reconstruction to improve the rate, quality, and magnitude of sensory recovery. CONCLUSIONS: Neurotization during breast reconstruction may be worth the investment of additional operating time to increase the prospect of high-quality sensory recovery. Further investigation with standardized sensory testing methods and patient-reported outcome tools is needed to definitively support neurotization as a standard of care in breast reconstruction surgery.


Subject(s)
Mammaplasty , Nerve Transfer , Breast/innervation , Humans , Mammaplasty/methods , Nerve Regeneration/physiology , Nerve Transfer/methods , Surgical Flaps/innervation
6.
J Plast Reconstr Aesthet Surg ; 75(9): 2920-2929, 2022 09.
Article in English | MEDLINE | ID: mdl-35753925

ABSTRACT

BACKGROUND: Traditionally, patients with breast reconstruction (BR) were hospitalized at least one day postoperatively. However, new trends suggest that outpatient surgery is a viable and safe alternative. This study aims to assess trends among patients with breast cancer who underwent outpatient mastectomy alone, with immediate BR (IBR) or delayed BR (DBR). METHODS: A retrospective analysis of the 2013-2019 ACS NSQIP® database was conducted. All women who underwent outpatient mastectomy were included in this study. The cohort was divided as follows: (1) mastectomy without BR, (2) IBR, and (3) DBR. A Cochran-Armitage test and adjusted multivariable logistic regression models were performed to evaluate linear trends over time within groups, and overall and pairwise comparisons between groups across the years, respectively. RESULTS: A total of 84,954 women were included in this study. Overall, 54.9%, 16.2%, and 28.9% underwent mastectomy without BR, IBR, and DBR, respectively. From the BR groups, the majority had implant placement. A significant difference in incidence trends between the three groups was evidenced over time (p<0.001). The greatest increase was evidenced in the IBR group and the lowest in the mastectomy without BR group. CONCLUSION: In this cohort of patients, a significant difference in linear trends was evidenced over time within and between the three groups. Our results suggest that outpatient IBR procedures are increasing in a greater proportion compared to other surgical approaches. Further studies are required to better characterize this population and comprehend the decision-making process toward a surgical procedure within each of the three groups.


Subject(s)
Breast Neoplasms , Mammaplasty , Breast Neoplasms/surgery , Female , Humans , Mammaplasty/methods , Mastectomy , Outpatients , Retrospective Studies
7.
J Reconstr Microsurg ; 38(3): 221-227, 2022 Mar.
Article in English | MEDLINE | ID: mdl-35098498

ABSTRACT

BACKGROUND: The deep inferior epigastric artery perforator (DIEP) flap has become the gold standard for autologous breast reconstruction at many institutions. Although the deep inferior epigastric artery displays significant anatomic variability in its intramuscular course, branching pattern and location of perforating vessels, the ability to preoperatively visualize and map relevant vascular anatomy has increased the efficiency, safety and reliability of the DIEP flap. While computed tomography angiography (CTA) is often cited as the preoperative imaging modality of choice for perforator flaps, more recent advances in ultrasound technology have made it an increasingly attractive alternative. METHODS: An extensive literature review was performed to identify the most common applications of ultrasound technology in the preoperative planning of DIEP flaps. RESULTS: This review demonstrated that multiple potential uses for ultrasound technology in DIEP flap reconstruction including preoperative perforator mapping, evaluation of the superficial inferior epigastric system and as a potential adjunct in flap delay procedures. Available studies suggest that ultrasound compares favorably to other widely-used imaging modalities for these indications. CONCLUSION: This article presents an in-depth review of the current applications of ultrasound in the preoperative planning of DIEP flaps and explores some potential areas for future investigation.


Subject(s)
Mammaplasty , Perforator Flap , Epigastric Arteries/surgery , Humans , Mammaplasty/methods , Perforator Flap/blood supply , Preoperative Care/methods , Reproducibility of Results , Ultrasonography
8.
Aesthet Surg J ; 42(5): 548-558, 2022 04 12.
Article in English | MEDLINE | ID: mdl-34486647

ABSTRACT

BACKGROUND: Recent evidence suggests tranexamic acid (TXA) may improve outcomes in aesthetic surgery patients. OBJECTIVES: This systematic review aimed to investigate the impact of TXA use in aesthetic plastic surgery on bleeding and aesthetic outcomes. METHODS: A systematic literature search was conducted to identify studies evaluating TXA use in aesthetic plastic surgery. The primary outcome of interest was perioperative bleeding, reported as total blood loss (TBL), ecchymosis, and hematoma formation. Meta-analyses analyzing TBL and postoperative hematoma were performed. RESULTS: Of 287 identified articles, 14 studies evaluating TXA use in rhinoplasty (6), rhytidectomy (3), liposuction (3), reduction mammaplasty (1), and blepharoplasty (1) were included for analysis. Of 820 total patients, 446 (54.4%) received TXA. Meta-analysis demonstrated TXA is associated with 26.3 mL average blood loss reduction (95% CI, -40.0 to -12.7 mL; P < 0.001) and suggested a trend toward decreased odds of postoperative hematoma with TXA use (odds ratio, 0.280; 95% CI, 0.076-1.029; P = 0.055). Heterogeneity among reporting of other outcomes precluded meta-analysis; however, 5 of 7 studies found significantly decreased postoperative ecchymosis levels within 7 days of surgery, 3 studies found statistically significant reductions in postoperative drain output, and 1 study reported significantly improved surgical site quality for patients who received TXA (P = 0.001). CONCLUSIONS: TXA is associated with decreased blood loss and a trend toward decreased hematoma formation in aesthetic plastic surgery. Its use has the potential to increase patient satisfaction with postoperative recovery and decrease costs associated with complications, including hematoma evacuation.


Subject(s)
Antifibrinolytic Agents , Surgery, Plastic , Tranexamic Acid , Antifibrinolytic Agents/adverse effects , Blood Loss, Surgical/prevention & control , Ecchymosis/chemically induced , Ecchymosis/prevention & control , Female , Hematoma/etiology , Hematoma/prevention & control , Humans , Tranexamic Acid/adverse effects
9.
J Plast Surg Hand Surg ; 56(5): 291-297, 2022 Oct.
Article in English | MEDLINE | ID: mdl-34524064

ABSTRACT

This study aimed to investigate the impact of performing neurotization during breast reconstruction on total operating time and post-operative morbidity. The 2015 through 2019 American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) databases were utilized to identify patients who underwent breast reconstruction with and without neurotization. Baseline demographics, comorbidities, operative characteristics and outcomes were examined for each group. Thirty-day complication and readmission rates were compared using univariable and multivariable logistic regressions. Of 73,507 patients identified who underwent breast reconstruction, 240 had reconstruction with neurotization. Autologous reconstruction was more prevalent for patients with neurotization (90.8% vs. 18.5%, p<.001). Average operating time was longer when neurotization was performed during both autologous (527.1 ± 152.4 vs. 414.8 ± 186.3, p<.001) and alloplastic-only reconstruction (310.9 ± 115.9 vs. 173.0 ± 94.3, p<.001). The likelihood total operating time exceeded 521 min (two standard deviations above average) increased when neurotization was performed (OR 2.464, CI 1.864-3.255, p<.001). Thirty-day complications occurred in 13.8% of patients with neurotization and 6.8% without (p<.001). Similarly, 30-day readmission rates were higher for patients with neurotization (7.5% vs. 4.2%, p<.001). However, when adjusted for comorbidities and operative characteristics, neurotization did not significantly impact 30-day complication rates (OR 0.802, CI 0.548-1.174, p=.256) or 30-day readmission rates (OR 1.352, CI 0.822-2.223, p=.077). Although neurotization during breast reconstruction increases operating time, comorbidities and procedural characteristics play a greater role in post-operative outcomes than neurotization alone.


Subject(s)
Mammaplasty , Nerve Transfer , Surgeons , Humans , Mammaplasty/adverse effects , Postoperative Complications/surgery , Quality Improvement , Retrospective Studies , Risk Factors , United States
11.
Plast Reconstr Surg ; 148(5): 825e-836e, 2021 11 01.
Article in English | MEDLINE | ID: mdl-34586097

ABSTRACT

BACKGROUND: In response to the cancellation of away rotations and the shift to virtual interviews due to the coronavirus disease of 2019 (COVID-19) pandemic, residency programs have pursued other methods of sharing program details, most notably with the use of social media. This study aimed to evaluate the extent of social media utilization in the setting of the COVID-19 pandemic by plastic surgery residency programs. METHODS: Instagram, Twitter, and Facebook accounts of plastic surgery programs, program directors, and chiefs were identified. Number of followers, total posts, and posts since March 1, 2020, were extracted. Account content was categorized as informational, social, operative, research, self-promotional, guest lecture, education, or other. Spearman's coefficient was used to determine correlations among account data. Differences among regions and program pathways were evaluated using the Kruskal-Wallis test. RESULTS: Since March 1, 2020, 17 Instagram, five Twitter, and three Facebook accounts have been created. Instagram was most widely used and followed (1720 posts, 1235.7 ± 735.9 followers) compared with Twitter (722 tweets, 325.6 ± 451.0 followers) and Facebook (430 posts, 338.3 ± 363.3 followers). Although the majority of content was informational (45.1 percent), Instagram contained more social content (21 percent), Twitter contained more research (21 percent), and Facebook contained more self-promotional content (25 percent). Integrated-only programs on average posted more on Instagram (21.5 ± 15.1 posts) than did independent-only programs (9.4 ± 8.5 posts), and post volume moderately correlated with number of followers. There were no statistically significant differences among regional means. CONCLUSION: Plastic surgery residency programs have incorporated social media into their recruitment strategies and will likely continue to increase and diversify their posts to effectively engage with future applicants.


Subject(s)
COVID-19 , Internship and Residency , Social Media/statistics & numerical data , Surgery, Plastic/education , Humans , United States
12.
J Am Heart Assoc ; 9(8): e014738, 2020 04 21.
Article in English | MEDLINE | ID: mdl-32308096

ABSTRACT

Background The Heart Team approach is ascribed a Class I recommendation in contemporary guidelines for revascularization of complex coronary artery disease. However, limited data are available regarding the decision-making and outcomes of patients based on this strategy. Methods and Results One hundred sixty-six high-risk coronary artery disease patients underwent Heart Team evaluation at a single institution between January 2015 and November 2018. We prospectively collected data on demographics, symptoms, Society of Thoracic Surgeons Predicted Risk of Mortality/Synergy Between PCI with Taxus and Cardiac Surgery (STS-PROM/SYNTAX) scores, mode of revascularization, and outcomes. Mean age was 70.0 years; 122 (73.5%) patients were male. Prevalent comorbidities included diabetes mellitus (51.8%), peripheral artery disease (38.6%), atrial fibrillation (27.1%), end-stage renal disease on dialysis (13.3%), and chronic obstructive pulmonary disease (21.7%). Eighty-seven (52.4%) patients had New York Heart Association III-IV and 112 (67.5%) had Canadian Cardiovascular Society III-IV symptomatology. Sixty-seven (40.4%) patients had left main and 118 (71.1%) had 3-vessel coronary artery disease. The median STS-PROM was 3.6% (interquartile range 1.9, 8.0) and SYNTAX score was 26 (interquartile range 20, 34). The median number of physicians per Heart Team meeting was 6 (interquartile range 5, 8). Seventy-nine (47.6%) and 49 (29.5%) patients underwent percutaneous coronary intervention and coronary artery bypass grafting, respectively. With increasing STS-PROM (low, intermediate, high operative risk), coronary artery bypass graft was performed less often (47.9%, 18.5%, 15.2%) and optimal medical therapy was recommended more often (11.3%, 18.5%, 30.3%). There were no trends in recommendation for coronary artery bypass graft, percutaneous coronary intervention, or optimal medical therapy by SYNTAX score tertiles. In-hospital and 30-day mortality was 3.9% and 4.8%, respectively. Conclusions Integrating a multidisciplinary Heart Team into institutional practice is feasible and provides a formalized approach to evaluating complex coronary artery disease patients. The comprehensive assessment of surgical, anatomical, and other risk scores using a decision aid may guide appropriate, evidence-based management within this team-based construct.


Subject(s)
Cardiovascular Agents/therapeutic use , Coronary Artery Bypass , Coronary Artery Disease/therapy , Decision Support Techniques , Patient Care Team , Percutaneous Coronary Intervention , Aged , Aged, 80 and over , Boston , Cardiovascular Agents/adverse effects , Clinical Decision-Making , Cooperative Behavior , Coronary Angiography , Coronary Artery Bypass/adverse effects , Coronary Artery Bypass/mortality , Coronary Artery Disease/diagnostic imaging , Coronary Artery Disease/mortality , Female , Health Status , Humans , Interdisciplinary Communication , Male , Middle Aged , Percutaneous Coronary Intervention/adverse effects , Percutaneous Coronary Intervention/mortality , Predictive Value of Tests , Prospective Studies , Risk Assessment , Risk Factors , Time Factors , Treatment Outcome , Workflow
13.
Heart ; 104(10): 835-840, 2018 05.
Article in English | MEDLINE | ID: mdl-29092919

ABSTRACT

OBJECTIVES: Although guidelines support aortic valve replacement (AVR) in patients with severe aortic regurgitation (AR) and left ventricular ejection fraction (LVEF) <50%, severe left ventricular dysfunction (LVEF <35%) is thought to confer high surgical risk. We sought to determine if a survival benefit exists with AVR compared with medical management in this high-risk, relatively rare population. METHODS: A large institutional echocardiography database was queried to identify patients with severe AR and LVEF <35%. Manual chart review was performed. Due to small sample size and population heterogeneity, corrected group prognosis method was applied, which calculates the adjusted survival curve for each individual using fitted Cox proportional hazard model. Average survival adjusted for comorbidities and age was then calculated using the weighted average of the individual survival curves. RESULTS: Initially, 2 54 614 echocardiograms were considered, representing 1 45 785 unique patients, of which 40 patients met inclusion criteria. Of those, 18 (45.0%) underwent AVR and 22 (55.0%) were managed medically. Absolute mortality was 27.8% in the AVR group and 91.2% in the medical management group. After multivariate adjustment, end-stage renal disease (HR=17.633, p=0.0335) and peripheral arterial disease (HR=6.050, p=0.0180) were associated with higher mortality. AVR was associated with lower mortality (HR=0.143, p=0.0490). Mean follow-up time of the study cohort was 6.58 years, and mean survival for patients undergoing AVR was 6.31 years. CONCLUSIONS: Even after adjustment for clinical characteristics and patient age, AVR is associated with higher survival for patients with low LVEF and severe AR. Although treatment selection bias cannot be completely eliminated by this analysis, these results provide some evidence that surgery may be associated with prolonged survival in this high-risk patient group.


Subject(s)
Aortic Valve , Echocardiography/methods , Heart Valve Prosthesis , Stroke Volume , Ventricular Dysfunction, Left , Aged , Aortic Valve/diagnostic imaging , Aortic Valve/physiopathology , Aortic Valve Insufficiency/diagnosis , Aortic Valve Insufficiency/mortality , Aortic Valve Insufficiency/surgery , Cohort Studies , Female , Heart Valve Prosthesis Implantation , Humans , Kidney Failure, Chronic/epidemiology , Male , Middle Aged , Peripheral Arterial Disease/epidemiology , Prognosis , Retrospective Studies , Risk Factors , Severity of Illness Index , Survival Analysis , United States/epidemiology , Ventricular Dysfunction, Left/diagnosis , Ventricular Dysfunction, Left/etiology
15.
J Virol ; 89(16): 8258-66, 2015 Aug.
Article in English | MEDLINE | ID: mdl-26018171

ABSTRACT

UNLABELLED: There are two subgroups of respiratory syncytial virus (RSV), A and B, and within each subgroup, isolates are further divided into clades. Several years ago, multiple subgroup B isolates which contained a duplication of 60 nucleotides in the glycoprotein (G) gene were described. These isolates were given a new clade designation of BA based on the site of isolation, Buenos Aires, Argentina. BA RSV strains have since become the predominant circulating clade of RSV B viruses. We hypothesized that the duplicated region in G serves to enhance the function of G in the virus life cycle. We generated recombinant viruses that express a consensus BA G gene or a consensus BA G gene lacking the duplication (GΔdup). We determined that the duplicated region functions during virus attachment to cells. Additionally, we showed that in vitro, the virus containing the duplication has a fitness advantage compared to the virus without the duplication. Our data demonstrate that the duplicated region in the BA strain G protein augments virus attachment and fitness. IMPORTANCE: Respiratory syncytial virus (RSV) is an important pathogen for infants for which there is no vaccine. Different strains of RSV circulate from year to year, and the predominating strains change over time. Subgroup B RSV strains with a duplication in the attachment glycoprotein (G) emerged and then became the dominant B genotype. We found that a recombinant virus harboring the duplication bound more efficiently to cells and was more fit than a recombinant strain lacking the duplication. Our work advances a mechanism for an important natural RSV mutation.


Subject(s)
Glycoproteins/metabolism , Nucleotides/genetics , Respiratory Syncytial Viruses/metabolism , Viral Proteins/metabolism , Amino Acid Sequence , Animals , CHO Cells , Cell Line , Cricetinae , Cricetulus , Female , Glycoproteins/chemistry , Glycoproteins/genetics , Mice , Mice, Inbred BALB C , Molecular Sequence Data , Recombination, Genetic , Respiratory Syncytial Viruses/pathogenicity , Sequence Homology, Amino Acid , Viral Proteins/chemistry , Viral Proteins/genetics , Virulence
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