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  1. Article ; Online: Ketotifen directly modifies the fibrotic response of human skin fibroblasts.

    Leong, Edwin / Al-Bitar, Haya / Marshall, Jean S / Bezuhly, Michael

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 7076

    Abstract: Fibrosis is a destructive, end-stage disease process. In the skin, it is associated with systemic sclerosis and scarring with considerable health burden. Ketotifen is a clinical antihistamine and mast cell stabilizer. Studies have demonstrated mast cell- ... ...

    Abstract Fibrosis is a destructive, end-stage disease process. In the skin, it is associated with systemic sclerosis and scarring with considerable health burden. Ketotifen is a clinical antihistamine and mast cell stabilizer. Studies have demonstrated mast cell-dependent anti-fibrotic effects of ketotifen but direct effects on fibroblasts have not been determined. Human dermal fibroblasts were treated with pro-fibrotic transforming growth factor-β1 (TGFβ) followed by ketotifen or control treatments to determine direct effects on fibrotic fibroblasts. Ketotifen impaired TGFβ-induced α-smooth muscle actin gene and protein responses and decreased cytoskeletal- and contractility-associated gene responses associated with fibrosis. Ketotifen reduced Yes-associated protein phosphorylation, transcriptional coactivator with PDZ binding motif transcript and protein levels, and phosphorylation of protein kinase B. In a fibroblast-populated collagen gel contraction assay, ketotifen reduced the contractile activity of TGFβ-activated fibroblasts. In a murine model of bleomycin-induced skin fibrosis, collagen density and dermal thickness were significantly decreased in ketotifen-treated mice supporting in vitro findings. These results support a novel, direct anti-fibrotic activity of ketotifen, reducing pro-fibrotic phenotypic changes in fibroblasts and reducing collagen fibres in fibrotic mouse skin. Together, these findings suggest novel therapeutic potential and a novel mechanism of action for ketotifen in the context of fibrosis.
    MeSH term(s) Humans ; Mice ; Animals ; Ketotifen/pharmacology ; Ketotifen/metabolism ; Ketotifen/therapeutic use ; Fibrosis ; Skin/metabolism ; Scleroderma, Systemic/metabolism ; Collagen/metabolism ; Fibroblasts/metabolism ; Bleomycin/pharmacology ; Transforming Growth Factor beta1/metabolism ; Cells, Cultured ; Transforming Growth Factor beta/metabolism
    Chemical Substances Ketotifen (X49220T18G) ; Collagen (9007-34-5) ; Bleomycin (11056-06-7) ; Transforming Growth Factor beta1 ; Transforming Growth Factor beta
    Language English
    Publishing date 2024-03-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-57776-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Sternal cleft reconstruction with acellular dermal matrix and full-thickness calvarial graft.

    Ching, Carmen / Sett, Suvro / Walling, Simon / Bezuhly, Michael

    European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery

    2023  Volume 63, Issue 4

    Abstract: We describe reconstruction of a sternal cleft in a neonate using acellular dermal matrix, full-thickness calvarial bone graft and myocutaneous pectoralis flaps. ...

    Abstract We describe reconstruction of a sternal cleft in a neonate using acellular dermal matrix, full-thickness calvarial bone graft and myocutaneous pectoralis flaps.
    MeSH term(s) Humans ; Infant, Newborn ; Acellular Dermis ; Musculoskeletal Abnormalities ; Sternum/abnormalities
    Language English
    Publishing date 2023-04-01
    Publishing country Germany
    Document type Case Reports ; Journal Article
    ZDB-ID 639293-3
    ISSN 1873-734X ; 1010-7940 ; 1567-4258
    ISSN (online) 1873-734X
    ISSN 1010-7940 ; 1567-4258
    DOI 10.1093/ejcts/ezad126
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The Role of ACE-Inhibitors and ARBs in reducing hypertrophic scarring following bilateral breast reduction.

    Dow, Todd / Selman, Tamara / Williams, Jason / Bezuhly, Michael

    Journal of plastic, reconstructive & aesthetic surgery : JPRAS

    2023  Volume 78, Page(s) 1–3

    Abstract: Background: The angiotensin-renin system (ARS) has been shown to play a role in the promotion of tissue fibrosis through angiotensin II activation of the angiotensin-receptor 1 and subsequently transforming growth factor beta-1 (TGF- β1). Breast ... ...

    Abstract Background: The angiotensin-renin system (ARS) has been shown to play a role in the promotion of tissue fibrosis through angiotensin II activation of the angiotensin-receptor 1 and subsequently transforming growth factor beta-1 (TGF- β1). Breast reduction surgery is known to have a potential complication of hypertrophic scarring. The primary objective of this study is to assess whether the use of angiotensin-converting enzyme inhibitor (ACEi) or angiotensin II receptor blockers (ARBs) by patients undergoing bilateral reduction mammoplasty is correlated with a reduction in hypertrophic scarring complications post-operatively.
    Methods: A retrospective chart review of all patients who received bilateral breast reduction surgery in our province over a 10-year period was performed. Patient charts were reviewed for post-operative hypertrophic scarring as well as medications being used around the time of surgery. The rate of hypertrophic scarring within patients treated with an ACEi or ARB for existing hypertension were compared with the rest of the population.
    Results: A total of 981 patients met the inclusion criteria of the study. The overall incidence of hypertrophic scarring was 6%. Within the population, 132 (14%) of patients had a clinical diagnosis of hypertension. Of the patients who were managed with an ACEi or ARB, one (2%) patient developed hypertrophic scarring post-operatively. This was significantly less than the total population and the remainder of the population with hypertension treated with a medication other than an ACEi or ARB.
    Conclusions: This study investigated the impact of routine ACEi or ARB use by patients undergoing bilateral reduction mammoplasty and demonstrated a statistically significant reduction in the incidence of hypertrophic scarring. This study is one of the first to investigate ACEi or ARB use in humans to reduce rates of unsightly scarring.
    Level of evidence: Level III.
    MeSH term(s) Humans ; Angiotensin-Converting Enzyme Inhibitors/therapeutic use ; Angiotensin Receptor Antagonists/therapeutic use ; Retrospective Studies ; Cicatrix/etiology ; Cicatrix/prevention & control ; Hypertension/epidemiology ; Mammaplasty/adverse effects ; Angiotensins/therapeutic use
    Chemical Substances Angiotensin-Converting Enzyme Inhibitors ; Angiotensin Receptor Antagonists ; Angiotensins
    Language English
    Publishing date 2023-01-12
    Publishing country Netherlands
    Document type Letter
    ZDB-ID 2217750-4
    ISSN 1878-0539 ; 1748-6815 ; 0007-1226
    ISSN (online) 1878-0539
    ISSN 1748-6815 ; 0007-1226
    DOI 10.1016/j.bjps.2022.11.032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Physician Scientists Of Yesterday, Today And Tomorrow - Published 44(3) September 2021.

    Hollenberg, Morley D / Bezuhly, Michael Bezuhly

    Clinical and investigative medicine. Medecine clinique et experimentale

    2021  Volume 44, Issue 3, Page(s) E80–81

    Abstract: In this issue, Ryan Kirkpatrick and Gordon Boyd speculated on the reasons for the dwindling number of physician scientists in Canada. To help stimulate discussion on this important issue, Clinical and Investigative Medicine invited two distinguished ... ...

    Abstract In this issue, Ryan Kirkpatrick and Gordon Boyd speculated on the reasons for the dwindling number of physician scientists in Canada. To help stimulate discussion on this important issue, Clinical and Investigative Medicine invited two distinguished scientists to present their views on this issue.
    MeSH term(s) Canada ; Humans ; Physicians
    Language English
    Publishing date 2021-10-03
    Publishing country Canada
    Document type Editorial ; Comment
    ZDB-ID 434004-8
    ISSN 1488-2353 ; 0147-958X
    ISSN (online) 1488-2353
    ISSN 0147-958X
    DOI 10.25011/cim.v44i3.37244
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Systematic Review of Patient Safety and Quality Improvement Initiatives in Breast Reconstruction.

    Paffile, Julia / McGuire, Connor / Bezuhly, Michael

    Annals of plastic surgery

    2022  Volume 89, Issue 1, Page(s) 121–136

    Abstract: Background: Improving patient care and safety requires high-quality evidence. The objective of this study was to systematically review the existing evidence for patient safety (PS) and quality improvement initiatives in breast reconstruction.: Methods! ...

    Abstract Background: Improving patient care and safety requires high-quality evidence. The objective of this study was to systematically review the existing evidence for patient safety (PS) and quality improvement initiatives in breast reconstruction.
    Methods: A systematic review of the published plastic surgery literature was undertaken using a computerized search and following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Publication descriptors, methodological details, and results were extracted. Articles were assessed for methodological quality and clinical heterogeneity. Descriptive statistics were completed, and a meta-analysis was considered.
    Results: Forty-six studies were included. Most studies were retrospective (52.2%) and from the third level of evidence (60.9%). Overall, the scientific quality was moderate, with randomized controlled trials generally being higher quality. Studies investigating approaches to reduce seroma (28.3% of included articles) suggested a potential benefit of quilting sutures. Studies focusing on infection (26.1%) demonstrated potential benefits to prophylactic antibiotics and drain use under 21 days. Enhanced recovery after surgery protocols (10.9%) overall did not compromise PS and was beneficial in reducing opioid use and length of stay. Interventions to increase flap survival (10.9%) demonstrated a potential benefit of nitroglycerin on mastectomy skin flaps.
    Conclusions: Overall, studies were of moderate quality and investigated several worthwhile interventions. More validated, standardized outcome measures are required, and studies focusing on interventions to reduce thromboembolic events and bleeding risk could further improve PS.
    MeSH term(s) Breast Neoplasms/surgery ; Female ; Humans ; Mammaplasty/methods ; Mastectomy/methods ; Patient Safety ; Quality Improvement ; Retrospective Studies
    Language English
    Publishing date 2022-01-24
    Publishing country United States
    Document type Journal Article ; Systematic Review
    ZDB-ID 423835-7
    ISSN 1536-3708 ; 0148-7043
    ISSN (online) 1536-3708
    ISSN 0148-7043
    DOI 10.1097/SAP.0000000000003062
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Reply: Alternatively Activated M2 Macrophages Improve Autologous Fat Graft Survival in a Mouse Model through Induction of Angiogenesis.

    Bezuhly, Michael

    Plastic and reconstructive surgery

    2015  Volume 136, Issue 2, Page(s) 278e

    MeSH term(s) Adipose Tissue/transplantation ; Animals ; Autografts/immunology ; Graft Survival/immunology ; Macrophages/physiology ; Male
    Language English
    Publishing date 2015-03-26
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 208012-6
    ISSN 1529-4242 ; 0032-1052 ; 0096-8501
    ISSN (online) 1529-4242
    ISSN 0032-1052 ; 0096-8501
    DOI 10.1097/PRS.0000000000001462
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Combining vascularized lymph node transfer with autologous breast reconstruction: A Surveillance, Epidemiology and End Results (SEER) Database cost-utility analysis.

    Corkum, Joseph P / Bezuhly, Michael

    Journal of plastic, reconstructive & aesthetic surgery : JPRAS

    2020  Volume 73, Issue 10, Page(s) 1879–1888

    Abstract: Background: The cost effectiveness of combining vascularized lymph node transfer (VLNT) with autologous breast reconstruction has not been established. Herein we describe the use of Markov modeling to evaluate the cost utility of VLNT with delayed ... ...

    Abstract Background: The cost effectiveness of combining vascularized lymph node transfer (VLNT) with autologous breast reconstruction has not been established. Herein we describe the use of Markov modeling to evaluate the cost utility of VLNT with delayed autologous breast reconstruction for patients with breast cancer related lymphedema (BCRL).
    Methods: We conducted a cost effectiveness analysis using a Markov model with microsimulation. The characteristics and associated life expectancy of the hypothetical patients were derived from the Surveillance, Epidemiology, and End Results database. Costs of were derived from the publicly available sources and health economics literature. The utilities were based on the best available literature. The relative effectiveness of VLNT was derived from a meta-analysis of the literature. A specific strategy is considered attractive if the estimate of incremental cost effectiveness ratio (ICER) is less than the amount decision makers are willing to pay for an additional quality-adjusted life-year (QALY) gain. A baseline willingness to pay of $50,000 USD per additional QALY was used for analysis.
    Results: The base case situation demonstrated an overall ICER of $13898.76/QALY for adding VLNT to delayed autologous abdominally based breast reconstruction in the situation where lymphedema is already present, which suggests it is cost-effective at the chosen willingness to pay.
    Discussion: This cost-utility simulation demonstrates that it is cost effective to combine delayed breast reconstruction with VLNT in patients with existing lymphedema. This could have implications for the application of the evolving technique of VLNT in the treatment of different subpopulations of breast cancer patients, and future clinical research.
    MeSH term(s) Adolescent ; Adult ; Aged ; Breast Neoplasms/economics ; Breast Neoplasms/surgery ; Combined Modality Therapy/economics ; Cost-Benefit Analysis ; Databases, Factual ; Female ; Humans ; Lymph Nodes/blood supply ; Lymph Nodes/transplantation ; Mammaplasty/economics ; Mammaplasty/methods ; Middle Aged ; SEER Program ; Young Adult
    Language English
    Publishing date 2020-05-21
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2217750-4
    ISSN 1878-0539 ; 1748-6815 ; 0007-1226
    ISSN (online) 1878-0539
    ISSN 1748-6815 ; 0007-1226
    DOI 10.1016/j.bjps.2020.05.027
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Rapid intraoperative fabrication of an inexpensive, reliable nasal stent for use after primary cleft nasal repair.

    Bezuhly, Michael

    The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association

    2014  Volume 51, Issue 5, Page(s) e110–2

    Abstract: Nasal stents are frequently used to maintain corrected nostril shape following primary cleft lip and nasal repair. Various stents have been described, but they are often cumbersome to generate, expensive, or difficult to retain. The author describes a ... ...

    Abstract Nasal stents are frequently used to maintain corrected nostril shape following primary cleft lip and nasal repair. Various stents have been described, but they are often cumbersome to generate, expensive, or difficult to retain. The author describes a rapid, effective, and inexpensive alternative to previously described commercially available or molded nasal stents whereby a nasal stent is fabricated from a pediatric nasal oxygen cannula. All patients in whom this stent has been used to date tolerated it well with no complication and with good maintenance of nostril shape at a minimum of 6 months follow-up.
    Language English
    Publishing date 2014-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1069409-2
    ISSN 1545-1569 ; 0009-8701 ; 1055-6656
    ISSN (online) 1545-1569
    ISSN 0009-8701 ; 1055-6656
    DOI 10.1597/13-205
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Comparison of two Specialized Cleft Palate Feeders.

    Penny, Cameron / Nugent, Kendra-Ann / Gilgan, Holly / Bezuhly, Michael

    The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association

    2022  Volume 61, Issue 3, Page(s) 443–449

    Abstract: Objective: To evaluate feeding efficiency and weight gain in infants with cleft palate fed using 1 of the 2 specialty feeders.: Design: Retrospective cohort study.: Setting: Cleft palate clinic in a tertiary pediatric hospital.: Participants: ... ...

    Abstract Objective: To evaluate feeding efficiency and weight gain in infants with cleft palate fed using 1 of the 2 specialty feeders.
    Design: Retrospective cohort study.
    Setting: Cleft palate clinic in a tertiary pediatric hospital.
    Participants: Infants with cleft palate (with or without cleft lip) fed using the Medela SpecialNeeds® Feeder (n = 39) or the Dr. Brown's® Specialty Feeding System (n = 16) and who had documented feeding and growth data available from the time of initial assessment in the first month of life and at subsequent follow-up between 2 and 4 months.
    Primary outcome measure: Feeding velocity (mL/min).
    Secondary outcomes measures: Calorie velocity (kcal/min), weight gain, and complications associated with poor feeding.
    Results: No statistically significant differences in feeding or calorie velocities were identified between infants with cleft palate fed with the Medela SpecialNeeds® feeder and those fed with the Dr. Brown's® feeder. Mean weight z-scores by month did not differ significantly between the 2 bottle groups at the time of initial assessment (P = .84) and follow-up (P = .20). Mean weight z-scores by month for the infants included in this study fell below the 50th percentile. The proportion of infants who developed otitis media, reflux requiring treatment, or who required hospital admission for nasogastric (NG) feeds did not differ significantly between the 2 groups.
    Conclusions: Despite being adequately powered for the primary outcome, no significant differences were identified between infants fed with the Medela or the Dr. Brown's feeders in terms of feeding velocity, calorie velocity, weight gain, or complications.
    MeSH term(s) Infant ; Humans ; Child ; Cleft Palate/complications ; Retrospective Studies ; Cleft Lip/complications ; Weight Gain
    Language English
    Publishing date 2022-10-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1069409-2
    ISSN 1545-1569 ; 0009-8701 ; 1055-6656
    ISSN (online) 1545-1569
    ISSN 0009-8701 ; 1055-6656
    DOI 10.1177/10556656221129977
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Patient Safety and Quality Improvement Initiatives in Cleft Lip and Palate Surgery: A Systematic Review.

    Grue, Brendan / McGuire, Connor / Hong, Paul / Bezuhly, Michael

    The Journal of craniofacial surgery

    2022  Volume 34, Issue 3, Page(s) 979–986

    Abstract: Background: Cleft lip and/or palate repair techniques require continued reevaluation of best practice through high-quality evidence. The objective of this systematic review was to highlight the existing evidence for patient safety and quality ... ...

    Abstract Background: Cleft lip and/or palate repair techniques require continued reevaluation of best practice through high-quality evidence. The objective of this systematic review was to highlight the existing evidence for patient safety and quality improvement (QI) initiatives in cleft lip and palate surgery.
    Methods: A systematic review of published literature evaluating patient safety and QI in patients with cleft lip and/or palate was conducted from database inception to June 9, 2022, using Preferred Reporting Items for Systematic Reviews guidelines. Quality appraisal of included studies was conducted using Methodological Index for Non-Randomized Studies, Cochrane, or a Measurement Tool to Assess Systematic Reviews (AMSTAR) 2 instruments, according to study type.
    Results: Sixty-one studies met inclusion criteria, with most published between 2010 and 2020 (63.9%). Randomized controlled trials represented the most common study design (37.7%). Half of all included studies were related to the topic of pain and analgesia, with many supporting the use of infraorbital nerve block using 0.25% bupivacaine. The second most common intervention examined was use of perioperative antibiotics in reducing fistula and infection (11.5%). Other studies examined optimal age and closure material for cleft lip repair, early recovery after surgery protocols, interventions to reduce blood loss, and safety of outpatient surgery.
    Conclusions: Patient safety and QI studies in cleft surgery were of moderate quality overall and covered a wide range of interventions. To further enhance PS in cleft repair, more high-quality research in the areas of perioperative pharmaceutical usage, appropriate wound closure materials, and optimal surgical timing are needed.
    MeSH term(s) Humans ; Cleft Lip/surgery ; Cleft Palate/surgery ; Patient Safety ; Quality Improvement ; Pain
    Language English
    Publishing date 2022-10-31
    Publishing country United States
    Document type Systematic Review ; Journal Article
    ZDB-ID 1159501-2
    ISSN 1536-3732 ; 1049-2275
    ISSN (online) 1536-3732
    ISSN 1049-2275
    DOI 10.1097/SCS.0000000000009094
    Database MEDical Literature Analysis and Retrieval System OnLINE

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