132 results on '"McNulty, Margaret A."'
Search Results
102. Applied Anatomy in Blepharoplasty
- Author
-
Halepas, Steven, Chen, Xun J., Banki, Mohammad, Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
103. Neuromodulators (Botox)
- Author
-
Goldschmidt, Mathew, Clemow, Justin B., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
104. Facelift
- Author
-
Won, Brian Wong, Joshi, Neel S., Jongbloed, Walter, Castiglione, Charles L., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
105. Forehead and Eyebrow Lift Techniques
- Author
-
Cuzalina, Angelo, Sohn, Andrew, Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
106. Anatomy of the Neck
- Author
-
Niekrash, Christine E., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
107. Anatomy of the Superficial Face: Muscles of Face and Scalp, Superficial Vessels and Nerves, Major Salivary Glands
- Author
-
Niekrash, Christine E., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
108. Anatomy of the Integumentary System
- Author
-
Koeppen, Bruce M., Niekrash, Christine E., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
109. Anatomy of the Periorbital Region
- Author
-
Niekrash, Christine E., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
110. Anatomy of the External Ear
- Author
-
Niekrash, Christine E., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
111. Cervical (Neck) Local Anesthesia Techniques
- Author
-
Herriott, Hannah, Robertson, Kyle, Noblitt, Benjamin, Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
112. Management of Local Anesthetic Complications
- Author
-
Camiel, Ross, Roh, Samuel, Lottinger, Christy, Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
113. Overview of Local Anesthesia
- Author
-
Kramer, Kyle J., Riley, Cara J., Brady, Jason W., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
114. Transfacial Local Anesthesia Techniques
- Author
-
Byram, Jessica N., Decloux, Derek, Haxhi, Christopher, Goupil, Michael T., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
115. Intraoral Local Mandibular Anesthesia
- Author
-
Anderson, Benjamin, Walker, Chandler L., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
116. Intraoral Maxillary Local Anesthesia Techniques
- Author
-
Halepas, Steven, Hoffman, Leslie A., Goupil, Michael T., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
117. Muscles of Mastication and the Temporomandibular Joint
- Author
-
Niekrash, Christine E., Ferneini, Elie M., editor, Goupil, Michael T., editor, McNulty, Margaret A., editor, and Niekrash, Christine E., editor
- Published
- 2021
- Full Text
- View/download PDF
118. Chaotic fun! Promoting active recall of anatomical structures and relationships using the Catch-Phrase game.
- Author
-
Cale AS and McNulty MA
- Abstract
Active recall, the act of recalling knowledge from memory, and games-based learning, the use of games and game elements for learning, are well-established as effective strategies for learning gross anatomy. An activity that applies both principles is Catch-Phrase, a fast-paced word guessing game. In Anatomy Catch-Phrase, players must get their teammates to identify an anatomical term by describing its features, functions, or relationships without saying the term itself. Once a teammate guesses the term, players switch roles and continue play with the next term(s) until time runs out. Meanwhile, the instructor notes common errors and reviews knowledge gaps with the team at the end of the round. Prior to the first exam, a seven-question evaluation was distributed to the health professional students. A total of 18 dissection lab groups (86%) played one round of Anatomy Catch-Phrase, with many groups playing multiple times. After the first exam, 73 students (61%) completed the evaluation. On a five-point scale, most students indicated they enjoyed Anatomy Catch-Phrase (4.3 ± 0.9), highly recommended it (4.2 ± 0.9), and wanted to play it in the future (4.3 ± 1.0). Most students also found the game relevant to the course material (4.5 ± 0.8), useful for reviewing (3.9 ± 0.9), and helped reinforce their knowledge (3.9 ± 0.9). Anatomy Catch-Phrase was highly rated, with a score of 4.3 ± 0.9. Multiple students also provided enthusiastic unsolicited comments, such as 'LOVED IT! A fun way to study anatomy!:)'. Overall, Anatomy Catch-Phrase was well-received as a fun activity for reviewing the anatomy relevant to the course., (© 2025 The Author(s). Anatomical Sciences Education published by Wiley Periodicals LLC on behalf of American Association for Anatomy.)
- Published
- 2025
- Full Text
- View/download PDF
119. Musculoskeletal Clinical Online Cases With a Focus on Anatomy for Preclinical Learners.
- Author
-
Robertson K, McNulty MA, Natoli RM, Stout J, and Ulrich G
- Subjects
- Humans, Anatomy education, Internet, Education, Distance methods, Education, Medical, Undergraduate methods, Educational Measurement methods, Musculoskeletal Diseases, Curriculum, Students, Medical statistics & numerical data
- Abstract
Introduction: While musculoskeletal disorders are leading causes of medical visits, musculoskeletal education is underrepresented in US medical curricula. Previous studies have demonstrated that undergraduate medical students often fail to demonstrate competency surrounding musculoskeletal disorders. More educational content is needed to support musculoskeletal knowledge in learners., Methods: We developed an online, case-based musculoskeletal module for second-year medical students alongside their standard course material and presented clinical cases with multiple-choice question quizzes regarding the presentation, diagnosis, and anatomic correlation of musculoskeletal conditions. Cases, under 10 minutes each, targeted common, medically important areas of musculoskeletal health., Results: Grades in the required musculoskeletal course were significantly and positively correlated with online module quiz performance. 258 (73%) of 354 students completed at least one quiz, and students completed an average of 14 out of 15 quizzes. Learners who completed more than 50% of the quizzes performed significantly better in the course than those who completed fewer quizzes; this was true for a formative internal course exam ( p = .035), an NBME customized assessment ( p = .008), and the course overall ( p = .021). Additional analyses of students' perceptions revealed that students valued the self-directed online learning environment. The high completion rate (73%) for the online module also signaled student value in the content and format., Discussion: This module represents educational material that has been demonstrated to improve medical student musculoskeletal learning. Additionally, the module could be expanded to address inadequacies in orthopedic education among other students, such as allied health learners., (© 2024 Robertson et al.)
- Published
- 2024
- Full Text
- View/download PDF
120. Clinically relevant doses of tiludronate do not affect bone remodelling in pasture-exercised horses.
- Author
-
Tippen SP, Metzger CE, Sacks SA, Allen MR, Mitchell CF, and McNulty MA
- Abstract
Background: Bisphosphonates are widely used in equine athletes to reduce lameness associated with skeletal disorders. Widespread off-label use has led to concern regarding potential negative effects on bone healing, but little evidence exists to support or refute this., Objectives: To investigate the influence of clinically relevant doses of tiludronate on bone remodelling and bone healing., Study Design: Randomised, controlled in vivo experiments., Methods: Each horse had a single tuber coxae biopsied (Day 0), then were divided into a treatment (IV tiludronate) or control (IV saline) group. Treatments were administered 30 and 90 days following initial biopsy. Biopsy of the tuber coxae was repeated on Day 60 to evaluate bone healing following a single treatment. Oxytetracycline was administered on Days 137 and 147 to label bone formation. The contralateral tuber coxae was biopsied on Day 150 to evaluate effects of repeated treatment. Bone biopsies were evaluated with micro-computed tomography and/or dynamic histomorphometry using standard techniques., Results: Nineteen horses completed the study, with no complications following the biopsies and treatments. No significant differences in the trabecular bone parameters or bone formation rate were observed between treatment groups., Main Limitations: The use of a first-generation bisphosphonate may mean some effects of these drugs are underrepresented using this model. The results pertain to the tuber coxae and may not reflect injury or the healing response that occurs in long bones in training or racing., Conclusions: In this model, tiludronate did not affect normal bone remodelling in the horse, despite repeat dosages., (© 2024 The Author(s). Equine Veterinary Journal published by John Wiley & Sons Ltd on behalf of EVJ Ltd.)
- Published
- 2024
- Full Text
- View/download PDF
121. Integrated Case-Based Learning Session for Breast and Upper Limb Anatomy.
- Author
-
Merritt E, McNulty MA, and Byram JN
- Subjects
- Humans, Female, Surveys and Questionnaires, Education, Medical, Undergraduate methods, Curriculum, Students, Medical statistics & numerical data, Problem-Based Learning methods, Breast anatomy & histology, Educational Measurement, Upper Extremity, Anatomy education
- Abstract
Introduction: Medical students are frequently introduced to medical school curricula through anatomy coursework, which often includes histology and embryology content. As medical education has increasingly emphasized integration of content areas, use of activities such as case-based learning (CBL) sessions has grown. Little published work has demonstrated the effectiveness of CBL sessions in integrating anatomy, embryology, and histology on first-year medical students' ability to improve content mastery and adapt their study techniques., Methods: We developed a CBL session that included anatomy, embryology, and histology content covering the upper extremity and breast pathology that was taught to incoming first-year medical students ( N = 51) during a prematriculation program in the summers of 2022 and 2023. The session involved completion of an individual pre- and postsession quiz; group completion of clinical cases involving image interpretation, matching exercises, and construction of diagrams, flowcharts, or tables; and a postsession survey with Likert-style and free-response questions about preparation and session effectiveness., Results: Postsession quiz scores significantly improved ( p < .001). On the postsession survey (response rate: 59%), students commented that they enjoyed the real-life application and integration of the cases and that the sessions improved their understanding of the connections between content areas. Other comments demonstrated that students were evaluating and adapting their study approach in preparation for the sessions, often using techniques introduced and practiced in the sessions., Discussion: CBL sessions can provide opportunities to incoming first-year medical students to practice, adapt, and evaluate study techniques while delivering integrated content., (© 2024 Merritt et al.)
- Published
- 2024
- Full Text
- View/download PDF
122. Pre- and post-examination reflections of first-year medical students in an integrated medical anatomy course.
- Author
-
Cale AS, Hoffman LA, and McNulty MA
- Subjects
- Humans, Educational Measurement, Learning, Curriculum, Students, Medical psychology, Anatomy education
- Abstract
Due to the rigor and pace of undergraduate medical anatomy courses, it is not uncommon for students to struggle and fail initially. However, repetition of coursework places an additional burden on the student, instructor, and institution. The purpose of this study was to compare the exam preparation strategies of repeating and non-repeating students to identify areas where struggling students can be supported prior to course failure. As part of their integrated anatomy course, first-year medical students at Indiana University completed a metacognitive Practice-Based Learning and Improvement (PBLI) assignment prior to and after their first exam. In the PBLIs, students were asked to reflect on their exam preparation strategies, confidence, and satisfaction, as well as their predicted and actual exam performance. PBLI responses from non-repeating and repeating students were then analyzed quantitatively and qualitatively. A total of 1802 medical students were included in this study, including 1751 non-repeating and 51 repeating students. Based on their PBLI responses, non-repeating students were appropriately confident, somewhat satisfied, and more accurate when predicting their exam performance. Repeating students were overconfident, dissatisfied, and inaccurate when predicting their first exam performance on their initial, unsuccessful attempt but were more successful on their second, repeat attempt. Qualitative analysis revealed that repeating students aimed to improve their studying by modifying their existing study strategies and managing their time more effectively. In conjunction with other known risk factors, these insights into repeater and non-repeater exam preparation practices can help anatomy educators better identify and support potential struggling students., (© 2023 The Authors. Anatomical Sciences Education published by Wiley Periodicals LLC on behalf of American Association for Anatomy.)
- Published
- 2024
- Full Text
- View/download PDF
123. Promoting metacognition in an allied health anatomy course.
- Author
-
Cale AS, Hoffman LA, and McNulty MA
- Subjects
- Humans, Learning, Students, Educational Measurement, Metacognition, Anatomy education
- Abstract
Metacognition, the ability to self-regulate one's learning and performance, has been shown to improve student outcomes. Anatomy is recognized as one of the toughest courses in allied health curricula, and students could benefit from metacognitive activities. The purpose of this study was to explore the changes in metacognition of allied health students in an anatomy course and identify which groups need support with this skill. First-year physician assistant (MPAS), physical therapy (DPT), and occupational therapy (OTD) students (n = 129) were invited to participate. At the beginning and end of the course, students completed a questionnaire including the metacognitive awareness inventory (MAI) that assesses metacognition. Students were also asked to reflect on their examination performances using a modified Likert scale and participated in reflective discussion boards to encourage development of metacognitive skills, which were thematically analyzed. Paired metacognition scores had increased significantly by the end of the course. However, middle-performers anticipated high grades and were less satisfied with their grade, indicating a disconnect in their metacognition compared to high- and low-performers. Students' receptiveness to modifying study strategies to improve performance declined throughout the course; by mid-way through, they relied more on existing strategies. Increasing time constraints were frequently cited as a major factor when considering study strategies and modification of such strategies. To maximize the effectiveness of metacognitive activities, they should be positioned early in the course when students are most receptive. In addition, middle performers may benefit from additional support to improve metacognition., (© 2022 The Authors. Anatomical Sciences Education published by Wiley Periodicals LLC on behalf of American Association for Anatomy.)
- Published
- 2023
- Full Text
- View/download PDF
124. Determining baseline anatomy knowledge among professional allied health students.
- Author
-
Fagalde MC and McNulty MA
- Subjects
- Humans, Students, Allied Health Personnel, Emotions, Curriculum, Anatomy education, Students, Medical, Education, Medical, Undergraduate
- Abstract
Health professional students often struggle with anatomy coursework despite undergraduate coursework in anatomy. Educators must identify early on whether students may struggle in order to target remediation. The purpose of the study was to elucidate whether an assessment tool administered before the start of a professional anatomy course correlated with allied health students' course performance. Students over four years were given a quiz covering anatomy knowledge they were expected to know upon matriculation to their professional program. A supplemental data form was administered at the course's conclusion to identify prior anatomy experience and topics in which students felt deficient. Pre-quiz scores significantly correlated with examination performance throughout the course. Students reported feeling most deficient in neurobiology (54.9%) and anatomy terminology (39.1%). Videos were created to target these deficient knowledge areas; students who watched the videos did better in course assessments than those who did not. Most respondents (98.0%) recommended students take an undergraduate anatomy course prior to starting a health professional program. These results indicate that a quiz assessing anatomy knowledge among matriculating students may identify students with the potential to struggle in a professional anatomy course early on. Responses outlined areas in which students felt deficient, which allows educators to target topics early with intervention tools such as the review videos in this study. Finally, most respondents strongly recommended undergraduate coursework in anatomy prior to starting a professional health program, which outlines students' recognition that a solid foundation in anatomical knowledge is important to success in professional programs., (© 2022 The Authors. Anatomical Sciences Education published by Wiley Periodicals LLC on behalf of American Association for Anatomy.)
- Published
- 2023
- Full Text
- View/download PDF
125. Virtual learning impacts communication and teamwork.
- Author
-
Herriott HL and McNulty MA
- Subjects
- Communication, Curriculum, Humans, Interprofessional Relations, Learning, COVID-19, Education, Distance
- Abstract
Background: Essential interpersonal skills, such as teamwork and communication, are increasingly emphasised in the curricula of various health professions' programmes. A push towards virtual learning has gained traction following COVID-19 online learning; however, the implications of this modality on the aforementioned skills remain unclear., Approach: Medical, physician assistant, physical therapy and occupational therapy students engaged in a four-part educational intervention aimed at promoting interprofessional teamwork, communication and role knowledge during an anatomy course taught in-person in 2019 and virtually in 2020. Students' perceptions of the intervention were explored through focus groups following each of these educational interventions using inductive coding., Evaluation: A comparison of focus group and survey data collected in both years demonstrated less effective communication and teamwork. With respect to communication and teamwork in a virtual learning setting, the following subthemes were identified: Challenges ascribed to the virtual learning format, Feeling of missing out on in-person experiences, Less engagement and accountability, Lack of bonding and teamwork, Feeling uncomfortable, as well as Added difficulty regarding Conversing, Ensuring inclusivity, Hesitation and Inadvertently domineering discussions. Communication challenges stemming from the virtual learning format were identified as the primary hindrance., Implications: Therefore, virtual learning may be less effective than in-person with respect to cultivating communication and teamwork skills. In our context, and based on the evaluation, we have decided to assess the utility of virtual interactive sessions in the context of other activities in the curriculum to ensure in-person opportunities are available for students to cultivate the necessary communication and teamwork skills., (© 2022 The Authors. The Clinical Teacher published by Association for the Study of Medical Education and John Wiley & Sons Ltd.)
- Published
- 2022
- Full Text
- View/download PDF
126. Breaking barriers: The landscape of human and veterinary medical anatomy education and the potential for collaboration.
- Author
-
McNulty MA, Mussell JC, and Lufler RS
- Subjects
- Anatomy, Veterinary education, Curriculum, Female, Humans, United States, Anatomists education, Anatomy education, Education, Medical, Education, Veterinary
- Abstract
Despite human (HUM) and veterinary (VET) medical institutions sharing the goal of educating future clinicians, there is little collaboration between them regarding curricular and pedagogical practices during the preclinical/basic science training years. This may be, at least in part, due to a lack of understanding of each type of curriculum. This study presents data about curricula, student populations, pedagogical methodologies applied, and anatomy educators' training at both HUM and VET institutions. Preclinical curricula, admissions criteria, and student demographics were analyzed for 21 institutions in the United States having both HUM and VET schools. This dataset was augmented by a questionnaire sent to anatomists internationally, detailing anatomy curricula, pedagogies applied, and anatomy educators' training. Many curricular similarities between both training programs were identified, including anatomy education experiences. However, VET programs were found to include more preclinical coursework than HUM programs. Students who matriculate to VET or HUM schools have similar academic records, including prerequisite coursework and grade point average. Median HUM class size was significantly larger, and the percentage of women enrolled in VET institutions was significantly higher. Training of anatomy educators was identical with one exception: VET educators are far more likely to hold a clinical degree. This study elucidates the substantial similarities between VET and HUM programs, particularly in anatomy education, underscoring the potential for collaboration between both types of programs in areas such as interprofessional education, bioethics, zoonotic disease management, and postgraduate training., (© 2021 American Association for Anatomy.)
- Published
- 2022
- Full Text
- View/download PDF
127. NOMENs land: The place of eponyms in the anatomy classroom.
- Author
-
McNulty MA, Wisner RL, and Meyer AJ
- Subjects
- Educational Status, Eponyms, Humans, Male, Students, Abnormalities, Multiple, Anatomy education
- Abstract
The law of Non-Original Malappropriate Eponymous Nomenclature (NOMEN) states that no phenomenon is named after its discoverer. However, eponymous terms are rife in the anatomical and medical literature. In this viewpoint commentary, the authors discuss the history of anatomical eponyms, explain the additional cognitive load imposed by eponyms that can negatively impact student learning and explore the view that eponyms are "pale, male and stale" in the socially conscious 21st century. The authors probe two of the most common arguments used to keep eponyms in anatomy education: (1) clinicians use them because they are easy, and (2) eponyms remind us of anatomy's history. Educators, clinicians and students need to work together to progress this movement and bring a modern lens to this discussion. Based on the arguments presented in this commentary, the authors propose that eponyms should be removed from anatomy curricula, textbooks and have no place in the anatomy classroom., (© 2021 American Association for Anatomy.)
- Published
- 2021
- Full Text
- View/download PDF
128. FGF21, not GCN2, influences bone morphology due to dietary protein restrictions.
- Author
-
McNulty MA, Goupil BA, Albarado DC, Castaño-Martinez T, Ambrosi TH, Puh S, Schulz TJ, Schürmann A, Morrison CD, and Laeger T
- Abstract
Background: Dietary protein restriction is emerging as an alternative approach to treat obesity and glucose intolerance because it markedly increases plasma fibroblast growth factor 21 (FGF21) concentrations. Similarly, dietary restriction of methionine is known to mimic metabolic effects of energy and protein restriction with FGF21 as a required mechanism. However, dietary protein has been shown to be required for normal bone growth, though there is conflicting evidence as to the influence of dietary protein restriction on bone remodeling. The purpose of the current study was to evaluate the effect of dietary protein and methionine restriction on bone in lean and obese mice, and clarify whether FGF21 and general control nonderepressible 2 (GCN2) kinase, that are part of a novel endocrine pathway implicated in the detection of protein restriction, influence the effect of dietary protein restriction on bone., Methods: Adult wild-type (WT) or Fgf21 KO mice were fed a normal protein (18 kcal%; CON) or low protein (4 kcal%; LP) diet for 2 or 27 weeks. In addition, adult WT or Gcn2 KO mice were fed a CON or LP diet for 27 weeks. Young New Zealand obese (NZO) mice were placed on high-fat diets that provided protein at control (16 kcal%; CON), low levels (4 kcal%) in a high-carbohydrate (LP/HC) or high-fat (LP/HF) regimen, or on high-fat diets (protein, 16 kcal%) that provided methionine at control (0.86%; CON-MR) or low levels (0.17%; MR) for up to 9 weeks. Long bones from the hind limbs of these mice were collected and evaluated with micro-computed tomography (μCT) for changes in trabecular and cortical architecture and mass., Results: In WT mice the 27-week LP diet significantly reduced cortical bone, and this effect was enhanced by deletion of Fgf21 but not Gcn2 . This decrease in bone did not appear after 2 weeks on the LP diet. In addition, Fgf21 KO mice had significantly less bone than their WT counterparts. In obese NZO mice dietary protein and methionine restriction altered bone architecture. The changes were mediated by FGF21 due to methionine restriction in the presence of cystine, which did not increase plasma FGF21 levels and did not affect bone architecture., Conclusions: This study provides direct evidence of a reduction in bone following long-term dietary protein restriction in a mouse model, effects that appear to be mediated by FGF21., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2020 The Authors. Published by Elsevier Inc.)
- Published
- 2019
- Full Text
- View/download PDF
129. Impaired Annulus Fibrosus Development and Vertebral Fusion Cause Severe Scoliosis in Mice with Deficiency of c-Jun NH2-Terminal Kinases 1 and 2.
- Author
-
Ulici V, Kelley KL, Longobardi L, McNulty MA, Livingston EW, Bateman TA, Séguin CA, Louer CR, and Loeser RF
- Subjects
- Animals, Annulus Fibrosus enzymology, Cell Differentiation, Cell Proliferation, Cervical Vertebrae enzymology, Chondrogenesis, Female, Intervertebral Disc enzymology, Male, Mice, Mice, Inbred C57BL, Mice, Knockout, Phenotype, Phosphorylation, Scoliosis enzymology, Scoliosis pathology, Annulus Fibrosus pathology, Cervical Vertebrae pathology, Intervertebral Disc pathology, Mitogen-Activated Protein Kinase 8 physiology, Mitogen-Activated Protein Kinase 9 physiology, Scoliosis etiology, Spinal Fusion
- Abstract
Mitogen-activated protein kinases, including c-Jun NH2-terminal kinase (JNK), play an important role in the development and function of a large variety of tissues. The skeletal phenotype of JNK1 and JNK2 double-knockout (dKO) mice (JNK1
fl/fl Col2-Cre/JNK2-/- ) and control genotypes were analyzed at different embryonic and postnatal stages. JNK1/2 dKO mice displayed a severe scoliotic phenotype beginning during development that was grossly apparent around weaning age. Alcian blue staining at embryonic day 17.5 showed abnormal fusion of the posterior spinal elements. In adult mice, fusion of vertebral bodies and of spinous and transverse processes was noted by micro-computed tomography, Alcian blue/Alizarin red staining, and histology. The long bones developed normally, and histologic sections of growth plate and articular cartilage revealed no significant abnormalities. Histologic sections of the vertebral column at embryonic days 15.5 and 17.5 revealed an abnormal organization of the annulus fibrosus in the dKOs, with chondrocyte-like cells and fusion of dorsal processes. Spinal sections in 10-week-old dKO mice showed replacement of intervertebral disk structures (annulus fibrosus and nucleus pulposus) by cartilage and bone tissues, with cells staining for markers of hypertrophic chondrocytes, including collagen X and runt-related transcription factor 2. These findings demonstrate a requirement for both JNK1 and JNK2 in the normal development of the axial skeleton. Loss of JNK signaling results in abnormal endochondral bone formation and subsequent severe scoliosis., (Copyright © 2019 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved.)- Published
- 2019
- Full Text
- View/download PDF
130. Tiludronate and clodronate do not affect bone structure or remodeling kinetics over a 60 day randomized trial.
- Author
-
Richbourg HA, Mitchell CF, Gillett AN, and McNulty MA
- Subjects
- Animals, Biopsy veterinary, Bone and Bones drug effects, Bone and Bones surgery, Horses, Lameness, Animal drug therapy, Osteogenesis drug effects, Pilot Projects, Bone Density Conservation Agents therapeutic use, Bone Remodeling drug effects, Clodronic Acid therapeutic use, Diphosphonates therapeutic use, Horse Diseases drug therapy
- Abstract
Background: Tiludronate and clodronate are FDA-approved bisphosphonate drug therapies for navicular disease in horses. Although clinical studies have determined their ability to reduce lameness associated with skeletal disorders in horses, data regarding the effect on bone structure and remodeling is lacking. Additionally, due to off-label use of these drugs in young performance horses, effects on bone in young horses need to be investigated. Therefore, the purpose of this randomized, experimental pilot study was to determine the effect of tiludronate and clodronate on normal bone cells, structure and remodeling after 60 days in clinically normal, young horses. Additionally, the effect of clodronate on bone healing 60 days after an induced defect was investigated., Results: All horses tolerated surgery well, with no post-surgery lameness and all acquired biopsies being adequate for analyses. Overall, tiludronate and clodronate did not significantly alter any bone structure or remodeling parameters, as evaluated by microCT and dynamic histomorphometry. Tiludronate did not extensively impact bone formation or resorption parameters as evaluated by static histomorphometry. Similarly, clodronate did not affect bone formation or resorption after 60 days. Sixty days post-defect, healing was minimally affected by clodronate., Conclusions: Tiludronate and clodronate do not appear to significantly impact bone tissue on a structural or cellular level using standard dose and administration schedules.
- Published
- 2018
- Full Text
- View/download PDF
131. Anatomical Variation of the Tarsus in Common Inbred Mouse Strains.
- Author
-
Richbourg HA, Martin MJ, Schachner ER, and McNulty MA
- Subjects
- Animals, Ankle diagnostic imaging, Ankle Joint diagnostic imaging, Mice, Mice, Inbred Strains, Rats, Species Specificity, X-Ray Microtomography, Anatomic Variation, Ankle anatomy & histology, Ankle Joint anatomy & histology
- Abstract
Rodent models are used for a variety of orthopedic research applications; however, anatomy references include mostly artistic representations. Advanced imaging techniques, including micro-computed tomography (microCT), can provide more accurate representations of subtle anatomical characteristics. A recent microCT atlas of laboratory mouse (Mus musculus) anatomy depicts the central and tarsal bone III (T3) as a single bone, differing from previous references. Fusion of tarsal bones is generally characterized as pathological secondary to mutations associated with growth factors, and normal variation has not been documented in the mouse tarsus. Therefore, it is unclear if this fusion is a normal or a pathological characteristic. The aim of this study is to characterize the tarsus of the laboratory mouse and compare it to the rat and selected outgroup species (i.e., white-footed mouse) via microCT and histology to determine if the central and T3 are separate or fused into a single bone. Laboratory mice (C57/Bl6 [n = 17] and BalbC [n = 2]) and rats (n = 5) were scanned with microCT. A representative laboratory mouse from each strain was evaluated histologically via serial sagittal sections through the mid-tarsus. General pedal anatomy was similar between all species; however, the central and T3 bones were fused in all laboratory mice but not the rat or white-footed mouse. A band of hyaline cartilage was identified within the fused bone of the laboratory mice. We conclude that the fusion found is a normal characteristic in laboratory mice, but timing of the fusion remains ambiguous. Anat Rec, 300:450-459, 2017. © 2016 Wiley Periodicals, Inc., (© 2016 Wiley Periodicals, Inc.)
- Published
- 2017
- Full Text
- View/download PDF
132. Loss of Oncostatin M Signaling in Adipocytes Induces Insulin Resistance and Adipose Tissue Inflammation in Vivo.
- Author
-
Elks CM, Zhao P, Grant RW, Hang H, Bailey JL, Burk DH, McNulty MA, Mynatt RL, and Stephens JM
- Subjects
- 3T3-L1 Cells, Adipocytes pathology, Adipose Tissue pathology, Animals, CD11c Antigen genetics, CD11c Antigen metabolism, CD4 Antigens genetics, CD4 Antigens metabolism, CD8 Antigens genetics, CD8 Antigens metabolism, Gene Expression Regulation genetics, Gene Knockdown Techniques, Mice, Mice, Mutant Strains, Obesity pathology, Oncostatin M genetics, Oncostatin M Receptor beta Subunit genetics, Oncostatin M Receptor beta Subunit metabolism, Panniculitis genetics, Panniculitis pathology, Adipocytes metabolism, Adipose Tissue metabolism, Insulin Resistance, Obesity metabolism, Oncostatin M metabolism, Panniculitis metabolism, Signal Transduction
- Abstract
Oncostatin M (OSM) is a multifunctional gp130 cytokine. Although OSM is produced in adipose tissue, it is not produced by adipocytes. OSM expression is significantly induced in adipose tissue from obese mice and humans. The OSM-specific receptor, OSM receptor β (OSMR), is expressed in adipocytes, but its function remains largely unknown. To better understand the effects of OSM in adipose tissue, we knocked down Osmr expression in adipocytes in vitro using siRNA. In vivo, we generated a mouse line lacking Osmr in adiponectin-expressing cells (OSMR(FKO) mice). The effects of OSM on gene expression were also assessed in vitro and in vivo OSM exerts proinflammatory effects on cultured adipocytes that are partially rescued by Osmr knockdown. Osm expression is significantly increased in adipose tissue T cells of high fat-fed mice. In addition, adipocyte Osmr expression is increased following high fat feeding. OSMR(FKO) mice exhibit increased insulin resistance and adipose tissue inflammation and have increased lean mass, femoral length, and bone volume. Also, OSMR(FKO) mice exhibit increased expression of Osm, the T cell markers Cd4 and Cd8, and the macrophage markers F4/80 and Cd11c Interestingly, the same proinflammatory genes induced by OSM in adipocytes are induced in the adipose tissue of the OSMR(FKO) mouse, suggesting that increased expression of proinflammatory genes in adipose tissue arises both from adipocytes and other cell types. These findings suggest that adipocyte OSMR signaling is involved in the regulation of adipose tissue homeostasis and that, in obesity, OSMR ablation may exacerbate insulin resistance by promoting adipose tissue inflammation., (© 2016 by The American Society for Biochemistry and Molecular Biology, Inc.)
- Published
- 2016
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.