RESUMO
Bone/fracture healing is a complex process with different steps and four basic tissue layers being affected: cortical bone, periosteum, fascial tissue surrounding the fracture, and bone marrow. Stem cells and their derivatives, including embryonic stem cells, induced pluripotent stem cells, mesenchymal stem cells, hematopoietic stem cells, skeletal stem cells, and multipotent stem cells, can function to artificially introduce highly regenerative cells into decrepit biological tissues and augment the healing process at the tissue level. Stem cells are molecularly and functionally indistinguishable from standard human tissues. The widespread appeal of stem cell therapy lies in its potential benefits as a therapeutic technology that, if harnessed, can be applied in clinical settings. This review aims to establish the molecular pathophysiology of bone healing and the current stem cell interventions that disrupt or augment the bone healing process and, finally, considers the future direction/therapeutic options related to stem cells and bone healing.
Assuntos
Regeneração Óssea , Consolidação da Fratura , Humanos , Regeneração Óssea/fisiologia , Animais , Células-Tronco/citologia , Transplante de Células-Tronco/métodosRESUMO
The purpose of this study was to assess the feasibility of implementing both electronic and in-person assessments to assess falls risk in an older adult secondary fracture clinic. Electronic data capture feasibility was defined as the proportion of patients that completed the electronic questionnaires prior to their clinic visit. In-clinic feasibility was defined in two ways: (1) the proportion of patients that consented to participate at their clinic visit; (2) time to complete testing. Patients were contacted electronically through their health system portal for electronic consent. Patients were invited to complete consent, the STopping Elderly Accidents, Deaths, and Injuries (STEADI) falls risk assessment tool, and the visual analog scale (VAS) for pain. The Short Physical Performance Battery (SPPB) was performed at the clinic visit. A total of 310 patients were contacted electronically. No patients (0%) provided consent through their health portal. Of the 310 patients, 200 (65%) consented in person (Ineligible: 67 [21%]; Declined: 43 [14%]), resulting in an 82% response rate. In-person data collection took a median of 38.48 (Range: 12.34-54.30) minutes to complete. It was not feasible to contact and collect older adult patient data electronically prior to clinic; but, was feasible to obtain these patient-reported outcomes and physical performance data in person.
Assuntos
Acidentes por Quedas , Estudos de Viabilidade , Avaliação Geriátrica , Humanos , Acidentes por Quedas/prevenção & controle , Masculino , Feminino , Idoso , Idoso de 80 Anos ou mais , Medição de Risco , Avaliação Geriátrica/métodos , Desempenho Físico Funcional , Medidas de Resultados Relatados pelo Paciente , Fraturas Ósseas , Inquéritos e QuestionáriosRESUMO
OBJECTIVES: Dual implants for distal femur periprosthetic fractures is a growing area of interest for these challenging fractures with dual plating (DP) emerging as a viable construct for these injuries. In the current study, an experience with DP constructs is described. DESIGN: Retrospective case series with comparison group. SETTING: Level 1 academic trauma center. PATIENT SELECTION CRITERIA: Adults >50 years old sustaining comminuted OTA/AO 33-A2 or 33-A3 DFPF treated with either DP or a single distal femur locking plating (DFLP). Patients with simple 33-A1 fractures were excluded. Prior to 2018, patients underwent DFLP after which the treatment of choice became DP. OUTCOME MEASURES AND COMPARISONS: Reoperation rate, alignment, and complications. RESULTS: 34 patients treated with DFLP and 38 with DP met inclusion and follow up criteria. Average follow up was 18.2 ± 13.8 months in the DFLP group and 19.8 ± 16.1 months in the DP group ( P = 0.339). The average patient age in the DFLP group was 74.8 ± 7.3 years compared to 75.9 ± 11.3 years in the DP group. There were no statistical differences in demographics, fracture morphology, loss of reduction, or reoperation for any cause ( P >.05). DP patients were more likely to be weight bearing in the twelve-week postoperative period ( P <0.001) and return to their baseline ambulatory status ( P = 0.004) compared to DFLP patients. CONCLUSIONS: Dual plating of distal femoral periprosthetic fractures maintained coronal alignment with a low reoperation rate even with immediate weight bearing and these patients regained baseline level of ambulation more reliably as compared to patients treated with a single distal femoral locking plate. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
Assuntos
Fraturas Femorais Distais , Fraturas do Fêmur , Fraturas Periprotéticas , Adulto , Humanos , Idoso , Idoso de 80 Anos ou mais , Pessoa de Meia-Idade , Estudos Retrospectivos , Fraturas Periprotéticas/cirurgia , Fraturas Periprotéticas/etiologia , Fraturas do Fêmur/cirurgia , Fraturas do Fêmur/etiologia , Fixação Interna de Fraturas/efeitos adversos , Placas Ósseas , Fêmur , Resultado do TratamentoRESUMO
OBJECTIVE: To investigate open science practices in research published in the top 5 sports medicine journals from May 1, 2022, and October 1, 2022. DESIGN: A meta-research systematic review. LITERATURE SEARCH: Open science practices were searched in MEDLINE. STUDY SELECTION CRITERIA: We included original scientific research published in one of the identified top 5 sports medicine journals in 2022 as ranked by Clarivate: (1) British Journal of Sports Medicine, (2) Journal of Sport and Health Science, (3) American Journal of Sports Medicine, (4) Medicine and Science in Sports and Exercise, and (5) Sports Medicine-Open. Studies were excluded if they were systematic reviews, qualitative research, gray literature, or animal or cadaver models. DATA SYNTHESIS: Open science practices were extracted in accordance with the Transparency and Openness Promotion guidelines and patient and public involvement. RESULTS: Two hundred forty-three studies were included. The median number of open science practices in each study was 2, out of a maximum of 12 (range: 0-8; interquartile range: 2). Two hundred thirty-four studies (96%, 95% confidence interval [CI]: 94%-99%) provided an author conflict-of-interest statement and 163 (67%, 95% CI: 62%-73%) reported funding. Twenty-one studies (9%, 95% CI: 5%-12%) provided open-access data. Fifty-four studies (22%, 95% CI: 17%-27%) included a data availability statement and 3 (1%, 95% CI: 0%-3%) made code available. Seventy-six studies (32%, 95% CI: 25%-37%) had transparent materials and 30 (12%, 95% CI: 8%-16%) used a reporting guideline. Twenty-eight studies (12%, 95% CI: 8%-16%) were preregistered. Six studies (3%, 95% CI: 1%-4%) published a protocol. Four studies (2%, 95% CI: 0%-3%) reported an analysis plan a priori. Seven studies (3%, 95% CI: 1%-5%) reported patient and public involvement. CONCLUSION: Open science practices in the sports medicine field are extremely limited. The least followed practices were sharing code, data, and analysis plans. J Orthop Sports Phys Ther 2023;53(12):1-13. Epub 20 October 2023. doi:10.2519/jospt.2023.12016.
Assuntos
Exercício Físico , Medicina Esportiva , Humanos , ConfidencialidadeRESUMO
Due to the declining number of scientifically trained physicians and increasing demand for high-quality literature, our institution pioneered a seven-year Physician Scientist Training Program (PSTP) to provide research-oriented residents the knowledge and skills for a successful academic career. The present study sought to identify orthopaedic surgeons with MD/PhD degrees, residency programs with dedicated research tracks, and to assess the effectiveness of the novel seven-year program in training prospective academic orthopaedic surgeons. Surgeons with MD/PhD degrees account for 2.3% of all 3,408 orthopaedic faculty positions in U.S. residency programs. During the last 23 years, our PSTP residents produced 752 peer-reviewed publications and received $349,354 from 23 resident-authored extramural grants. Eleven of our seven-year alumni practice orthopaedic surgery in an academic setting. The seven-year PSTP successfully develops clinically trained surgeon scientists with refined skills in basic science and clinical experimental design, grant proposals, scientific presentations, and manuscript preparation. (Journal of Surgical Orthopaedic Advances 31(3):144-149, 2022).
Assuntos
Internato e Residência , Ortopedia , Cirurgiões , Humanos , Estudos Prospectivos , Ortopedia/educação , Educação de Pós-Graduação em MedicinaRESUMO
Following low-energy distal radius fractures (DRF) patients rarely receive a bone health evaluation. The purpose of this survey was to investigate the attitudes and practices of American Society for Surgery of the Hand (ASSH) members regarding osteoporosis and low-energy DRF. An electronic survey was sent to 4,125 members of the ASSH. Physicians were asked about referral patterns, comfort level with labs and imaging related to bone health, and barriers. There were 475 responses (response rate 11.5%). Most respondents always (33.1%) or often (32.8%) talk about osteoporosis risk after low-energy DRF. Most respondents (87.6%) do not routinely order metabolic labs. Less than half knew of an available Fracture Liaison Service. Barriers to discussion included not enough time (32.6%), not comfortable with the topic (12.6%), and not within practice scope (33.3%). Respondents reported variable comfort levels discussing and implementing osteoporosis care in the setting of low-energy DRF. (Journal of Surgical Orthopaedic Advances 31(3):155-160, 2022).
Assuntos
Osteoporose , Fraturas do Rádio , Cirurgiões , Humanos , Estados Unidos , Fraturas do Rádio/cirurgia , Densidade Óssea , Osteoporose/complicações , Inquéritos e QuestionáriosRESUMO
The dimeric natural product montamine was originally reported as two N-feruloylserotonin (moschamine) units linked by a nitrogen-nitrogen bond, but our recent synthesis of this symmetrical diacyl hydrazide structure revealed this to be incorrect. We subsequently hypothesized that the moschamine subunits were linked through the indole C4 site and that montamine was structurally identical to 4,4'-bismoschamine, a known natural product present in safflower oil. However, given that authentic samples of both montamine and 4,4'-bismoschamine were unavailable and that the NMR data for the natural products were recorded in different solvents, we were unable to unequivocally prove this hypothesis. A recent publication that claims montamine and 4,4'-bismoschamine are not the same natural product prompts us to disclose our own findings on this matter. A biomimetic synthesis of 4,4'-bismoschamine was developed that hinged on oxidative coupling of N-Boc-serotonin followed by elaboration of the resulting 4,4'-dimer to the natural product. A detailed comparison of the NMR data for synthetic 4,4'-bismoschamine with that reported for montamine revealed that while the 1H NMR data were in good agreement, the 13C NMR data displayed some discrepancies. In light of this result, the NMR data for several literature compounds was analyzed, the results of which revealed that the upfield chemical shifts of the methylene protons in the 1H NMR of montamine is unique to 4,4'-bistryptamines, supporting our initial statement that montamine and 4,4'-bismoschamine are structurally equivalent. Given that the main differences in the 13C NMR data between montamine and synthetic 4,4'-bismoschamine occur at the quaternary carbons, we propose that these peaks have been misassigned from a 13C NMR spectrum that was obtained from an impure sample and/or the small amount of montamine (4 mg) isolated from the natural source.