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1.
Aesthetic Plast Surg ; 2023 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-37775576

RESUMO

BACKGROUND: Rhinoplasty, a leading cosmetic surgical procedure, often involves the use of opioids for postoperative pain management. This raises concerns due to potential opioid side effects and overprescription. Liposomal bupivacaine offers a promising alternative, but its efficacy in rhinoplasty remains under-investigated. This study assesses the impact of liposomal bupivacaine on postoperative pain and opioid consumption following rhinoplasty. METHODS: A retrospective study was conducted on patients undergoing rhinoplasty between January 2014 and September 2020. Postoperative pain scores were assessed at intervals up to 16 h, and opioid consumption was monitored. Patients were stratified into two groups: those receiving postoperative liposomal bupivacaine (Group 1) and those who did not (Group 2). RESULTS: No significant disparities in demographics or surgical specifics were identified between groups. Group 1 consistently reported lower pain scores, notably at 30 min (1.4 vs. 3.7, p = 0.0006) and 2 h (2.2 vs. 3.38, p = 0.0417). Cumulatively, Group 1's average pain score was 2.4, significantly lower than Group 2's 3.4 (p = 0.0023). Group 1 also demonstrated reduced opioid consumption, with oxycodone and oral morphine equivalent (OME) intake being notably lower (p = 0.005 and p = 0.0428, respectively). CONCLUSION: Liposomal bupivacaine presents as an efficacious alternative for post-rhinoplasty pain management, reducing both perceived pain and opioid consumption. While promising, the findings necessitate validation through larger, prospective studies considering the inherent limitations of this preliminary investigation. This study evaluates the efficacy of liposomal bupivacaine as a pain management strategy in postoperative care for rhinoplasty and septorhinoplasty procedures, with the potential to reduce reliance on opioids. The findings indicate that patients receiving liposomal bupivacaine experienced significantly lower pain scores postoperatively and less overall opioid consumption, thereby enhancing patient comfort and safety. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

2.
Plast Reconstr Surg ; 150(3): 496-509, 2022 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-35749734

RESUMO

BACKGROUND: The precise cause of and treatment for capsular contracture remains uncertain, at least partially because there is no reliable quantitative measurement tool. To address this, it is postulated that the surface area of an implant as defined by the surrounding pocket may provide a quantifiable variable that can be measured to evaluate the degree of capsular contracture. METHODS: A bench model for capsular contracture was developed. The surface area of a series of spherical test objects and noncontracted and contracted breast implants was measured using a wax-coating technique and three-dimensional reconstructions created from computed tomographic scan images. RESULTS: Comparison of the mathematically calculated surface areas to the wax and computed tomographic scan results for spheres of known dimension provided nearly identical values, documenting the accuracy of the two experimental methods. Comparison of the surface area measurements between the test groups showed that the average decrease in surface area for all implants was 20 percent, ranging from a high of 30.9 percent for a low-profile implant to a low of 14.1 percent for a high-profile implant. The anatomically shaped devices demonstrated nearly uniform degrees of surface area change over three different heights with volume and projection held relatively constant. CONCLUSIONS: The described bench model provides a useful tool for the study of capsular contracture. Surface area is a descriptive variable that can assess the degree of capsular contracture that is present. A classification system based on surface area is presented. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, V.


Assuntos
Implante Mamário , Implantes de Mama , Contratura , Implante Mamário/métodos , Implantes de Mama/efeitos adversos , Contratura/etiologia , Contratura/cirurgia , Previsões , Humanos , Contratura Capsular em Implantes/diagnóstico por imagem , Contratura Capsular em Implantes/etiologia
3.
Plast Reconstr Surg ; 149(1): 70-79, 2022 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-34936604

RESUMO

BACKGROUND: In breast augmentation, breast base diameter has been recognized as an important variable in implant selection. However, breast implant volume also has a tremendous impact on the final result. Previous methods of preoperative volume determination have been limited to external devices in a bra. Computer-based three-dimensional simulation technology now allows the physician to effectively communicate with the patient preoperatively regarding volume. METHODS: A cohort of 40 consecutive patients underwent routine breast augmentation with either anatomically shaped or round implants. Five methods of preoperative volume determination including the Crisalix three-dimensional computer imaging system (Crisalix Virtual Aesthetics, Lausanne, Switzerland), along with an associated virtual reality tool, were used to assess the preoperative desires of the patients. A postoperative questionnaire was used to assess patient satisfaction with each volume determination method. RESULTS: Of the 40 patients, 100 percent were satisfied with their result; however, given the opportunity, 12 percent would have chosen a larger implant. The virtual reality tool and external sizers were shown to be the most effective in choosing an implant. The virtual reality tool was judged to be very helpful (62 percent), very accurate (78 percent), and important (88 percent) in helping patients choose their desired implant size. CONCLUSION: Prioritizing volume as an implant selection variable in breast augmentation results in a very high rate of patient satisfaction. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.


Assuntos
Implante Mamário/métodos , Implantes de Mama , Imageamento Tridimensional/métodos , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Satisfação do Paciente , Desenho de Prótese
4.
Int Wound J ; 18(6): 902-908, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33783102

RESUMO

Chronic exudative wounds are frequently seen in hospitalised patients, consuming hospital resources and leading to increased morbidity. Negative-pressure therapy (NPWT) with topical instillation "NPWTi" may be used to improve the wound healing process, with the unique features (removal of wound exudate, edema reduction, promotion of tissue perfusion and granulation tissue formation, as well as drawing the edges of the wound to facilitate, in addition to the cyclic cleansing mechanism). This report is a descriptive study of our experience with NPWTi on complex infected orthopaedic wounds as a potential method to decrease the need for multiple surgical debridements required for the closure of such wounds. A prospective observational study was conducted. Twenty patients with complex infected orthopaedic wounds were enrolled in our study. These patients were consulted by the Bone and Joint Infection Service and enrolled to receive NPWTi intraoperatively and to be used during their inpatient stay. Twenty patients with 20 complex infected lower limb wounds were included in our study. Of all the 20 wounds, the etiology was post-surgical in 80% (n = 16) and post-traumatic in 20% (n = 4). None of the patients received previous treatment with conventional NPWT before participation in the study. There were 11 males (55%) and 9 females (45%) with an average age of 57 years (22-83). All wounds were located in the lower limbs, with 25% leg (n = 5), 20% thigh (n = 4), 20% knee (n = 4), 20% foot (n = 4), 10% heel (n = 2), and 5% ankle (n = 1). The average length of treatment with NPWTi was 5.2 days (2-10). Successful wound closure within 6 weeks was achieved in 65% of the cases (n = 13). Of the closed wounds (n = 13), 54% (n = 7) were closed primarily and 46% (n = 6) were closed by secondary procedures (skin graft or skin flap). NPWTi is still considered a novel technique that can be used in the management of complex wounds, and the goal of this prospective study is to report our experience with NPWTi in the management of complex infected orthopaedic lower limb wounds. Randomised control studies with optimally matched wounds comparing NPWTi to the conventional methods of treatment are warranted.


Assuntos
Tratamento de Ferimentos com Pressão Negativa , Ortopedia , Infecção dos Ferimentos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Irrigação Terapêutica , Infecção dos Ferimentos/terapia
5.
Microsurgery ; 41(6): 557-561, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33580717

RESUMO

Targeted muscle reinnervation enables native muscles to send electromyographic signals to myoelectric receptors, which drive movements in a prosthesis. This system requires voluntary contracture of muscles for sequential control of powered prosthetic joints. This report describes a surgical solution for cases where the chest wall is depleted of muscle targets. A 13-year-old boy with left forequarter amputation and pectoralis major resection as a result of extended necrotizing facilities 8 years prior received a neurotized free Vertical Rectus Abdominus Mycocutaneous (VRAM) flap (28 × 10 cm) designed to produce myoelectric signals, reduce pain, and provide stability for prosthetic fitting. Five intercostal nerves from the VRAM were coapted to portions of the brachial plexus to create a myoelectric interface for targeted muscle reinnervation. The postoperative course was uneventful. At 39 months of follow-up, the patient gained control of the transferred VRAM and was able to operate a custom-fitted myoelectric prosthesis together with contraction of the ipsilateral infraspinatus muscle. The neurotized VRAM transfer created a neural interface in an area with depleted neuromuscular targets while decreasing pain and adding tissue bulk for proper prosthesis fitting. Such a surgical strategy may have applications in other areas of the body.


Assuntos
Membros Artificiais , Transferência de Nervo , Procedimentos de Cirurgia Plástica , Adolescente , Amputação Cirúrgica , Humanos , Masculino , Músculo Esquelético/cirurgia
6.
Aesthetic Plast Surg ; 44(6): 2032-2040, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32767036

RESUMO

BACKGROUND: Pyoderma gangrenosum (PG) is a rare inflammatory cutaneous disorder. Although PG is a diagnosis of exclusion, prompt recognition is essential to attain the desired outcomes. From an aesthetic standpoint, this is especially critical with breast involvement and other body segments. We present a consecutive case series of four patients who developed PG following breast surgery and responded to early intervention. METHODS: A chart review identified four patients who were identified as having developed PG after either aesthetic or reconstructive breast surgery. Their histories, associated risk factors, diagnosis, course of treatment, and results were documented. The PubMed database was then searched to find the literature for comparison. RESULTS: The average time from surgery to the onset of symptoms was 11 days, and the average time from the onset of symptoms to the correct diagnosis of PG was 41 days. The average length of steroid therapy was 25 days. The average time from the initiation of steroids to complete wound closure was 51 days. The average time from the onset of symptoms to complete wound closure bilaterally was 87 days. All wounds healed with conservative management. CONCLUSION: Postsurgical PG is a rare but recognized cause of postoperative wound breakdown in patients who have undergone plastic surgery procedures to the breast. Early recognition and treatment can facilitate prompt reversal of the inflammatory process leading to complete wound healing and limitation of the morbidity that can be associated with the disease. LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .


Assuntos
Neoplasias da Mama , Mamoplastia , Procedimentos de Cirurgia Plástica , Pioderma Gangrenoso , Humanos , Mamoplastia/efeitos adversos , Mastectomia/efeitos adversos , Pioderma Gangrenoso/diagnóstico , Pioderma Gangrenoso/tratamento farmacológico , Pioderma Gangrenoso/etiologia , Cicatrização
8.
J Surg Oncol ; 119(8): 1047-1052, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30950070

RESUMO

BACKGROUND: The Goldilocks mastectomy procedure involves local contouring of completely autologous breast tissue created by preserving and de-epithelializing the residual mastectomy flaps. The purpose of this study was to provide outcomes data for 96-Goldilocks mastectomy procedures analyzing indications, complications, relevant comorbidities, and adjuvant cancer treatment impacting reconstructive and aesthetic outcomes. METHODS: Comprehensive review of every patient who underwent Goldilocks mastectomy from 2012 to 2018 included relevant medical and surgical comorbidities, as well as complication profiles. Aesthetic outcomes were also assessed in those with postoperative imaging available. RESULTS: A total of 53 patients (96 breasts) were included in this study. Bilateral cases consisted of 81.1% of the total cohort (n = 86 cases), and 18.9% (n = 10 cases) were unilateral procedures. Mean age at the time of reconstruction was 55.8 (33-77) years. Mean body mass index (BMI) at the time of reconstruction was 33.7 (19.2-54.6). The overall complication rate was 9.38% (seroma = 2, hematoma = 1, cellulitis = 2, wound dehiscence = 3, and operating room take back = 1). CONCLUSIONS: Goldilocks breast reconstruction is a safe, effective option in patients with higher than average BMI or excess local breast tissue, or in patients meeting these criteria preferring a single-stage reconstruction. This study qualifies its use in patients with higher than average risk factors for more extensive reconstructive modalities.


Assuntos
Neoplasias da Mama/cirurgia , Mamoplastia/métodos , Mastectomia/métodos , Adulto , Idoso , Neoplasias da Mama/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Retrospectivos , Resultado do Tratamento
9.
J Reconstr Microsurg ; 35(6): 425-429, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30658351

RESUMO

BACKGROUND: The purpose of this study is to describe our experience and outcomes in oncoplastic pelvic reconstruction for patients who underwent either vertical rectus abdominis musculocutaneous (VRAM) or omental flap following abdominoperineal resection (APR) at a single tertiary care institution. METHODS: All patients who underwent pelvic reconstruction following APR with either VRAM or omental flaps from January 1992 to January 2017 were retrospectively reviewed. Patient demographics and relevant comorbidities including chemotherapy and radiation therapy data were collected and analyzed. In addition, margin status at the time of oncologic resection was analyzed. Flap-specific data were collected for each approach. Oncologic data collected included cancer type, stage at time of APR, and rate of tumor recurrence within the flap. RESULTS: A total of 562 patients were identified who underwent pelvic reconstruction with either VRAM or omental pedicle flaps. Of these, 274 (48.8%) underwent VRAM reconstruction and 288 (51.2%) underwent omental flap reconstruction. All margins were negative at time of cancer ablation surgery. Complications data included: seroma (VRAM = 2 [0.36%]; omentum = 32 [5.69%], p < 0.0001), wound dehiscence (VRAM = 31 [5.52%]; omentum = 17 [3.02%], p = 0.022), abscess (VRAM = 4 [0.71%]; omentum = 27 [4.8%], p < 0.0001), cellulitis (VRAM = 2 [0.36%]; omentum = 10 [1.78%], p = 0.025). Statistical comparison of tumor recurrence between these two reconstructive approaches showed a significantly higher recurrence rate in omental flaps compared with VRAM flaps (p = 0.000127). CONCLUSION: The results of this study suggest a significantly higher tumor recurrence rate in omental flap pelvic reconstruction compared with VRAM flaps. This knowledge has the potential to influence surgical planning and flap selection in pelvic reconstruction.


Assuntos
Neoplasias Abdominais/cirurgia , Omento/transplante , Diafragma da Pelve/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Neoplasias Retais/cirurgia , Reto do Abdome/transplante , Retalhos Cirúrgicos/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Complicações Pós-Operatórias , Estudos Retrospectivos
10.
J Hand Surg Eur Vol ; 44(2): 161-166, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29991339

RESUMO

Ehlers-Danlos Syndrome is a connective tissue disorder that results in joint and generalized tissue hyperlaxity, predisposing patients to early onset arthritis. An institutional database spanning 1999-2016 was reviewed for all patients with symptomatic carpometacarpal arthritis and coexisting Ehlers-Danlos Syndrome, resulting in 14 thumbs amongst nine patients followed clinically for a median of 5.9 years (range 1-15). Patients managed non-operatively demonstrated stable subjective pain and trended towards decreased range of motion over time, whereas patients managed operatively had significant improvements in pain and trended towards increased grip strength. Our findings suggest that patients with Ehlers-Danlos-associated carpometacarpal arthritis can be successfully managed both operatively and non-operatively and that patients with pain refractory to conservative therapy may benefit from relief and increased hand strength following surgical intervention. Level of evidence: IV.


Assuntos
Artrite/terapia , Articulações Carpometacarpais/cirurgia , Síndrome de Ehlers-Danlos/fisiopatologia , Polegar/cirurgia , Adulto , Anti-Inflamatórios não Esteroides/uso terapêutico , Artrite/fisiopatologia , Artrodese , Artroplastia de Substituição , Articulações Carpometacarpais/fisiopatologia , Tratamento Conservador , Feminino , Glucocorticoides/uso terapêutico , Força da Mão/fisiologia , Humanos , Injeções Intra-Articulares , Masculino , Pessoa de Meia-Idade , Músculo Esquelético/transplante , Manejo da Dor , Amplitude de Movimento Articular/fisiologia , Descanso , Estudos Retrospectivos , Contenções , Polegar/fisiopatologia , Trapézio/cirurgia
13.
Craniomaxillofac Trauma Reconstr ; 8(3): 179-89, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26269725

RESUMO

This article aims to demonstrate an individualized approach to an elderly patient requiring scalp reconstruction, to describe the methodology in flap selection, lessons learned, and report outcomes. A retrospective review of a single surgeon's experience of scalp reconstruction (E. D. R.) using free tissue transfer from 2005 to 2011, in patients older than 70 years, was completed. A total of eight patients met the inclusion criteria, five males and three females, with a mean age of 80.4 years (range, 73-92). Free tissue transfer achieved 100% soft tissue coverage. Six of the eight patients required cranioplasty. The mean size calvarial defect was 92 cm(2) (range, 35-285 cm(2)). The mean flap size was 117.6 cm(2) (range, 42-285 cm(2)). Free flaps included three ulnar, three anterolateral thigh, one latissimus dorsi, and one thoracodorsal perforator flap. The mean follow-up time was 18.4 months (range, 3-46 months). Donor site morbidity was minimal. Mortality was 0%. Immediate flap failure was 0%. Other complications occurred in six of the eight patients. Mean revisionary procedures were 1.25 procedures per patient. It was concluded that chronological age does not increase mortality or catastrophic flap complications; however, morbidity is increased in the elderly and revisionary surgery is likely.

14.
Plast Reconstr Surg ; 136(3): 559-567, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25989303

RESUMO

BACKGROUND: The implications of allograft skin and mucosal biopsy findings on classification of rejection and treatment remain unclear. METHODS: Following facial allotransplantation, scheduled surveillance allograft skin and mucosal biopsy specimens were obtained. Clinical concern for acute rejection prompted biopsies off schedule. Compilation of biopsy results, Banff grading, immunosuppression, and clinical correlation were critically reviewed for a 2-year follow-up. RESULTS: A total of 39 biopsy specimens at 21 time points were obtained for analysis, including allograft skin (n = 21), mucosa (n = 17), and a lesion (n = 1). The patient had three episodes of acute rejection warranting treatment. Discordance between skin and mucosa occurred in 55.6 percent of biopsy specimens (p = 0.01). Mucosa concordance with the clinical evaluation occurred in 38.9 percent of biopsy specimens (p = 0.02), and skin concordance with clinical evaluation was present in 81 percent of biopsy specimens (p = 0.01). CONCLUSIONS: The clinical utility of mucosal biopsy remains elusive. The authors' experience suggests that mucosal or skin biopsy, alone, should not drive the decision-making process in treatment. Skin biopsies are more likely to confirm clinical suspicion of rejection than mucosal histology. Data from other institutions are lacking, and future reporting may help elucidate the role of mucosal and skin biopsy in facial allotransplantation. CLINICAL QUESTIONS/LEVEL OF EVIDENCE: Diagnostic, V.


Assuntos
Transplante de Face , Rejeição de Enxerto/patologia , Mucosa Bucal/patologia , Mucosa Nasal/patologia , Pele/patologia , Biópsia , Humanos , Masculino
15.
J Reconstr Microsurg ; 30(2): 115-20, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24163222

RESUMO

Use of the ulnar forearm flap (UFF) is limited by concerns for ulnar nerve injury and impaired perfusion in the donor extremity. Twenty UFFs were performed over a 6-year period. All patients underwent postoperative bilateral upper extremity arterial duplex studies. A subset of postoperative patients (n = 10) also had bilateral upper extremity sensory and motor evaluations, and functional evaluation via the Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH). Motor function was tested by digital and key grip dynamometry. Ulnar nerve sensation was tested by evaluation of one- and two-point perceived pressure thresholds and two-point discrimination using the Pressure-Specified Sensory Device (Sensory Management Services, LLC, Baltimore, MD). All UFFs were viable postoperatively. Mean follow-up was 28.8 months for vascular studies and 45.3 months for motor, sensory, and QuickDASH evaluations. Although mid and distal radial artery flow velocities were significantly higher in donor versus control extremities evaluated at less than 1 year postoperatively, there was no significant difference in extremities evaluated at later time points. Digital pressures, grip strength, key pinch strength, and ulnar sensation were equivalent between donor and control extremities. The mean QuickDASH score was 17.4 ± 23.8. The UFF can be harvested reliably and long-term follow-up shows no evidence of impaired vascular, motor, or sensory function in the donor extremity.


Assuntos
Antebraço/irrigação sanguínea , Neoplasias de Cabeça e Pescoço/cirurgia , Coleta de Tecidos e Órgãos/métodos , Sítio Doador de Transplante/fisiopatologia , Velocidade do Fluxo Sanguíneo , Avaliação da Deficiência , Feminino , Antebraço/inervação , Antebraço/cirurgia , Retalhos de Tecido Biológico/irrigação sanguínea , Sobrevivência de Enxerto , Força da Mão , Humanos , Masculino , Artéria Radial/fisiopatologia , Procedimentos de Cirurgia Plástica/métodos , Recuperação de Função Fisiológica , Limiar Sensorial , Inquéritos e Questionários , Fatores de Tempo , Nervo Ulnar/fisiopatologia
16.
Plast Reconstr Surg ; 124(5): 1571-1577, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-20009843

RESUMO

BACKGROUND: The management of composite oromandibular defects involving the posterolateral mandible and surrounding soft tissue remains a reconstructive challenge. Although bony reconstitution restores continuity of the mandible, osteocutaneous flaps sometimes do not provide adequate soft-tissue coverage of these postablative defects. The purpose of this study was to evaluate the use of soft-tissue flaps for extensive posterolateral oromandibular defects. METHODS: Consecutive patients who underwent reconstruction of composite oromandibular defects following posterolateral mandibulectomy between 1992 and 2006 were identified. Patient data were obtained from a prospectively maintained clinical database. Medical records were reviewed to characterize the extent of all postablative soft-tissue defects. Soft-tissue resection zones were defined as those involving the external cheek skin and/or lips, intraoral lining, tongue, retromolar trigone, palate, pharynx, and/or esophagus. RESULTS: In total, 76 patients were identified as having extensive posterolateral oromandibular defects reconstructed with soft-tissue flaps alone. In 62 percent of patients who underwent nonosseous free-tissue transfer, the oromandibular defect involved two or more soft-tissue zones. The most common flap used was the vertical rectus myocutaneous flap (n = 68). At the time of discharge, 54 percent of patients were on an oral diet. Sixty percent of patients had intelligible speech. Overall aesthetic outcome was good in 49 percent, fair in 21 percent, and poor in 30 percent of patients. CONCLUSIONS: Extensive composite defects of the posterolateral mandibular can be repaired effectively using soft-tissue flaps alone. When reconstructing a defect involving (1) the posterolateral mandible, overlying soft-tissues, and external skin and/or (2) the posterolateral mandible and two or more adjacent soft-tissue zones, the use of a soft-tissue flap alone can maximize success.


Assuntos
Mandíbula/patologia , Mandíbula/cirurgia , Boca/patologia , Boca/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Retalhos Cirúrgicos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/cirurgia , Criança , Pré-Escolar , Deglutição , Feminino , Fíbula , Humanos , Masculino , Mandíbula/fisiopatologia , Neoplasias Mandibulares/cirurgia , Pessoa de Meia-Idade , Boca/fisiopatologia , Neoplasias Bucais/cirurgia , Reto do Abdome , Estudos Retrospectivos , Fala , Resultado do Tratamento , Adulto Jovem
17.
Am J Physiol Heart Circ Physiol ; 295(5): H2113-27, 2008 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-18849330

RESUMO

Although clinical studies have identified scarring/fibrosis as significant risk factors for lymphedema, the mechanisms by which lymphatic repair is impaired remain unknown. Transforming growth factor -beta1 (TGF-beta1) is a critical regulator of tissue fibrosis/scarring and may therefore also play a role in the regulation of lymphatic regeneration. The purpose of this study was therefore to assess the role of TGF-beta1 on scarring/fibrosis and lymphatic regeneration in a mouse tail model. Acute lymphedema was induced in mouse tails by full-thickness skin excision and lymphatic ligation. TGF-beta1 expression and scarring were modulated by repairing the wounds with or without a topical collagen gel. Lymphatic function and histological analyses were performed at various time points. Finally, the effects of TGF-beta1 on lymphatic endothelial cells (LECs) in vitro were evaluated. As a result, the wound repair with collagen gel significantly reduced the expression of TGF-beta1, decreased scarring/fibrosis, and significantly accelerated lymphatic regeneration. The addition of recombinant TGF-beta1 to the collagen gel negated these effects. The improved lymphatic regeneration secondary to TGF-beta1 inhibition was associated with increased infiltration and proliferation of LECs and macrophages. TGF-beta1 caused a dose-dependent significant decrease in cellular proliferation and tubule formation of isolated LECs without changes in the expression of VEGF-C/D. Finally, the increased expression of TGF-beta1 during wound repair resulted in lymphatic fibrosis and the coexpression of alpha-smooth muscle actin and lymphatic vessel endothelial receptor-1 in regenerated lymphatics. In conclusion, the inhibition of TGF-beta1 expression significantly accelerates lymphatic regeneration during wound healing. An increased TGF-beta1 expression inhibits LEC proliferation and function and promotes lymphatic fibrosis. These findings imply that the clinical interventions that diminish TGF-beta1 expression may be useful in promoting more rapid lymphatic regeneration.


Assuntos
Linfangiogênese , Vasos Linfáticos/fisiopatologia , Linfedema/fisiopatologia , Pele/fisiopatologia , Fator de Crescimento Transformador beta1/metabolismo , Cicatrização , Administração Cutânea , Animais , Movimento Celular , Proliferação de Células , Cicatriz/metabolismo , Cicatriz/fisiopatologia , Colágeno/administração & dosagem , Procedimentos Cirúrgicos Dermatológicos , Endotélio Linfático/metabolismo , Endotélio Linfático/fisiopatologia , Feminino , Fibroblastos/metabolismo , Fibrose , Géis , Ligadura , Linfangiogênese/efeitos dos fármacos , Vasos Linfáticos/efeitos dos fármacos , Vasos Linfáticos/metabolismo , Vasos Linfáticos/patologia , Vasos Linfáticos/cirurgia , Linfedema/metabolismo , Linfedema/patologia , Linfedema/prevenção & controle , Macrófagos/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Proteínas Recombinantes/metabolismo , Pele/efeitos dos fármacos , Pele/metabolismo , Pele/patologia , Cauda , Fatores de Tempo , Cicatrização/efeitos dos fármacos
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