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1.
Aesthetic Plast Surg ; 47(2): 825-832, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-36075983

RESUMEN

BACKGROUND: Fat transplantation supported by supplementation with ASCs has become a reliable procedure for treating soft tissue defects. However, the unpredictable survival rates for grafted fat remains a challenge with post-transplantation ischemia causing tissue loss. MiR126, which regulates VEGF signaling, is an endothelial cell-specific miRNA known to play an essential role in angiogenesis. We hypothesized that increased miR126 expression in grafted ASCs may promote fat survival within an autologous fat transfer model. METHODS: Rat adipose-derived stem cells were isolated, expanded ex vivo for three passages and then transduced with miR126. We used PCR to verify lentiviral transduction and ELISA to confirm VEGF expression. We then mixed autologous fat tissues from our rat model with transduced ASCs, augmented with a nonsense control or miR126 expression vector. These mixtures were used in the fat grafting procedure, completed via subcutaneous injection at three paravertebral points in each rat. Fat grafts were then harvested on days 4, 7, 14, and 28 post-transplant and evaluated for survival, neovascularization, and protein expression via western blot. RESULTS: VEGF expression levels in ASCs, Con-ASCs, and miR126-ASCs were not significantly different. However, miR126-ASCs experienced significantly improved survival on days 7, 14, and 28 when compared with the other groups. These ASCs also presented with the greatest capillary density on days 7, 14, and 28 post-transplantation as well as increased p-ERK and p-AKT expression when compared to the other groups. CONCLUSION: This data suggests that miR126 augmentation of ASCs may help to enhance the survival and angiogenic capacity of transplanted fat tissues, and that this augmentation was not dependent on VEGF but rather the activation of the ERK/AKT pathway. NO LEVEL ASSIGNED: This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. 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 .


Asunto(s)
Supervivencia de Injerto , MicroARNs , Ratas , Animales , Factor A de Crecimiento Endotelial Vascular/genética , Proteínas Proto-Oncogénicas c-akt/metabolismo , Tejido Adiposo/trasplante , Células Madre , MicroARNs/genética
3.
Dermatol Surg ; 42(3): 368-76, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26890801

RESUMEN

BACKGROUND: Xanthelasma palpebrarum (xanthelasma) is the most common type of cutaneous xanthoma, and many patients tend to seek medical treatments for cosmetic reasons. Many methods treating xanthelasma have been proposed, but none of these options can be regarded as a perfect solution. OBJECTIVE: To study and evaluate the intralesional injection treatment of xanthelasma with pingyangmycin, which has been widely used as a broad-spectrum antitumor antibiotic. MATERIALS AND METHODS: 21 lesions in 12 patients were treated by intralesional pingyangmycin. Photographs were taken before and after each treatment session. Patients were followed up for 7 to 36 months. RESULTS: All patients except one received satisfactory results after up to 2 sessions. Only 1 patient had a local recurrence 1 year after the treatment. No severe complications such as infection, atrophy, ulceration, or scar were noticed. CONCLUSION: Intralesional pingyangmycin is a cheap, effective, and safe treatment for xanthelasma, which has been well accepted by patients.


Asunto(s)
Antibióticos Antineoplásicos/administración & dosificación , Bleomicina/análogos & derivados , Enfermedades de los Párpados/tratamiento farmacológico , Enfermedades de la Piel/tratamiento farmacológico , Xantomatosis/tratamiento farmacológico , Adulto , Antibióticos Antineoplásicos/efectos adversos , Bleomicina/administración & dosificación , Bleomicina/efectos adversos , Femenino , Estudios de Seguimiento , Humanos , Inyecciones Intralesiones , Masculino , Persona de Mediana Edad , Fotograbar , Recurrencia , Resultado del Tratamiento
4.
Surg Radiol Anat ; 38(9): 1075-1081, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27083588

RESUMEN

BACKGROUND: To delineate the distribution and course layer of the perforator vessels using a modified technique. METHODS: Twelve perforator flaps were obtained from the crura of six fresh adult cadavers. The flaps were randomized into three groups (n = 4 per group): the full-thickness flap group; the deep fascia-free flap group, and the subcutaneous adipose layer-free group. The flaps were smoothened on a silk screen on a batten frame and the isolated flaps were perfused at a perfusion pressure of 140 mmHg for 10 min via the trunk of the posterior tibial artery. Perforator flaps were photographed using a digital camera and radiographed using a mammography device. The imaging data were processed by digital software system. RESULTS: The mean number of the posterior tibial artery perforator was 4.17 ± 0.94. The three relatively constant perforators varied in the projection points as well as the diameter and the length. The vascular branches and courses of the perforators were clearly visible on the mammograms. Elimination of all the deep fascia or the subcutaneous adipose tissues in the distal portion had no significant impact on the blood supply of posterior tibial artery perforator flaps while the vascular areas of the artery perforators were significantly reduced after the subcutaneous adipose tissue was eliminated in the proximal portion. CONCLUSIONS: We developed an effective modified technique for delineating the vascular territory on perforator flaps of different thicknesses. Our results provide significant guidance for clinical surgeons by providing them with more detailed anatomical knowledge of perforator flaps.


Asunto(s)
Colgajo Perforante , Arterias Tibiales/anatomía & histología , Adulto , Humanos
5.
World J Urol ; 33(12): 2115-23, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25910476

RESUMEN

PURPOSE: Construction of a neourethra is always considered to be a difficult part in phalloplasty, especially for the female-to-male (FTM) transsexual patients. We report our experience with prefabricated pars pendulans urethrae using vaginal mucosal graft for phalloplasty in FTM transsexuals. MATERIALS AND METHODS: We retrospectively reviewed notes on the 22 FTM patients treated with pedicled-flap phalloplasty with prefabricated pars pendulans urethrae using vaginal mucosal graft between January 2008 and December 2012. Surgical outcome, urological function, and complications were recorded. Histological difference between normal mucosa and skin, and pathological changes of vaginal mucosal graft were also observed. RESULTS: All the reconstructive penis survived, and patients could void in a standing position finally at a median follow-up of 25.4 ± 6.0 months. Urethral fistula and urethral stricture rates were 31.8 % (7/22 patients) and 4.5 % (1/22 patients), respectively. The occurrence of the urethral stricture was remarkably low compared with previous reports. Our histological results also showed a pronounced similarity between vaginal and buccal mucosa. Morphologically, they resembled urethral epithelium more closely than the forearm skin. Following the free transfer, the vaginal mucosal graft also showed a good revascularization and the inflammatory reaction and the extent of fibrosis of the mucosa decreased to the normal level after a 6-month prefabrication. CONCLUSION: With prefabrication of vaginal mucosal graft, we reconstruct a competent phallic neourethra in these FTM transsexuals. According to its histological similarities and source character, the vaginal mucosa is the excellent substitute material for promising urethral reconstruction in FTM transsexuals.


Asunto(s)
Órganos Bioartificiales , Pene , Cirugía de Reasignación de Sexo , Transexualidad/cirugía , Uretra/cirugía , Vagina , Adulto , Femenino , Humanos , Masculino , Membrana Mucosa , Estudios Retrospectivos , Adulto Joven
6.
J Anat ; 225(1): 12-8, 2014 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24836406

RESUMEN

The purposes f this study were to (i) explore the possibility of splitting the selected forearm muscles into separate compartments in human subjects; (ii) quantify the architectural properties of each neuromuscular compartment; and (iii) discuss the implication of these properties in split tendon transfer procedures. Twenty upper limbs from 10 fresh human cadavers were used in this study. Ten limbs of five cadavers were used for intramuscular nerve study by modified Sihler's staining technique, which confirmed the neuromuscular compartments. The other 10 limbs were included for architectural analysis of neuromuscular compartments. The architectural features of the compartments including muscle weight, muscle length, fiber length, pennation angle, and sarcomere length were determined. Physiological cross-sectional area and fiber length/muscle length ratio were calculated. Five of the selected forearm muscles were ideal candidates for splitting, including flexor carpi ulnaris, flexor carpi radials, extensor carpi radialis brevis, extensor carpi ulnaris and pronator teres. The humeral head of pronator teres contained the longest fiber length (6.23 ± 0.31 cm), and the radial compartment of extensor carpi ulnaris contained the shortest (2.90 ± 0.28 cm). The ulnar compartment of flexor carpi ulnaris had the largest physiological cross-sectional area (5.17 ± 0.59 cm(2)), and the ulnar head of pronator teres had the smallest (0.67 ± 0.06 cm(2)). Fiber length/muscle length ratios of the neuromuscular compartments were relatively low (average 0.27 ± 0.09, range 0.18-0.39) except for the ulnar head of pronator teres, which had the highest one (0.72 ± 0.05). Using modified Sihler's technique, this research demonstrated that each compartment of these selected forearm muscles has its own neurovascular supply after being split along its central tendon. Data of the architectural properties of each neuromuscular compartment provide insight into the 'design' of their functional capability. In addition to improving our understanding of muscle anatomy and function, elucidation of forearm neuromuscular compartments architecture may ultimately provide information useful for selection of muscle subdivisions used in tendon transfer.


Asunto(s)
Antebrazo/anatomía & histología , Músculo Esquelético/anatomía & histología , Adulto , Cadáver , Femenino , Antebrazo/inervación , Humanos , Masculino , Persona de Mediana Edad , Fibras Musculares Esqueléticas/fisiología , Músculo Esquelético/inervación , Transferencia Tendinosa
7.
Cancer Cell Int ; 14(1): 16, 2014 Feb 25.
Artículo en Inglés | MEDLINE | ID: mdl-24564864

RESUMEN

Liver X receptors (LXRs) are nuclear receptors that function as ligand-activated transcription factors regulating lipid metabolism and inflammation. Recent discoveries found LXRs could regulate tumor growth in a variety of cancer cell lines. In this study, we investigated the effect of LXR activation on melanoma cell proliferation and apoptosis both in vitro and in vivo. Treatment of B16F10 and A-375 melanoma cells with synthetic LXR agonist T0901317 significantly inhibited the proliferation of melanoma cells in vitro. Meanwhile, T0901317 induced the apoptosis of B16F10 melanoma cells in a dose-dependent manner. Furthermore, western blot assay showed that the pro-apoptotic effect of T0901317 on B16F10 melanoma cells was mediated through caspase-3 pathway. Oral administration of T0901317 inhibited the growth of B16F10 melanoma in C56BL/6 mice. Altogether, this study demonstrates the critical role of LXRs in the regulation of melanoma growth and presents the LXR agonist T0901317 as a potential anti-melanoma agent.

8.
J Cosmet Dermatol ; 22(3): 937-944, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-36575894

RESUMEN

BACKGROUND: Age-related changes to the face pertinent anatomy and important aspects of autologous fat grafting have been widely applied in facial rejuvenation. Various types of autologous fat products (Macrofat, Microfat, SEFF, nanofat, and SVF-gel) with different properties and applicabilities have been introduced and available for surgeons. METHODS: Key differences between common techniques for fat processing and infiltration. Develop a plan for patients based on site-specific facial anatomical zones, we suggested a pyramidal multiple-theory (multi-type, multi-method and multi-layer) for facial fat grafting. Based on the complicated mechanism of the face decrepitude in different layers of facial soft tissue, autologous fat products with various particle sizes and components into different layers. RESULTS: Fifty-eight patients underwent this facial fat grafting strategy from June 2020 to Jan 2022. All achieved cosmetic improvements, with higher patients' satisfaction, and minor complications. Our facial fat grafting strategy takes advantage of different fat products and is able to address the physiological tissue changes during aging, more properly and targetedly, than the traditional facial fat grafting. CONCLUSIONS: Fat grafting to the face aids in volume restoration and rejuvenation, thereby addressing soft-tissue atrophy associated with the aging face, acquired conditions, or congenital malformations. The technique described as "lipo-tumescence" has been successfully used in the breast and other regions of the body that have radiation damage and is discussed in this article specifically for the face and neck.


Asunto(s)
Ritidoplastia , Envejecimiento de la Piel , Humanos , Tejido Adiposo/trasplante , Cara , Ritidoplastia/métodos , Envejecimiento , Rejuvenecimiento
9.
J Plast Reconstr Aesthet Surg ; 86: 72-78, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37716252

RESUMEN

BACKGROUND: The predictability and concordance between simulated and actual outcomes in rhinoplasty are uncertain. Here, we introduce a suture positioning technique (SPT), a simple and low-cost method to minimize the gap between the simulated and actual outcomes of rhinoplasty. METHODS: Seventy patients were enrolled in this study between January 2018 and January 2021. Preoperative simulations were performed using Adobe Photoshop. The control group underwent surgery using simulation and intuition. In the SPT group, sutures were used to assist in the preoperative identification of the ideal nasal tip position. The SPT effectiveness was tested by measuring the nasal parameters and using the patient's subjective satisfaction questionnaire at T1 (Time 1, immediately postoperatively) and T2 (Time 2, at least 1 year postoperatively). RESULTS: The intraclass correlation coefficient test showed a satisfactory correlation between simulation and postoperative outcomes in both groups. However, the SPT group had a higher correlation than the control group, especially for the nasal length (16% higher at T1 and 15% higher at T2). The mean absolute difference (MAD) between the outcomes and simulation indicated that the MAD of nasal tip projection between T2 and simulation and MAD of nasal length between T1 (or T2) and simulation were statistically significant between groups. Additionally, the SPT group was more satisfied with the postoperative outcomes and were consistent with the preoperative simulation. CONCLUSION: This study demonstrated the effectiveness of SPT in intraoperative quality control. This technique may be adopted by surgeons to achieve good concordance between simulated and actual surgical outcomes.


Asunto(s)
Rinoplastia , Humanos , Rinoplastia/métodos , Resultado del Tratamiento , Estética , Nariz/cirugía , Suturas , Tabique Nasal/cirugía
10.
World J Surg ; 35(10): 2315-22, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21796467

RESUMEN

BACKGROUND: To present our experience of vaginal reconstruction with the use of a pedicled ileum segment and laparoscope assistance, and to analyze its complications and long-term anatomic and functional results. METHODS: The abdominal and perineal approaches were performed simultaneously with the patient in a special position. Under the guidance of laparoscopy, the target ileal segment was harvested and transposed down to the perineum through an artificial tunnel between the bladder and the rectum. A silicon vaginal tutor was introduced into the vaginal cavity and maintained all day long for 2-3 months. The complications and the anatomical and functional results were summarized and analyzed. RESULTS: From February 2002 to June 2010, 82 patients underwent laparoscope-assisted total vaginal reconstruction with a pedicled ileum segment at our department. Complications developed in 16 of 82 patients, including rectum and/or bladder injury during operation, acute renal failure, delayed healing of the ileocutaneous anastomosis, introital stenosis, and partial or complete intestinal obstruction. The abdominal cutaneous scar was acceptable after the surgery. The vulva was not altered, which was especially significant for patients with congenital vaginal atresia. The neovagina was patent, soft, moist, and flexible. The mean width and depth of the neovagina at the latest postoperative visit measured 3.2 and 15 cm, respectively. CONCLUSIONS: The favorable long-term anatomical and functional results demonstrate that our technique is ideal for patients with congenital vaginal atresia or patients who need secondary vaginal reconstruction. For the primary male-to-female transsexuals or hermaphrodites, it can be an alternative method for vaginal construction.


Asunto(s)
Íleon/trasplante , Laparoscopía , Vagina/anomalías , Vagina/cirugía , Adolescente , Adulto , Femenino , Procedimientos Quirúrgicos Ginecológicos/métodos , Humanos , Adulto Joven
12.
Muscle Nerve ; 42(1): 88-94, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20544911

RESUMEN

The nerve map of the human face, although important in guiding facial surgery, has not been well defined. In this study we applied a modified Sihler's technique to profile intramuscular innervation of human mimetic muscles. Six fresh cadaveric heads were used. The intramuscular distribution of the facial nerve in human mimetic muscles was visualized using a modified Sihler's technique. Modified Sihler's staining revealed a three-dimensional picture of the clearly purple-black intramuscular facial and sensory nerves. The nerve branching patterns of both facial halves were asymmetrical. None of the fine nerve branches crossed over the midline. The facial nerve branches divided into secondary rami and formed a mesh-like plexus before entering the target muscles at a right angle. The modified Sihler's technique can profile intramuscular innervation of human mimetic muscles. Our nerve map of the face offers valuable guidance for facial reanimation surgery, facial cosmetic surgery, and parotid surgery.


Asunto(s)
Técnicas Citológicas , Músculos Faciales/anatomía & histología , Músculos Faciales/inervación , Coloración y Etiquetado/métodos , Adulto , Cadáver , Colorantes , Nervio Facial/anatomía & histología , Femenino , Lateralidad Funcional/fisiología , Humanos , Masculino , Microcirugia , Persona de Mediana Edad , Terminaciones Nerviosas/ultraestructura
13.
Microsurgery ; 30(4): 307-13, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20063380

RESUMEN

The aim of this study was to investigate the correlation between contractile function recovery and changes of acetylcholine receptors (AChR) in a transferred muscle flap following reinnervation. Orthotopic transfer of the gracilis muscle flap with repair of its nerve was performed bilaterally in 48 rats. The rats were randomly divided into six experimental groups based on the time intervals for assessments (1, 4, 5, 10, 20, and 30 weeks). Sixteen gracilis muscle samples from eight rats without surgery were used as the controls. In each group, muscle contractile force and weight were measured (n = 16). The AChR numbers (n = 8) and subunits (epsilon and gamma) mRNA (n = 8) were examined using [(125)I]-alpha-bungarotoxin and fluorescent quantitative-PCR. The results showed the AChR numbers in the muscle flap increased from 4 to 20 weeks after reinnervation and correlated with recovery of the tetanic contraction force. However, correlation between the increase of AChR number with the specific tension (peak contractile force normalized to wet muscle weight) was only found from 4 to 10 weeks postoperatively. The expression of gamma-subunit mRNA increased at the early period after flap transfer and then decreased rapidly, whereas the epsilon-subunit mRNA recovered gradually since fourth week postoperatively. A small amount of gamma-subunit mRNA could still be detected at 30 weeks after surgery. In conclusion, following reinnervation of the transferred muscle flap, the contractile functional recovery is partially correlated to increase of the AChRepsilon. Our findings may provide evidence for further study of improving muscle function in functional reconstruction by targeting the AChR.


Asunto(s)
Contracción Muscular/fisiología , Músculo Esquelético/inervación , Músculo Esquelético/trasplante , Regeneración Nerviosa/fisiología , Receptores Colinérgicos/metabolismo , Colgajos Quirúrgicos/inervación , Análisis de Varianza , Animales , Femenino , Rechazo de Injerto , Supervivencia de Injerto , Modelos Animales , Contracción Muscular/genética , Músculo Esquelético/patología , Reacción en Cadena de la Polimerasa/métodos , Probabilidad , ARN Mensajero/genética , ARN Mensajero/metabolismo , Distribución Aleatoria , Ratas , Ratas Sprague-Dawley , Receptores Colinérgicos/genética , Recuperación de la Función , Colgajos Quirúrgicos/patología
14.
Surg Radiol Anat ; 32(7): 637-46, 2010 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-20229172

RESUMEN

PURPOSE: Abductor hallucis, latissimus dorsi, gracilis, rectus abdominis, sartorius and pectoralis minor are muscle flaps that are commonly used in clinic, but their intramuscular innervation has seldom been systematically investigated. METHODS: Five Chinese fresh human cadavers were included in the study and abductor hallucis, latissimus dorsi, gracilis, rectus abdominis, sartorius and pectoralis muscles were dissected. After gross anatomy measurement, the specimens were then stained by Sihler's staining technique. Intramuscular innervation was observed and the number as well as distribution was recorded. RESULTS: Intramuscular nerves were clearly visualized by Sihler's staining technique. Based on the shape and muscle-tendon morphology, Lim et al. in Muscle Nerve 29:523-530, 2004 grouped the muscles into trapezoidal-shaped (type I), spindle-shaped (type II), and combination-shaped (type III). According to Lim's study the abductor hallucis was a type IIb muscle and was divided into two compartments by the distal tendon. Latissimus dorsi was a type I muscle, divided into 3-4 compartments by intramuscular nerve branches. Gracilis was a type IIa muscle and the distal part was divided into two compartments by intramuscular nerve branches. Rectus abdominis was a type III muscle and the four bellies comprised four compartments, each of which could be designated as a subunit. Sartorius was a type II muscle and it could be divided into 2-3 compartments along the long axis. Pectoralis minor was a type I muscle that was divided into two compartments by extramuscular terminal nerves. CONCLUSIONS: The six muscles are divided into several compartments by the tendon or nerve branches, and all of them make good donor tissue for muscle compartment transfer in reconstructive surgery.


Asunto(s)
Músculo Esquelético/inervación , Colgajos Quirúrgicos/inervación , Anciano , Cadáver , China , Disección , Femenino , Humanos , Masculino , Persona de Mediana Edad , Coloración y Etiquetado
15.
Surg Radiol Anat ; 32(1): 3-8, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19597754

RESUMEN

PURPOSE: The concept of muscle subunits has been introduced for limb reconstruction and functional conservation of donor site, yet it requires thorough understanding of neurovascular anatomy of muscles. The present study provides neurovascular details of forearm skeletal muscles. METHODS: Twenty-eight forearms were dissected totally, ten for observing extramuscular nerve distribution, ten for observing intramuscular nerve distribution by modified Sihler's technique, and the other eight for observing intramuscular artery distribution by aqueous barium sulfate infusion. The forearm muscles were classified into three different types according to Lym's classification. Numbers of extramuscular and intramuscular nerves were counted and compared between the types. Intramuscular vascular distribution was also classified into three different types according to Mathes' method. Intramuscular vascular distribution was compared with nerve distribution as well. RESULTS: There were also some variations in the composition of muscular branches. Numbers of intramuscular nerve branches were significantly higher in muscle types IIa and III. Morphology and intramuscular neurovascular distribution of type II muscles are easy to split into two independent parts for functional muscular flap transfer according to morphology and intramuscular neurovascular distribution. CONCLUSIONS: The present study elucidated that flexor carpi ulnaris and radialis, extensor carpi ulnaris, and carpi radialis brevis were suitable for functional muscular transfer from several different insights, but the roles of pronator teres and supinator remained to be controversial. This study might be very helpful to plastic surgeons and anatomists.


Asunto(s)
Antebrazo/anatomía & histología , Músculo Esquelético/inervación , Adulto , Anciano , Femenino , Antebrazo/cirugía , Humanos , Masculino , Persona de Mediana Edad , Músculo Esquelético/irrigación sanguínea , Músculo Esquelético/trasplante
16.
Sci Rep ; 6: 27983, 2016 06 16.
Artículo en Inglés | MEDLINE | ID: mdl-27306838

RESUMEN

Neural/glial antigen 2 (NG2), a chondroitin sulfate proteoglycan, is significantly upregulated in a subset of glial cells in the facial motor nucleus (FMN) following CNS injury. NG2 is reported to promote the resulting inflammatory reaction, however, the mechanism by which NG2 mediates these effects is yet to be determined. In this study, we examined the changes in NG2 expressing microglial cells in the FMN in response to facial nerve axotomy (FNA) in mice. Our findings indicated that NG2 expression was progressively induced and upregulated specifically in the ipsilateral facial nucleus following FNA. To further investigate the effects of NG2 expression, in vivo studies in NG2-knockout mice and in vitro studies in rat microglial cells transfected with NG2 shRNAs were performed. Abolition of NG2 expression both in vitro and in vivo resulted in increased expression of neurotrophic factors (nerve growth factor and glial derived neurotrophic factor), decreased expression of inflammatory mediators (tumor necrosis factor-α and interleukin-1ß) and decreased apoptosis in the ipsilateral facial nucleus in response to FNA. Furthermore, we demonstrated the role of FAK in these NG2-induced effects. Taken together, our findings suggest that NG2 expression mediates inflammatory reactions and neurodegeneration in microglial cells in response to CNS injury, potentially by regulating FAK phosphorylation.


Asunto(s)
Antígenos/metabolismo , Quinasa 1 de Adhesión Focal/metabolismo , Regulación de la Expresión Génica , Procesamiento Proteico-Postraduccional , Proteoglicanos/metabolismo , Animales , Células Cultivadas , Traumatismos del Nervio Facial/patología , Núcleo Motor del Nervio Facial/fisiología , Ratones Noqueados , Fosforilación , Ratas
17.
J Am Coll Surg ; 217(3): 461-71, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23890841

RESUMEN

BACKGROUND: Cross-leg flaps are a good choice for reconstructing traumatized lower extremities, especially when free flaps cannot be used. In this article, we present our experience in the treatment of traumatic lower extremity wounds by using cross-leg flaps. STUDY DESIGN: A total of 56 patients suffering traumatic lower extremities were treated with cross-leg flaps. Patients with diabetes mellitus and those who were heavy smokers were also included in this study. RESULTS: Most flaps survived without complications. Flap necrosis occurred in 2 cases. The hospital stay was 20.0 ± 6.2 days and the flaps were divided at 13.3 ± 2.8 days. The diabetes patients were mostly elderly, and they had longer hospital stays and duration for flap division. Follow-up was an average of 16.2 ± 8.2 months. CONCLUSIONS: The cross-leg flap is an effective and simple method for treating traumatic lower extremity wounds. It should have priority over microsurgery, not just be an alternative to it.


Asunto(s)
Traumatismos de la Pierna/cirugía , Pierna/cirugía , Colgajos Quirúrgicos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Complicaciones de la Diabetes/cirugía , Femenino , Supervivencia de Injerto , Humanos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias , Estudios Retrospectivos , Fumar/efectos adversos , Resultado del Tratamiento
18.
Zhonghua Zheng Xing Wai Ke Za Zhi ; 29(2): 94-6, 2013 Mar.
Artículo en Zh | MEDLINE | ID: mdl-23772484

RESUMEN

OBJECTIVE: To investigate the effect of Reading man flap for the closure of round or elliptical-shaped defect. METHODS: Based on the asymmetric Z flaps, F1 (triangular flap) and F2 (rectangular flap) flaps were designed to cover the round or elliptical-shaped defects. The flaps size ranged from 0.8 cm x 0.8 cm to 9.0 cm x 8.0 cm. RESULTS: From 2008 to 2011, 32 cases were treated without infection or dog-ear deformity. Less than 5% of local necrosis happened in one flap, which healed spontaneously after dressing. Delayed healing happened in 5 cases. The scar after operation was inconspicuous. CONCLUSIONS: Reading man flap can be designed flexibly. It is a good option for the closure of round or elliptical-shaped defects.


Asunto(s)
Procedimientos de Cirugía Plástica/métodos , Trasplante de Piel , Colgajos Quirúrgicos , Adolescente , Adulto , Humanos , Masculino , Persona de Mediana Edad , Traumatismos de los Tejidos Blandos/cirugía , Adulto Joven
19.
Plast Reconstr Surg ; 129(2): 401-411, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22286423

RESUMEN

BACKGROUND: The arrangement and relationship of intramuscular nerves and blood vessels are critical to clinical physicians, but the majority of previous studies could not reflect them precisely. METHODS: In method 1, after rabbits were perfused with barium sulfate liquid silica gel, the specimen muscle was isolated and subjected to Sihler staining. The specimen muscles then underwent optical photography and molybdenum target radiography. The obtained photograph and the radiograph were then overlapped together to draw a map of intramuscular nerves and blood vessels. In method 2, after rabbits and child cadavers were perfused with semitransparent red liquid silica gel, the specimen muscle was isolated and subjected to Sihler staining. Finally, the specimen muscles were placed on an x-ray film viewer for photography. RESULTS: Both methods had ideal outcomes. Through digital subtraction angiography, a distribution map of intramuscular nerves and blood vessels could be obtained in method 1, whereas in the photographs taken through method 2, the intramuscular nerves were counterstained with dark blue and the intramuscular blood vessels were stained red, which was more precise and direct. In method 2, specimens could be made into stereoscopic models. CONCLUSIONS: These two methods that can simultaneously display intramuscular nerves and blood vessels have been significantly improved and lead to a good result. They also have their own advantages. When a muscle studied is small or flat, method 2 is recommended because of its conciseness and convenience. If the muscle is large, method 1 is applicable.


Asunto(s)
Anatomía/métodos , Disección/métodos , Músculo Esquelético/irrigación sanguínea , Músculo Esquelético/inervación , Animales , Cadáver , Humanos , Fotograbar , Conejos , Radiografía
20.
Plast Reconstr Surg ; 130(2): 325-335, 2012 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22842408

RESUMEN

BACKGROUND: In 1990, Jiang Hua introduced a new method using one-stage reconstruction with free abductor hallucis muscle transfer for dynamic reanimation of established unilateral facial paralysis. The authors present their experience with this procedure and analyze the postoperative complications and long-term functional and aesthetic outcomes. METHODS: From March of 1990 to March of 2010, 45 patients underwent the free abductor hallucis muscle transfer procedure in the authors' department. Forty-one were followed up for 54.6 months (range, 28 months to 17 years). The Toronto Facial Grading System and Facial Nerve Function Index were used to evaluate facial nerve function at 2 years after surgery and last follow-up. Complications and function of the donor foot were analyzed. RESULTS: No postoperative mortality was found. Complications occurred in four of 41 patients, including muscle loss, infection, hematoma, and hypertrophic scar. The others obtained satisfactory symmetric faces in the static state and in voluntary contraction of the transferred muscles. Mean values for the Toronto Facial Grading System (50.6±7.8) and the Facial Nerve Function Index (65.7±11.4 percent) were significantly higher at 2 years postoperatively in comparison with preoperative status (21.2±5.3 and 19.5±3.6 percent, respectively) (p<0.05). Long-term outcomes (Toronto Facial Grading System, 54.8±6.9; Facial Nerve Function Index, 79.4±9.6 percent) were awarded higher values than early outcomes shown at 2 years postoperatively (p<0.05). CONCLUSIONS: Free abductor hallucis muscle transfer is safe and effective in dynamic reanimation of longstanding unilateral facial paralysis. Favorable long-term results demonstrate that the authors' technique is an alternative method for facial reanimation. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.


Asunto(s)
Parálisis Facial/cirugía , Colgajos Tisulares Libres , Músculo Esquelético/trasplante , Procedimientos de Cirugía Plástica/métodos , Adolescente , Adulto , Femenino , Estudios de Seguimiento , Pie , Humanos , Masculino , Persona de Mediana Edad , Músculo Esquelético/irrigación sanguínea , Músculo Esquelético/inervación , Complicaciones Posoperatorias , Resultado del Tratamiento , Adulto Joven
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