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1.
Am J Pathol ; 193(5): 510-519, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36740181

RESUMO

Fibrotic skin conditions, such as hypertrophic and keloid scars, frequently result from injury to the skin and as sequelae to surgical procedures. The development of skin fibrosis may lead to patient discomfort, limitation in range of motion, and cosmetic disfigurement. Despite the frequency of skin fibrosis, treatments that seek to address the root causes of fibrosis are lacking. Much research into fibrotic pathophysiology has focused on dermal pathology, but less research has been performed to understand aberrations in fibrotic epidermis, leading to an incomplete understanding of dermal fibrosis. Herein, literature on occlusion, a treatment modality known to reduce dermal fibrosis, in part through accelerating wound healing and regulating aberrant epidermal inflammation that otherwise drives fibrosis in the dermis, is reviewed. The review focuses on epidermal-dermal crosstalk, which contributes to the development and maintenance of dermal fibrosis, an underemphasized interplay that may yield novel strategies for treatment if understood in more detail.


Assuntos
Cicatriz Hipertrófica , Queloide , Humanos , Cicatriz Hipertrófica/patologia , Cicatriz Hipertrófica/terapia , Cicatrização/fisiologia , Pele/patologia , Epiderme/patologia , Queloide/patologia , Queloide/terapia , Fibrose
2.
Wound Repair Regen ; 2024 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-39157888

RESUMO

Dermal fibrosis is a consequence of damage to skin and is accompanied by dysfunction and cosmetic disfigurement. Improved understanding of the pathological factors driving skin fibrosis is critical to development of therapeutic modalities. Here, we describe that the Wnt signalling antagonist SFRP2 is upregulated in organotypic keratinocyte cultures upon experimental reduced hydration, a model that simulates the aberrant epidermal barrier state characteristic of several skin pathologies, including those that manifest in development of fibrosis. Consistent with this, we find that SFRP2 is overexpressed in both the dermis and epidermis of human hypertrophic scar tissue and lesional tissue of a mouse scleroderma model. Knockdown of SFRP2 expression in human fibroblasts antagonises proliferation and myofibroblast differentiation, including deposition of type I collagen, suggesting that SFRP2 signalling in fibroblasts may contribute to propagation of fibrosis in hypertrophic scar, as well as in other clinical indications characterised by skin fibrosis.

3.
Wound Repair Regen ; 2024 Jun 09.
Artigo em Inglês | MEDLINE | ID: mdl-38853489

RESUMO

Staphylococcus aureus is one of the most commonly detected bacteria in diabetic skin and soft tissue infections. The incidence and severity of skin and soft tissue infections are higher in patients with diabetes, indicating a potentiating mechanism of hyperglycaemia and infection. The goal of this review is to explore the metabolic and virulence factor adaptations of S. aureus under hyperglycaemic conditions. Primary data from identified studies were included and summarised in this paper. Understanding the nexus of hyperglycaemia, metabolism, and virulence factors provides insights into the complexity of diabetic skin and soft tissue infections attributed to S. aureus.

4.
J Surg Oncol ; 129(5): 953-964, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38247024

RESUMO

Our aim in this review was to ascertain rates of breast reconstruction among South Asian patients and identify attitudes towards breast cancer, survivorship, and breast reconstruction. Mastectomy rates for South Asian patients ranged from 52% to 77% and reconstruction following mastectomy varied from 0% to 14%. A negative perception of cancer, fears of social isolation, and taboos around breasts can prevent South Asian women from receiving surgical care after a breast cancer diagnosis.


Assuntos
Neoplasias da Mama , Mamoplastia , Feminino , Humanos , Neoplasias da Mama/cirurgia , Neoplasias da Mama/prevenção & controle , Mastectomia , Sobrevivência , Mama/cirurgia
5.
Ann Plast Surg ; 92(4): 463-468, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38527354

RESUMO

BACKGROUND: Breast cancer screening and surgical interventions are often underutilized in the Chinese community. For both Chinese American (CA) and native Chinese (NC) patients, screening rates are well below medical recommendations, which places these patients at risk for late diagnoses and larger tumors. There is also a notable reluctance to breast reconstruction after mastectomy. We investigated the role of sociodemographic and cultural barriers in breast treatment trends among Chinese breast cancer survivors. METHODS: A literature search for full-text articles published between 2011 and 2021 was performed using PubMed, The Web of Science, and Embase. The articles that were selected contained information regarding Chinese individuals in the United States or China who had undergone breast cancer screening or diagnosis of breast cancer and received treatment with or without reconstructive surgery. RESULTS: Both patient populations exhibited screening rates that were significantly lower than national recommendations. Of the CA patients, 25% reported never receiving a mammogram, whereas 450 million NCs have been left unscreened despite efforts made by the Chinese government. Misinformation, cultural beliefs, and fear significantly contributed to diminished breast health care among CA and NC women. Fear of recurrence, breast value, community influence, and limited health care resources were found to be the primary drivers of low breast reconstruction uptake. CONCLUSIONS: In both NC and CA women, there is a critical need for improved breast health information dissemination and overall quality of care. The findings summarized in this review can guide such efforts.


Assuntos
Neoplasias da Mama , Mamoplastia , Feminino , Humanos , Asiático , Neoplasias da Mama/cirurgia , Neoplasias da Mama/prevenção & controle , Comunicação , Mastectomia , Estados Unidos , China
6.
Int Wound J ; 21(9): e70029, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39245798

RESUMO

Diabetic foot complications that lead to lower extremity amputations pose a significant challenge to the entire global health system. In this multicentre clinical trial, 26 patients with chronic Wagner one diabetic foot ulcers (DFUs) were treated with a unique human keratin matrix graft applied either weekly or bi-weekly, in addition to standard of care. The hypothesis was that bi-weekly application would be similar to weekly application. The primary endpoint was complete wound closure by 12 weeks, and secondary endpoints included healing time, percent area reduction and weekly changes in peripheral neuropathy, pain and quality of life. In the intent-to-treat population, 77% (10/13) of DFUs treated with bi-weekly application healed compared with 69% (9/13) treated with weekly application. The mean time to heal within 12 weeks in the bi-weekly group was 61 days and in the weekly group was 54 days. The mean percent area reduction at 12 weeks was 94.7% in the bi-weekly group compared with 84.8% in the weekly group. The number of grafts used in the bi-weekly group was 3.9 compared with 6.2 in the weekly group. The results of this trial confirm our hypothesis that whether bi-weekly or weekly application of the unique keratin matrix graft is used to treat nonhealing indolent DFUs, there is a high rate of complete healing. Based on these results, future studies should be conducted that further investigate the use of this novel human keratin matrix graft for the treatment of chronic DFUs.


Assuntos
Pé Diabético , Queratinas , Cicatrização , Humanos , Pé Diabético/terapia , Pé Diabético/cirurgia , Masculino , Pessoa de Meia-Idade , Feminino , Idoso , Resultado do Tratamento , Queratinas/uso terapêutico , Adulto , Idoso de 80 Anos ou mais
7.
Int Wound J ; 21(4): e14882, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38606794

RESUMO

As the incidence of diabetic foot ulcers (DFU) increases, better treatments that improve healing should reduce complications of these ulcers including infections and amputations. We conducted a randomized controlled trial comparing outcomes between a novel purified reconstituted bilayer membrane (PRBM) to the standard of care (SOC) in the treatment of non-healing DFUs. This study included 105 patients who were randomized to either of two treatment groups (n = 54 PRBM; n = 51 SOC) in the intent to treat (ITT) group and 80 who completed the study per protocol (PP) (n = 47 PRBM; n = 33 SOC). The primary endpoint was the percentage of wounds closed after 12 weeks. Secondary outcomes included percent area reduction, time to healing, quality of life, and cost to closure. The DFUs that had been treated with PRBM healed at a higher rate than those treated with SOC (ITT: 83% vs. 45%, p = 0.00004, PP: 92% vs. 67%, p = 0.005). Wounds treated with PRBM also healed significantly faster than those treated with SOC with a mean of 42 versus 62 days for SOC (p = 0.00074) and achieved a mean wound area reduction within 12 weeks of 94% versus 51% for SOC (p = 0.0023). There were no adverse events or serious adverse events that were related to either the PRBM or the SOC. In comparison to the SOC, DFUs healed faster when treated with PRBM. Thus, the use of this PRBM is an effective option for the treatment of chronic DFUs.


Assuntos
Diabetes Mellitus , Pé Diabético , Humanos , Pé Diabético/cirurgia , Estudos Prospectivos , Qualidade de Vida , Padrão de Cuidado , Resultado do Tratamento , Cicatrização
8.
Int Wound J ; 21(9): e70046, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39278842

RESUMO

The transforming powder dressing (Altrazeal®, Uluru Inc, Addison, TX, USA) is simple to use, painless to apply and has a wear time of up to 30 days. This study aims to review the current literature to elucidate the impact of transforming powder dressing on healing, pain management and overall patient outcomes. We conducted a systematic review following Preferred Reporting Items of Systematic Reviews and Meta-Analyses guidelines. Data including study characteristics, patient demographics and wound outcomes were extracted. Our systematic review included 26 articles (n = 175). Of these articles, 13 (50%) were case reports, 10 (38.5%) were case series, 2 (7.7%) were randomised controlled trials and 1 (3.8%) was a cohort study. Wound types included venous ulcer (23.9%), pressure sore (19.7%), burn (15.5%), skin graft (13.4%), diabetic foot ulcer (4.2%), Mohs defect (3.5%) and other (19.6%). Complete re-epithelialization occurred in 90.1% of the wounds. A total of 19 studies (73%) discussed pain, each of which reported reduced pain with the use of transforming powder dressing. The evaluated studies collectively suggest that transforming powder dressing offers a promising re-epithelialization rate and analgesic effect across various wound types.


Assuntos
Bandagens , Cicatrização , Humanos , Pós , Úlcera por Pressão/terapia , Ferimentos e Lesões/terapia
9.
Wound Repair Regen ; 31(6): 731-737, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37768279

RESUMO

Across scar studies, there is a lack of dark-skinned individuals, who have a predisposition for keloid formation, altered pigmentation and poorer quality of life (QOL). There is a need for patients of colour to be included in scar scale development and validation. In this study, we evaluate the racial diversity of patients included in the validation of scar assessment scales. A systematic review was conducted for articles reporting on the validation of a scar assessment tool. Racial, ethnic and Fitzpatrick skin type (FST) data were extracted. Fifteen scar scale validation studies were included. Nine of the studies did not mention FST, race or ethnicity of the patients. Two of the studies that reported FST or race information only included White patients or included no FST V/VI patients: mapping assessment of scars (MAPS) and University of North Carolina '4P'. Only four studies included non-White patients or dark-skinned patients in the validation of their scar scale: the modified Vancouver Scar Scale (VSS), modified Patient and Observer Scar Assessment Scale (POSAS), acne QOL and SCAR-Q scales. The patients included in the modified VSS validation were 7% and 13% FST V/VI, 14% African in the modified POSAS and 4.5% FST V/VI in the SCAR-Q. We highlight the severe lack of diversity in scar scale validation, with only 4 out of 15 studies including dark-skinned patients. Given the susceptibility of darker-skinned individuals to have poorer scarring outcomes, it is critical to include patients of colour in the very assessment tools that determine their scar prognosis. Inclusion of patients of colour in scar scale development will improve scar assessment and clinical decision-making.


Assuntos
Cicatriz , Qualidade de Vida , Humanos , Cicatriz/patologia , Pigmentação da Pele , Cicatrização , Pele/patologia
10.
Clin Exp Pharmacol Physiol ; 50(3): 238-246, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36414819

RESUMO

Chronic or delayed healing wounds constitute an ever-increasing burden on healthcare providers and patients alike. Thus, therapeutic modalities that are tailored to particular deficiencies in the delayed wound healing response are of critical importance to improve clinical outcomes. Human amnion-derived viable and devitalized allografts have demonstrated clinical efficacy in promoting the closure of delayed healing wounds, but the mechanisms responsible for this efficacy and the specific wound healing processes modulated by these tissues are not fully understood. Here, we utilized a diabetic murine excisional wound model in which healing is driven by granulation and re-epithelialization, and we applied viable (vHAMA) or devitalized (dHAMA) amnion-derived allografts to the wound bed in order to determine their effects on wound healing processes. Compared to control wounds that were allowed to heal in the absence of treatment, wounds to which vHAMA or dHAMA were applied demonstrated enhanced deposition of granulation tissue accompanied by increased cellular proliferation and increased de novo angiogenesis, while vHAMA-treated wounds also demonstrated accelerated re-epithelialization. Taken together, these data suggest that both vHAMA and dHAMA facilitate wound healing through promoting processes critical to granulation tissue formation. Further understanding of the cellular and tissue mechanisms underlying the effects of tissue-derived matrices on wound healing will enable tailored prescription of their use in order to maximize clinical benefit.


Assuntos
Âmnio , Cicatrização , Humanos , Camundongos , Animais , Tecido de Granulação , Proliferação de Células
11.
Int Wound J ; 20(3): 853-860, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36054243

RESUMO

The incidence and economic burden of diabetic foot ulcers continues to rise throughout the world. In this prospective study, a unique device designed to offload the wound, enhance circulation and monitor patient compliance was evaluated for safety and efficacy. The device provides offloading and intermittent plantar compression to improve the pedal flow of oxygenated blood and support wound healing while recording patient use. Ten patients with non-healing diabetic foot ulcers UTgrade 1A/Wagner grade 1 were treated weekly for up to 12 weeks. The primary endpoint was complete wound closure at 12 weeks, and secondary endpoints included healing time, percent area reduction and changes in pain using the visual analogue pain scale. Eight out of ten wounds healed within 12 weeks(80%), and the mean healing time was 41 days(95% CI:24.3-58.3). The percent area reduction was 75(SD:53.9). The baseline visual analogue pain scale was 4.5(2.9) as compared with 3.3(3.4) at end of study. No device-related or serious adverse events were reported. This unique intermediate plantar compression and offloading device may be considered as an alternative for safe and effective for treatment of non-healing diabetic foot ulcers. During treatment, wound healing was significantly accelerated, and pain was improved. Larger randomised controlled trials are underway to validate these early findings.


Assuntos
Diabetes Mellitus , Pé Diabético , Humanos , Pé Diabético/complicações , Estudos Prospectivos , Estudos de Viabilidade , , Dor/complicações
12.
Int Wound J ; 20(10): 4083-4096, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37402533

RESUMO

A novel autologous heterogeneous skin construct (AHSC) was previously shown to be effective versus standard of care (SOC) treatment in facilitating complete wound healing of Wagner 1 diabetic foot ulcers in an interim analysis of 50 patients previously published. We now report the final analysis of 100 patients (50 per group), which further supports the interim analysis findings. Forty-five subjects in the AHSC treatment group received only one application of the autologous heterogeneous skin construct, and five received two applications. For the primary endpoint at 12 weeks, there were significantly more diabetic wounds closed in the AHSC treatment group (35/50, 70%) than in the SOC control group (17/50, 34%) (p = 0.00032). A significant difference in percentage area reduction between groups was also demonstrated over 8 weeks (p = 0.009). Forty-nine subjects experienced 148 adverse events: 66 occurred in 21 subjects (42%) in the AHSC treatment group versus 82 in 28 SOC control group subjects (56.0%). Eight subjects were withdrawn due to serious adverse events. Autologous heterogeneous skin construct was shown to be an effective adjunctive therapy for healing Wagner 1 diabetic foot ulcers.


Assuntos
Diabetes Mellitus , Pé Diabético , Pele Artificial , Humanos , Pé Diabético/terapia , Cicatrização , Pele , Resultado do Tratamento
13.
Wound Repair Regen ; 30(5): 541-545, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35918300

RESUMO

Infection is a major source of complications in delayed diabetic wound healing. Increased understanding of differential bacterial responses to diabetic wounds will enable us to better understand chronic wound pathogenesis. Here we create delayed-healing wounds infected with Staphylococcus aureus in non-diabetic and diabetic mice and used RNA-seq to compare bacterial gene expression profiles 3 or 7 days after infection. Analysis at day 3 demonstrated substantial transcriptomic differences between bacteria colonising non-diabetic and diabetic wound beds. Most of these transcriptional differences resolved by day 7, suggesting normalisation of many bacterial phenotypes later in the diabetic wound healing process. Lingering differentially expressed genes at day 7 were enriched for genes related to carbohydrate metabolism, which includes genes of the lac operon, and capsular polysaccharide synthesis, which includes the cap8 locus. These data encourage further research into host-pathogen interactions in wound healing and how they influence differential outcomes in the diabetic wound environment.


Assuntos
Diabetes Mellitus Experimental , Infecções Estafilocócicas , Infecção dos Ferimentos , Animais , Bactérias , Camundongos , Staphylococcus aureus , Transcriptoma , Cicatrização/genética , Infecção dos Ferimentos/genética , Infecção dos Ferimentos/microbiologia
14.
Wound Repair Regen ; 30(4): 526-535, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35641440

RESUMO

The fluid immersion simulation system (FIS) has demonstrated good clinical applicability. This is the first study to compare surgical flap closure outcomes of FIS with an air-fluidised bed (AFB), considered as standard of care. The success of closure after 14 days post-op was the primary endpoint. Secondary endpoints were incidences of complications in the first 2 weeks after surgery and the rate of acceptability of the device. Thirty-eight subjects were in the FIS group while 42 subjects were placed in the AFB group. Flap failure rate was similar between groups (14% vs. 12%; p = 0.84). Complications, notably dehiscence and maceration, were significantly higher in the FIS group (40% vs. 17%; p = 0.0296). The addition of a microclimate regulation device (ClimateCare®) to FIS for the last 43 patients showed a significant decrease in the rate of flap failure (71% vs. 16%; p = 0.001) and incidence of complications (33% vs. 0%; p = 0.011). There was no statistically significant difference between the FIS and air-fluidised bed (AFB) in the rate of acceptability (nurse acceptance: 1.49 vs. 1.72; p = 0.8; patient acceptance: 2.08 vs. 2.06; p = 0.17), which further illustrates the potential implementation of this tool in a patient-care setting. Our results show that the use of ClimateCare® in combination with FIS can be a better alternative to the AFB in surgical closure of pressure ulcers.


Assuntos
Úlcera por Pressão , Humanos , Imersão , Complicações Pós-Operatórias , Úlcera por Pressão/epidemiologia , Úlcera por Pressão/cirurgia , Estudos Prospectivos , Retalhos Cirúrgicos , Cicatrização/fisiologia
15.
Exp Cell Res ; 400(2): 112512, 2021 03 15.
Artigo em Inglês | MEDLINE | ID: mdl-33545130

RESUMO

Since chronic, non-healing wounds represent an increasing source of economic and temporal burden for patients who suffer from them and healthcare professionals that treat them, therapeutic modalities that promote closure of delayed and non-healing wounds are of utmost importance. Recent clinical results of allografts derived from amnion and chorion placental layers encourage further investigation of the mechanisms underlying clinical efficacy of these products for treatment of wounds. Here, we utilized a diabetic murine splinted excisional wound model to investigate the effects of a dehydrated human amnion/chorion-derived allograft (dHACA) on delayed wound healing, as well as the effects of dehydrated allograft derived solely from amnion tissue of the same donor. We examined wound healing by histological endpoint analysis, and we assessed other parameters relevant to functional wound healing in the wound bed including angiogenesis, macrophage phenotypes, proliferative activity, and gene expression. Herein we demonstrate that application of dHACA to a murine diabetic model of delayed wound progression results in better macroscale wound resolution outcomes, including rate of closure, compared to unaided wound progression, while dehydrated human amnion allograft (dHAA) fails to improve outcomes. Improved gross wound resolution observed with dHACA was accompanied by increased granulation tissue formation, proliferation and vascular ingrowth observed in the wound bed, early macrophage polarization towards anti-inflammatory phenotypes, and downregulation of pro-fibrotic gene expression. Overall, our data suggest that improvements in the rates of delayed wound closure observed from combined amnion/chorion allografts are associated with modulation of critical cellular and tissue processes commonly found to be dysregulated in delayed healing wounds, including proliferation, vascularization, inflammation, and re-epithelialization.


Assuntos
Âmnio/transplante , Córion/transplante , Cicatrização , Ferimentos e Lesões/terapia , Aloenxertos , Âmnio/citologia , Animais , Córion/citologia , Desidratação , Feminino , Humanos , Camundongos , Gravidez , Transplante de Células-Tronco
16.
Int J Gynecol Cancer ; 2022 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-35948366

RESUMO

OBJECTIVE: Obturator nerve injury can occur as a complication of gynecologic surgeries, occurring most frequently in patients with endometriosis and genitourinary malignancies. The resulting injury causes paresthesia and major weakness in adduction and atrophy of the adductor group of lower extremity muscles. The objective of this study was to conduct a systematic review and meta-analysis of the effectiveness of end-to-end repair, nerve grafting, and nerve transfer in improving motor function in patients with obturator nerve injury. METHODS: PubMed, Cochrane, Medline, and Embase libraries were searched from May 1994 to August 2020 according to the PRISMA guidelines for articles that present functional outcomes after obturator nerve injury in patients treated with nerve grafting, end-to-end repair, or nerve transfer. RESULTS: A total of 25 patients from 22 studies were included in the study, 15 of whom were treated with end-to-end repair (60%), nine with nerve grafting (36%), and one with nerve transfer (4%). Of the 15 patients with transection data, two had incomplete (13%) and 13 had complete (87%) nerve transections. The patients underwent pelvic lymphadenectomy (n=24) and radical cystectomy (n=1) operations. The mean Medical Research Council (MRC) score was 2.95±1.7 immediately after treatment and 4.77±0.6 at the final follow-up. All patients achieved good outcomes (MRC ≥3) at the final follow-up. The mean MRC score for end-to-end repair (n=15), nerve grafting (n=9), and nerve transfer (n=1) was 4.8±0.6, 4.7±0.8, and 5, respectively. Patients with end-to-end repair had higher immediate post-operative strength than those treated with nerve grafting (p=0.03) and tended to achieve full functional recovery after shorter periods of time (rho=-0.65, p=0.049). Other parameters did not correlate with MRC. CONCLUSION: End-to-end repair, nerve grafting, and nerve transfer are equally effective in restoring function in patients with obturator nerve injury. However, patients treated with end-to-end repair had higher immediate post-operative strength than those treated with nerve grafting.

17.
Cell Mol Life Sci ; 78(3): 935-947, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32409862

RESUMO

Chronic wounds have been considered as major medical problems that may result in expensive healthcare. One of the common causes of chronic wounds is bacterial contamination that leads to persistent inflammation and unbalanced host cell immune responses. Among the bacterial strains that have been identified from chronic wounds, Staphylococcus aureus is the most common strain. We previously observed that S. aureus impaired mouse cutaneous wound healing by delaying re-epithelialization. Here, we investigated the mechanism of delayed re-epithelialization caused by S. aureus infection. With the presence of S. aureus exudate, the migration of in vitro cultured human keratinocytes was significantly inhibited and connexin-43 (Cx43) was upregulated. Inhibition of keratinocyte migration by S. aureus exudate disappeared in keratinocytes where the expression of Cx43 knocked down. Protein kinase phosphorylation array showed that phosphorylation of Akt-S473 was upregulated by S. aureus exudate. In vivo study of Cx43 in S. aureus-infected murine splinted cutaneous wound model showed upregulation of Cx43 in the migrating epithelial edge by S. aureus infection. Treatment with a PI3K/Akt inhibitor reduced Cx43 expression and overcame the wound closure impairment by S. aureus infection in the mouse model. This may contribute to the development of treatment to bacterium-infected wounds.


Assuntos
Conexina 43/metabolismo , Dermatopatias Bacterianas/patologia , Staphylococcus aureus/patogenicidade , Cicatrização/fisiologia , Animais , Linhagem Celular , Movimento Celular/efeitos dos fármacos , Conexina 43/antagonistas & inibidores , Conexina 43/genética , Modelos Animais de Doenças , Humanos , Queratinócitos/citologia , Queratinócitos/metabolismo , Camundongos , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Fosfatidilinositol 3-Quinases/química , Fosfatidilinositol 3-Quinases/metabolismo , Inibidores de Fosfoinositídeo-3 Quinase/farmacologia , Fosforilação , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Proteínas Proto-Oncogênicas c-akt/metabolismo , Interferência de RNA , RNA Interferente Pequeno/metabolismo , Dermatopatias Bacterianas/metabolismo , Dermatopatias Bacterianas/microbiologia , Staphylococcus aureus/isolamento & purificação , Regulação para Cima
18.
Cell Mol Life Sci ; 78(14): 5469-5488, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34100980

RESUMO

Within an articulately characterized family of ion channels, the voltage-gated sodium channels, exists a black sheep, SCN7A (Nax). Nax, in contrast to members of its molecular family, has lost its voltage-gated character and instead rapidly evolved a new function as a concentration-dependent sensor of extracellular sodium ions and subsequent signal transducer. As it deviates fundamentally in function from the rest of its family, and since the bulk of the impressive body of literature elucidating the pathology and biochemistry of voltage-gated sodium channels has been performed in nervous tissue, reports of Nax expression and function have been sparse. Here, we investigate available reports surrounding expression and potential roles for Nax activity outside of nervous tissue. With these studies as justification, we propose that Nax likely acts as an early sensor that detects loss of tissue homeostasis through the pathological accumulation of extracellular sodium and/or through endothelin signaling. Sensation of homeostatic aberration via Nax then proceeds to induce pathological tissue phenotypes via promotion of pro-inflammatory and pro-fibrotic responses, induced through direct regulation of gene expression or through the generation of secondary signaling molecules, such as lactate, that can operate in an autocrine or paracrine fashion. We hope that our synthesis of much of the literature investigating this understudied protein will inspire more research into Nax not simply as a biochemical oddity, but also as a potential pathophysiological regulator and therapeutic target.


Assuntos
Fibrose/fisiopatologia , Homeostase , Inflamação/fisiopatologia , Sódio/metabolismo , Canais de Sódio Disparados por Voltagem/metabolismo , Animais , Humanos , Transdução de Sinais , Canais de Sódio Disparados por Voltagem/genética
19.
J Wound Care ; 31(Sup5): S6-S12, 2022 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-35576198

RESUMO

OBJECTIVE: Pressure ulcers (PUs) are hard-to-heal, open wounds that affect millions of adults worldwide. Patients experience physical, mental, social and financial impairment. On average, <50% of stage 3 and 4 PUs heal by the sixth month. Treatment of PUs is highly variable due to a patient's comorbidities, demographics and wound characteristics. Because of this, there exists no standard dressing for PUs. Altrazeal transforming powder dressing (TPD, Uluru Inc., US) offers a promising new form of wound treatment; however, little evidence exists for TPD in the treatment of hard-to-heal PUs. This case series sought to examine the effect of TPD in hard-to-heal PUs that have previously undergone unsuccessful standard of care (SoC) wound therapy. METHODS: This case series used retrospective data from patients with stage 2-4 PUs that failed to heal after SoC therapies. Factors examined were: number of dressing changes; time between dressing changes; time to wound closure; and pain level. While data were assessed for all patients, we focused on the six particular cases that most clearly illustrated the effect of TPD on wound healing. RESULTS: Each of the 21 patients treated with TPD experienced successful and expedited wound closure. Stage 4 PUs took an average of 87 days with approximately six dressing changes to closure. Stage 3 PUs took an average of 41 days with approximately four dressing changes, and stage 2 PUs an average of 13 days to closure with approximately one dressing change. In the cases presented herein for which pain scores were reported, each showed a reduction in pain from an 8 or 9/10 to a 1 or 2/10 with the first dressing change. CONCLUSION: In this case series, TPD effectively reduced pain and healed PUs that had previously failed SoC interventions. We suggest future prospective studies in order to more effectively measure the wound healing capability and healthcare utilisation of TPD for treatment of PUs.


Assuntos
Úlcera por Pressão , Adulto , Bandagens , Humanos , Dor , Pós , Úlcera por Pressão/terapia , Estudos Prospectivos , Estudos Retrospectivos , Supuração
20.
Aesthet Surg J ; 42(8): 956-963, 2022 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-35439819

RESUMO

BACKGROUND: Aggregated data show that Black patients undergo disproportionately lower rates of cosmetic surgery than their Caucasian counterparts. Similarly, laboratory findings indicate that social media representation is lower among Black patients for breast reconstruction surgery, and it is expected that this could be the case in cosmetic surgery as well. OBJECTIVES: The aim of this study was to explore the social media representation of Black patients and physicians in the 5 most common cosmetic surgery procedures: rhinoplasty, blepharoplasty, abdominoplasty, breast augmentation, and liposuction. METHODS: Data were collected from RealSelf (Seattle, WA), the most popular social media site for sharing cosmetic surgery outcomes. The skin tone of 1000 images of patients in each of the top 5 cosmetic surgeries was assessed according to the Fitzpatrick scale, a commonly utilized skin tone range. Additionally, the Fitzpatrick scores of 72 providers who posted photographs within each surgical category were collected. RESULTS: Black patients and providers are underrepresented in rhinoplasty, blepharoplasty, breast augmentation, and liposuction compared with the general population (defined by the US Census Bureau), but were proportionately represented in abdominoplasty. Additionally, it was found that patients most often matched Fitzpatrick scores when both had scores of 2, whereas patients with a score of 5 and 6 rarely matched their provider's score. CONCLUSIONS: The underrepresentation of Black patients and providers in social media for cosmetic surgery may well discourage Black patients from pursuing cosmetic surgeries. Therefore, it is essential to properly represent patients to encourage patients interested in considering cosmetic surgery.


Assuntos
Abdominoplastia , Lipectomia , Médicos , Mídias Sociais , Cirurgia Plástica , Humanos
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