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1.
Life (Basel) ; 13(9)2023 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-37763299

RESUMO

Hidradenitis suppurativa (HS), also known as acne inversa, is a chronic inflammatory disease that manifests as painful nodules, abscesses, draining dermal tunnels, and scarring in intertriginous areas such as the axillae, groin, and breasts. The nature of the disease and its chronicity have a destructive impact on mental health and quality of life. HS has an estimated global prevalence of 0.00033-4.1% and it disproportionately affects females compared to males. HS involving the female anogenital regions is reported rarely in the gynecological literature, and it can often be mistaken for other vulvar diseases. The distinct phenotypes and HS rarity cause delayed diagnosis and the implementation of effective treatment. Acne inversa is associated with several comorbidities, including metabolic disease, diabetes mellitus, inflammatory bowel diseases, and spondyloarthropathies. Although HS etiology and pathogenesis remain unclear, studies have shown that lifestyle, immunological processes, genetics, and hormonal predispositions may promote follicular hyperkeratosis, dilatation, and rupture, leading to the development of chronic tissue inflammation. This article provides updated information on HS pathogenesis, comorbidities, and treatment methods. Furthermore, we share our experience in the surgical treatment of the disease, which often proves most effective, and highlight that an interdisciplinary management approach ensures optimal outcomes.

2.
Postepy Dermatol Alergol ; 40(2): 283-290, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37312920

RESUMO

Introduction: Chronic pain frequently accompanies the daily lives of many chronic wound patients. The degree of pain experienced significantly increases when performing medical procedures related to wound management. The use of eye-tracked games in order to distract the patient's attention from the painful activities performed can be an effective procedure. Aim: Assesment of eye-trackers as a distractors during wound management. Material and methods: Forty patients suffering from chronic wounds were qualified for the study. Patients performed eye tracking games during dressing changes and wound cleaning. Pain sensations were surveyed. The survey concerned the pain experienced on a daily basis, when changing the dressing without use and with the use of eye trackers. Results: It was found that eye trackers significantly reduced the pain experienced during dressing changes compared to the pain caused by these procedures, but without the use of eye trackers. Conclusions: On the basis of the obtained results, it was proposed to introduce eye trackers into routine clinical practice during chronic wound management.

3.
Healthcare (Basel) ; 11(10)2023 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-37239740

RESUMO

(1) Background: Hidradenitis suppurativa is a chronic, inflammatory skin disease. It is characterized by the transformation of normal skin into skin with abscesses, nodules, tunnels, and scars. The most commonly affected areas are the armpits, groins, buttocks, and subscapular area. Patients with HS require constant care under the supervision of the outpatient clinic. Due to the COVID-19 pandemic, consultations have been introduced in the form of telemedicine. The aim of this study was to evaluate the availability of HS treatment during the COVID-19 pandemic and to assess patient satisfaction, problems with access to medical care, and the impact of the pandemic on the course of the disease. (2) Methods: An internet survey with an anonymous questionnaire was used to assess the effectiveness of telemedicine consultations. The survey consisted of 25 closed questions, and responses were kept fully anonymous. (3) Results: Most respondents reported minor problems with accessing specialized HS medical care during the COVID-19 pandemic (n = 25, 35.71%). However, 35.71% (n = 25) of them reported major problems with appointments for specialized ambulatory treatment during the last few months of the pandemic, mainly due to delayed appointments. Almost half of the respondents had been diagnosed with COVID-19 (n = 34, 48.57%), and 58.57% (n = 41) of respondents did not see a correlation between COVID-19 infection and HS progression. (4) Conclusions: Our study showed that the pandemic significantly limited access to medical advice, and patients with hidradenitis suppurativa prefer standard consultations.

4.
Artigo em Inglês | MEDLINE | ID: mdl-36360752

RESUMO

Tissue-engineered human allogeneic skin grafts retrieved from a deceased donor play an important role in the therapy of extensive and deeply burned patients. However, there is a vital deficit of allogeneic skin donors, and the reserves of human allogeneic skin grafts are not sufficient. The goal of this work was to analyze the level of knowledge and attitudes of Polish society in the field of transplantation, with particular emphasis on allogeneic skin transplantation. The study used a self-made questionnaire comprised of 23 questions. 1000 respondents took part in this research. The respondents were a diverse group in terms of age, sex, education, and place of residence. The obtained results show a general positive attitude of the respondents towards the idea of transplantology. However, people with lower education presented a more negative attitude towards the donation of tissues and organs. Additionally younger people were not able to clearly declare readiness for organ procurement. What is more data analysis revealed certain gaps in more detailed knowledge and surprising attitudes. In that respect, the lack of awareness about the criteria for determining brain death could be mentioned. There was also a lack of acceptance for skin procurement in specific population groups. It can therefore be concluded that a key role in the success of the idea of transplantation in Poland is the broad and systematic education of the society.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Obtenção de Tecidos e Órgãos , Humanos , Polônia , Conhecimentos, Atitudes e Prática em Saúde , Doadores de Tecidos , Inquéritos e Questionários
5.
Biomedicines ; 10(11)2022 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-36359387

RESUMO

Reconstructive surgery often confronts large tissue defects. This creates a need to look for materials that are immunogenic but offer the possibility of tissue filling. ADM-acellular dermal matrix-is a biological collagen matrix without immunogenicity, which is more commonly used in surgical treatment. Reconstructive surgery is still searching for various biocompatible materials that can be widely used in surgery. The available materials have their advantages and disadvantages. This paper is a literature review on the use of human acellular dermal matrix (ADM) in reconstructive surgery (surgical oncology, plastic and reconstructive surgery, and gynecologic reconstructive surgery). ADM appears to be a material of increasing use in various fields of surgery, and thus, further research in this area is required.

6.
Bioengineering (Basel) ; 9(8)2022 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-36004913

RESUMO

Hidradenitis suppurativa is a chronic disease that significantly reduces patients' quality of life. Patients are chronically treated with systemic therapies, which are often ineffective. Surgical treatment for severe cases of hidradenitis suppurativa is one option for affected patients. Surgical treatment has its limitations, and wound closure may be particularly problematic. This requires the use of reconstructive techniques. The methods of choice for wound closure are split-thickness skin grafts or local flaps reconstructions. However, each method has its limitations. This is a presentation of a new reconstructive surgical method in hidradenitis suppurativa surgery: the use of a co-graft of Acellular dermal matrix and split thickness skin graft as a novel method in wound closure after wide excisions, based on two cases. The results of this method are very promising: we achieved very fast wound closure with good aesthetic results regarding scar formation. In this paper, we used several examinations: laser speckle analysis, cutometer tests, and health-related quality of life (QoL) questionnaire to check the clinical impact of this method. Our initial results are very encouraging. ADM with STSG as a co-graft could be widely used in reconstructive surgery. This is a preliminary study, which should be continued in further, extended research.

7.
J Clin Med ; 11(14)2022 Jul 12.
Artigo em Inglês | MEDLINE | ID: mdl-35887793

RESUMO

The aim of our study is to draw attention to the multitude of applications of acellular dermal matrix (ADM) in the surgical treatment of urogynaecological disorders, such as reduction in the reproductive organs, and in reconstructive gynaecology. Despite the existence of numerous operational methods and materials, the effectiveness of transvaginal operation is still insufficient. Native tissue operations are often not durable enough, while operations with synthetic materials have numerous side effects, such as infections, hematomas, vaginal erosion, or dyspareunia. Hence, the search continues for a different material with a better efficacy and safety profile than those previously mentioned. It seems that ADM can meet these requirements and be a useful material for urogynaecological surgery. Key words related to the usage of ADM in gynaecological reconstructive surgery were used to search relevant databases (NCBI MedLine, Clinical Key, Clinicaltrials.gov). This manuscript is based on 43 literature sources, 28 (65.11%) of which were released after 2016. Older sources are cited for the purpose of presenting basic science, or other important issues related to the manuscript. ADM seems to be an ideal material for urogynaecological and reconstructive surgery. It has high durability, and thus high effectiveness. Moreover, it does not have the side effects typical for synthetic materials. There are no reports of material rejection, erosion or dyspareunia directly related to the presence of the mesh. Due to the difficulties in obtaining ADM and the need to perform additional tests, this material is not common in routine clinical practice. Therefore, the number of cases and the size of the research groups are insufficient to clearly define the potential of mesh from biological tissue. However, the results are so promising that it is worth considering a wider introduction to the use of this material. Our hope is that increasing clinicians' awareness of this topic will lead to more studies comparing methods using native tissues or synthetic materials and those using ADM.

8.
J Clin Med ; 11(15)2022 Jul 26.
Artigo em Inglês | MEDLINE | ID: mdl-35893421

RESUMO

(1) Background: Hidradenitis suppurativa is a disease that affects the intimacy of patients. This disease reduces the quality of life and functioning of patients in everyday life. The surgical treatment of HS is one of the treatments for HS that can improve the quality of life. (2) Methods: The main goal of this study was to assess quality of life before the surgical treatment and after the surgical treatment of HS at Center for Burn Treatment in Siemianowice Slaskie, Poland, using the EQ-5D-5L survey before the operation and at follow-up (6 months after). (3) Results: The average quality of life measured with the EQ-5D-5L survey before therapy was 39.3 ± 20.1 (min., 0; max., 60; most frequent value, 50), whereas after surgical treatment, the mean quality of life was 89.5 ± 12.5 (min., 50; max., 100; most frequent value, 100). The average increase in the quality of life was 50.2 ± 19.5 (min., 30; max., 100; most frequent value, 30), and it was statistically significant (p < 0.001).

9.
Cell Tissue Bank ; 23(4): 863-885, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35355193

RESUMO

A burn is a sudden injury which immediate or long-term consequences may be life-threatening for the patient. A mass disaster event may involve large numbers of severely burned patients. Patients of this type typically have a limited area of healthy, unburned skin from which an autologous split thickness skin graft could be collected. In a clinical situation of this type, it is necessary to use a particular skin substitute. Non-viable allogeneic human skin graft materials might be considered as the most suitable skin substitutes in the treatment of such patients. At present, Poland does not have a sufficient supply of human allogeneic skin graft materials to meet the needs arising from a sudden and unforeseen mass disaster. This study involved an analysis of selected mass disasters. From this an estimate was made from a verified casualty profile of the necessary minimum stock of human allogeneic skin graft materials. An insufficient amount of skin results from an inadequate number of skin donors, which in turn results from the current tissue donation system. Therefore, a proposal has been made for the organizational, legal and systemic changes required to improve the situation in Polish transplantology, with particular emphasis on skin donation. In order to achieve a strategic stock of human skin grafts, a tissue collecting transplantation team should be organized. The rights and obligations of the non-physician transplant team member should be extended. Proposals have been made for awareness campaigns (adverts, posters etc.) and educational schemes (educational video, lectures during transplant coordinator training, etc.). Finally, a proposal has been made for possible methods to deal with the logistic management of the allogeneic skin stock. The required, essential stock of human allogeneic skin in the event of a mass disaster has been estimated at 600,000 cm2.


Assuntos
Queimaduras , Desastres , Transplante de Células-Tronco Hematopoéticas , Humanos , Transplante de Pele/métodos , Polônia , Queimaduras/terapia
10.
J Biomed Mater Res B Appl Biomater ; 110(3): 547-563, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34478207

RESUMO

The nonviable allogeneic human skin grafts might be considered as the most suitable skin substitutes in the treatment of extensive and deep burns. However, in accordance to biological security such grafts require the final sterilization prior to clinical application. The aim of the study was to verify the influence of electron beam irradiation of three selected doses: 18, 25, and 35 kGy on the extracellular matrix of human skin. Prior to sterilization, the microbiological tests were conducted and revealed contamination in all examined cases. Individual groups were subjected to single electron beam radiation sterilization at proposed doses and then subjected to microbiological tests again. The results of microbiological testing performed for all irradiation doses used were negative. Only in the control group was a growth of microorganisms observed. The FTIR spectrometry tests were conducted followed by the histological evaluation and mechanical tests. In addition, cost analysis of radiation sterilization of individual doses was performed. The results of spectroscopic analysis, mechanical tests, and histological staining showed no significant changes in composition and characteristics of tested tissues after their irradiation, in comparison to control samples. The cost analysis has shown that irradiation with 18 kGy is the most cost-effective and 35 kGy is the least favorable. However, according to biological risk reduction, the recommended sterilization dose is 35 kGy, despite the higher price compared to the other doses tested.


Assuntos
Elétrons , Transplante de Células-Tronco Hematopoéticas , Matriz Extracelular , Raios gama , Humanos , Transplante de Pele , Esterilização/métodos
11.
Postepy Dermatol Alergol ; 39(6): 1015-1020, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36686007

RESUMO

Hidradenitis suppurativa (HS) is a chronic disease, which causes painful discomfort. The main regions involved in this disease are axillary, inguinal and perianal. The etiology is unknown at present. It is suggested that genetics, smoking and diabetes are involved in HS. General treatment consists of antibiotics and anti-inflammatory biological drugs. HS is a multidisciplinary disease, which involves surgical treatment as well. We would like to present surgical treatment in HS. Deroofing and drainage/incisions are the most frequent techniques in general surgery departments. The article describes additional techniques such as skin grafts and flaps. We conclude that local flaps are the best choice in surgical treatment.

12.
Postepy Dermatol Alergol ; 39(6): 1101-1105, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36686013

RESUMO

Introduction: Hidradenitis suppurativa (HS) is an inflammatory chronic disease of the hair follicles that presents with different lesions in the apocrine gland-bearing areas of the human body. There are many possible factors for HS. Acne inversa is not primarily considered to be an infectious disease. A variety of Gram-positive and Gram-negative bacteria have been found from the lesions sporadically. Aim: To assess the bacteriological profile of HS before surgical treatment. Material and methods: We collected specimens for aerobic microbiological testing from 18 patients before surgical treatment in our hospital. The specimens were obtained from abscesses, directly from skin fistulas, on day 1 of hospitalisation. Results: The most common bacteria in HS lesions were Staphylococcus aureus and Proteus mirabilis. In 4 patients we found multi-drug-resistant bacteria (MLSB, MRSA and A. baumannii). Conclusions: Long-term antibiotic treatment can cause multi-drug resistance in strains collected in HS lesions.

13.
J Clin Med ; 12(1)2022 Dec 30.
Artigo em Inglês | MEDLINE | ID: mdl-36615108

RESUMO

Negative consequences and medical complications of COVID-19 can persist for up to several months after initial recovery. These consequences can include stroke, diabetes, decreased lung diffusing capacity, sleep apnea, pulmonary fibrosis, arrhythmia, myocarditis, fatigue, headaches, muscle aches, heart rate fluctuations, sleep problems, memory problems, nervousness, anxiety, and other neurological disorders. Thirty-one patients who reported symptoms related to previous COVID-19 disease of both sexes were enrolled in the initial program. The patients underwent compression sessions in a multiplace hyperbaric chamber. Each patient underwent a cycle of 15 compressions. Before the first session, each participant completed a venous blood gas test, a Fullerton test, and two spirometry tests (one before the Fullerton test and one after the test). Patients completed psychotechnical tests, a questionnaire on quality of life (Polish version of EQ-5D-5L), and a questionnaire on specific symptoms accompanying the disease and post-infection symptoms. The results showed significant improvements in areas such as quality of life, endurance and strength, some spirometric parameters, the anion gap and lactate levels, working memory, and attention in the group of treated patients. In contrast, there were no changes in pH, pO2, pCO2, glucose, and excess alkaline values. A follow-up interview confirmed that the beneficial effects were maintained over time. Considering the results obtained, including the apparent improvement in the patient's clinical condition, it can be concluded that the use of 15 compression sessions was temporarily associated with a noticeable improvement in health and performance parameters as well as improvement in certain blood gas parameters.

14.
Adv Exp Med Biol ; 1345: 193-208, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34582024

RESUMO

Thermal injuries may cause significant damage to large areas of the skin. Extensive and deep burn wounds require specialized therapy. The optimal method in the strategy of treating extensive, full thickness burns (III°) is the use of autologous split thickness skin grafts STSG (Busuioc et al. Rom J Morphol Embryol 4:1061-1067, 2012; Kitala D, Kawecki M, Klama-Baryla A, Labus W, Kraut M, Glik J, Ryszkiel I, Kawecki MP, Nowak M. Allogeneic vs. Autologous Skin Grafts in the Therapy of Patients with Burn Injuries: A Restrospective, Open-label Clinical Study with Pair Matching. Adv Clin Exp Med. 2016 Sep-Oct;25(5):923-929.; Glik J, Kawecki M, Kitala D, Klama-Baryla A, Labus W, Grabowski M, Durdzinska A, Nowak M, Misiuga M, Kasperczyk A. A new option for definitive burn wound closure - pair matching type of retrospective case-control study of hand burns in the hospitalized patients group in the Dr Stanislaw Sakiel Center for Burn Treatment between 2009 and 2015. Int Wound J. 2017 Feb 21. https://doi.org/10.1111/iwj.12720 . [Epub ahead of print]; Prim et al. May 24Wound Repair Regen., 2017; Grossova et al. Mar 31Ann Burns Fire Disasters 30:5-8, 2017). The main limitation of that method is the inadequate amount of healthy, undamaged skin (donor sites), which could be harvested and used as a graft. Moreover, donor sites are an additional wounds that require analgesic therapy, leave scars during the healing process and they are highly susceptible to infection (1-6). It must be emphasized that in terms of the treatment of severe, deep and extensive burns, and there should be no doubt that the search for a biocompatible skin substitute that would be able to replace autologous STSG is an absolute priority. The above-mentioned necessitates the search for new treatment methods of severe burn wounds. Such methods could consider the preparation and application of bioengineered, natural skin substitutes. At present, as the clinical standard considered by the physicians may be use of available biological skin substitutes, e.g., human allogeneic skin, in vitro cultured skin cells, acellular dermal matrix ADM and revitalized ADMs, etc. (Busuioc et al. Rom J Morphol Embryol 4:1061-1067, 2012; Kitala D, Kawecki M, Klama-Baryla A, Labus W, Kraut M, Glik J, Ryszkiel I, Kawecki MP, Nowak M. Allogeneic vs. Autologous Skin Grafts in the Therapy of Patients with Burn Injuries: A Restrospective, Open-label Clinical Study with Pair Matching. Adv Clin Exp Med. 2016 Sep-Oct;25(5):923-929.; Glik J, Kawecki M, Kitala D, Klama-Baryla A, Labus W, Grabowski M, Durdzinska A, Nowak M, Misiuga M, Kasperczyk A. A new option for definitive burn wound closure - pair matching type of retrospective case-control study of hand burns in the hospitalised patients group in the Dr Stanislaw Sakiel Center for Burn Treatment between 2009 and 2015. Int Wound J. 2017 Feb 21. https://doi.org/10.1111/iwj.12720 . [Epub ahead of print]; Prim et al. May 24Wound Repair Regen., 2017; Grossova et al. Mar 31Ann Burns Fire Disasters 30:5-8, 2017; Labus et al. FebJ Biomed Mater Res B Appl Biomater 106:726-733, 2018).


Assuntos
Pele Artificial , Estudos de Casos e Controles , Humanos , Estudos Retrospectivos , Pele , Transplante de Pele , Engenharia Tecidual
15.
Materials (Basel) ; 14(17)2021 Aug 24.
Artigo em Inglês | MEDLINE | ID: mdl-34500876

RESUMO

This work aimed to assess the impact of acellularization and sterilization methods on the mechanical properties of biocomposites used as a skin substitute. On the basis of the statistical analysis, it was ascertained that the values of the Young modulus for the samples before the sterilization process-only in the cases of substances such as: trypsin, 15% glycerol and dispase-changed in a statistically significant way. In the case of dispase, the Young modulus value before the sterilization process amounted to 66.6 MPa, for trypsin this value equalled 33.9 MPa, whereas for 15% glycerol it was 11 MPa. In the case of samples after the completion of the sterilization process, the analysis did not show any statistically significant differences between the obtained results of Young's modulus depending on the respective reagents applied. It was confirmed that different methods of acellularization and the process of sterilization effect the alteration of mechanical properties of allogeneic skins. In the case of the decellularization method using SDS (Sodium Dodecyl Sulfate), liquid nitrogen and 85% glycerol the highest values of strain were observed. In the authors' opinion, it is the above-mentioned methods that should be recommended in the process of preparation of skin substitutes.

16.
J Cosmet Dermatol ; 20(9): 2887-2893, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33232565

RESUMO

BACKGROUND: Toxic epidermal necrolysis (TEN) (also known as Lyell syndrome) and Stevens-Johnson syndrome (SJS) are life-threatening mucocutaneous blistering diseases. They are characterized by generalized blisters and epidermal inflammation, most likely resulting from the administration or interaction of medicines. AIMS: To report potential new method in the treatment of TEN. PATIENTS/METHODS: This article presents a case report of a 35-year-old man suffering from TEN covering about 95% of his body surface. Lesions occurred in the patient during antiepileptic therapy, after taking simultaneously amoxicillin (with clavulanic acid) and naproxen followed by lamotrigine treatment. Standard general treatment was performed. Intravenous feeding was necessary. Due to acute respiratory failure, the patient required mechanical ventilation. Two methods were combined in topical treatment: application of platelet-rich plasma (PRP) and a simultaneous biostatic human amnion transplant. RESULTS: In the presented case, the combination of both methods contributed to a significant acceleration of wound healing. After the application of PRP and biostatic amnion transplantation, the healing of wounds on the back and posterior surfaces of the legs was completed after six days. The surgical treatment most probably contributed to a significant acceleration of wound healing. CONCLUSION: The case report shows that topical TEN/SJS treatment with biostatic human amnion and PRP has a positive clinical effect and may be a new method of treatment of TEN.


Assuntos
Plasma Rico em Plaquetas , Síndrome de Stevens-Johnson , Administração Tópica , Adulto , Âmnio , Humanos , Masculino , Síndrome de Stevens-Johnson/tratamento farmacológico , Cicatrização
17.
Transplant Proc ; 52(7): 2218-2222, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32684370

RESUMO

Although new therapeutic approaches for burn treatment have made progress, there is still need for efficient coverage of donor fields. Promising dressing for skin graft donor site should be biocompatible, attach easily to the wound bed, remain in place until donor site has renewed, and decrease morbidity at the site. Porcine skin may be applied as a dressing for severe burns. Therefore pig skin xenografts can be used also as donor field coverage. In the Burn Treatment Centre, we used gauze soaked in Vaseline to secure donor fields. The aim of the study was to check if transgenic porcine skin is better than standard in donor site coverage used in our center. We showed that dressing reduces pain experienced by patients. The dressing leads to a reduction of hospitalization time by an average of 8 days. The dressing is as safe as the gold standard. Securing the donor field reduces the risk of colonization of the wound in the second smear after application by 60%. The disadvantage of the dressing is the inability to absorb blood; the use of hemostatic ointments in combination with the skin of transgenic pigs should be considered in the future.


Assuntos
Derme Acelular , Queimaduras/cirurgia , Transplante de Pele/métodos , Transplante Heterólogo/métodos , Resultado do Tratamento , Derme Acelular/efeitos adversos , Adulto , Idoso , Animais , Animais Geneticamente Modificados , Infecções Bacterianas/epidemiologia , Infecções Bacterianas/etiologia , Curativos Biológicos/efeitos adversos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dor/epidemiologia , Dor/etiologia , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Transplante de Pele/efeitos adversos , Suínos , Transplante Heterólogo/efeitos adversos
18.
Transplant Proc ; 52(7): 2198-2203, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32690311

RESUMO

Amniotic stem cells promote adhesion and migration of epithelial cells. Obtaining a full sheet containing amniotic stem cells seems to be the best solution for the treatment of burn wounds. The main advantage of this method is obtaining a full sheet of cells by lowering the temperature below the transition temperature, which does not affect extracellular matrix. The purpose of this work was to produce a skin substitute-a full sheet consisting of amniotic mesenchymal stem cells-and compare with well-known fibroblast sheet. Amniotic membrane cells revealed better tendency to full sheet detachment than fibroblasts. Confluence after 24 hours was always higher on polymer-coated dishes than on normal polypropylene dishes. Also viability was higher than on the control culture dish, while the number of apoptotic cells was always highest on polypropylene (control). Ile-Lys-Val-ala-Val (IKVAV) 0.28 addition to poly (poly [ethylene glycol] ethyl methacrylate) (PTEGMA) caused best cell confluence and highest percentage of cells in mitosis phase of cell cycle, but also worst cell detachment was observed in both cell types on PTEGMA IKVAV 0.28. Viability of cells transferred in cell sheet form onto a new culture dish was higher than when detached as suspension enzymatically. Additionally, percentage of apoptotic cells transferred in cell sheet form onto a new culture dish was always lower than when detached as suspension enzymatically. Culturing of PTEGMA, PTEGMA IKVAV 0.28 and PTEGMA IKVAV 0.14 have a stimulating effect on number of cells in mitosis in amniotic cell culture even after cell sheet transfer onto a new dish, whereas such effect with fibroblast was not observed.


Assuntos
Técnicas de Cultura de Células/métodos , Células-Tronco Mesenquimais/citologia , Metacrilatos , Polietilenoglicóis , Engenharia Tecidual/métodos , Âmnio/citologia , Animais , Adesão Celular , Células Cultivadas , Feminino , Gravidez , Temperatura
19.
Transplant Proc ; 52(7): 2231-2235, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32474001

RESUMO

There are several causes leading to the loss of cellular material earmarked for transplantation. This paper aims to evaluate the number of lost donors and lost cells in the culture by means of verifying both the results of the qualification tests and the presence of microorganisms in the cellular material. The analysis involved 86 donors hospitalized for thermal burns, from whom cells were harvested for keratinocyte and fibroblast cultures in the years 2011 to 2015. All potential donors underwent qualification tests: Anti-HIV-1,2; HBsAg; Anti-HCV-Ab; HBc, and a specific test for syphilis. In the case of skin fragments collected for culturing, the microbiological tests included the carrying fluid, the medium after 1 change, and the medium during culturing and before transplantation. Skin donors for cell cultures were assigned to the groups based on if the skin was collected up to 7 days following the burn or later. On average, 12% of the disqualifications were reported among donors for cell culturing. The most frequent cause of donor disqualification (54% of all disqualifications) was a positive HBc(+). The occurrence of fungal infections detected in the cellular material was over 30%. Establishing the culture after day 7 following the injury immediately increases the risk of infection by 25% in comparison to those cultures established before or on day 7 following the injury. Proper disinfection of donor place is crucial, but sometimes insufficient for maintenance sterility in cell culture. The risk of infection increases 25% after 7 following the injury.


Assuntos
Queimaduras/cirurgia , Técnicas de Cultura de Células/métodos , Fibroblastos , Infecções/microbiologia , Queratinócitos , Transplante de Pele , Feminino , Fibroblastos/microbiologia , Fibroblastos/transplante , Humanos , Queratinócitos/microbiologia , Queratinócitos/transplante , Masculino , Doadores de Tecidos
20.
Transplant Proc ; 52(7): 2193-2197, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32505501

RESUMO

BACKGROUND: The placenta is worthy of consideration as a source of tissues for transplantation. Porcine material preparation allows significantly more grafts to be obtained than human material. Amniotic cells are a very practicable stem cell type and easy to obtain with great potential, compared with, for instance, adipose-derived stem cells. The aim of this paper was to verify if porcine transgenic amnion and umbilical cord could be as effective for xenotransplantation of stem cells as human material. METHODS: Oxytocin was administered to the sows on the day the material was obtained. The obtained material was divided by weight into 4 relatively equal parts, which were transferred into 1 of 4 containers. The containers had different transport media and a concentration of antibiotics. After cell isolation by homogenization, the number of live, dead, and apoptotic cells was assessed. RESULTS: Maintaining the sterility when obtaining material from breeding pigs was the biggest problem. Transport medium, despite the addition of antibiotics, was in most cases infected. Tests revealed that porcine cells have a tendency to leave tissue material and adhere to plastic as human cells do. Porcine cells are also fibroblast like, which can suggest that these cells might be tested for the presence of mesenchymal stem cells. However, some differences are visible in all parameters, which can result from contamination of material or improper transport medium. There were significant differences between viability and apoptotic cell number in human and transgenic pig cells isolated from both sources---amniotic membrane and umbilical cord.


Assuntos
Âmnio/citologia , Separação Celular/métodos , Células-Tronco Mesenquimais/citologia , Cordão Umbilical/citologia , Animais , Animais Geneticamente Modificados , Feminino , Humanos , Gravidez , Suínos , Transplante Heterólogo
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