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Chronic wound healing

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https://www.readbyqxmd.com/read/28640580/a-bio-inspired-alginate-gum-arabic-hydrogel-with-micro-nano-scale-structures-for-controlled-drug-release-in-chronic-wound-healing
#1
Mi Li, Haichang Li, Xiangguang Li, Hua Zhu, Zihui Xu, Lianqing Liu, Jianjie Ma, Mingjun Zhang
Bio-polymeric hydrogels have drawn increasingly research interests in biomaterials due to its tunable physical and chemical properties for both creating bioactive cellular micro-environment and serving as sustainable therapeutic reagents. Inspired by a naturally occurring hydrogel secreted from the carnivorous Sundew plant for trapping insects, here we have developed a bio-inspired hydrogel to deliver mitsugumin53 (MG53), an important protein in cell membrane repair, for chronic wound healing. Both chemical compositions and micro/nano morphological properties inherent from the natural Sundew hydrogel were mimicked using sodium alginate and gum arabic with calcium ion-mediated cross-linking...
June 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28636254/pirfenidone-reduces-subchondral-bone-loss-and-fibrosis-after-murine-knee-cartilage-injury
#2
Deva D Chan, Jun Li, Wei Luo, Dan N Predescu, Brian J Cole, Anna Plaas
Pirfenidone is an anti-inflammatory and anti-fibrotic drug that has shown efficacy in lung and kidney fibrosis. Because inflammation and fibrosis have been linked to the progression of osteoarthritis, we investigated the effects of oral Pirfenidone in a mouse model of cartilage injury, which results in chronic inflammation and joint-wide fibrosis in mice that lack hyaluronan synthase 1 (Has1(-/-) ) in comparison to wild-type. Femoral cartilage was surgically injured in wild-type and Has1(-/-) mice, and Pirfenidone was administered in food starting after 3 days...
June 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28628259/exercise-prior-to-but-not-concomitant-with-stress-reverses-stress-induced-delayed-skin-wound-healing
#3
Bianca O Saguie, Bruna Romana-Souza, Rayssa L Martins, Andréa Monte-Alto-Costa
Stress-induced prolonged inflammation impairs cutaneous wound healing. Exercise may inhibit this effect via an anti-inflammatory mechanism. Our aim was to investigate the effect of moderate exercise on skin wound healing in chronically stressed mice. Mice were trained five times per week on a treadmill or received no training. Mice underwent daily rotational stress from the 6(th) week until euthanasia. During the 8(th) week, two wounds were created in the dorsum and collected 10 days later. A control group only received wounds...
June 19, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28624002/pathophysiology-of-venous-ulceration
#4
REVIEW
Joel M Crawford, Brajesh K Lal, Walter N Durán, Peter J Pappas
Our understanding of the pathophysiologic process of venous ulceration has dramatically increased during the past two decades because of dedicated, venous-specific basic science research. Currently, the mechanisms regulating venous ulceration are a combination of macroscopic and microscopic pathologic processes. Macroscopic alterations refer to pathologic processes related to varicose vein formation, vein wall architecture, and cellular abnormalities that impair venous function. These processes are primarily caused by genetic factors that lead to the destruction of normal vein wall architecture and venous hypertension...
July 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28621502/amniotic-membrane-stimulates-cell-migration-by-modulating-transforming-growth-factor-%C3%AE-signaling
#5
Catalina Ruiz-Cañada, Ángel Bernabé-García, Sergio Liarte, Carmen Luisa Insausti, Diego Angosto, José María Moraleda, Gregorio Castellanos, Francisco José Nicolás
Keratinocyte migration is a mandatory aspect of wound-healing. We have previously shown that Amniotic Membrane (AM) applied to chronic wounds assists healing through a process resulting in overexpression of c-Jun at the wound's leading edge. Also, we have demonstrated that amniotic membrane modifies the genetic program induced by TGF-ß in chronic wounds. In this paper, we used a scratch assay of Mv1Lu and HaCaT cells to examine the influence of AM application on the underlying signaling during scratch closure...
June 16, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28621240/il-36%C3%AE-suppresses-proliferation-of-ovarian-cancer-cells
#6
Lei Chang, Ruixia Guo, Zhongfu Yuan
Interleukin-36α (IL-36α), also formerly known as IL-1F6, is pertaining to IL-1 family members that has been shown to play an important pro-inflammatory role in chronic immune disorders. However, the role IL-36α in the setting of cancer remains unknown. Here, in our study, to investigate the clinical relevance of IL-36α in ovarian cancer, clinicopathological significance as well as expression level of IL-36α were analyzed in epithelial ovarian cancer clinical tissues and paired normal control. To explore the biological role of IL-36α in vitro in epithelial ovarian cancer cells, both overexpression and knockdown of IL-36α were performed...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28620820/cytoglobin-inhibits-migration-through-pi3k-akt-mtor-pathway-in-fibroblast-cells
#7
Selami Demirci, Ayşegül Doğan, Hüseyin Apdik, Emre Can Tuysuz, Sukru Gulluoglu, Omer Faruk Bayrak, Fikrettin Şahin
Cell proliferation and migration are crucial in many physiological processes including development, cancer, tissue repair, and wound healing. Cell migration is regulated by several signaling molecules. Identification of genes related to cell migration is required to understand molecular mechanism of non-healing chronic wounds which is a major concern in clinics. In the current study, the role of cytoglobin (CYGB) gene in fıbroblast cell migration and proliferation was described. L929 mouse fibroblast cells were transduced with lentiviral particles for CYGB and GFP, and analyzed for cell proliferation and migration ability...
June 15, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28620441/impaired-wound-healing-facts-and-hypotheses-for-multi-professional-considerations-in-predictive-preventive-and-personalised-medicine
#8
REVIEW
Eden Avishai, Kristina Yeghiazaryan, Olga Golubnitschaja
Whereas the physiologic wound healing (WH) successfully proceeds through the clearly defined sequence of the individual phases of wound healing, chronic non-healing wounds/ulcers fail to complete the individual stages and the entire healing process. There are many risk factors both modifiable (such as stress, smoking, inappropriate alcohol consumption, malnutrition, obesity, diabetes, cardio-vascular disease, etc.) and non-modifiable (such as genetic diseases and ageing) strongly contributing to the impaired WH...
March 2017: EPMA Journal
https://www.readbyqxmd.com/read/28619238/mesenchymal-stem-cell-in-venous-leg-ulcer-an-intoxicating-therapy
#9
REVIEW
Anjali Athanerey, Pradeep Kumar Patra, Awanish Kumar
Venous leg ulcers (VLU) are a prevalent and reoccurring type of complicated wound, turning as a considerable public healthcare issue, with critical social and economic concern. There are both medical and surgical therapies to treat venous leg ulcers; however, a cure does not yet exist. Mesenchymal stem cells (MSC) are capable and proved of accelerating wound healing in vivo and their study with human chronic wounds is currently awaited. MSCs are a promising source of adult progenitor cells for cellular therapy and have been demonstrated to differentiate into various mesenchymal cell lineages...
June 7, 2017: Journal of Tissue Viability
https://www.readbyqxmd.com/read/28618841/assessment-of-solid-microneedle-rollers-to-enhance-transmembrane-delivery-of-doxycycline-and-inhibition-of-mmp-activity
#10
Abbie Omolu, Maryse Bailly, Richard M Day
Many chronic wounds exhibit high matrix metalloproteinase (MMP) activity that impedes the normal wound healing process. Intradermal delivery (IDD) of sub-antimicrobial concentrations of doxycycline, as an MMP inhibitor, could target early stages of chronic wound development and inhibit further wound progression. To deliver doxycycline intradermally, the skin barrier must be disrupted. Microneedle rollers offer a minimally invasive technique to penetrate the skin by creating multiple microchannels that act as temporary conduits for drugs to diffuse through...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28616231/lymph-node-transfer-for-refractory-infectious-sites-caused-by-trauma
#11
Makoto Mihara, Hisako Hara, Kazuki Kikuchi
OBJECTIVE: In this report, we placed focus on the immunological function of lymph nodes and performed lymph node transfer via a free flap to a site of refractory infection. CASE AND RESULTS: Case 1 describes a 34-year-old male suffering from compound fractures with severe crush injuries and burns in the right ankle joint. A 20 × 15 cm skin defect was observed around the right malleolus medialis, along with denuded tendons with bacterial infection. After conservative treatment, we transferred a lymph-node-containing free superficial circumflex iliac artery perforator flap to the region, with minimum debridement...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28615025/copaiba-oil-resin-copaifera-reticulata-ducke-modulates-the-inflammation-in-a-model-of-injury-to-rats-tongues
#12
Francisco Bruno Teixeira, Raíra de Brito Silva, Osmar Alves Lameira, Liana Preto Webber, Roberta Souza D'Almeida Couto, Manoela Domingues Martins, Rafael Rodrigues Lima
BACKGROUND: The regeneration of integrity and tissue homeostasis after injury is a fundamental property and involves complex biological processes fully dynamic and interconnected. Although there are medications prescribed to accelerate the process of wound healing by reducing the exaggerated inflammatory response, comes the need to search for different compounds of Amazonian biodiversity that can contribute to the acceleration of the healing process. Among these products, the copaiba oil-resin is one of the most prominent feature in this scenario, as they have been reported its medicinal properties...
June 14, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28612149/35-year-experience-with-surgical-treatment-of-hidradenitis-suppurativa
#13
Richard E Burney
BACKGROUND: Hidradenitis suppurativa is a painful and disfiguring chronic inflammatory condition affecting both men and women. Medical treatments, such as antibiotics and immunosuppressive agents, are often ineffective. Over time, patients can suffer from recurrent abscesses, chronic purulent drainage, scarring, and contractures that can only be corrected by surgical excision. There is no agreement, however, on the best way for the surgeon to manage this condition. The purpose of this review is to describe the results of surgical treatment of this condition in a large cohort of patients managed by local excision of hidradenitis, healing by secondary intention and reoperation as needed...
June 13, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28607863/immediate-regrafting-of-the-split-thickness-skin-graft-donor-site-assists-healing
#14
Brian P Bradow, Geoffrey G Hallock, Samuel P Wilcock
BACKGROUND: Delayed or even lack of healing of a split-thickness skin graft (STSG) donor site is a potential problem with elderly patients or those with poor wound healing capabilities. A proactive solution that may minimize this risk is to regraft that donor site using otherwise discarded skin graft remnants. METHODS: A prospective, nonrandomized, consecutive study was designed to compare the time to healing of the commonly used anterior thigh STSG donor site in patients who had routine dressings (n = 113) versus those with comorbidities known to adversely affect wound healing and had planned regrafting (n = 204)...
May 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28607463/exploring-a-role-for-regulatory-mirnas-in-wound-healing-during-ageing-involvement-of-mir-200c-in-wound-repair
#15
Eerik Aunin, David Broadley, Mohammed I Ahmed, Andrei N Mardaryev, Natalia V Botchkareva
Multiple factors and conditions can lead to impaired wound healing. Chronic non-healing wounds are a common problem among the elderly. To identify microRNAs negatively impacting the wound repair, global miRNA profiling of wounds collected from young and old mice was performed. A subset of miRNAs that exhibited an age-dependent expression pattern during wound closure was identified, including miR-31 and miR-200c. The expression of miR-200 family members was markedly downregulated upon wounding in both young and aged mice, with an exception of acute upregulation of miR-200c at the early phase of wound healing in aged skin...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28605991/-i-in-vivo-i-assessment-of-engineered-skin-cell-delivery-with-multimodal-optical-microscopy
#16
Andrew J Bower, Ziad Mahmassani, Youbo Zhao, Eric J Chaney, Marina Marjanovic, Min Kyung Lee, Benedikt Graf, Michael De Lisio, Hyun Joon Kong, Marni D Boppart, Stephen A Boppart
The healing process is often significantly impaired under conditions of chronic or large area wounds, which are often treated clinically using autologous split-thickness skin grafts. However, in many cases, harvesting of donor tissue presents a serious problem such as in the case of very large area burns. In response to this, engineered biomaterials have emerged that attempt to mimic the natural skin environment or deliver a suitable therapy to assist in the healing process. In this study, a custom-built multimodal optical microscope capable of noninvasive structural and functional imaging is used to investigate both the engineered tissue microenvironment and the <i>in vivo</i> wound healing process...
June 12, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28605543/dual-action-of-bacteriocin-plnc8-%C3%AE-%C3%AE-through-inhibition-of-porphyromonas-gingivalis-infection-and-promotion-of-cell-proliferation
#17
Torbjörn Bengtsson, Boxi Zhang, Robert Selegård, Emanuel Wiman, Daniel Aili, Hazem Khalaf
Periodontitis is a chronic inflammatory disease that is characterized by accumulation of pathogenic bacteria, including Porphyromonas gingivalis, in periodontal pockets. The lack of effective treatments has emphasized in an intense search for alternative methods to prevent bacterial colonization and disease progression. Bacteriocins are bacterially produced antimicrobial peptides gaining increased consideration as alternatives to traditional antibiotics. We show rapid permeabilization and aggregation of P. gingivalis by the two-peptide bacteriocin PLNC8 αβ...
June 12, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28604551/the-periosteal-medial-femoral-condyle-free-flap-a-new-option-for-soft-tissue-reconstruction-of-the-distal-lower-extremity
#18
Noah H Saad, Matthew E Pontell, Brian S Winters, Joseph Daniel, Adam Saad
BACKGROUND: Small (<30 cm) soft tissue defects of the distal leg, foot, and ankle pose a complicated issue with regard to wound healing. Multiple flaps have been proposed for reconstruction of these wounds with varying levels of success. The medial femoral condyle flap is a free bone flap supplied by the descending geniculate artery. It is currently used in the treatment of fracture nonunion, infected bone defects, avascular necrosis, and osteoradionecrosis. This study proposes the use of the periosteal portion of the medial femoral condyle (PMFC) flap for soft tissue reconstruction of the distal leg, foot, and ankle...
June 9, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28599845/evaluating-a-novel-oxygenating-therapeutic-for-its-potential-use-in-the-advancement-of-wound-healing
#19
Jennifer Gueldner, Fan Zhang, Bernd Zechmann, Erica D Bruce
Non-gaseous oxygen therapeutics are emerging technologies in regenerative medicine that aim to sidestep the undesirable effects seen in traditional oxygen therapies, while enhancing tissue and wound regeneration. Using a novel oxygenating therapeutic (Ox66™) several in vitro models including fibroblast and keratinocyte monocultures were evaluated for potential drug toxicity, the ability of cells to recover after chemical injury, and cell migration after scratch assay. It was determined that in both cell lines, there was no significant cytotoxicity found after independent treatment with Ox66™...
June 7, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28599100/emt-and-inflammation-inseparable-actors-of-cancer-progression
#20
REVIEW
Meggy Suarez-Carmona, Julien Lesage, Didier Cataldo, Christine Gilles
Tumors can be depicted as wounds that never heal, and are infiltrated by a large array of inflammatory and immune cells. Tumor-associated chronic inflammation is a hallmark of cancer that fosters progression to a metastatic stage, as has been extensively reviewed lately. Indeed, inflammatory cells persisting in the tumor establish a cross-talk with tumor cells that may result in a phenotype switch into tumor-supporting cells. This has been particularly well described for macrophages and is referred to as tumor-associated "M2" polarization...
June 9, 2017: Molecular Oncology
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