A skin-inspired 3D bilayer scaffold enhances granulation tissue formation and anti-infection for diabetic wound healing

2019 ◽  
Vol 7 (18) ◽  
pp. 2954-2961 ◽  
Author(s):  
Wenbing Wan ◽  
Feng Cai ◽  
Jiayu Huang ◽  
Shixuan Chen ◽  
Qi Liao
Keyword(s):  
Wound Healing ◽  
Granulation Tissue ◽  
Bottom Layer ◽  
Tissue Formation ◽  
Collagen Deposition ◽  
Diabetic Wound ◽  
3D Scaffold ◽  
Granulation Tissue Formation ◽  
Diabetic Wound Healing ◽  
3D Printed

We design and fabricate a bilayer 3D scaffold inspired by the structure of skin. The top layer is made of silver loaded GelMA cryogel to prevent infection. The bottom layer is made of a PDGF-BB loaded 3D printed scaffold to promotes angiogenesis and collagen deposition to accelerate granulation tissue formation.

Extracellular vesicles derived from adipose-derived stem cells accelerate diabetic wound healing by suppressing the expression of matrix metalloproteinase-9

2021 ◽  
Vol 22 ◽  
Author(s):  
Jiang-wen Wang ◽  
Yuan-zheng Zhu ◽  
Xuan Hu ◽  
Jia-ying Nie ◽  
Zhao-hui Wang ◽  
...  
Keyword(s):  
Stem Cells ◽  
Wound Healing ◽  
Mouse Model ◽  
Adipose Derived Stem Cells ◽  
Collagen Deposition ◽  
Diabetic Wound ◽  
Diabetic Wound Healing ◽  
Diabetic Wounds ◽  
Metalloproteinase 9

Background: The healing of diabetic wounds is poor due to a collagen deposition disorder. Matrix metalloproteinase-9 (MMP-9) is closely related to collagen deposition in the process of tissue repair. Many studies have demonstrated that extracellular vesicles derived from adipose-derived stem cells (ADSC-EVs) promote diabetic wound healing by enhancing collagen deposition. Objective: In this study, we explored if ADSC-EVs could downregulate the expression of MMP-9 in diabetic wounds and promote wound healing by improving collagen deposition. The potential effects of ADSC-EVs on MMP-9 and diabetic wound healing were tested both in vitro and in vivo. Methods: We first evaluated the effect of ADSC-EVs on the proliferation and MMP-9 secretion of HaCaT cells treated with advanced glycation end product-bovine serum albumin (AGE-BSA), using CCK-8 western blot and MMP-9 enzyme-linked immunosorbent assay(ELISA). Next, the effect of ADSC-EVs on the healing, re-epithelialisation, collagen deposition, and MMP-9 concentration in diabetic wound fluids was evaluated in an immunodeficient mouse model via MMP-9 ELISA and haematoxylin and eosin, Masson’s trichrome, and immunofluorescence staining for MMP-9. Results: In vitro, ADSC-EVs promoted the proliferation and MMP-9 secretion of HaCaT cells.In vivo, ADSC-EVs accelerated diabetic wound healing by improving re-epithelialisation and collagen deposition and by inhibiting the expression of MMP-9. Conclusion: ADSC-EVs possessed the healing of diabetic wounds in a mouse model by inhibiting downregulating MMP-9 and improving collagen deposition.Thus ,ADSC-EVs are a promising candidate for the treatment of diabetic wounds .

scholarly journals Effectivity of topical mangosteen pericarp extract cream on wound healing in Swiss albino mice

2019 ◽  
Vol 92 (2) ◽  
Author(s):  
Hilda Brigitta Sombolayuk ◽  
Khairuddin Djawad ◽  
Siswanto Wahab ◽  
Upik A. Miskad ◽  
Gemini Alam ◽  
...  
Keyword(s):  
Wound Healing ◽  
Granulation Tissue ◽  
Inflammatory Cells ◽  
Control Group ◽  
Tissue Formation ◽  
Granulation Tissue Formation ◽  
Swiss Albino Mice ◽  
Accelerate Wound Healing ◽  
Acute Wound ◽  
Albino Mice

Wound healing is a complex physiological process consisting of four phases: coagulation, inflammation, proliferation and migration, and remodeling, each with distinct characteristics. Studies have suggested that mangosteen pericarp extract (MPE) may accelerate wound healing. However, the mechanism has not been fully understood. This study aims to evaluate the effect of MPE cream in various concentrations in acute wound healing of albino mice, both histologically and macroscopically. Thirty-two healthy female Swiss albino mice, aged 6-9 weeks, weight 20-30 g, were included in this study. The samples were randomly divided into eight groups each consisting of 4 mice. The first four groups were treated with MPE cream 5%, 10%, and 20%, and no medication (control group), respectively, and were sacrificed after three days. The other four groups received the same application and were sacrificed after 8 days. Wound bed diameter was measured and biopsy from the skin lesion was performed for histopathologic examination. Mann-Whitney test was used to analyze the diameter of the wound bed and histopathological findings of granulation tissue formation, reepithelialization, and inflammation, with P<0.05 considered as significant. MPE cream significantly improved wound healing by increasing granulation tissue formation, and reepithelialization. In addition, MPE cream application was also shown to decrease the number of inflammatory cells, particularly in 5% and 10% concentrations, both in the 3-day and 8-day groups. MPE cream application can accelerate wound healing and thus can be used in acute wound treatment.

Biomimetic thermoplastic polyurethane porous membrane with hierarchical structure accelerates wound healing by enhancing granulation tissue formation and angiogenesis

RSC Advances ◽  
2016 ◽  
Vol 6 (101) ◽  
pp. 99595-99603 ◽  
Author(s):  
Qiang Lei ◽  
Zhichao Li ◽  
Rui Xu ◽  
Yuzhen Wang ◽  
Haisheng Li ◽  
...  
Keyword(s):  
Wound Healing ◽  
Hierarchical Structure ◽  
Granulation Tissue ◽  
Wound Dressing ◽  
Thermoplastic Polyurethane ◽  
Porous Membrane ◽  
Tissue Formation ◽  
Granulation Tissue Formation

Wound dressing with hierarchical structure enhances wound healing.

scholarly journals RapidlyIn SituForming Platelet-Rich Plasma Gel Enhances Angiogenic Responses and Augments Early Wound Healing after Open Abdomen

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Bo Zhou ◽  
Jianan Ren ◽  
Chao Ding ◽  
Yin Wu ◽  
Dong Hu ◽  
...  
Keyword(s):  
Wound Healing ◽  
Growth Factor ◽  
Granulation Tissue ◽  
Open Abdomen ◽  
Transforming Growth Factor ◽  
Platelet Rich Plasma ◽  
Tissue Formation ◽  
Granulation Tissue Formation ◽  
Abdominal Hypertension ◽  
Early Wound

Objective.The purposes of our present study were to evaluate the potential of platelet-rich plasma gel to enhance granulation tissue formation after open abdomen and to examine whether the effect was attributable to stimulating rapid neovascularization.Methods.Twenty-four rats underwent colon ascendens stent peritonitis surgery to induce sepsis, followed by intraperitoneal injection of nitrogen to create intra-abdominal hypertension. Four hours later, laparotomies were performed. The rats were randomized into three groups (n=8for each group): control, platelet-poor plasma (PPP), and platelet-rich plasma (PRP) groups. One week after the treatment, granulation tissue formation and angiogenesis were evaluated by histological and laser Doppler analysis.Results.The resultant platelet count in platelet-rich plasma was higher than that of PPP. The concentrations of platelet-derived growth factor BB, transforming growth factorβ-1, and vascular endothelial growth factor in PRP were significantly higher when compared with that of PPP. Myofibroblast count, granulation tissue thickness, vessel numbers, and blood perfusion were increased in PRP group, followed by PPP group, with control being the least.Conclusion.Rapidlyin situforming platelet-rich plasma gel promoted remarkable neovascularization and early wound healing after open abdomen and may lead to novel and effective treatments for open abdominal wounds.

scholarly journals Effect of Newly Synthesized Polypropylene/Silver Nonwoven Fabric Dressing on Incisional Wound Healing in Rats

2014 ◽  
Vol 2 (3) ◽  
pp. 395-403 ◽  
Author(s):  
Samiha M. Gawish ◽  
Amina A. Gamal El Din ◽  
Hanaa H. Ahmed ◽  
Abdel Razik H. Farrag ◽  
Amira Abou-El Kheir
Keyword(s):  
Wound Healing ◽  
Granulation Tissue ◽  
Nonwoven Fabric ◽  
Complete Healing ◽  
Albino Rats ◽  
Tissue Formation ◽  
Histopathological Changes ◽  
Granulation Tissue Formation ◽  
Wound Length ◽  
Incision Wound

AIM: The present work aimed to investigate the effect of the antimicrobial nano Ag/polypropylene (PP\Ag) dressing on incisional wound healing on the experimental level.MATERIALS AND METHODS: Male albino rats were divided into, control, PP/Ag dressing, Silver Sulfadiazine (Ag-SD) cream, blank PP dressing and undressed groups. Animals were sacrificed after 5, 10 and 15 days of incisional wound event.RESULTS: Reduction was found in incision wound length in PP/Ag dressed rats, Ag-SD cream treated rats, and blank PP dressed rats after 5, 10 and 15 days compared to undressed rats. Skin of PP/Ag group showed less adverse histopathological changes, enhanced granulation tissue formation, enhanced angiogenesis, accelerated re-epithelialization and quick complete healing; compared to all other groups. Significant decrease in TGF-β level was recorded in PP\Ag and Ag-SD cream groups as compared to blank PP group on day 5. While, significant decrease in TGF-β level was detected in PP\Ag group when compared with undressed and blank PP groups on day 10. TGF-β showed significant in PP\Ag group as compared to undressed, Ag-SD cream and blank PP groups on day 15. CONCLUSION: The present results suggest that PP/Ag dressing enhances, promotes and plays an important role in wound healing.

scholarly journals Healing Effects of Human Amniotic Membrane and Burned Wool on the Second-degree Burn in Rats

2020 ◽  
Vol 9 ◽  
pp. 1759
Author(s):  
Nader Tanideh ◽  
Farideh Keshavarzi ◽  
Aida Hemat Zadeh ◽  
Sajad Daneshi ◽  
Omid Koohi-Hosseinabadi ◽  
...  
Keyword(s):  
Wound Healing ◽  
Amniotic Membrane ◽  
Granulation Tissue ◽  
Male Rats ◽  
Control Group ◽  
Human Amniotic Membrane ◽  
Tissue Formation ◽  
Granulation Tissue Formation ◽  
Degree Burn ◽  
Second Degree

ackground: This study aimed to compare sheep burnt wool and human amniotic membrane (AM) on second-degree burn wound healing in rats. Materials and Methods: Seventy-two adult male rats of Sprague Dawley underwent general anesthesia, and a deep second-degree burn was created on their skin by a hot iron plate. Afterward, human AM, silver sulfadiazine ointment (SSD), and sheep burned wool were used on wound area for burn treatment. On days 7, 14, and 21 of the experiment, the rats were sacrificed, and histopathological assessments were done. Results: Human AM, in comparison with other groups, significantly (P<0.05) showed better improvement in all pathologic variables. Burned wool showed significant improvement compared to the control group on day 7 in the angiogenesis, on day 14 in granulation tissue formation and epithelial formation, and on day 21 in new epithelial formation (P<0.05). Burned wool compared with SSD ointment in granulation tissue formation improved significantly (P<0.05) on days 7 and 14. Also, SSD ointment in comparison with the control group significantly improved (P<0.05) granulation tissue formation and macrophage on day 7. Conclusion: Human AM has a significant effect on the treatment of second-degree burn. Burned wool has a better effect on wound healing than SSD ointment and negative control group without treatment in terms of granulation tissue and epithelium formation. [GMJ.2020;9:e1759]

A comparative study of phenytoin dressing versus honey dressing in the treatment of cronic ulcers in tertiary care hospital

2021 ◽  
Vol 19 (1) ◽  
pp. 05-09
Author(s):  
Sandesh M ◽  
Keyword(s):  
Wound Healing ◽  
Granulation Tissue ◽  
Chronic Wounds ◽  
Tertiary Care ◽  
Skin Grafting ◽  
Care Hospital ◽  
Tissue Formation ◽  
Granulation Tissue Formation ◽  
Diabetic Ulcers

Background: Diabetic foot infections are the leading cause of hospitalization morbidity and mortality in diabetics worldwide In India it accounts for 20% of hospitalizations. honey has been investigated to treat ulcers like pressure ulcers, venous ulcers, diabetic ulcers, traumatic wounds and burns. Phenytoin is also now known to promote wound healing and can be an alternative to normal saline specifically in chronic wounds related to diabetes. The present study compares these two modalities in management of diabetic ulcers. Objective: To compare the efficacy of topical phenytoin vs topical honey in chronic diabetic ulcers in terms of rate of wound healing, granulation tissue formation and quality of graft bed for skin grafting. Methods: A comparative prospective study of 50 patients with chronic diabetic ulcers selected based on a predefined criteria divided into two groups: Group A (Phenytoin group) (n=25) and Group B (honey group) (n=25). Final wound area was measured on 30th day. Comparison between the wound size reduction among two groups done at end of 30th day. Outcome was measured in terms of wound reduction, granulation tissue formation and quality of bed for skin grafting between the two groups. Results: This study has shown faster rate of wound healing, better granulation tissue formation and quality graft bed for skin grafting in patients who received topical phenytoin dressing as compared to topical honey dressing.

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