Topically Applied Cmt-2 Enhances Wound Healing in Streptozotocin Diabetic Rat Skin

1998 ◽  
Vol 12 (1) ◽  
pp. 144-148 ◽  
Author(s):  
N.S. Ramamurthy ◽  
A.J. Kucine ◽  
S.A. McClain ◽  
T.F. McNamara ◽  
L.M. Golub
Keyword(s):  
Wound Healing ◽  
Granulation Tissue ◽  
Chronic Wounds ◽  
Diabetic Rats ◽  
Diabetic Rat ◽  
Delayed Wound Healing ◽  
Chemically Modified ◽  
Secondary Intention ◽  
Valuable Adjunct ◽  
Thickness Skin

Delayed wound healing is one of the complications of diabetes mellitus, exhibited by increased wound collagenase and decreased granulation tissues. The current study compared wound healing in normal and diabetic rats, and the effects of topically applied 1 % or 3% concentrations of chemically modified tetracycline-2 (CMT-2) on 6-mm circular full-thickness skin wounds healed by secondary intention. On day 7 after wounding, tissues were removed for biochemical analysis and histology. The wound granulation tissue hydroxyproline was less in the untreated diabetic rat with increased collagenase and gelatinase. Treating the diabetic rat wounds with 3% CMT-2 increased the wound hydroxyproline and decreased activities of gelatinase and collagenase. There was a delay in wound filling by granulation tissue in diabetic rats. In CMT-2-treated diabetic rats, the volume of granulation tissue was greater than that in untreated diabetic rats. CMT-2 appears to normalize wound healing in diabetic rats and may be a valuable adjunct in the treatment of chronic wounds.

scholarly journals Preparation of W/O Hypaphorine–Chitosan Nanoparticles and Its Application on Promoting Chronic Wound Healing via Alleviating Inflammation Block

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2830
Author(s):  
Mengting Qi ◽  
Xuerui Zhu ◽  
Xiaoyi Yu ◽  
Min Ai ◽  
Weiwei Cai ◽  
...  
Keyword(s):  
Wound Healing ◽  
Wound Repair ◽  
Chronic Wounds ◽  
Chronic Wound ◽  
Chitosan Nanoparticles ◽  
Average Diameter ◽  
Diabetic Rats ◽  
Diabetic Rat ◽  
Patients With Diabetes ◽  
Treatment Of Wounds

Chronic wound repair is a common complication in patients with diabetes mellitus, which causes a heavy burden on social medical resources and the economy. Hypaphorine (HYP) has good anti-inflammatory effect, and chitosan (CS) is used in the treatment of wounds because of its good antibacterial effect. The purpose of this research was to investigate the role and mechanism of HYP-nano-microspheres in the treatment of wounds for diabetic rats. The morphology of HYP-NPS was observed by transmission electron microscopy (TEM). RAW 264.7 macrophages were used to assess the bio-compatibility of HYP-NPS. A full-thickness dermal wound in a diabetic rat model was performed to evaluate the wound healing function of HYP-NPS. The results revealed that HYP-NPS nanoparticles were spherical with an average diameter of approximately 50 nm. The cell experiments hinted that HYP-NPS had the potential as a trauma material. The wound test in diabetic rats indicated that HYP-NPS fostered the healing of chronic wounds. The mechanism was through down-regulating the expression of pro-inflammatory cytokines IL-1β and TNF-α in the skin of the wound, and accelerating the transition of chronic wound from inflammation to tissue regeneration. These results indicate that HYP-NPS has a good application prospect in the treatment of chronic wounds.

scholarly journals EFFECTS OF PROBIOTICS SUPPLEMENTATION ON SKIN WOUND HEALING IN DIABETIC RATS

2020 ◽  
Vol 33 (1) ◽  
Author(s):  
Letícia Fuganti CAMPOS ◽  
Eliane TAGLIARI ◽  
Thais Andrade Costa CASAGRANDE ◽  
Lúcia de NORONHA ◽  
Antônio Carlos L. CAMPOS ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Wound Healing ◽  
Type I Collagen ◽  
Chronic Wounds ◽  
Skin Wound ◽  
Diabetic Rats ◽  
Control Group ◽  
Type I ◽  
Collagen Deposition ◽  
Skin Wound Healing

ABSTRACT Background: Chronic wounds in patients with Diabetes Mellitus often become incurable due to prolonged and excessive production of inflammatory cytokines. The use of probiotics modifies the intestinal microbiota and modulates inflammatory reactions. Aim: To evaluate the influence of perioperative supplementation with probiotics in the cutaneous healing process in diabetic rats. Methods: Forty-six rats were divided into four groups (C3, P3, C10, P10) according to the treatment (P=probiotic or C=control, both orally administered) and day of euthanasia, 3rd or 10th postoperative days. All rats were induced to Diabetes Mellitus 72 h before starting the experiment with alloxan. Supplementation was initiated five days before the incision and maintained until euthanasia. Scalpel incision was guided by a 2x2 cm mold and the wounds were left to heal per second-intention. The wounds were digitally measured. Collagen densitometry was done with Picrosirius Red staining. Histological parameters were analyzed by staining by H&E. Results: The contraction of the wound was faster in the P10 group which resulted in a smaller scar area (p=0.011). There was an increase in type I collagen deposition from the 3rd to the 10th postoperative day in the probiotic groups (p=0.016), which did not occur in the control group (p=0.487). The histological analysis showed a better degree of healing in the P10 group (p=0.005), with fewer polymorphonuclear (p<0.001) and more neovessels (p=0.001). Conclusions: Perioperative supplementation of probiotics stimulates skin wound healing in diabetic rats, possibly due to attenuation of the inflammatory response and increased neovascularization and type I collagen deposition.

Evaluation of the Effect of Platelet-Rich Fibrin on Wound Healing at Split-Thickness Skin Graft Donor Sites: A Randomized, Placebo-Controlled, Triple-Blind Study

2020 ◽  
pp. 153473461990043 ◽  
Author(s):  
Mojtaba Vaheb ◽  
Maryam Karrabi ◽  
Mahtab Khajeh ◽  
Alireza Asadi ◽  
Ehsan Shahrestanaki ◽  
...  
Keyword(s):  
Wound Healing ◽  
Chronic Wounds ◽  
Outcome Evaluation ◽  
Control Group ◽  
Platelet Rich Fibrin ◽  
Thickness Skin ◽  
Split Thickness Skin Grafting ◽  
Significant Difference ◽  
The Mean ◽  
And Control

Split-thickness skin grafting (STSG) is widely used to heal wounds resulting from trauma, burns, and chronic wounds. This study aimed to determine the true effect of platelet-rich fibrin (PRF) on patients with burn wounds requiring STSG during treatment of donor wounds. This randomized, triple-blind clinical trial was conducted on patients who referred to the burn ward of Vasei Hospital of Sabzevar, Iran, from May 2017 to May 2018. The donor site was randomly divided into 2 groups: PRF and control (Vaseline petrolatum gauze) using Vaseline gauze. In the intervention group, the PRF gel was applied to the wound and covered with Vaseline gauze and wet dressing. Conversely, only Vaseline gauze and wet dressing were applied to the control group. Outcome evaluation was conducted using paired t test and Wilcoxon signed rank-sum test, as appropriate, on days 8 and 15. The mean age of the patients was 33.10 ± 2.60 years, and 51.50% were male. The mean wound healing time in the PRF and control groups was 11.80 ± 3.51 and 16.30 ± 4.32 days, respectively ( P < .001). The PRF group showed significantly higher wound healing rates than the control group at 8 and 15 days dressing ( P < .001 and P < .001, respectively). Moreover, the mean wound healing for all wound healing indices diagnosed by 2 specialists in PRF was higher than control group on days 8 and 15 ( P < .001). We found a statistically significant difference on days 8 and 15 regarding the mean pain levels between the 2 groups ( P < .001). The findings showed that PRF can significantly increase the time and rate of donor wound healing compared with conventional treatment and also reduce the severity of pain.

scholarly journals Influence of irradiation on collagen content during wound healing in diabetic rats

2002 ◽  
Vol 16 (4) ◽  
pp. 293-298 ◽  
Author(s):  
Solange Maria de Almeida ◽  
Rívea Inês Ferreira ◽  
Frab Norberto Bóscolo
Keyword(s):  
Wound Healing ◽  
Electron Irradiation ◽  
Granulation Tissue ◽  
Polarized Light ◽  
Qualitative Evaluation ◽  
Diabetic Rats ◽  
Collagen Content ◽  
Time Intervals ◽  
Beam Radiation ◽  
Excisional Wound

The aim of the present experimental research was to investigate the effects of electron irradiation on the collagen content and on the organization of the granulation tissue of skin, in diabetic rats. In this study, 48 Wistar rats were assigned to 4 groups: control, irradiated, diabetic and irradiated diabetic. First, diabetes mellitus was induced in the last two groups, by means of a single intravenous injection of streptozotocin. Fifteen days later, all animals underwent a surgery in order to create an excisional wound on their anterior dorsal skin. On the third post-operative day, only an approximately 1-cm-wide area around the wounds was exposed to 1 Gy of 6 MeV electron beam radiation, which was delivered in a single dose. Wound healing was examined by means of polarized light microscopy at 4-, 7-, 13- and 21-day time intervals after wounding. Based upon an essentially qualitative evaluation, it was possible to conclude that local electron irradiation and diabetes' associated dysfunctions caused a decrease in the collagen content of newly-formed tissue, which was more pronounced in irradiated diabetic animals. The macromolecular organization of granulation tissue was delayed in irradiated, diabetic and irradiated diabetic animals, in relation to what was observed in control animals.

scholarly journals A Comparison of Wound Healing Rate Following Treatment with Aftamed and Chlorine Dioxide Gels in Streptozotocin-Induced Diabetic Rats

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Fouad Al-Bayaty ◽  
Mahmood Ameen Abdulla
Keyword(s):  
Wound Healing ◽  
Chlorine Dioxide ◽  
Cellular Proliferation ◽  
Radical Scavenging ◽  
Diabetic Control ◽  
Diabetic Rats ◽  
Control Group ◽  
Sprague Dawley ◽  
Thickness Skin ◽  
Group 2

Background and Purpose. This study aimed to evaluate the wound healing activities of Aftamed and chlorine dioxide gels in streptozotocin-induced diabetic rats. Experimental Approach. Forty-eight Sprague Dawley rats were chosen for this study, divided into 4 groups. Diabetes was induced. Two-centimeter-diameter full-thickness skin excision wounds were created. Animals were topically treated twice daily. Groups 1, the diabetic control group, were treated with 0.2 mL of sterile distilled water. Group 2 served as a reference standard were treated with 0.2 mL of Intrasite gel. Groups 3 and 4 were treated with 0.2 mL of Aftamed and 0.2 mL of chlorine dioxide gels respectively. Granulation tissue was excised on the 10th day and processed for histological and biochemical analysis. The glutathione peroxidase ,superoxide dismutase activities and the malondialdehyde (MDA) levels were determined. Results. Aftamed-treated wounds exhibited significant increases in hydroxyproline, cellular proliferation, the number of blood vessels, and the level of collagen synthesis. Aftamed induced an increase in the free radical-scavenging enzyme activity and significantly reduced the lipid peroxidation levels in the wounds as measured by the reduction in the MDA level. Conclusions. This study showed that Aftamed gel is able to significantly accelerate the process of wound healing in diabetic rats.

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.

Evaluation of Effect of Biologically Synthesized Ethanolic Extract of Propolis-Loaded Poly(-Lactic-co-Glycolic Acid) Nanoparticles on Wound Healing in Diabetic Rats

2022 ◽  
pp. 153473462110732
Author(s):  
Reza Tayfeh-Ebrahimi ◽  
Amir Amniattalab ◽  
Rahim Mohammadi
Keyword(s):  
Wound Healing ◽  
Treatment Group ◽  
Granulation Tissue ◽  
Glycolic Acid ◽  
Ethanolic Extract ◽  
Plga Nanoparticles ◽  
Diabetic Rats ◽  
Diabetic Wound ◽  
Wound Size ◽  
Ethanolic Extract Of Propolis

Wound healing is interaction of a complex cascade of cellular/biochemical actions leading to restoration of structural and functional integrity with regain of injured tissues strength. This study was aimed at evaluation of application of ethanolic extract of propolis-loaded poly(-lactic-co-glycolic acid) nanoparticles (EEP-PLGA NPs) on wound healing in diabetic rats. Sixty rats were randomized into four groups of 15 rats each: In control group (Control) diabetic wound was treated with normal saline. In Carrier 1 group diabetic wound was treated with PLGA nanoparticles based solution. In Carrier 2 group the diabetic wound was treated with EEP. In Treatment group animals received EEP-PLGA NPs on the wound. Wound size was measured on 7, 14 and 21 days after surgery. The expression of p53, bcl-2, Caspase III, were evaluated using reverse-transcription PCR and Immunohistochemical staining. The Treatment group had significantly reduced the wound size compared to other groups ( P = 0.001). histological and morphometric studies, and mean rank of the qualitative studies demonstrated that there was significant difference between Treatment group and other groups ( P < .05). Observations demonstrated that ethanolic extract of propolis-loaded PLGA nanoparticles significantly shortened the inflammatory phase and accelerated the cellular proliferation. Accordingly, the animals in Treatment group revealed significantly ( P < .05) higher fibroblast distribution/one mm2 of wound area and rapid re epithelialization. The mRNA levels of bcl-2, p53 and caspase III were remarkably ( P < .05) higher in Treatment group compared to control and animals. The immunohistochemical analyzes confirmed the RT-PCR findings. EEP-PLGA NPs offered potential advantages in wound healing acceleration and improvement through angiogenesis stimulation, fibroblast proliferation and granulation tissue formation in early days of healing phases, acceleration in diabetic wound repair associated with earlier wound contraction and stability of damaged area by rearrangement of granulation tissue and collagen fibers.

scholarly journals Transplantation of Bone Marrow-Derived Mesenchymal Stem Cells Promotes Delayed Wound Healing in Diabetic Rats

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Jiangbo Wan ◽  
Liulu Xia ◽  
Wenjia Liang ◽  
Yi Liu ◽  
Qian Cai
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Wound Healing ◽  
Mesenchymal Stem Cells ◽  
Diabetic Foot ◽  
Diabetic Rats ◽  
Foot Ulcers ◽  
Allogeneic Bone ◽  
Diabetic Foot Ulcers ◽  
Delayed Wound Healing

In this paper, we established a delayed wound healing model on diabetic rat to mimic the pathophysiology of clinical patients who suffered from diabetic foot ulcers. We also evaluated if transplantation of allogeneic bone marrow-derived mesenchymal stem cells could promote the delayed wound healing and investigated the possible underlying biological mechanisms and stem cell behavior involved in this process. The results showed that bone marrow-derived mesenchymal stem cells had a positive effect on delayed wound healing in diabetic rats. Intramuscular transplantation demonstrated the best efficacy. This effect is associated with granulation tissue formation, angiogenesis, cellular proliferation, and high vascular endothelial growth factor expression in wound tissues. In addition, bone marrow-derived mesenchymal stem cells have been shown to mobilize and find home for ischemic and wounded tissues to participate in the process of wound healing. Intramuscular transplantation of exogenous isogeneic stem cells may be suitable for clinical application in the treatment of diabetic foot ulcers although the safety of this therapy should be considered.

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