Fibroblast Counts Research Articles

Comparison of histopathological and biomechanical changes of ligamentum mucosum in patients with anterior cruciate ligament rupture.

The aim of this study was to identify the biomechanical and histopathological changes of ligamentum mucosum (LM) in patients with intact versus ruptured anterior cruciate ligament (ACL). A total of 67 patients (45 males, 22 females; mean age: 33.2±7.9 years; range, 18 to 45 years) who underwent arthroscopic knee surgery for intraarticular pathologies between July 2022 and January 2023 were prospectively analyzed. The patients with LM were divided into two groups as the ACL intact group (n=31) and ACL ruptured group (n=36). Biomechanical tests and histopathological examinations were performed in all LM patients. Age and body mass index distributions were similar between the groups (p>0.05). Peak force values of the LM in the ACL ruptured group were significantly higher than the ACL intact group (p=0.037). No significant difference was found between the groups in terms of collagen index (p=0.103) and fibroblast count (p=0.821). The peak force values of the LM were significantly higher in the ACL ruptured group as compared to the ACL intact group, which is probably due to the adaptation of LM in patients with ACL rupture against increased deforming forces to maintain knee stability.

Effects of 3% Mobe (Artocarpus lakoocha) leaf extract gel on the post-extraction socket: In-vivo study

Background: Mobe (Artocarpus lakoocha) is recognized for its potential in accelerating wound healing, attributed to its secondary metabolites. However, its impact on hard tissue healing on post- extraction tooth sockets has been underexplored. Purpose: This study aims to analyze the effects of 3% Mobe leaf extract gel on the number of fibroblasts, osteoblasts, osteocytes and post-extraction sockets in Wistar rats. Methods: Thirty-two male Wistar rats had their left mandibular incisors extracted and were divided into eight groups. Mobe leaf extract gel was applied to Group I-IV and Aloclair® gel was applied to Group V-VIII for 14 days, twice a day. Residual socket volume (RSV) and fibroblast counts were measured on days 3, 7, and 14, while osteoblast and osteocyte counts were assessed on days 7, 14, and 28 post extraction. The RSV data were analyzed using repeated measures analysis of variance (ANOVA) and post-hoc least significant difference (LSD) test, while fibroblasts, osteoblasts, and osteocytes counts were analyzed with one-way ANOVA and post-hoc LSD tests. Results: RSV decreased significantly in both groups on day 14 (p=0.001 and p=0.002); however, the RSV was lower on the Mobe group. The fibroblast counts were higher in the Mobe group (p=0.001), and there was a significant difference in the mean number of osteoblasts and osteocytes in the Mobe group (p= 0.043 and p=0.008). Conclusion: The study concludes that 3% Mobe leaf gel extract is better than Aloclair® in accelerating socket healing mainly due to increased proliferation of fibroblasts, osteoblasts, and osteocytes.

POTENCY OF OCIMUM SANCTUM L EXTRACT OINTMENT ON THE MANAGEMENT PARTIAL-THICKNESS PALPEBRAL LACERATION, IS IT A NOVELTY TO BE CONSIDERED AS AN ALTERNATIVE THERAPY?: REVIEW ON HISTOPATHOLOGICAL CHANGES IN EXPERIMENTAL MODEL

Introduction and Objective: Ocimum sanctum extract (OSE) has been shown to have antioxidant, anti-inflammatory, and antibacterial properties which are responsible for wound healing. This study aims to analyze the effect of 5%, 10%, and 15% OSE ointment on changes in collagen density and fibroblast count in Wistar rats with partial-thickness palpebral laceration. Methods: Laboratory experimental study with randomized post-test only control group design. The subjects were 30 rats divided into 5 groups: The placebo; Gentamicin 0.3%; OSE 5%; OSE 10% and OSE 15% group. The intervention was administered 2 times/day for 4 days. On the fifth day, the palpebral tissue was obtained to make histopathological preparations and to observe the collagen density and fibroblast count. Data were analyzed using Mann-Whitney, One-Way ANOVA, Kruskal Wallis, and Tamhane test. A p-value <0.05 was assigned to the statistically significant. Results: The placebo group revealed loose collagen tissue and OSE 15% and gentamicin group revealed dense collagen tissue. The low fibroblast count was in the gentamicin and OSE 15% group and the highest fibroblast count was in the placebo group with a mean of 19.77±3.29; 22,67±0,73 and 60.9±10.66 cells, respectively. There was a significant difference (p<0.001) in the collagen density and the fibroblast count based on the treatment groups. Posthoc tests revealed differences in the collagen density level and the fibroblast count between the placebo and the whole group. Conclusion: There was a significant difference between placebo and all groups of collagen density changes and fibroblast count. There was no difference between OSE 15% and gentamicin both microscopically and statistically. Keywords: Ocimum sanctum L, Extract of Ocimum sanctum L, partial-thickness palpebral laceration, fibroblast cell count, collagen density

POTENCY OF OCIMUM SANCTUM EXTRACT L OINTMENT ON THE MANAGEMENT PARTIAL-THICKNESS PALPEBRAL LACERATION, IS IT A NOVELTY TO BE CONSIDERED AS AN ALTERNATIVE THERAPY?: REVIEW ON HISTOPATHOLOGICAL CHANGES IN EXPERIMENTAL MODEL

Abstract
 Introduction & Objectives : Ocimum sanctum extract (OSE) has been shown to have antioxidant, anti-inflammatory, and antibacterial properties which are responsible for wound healing. This study aims to analyze the effect of 5%, 10%, and 15% OSE ointment on changes in collagen density and fibroblast count in Wistar rats with partial-thickness palpebral laceration.
 Methods : Laboratory experimental study with randomized post-test only control group design. The subjects were 30 rats divided into 5 groups: The placebo; Gentamicin 0.3%; OSE 5%; OSE 10% and OSE 15% group. The intervention was administered 2 times/day for 4 days. On the fifth day, the eyelid tissue was obtained to make histopathological preparations and to observe the collagen density and fibroblast count. Data were analyzed using Mann-Whitney, One-Way ANOVA, Kruskal Wallis, and Tamhane test. A p-value <0.05 was assigned to the statistically significant.
 Results : The placebo group revealed loose collagen tissue and OSE 15% and gentamicin group revealed dense collagen tissue. The low fibroblast count was in the gentamicin and OSE 15% group and the highest fibroblast count was in the placebo group with a mean of 19.77±3.29; 22,67±0,73 and 60.9±10.66 cells, respectively. There was a significant difference (p<0.001) in the collagen density and the fibroblast count based on the treatment groups. Posthoc tests revealed differences in the collagen density level and the fibroblast count between the placebo and the whole group.
 Conclusion : There was a significant difference between placebo and all groups of collagen density changes and fibroblast count. There was no difference between OSE 15% and gentamicin both microscopically and statistically.

Snakehead Fish Extract in Increasing Skin Collagen & Fibroblasts

This study aim is to gain a deeper understanding of the mechanisms by which snakehead fish extract affects the skin, opening doors for the development of more effective and natural skincare products. The study employs a systematic literature review method using PRISMA strategy, identifying 156 relevant articles through platforms such as PubMed, Google Scholar, Scopus, SINTA, spanning from 2018 to 2023. Findings encompass increased VEGF production and NO levels with snakehead fish extract dosages, wounds healing potential of honey and snakehead fish skin combination in hydrogel formulations, increased fibroblast counts, reduced skin erythema, and decreased wound crust formation. Additionally, marine collagen exhibits promise in skin healing and bone repair. Collagen supplements, whether oral or topical, also prove beneficial in delaying skin aging. The study reveals crucial insights into the potential of snakehead fish extract in skincare and wound healing, supporting the development of more effective and natural skincare products.

Comparative Study of Liposomal and Ethosomal Formulations of Curcuma heyneana Rhizome Extract in a Transdermal Delivery System.

This study aimed to develop an anti-aging nanoformulation with Curcuma heyneana extract as bioactive substance. Curcuma heyneana Valeton & Zipj extract has been proven in previous research to have antioxidant, anti-ageing, anti-inflammatory, and wound healing properties, which makes it a potential bioactive material for anti-ageing and sunscreen cosmetic products. Phytoantioxidants need to penetrate into deeper skin layers to ensure effectivity. Thus, a transdermal delivery system is needed to deliver the extract to a deeper skin layer. The objective of the study was to compare the permeability and anti-ageing activity of liposomal and ethosomal formulations of C. heynena rhizome ethanolic extract. In this study, C. heyneana extract was loaded into a phospholipid vesicular system in the form of liposome and ethosome formulations using the ethanolic injection method. The anti-ageing activity was assessed by analyzing the epidermal thickness, number of sunburn cells, distance between collagen fibres, and number of fibroblasts. While the histologic specimen scoring was carried out for the in vivo penetration study. The ethosomal formulation had been found to have better penetration ability since it was able to reach the lower dermis area compared to the liposomes, which only reached the upper dermis. The ethosomal formulation of C. heyneana extract exhibited a better anti-ageing activity based on the parameters of epidermal thickness, sunburn cell count, fibroblast count, and the distance between collagen fibres in rat skin histology. Ethosomes have been found to be a more proficient carrier system for transdermal delivery of C. heyneana extract compared to liposomes. Meanwhile, their penetration correlated with the effectivity of the formulation, suggesting that the vesicular system enhanced the penetration ability of the extract.

Effects of platelet-rich plasma and stromal vascular factor combination on fibroblast count in anal trauma in Wistar rats

Effects of platelet-rich plasma and stromal vascular factor combination on fibroblast count in anal trauma in Wistar rats

The Comparative Dermal Stimulation Potential of Constant-Volume and Constant-Amount Diluted Calcium Hydroxylapatite Injections Versus the Concentrated Form.

Biostimulation properties of diluted and hyperdiluted calcium hydroxylapatite (CaHA) injections have become increasingly popular. However, the existing data are insufficient to certify a particular dose-response pattern. To assess and compare the dermal stimulation potentials of different concentrations of CaHA injections. Two independent experiments (Experiment-1: constant injection volume vs Experiment-2: constant CaHA amount) included 4 study groups each, and these experimental groups were placed consecutively on the abdominal skin of a juvenile Yorkshire pig. Histopathological and immunohistochemical stainings were performed on punch biopsy materials collected 4 months after the injection day. The fibroblast count significantly decreased upon dilution from 1:3 to 1:19 in experiment 1 ( p = .000) but still higher than the control group. In experiment 1, the collagen density of the concentrated form was more elevated than the 1:19 dilution and the negative control groups ( p = .034 and .000, respectively) but similar to the 1:3 dilution ( p = .123). No significant difference was observed between the groups regarding collagen density with a standard amount of CaHA (0.2 mL, 30%) ( p > .05). Despite the efficacy being more pronounced till 1:3 dilution, hyperdiluted CaHA at any dilution ratio up to 1:19 can provide a higher fibroblast count than the negative control group.

Effect of Gelatin-Based Hemostats on Fibroblasts and Relevant Growth Factors in Wound Healing.

Gelatin-based hemostats have been used in various surgical fields and showed advantageous effects on central aspects of wound healing when compared to cellulose-based hemostats. Nevertheless, the influence of gelatin-based hemostats on wound healing has not been fully explored yet. Hemostats were applied to fibroblast cell cultures for 5, 30, 60 min, 24 h, 7 and 14 days and measurements were taken at 3, 6, 12, 24 h and 7 or 14 days, respectively. Cell proliferation was quantified after different exposure times and a contraction assay was conducted to measure the extent of the extracellular matrix over time. We further assessed quantitative levels of vascular endothelial growth factor and basic fibroblast growth factor using enzyme-linked immunosorbent assay. Fibroblast counts decreased significantly at 7 and 14 days independent of the application duration (p < 0.001 for 5 min application). The gelatin-based hemostat did not have a negative impact on cell matrix contraction. After application of gelatin-based hemostat, the basic fibroblast growth factor did not change; yet, the vascular endothelial growth factor significantly increased after a prolonged 24 h application time when compared to controls or to a 6 h exposure (p < 0.05). Gelatin-based hemostats did not impair contraction of the extracellular matrix or growth factor production (vascular endothelial growth factor and basic fibroblast growth factor), while cell proliferation diminished at late time points. In conclusion, the gelatin-based material seems to be compatible with central aspects of wound healing. For further clinical assessment, future animal and human studies are necessary.

Effect of autologous conditioned serum (ACS) on histological characteristics and expression of soft tissue IL-1β gene after horizontal ridge augmentation surgery.

Horizontal ridge augmentation surgeries are common procedures in periodontics. Histological changes in soft tissues affect the success of surgery in many ways. Autologous conditioned serum (ACS) increases interleukin-1 receptor antagonist (IL-1Ra) and causes inflammation modulation. Therefore, the present study aimed to investigate the effect of ACS on histological changes and gene expression of soft tissues after horizontal ridge augmentation surgeries. This double-blind split-mouth clinical trial was performed on patients needing implants with horizontal ridge augmentation (n=21). The control and intervention groups were considered split-mouth in two areas of the patients' oral soft tissues. A collagen membrane impregnated with ACS was used on the test side, and only a collagen membrane was used on the control side. After four months, histological changes in soft tissues, such as the amount of connective tissue collagen, fibroblast and inflammatory cell counts, and expression of the IL-1β gene, were evaluated. The fibroblast counts in the ACS group were significantly higher than in the control group. In addition, ACS caused a significant increase in the amount of collagen in the soft tissues compared to the control group (P<0.01). However, the number of inflammatory cells was similar in the two groups (P>0.05). IL-1β gene expression was not significantly different between the case and control groups. Under the limitations of the present study and based on the results of histological examinations, ACS increased the number of fibroblasts and the amount of collagen in soft tissues without affecting inflammatory cells (P=0.562).

Effect of Locally Administered Estradiol on Wound Healing in a Nasal Septal Perforation Animal Model.

We aimed to investigate the effect of estradiol on wound healing in an experimental nasal septal perforation (NSP) model created in rats. Twenty-two Sprague Dawley healthy male rats were separated into two groups. NSP, approximately 2 mm in diameter, was created in each animal. The 0.1 mL 0.12% estradiol (12 g/L) (study group) and 0.1 mL 0.9% saline (9 g/L) (control group) were applied topically once a day for 14 days. The rats were sacrificed on the 14th day and the cartilage nasal septum of each animal was excised for histopathological examination. The nasal mucosal epithelial regeneration and degeneration, acute inflammatory cell count, fibroblast number, vascularization, granulation tissue formation, giant cell number, eosinophil number, degeneration and regeneration of the nasal cartilage, and collagen density were examined. The macroscopic closure rate of the perforations and histopathological parameters were evaluated statistically. In this study, the epithelial regeneration, the fibroblast count, the granulation tissue formation, and the amount of collagen were significantly higher in the study group than in the saline group (p < 0.05). The acute inflammatory activity was lower in the estradiol group than in the saline group (p < 0.05). There was no statistically significant difference in the closure rate of perforation between the two groups (p = 0.163). No significant difference was found in other comparisons (p > 0.05). The locally administered estradiol may improve wound healing of the nasal septum in an experimental NSP animal model. LEVEL OF EVIDENCE: Not applicable.

Application of combined photobiomodulation and curcumin-loaded iron oxide nanoparticles considerably enhanced repair in an infected, delayed-repair wound model in diabetic rats compared to either treatment alone.

Herein, we attempted toevaluate the therapeutic potential of photobiomodulation (PBM) and curcumin-loaded iron nanoparticles (CUR), alone and in combination, on wound closure rate (WCR), microbial flora by measuring colony-forming units (CFUs), the stereological and biomechanical properties of repairing wounds in the maturation stage of the wound healing course in an ischemic infected delayed healing wound model (IIDHWM) of type I diabetic (TIDM) rats. There were four groups: group 1 was the control, group 2 received CUR, rats in group 3 were exposed to PBM (80Hz, 890nm, and 0.2J/cm2), and rats in group 4 received both PBM and CUR (PBM + CUR). We found CFU was decreased in groups 2, 3, and 4 compared to group 1 (p = 0.000 for all). Groups 2, 3, and 4 showed a considerable escalation in WCR compared to group 1 (p = 0.000 for all). In terms of wound strength parameters, substantial increases in bending stiffness and high-stress load were observed in groups 2, 3, and 4 compared to group 1 (p = 0.000 for all). Stereological examinations revealed decreases in neutrophil and macrophage counts and increases in fibroblast counts in groups 2, 3, and 4compared to group 1 (p = 0.000 for all). Blood vessel counts were more dominant in the PBM and PBM + CURgroups over group 1 (p = 0.000 for all). CFU and wound strength as well as macrophage, neutrophil, and fibroblast counts were found to be improved in the PBM + CUR and PBMgroups compared to the CUR group (ranging fromp = 0.000 top < 0.05). Better results were achieved in the PBM + CUR treatment over the PBM therapy. We determined therapy with PBM + CUR, PBM alone, and CUR alone substantially accelerated diabetic woundhealing in an IIDHWM of TIDM rats compared to control group. Concomitantly, the PBM + CUR and PBM groups attained significantly enhanced results for WCR, stereological parameters, and wound strength than the CUR group, with the PBM + CUR results being superior to those of the PBM group.

The effect of Curcuma longa extract on fibroblast count and collagen density in intestinal anastomosis: an experimental study on New Zealand rabbits

Background: Anastomotic leakage was the most feared complication after intestinal surgery because it could bring morbidity and mortality. Curcuma longa (turmeric) has been known for its effect on wound healing by increasing fibroblast count and collagen density. Nevertheless, its effect on intestine anastomosis has not yet been proven. This study was an experimental study on New Zealand rabbits to analyze the effect of Curcuma longa extract on fibroblast count and collagen density in intestinal anastomosis. Methods: This study was a randomized control trial experimental study on a New Zealand white rabbit. The rabbits were divided into 2 groups randomly, the control group and the treatment group, which were given Curcuma longa extract for 4 days after laparotomy intestinal resection and anastomosis. Fibroblast count and collagen density of the anastomotic area were evaluated on the 5th day after the surgery. Results: 36 New Zealand white rabbits underwent laparotomy intestinal resection and anastomosis, then randomly divided into 2 groups. On the 5th day, the subjects were evaluated. The analysis results showed that the control group had a lower mean count of fibroblasts (9.89) than the treatment group (27.11), with the Mann-Whitney analysis showing significant differences (p-value 0.000). The lowest score for collagen density in the control group was +2, with the highest being +3. While on the treatment group, the lowest score was +3, and the highest was +4. The mean value was lower in the control group (10.61) rather than in the treatment group (26.39), with the Mann-Whitney analysis showing significant differences (p-value 0.000). Conclusion: Curcuma longa extract had an effect on intestinal anastomosis by increasing fibroblast count and collagen density.

Effectiveness of topical turmeric extract compared to topical zinc on fibroblast count and collagen density in clean-contaminated wound: a study on new zealand white rabbit

Introduction: Wound dehiscence increased the average mortality and morbidity, patient care cost and health services. Therefore, a more effective and lower-cost therapy is needed for wound healing. Zinc is a trace element which is important in the wound-healing process, while curcumin is an active component of turmeric which can also help the wound-healing process. This study aims to compare the effectiveness of topical turmeric extract with topical zinc on fibroblast count and collagen density in clean-contaminated wounds in New Zealand white rabbits. Material and Methods: This study was a randomized experimental study in 30 New Zealand white rabbits with clean contaminated wounds divided into 3 groups. One control group (treated with NaCl 0.9%) and two treatment groups (treated with topical turmeric extract and with topical zinc). Appendectomy was performed to all samples and surgical wounds were treated until day 4 postoperative. On the fifth day, histopathology observation at the edge of the surgical wound was done to see the fibroblast count using Haematoxylin Eosin staining and collagen density using Masson Trichrome staining. Results: There was a significant difference in the number of fibroblasts between the control group (NaCl 0.9%), the topical zinc group and the topical turmeric extract group (Kruskal-Wallis p=0.000). The collagen density score also had significant differences in the three groups (Kruskal-Wallis p=0.003). Although the Mann-Whitney test in the topical zinc group and the topical turmeric extract group showed no significant difference in the collagen density score (p=0.074). Conclusion: Topical administration of turmeric extract has been shown to affect the number of fibroblasts and collagen density in clean-contaminated wounds in New Zealand white rabbits, as well as topical zinc administration.

EFFECT OF BEVACIZUMAB ON α-SMOOTH MUSCLE ACTIN EXPRESSION AND FIBROBLAST COUNT IN TRABECULECTOMY AREA TOWARDS PREVENTION OF FIBROSIS

Objective to analyze the effect of bevacizumab on α-smooth muscle actin expression and fibroblast count in trabeculectomy area of rabbit models in order to find a safer modulator of wound healing to improve surgical outcome. Material and methods 16 New Zealand white rabbits aged 4-6 months and weigh between 2,5-3,5 kg were performed trabeculectomy in their right eyes with postoperative subconjunctival injection of BSS and Bevacizumab. Rabbits were put into control and bevacizumab group using simple random sampling. Examination were done postoperative day 1, 7, and 14 and subjects were terminated and performed enucleation on postoperative day 14. The samples were histologically stained with Haematoxyline-Eosin to count the fibroblast and immunohistochemistry using α-smooth muscle actin antibody to differ the myofibroblast from fibroblast and the expression of α-SMA were collected using immunoreactive score. Result Mann Whitney u test and independent t-test were used to analyze the data, and we found both less expression of α-smooth muscle actin and fibroblast count on bevacizumab group compared to control group which indicates less myofibroblast, fibroblast, and less scarring potential in trabeculectomy area. Conclusion bevacizumab inhibits fibroblast proliferation and its differentiation to myofibroblast that lead to less collagen production and fibrosis.

The effect of hypertonic alkaline nasal irrigation on nasal wound healing in an experimental animal model

Objectives: This study aimed to examine the effect of a hypertonic alkaline nasal irrigation (HANI) solution on nasal healing in an animal model of nasal septal perforation (NSP). Materials and Methods: In the experimental animal study, 22 healthy male Sprague-Dawley rats were divided in to two groups: the HANI (study) group and the saline (control) group. An NSP about 2 mm in size was formed in each rat. In the study group, 0.1 mL of HANI was intranasally administered each day for 14 days, whereas the control group daily received 0.1 mL of saline for the same period. The animals were sacrificed on Day 14, and the subjects’ nasal septums were excised for histopathology. The amount of regeneration and degeneration of epithelial tissue, inflammatory cell count, fibroblast count, amount of collagen, new vessel formation, amount of granulation, giant cell count, eosinophil count, and the degeneration and regeneration of cartilage tissue were examined. The macroscopic recovery rates of NPSs and microscopic parameters were statistically analyzed. Results: The acute inflammatory cell density was significantly lower in the study group (p=0.033). The epithelial and cartilage regenerations, fibroblast number, vascularization, amount of granulation, and collagen density were higher in the study group. In addition, the epithelial and cartilage degenerations were lower in the study group. However, no significant difference was detected in the evaluation of the remaining parameters (p&gt;0.05). Conclusion: Hypertonic alkaline nasal irrigation may not adversely affect nasal wound healing and may reduce acute inflammation in nasal septal wound healing in an NSP animal model.

Wet Versus Dry Temporalis Fascia Graft in Type 1 Tympanoplasty: A Randomized Study on Controversy.

A 3 year prospective, randomized, comparative study between 2019 and 2021. Mahatma Gandhi University of Medical Sciences and Technology, Jaipur. 100 adult patients of either sex were taken in this study, ranging between 15 and 60 years who fulfilled inclusion and exclusion criteria. These patients were randomly divided into 2 groups of 50 each, one in dry graft and another in wet graft group. A comparative analysis was done on the graft placement time, fibroblast count and hearing improvement postoperatively between the two groups. Results- The dry graft and wet graft groups had overall surgical success rates of 86 and 94 per cent, respectively; this finding was not statistically significant. A statistically significant high fibroblast count was observed in wet grafts, but it did not correlate with surgical success. Conclusion- A dry or wet temporalis fascia graft has no influence on the outcome of tympanoplasty type I.

“Ultraviolet C phototherapy as an adjunct wound therapy in full-thickness wound of a rat model”

Ultraviolet C (UVC) phototherapy is a potential modality to improve wound healing due to its well-known antimicrobial properties, and it promotes the expression of certain growth factors. However, limited data exist to show the clinical effect of UVC in wound healing compared with other advanced modern dressings. This animal preclinical study involved 56 Sprague–Dawley female rats aged 3 months old, weighing between 250 and 300 g, which were acclimatized for one week. Following the creation of a 2 × 2-cm-square full-thickness wound over the dorsum of each rat, they were divided into four treatment groups, namely, the control, UVC, hydrofiber silver, and UVC/hydrofiber silver groups. On Days 2, 4, 7, 10, 14, 21, and 28 postwounding, two rats from each group underwent wound assessment via wound measurement (mm2), calculation of the percentage of wound contracture and percentage of epithelization. Wound specimens were obtained for histological examination of inflammatory cells (neutrophils, lymphocytes and macrophages) and fibroblast cell counts. There was a relationship between wound size reduction and time to heal (P<0.05, R2=0.70) among the four treatment groups. The UVC/hydrofiber silver group had a significantly smaller wound size given the time to heal compared with the control group (P = 0.01) and UVC group (P = 0.02). There were no significant differences in terms of wound contracture and epithelization percentage among the four treatment groups. Histopathological examination revealed a significantly lower mean fibroblast count in the UVC/hydrofiber silver group than in the other groups (P = 0.025). These data suggested that UVC phototherapy did not increase the rate of healing but maintained the integrity of the wound by providing antimicrobial properties and preventing overproduction of fibroblasts. UVC was also safe, as no overt inflammatory response was discovered.

Effectiveness of Experimental Colitis Therapy with Original Vitamin D3 Rectal Suppositories

Background: Pathogenesis of inflammatory bowel disease (IBD) is insufficiently explored, while most of the therapeutic agents used for IBD cases have undesirable side effects, which restrict their administration.The aim of this research was to study the influence of vitamin D3 formulated into original rectal suppositories on the parameters of clinical score, morphology, and oxidative lipid and protein destruction in the colonic lesion in the cases of experimental colitis (EC). Methods and Results: The experiment was performed on 98 Wistar male rats weighing 210-230 g. EC condition was induced by two-phase administration (dermal application and per rectum) of 3% alcohol solution of oxazolone. Originator polyethylene glycol-based suppositories, which contained 1500 МЕ of vitamin D3, were administered per rectum every 12 hours. Clinical score was defined according to the Disease Activity Index (DAI) scale. Morphometry was run using the software program “ImageScope M” (Russia). Damage of the colonic tissue was estimated on Tissue Damage Index (TDI). The following parameters were determined in the colonic lesion: neutrophil count (NC), lymphocyte count (LC), eosinophil count (EC), histiocyte count (HC), plasma cell count (PC), fibroblast count (FC), the diameter of the ulcerous defect, TDI, MPO expression, and TNF-α expression. The following parameters were determined in the damaged tissue homogenate: lipid peroxidation product count (LPP) and protein oxidative modification (POM) count. In cases of oxazolone-induced EC, on Days 2, 4, and 6, we registered clinical and laboratory signs, an ulcerous defect in the damaged area of the colon, all of which are typical for IBD conditions. There was an increase in DAI (peak on Day 6) and TDI (peak on Day 2). We also found an increase in NC (peak on Day 2), LC (peak on Day 6), EC (peak on Day 2), PC (peak on Day 2), HC (peak on Day 2), and FC (peak on Day 2). There was an increase in MPO expression (peak on Day 2) and TNF-α expression (peak on Days 2 and 4). We observed increases in the primary, secondary, and end LPP counts and the early-phase and late-phase POM counts in spontaneous and induced modes. An administration of 1500ME vitamin D3 rectal suppositories every 12 hours for 6 days decreased the severity of clinical manifestations and DAI. It reduced the area of the ulcerous defect and decreased the TDI on Days 4 and 6 of the experiment. On the background of using vitamin D3 rectal suppositories, we found a decrease in NC, EC, LC, and PC in the damaged area and an increase in HC and FC on Days 2, 4, and 6 from the start of the experiment. Administration of D3 rectal suppositories decreased МРО expression and TNF-α expression on Days 4 and 6 of EC. In the damaged area of the colon, we observed a decrease in the counts of the primary, secondary, and end LPP on Days 4 and 6 of the experiment. We also documented a decrease in the POM count in spontaneous mode on Day 2 and on Day 6 in induced mode. Conclusion: Vitamin D3 as a constituent of originator rectal suppositories in total dose 18,000 МЕ in the pre-clinical phase of EC decreases the intensity of EC clinical manifestations. It reduces the count of the cells that take part in tissue destruction in the colonic wall, of TNF-α and MPO expression levels, and LPP- and POM product count. It increases the count of the cells, which promotes tissue reparation. The obtained results are essential for carrying out further research aimed at elaboration of the mechanism of the D3 effect in cases of IBD and at its possible clinical use.

The effect of locally administered phenytoin on wound healing in an experimental nasal septal perforation animal model.

In the present study, we aimed to investigate the effect of phenytoin (PHT) on wound healing in an experimental nasal septal perforation (NSP) model created in rats. Twenty-two Sprague Dawley male rats were randomized into two groups. NSP, approximately 2mm in diameter, was created in each subject. The 1% PHT cream (Study group) and saline (Control group) were applied topically once a day for 14days. The subjects were sacrificed at the end of 14th day and the nasal septum of each animal was excised for histopathological examination. The epithelial regeneration and degeneration of the nasal mucosa, acute inflammatory cells number, fibroblast number, collagen density, vascularization, eosinophil number, granulation tissue formation, giant cell number, degeneration and regeneration of the nasal cartilage were examined. The macroscopic closure rate of NPSs and histopathological parameters were analyzed statistically. In this study, the epithelial regeneration, the fibroblast count, the collagen density, the vascularization and the amount of granulation tissue and the macroscopic clouse rate of NSPs were significantly higher in the PHT group than in the saline group (p < .05). There was no significant difference was in other comparisons (p > .05). The locally administered phenytoin may accelerate wound healing of nasal septum in an experimental NSP model. Consequently, phenytoin might be used as an effective substance to prevent the formation of NSP.